eventespresso / event-espresso-core

core/admin/EE_Admin_Page_Loader.core.php

Indentation +433 added lines, -433 removed lines

@@ -16,437 +16,437 @@
  */
 class EE_Admin_Page_Loader
 {
-    /**
-     * @var AdminMenuManager $menu_manager
-     */
-    protected $menu_manager;
-
-    /**
-     * @var LoaderInterface $loader
-     */
-    protected $loader;
-
-    /**
-     * _installed_pages
-     * objects for page_init objects detected and loaded
-     *
-     * @access private
-     * @var EE_Admin_Page_Init[]
-     */
-    private $_installed_pages = [];
-
-
-    /**
-     * this is used to hold the registry of menu slugs for all the installed admin pages
-     *
-     * @var array
-     */
-    private $_menu_slugs = [];
-
-
-    /**
-     * _caffeinated_extends
-     * This array is the generated configuration array for which core EE_Admin pages are extended (and the bits and
-     * pieces needed to do so).  This property is defined in the _set_caffeinated method.
-     *
-     * @var array
-     */
-    private $_caffeinated_extends = [];
-
-
-    /**
-     * This property will hold the hook file for setting up the filter that does all the connections between admin
-     * pages.
-     *
-     * @var string
-     */
-    public $hook_file;
-
-    /**
-     * @var   int
-     * @since 5.0.0.p
-     */
-    private $maintenance_mode = 0;
-
-
-    /**
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function __construct(?LoaderInterface $loader)
-    {
-        $this->loader = $loader instanceof LoaderInterface ? $loader : LoaderFactory::getLoader();
-        $this->menu_manager = $this->loader->getShared(AdminMenuManager::class, [$this->loader]);
-    }
-
-
-    /**
-     * @throws EE_Error
-     * @throws ReflectionException
-     * @since 5.0.0.p
-     */
-    public function init()
-    {
-        $this->menu_manager->initialize();
-        $this->maintenance_mode = EE_Maintenance_Mode::instance()->level() === EE_Maintenance_Mode::level_2_complete_maintenance;
-        // let's do a scan and see what installed pages we have
-        $this->findAndLoadAdminPages();
-    }
-
-
-    /**
-     * When caffeinated system is detected, this method is called to setup the caffeinated directory constants used by
-     * files in the caffeinated folder.
-     *
-     * @access private
-     * @return void
-     */
-    private function defineCaffeinatedConstants()
-    {
-        if (! defined('EE_CORE_CAF_ADMIN')) {
-            define('EE_CORE_CAF_ADMIN', EE_PLUGIN_DIR_PATH . 'caffeinated/admin/');
-            define('EE_CORE_CAF_ADMIN_URL', EE_PLUGIN_DIR_URL . 'caffeinated/admin/');
-            define('EE_CORE_CAF_ADMIN_NEW', EE_CORE_CAF_ADMIN . 'new/');
-            define('EE_CORE_CAF_ADMIN_EXTEND', EE_CORE_CAF_ADMIN . 'extend/');
-            define('EE_CORE_CAF_ADMIN_EXTEND_URL', EE_CORE_CAF_ADMIN_URL . 'extend/');
-            define('EE_CORE_CAF_ADMIN_HOOKS', EE_CORE_CAF_ADMIN . 'hooks/');
-        }
-    }
-
-
-    /**
-     * This just gets the list of installed EE_Admin_pages.
-     *
-     * @access private
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    private function findAndLoadAdminPages()
-    {
-        $admin_pages = $this->findAdminPages();
-        // this just checks the caffeinated folder and takes care of setting up any caffeinated stuff.
-        $admin_pages = $this->findCaffeinatedAdminPages($admin_pages);
-        // then extensions and hooks, although they don't get added to the admin pages array
-        $this->findAdminPageExtensions();
-        $this->findAdminPageHooks();
-        // allow plugins to add in their own pages (note at this point they will need to have an autoloader defined for their class) OR hook into EEH_Autoloader::load_admin_page() to add their path.;
-        // loop through admin pages and setup the $_installed_pages array.
-        $hooks_ref = [];
-        $menu_pages = [];
-        foreach ($admin_pages as $page => $path) {
-            // don't load the page init class IF IT's ALREADY LOADED !!!
-            if (
-                isset($this->_installed_pages[ $page ])
-                && $this->_installed_pages[ $page ] instanceof EE_Admin_Page_Init
-            ) {
-                continue;
-            }
-            // build list of installed pages
-            $admin_page_init = $this->loadAdminPageInit($page);
-            $this->_installed_pages[ $page ] = $admin_page_init;
-            $admin_menu = $this->menu_manager->getAdminMenu($admin_page_init);
-            $admin_page_init->setCapability($admin_menu->capability(), $admin_menu->menuSlug());
-            // skip if in full maintenance mode and maintenance_mode_parent is NOT set
-            if ($this->maintenance_mode && ! $admin_menu->maintenanceModeParent()) {
-                unset($admin_pages[ $page ]);
-                continue;
-            }
-            $menu_slug = $admin_menu->menuSlug();
-            $this->_menu_slugs[ $menu_slug ] = $page;
-            $menu_pages[ $menu_slug ] = $admin_page_init;
-            // now that we've got the admin_init objects...
-            // lets see if there are any caffeinated pages extending the originals.
-            // If there are then let's hook into the init admin filter and load our extend instead.
-            // Set flag for register hooks on extended pages b/c extended pages use the default INIT.
-            $extended_hooks = $admin_page_init->register_hooks(
-                $this->loadCaffeinatedExtensions($admin_page_init, $page, $menu_slug)
-            );
-            $hooks_ref      += $extended_hooks;
-        }
-        // the hooks_ref is all the pages where we have $extended _Hooks files
-        // that will extend a class in a different folder.
-        // So we want to make sure we load the file for the parent.
-        // first make sure we've got unique values
-        $hooks_ref = array_unique($hooks_ref);
-        // now let's loop and require!
-        foreach ($hooks_ref as $path) {
-            require_once($path);
-        }
-        // make sure we have menu slugs global setup. Used in EE_Admin_Page->page_setup() to ensure we don't do a full class load for an admin page that isn't requested.
-        global $ee_menu_slugs;
-        $ee_menu_slugs = $this->_menu_slugs;
-        // we need to loop again to run any early code
-        foreach ($this->_installed_pages as $page) {
-            $page->do_initial_loads();
-        }
-        $this->menu_manager->setInstalledPages($menu_pages);
-        do_action('AHEE__EE_Admin_Page_Loader___get_installed_pages_loaded', $this->_installed_pages);
-    }
-
-
-    /**
-     * @return array
-     * @throws EE_Error
-     * @since   5.0.0.p
-     */
-    private function findAdminPages(): array
-    {
-
-        // grab everything in the  admin core directory
-        $admin_page_folders = $this->findAdminPageFolders(EE_ADMIN_PAGES . '*');
-        $admin_page_folders = apply_filters(
-            'FHEE__EE_Admin_Page_Loader__findAdminPages__admin_page_folders',
-            $admin_page_folders
-        );
-        if (! empty($admin_page_folders)) {
-            return $admin_page_folders;
-        }
-        $error_msg = esc_html__(
-            'There are no EE_Admin pages detected, it looks like EE did not install properly',
-            'event_espresso'
-        );
-        $error_msg .= '||';
-        $error_msg .= sprintf(
-            esc_html__(
-                'Check that the %s folder exists and is writable. Maybe try deactivating, then reactivating Event Espresso again.',
-                'event_espresso'
-            ),
-            EE_ADMIN_PAGES
-        );
-        throw new RuntimeException($error_msg);
-    }
-
-
-    /**
-     * get_admin_page_object
-     *
-     * @param string $page_slug
-     * @return EE_Admin_Page
-     */
-    public function get_admin_page_object(string $page_slug = ''): ?EE_Admin_Page
-    {
-        return isset($this->_installed_pages[ $page_slug ])
-               && $this->_installed_pages[ $page_slug ] instanceof EE_Admin_Page_Init
-            ? $this->_installed_pages[ $page_slug ]->loaded_page_object()
-            : null;
-    }
-
-
-    /**
-     * generates an "Admin Page Init" class based on the directory  name
-     *
-     * @param string $dir_name
-     * @return string
-     */
-    private function getClassnameForAdminPageInit(string $dir_name = ''): string
-    {
-        $class_name = str_replace('_', ' ', strtolower($dir_name));
-        return str_replace(' ', '_', ucwords($class_name)) . '_Admin_Page_Init';
-    }
-
-
-    /**
-     * _load_admin_page
-     * Loads and instantiates page_init object for a single EE_admin page.
-     *
-     * @param string $page page_reference
-     * @return EE_Admin_Page_Init
-     * @throws EE_Error
-     */
-    private function loadAdminPageInit(string $page = ''): EE_Admin_Page_Init
-    {
-        $class_name = $this->getClassnameForAdminPageInit($page);
-        if (class_exists($class_name)) {
-            $admin_page_init = $this->loader->getShared($class_name);
-            // verify returned object
-            if ($admin_page_init instanceof EE_Admin_Page_Init) {
-                return $admin_page_init;
-            }
-        }
-        $error_msg = sprintf(
-            esc_html__('Something went wrong with loading the %s admin page.', 'event_espresso'),
-            $page
-        );
-        $error_msg .= '||'; // separates public from developer messages
-        $error_msg .= "\r\n";
-        $error_msg .= sprintf(
-            esc_html__('There is no Init class in place for the %s admin page.', 'event_espresso'),
-            $page
-        );
-        $error_msg .= '<br />';
-        $error_msg .= sprintf(
-            esc_html__(
-                'Make sure you have %1$s defined. If this is a non-EE-core admin page then you also must have an autoloader in place for your class',
-                'event_espresso'
-            ),
-            '<strong>' . $class_name . '</strong>'
-        );
-        throw new EE_Error($error_msg);
-    }
-
-
-    /**
-     * This method is the "workhorse" for detecting and setting up caffeinated functionality.
-     * In this method there are three checks being done:
-     * 1. Do we have any NEW admin page sets.  If we do, lets add them into the menu setup (via the $admin_pages
-     * array) etc.  (new page sets are found in caffeinated/new/{page})
-     * 2. Do we have any EXTENDED page sets.  Basically an extended EE_Admin Page extends the core {child}_Admin_Page
-     * class.  eg. would be caffeinated/extend/events/Extend_Events_Admin_Page.core.php and in there would be a class:
-     * Extend_Events_Admin_Page extends Events_Admin_Page.
-     * 3. Do we have any files just for setting up hooks into other core pages.  The files can be any name in
-     * "caffeinated/hooks" EXCEPT they need a ".class.php" extension and the file name must correspond with the
-     * classname inside.  These classes are instantiated really early so that any hooks in them are run before the
-     * corresponding apply_filters/do_actions that are found in any future loaded EE_Admin pages (INCLUDING caffeinated
-     * admin_pages)
-     *
-     * @param array $admin_pages the original installed_refs array that may contain our NEW EE_Admin_Pages to be
-     *                              loaded.
-     * @return array
-     * @throws EE_Error
-     */
-    private function findCaffeinatedAdminPages(array $admin_pages): array
-    {
-        // first let's check if there IS a caffeinated folder. If there is not then lets get out.
-        if ((defined('EE_DECAF') && EE_DECAF) || ! is_dir(EE_PLUGIN_DIR_PATH . 'caffeinated/admin')) {
-            return $admin_pages;
-        }
-        $this->defineCaffeinatedConstants();
-        // okay let's setup an "New" pages first (we'll return installed refs later)
-        $admin_pages += $this->findAdminPageFolders(EE_CORE_CAF_ADMIN . 'new/*', ['tickets']);
-
-        return apply_filters(
-            'FHEE__EE_Admin_Page_Loader___get_installed_pages__installed_refs',
-            $admin_pages
-        );
-    }
-
-
-    /**
-     * @throws EE_Error
-     * @since   5.0.0.p
-     */
-    private function findAdminPageExtensions()
-    {
-        // let's see if there are any EXTENDS to setup in the $_caffeinated_extends array
-        // (that will be used later for hooking into the _initialize_admin_age in the related core_init admin page)
-        $extensions = $this->findAdminPageFolders(EE_CORE_CAF_ADMIN . 'extend/*');
-        if ($extensions) {
-            foreach ($extensions as $folder => $extension) {
-                // convert lowercase_snake_case to Uppercase_Snake_Case
-                $filename = str_replace(' ', '_', ucwords(str_replace('_', ' ', $folder)));
-                $filename = "Extend_{$filename}_Admin_Page";
-                $filepath = EE_CORE_CAF_ADMIN . "extend/$folder/$filename.core.php";
-                // save filename and filepath for later
-                $this->_caffeinated_extends[ $folder ]['path']       = str_replace(['\\', '/'], '/', $filepath);
-                $this->_caffeinated_extends[ $folder ]['admin_page'] = $filename;
-            }
-        }
-        $this->_caffeinated_extends = apply_filters(
-            'FHEE__EE_Admin_Page_Loader___get_installed_pages__caffeinated_extends',
-            $this->_caffeinated_extends
-        );
-    }
-
-
-    private function loadCaffeinatedExtensions(
-        EE_Admin_Page_Init $admin_page_init,
-        string $page,
-        string $menu_slug
-    ): bool {
-        if (! isset($this->_caffeinated_extends[ $page ])) {
-            return false;
-        }
-        $admin_page_name = $admin_page_init->get_admin_page_name();
-        $caf_path        = $this->_caffeinated_extends[ $page ]['path'];
-        $caf_admin_page  = $this->_caffeinated_extends[ $page ]['admin_page'];
-        add_filter(
-            "FHEE__EE_Admin_Page_Init___initialize_admin_page__path_to_file__{$menu_slug}_$admin_page_name",
-            static function ($path_to_file) use ($caf_path) {
-                return $caf_path;
-            }
-        );
-        add_filter(
-            "FHEE__EE_Admin_Page_Init___initialize_admin_page__admin_page__{$menu_slug}_$admin_page_name",
-            static function ($admin_page) use ($caf_admin_page) {
-                return $caf_admin_page;
-            }
-        );
-        return true;
-    }
-
-
-    /**
-     * @throws EE_Error
-     * @since   5.0.0.p
-     */
-    private function findAdminPageHooks()
-    {
-        // let's see if there are any HOOK files and instantiate them if there are (so that hooks are loaded early!).
-        $ee_admin_hooks   = [];
-        $admin_page_hooks = $this->findAdminPageFolders(EE_CORE_CAF_ADMIN . 'hooks/*.class.php', [], 0, false);
-        if ($admin_page_hooks) {
-            foreach ($admin_page_hooks as $hook) {
-                if (is_readable($hook)) {
-                    require_once $hook;
-                    $classname = str_replace([EE_CORE_CAF_ADMIN . 'hooks/', '.class.php'], '', $hook);
-                    if (class_exists($classname)) {
-                        $ee_admin_hooks[] = $this->loader->getShared($classname);
-                    }
-                }
-            }
-        }
-        apply_filters('FHEE__EE_Admin_Page_Loader__set_caffeinated__ee_admin_hooks', $ee_admin_hooks);
-    }
-
-
-    /**
-     * _default_header_link
-     * This is just a dummy method to use with header submenu items
-     *
-     * @return bool false
-     */
-    public function _default_header_link(): bool
-    {
-        return false;
-    }
-
-
-    /**
-     * @param string $path
-     * @param int    $flags
-     * @param array  $exclude
-     * @param bool   $register_autoloaders
-     * @return array
-     * @throws EE_Error
-     * @since 5.0.0.p
-     */
-    private function findAdminPageFolders(
-        string $path,
-        array $exclude = [],
-        int $flags = GLOB_ONLYDIR,
-        bool $register_autoloaders = true
-    ): array {
-        $folders = [];
-        $subfolders = glob($path, $flags);
-        if ($subfolders) {
-            foreach ($subfolders as $admin_screen) {
-                $admin_screen_name = basename($admin_screen);
-                // files and anything in the exclude array need not apply
-                if (! in_array($admin_screen_name, $exclude, true)) {
-                    // these folders represent the different EE admin pages
-                    $folders[ $admin_screen_name ] = $admin_screen;
-                    if ($register_autoloaders) {
-                        // set autoloaders for our admin page classes based on included path information
-                        EEH_Autoloader::register_autoloaders_for_each_file_in_folder($admin_screen);
-                    }
-                }
-            }
-        }
-        return $folders;
-    }
+	/**
+	 * @var AdminMenuManager $menu_manager
+	 */
+	protected $menu_manager;
+
+	/**
+	 * @var LoaderInterface $loader
+	 */
+	protected $loader;
+
+	/**
+	 * _installed_pages
+	 * objects for page_init objects detected and loaded
+	 *
+	 * @access private
+	 * @var EE_Admin_Page_Init[]
+	 */
+	private $_installed_pages = [];
+
+
+	/**
+	 * this is used to hold the registry of menu slugs for all the installed admin pages
+	 *
+	 * @var array
+	 */
+	private $_menu_slugs = [];
+
+
+	/**
+	 * _caffeinated_extends
+	 * This array is the generated configuration array for which core EE_Admin pages are extended (and the bits and
+	 * pieces needed to do so).  This property is defined in the _set_caffeinated method.
+	 *
+	 * @var array
+	 */
+	private $_caffeinated_extends = [];
+
+
+	/**
+	 * This property will hold the hook file for setting up the filter that does all the connections between admin
+	 * pages.
+	 *
+	 * @var string
+	 */
+	public $hook_file;
+
+	/**
+	 * @var   int
+	 * @since 5.0.0.p
+	 */
+	private $maintenance_mode = 0;
+
+
+	/**
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function __construct(?LoaderInterface $loader)
+	{
+		$this->loader = $loader instanceof LoaderInterface ? $loader : LoaderFactory::getLoader();
+		$this->menu_manager = $this->loader->getShared(AdminMenuManager::class, [$this->loader]);
+	}
+
+
+	/**
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 * @since 5.0.0.p
+	 */
+	public function init()
+	{
+		$this->menu_manager->initialize();
+		$this->maintenance_mode = EE_Maintenance_Mode::instance()->level() === EE_Maintenance_Mode::level_2_complete_maintenance;
+		// let's do a scan and see what installed pages we have
+		$this->findAndLoadAdminPages();
+	}
+
+
+	/**
+	 * When caffeinated system is detected, this method is called to setup the caffeinated directory constants used by
+	 * files in the caffeinated folder.
+	 *
+	 * @access private
+	 * @return void
+	 */
+	private function defineCaffeinatedConstants()
+	{
+		if (! defined('EE_CORE_CAF_ADMIN')) {
+			define('EE_CORE_CAF_ADMIN', EE_PLUGIN_DIR_PATH . 'caffeinated/admin/');
+			define('EE_CORE_CAF_ADMIN_URL', EE_PLUGIN_DIR_URL . 'caffeinated/admin/');
+			define('EE_CORE_CAF_ADMIN_NEW', EE_CORE_CAF_ADMIN . 'new/');
+			define('EE_CORE_CAF_ADMIN_EXTEND', EE_CORE_CAF_ADMIN . 'extend/');
+			define('EE_CORE_CAF_ADMIN_EXTEND_URL', EE_CORE_CAF_ADMIN_URL . 'extend/');
+			define('EE_CORE_CAF_ADMIN_HOOKS', EE_CORE_CAF_ADMIN . 'hooks/');
+		}
+	}
+
+
+	/**
+	 * This just gets the list of installed EE_Admin_pages.
+	 *
+	 * @access private
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	private function findAndLoadAdminPages()
+	{
+		$admin_pages = $this->findAdminPages();
+		// this just checks the caffeinated folder and takes care of setting up any caffeinated stuff.
+		$admin_pages = $this->findCaffeinatedAdminPages($admin_pages);
+		// then extensions and hooks, although they don't get added to the admin pages array
+		$this->findAdminPageExtensions();
+		$this->findAdminPageHooks();
+		// allow plugins to add in their own pages (note at this point they will need to have an autoloader defined for their class) OR hook into EEH_Autoloader::load_admin_page() to add their path.;
+		// loop through admin pages and setup the $_installed_pages array.
+		$hooks_ref = [];
+		$menu_pages = [];
+		foreach ($admin_pages as $page => $path) {
+			// don't load the page init class IF IT's ALREADY LOADED !!!
+			if (
+				isset($this->_installed_pages[ $page ])
+				&& $this->_installed_pages[ $page ] instanceof EE_Admin_Page_Init
+			) {
+				continue;
+			}
+			// build list of installed pages
+			$admin_page_init = $this->loadAdminPageInit($page);
+			$this->_installed_pages[ $page ] = $admin_page_init;
+			$admin_menu = $this->menu_manager->getAdminMenu($admin_page_init);
+			$admin_page_init->setCapability($admin_menu->capability(), $admin_menu->menuSlug());
+			// skip if in full maintenance mode and maintenance_mode_parent is NOT set
+			if ($this->maintenance_mode && ! $admin_menu->maintenanceModeParent()) {
+				unset($admin_pages[ $page ]);
+				continue;
+			}
+			$menu_slug = $admin_menu->menuSlug();
+			$this->_menu_slugs[ $menu_slug ] = $page;
+			$menu_pages[ $menu_slug ] = $admin_page_init;
+			// now that we've got the admin_init objects...
+			// lets see if there are any caffeinated pages extending the originals.
+			// If there are then let's hook into the init admin filter and load our extend instead.
+			// Set flag for register hooks on extended pages b/c extended pages use the default INIT.
+			$extended_hooks = $admin_page_init->register_hooks(
+				$this->loadCaffeinatedExtensions($admin_page_init, $page, $menu_slug)
+			);
+			$hooks_ref      += $extended_hooks;
+		}
+		// the hooks_ref is all the pages where we have $extended _Hooks files
+		// that will extend a class in a different folder.
+		// So we want to make sure we load the file for the parent.
+		// first make sure we've got unique values
+		$hooks_ref = array_unique($hooks_ref);
+		// now let's loop and require!
+		foreach ($hooks_ref as $path) {
+			require_once($path);
+		}
+		// make sure we have menu slugs global setup. Used in EE_Admin_Page->page_setup() to ensure we don't do a full class load for an admin page that isn't requested.
+		global $ee_menu_slugs;
+		$ee_menu_slugs = $this->_menu_slugs;
+		// we need to loop again to run any early code
+		foreach ($this->_installed_pages as $page) {
+			$page->do_initial_loads();
+		}
+		$this->menu_manager->setInstalledPages($menu_pages);
+		do_action('AHEE__EE_Admin_Page_Loader___get_installed_pages_loaded', $this->_installed_pages);
+	}
+
+
+	/**
+	 * @return array
+	 * @throws EE_Error
+	 * @since   5.0.0.p
+	 */
+	private function findAdminPages(): array
+	{
+
+		// grab everything in the  admin core directory
+		$admin_page_folders = $this->findAdminPageFolders(EE_ADMIN_PAGES . '*');
+		$admin_page_folders = apply_filters(
+			'FHEE__EE_Admin_Page_Loader__findAdminPages__admin_page_folders',
+			$admin_page_folders
+		);
+		if (! empty($admin_page_folders)) {
+			return $admin_page_folders;
+		}
+		$error_msg = esc_html__(
+			'There are no EE_Admin pages detected, it looks like EE did not install properly',
+			'event_espresso'
+		);
+		$error_msg .= '||';
+		$error_msg .= sprintf(
+			esc_html__(
+				'Check that the %s folder exists and is writable. Maybe try deactivating, then reactivating Event Espresso again.',
+				'event_espresso'
+			),
+			EE_ADMIN_PAGES
+		);
+		throw new RuntimeException($error_msg);
+	}
+
+
+	/**
+	 * get_admin_page_object
+	 *
+	 * @param string $page_slug
+	 * @return EE_Admin_Page
+	 */
+	public function get_admin_page_object(string $page_slug = ''): ?EE_Admin_Page
+	{
+		return isset($this->_installed_pages[ $page_slug ])
+			   && $this->_installed_pages[ $page_slug ] instanceof EE_Admin_Page_Init
+			? $this->_installed_pages[ $page_slug ]->loaded_page_object()
+			: null;
+	}
+
+
+	/**
+	 * generates an "Admin Page Init" class based on the directory  name
+	 *
+	 * @param string $dir_name
+	 * @return string
+	 */
+	private function getClassnameForAdminPageInit(string $dir_name = ''): string
+	{
+		$class_name = str_replace('_', ' ', strtolower($dir_name));
+		return str_replace(' ', '_', ucwords($class_name)) . '_Admin_Page_Init';
+	}
+
+
+	/**
+	 * _load_admin_page
+	 * Loads and instantiates page_init object for a single EE_admin page.
+	 *
+	 * @param string $page page_reference
+	 * @return EE_Admin_Page_Init
+	 * @throws EE_Error
+	 */
+	private function loadAdminPageInit(string $page = ''): EE_Admin_Page_Init
+	{
+		$class_name = $this->getClassnameForAdminPageInit($page);
+		if (class_exists($class_name)) {
+			$admin_page_init = $this->loader->getShared($class_name);
+			// verify returned object
+			if ($admin_page_init instanceof EE_Admin_Page_Init) {
+				return $admin_page_init;
+			}
+		}
+		$error_msg = sprintf(
+			esc_html__('Something went wrong with loading the %s admin page.', 'event_espresso'),
+			$page
+		);
+		$error_msg .= '||'; // separates public from developer messages
+		$error_msg .= "\r\n";
+		$error_msg .= sprintf(
+			esc_html__('There is no Init class in place for the %s admin page.', 'event_espresso'),
+			$page
+		);
+		$error_msg .= '<br />';
+		$error_msg .= sprintf(
+			esc_html__(
+				'Make sure you have %1$s defined. If this is a non-EE-core admin page then you also must have an autoloader in place for your class',
+				'event_espresso'
+			),
+			'<strong>' . $class_name . '</strong>'
+		);
+		throw new EE_Error($error_msg);
+	}
+
+
+	/**
+	 * This method is the "workhorse" for detecting and setting up caffeinated functionality.
+	 * In this method there are three checks being done:
+	 * 1. Do we have any NEW admin page sets.  If we do, lets add them into the menu setup (via the $admin_pages
+	 * array) etc.  (new page sets are found in caffeinated/new/{page})
+	 * 2. Do we have any EXTENDED page sets.  Basically an extended EE_Admin Page extends the core {child}_Admin_Page
+	 * class.  eg. would be caffeinated/extend/events/Extend_Events_Admin_Page.core.php and in there would be a class:
+	 * Extend_Events_Admin_Page extends Events_Admin_Page.
+	 * 3. Do we have any files just for setting up hooks into other core pages.  The files can be any name in
+	 * "caffeinated/hooks" EXCEPT they need a ".class.php" extension and the file name must correspond with the
+	 * classname inside.  These classes are instantiated really early so that any hooks in them are run before the
+	 * corresponding apply_filters/do_actions that are found in any future loaded EE_Admin pages (INCLUDING caffeinated
+	 * admin_pages)
+	 *
+	 * @param array $admin_pages the original installed_refs array that may contain our NEW EE_Admin_Pages to be
+	 *                              loaded.
+	 * @return array
+	 * @throws EE_Error
+	 */
+	private function findCaffeinatedAdminPages(array $admin_pages): array
+	{
+		// first let's check if there IS a caffeinated folder. If there is not then lets get out.
+		if ((defined('EE_DECAF') && EE_DECAF) || ! is_dir(EE_PLUGIN_DIR_PATH . 'caffeinated/admin')) {
+			return $admin_pages;
+		}
+		$this->defineCaffeinatedConstants();
+		// okay let's setup an "New" pages first (we'll return installed refs later)
+		$admin_pages += $this->findAdminPageFolders(EE_CORE_CAF_ADMIN . 'new/*', ['tickets']);
+
+		return apply_filters(
+			'FHEE__EE_Admin_Page_Loader___get_installed_pages__installed_refs',
+			$admin_pages
+		);
+	}
+
+
+	/**
+	 * @throws EE_Error
+	 * @since   5.0.0.p
+	 */
+	private function findAdminPageExtensions()
+	{
+		// let's see if there are any EXTENDS to setup in the $_caffeinated_extends array
+		// (that will be used later for hooking into the _initialize_admin_age in the related core_init admin page)
+		$extensions = $this->findAdminPageFolders(EE_CORE_CAF_ADMIN . 'extend/*');
+		if ($extensions) {
+			foreach ($extensions as $folder => $extension) {
+				// convert lowercase_snake_case to Uppercase_Snake_Case
+				$filename = str_replace(' ', '_', ucwords(str_replace('_', ' ', $folder)));
+				$filename = "Extend_{$filename}_Admin_Page";
+				$filepath = EE_CORE_CAF_ADMIN . "extend/$folder/$filename.core.php";
+				// save filename and filepath for later
+				$this->_caffeinated_extends[ $folder ]['path']       = str_replace(['\\', '/'], '/', $filepath);
+				$this->_caffeinated_extends[ $folder ]['admin_page'] = $filename;
+			}
+		}
+		$this->_caffeinated_extends = apply_filters(
+			'FHEE__EE_Admin_Page_Loader___get_installed_pages__caffeinated_extends',
+			$this->_caffeinated_extends
+		);
+	}
+
+
+	private function loadCaffeinatedExtensions(
+		EE_Admin_Page_Init $admin_page_init,
+		string $page,
+		string $menu_slug
+	): bool {
+		if (! isset($this->_caffeinated_extends[ $page ])) {
+			return false;
+		}
+		$admin_page_name = $admin_page_init->get_admin_page_name();
+		$caf_path        = $this->_caffeinated_extends[ $page ]['path'];
+		$caf_admin_page  = $this->_caffeinated_extends[ $page ]['admin_page'];
+		add_filter(
+			"FHEE__EE_Admin_Page_Init___initialize_admin_page__path_to_file__{$menu_slug}_$admin_page_name",
+			static function ($path_to_file) use ($caf_path) {
+				return $caf_path;
+			}
+		);
+		add_filter(
+			"FHEE__EE_Admin_Page_Init___initialize_admin_page__admin_page__{$menu_slug}_$admin_page_name",
+			static function ($admin_page) use ($caf_admin_page) {
+				return $caf_admin_page;
+			}
+		);
+		return true;
+	}
+
+
+	/**
+	 * @throws EE_Error
+	 * @since   5.0.0.p
+	 */
+	private function findAdminPageHooks()
+	{
+		// let's see if there are any HOOK files and instantiate them if there are (so that hooks are loaded early!).
+		$ee_admin_hooks   = [];
+		$admin_page_hooks = $this->findAdminPageFolders(EE_CORE_CAF_ADMIN . 'hooks/*.class.php', [], 0, false);
+		if ($admin_page_hooks) {
+			foreach ($admin_page_hooks as $hook) {
+				if (is_readable($hook)) {
+					require_once $hook;
+					$classname = str_replace([EE_CORE_CAF_ADMIN . 'hooks/', '.class.php'], '', $hook);
+					if (class_exists($classname)) {
+						$ee_admin_hooks[] = $this->loader->getShared($classname);
+					}
+				}
+			}
+		}
+		apply_filters('FHEE__EE_Admin_Page_Loader__set_caffeinated__ee_admin_hooks', $ee_admin_hooks);
+	}
+
+
+	/**
+	 * _default_header_link
+	 * This is just a dummy method to use with header submenu items
+	 *
+	 * @return bool false
+	 */
+	public function _default_header_link(): bool
+	{
+		return false;
+	}
+
+
+	/**
+	 * @param string $path
+	 * @param int    $flags
+	 * @param array  $exclude
+	 * @param bool   $register_autoloaders
+	 * @return array
+	 * @throws EE_Error
+	 * @since 5.0.0.p
+	 */
+	private function findAdminPageFolders(
+		string $path,
+		array $exclude = [],
+		int $flags = GLOB_ONLYDIR,
+		bool $register_autoloaders = true
+	): array {
+		$folders = [];
+		$subfolders = glob($path, $flags);
+		if ($subfolders) {
+			foreach ($subfolders as $admin_screen) {
+				$admin_screen_name = basename($admin_screen);
+				// files and anything in the exclude array need not apply
+				if (! in_array($admin_screen_name, $exclude, true)) {
+					// these folders represent the different EE admin pages
+					$folders[ $admin_screen_name ] = $admin_screen;
+					if ($register_autoloaders) {
+						// set autoloaders for our admin page classes based on included path information
+						EEH_Autoloader::register_autoloaders_for_each_file_in_folder($admin_screen);
+					}
+				}
+			}
+		}
+		return $folders;
+	}
 }

core/admin/EE_Admin_Page.core.php

Indentation +4262 added lines, -4262 removed lines

@@ -24,4350 +24,4350 @@
  */
 abstract class EE_Admin_Page extends EE_Base implements InterminableInterface
 {
-    /**
-     * @var EE_Admin_Config
-     */
-    protected $admin_config;
+	/**
+	 * @var EE_Admin_Config
+	 */
+	protected $admin_config;
 
-    /**
-     * @var LoaderInterface
-     */
-    protected $loader;
+	/**
+	 * @var LoaderInterface
+	 */
+	protected $loader;
 
-    /**
-     * @var RequestInterface
-     */
-    protected $request;
+	/**
+	 * @var RequestInterface
+	 */
+	protected $request;
 
-    // set in _init_page_props()
-    public $page_slug;
+	// set in _init_page_props()
+	public $page_slug;
 
-    public $page_label;
+	public $page_label;
 
-    public $page_folder;
+	public $page_folder;
 
-    // set in define_page_props()
-    protected $_admin_base_url;
+	// set in define_page_props()
+	protected $_admin_base_url;
 
-    protected $_admin_base_path;
+	protected $_admin_base_path;
 
-    protected $_admin_page_title;
+	protected $_admin_page_title;
 
-    protected $_labels;
+	protected $_labels;
 
 
-    // set early within EE_Admin_Init
-    protected $_wp_page_slug;
+	// set early within EE_Admin_Init
+	protected $_wp_page_slug;
 
-    // nav tabs
-    protected $_nav_tabs;
+	// nav tabs
+	protected $_nav_tabs;
 
-    protected $_default_nav_tab_name;
+	protected $_default_nav_tab_name;
 
 
-    // template variables (used by templates)
-    protected $_template_path;
+	// template variables (used by templates)
+	protected $_template_path;
 
-    protected $_column_template_path;
+	protected $_column_template_path;
 
-    /**
-     * @var array $_template_args
-     */
-    protected $_template_args = [];
+	/**
+	 * @var array $_template_args
+	 */
+	protected $_template_args = [];
 
-    /**
-     * this will hold the list table object for a given view.
-     *
-     * @var EE_Admin_List_Table $_list_table_object
-     */
-    protected $_list_table_object;
+	/**
+	 * this will hold the list table object for a given view.
+	 *
+	 * @var EE_Admin_List_Table $_list_table_object
+	 */
+	protected $_list_table_object;
 
-    // boolean
-    protected $_is_UI_request; // this starts at null so we can have no header routes progress through two states.
+	// boolean
+	protected $_is_UI_request; // this starts at null so we can have no header routes progress through two states.
 
-    protected $_routing;
+	protected $_routing;
 
-    // list table args
-    protected $_view;
+	// list table args
+	protected $_view;
 
-    protected $_views;
+	protected $_views;
 
 
-    // action => method pairs used for routing incoming requests
-    protected $_page_routes;
+	// action => method pairs used for routing incoming requests
+	protected $_page_routes;
 
-    /**
-     * @var array $_page_config
-     */
-    protected $_page_config;
+	/**
+	 * @var array $_page_config
+	 */
+	protected $_page_config;
 
-    /**
-     * the current page route and route config
-     *
-     * @var array|string|null $_route
-     */
-    protected $_route;
+	/**
+	 * the current page route and route config
+	 *
+	 * @var array|string|null $_route
+	 */
+	protected $_route;
 
-    /**
-     * @var string $_cpt_route
-     */
-    protected $_cpt_route;
+	/**
+	 * @var string $_cpt_route
+	 */
+	protected $_cpt_route;
 
-    /**
-     * @var array $_route_config
-     */
-    protected $_route_config;
+	/**
+	 * @var array $_route_config
+	 */
+	protected $_route_config;
 
-    /**
-     * Used to hold default query args for list table routes to help preserve stickiness of filters for carried out
-     * actions.
-     *
-     * @since 4.6.x
-     * @var array.
-     */
-    protected $_default_route_query_args;
+	/**
+	 * Used to hold default query args for list table routes to help preserve stickiness of filters for carried out
+	 * actions.
+	 *
+	 * @since 4.6.x
+	 * @var array.
+	 */
+	protected $_default_route_query_args;
 
-    // set via request page and action args.
-    protected $_current_page;
+	// set via request page and action args.
+	protected $_current_page;
 
-    protected $_current_view;
+	protected $_current_view;
 
-    protected $_current_page_view_url;
+	protected $_current_page_view_url;
 
-    /**
-     * unprocessed value for the 'action' request param (default '')
-     *
-     * @var string
-     */
-    protected $raw_req_action = '';
+	/**
+	 * unprocessed value for the 'action' request param (default '')
+	 *
+	 * @var string
+	 */
+	protected $raw_req_action = '';
 
-    /**
-     * unprocessed value for the 'page' request param (default '')
-     *
-     * @var string
-     */
-    protected $raw_req_page = '';
-
-    /**
-     * sanitized request action (and nonce)
-     *
-     * @var string
-     */
-    protected $_req_action = '';
-
-    /**
-     * sanitized request action nonce
-     *
-     * @var string
-     */
-    protected $_req_nonce = '';
-
-    /**
-     * @var string
-     */
-    protected $_search_btn_label = '';
-
-    /**
-     * @var string
-     */
-    protected $_search_box_callback = '';
-
-    /**
-     * @var WP_Screen
-     */
-    protected $_current_screen;
-
-    // for holding EE_Admin_Hooks object when needed (set via set_hook_object())
-    protected $_hook_obj;
-
-    // for holding incoming request data
-    protected $_req_data = [];
-
-    // yes / no array for admin form fields
-    protected $_yes_no_values = [];
-
-    // some default things shared by all child classes
-    protected $_default_espresso_metaboxes = [
-        '_espresso_news_post_box',
-        '_espresso_links_post_box',
-        '_espresso_ratings_request',
-        '_espresso_sponsors_post_box',
-    ];
-
-    /**
-     * @var EE_Registry
-     */
-    protected $EE;
-
-
-    /**
-     * This is just a property that flags whether the given route is a caffeinated route or not.
-     *
-     * @var boolean
-     */
-    protected $_is_caf = false;
-
-    /**
-     * whether or not initializePage() has run
-     *
-     * @var boolean
-     */
-    protected $initialized = false;
-
-    /**
-     * @var FeatureFlags
-     */
-    protected $feature;
-
-
-    /**
-     * @var string
-     */
-    protected $class_name;
-
-    /**
-     * if the current class is an admin page extension, like: Extend_Events_Admin_Page,
-     * then this would be the parent classname: Events_Admin_Page
-     *
-     * @var string
-     */
-    protected $base_class_name;
-
-    /**
-     * @var array
-     * @since 5.0.0.p
-     */
-    private $publish_post_meta_box_hidden_fields = [];
-
-
-    /**
-     * @Constructor
-     * @param bool $routing indicate whether we want to just load the object and handle routing or just load the object.
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function __construct($routing = true)
-    {
-        $this->loader       = LoaderFactory::getLoader();
-        $this->admin_config = $this->loader->getShared('EE_Admin_Config');
-        $this->feature      = $this->loader->getShared(FeatureFlags::class);
-        $this->request      = $this->loader->getShared(RequestInterface::class);
-        // routing enabled?
-        $this->_routing = $routing;
-
-        $this->class_name      = get_class($this);
-        $this->base_class_name = strpos($this->class_name, 'Extend_') === 0
-            ? str_replace('Extend_', '', $this->class_name)
-            : '';
-
-        if (strpos($this->_get_dir(), 'caffeinated') !== false) {
-            $this->_is_caf = true;
-        }
-        $this->_yes_no_values = [
-            ['id' => true, 'text' => esc_html__('Yes', 'event_espresso')],
-            ['id' => false, 'text' => esc_html__('No', 'event_espresso')],
-        ];
-        // set the _req_data property.
-        $this->_req_data = $this->request->requestParams();
-    }
-
-
-    /**
-     * @return EE_Admin_Config
-     */
-    public function adminConfig(): EE_Admin_Config
-    {
-        return $this->admin_config;
-    }
-
-
-    /**
-     * @return FeatureFlags
-     */
-    public function feature(): FeatureFlags
-    {
-        return $this->feature;
-    }
-
-
-    /**
-     * This logic used to be in the constructor, but that caused a chicken <--> egg scenario
-     * for child classes that needed to set properties prior to these methods getting called,
-     * but also needed the parent class to have its construction completed as well.
-     * Bottom line is that constructors should ONLY be used for setting initial properties
-     * and any complex initialization logic should only run after instantiation is complete.
-     *
-     * This method gets called immediately after construction from within
-     *      EE_Admin_Page_Init::_initialize_admin_page()
-     *
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @since 5.0.0.p
-     */
-    public function initializePage()
-    {
-        if ($this->initialized) {
-            return;
-        }
-        // set initial page props (child method)
-        $this->_init_page_props();
-        // set global defaults
-        $this->_set_defaults();
-        // set early because incoming requests could be ajax related and we need to register those hooks.
-        $this->_global_ajax_hooks();
-        $this->_ajax_hooks();
-        // other_page_hooks have to be early too.
-        $this->_do_other_page_hooks();
-        // set up page dependencies
-        $this->_before_page_setup();
-        $this->_page_setup();
-        $this->initialized = true;
-    }
-
-
-    /**
-     * _init_page_props
-     * Child classes use to set at least the following properties:
-     * $page_slug.
-     * $page_label.
-     *
-     * @abstract
-     * @return void
-     */
-    abstract protected function _init_page_props();
-
-
-    /**
-     * _ajax_hooks
-     * child classes put all their add_action('wp_ajax_{name_of_hook}') hooks in here.
-     * Note: within the ajax callback methods.
-     *
-     * @abstract
-     * @return void
-     */
-    abstract protected function _ajax_hooks();
-
-
-    /**
-     * _define_page_props
-     * child classes define page properties in here.  Must include at least:
-     * $_admin_base_url = base_url for all admin pages
-     * $_admin_page_title = default admin_page_title for admin pages
-     * $_labels = array of default labels for various automatically generated elements:
-     *    array(
-     *        'buttons' => array(
-     *            'add' => esc_html__('label for add new button'),
-     *            'edit' => esc_html__('label for edit button'),
-     *            'delete' => esc_html__('label for delete button')
-     *            )
-     *        )
-     *
-     * @abstract
-     * @return void
-     */
-    abstract protected function _define_page_props();
-
-
-    /**
-     * _set_page_routes
-     * child classes use this to define the page routes for all subpages handled by the class.  Page routes are
-     * assigned to a action => method pairs in an array and to the $_page_routes property.  Each page route must also
-     * have a 'default' route. Here's the format
-     * $this->_page_routes = array(
-     *        'default' => array(
-     *            'func' => '_default_method_handling_route',
-     *            'args' => array('array','of','args'),
-     *            'noheader' => true, //add this in if this page route is processed before any headers are loaded (i.e.
-     *            ajax request, backend processing)
-     *            'headers_sent_route'=>'headers_route_reference', //add this if noheader=>true, and you want to load a
-     *            headers route after.  The string you enter here should match the defined route reference for a
-     *            headers sent route.
-     *            'capability' => 'route_capability', //indicate a string for minimum capability required to access
-     *            this route.
-     *            'obj_id' => 10 // if this route has an object id, then this can include it (used for capability
-     *            checks).
-     *        ),
-     *        'insert_item' => '_method_for_handling_insert_item' //this can be used if all we need to have is a
-     *        handling method.
-     *        )
-     * )
-     *
-     * @abstract
-     * @return void
-     */
-    abstract protected function _set_page_routes();
-
-
-    /**
-     * _set_page_config
-     * child classes use this to define the _page_config array for all subpages handled by the class. Each key in the
-     * array corresponds to the page_route for the loaded page. Format:
-     * $this->_page_config = array(
-     *        'default' => array(
-     *            'labels' => array(
-     *                'buttons' => array(
-     *                    'add' => esc_html__('label for adding item'),
-     *                    'edit' => esc_html__('label for editing item'),
-     *                    'delete' => esc_html__('label for deleting item')
-     *                ),
-     *                'publishbox' => esc_html__('Localized Title for Publish metabox', 'event_espresso')
-     *            ), //optional an array of custom labels for various automatically generated elements to use on the
-     *            page. If this isn't present then the defaults will be used as set for the $this->_labels in
-     *            _define_page_props() method
-     *            'nav' => array(
-     *                'label' => esc_html__('Label for Tab', 'event_espresso').
-     *                'url' => 'http://someurl', //automatically generated UNLESS you define
-     *                'css_class' => 'css-class', //automatically generated UNLESS you define
-     *                'order' => 10, //required to indicate tab position.
-     *                'persistent' => false //if you want the nav tab to ONLY display when the specific route is
-     *                displayed then add this parameter.
-     *            'list_table' => 'name_of_list_table' //string for list table class to be loaded for this admin_page.
-     *            'metaboxes' => array('metabox1', 'metabox2'), //if present this key indicates we want to load
-     *            metaboxes set for eventespresso admin pages.
-     *            'has_metaboxes' => true, //this boolean flag can simply be used to indicate if the route will have
-     *            metaboxes.  Typically this is used if the 'metaboxes' index is not used because metaboxes are added
-     *            later.  We just use this flag to make sure the necessary js gets enqueued on page load.
-     *            'has_help_popups' => false //defaults(true) //this boolean flag can simply be used to indicate if the
-     *            given route has help popups setup and if it does then we need to make sure thickbox is enqueued.
-     *            'columns' => array(4, 2), //this key triggers the setup of a page that uses columns (metaboxes).  The
-     *            array indicates the max number of columns (4) and the default number of columns on page load (2).
-     *            There is an option in the "screen_options" dropdown that is setup so users can pick what columns they
-     *            want to display.
-     *            'help_tabs' => array( //this is used for adding help tabs to a page
-     *                'tab_id' => array(
-     *                    'title' => 'tab_title',
-     *                    'filename' => 'name_of_file_containing_content', //this is the primary method for setting
-     *                    help tab content.  The fallback if it isn't present is to try a the callback.  Filename
-     *                    should match a file in the admin folder's "help_tabs" dir (ie..
-     *                    events/help_tabs/name_of_file_containing_content.help_tab.php)
-     *                    'callback' => 'callback_method_for_content', //if 'filename' isn't present then system will
-     *                    attempt to use the callback which should match the name of a method in the class
-     *                    ),
-     *                'tab2_id' => array(
-     *                    'title' => 'tab2 title',
-     *                    'filename' => 'file_name_2'
-     *                    'callback' => 'callback_method_for_content',
-     *                 ),
-     *            'help_sidebar' => 'callback_for_sidebar_content', //this is used for setting up the sidebar in the
-     *            help tab area on an admin page. @return void
-     *
-     * @abstract
-     */
-    abstract protected function _set_page_config();
-
-
-    /**
-     * _add_screen_options
-     * Child classes can add any extra wp_screen_options within this method using built-in WP functions/methods for
-     * doing so. Note child classes can also define _add_screen_options_($this->_current_view) to limit screen options
-     * to a particular view.
-     *
-     * @link   http://chrismarslender.com/wp-tutorials/wordpress-screen-options-tutorial/
-     *         see also WP_Screen object documents...
-     * @link   http://codex.wordpress.org/Class_Reference/WP_Screen
-     * @abstract
-     * @return void
-     */
-    abstract protected function _add_screen_options();
-
-
-    /**
-     * _add_feature_pointers
-     * Child classes should use this method for implementing any "feature pointers" (using built-in WP styling js).
-     * Note child classes can also define _add_feature_pointers_($this->_current_view) to limit screen options to a
-     * particular view. Note: this is just a placeholder for now.  Implementation will come down the road See:
-     * WP_Internal_Pointers class in wp-admin/includes/template.php for example (its a final class so can't be
-     * extended) also see:
-     *
-     * @link   http://eamann.com/tech/wordpress-portland/
-     * @abstract
-     * @return void
-     */
-    abstract protected function _add_feature_pointers();
-
-
-    /**
-     * load_scripts_styles
-     * child classes put their wp_enqueue_script and wp_enqueue_style hooks in here for anything they need loaded for
-     * their pages/subpages.  Note this is for all pages/subpages of the system.  You can also load only specific
-     * scripts/styles per view by putting them in a dynamic function in this format
-     * (load_scripts_styles_{$this->_current_view}) which matches your page route (action request arg)
-     *
-     * @abstract
-     * @return void
-     */
-    abstract public function load_scripts_styles();
-
-
-    /**
-     * admin_init
-     * Anything that should be set/executed at 'admin_init' WP hook runtime should be put in here.  This will apply to
-     * all pages/views loaded by child class.
-     *
-     * @abstract
-     * @return void
-     */
-    abstract public function admin_init();
-
-
-    /**
-     * admin_notices
-     * Anything triggered by the 'admin_notices' WP hook should be put in here.  This particular method will apply to
-     * all pages/views loaded by child class.
-     *
-     * @abstract
-     * @return void
-     */
-    abstract public function admin_notices();
-
-
-    /**
-     * admin_footer_scripts
-     * Anything triggered by the 'admin_print_footer_scripts' WP hook should be put in here. This particular method
-     * will apply to all pages/views loaded by child class.
-     *
-     * @return void
-     */
-    abstract public function admin_footer_scripts();
-
-
-    /**
-     * admin_footer
-     * anything triggered by the 'admin_footer' WP action hook should be added to here. This particular method will
-     * apply to all pages/views loaded by child class.
-     *
-     * @return void
-     */
-    public function admin_footer()
-    {
-    }
-
-
-    /**
-     * _global_ajax_hooks
-     * all global add_action('wp_ajax_{name_of_hook}') hooks in here.
-     * Note: within the ajax callback methods.
-     *
-     * @abstract
-     * @return void
-     */
-    protected function _global_ajax_hooks()
-    {
-        // for lazy loading of metabox content
-        add_action('wp_ajax_espresso-ajax-content', [$this, 'ajax_metabox_content'], 10);
-
-        add_action(
-            'wp_ajax_espresso_hide_status_change_notice',
-            [$this, 'hideStatusChangeNotice']
-        );
-        add_action(
-            'wp_ajax_nopriv_espresso_hide_status_change_notice',
-            [$this, 'hideStatusChangeNotice']
-        );
-    }
-
-
-    public function ajax_metabox_content()
-    {
-        $content_id  = $this->request->getRequestParam('contentid', '');
-        $content_url = $this->request->getRequestParam('contenturl', '', 'url');
-        EE_Admin_Page::cached_rss_display($content_id, $content_url);
-        wp_die();
-    }
-
-
-    public function hideStatusChangeNotice()
-    {
-        $response = [];
-        try {
-            /** @var StatusChangeNotice $status_change_notice */
-            $status_change_notice = $this->loader->getShared(
-                'EventEspresso\core\domain\services\admin\notices\status_change\StatusChangeNotice'
-            );
-            $response['success']  = $status_change_notice->dismiss() > -1;
-        } catch (Exception $exception) {
-            $response['errors'] = $exception->getMessage();
-        }
-        echo wp_json_encode($response);
-        exit();
-    }
-
-
-    /**
-     * allows extending classes do something specific before the parent constructor runs _page_setup().
-     *
-     * @return void
-     */
-    protected function _before_page_setup()
-    {
-        // default is to do nothing
-    }
-
-
-    /**
-     * Makes sure any things that need to be loaded early get handled.
-     * We also escape early here if the page requested doesn't match the object.
-     *
-     * @final
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    final protected function _page_setup()
-    {
-        // requires?
-        // admin_init stuff - global - we're setting this REALLY early
-        // so if EE_Admin pages have to hook into other WP pages they can.
-        // But keep in mind, not everything is available from the EE_Admin Page object at this point.
-        add_action('admin_init', [$this, 'admin_init_global'], 5);
-        // next verify if we need to load anything...
-        $this->_current_page = $this->request->getRequestParam('page', '', 'key');
-        $this->_current_page = $this->request->getRequestParam('current_page', $this->_current_page, 'key');
-        $this->page_folder   = strtolower(
-            str_replace(['_Admin_Page', 'Extend_'], '', $this->class_name)
-        );
-        global $ee_menu_slugs;
-        $ee_menu_slugs = (array) $ee_menu_slugs;
-        if (
-            ! $this->request->isAjax()
-            && (! $this->_current_page || ! isset($ee_menu_slugs[ $this->_current_page ]))
-        ) {
-            return;
-        }
-        // because WP List tables have two duplicate select inputs for choosing bulk actions,
-        // we need to copy the action from the second to the first
-        $action     = $this->request->getRequestParam('action', '-1', 'key');
-        $action2    = $this->request->getRequestParam('action2', '-1', 'key');
-        $action     = $action !== '-1' ? $action : $action2;
-        $req_action = $action !== '-1' ? $action : 'default';
-
-        // if a specific 'route' has been set, and the action is 'default' OR we are doing_ajax
-        // then let's use the route as the action.
-        // This covers cases where we're coming in from a list table that isn't on the default route.
-        $route             = $this->request->getRequestParam('route');
-        $this->_req_action = $route && ($req_action === 'default' || $this->request->isAjax())
-            ? $route
-            : $req_action;
-
-        $this->_current_view = $this->_req_action;
-        $this->_req_nonce    = $this->_req_action . '_nonce';
-        $this->_define_page_props();
-        $this->_current_page_view_url = add_query_arg(
-            ['page' => $this->_current_page, 'action' => $this->_current_view],
-            $this->_admin_base_url
-        );
-        // set page configs
-        $this->_set_page_routes();
-        $this->_set_page_config();
-        // let's include any referrer data in our default_query_args for this route for "stickiness".
-        if ($this->request->requestParamIsSet('wp_referer')) {
-            $wp_referer = $this->request->getRequestParam('wp_referer');
-            if ($wp_referer) {
-                $this->_default_route_query_args['wp_referer'] = $wp_referer;
-            }
-        }
-        // for CPT and other extended functionality.
-        // If there is an _extend_page_config_for_cpt
-        // then let's run that to modify all the various page configuration arrays.
-        if (method_exists($this, '_extend_page_config_for_cpt')) {
-            $this->_extend_page_config_for_cpt();
-        }
-        // filter routes and page_config so addons can add their stuff. Filtering done per class
-        $this->_page_routes = apply_filters(
-            'FHEE__' . $this->class_name . '__page_setup__page_routes',
-            $this->_page_routes,
-            $this
-        );
-        $this->_page_config = apply_filters(
-            'FHEE__' . $this->class_name . '__page_setup__page_config',
-            $this->_page_config,
-            $this
-        );
-        if ($this->base_class_name !== '') {
-            $this->_page_routes = apply_filters(
-                'FHEE__' . $this->base_class_name . '__page_setup__page_routes',
-                $this->_page_routes,
-                $this
-            );
-            $this->_page_config = apply_filters(
-                'FHEE__' . $this->base_class_name . '__page_setup__page_config',
-                $this->_page_config,
-                $this
-            );
-        }
-        // if AHEE__EE_Admin_Page__route_admin_request_$this->_current_view method is present
-        // then we call it hooked into the AHEE__EE_Admin_Page__route_admin_request action
-        if (method_exists($this, 'AHEE__EE_Admin_Page__route_admin_request_' . $this->_current_view)) {
-            add_action(
-                'AHEE__EE_Admin_Page__route_admin_request',
-                [$this, 'AHEE__EE_Admin_Page__route_admin_request_' . $this->_current_view],
-                10,
-                2
-            );
-        }
-        // next route only if routing enabled
-        if ($this->_routing && ! $this->request->isAjax()) {
-            $this->_verify_routes();
-            // next let's just check user_access and kill if no access
-            $this->check_user_access();
-            if ($this->_is_UI_request) {
-                // admin_init stuff - global, all views for this page class, specific view
-                add_action('admin_init', [$this, 'admin_init'], 10);
-                if (method_exists($this, 'admin_init_' . $this->_current_view)) {
-                    add_action('admin_init', [$this, 'admin_init_' . $this->_current_view], 15);
-                }
-            } else {
-                // hijack regular WP loading and route admin request immediately
-                @ini_set('memory_limit', apply_filters('admin_memory_limit', WP_MAX_MEMORY_LIMIT));
-                $this->route_admin_request();
-            }
-        }
-    }
-
-
-    /**
-     * Provides a way for related child admin pages to load stuff on the loaded admin page.
-     *
-     * @return void
-     * @throws EE_Error
-     */
-    private function _do_other_page_hooks()
-    {
-        $registered_pages = apply_filters('FHEE_do_other_page_hooks_' . $this->page_slug, []);
-        foreach ($registered_pages as $page) {
-            // now let's setup the file name and class that should be present
-            $classname = str_replace('.class.php', '', $page);
-            // autoloaders should take care of loading file
-            if (! class_exists($classname)) {
-                $error_msg[] = sprintf(
-                    esc_html__(
-                        'Something went wrong with loading the %s admin hooks page.',
-                        'event_espresso'
-                    ),
-                    $page
-                );
-                $error_msg[] = $error_msg[0]
-                               . "\r\n"
-                               . sprintf(
-                                   esc_html__(
-                                       'There is no class in place for the %1$s admin hooks page.%2$sMake sure you have %3$s defined. If this is a non-EE-core admin page then you also must have an autoloader in place for your class',
-                                       'event_espresso'
-                                   ),
-                                   $page,
-                                   '<br />',
-                                   '<strong>' . $classname . '</strong>'
-                               );
-                throw new EE_Error(implode('||', $error_msg));
-            }
-            // notice we are passing the instance of this class to the hook object.
-            $this->loader->getShared($classname, [$this]);
-        }
-    }
-
-
-    /**
-     * @throws ReflectionException
-     * @throws EE_Error
-     */
-    public function load_page_dependencies()
-    {
-        try {
-            $this->_load_page_dependencies();
-        } catch (EE_Error $e) {
-            $e->get_error();
-        }
-    }
-
-
-    /**
-     * load_page_dependencies
-     * loads things specific to this page class when its loaded.  Really helps with efficiency.
-     *
-     * @return void
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    protected function _load_page_dependencies()
-    {
-        // let's set the current_screen and screen options to override what WP set
-        $this->_current_screen = get_current_screen();
-        // load admin_notices - global, page class, and view specific
-        add_action('admin_notices', [$this, 'admin_notices_global'], 5);
-        add_action('admin_notices', [$this, 'admin_notices'], 10);
-        if (method_exists($this, 'admin_notices_' . $this->_current_view)) {
-            add_action('admin_notices', [$this, 'admin_notices_' . $this->_current_view], 15);
-        }
-        // load network admin_notices - global, page class, and view specific
-        add_action('network_admin_notices', [$this, 'network_admin_notices_global'], 5);
-        if (method_exists($this, 'network_admin_notices_' . $this->_current_view)) {
-            add_action('network_admin_notices', [$this, 'network_admin_notices_' . $this->_current_view]);
-        }
-        // this will save any per_page screen options if they are present
-        $this->_set_per_page_screen_options();
-        // setup list table properties
-        $this->_set_list_table();
-        // child classes can "register" a metabox to be automatically handled via the _page_config array property.
-        // However in some cases the metaboxes will need to be added within a route handling callback.
-        add_action('add_meta_boxes', [$this, 'addRegisteredMetaBoxes'], 99);
-        // hack because promos admin was loading the edited promotion object in the metaboxes callback
-        // which should NOT be generated on non-UI requests like POST updates/inserts
-        if (
-            $this->class_name === 'Promotions_Admin_Page'
-            && ($this->_req_action === 'edit' || $this->_req_action === 'create_new')
-        ) {
-            $this->addRegisteredMetaBoxes();
-        }
-        $this->_add_screen_columns();
-        // add screen options - global, page child class, and view specific
-        $this->_add_global_screen_options();
-        $this->_add_screen_options();
-        $add_screen_options = "_add_screen_options_{$this->_current_view}";
-        if (method_exists($this, $add_screen_options)) {
-            $this->{$add_screen_options}();
-        }
-        // add help tab(s) - set via page_config and qtips.
-        $this->_add_help_tabs();
-        $this->_add_qtips();
-        // add feature_pointers - global, page child class, and view specific
-        $this->_add_feature_pointers();
-        $this->_add_global_feature_pointers();
-        $add_feature_pointer = "_add_feature_pointer_{$this->_current_view}";
-        if (method_exists($this, $add_feature_pointer)) {
-            $this->{$add_feature_pointer}();
-        }
-        // enqueue scripts/styles - global, page class, and view specific
-        add_action('admin_enqueue_scripts', [$this, 'load_global_scripts_styles'], 5);
-        add_action('admin_enqueue_scripts', [$this, 'load_scripts_styles'], 10);
-        if (method_exists($this, "load_scripts_styles_{$this->_current_view}")) {
-            add_action('admin_enqueue_scripts', [$this, "load_scripts_styles_{$this->_current_view}"], 15);
-        }
-        add_action('admin_enqueue_scripts', [$this, 'admin_footer_scripts_eei18n_js_strings'], 100);
-        // admin_print_footer_scripts - global, page child class, and view specific.
-        // NOTE, despite the name, whenever possible, scripts should NOT be loaded using this.
-        // In most cases that's doing_it_wrong().  But adding hidden container elements etc.
-        // is a good use case. Notice the late priority we're giving these
-        add_action('admin_print_footer_scripts', [$this, 'admin_footer_scripts_global'], 99);
-        add_action('admin_print_footer_scripts', [$this, 'admin_footer_scripts'], 100);
-        if (method_exists($this, "admin_footer_scripts_{$this->_current_view}")) {
-            add_action('admin_print_footer_scripts', [$this, "admin_footer_scripts_{$this->_current_view}"], 101);
-        }
-        // admin footer scripts
-        add_action('admin_footer', [$this, 'admin_footer_global'], 99);
-        add_action('admin_footer', [$this, 'admin_footer'], 100);
-        if (method_exists($this, "admin_footer_{$this->_current_view}")) {
-            add_action('admin_footer', [$this, "admin_footer_{$this->_current_view}"], 101);
-        }
-        do_action('FHEE__EE_Admin_Page___load_page_dependencies__after_load', $this->page_slug);
-        // targeted hook
-        do_action(
-            "FHEE__EE_Admin_Page___load_page_dependencies__after_load__{$this->page_slug}__{$this->_req_action}"
-        );
-    }
-
-
-    /**
-     * _set_defaults
-     * This sets some global defaults for class properties.
-     */
-    private function _set_defaults()
-    {
-        $this->_current_screen       = $this->_admin_page_title = $this->_req_action = $this->_req_nonce = null;
-        $this->_event                = $this->_template_path = $this->_column_template_path = null;
-        $this->_nav_tabs             = $this->_views = $this->_page_routes = [];
-        $this->_page_config          = $this->_default_route_query_args = [];
-        $this->_default_nav_tab_name = 'overview';
-        // init template args
-        $this->set_template_args(
-            [
-                'admin_page_header'  => '',
-                'admin_page_content' => '',
-                'post_body_content'  => '',
-                'before_list_table'  => '',
-                'after_list_table'   => '',
-            ]
-        );
-    }
-
-
-    /**
-     * route_admin_request
-     *
-     * @return void
-     * @throws InvalidArgumentException
-     * @throws InvalidInterfaceException
-     * @throws InvalidDataTypeException
-     * @throws EE_Error
-     * @throws ReflectionException
-     * @see    _route_admin_request()
-     */
-    public function route_admin_request()
-    {
-        try {
-            $this->_route_admin_request();
-        } catch (EE_Error $e) {
-            $e->get_error();
-        }
-    }
-
-
-    public function set_wp_page_slug($wp_page_slug)
-    {
-        $this->_wp_page_slug = $wp_page_slug;
-        // if in network admin then we need to append "-network" to the page slug. Why? Because that's how WP rolls...
-        if (is_network_admin()) {
-            $this->_wp_page_slug .= '-network';
-        }
-    }
-
-
-    /**
-     * _verify_routes
-     * All this method does is verify the incoming request and make sure that routes exist for it.  We do this early so
-     * we know if we need to drop out.
-     *
-     * @return bool
-     * @throws EE_Error
-     */
-    protected function _verify_routes()
-    {
-        do_action('AHEE_log', __FILE__, __FUNCTION__, '');
-        if (! $this->_current_page && ! $this->request->isAjax()) {
-            return false;
-        }
-        $this->_route = false;
-        // check that the page_routes array is not empty
-        if (empty($this->_page_routes)) {
-            // user error msg
-            $error_msg = sprintf(
-                esc_html__('No page routes have been set for the %s admin page.', 'event_espresso'),
-                $this->_admin_page_title
-            );
-            // developer error msg
-            $error_msg .= '||' . $error_msg
-                          . esc_html__(
-                              ' Make sure the "set_page_routes()" method exists, and is setting the "_page_routes" array properly.',
-                              'event_espresso'
-                          );
-            throw new EE_Error($error_msg);
-        }
-        // and that the requested page route exists
-        if (array_key_exists($this->_req_action, $this->_page_routes)) {
-            $this->_route        = $this->_page_routes[ $this->_req_action ];
-            $this->_route_config = $this->_page_config[ $this->_req_action ] ?? [];
-        } else {
-            // user error msg
-            $error_msg = sprintf(
-                esc_html__(
-                    'The requested page route does not exist for the %s admin page.',
-                    'event_espresso'
-                ),
-                $this->_admin_page_title
-            );
-            // developer error msg
-            $error_msg .= '||' . $error_msg
-                          . sprintf(
-                              esc_html__(
-                                  ' Create a key in the "_page_routes" array named "%s" and set its value to the appropriate method.',
-                                  'event_espresso'
-                              ),
-                              $this->_req_action
-                          );
-            throw new EE_Error($error_msg);
-        }
-        // and that a default route exists
-        if (! array_key_exists('default', $this->_page_routes)) {
-            // user error msg
-            $error_msg = sprintf(
-                esc_html__(
-                    'A default page route has not been set for the % admin page.',
-                    'event_espresso'
-                ),
-                $this->_admin_page_title
-            );
-            // developer error msg
-            $error_msg .= '||' . $error_msg
-                          . esc_html__(
-                              ' Create a key in the "_page_routes" array named "default" and set its value to your default page method.',
-                              'event_espresso'
-                          );
-            throw new EE_Error($error_msg);
-        }
-
-        // first lets' catch if the UI request has EVER been set.
-        if ($this->_is_UI_request === null) {
-            // lets set if this is a UI request or not.
-            $this->_is_UI_request = ! $this->request->getRequestParam('noheader', false, 'bool');
-            // wait a minute... we might have a noheader in the route array
-            $this->_is_UI_request = ! (
-                is_array($this->_route) && isset($this->_route['noheader']) && $this->_route['noheader']
-            )
-                ? $this->_is_UI_request
-                : false;
-        }
-        $this->_set_current_labels();
-        return true;
-    }
-
-
-    /**
-     * this method simply verifies a given route and makes sure its an actual route available for the loaded page
-     *
-     * @param string $route the route name we're verifying
-     * @return bool we'll throw an exception if this isn't a valid route.
-     * @throws EE_Error
-     */
-    protected function _verify_route($route)
-    {
-        if (array_key_exists($this->_req_action, $this->_page_routes)) {
-            return true;
-        }
-        // user error msg
-        $error_msg = sprintf(
-            esc_html__('The given page route does not exist for the %s admin page.', 'event_espresso'),
-            $this->_admin_page_title
-        );
-        // developer error msg
-        $error_msg .= '||' . $error_msg
-                      . sprintf(
-                          esc_html__(
-                              ' Check the route you are using in your method (%s) and make sure it matches a route set in your "_page_routes" array property',
-                              'event_espresso'
-                          ),
-                          $route
-                      );
-        throw new EE_Error($error_msg);
-    }
-
-
-    /**
-     * perform nonce verification
-     * This method has be encapsulated here so that any ajax requests that bypass normal routes can verify their nonces
-     * using this method (and save retyping!)
-     *
-     * @param string $nonce     The nonce sent
-     * @param string $nonce_ref The nonce reference string (name0)
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    protected function _verify_nonce($nonce, $nonce_ref)
-    {
-        // verify nonce against expected value
-        if (! wp_verify_nonce($nonce, $nonce_ref)) {
-            // these are not the droids you are looking for !!!
-            $msg = sprintf(
-                esc_html__('%sNonce Fail.%s', 'event_espresso'),
-                '<a href="https://www.youtube.com/watch?v=56_S0WeTkzs">',
-                '</a>'
-            );
-            if (WP_DEBUG) {
-                $msg .= "\n  ";
-                $msg .= sprintf(
-                    esc_html__(
-                        'In order to dynamically generate nonces for your actions, use the %s::add_query_args_and_nonce() method. May the Nonce be with you!',
-                        'event_espresso'
-                    ),
-                    __CLASS__
-                );
-            }
-            if (! $this->request->isAjax()) {
-                wp_die($msg);
-            }
-            EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
-            $this->_return_json();
-        }
-    }
-
-
-    /**
-     * _route_admin_request()
-     * Meat and potatoes of the class.  Basically, this dude checks out what's being requested and sees if there are
-     * some doodads to work the magic and handle the flingjangy. Translation:  Checks if the requested action is listed
-     * in the page routes and then will try to load the corresponding method.
-     *
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    protected function _route_admin_request()
-    {
-        if (! $this->_is_UI_request) {
-            $this->_verify_routes();
-        }
-        $nonce_check = ! isset($this->_route_config['require_nonce']) || $this->_route_config['require_nonce'];
-        if ($this->_req_action !== 'default' && $nonce_check) {
-            // set nonce from post data
-            $nonce = $this->request->getRequestParam($this->_req_nonce, '');
-            $this->_verify_nonce($nonce, $this->_req_nonce);
-        }
-        // set the nav_tabs array but ONLY if this is  UI_request
-        if ($this->_is_UI_request) {
-            $this->_set_nav_tabs();
-        }
-        // grab callback function
-        $func = is_array($this->_route) && isset($this->_route['func'])
-            ? $this->_route['func']
-            : $this->_route;
-        // check if callback has args
-        $args = is_array($this->_route) && isset($this->_route['args']) ? $this->_route['args'] : [];
-        // action right before calling route
-        // (hook is something like 'AHEE__Registrations_Admin_Page__route_admin_request')
-        if (! did_action('AHEE__EE_Admin_Page__route_admin_request')) {
-            do_action('AHEE__EE_Admin_Page__route_admin_request', $this->_current_view, $this);
-        }
-        // strip _wp_http_referer from the server REQUEST_URI
-        // else it grows in length on every submission due to recursion,
-        // ultimately causing a "Request-URI Too Large" error
-        $this->request->unSetRequestParam('_wp_http_referer');
-        $this->request->unSetServerParam('_wp_http_referer');
-        $cleaner_request_uri = remove_query_arg(
-            '_wp_http_referer',
-            wp_unslash($this->request->getServerParam('REQUEST_URI'))
-        );
-        $this->request->setRequestParam('_wp_http_referer', $cleaner_request_uri, true);
-        $this->request->setServerParam('REQUEST_URI', $cleaner_request_uri, true);
-        $route_callback = [];
-        if (! empty($func)) {
-            if (is_array($func)) {
-                $route_callback = $func;
-            } elseif (is_string($func)) {
-                if (strpos($func, '::') !== false) {
-                    $route_callback = explode('::', $func);
-                } elseif (method_exists($this, $func)) {
-                    $route_callback = [$this, $func];
-                } else {
-                    $route_callback = $func;
-                }
-            }
-            [$class, $method] = $route_callback;
-            // is it neither a class method NOR a standalone function?
-            if (! is_callable($route_callback)) {
-                // user error msg
-                $error_msg = esc_html__(
-                    'An error occurred. The  requested page route could not be found.',
-                    'event_espresso'
-                );
-                // developer error msg
-                $error_msg .= '||';
-                $error_msg .= sprintf(
-                    esc_html__(
-                        'Page route "%s" could not be called. Check that the spelling for method names and actions in the "_page_routes" array are all correct.',
-                        'event_espresso'
-                    ),
-                    $method
-                );
-                throw new DomainException($error_msg);
-            }
-            if ($class !== $this && ! in_array($this, $args)) {
-                // send along this admin page object for access by addons.
-                $args['admin_page'] = $this;
-            }
-
-            try {
-                call_user_func_array($route_callback, $args);
-            } catch (Throwable $throwable) {
-                $arg_keys = array_keys($args);
-                $nice_args = [];
-                foreach ($args as $key => $arg) {
-                    $nice_args[ $key ] = is_object($arg) ? get_class($arg) : $arg_keys[ $key ];
-                }
-                new ExceptionStackTraceDisplay(
-                        new RuntimeException(
-                            sprintf(
-                                esc_html__(
-                                    'Page route "%1$s" with the supplied arguments (%2$s) threw the following exception: %3$s',
-                                    'event_espresso'
-                                ),
-                                $method,
-                                implode(', ', $nice_args),
-                                $throwable->getMessage()
-                            ),
-                            $throwable->getCode(),
-                            $throwable
-                        )
-                );
-            }
-        }
-        // if we've routed and this route has a no headers route AND a sent_headers_route,
-        // then we need to reset the routing properties to the new route.
-        // now if UI request is FALSE and noheader is true AND we have a headers_sent_route in the route array then let's set UI_request to true because the no header route has a second func after headers have been sent.
-        if (
-            $this->_is_UI_request === false
-            && is_array($this->_route)
-            && ! empty($this->_route['headers_sent_route'])
-        ) {
-            $this->_reset_routing_properties($this->_route['headers_sent_route']);
-        }
-    }
-
-
-    /**
-     * This method just allows the resetting of page properties in the case where a no headers
-     * route redirects to a headers route in its route config.
-     *
-     * @param string $new_route New (non header) route to redirect to.
-     * @return   void
-     * @throws ReflectionException
-     * @throws InvalidArgumentException
-     * @throws InvalidInterfaceException
-     * @throws InvalidDataTypeException
-     * @throws EE_Error
-     * @since   4.3.0
-     */
-    protected function _reset_routing_properties($new_route)
-    {
-        $this->_is_UI_request = true;
-        // now we set the current route to whatever the headers_sent_route is set at
-        $this->request->setRequestParam('action', $new_route);
-        // rerun page setup
-        $this->_page_setup();
-    }
-
-
-    /**
-     * _add_query_arg
-     * adds nonce to array of arguments then calls WP add_query_arg function
-     *(internally just uses EEH_URL's function with the same name)
-     *
-     * @param array  $args
-     * @param string $url
-     * @param bool   $sticky                  if true, then the existing Request params will be appended to the
-     *                                        generated url in an associative array indexed by the key 'wp_referer';
-     *                                        Example usage: If the current page is:
-     *                                        http://mydomain.com/wp-admin/admin.php?page=espresso_registrations
-     *                                        &action=default&event_id=20&month_range=March%202015
-     *                                        &_wpnonce=5467821
-     *                                        and you call:
-     *                                        EE_Admin_Page::add_query_args_and_nonce(
-     *                                        array(
-     *                                        'action' => 'resend_something',
-     *                                        'page=>espresso_registrations'
-     *                                        ),
-     *                                        $some_url,
-     *                                        true
-     *                                        );
-     *                                        It will produce a url in this structure:
-     *                                        http://{$some_url}/?page=espresso_registrations&action=resend_something
-     *                                        &wp_referer[action]=default&wp_referer[event_id]=20&wpreferer[
-     *                                        month_range]=March%202015
-     * @param bool   $exclude_nonce           If true, the the nonce will be excluded from the generated nonce.
-     * @param int    $context
-     * @return string
-     */
-    public static function add_query_args_and_nonce(
-        $args = [],
-        $url = '',
-        $sticky = false,
-        $exclude_nonce = false,
-        int $context = EEH_URL::CONTEXT_NONE
-    ) {
-        // if there is a _wp_http_referer include the values from the request but only if sticky = true
-        if ($sticky) {
-            /** @var RequestInterface $request */
-            $request = LoaderFactory::getLoader()->getShared(RequestInterface::class);
-            $request->unSetRequestParams(['_wp_http_referer', 'wp_referer'], true);
-            $request->unSetServerParam('_wp_http_referer', true);
-            foreach ($request->requestParams() as $key => $value) {
-                // do not add nonces
-                if (strpos($key, 'nonce') !== false) {
-                    continue;
-                }
-                $args[ 'wp_referer[' . $key . ']' ] = is_string($value) ? htmlspecialchars($value) : $value;
-            }
-        }
-        return EEH_URL::add_query_args_and_nonce($args, $url, $exclude_nonce, $context);
-    }
-
-
-    /**
-     * This returns a generated link that will load the related help tab.
-     *
-     * @param string $help_tab_id the id for the connected help tab
-     * @param string $icon_style  (optional) include css class for the style you want to use for the help icon.
-     * @param string $help_text   (optional) send help text you want to use for the link if default not to be used
-     * @return string              generated link
-     * @uses EEH_Template::get_help_tab_link()
-     */
-    protected function _get_help_tab_link($help_tab_id, $icon_style = '', $help_text = '')
-    {
-        return EEH_Template::get_help_tab_link(
-            $help_tab_id,
-            $this->page_slug,
-            $this->_req_action,
-            $icon_style,
-            $help_text
-        );
-    }
-
-
-    /**
-     * _add_help_tabs
-     * Note child classes define their help tabs within the page_config array.
-     *
-     * @link   http://codex.wordpress.org/Function_Reference/add_help_tab
-     * @return void
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    protected function _add_help_tabs()
-    {
-        if (isset($this->_page_config[ $this->_req_action ])) {
-            $config = $this->_page_config[ $this->_req_action ];
-            // let's see if there is a help_sidebar set for the current route and we'll set that up for usage as well.
-            if (is_array($config) && isset($config['help_sidebar'])) {
-                // check that the callback given is valid
-                if (! method_exists($this, $config['help_sidebar'])) {
-                    throw new EE_Error(
-                        sprintf(
-                            esc_html__(
-                                'The _page_config array has a callback set for the "help_sidebar" option.  However the callback given (%s) is not a valid callback.  Doublecheck the spelling and make sure this method exists for the class %s',
-                                'event_espresso'
-                            ),
-                            $config['help_sidebar'],
-                            $this->class_name
-                        )
-                    );
-                }
-                $content = apply_filters(
-                    'FHEE__' . $this->class_name . '__add_help_tabs__help_sidebar',
-                    $this->{$config['help_sidebar']}()
-                );
-                $this->_current_screen->set_help_sidebar($content);
-            }
-            if (! isset($config['help_tabs'])) {
-                return;
-            } //no help tabs for this route
-            foreach ((array) $config['help_tabs'] as $tab_id => $cfg) {
-                // we're here so there ARE help tabs!
-                // make sure we've got what we need
-                if (! isset($cfg['title'])) {
-                    throw new EE_Error(
-                        esc_html__(
-                            'The _page_config array is not set up properly for help tabs.  It is missing a title',
-                            'event_espresso'
-                        )
-                    );
-                }
-                if (! isset($cfg['filename']) && ! isset($cfg['callback']) && ! isset($cfg['content'])) {
-                    throw new EE_Error(
-                        esc_html__(
-                            'The _page_config array is not setup properly for help tabs. It is missing a either a filename reference, or a callback reference or a content reference so there is no way to know the content for the help tab',
-                            'event_espresso'
-                        )
-                    );
-                }
-                // first priority goes to content.
-                if (! empty($cfg['content'])) {
-                    $content = ! empty($cfg['content']) ? $cfg['content'] : null;
-                    // second priority goes to filename
-                } elseif (! empty($cfg['filename'])) {
-                    $file_path = $this->_get_dir() . '/help_tabs/' . $cfg['filename'] . '.help_tab.php';
-                    // it's possible that the file is located on decaf route (and above sets up for caf route, if this is the case then lets check decaf route too)
-                    $file_path = ! is_readable($file_path) ? EE_ADMIN_PAGES
-                                                             . basename($this->_get_dir())
-                                                             . '/help_tabs/'
-                                                             . $cfg['filename']
-                                                             . '.help_tab.php' : $file_path;
-                    // if file is STILL not readable then let's do a EE_Error so its more graceful than a fatal error.
-                    if (! isset($cfg['callback']) && ! is_readable($file_path)) {
-                        EE_Error::add_error(
-                            sprintf(
-                                esc_html__(
-                                    'The filename given for the help tab %s is not a valid file and there is no other configuration for the tab content.  Please check that the string you set for the help tab on this route (%s) is the correct spelling.  The file should be in %s',
-                                    'event_espresso'
-                                ),
-                                $tab_id,
-                                key($config),
-                                $file_path
-                            ),
-                            __FILE__,
-                            __FUNCTION__,
-                            __LINE__
-                        );
-                        return;
-                    }
-                    $template_args['admin_page_obj'] = $this;
-                    $content                         = EEH_Template::display_template(
-                        $file_path,
-                        $template_args,
-                        true
-                    );
-                } else {
-                    $content = '';
-                }
-                // check if callback is valid
-                if (
-                    empty($content)
-                    && (
-                        ! isset($cfg['callback']) || ! method_exists($this, $cfg['callback'])
-                    )
-                ) {
-                    EE_Error::add_error(
-                        sprintf(
-                            esc_html__(
-                                'The callback given for a %s help tab on this page does not content OR a corresponding method for generating the content.  Check the spelling or make sure the method is present.',
-                                'event_espresso'
-                            ),
-                            $cfg['title']
-                        ),
-                        __FILE__,
-                        __FUNCTION__,
-                        __LINE__
-                    );
-                    return;
-                }
-                // setup config array for help tab method
-                $id  = $this->page_slug . '-' . $this->_req_action . '-' . $tab_id;
-                $_ht = [
-                    'id'       => $id,
-                    'title'    => $cfg['title'],
-                    'callback' => isset($cfg['callback']) && empty($content) ? [$this, $cfg['callback']] : null,
-                    'content'  => $content,
-                ];
-                $this->_current_screen->add_help_tab($_ht);
-            }
-        }
-    }
-
-
-    /**
-     * This simply sets up any qtips that have been defined in the page config
-     *
-     * @return void
-     * @throws ReflectionException
-     * @throws EE_Error
-     */
-    protected function _add_qtips()
-    {
-        if (isset($this->_route_config['qtips'])) {
-            $qtips = (array) $this->_route_config['qtips'];
-            // load qtip loader
-            $path = [
-                $this->_get_dir() . '/qtips/',
-                EE_ADMIN_PAGES . basename($this->_get_dir()) . '/qtips/',
-            ];
-            EEH_Qtip_Loader::instance()->register($qtips, $path);
-        }
-    }
-
-
-    /**
-     * _set_nav_tabs
-     * This sets up the nav tabs from the page_routes array.  This method can be overwritten by child classes if you
-     * wish to add additional tabs or modify accordingly.
-     *
-     * @return void
-     * @throws InvalidArgumentException
-     * @throws InvalidInterfaceException
-     * @throws InvalidDataTypeException
-     */
-    protected function _set_nav_tabs()
-    {
-        $i        = 0;
-        $only_tab = count($this->_page_config) < 2;
-        foreach ($this->_page_config as $slug => $config) {
-            if (! is_array($config) || empty($config['nav'])) {
-                continue;
-            }
-            // no nav tab for this config
-            // check for persistent flag
-            if ($slug !== $this->_req_action && isset($config['nav']['persistent']) && ! $config['nav']['persistent']) {
-                // nav tab is only to appear when route requested.
-                continue;
-            }
-            if (! $this->check_user_access($slug, true)) {
-                // no nav tab because current user does not have access.
-                continue;
-            }
-            $css_class = $config['css_class'] ?? '';
-            $css_class .= $only_tab ? ' ee-only-tab' : '';
-            $css_class .= " ee-nav-tab__$slug";
-
-            $this->_nav_tabs[ $slug ] = [
-                'url'       => $config['nav']['url'] ?? EE_Admin_Page::add_query_args_and_nonce(
-                        ['action' => $slug],
-                        $this->_admin_base_url
-                    ),
-                'link_text' => $this->navTabLabel($config['nav'], $slug),
-                'css_class' => $this->_req_action === $slug ? $css_class . ' nav-tab-active' : $css_class,
-                'order'     => $config['nav']['order'] ?? $i,
-            ];
-            $i++;
-        }
-        // if $this->_nav_tabs is empty then lets set the default
-        if (empty($this->_nav_tabs)) {
-            $this->_nav_tabs[ $this->_default_nav_tab_name ] = [
-                'url'       => $this->_admin_base_url,
-                'link_text' => ucwords(str_replace('_', ' ', $this->_default_nav_tab_name)),
-                'css_class' => 'nav-tab-active',
-                'order'     => 10,
-            ];
-        }
-        // now let's sort the tabs according to order
-        usort($this->_nav_tabs, [$this, '_sort_nav_tabs']);
-    }
-
-
-    private function navTabLabel(array $nav_tab, string $slug): string
-    {
-        $label = $nav_tab['label'] ?? ucwords(str_replace('_', ' ', $slug));
-        $icon  = $nav_tab['icon'] ?? null;
-        $icon  = $icon ? '<span class="dashicons ' . $icon . '"></span>' : '';
-        return '
+	/**
+	 * unprocessed value for the 'page' request param (default '')
+	 *
+	 * @var string
+	 */
+	protected $raw_req_page = '';
+
+	/**
+	 * sanitized request action (and nonce)
+	 *
+	 * @var string
+	 */
+	protected $_req_action = '';
+
+	/**
+	 * sanitized request action nonce
+	 *
+	 * @var string
+	 */
+	protected $_req_nonce = '';
+
+	/**
+	 * @var string
+	 */
+	protected $_search_btn_label = '';
+
+	/**
+	 * @var string
+	 */
+	protected $_search_box_callback = '';
+
+	/**
+	 * @var WP_Screen
+	 */
+	protected $_current_screen;
+
+	// for holding EE_Admin_Hooks object when needed (set via set_hook_object())
+	protected $_hook_obj;
+
+	// for holding incoming request data
+	protected $_req_data = [];
+
+	// yes / no array for admin form fields
+	protected $_yes_no_values = [];
+
+	// some default things shared by all child classes
+	protected $_default_espresso_metaboxes = [
+		'_espresso_news_post_box',
+		'_espresso_links_post_box',
+		'_espresso_ratings_request',
+		'_espresso_sponsors_post_box',
+	];
+
+	/**
+	 * @var EE_Registry
+	 */
+	protected $EE;
+
+
+	/**
+	 * This is just a property that flags whether the given route is a caffeinated route or not.
+	 *
+	 * @var boolean
+	 */
+	protected $_is_caf = false;
+
+	/**
+	 * whether or not initializePage() has run
+	 *
+	 * @var boolean
+	 */
+	protected $initialized = false;
+
+	/**
+	 * @var FeatureFlags
+	 */
+	protected $feature;
+
+
+	/**
+	 * @var string
+	 */
+	protected $class_name;
+
+	/**
+	 * if the current class is an admin page extension, like: Extend_Events_Admin_Page,
+	 * then this would be the parent classname: Events_Admin_Page
+	 *
+	 * @var string
+	 */
+	protected $base_class_name;
+
+	/**
+	 * @var array
+	 * @since 5.0.0.p
+	 */
+	private $publish_post_meta_box_hidden_fields = [];
+
+
+	/**
+	 * @Constructor
+	 * @param bool $routing indicate whether we want to just load the object and handle routing or just load the object.
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function __construct($routing = true)
+	{
+		$this->loader       = LoaderFactory::getLoader();
+		$this->admin_config = $this->loader->getShared('EE_Admin_Config');
+		$this->feature      = $this->loader->getShared(FeatureFlags::class);
+		$this->request      = $this->loader->getShared(RequestInterface::class);
+		// routing enabled?
+		$this->_routing = $routing;
+
+		$this->class_name      = get_class($this);
+		$this->base_class_name = strpos($this->class_name, 'Extend_') === 0
+			? str_replace('Extend_', '', $this->class_name)
+			: '';
+
+		if (strpos($this->_get_dir(), 'caffeinated') !== false) {
+			$this->_is_caf = true;
+		}
+		$this->_yes_no_values = [
+			['id' => true, 'text' => esc_html__('Yes', 'event_espresso')],
+			['id' => false, 'text' => esc_html__('No', 'event_espresso')],
+		];
+		// set the _req_data property.
+		$this->_req_data = $this->request->requestParams();
+	}
+
+
+	/**
+	 * @return EE_Admin_Config
+	 */
+	public function adminConfig(): EE_Admin_Config
+	{
+		return $this->admin_config;
+	}
+
+
+	/**
+	 * @return FeatureFlags
+	 */
+	public function feature(): FeatureFlags
+	{
+		return $this->feature;
+	}
+
+
+	/**
+	 * This logic used to be in the constructor, but that caused a chicken <--> egg scenario
+	 * for child classes that needed to set properties prior to these methods getting called,
+	 * but also needed the parent class to have its construction completed as well.
+	 * Bottom line is that constructors should ONLY be used for setting initial properties
+	 * and any complex initialization logic should only run after instantiation is complete.
+	 *
+	 * This method gets called immediately after construction from within
+	 *      EE_Admin_Page_Init::_initialize_admin_page()
+	 *
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @since 5.0.0.p
+	 */
+	public function initializePage()
+	{
+		if ($this->initialized) {
+			return;
+		}
+		// set initial page props (child method)
+		$this->_init_page_props();
+		// set global defaults
+		$this->_set_defaults();
+		// set early because incoming requests could be ajax related and we need to register those hooks.
+		$this->_global_ajax_hooks();
+		$this->_ajax_hooks();
+		// other_page_hooks have to be early too.
+		$this->_do_other_page_hooks();
+		// set up page dependencies
+		$this->_before_page_setup();
+		$this->_page_setup();
+		$this->initialized = true;
+	}
+
+
+	/**
+	 * _init_page_props
+	 * Child classes use to set at least the following properties:
+	 * $page_slug.
+	 * $page_label.
+	 *
+	 * @abstract
+	 * @return void
+	 */
+	abstract protected function _init_page_props();
+
+
+	/**
+	 * _ajax_hooks
+	 * child classes put all their add_action('wp_ajax_{name_of_hook}') hooks in here.
+	 * Note: within the ajax callback methods.
+	 *
+	 * @abstract
+	 * @return void
+	 */
+	abstract protected function _ajax_hooks();
+
+
+	/**
+	 * _define_page_props
+	 * child classes define page properties in here.  Must include at least:
+	 * $_admin_base_url = base_url for all admin pages
+	 * $_admin_page_title = default admin_page_title for admin pages
+	 * $_labels = array of default labels for various automatically generated elements:
+	 *    array(
+	 *        'buttons' => array(
+	 *            'add' => esc_html__('label for add new button'),
+	 *            'edit' => esc_html__('label for edit button'),
+	 *            'delete' => esc_html__('label for delete button')
+	 *            )
+	 *        )
+	 *
+	 * @abstract
+	 * @return void
+	 */
+	abstract protected function _define_page_props();
+
+
+	/**
+	 * _set_page_routes
+	 * child classes use this to define the page routes for all subpages handled by the class.  Page routes are
+	 * assigned to a action => method pairs in an array and to the $_page_routes property.  Each page route must also
+	 * have a 'default' route. Here's the format
+	 * $this->_page_routes = array(
+	 *        'default' => array(
+	 *            'func' => '_default_method_handling_route',
+	 *            'args' => array('array','of','args'),
+	 *            'noheader' => true, //add this in if this page route is processed before any headers are loaded (i.e.
+	 *            ajax request, backend processing)
+	 *            'headers_sent_route'=>'headers_route_reference', //add this if noheader=>true, and you want to load a
+	 *            headers route after.  The string you enter here should match the defined route reference for a
+	 *            headers sent route.
+	 *            'capability' => 'route_capability', //indicate a string for minimum capability required to access
+	 *            this route.
+	 *            'obj_id' => 10 // if this route has an object id, then this can include it (used for capability
+	 *            checks).
+	 *        ),
+	 *        'insert_item' => '_method_for_handling_insert_item' //this can be used if all we need to have is a
+	 *        handling method.
+	 *        )
+	 * )
+	 *
+	 * @abstract
+	 * @return void
+	 */
+	abstract protected function _set_page_routes();
+
+
+	/**
+	 * _set_page_config
+	 * child classes use this to define the _page_config array for all subpages handled by the class. Each key in the
+	 * array corresponds to the page_route for the loaded page. Format:
+	 * $this->_page_config = array(
+	 *        'default' => array(
+	 *            'labels' => array(
+	 *                'buttons' => array(
+	 *                    'add' => esc_html__('label for adding item'),
+	 *                    'edit' => esc_html__('label for editing item'),
+	 *                    'delete' => esc_html__('label for deleting item')
+	 *                ),
+	 *                'publishbox' => esc_html__('Localized Title for Publish metabox', 'event_espresso')
+	 *            ), //optional an array of custom labels for various automatically generated elements to use on the
+	 *            page. If this isn't present then the defaults will be used as set for the $this->_labels in
+	 *            _define_page_props() method
+	 *            'nav' => array(
+	 *                'label' => esc_html__('Label for Tab', 'event_espresso').
+	 *                'url' => 'http://someurl', //automatically generated UNLESS you define
+	 *                'css_class' => 'css-class', //automatically generated UNLESS you define
+	 *                'order' => 10, //required to indicate tab position.
+	 *                'persistent' => false //if you want the nav tab to ONLY display when the specific route is
+	 *                displayed then add this parameter.
+	 *            'list_table' => 'name_of_list_table' //string for list table class to be loaded for this admin_page.
+	 *            'metaboxes' => array('metabox1', 'metabox2'), //if present this key indicates we want to load
+	 *            metaboxes set for eventespresso admin pages.
+	 *            'has_metaboxes' => true, //this boolean flag can simply be used to indicate if the route will have
+	 *            metaboxes.  Typically this is used if the 'metaboxes' index is not used because metaboxes are added
+	 *            later.  We just use this flag to make sure the necessary js gets enqueued on page load.
+	 *            'has_help_popups' => false //defaults(true) //this boolean flag can simply be used to indicate if the
+	 *            given route has help popups setup and if it does then we need to make sure thickbox is enqueued.
+	 *            'columns' => array(4, 2), //this key triggers the setup of a page that uses columns (metaboxes).  The
+	 *            array indicates the max number of columns (4) and the default number of columns on page load (2).
+	 *            There is an option in the "screen_options" dropdown that is setup so users can pick what columns they
+	 *            want to display.
+	 *            'help_tabs' => array( //this is used for adding help tabs to a page
+	 *                'tab_id' => array(
+	 *                    'title' => 'tab_title',
+	 *                    'filename' => 'name_of_file_containing_content', //this is the primary method for setting
+	 *                    help tab content.  The fallback if it isn't present is to try a the callback.  Filename
+	 *                    should match a file in the admin folder's "help_tabs" dir (ie..
+	 *                    events/help_tabs/name_of_file_containing_content.help_tab.php)
+	 *                    'callback' => 'callback_method_for_content', //if 'filename' isn't present then system will
+	 *                    attempt to use the callback which should match the name of a method in the class
+	 *                    ),
+	 *                'tab2_id' => array(
+	 *                    'title' => 'tab2 title',
+	 *                    'filename' => 'file_name_2'
+	 *                    'callback' => 'callback_method_for_content',
+	 *                 ),
+	 *            'help_sidebar' => 'callback_for_sidebar_content', //this is used for setting up the sidebar in the
+	 *            help tab area on an admin page. @return void
+	 *
+	 * @abstract
+	 */
+	abstract protected function _set_page_config();
+
+
+	/**
+	 * _add_screen_options
+	 * Child classes can add any extra wp_screen_options within this method using built-in WP functions/methods for
+	 * doing so. Note child classes can also define _add_screen_options_($this->_current_view) to limit screen options
+	 * to a particular view.
+	 *
+	 * @link   http://chrismarslender.com/wp-tutorials/wordpress-screen-options-tutorial/
+	 *         see also WP_Screen object documents...
+	 * @link   http://codex.wordpress.org/Class_Reference/WP_Screen
+	 * @abstract
+	 * @return void
+	 */
+	abstract protected function _add_screen_options();
+
+
+	/**
+	 * _add_feature_pointers
+	 * Child classes should use this method for implementing any "feature pointers" (using built-in WP styling js).
+	 * Note child classes can also define _add_feature_pointers_($this->_current_view) to limit screen options to a
+	 * particular view. Note: this is just a placeholder for now.  Implementation will come down the road See:
+	 * WP_Internal_Pointers class in wp-admin/includes/template.php for example (its a final class so can't be
+	 * extended) also see:
+	 *
+	 * @link   http://eamann.com/tech/wordpress-portland/
+	 * @abstract
+	 * @return void
+	 */
+	abstract protected function _add_feature_pointers();
+
+
+	/**
+	 * load_scripts_styles
+	 * child classes put their wp_enqueue_script and wp_enqueue_style hooks in here for anything they need loaded for
+	 * their pages/subpages.  Note this is for all pages/subpages of the system.  You can also load only specific
+	 * scripts/styles per view by putting them in a dynamic function in this format
+	 * (load_scripts_styles_{$this->_current_view}) which matches your page route (action request arg)
+	 *
+	 * @abstract
+	 * @return void
+	 */
+	abstract public function load_scripts_styles();
+
+
+	/**
+	 * admin_init
+	 * Anything that should be set/executed at 'admin_init' WP hook runtime should be put in here.  This will apply to
+	 * all pages/views loaded by child class.
+	 *
+	 * @abstract
+	 * @return void
+	 */
+	abstract public function admin_init();
+
+
+	/**
+	 * admin_notices
+	 * Anything triggered by the 'admin_notices' WP hook should be put in here.  This particular method will apply to
+	 * all pages/views loaded by child class.
+	 *
+	 * @abstract
+	 * @return void
+	 */
+	abstract public function admin_notices();
+
+
+	/**
+	 * admin_footer_scripts
+	 * Anything triggered by the 'admin_print_footer_scripts' WP hook should be put in here. This particular method
+	 * will apply to all pages/views loaded by child class.
+	 *
+	 * @return void
+	 */
+	abstract public function admin_footer_scripts();
+
+
+	/**
+	 * admin_footer
+	 * anything triggered by the 'admin_footer' WP action hook should be added to here. This particular method will
+	 * apply to all pages/views loaded by child class.
+	 *
+	 * @return void
+	 */
+	public function admin_footer()
+	{
+	}
+
+
+	/**
+	 * _global_ajax_hooks
+	 * all global add_action('wp_ajax_{name_of_hook}') hooks in here.
+	 * Note: within the ajax callback methods.
+	 *
+	 * @abstract
+	 * @return void
+	 */
+	protected function _global_ajax_hooks()
+	{
+		// for lazy loading of metabox content
+		add_action('wp_ajax_espresso-ajax-content', [$this, 'ajax_metabox_content'], 10);
+
+		add_action(
+			'wp_ajax_espresso_hide_status_change_notice',
+			[$this, 'hideStatusChangeNotice']
+		);
+		add_action(
+			'wp_ajax_nopriv_espresso_hide_status_change_notice',
+			[$this, 'hideStatusChangeNotice']
+		);
+	}
+
+
+	public function ajax_metabox_content()
+	{
+		$content_id  = $this->request->getRequestParam('contentid', '');
+		$content_url = $this->request->getRequestParam('contenturl', '', 'url');
+		EE_Admin_Page::cached_rss_display($content_id, $content_url);
+		wp_die();
+	}
+
+
+	public function hideStatusChangeNotice()
+	{
+		$response = [];
+		try {
+			/** @var StatusChangeNotice $status_change_notice */
+			$status_change_notice = $this->loader->getShared(
+				'EventEspresso\core\domain\services\admin\notices\status_change\StatusChangeNotice'
+			);
+			$response['success']  = $status_change_notice->dismiss() > -1;
+		} catch (Exception $exception) {
+			$response['errors'] = $exception->getMessage();
+		}
+		echo wp_json_encode($response);
+		exit();
+	}
+
+
+	/**
+	 * allows extending classes do something specific before the parent constructor runs _page_setup().
+	 *
+	 * @return void
+	 */
+	protected function _before_page_setup()
+	{
+		// default is to do nothing
+	}
+
+
+	/**
+	 * Makes sure any things that need to be loaded early get handled.
+	 * We also escape early here if the page requested doesn't match the object.
+	 *
+	 * @final
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	final protected function _page_setup()
+	{
+		// requires?
+		// admin_init stuff - global - we're setting this REALLY early
+		// so if EE_Admin pages have to hook into other WP pages they can.
+		// But keep in mind, not everything is available from the EE_Admin Page object at this point.
+		add_action('admin_init', [$this, 'admin_init_global'], 5);
+		// next verify if we need to load anything...
+		$this->_current_page = $this->request->getRequestParam('page', '', 'key');
+		$this->_current_page = $this->request->getRequestParam('current_page', $this->_current_page, 'key');
+		$this->page_folder   = strtolower(
+			str_replace(['_Admin_Page', 'Extend_'], '', $this->class_name)
+		);
+		global $ee_menu_slugs;
+		$ee_menu_slugs = (array) $ee_menu_slugs;
+		if (
+			! $this->request->isAjax()
+			&& (! $this->_current_page || ! isset($ee_menu_slugs[ $this->_current_page ]))
+		) {
+			return;
+		}
+		// because WP List tables have two duplicate select inputs for choosing bulk actions,
+		// we need to copy the action from the second to the first
+		$action     = $this->request->getRequestParam('action', '-1', 'key');
+		$action2    = $this->request->getRequestParam('action2', '-1', 'key');
+		$action     = $action !== '-1' ? $action : $action2;
+		$req_action = $action !== '-1' ? $action : 'default';
+
+		// if a specific 'route' has been set, and the action is 'default' OR we are doing_ajax
+		// then let's use the route as the action.
+		// This covers cases where we're coming in from a list table that isn't on the default route.
+		$route             = $this->request->getRequestParam('route');
+		$this->_req_action = $route && ($req_action === 'default' || $this->request->isAjax())
+			? $route
+			: $req_action;
+
+		$this->_current_view = $this->_req_action;
+		$this->_req_nonce    = $this->_req_action . '_nonce';
+		$this->_define_page_props();
+		$this->_current_page_view_url = add_query_arg(
+			['page' => $this->_current_page, 'action' => $this->_current_view],
+			$this->_admin_base_url
+		);
+		// set page configs
+		$this->_set_page_routes();
+		$this->_set_page_config();
+		// let's include any referrer data in our default_query_args for this route for "stickiness".
+		if ($this->request->requestParamIsSet('wp_referer')) {
+			$wp_referer = $this->request->getRequestParam('wp_referer');
+			if ($wp_referer) {
+				$this->_default_route_query_args['wp_referer'] = $wp_referer;
+			}
+		}
+		// for CPT and other extended functionality.
+		// If there is an _extend_page_config_for_cpt
+		// then let's run that to modify all the various page configuration arrays.
+		if (method_exists($this, '_extend_page_config_for_cpt')) {
+			$this->_extend_page_config_for_cpt();
+		}
+		// filter routes and page_config so addons can add their stuff. Filtering done per class
+		$this->_page_routes = apply_filters(
+			'FHEE__' . $this->class_name . '__page_setup__page_routes',
+			$this->_page_routes,
+			$this
+		);
+		$this->_page_config = apply_filters(
+			'FHEE__' . $this->class_name . '__page_setup__page_config',
+			$this->_page_config,
+			$this
+		);
+		if ($this->base_class_name !== '') {
+			$this->_page_routes = apply_filters(
+				'FHEE__' . $this->base_class_name . '__page_setup__page_routes',
+				$this->_page_routes,
+				$this
+			);
+			$this->_page_config = apply_filters(
+				'FHEE__' . $this->base_class_name . '__page_setup__page_config',
+				$this->_page_config,
+				$this
+			);
+		}
+		// if AHEE__EE_Admin_Page__route_admin_request_$this->_current_view method is present
+		// then we call it hooked into the AHEE__EE_Admin_Page__route_admin_request action
+		if (method_exists($this, 'AHEE__EE_Admin_Page__route_admin_request_' . $this->_current_view)) {
+			add_action(
+				'AHEE__EE_Admin_Page__route_admin_request',
+				[$this, 'AHEE__EE_Admin_Page__route_admin_request_' . $this->_current_view],
+				10,
+				2
+			);
+		}
+		// next route only if routing enabled
+		if ($this->_routing && ! $this->request->isAjax()) {
+			$this->_verify_routes();
+			// next let's just check user_access and kill if no access
+			$this->check_user_access();
+			if ($this->_is_UI_request) {
+				// admin_init stuff - global, all views for this page class, specific view
+				add_action('admin_init', [$this, 'admin_init'], 10);
+				if (method_exists($this, 'admin_init_' . $this->_current_view)) {
+					add_action('admin_init', [$this, 'admin_init_' . $this->_current_view], 15);
+				}
+			} else {
+				// hijack regular WP loading and route admin request immediately
+				@ini_set('memory_limit', apply_filters('admin_memory_limit', WP_MAX_MEMORY_LIMIT));
+				$this->route_admin_request();
+			}
+		}
+	}
+
+
+	/**
+	 * Provides a way for related child admin pages to load stuff on the loaded admin page.
+	 *
+	 * @return void
+	 * @throws EE_Error
+	 */
+	private function _do_other_page_hooks()
+	{
+		$registered_pages = apply_filters('FHEE_do_other_page_hooks_' . $this->page_slug, []);
+		foreach ($registered_pages as $page) {
+			// now let's setup the file name and class that should be present
+			$classname = str_replace('.class.php', '', $page);
+			// autoloaders should take care of loading file
+			if (! class_exists($classname)) {
+				$error_msg[] = sprintf(
+					esc_html__(
+						'Something went wrong with loading the %s admin hooks page.',
+						'event_espresso'
+					),
+					$page
+				);
+				$error_msg[] = $error_msg[0]
+							   . "\r\n"
+							   . sprintf(
+								   esc_html__(
+									   'There is no class in place for the %1$s admin hooks page.%2$sMake sure you have %3$s defined. If this is a non-EE-core admin page then you also must have an autoloader in place for your class',
+									   'event_espresso'
+								   ),
+								   $page,
+								   '<br />',
+								   '<strong>' . $classname . '</strong>'
+							   );
+				throw new EE_Error(implode('||', $error_msg));
+			}
+			// notice we are passing the instance of this class to the hook object.
+			$this->loader->getShared($classname, [$this]);
+		}
+	}
+
+
+	/**
+	 * @throws ReflectionException
+	 * @throws EE_Error
+	 */
+	public function load_page_dependencies()
+	{
+		try {
+			$this->_load_page_dependencies();
+		} catch (EE_Error $e) {
+			$e->get_error();
+		}
+	}
+
+
+	/**
+	 * load_page_dependencies
+	 * loads things specific to this page class when its loaded.  Really helps with efficiency.
+	 *
+	 * @return void
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	protected function _load_page_dependencies()
+	{
+		// let's set the current_screen and screen options to override what WP set
+		$this->_current_screen = get_current_screen();
+		// load admin_notices - global, page class, and view specific
+		add_action('admin_notices', [$this, 'admin_notices_global'], 5);
+		add_action('admin_notices', [$this, 'admin_notices'], 10);
+		if (method_exists($this, 'admin_notices_' . $this->_current_view)) {
+			add_action('admin_notices', [$this, 'admin_notices_' . $this->_current_view], 15);
+		}
+		// load network admin_notices - global, page class, and view specific
+		add_action('network_admin_notices', [$this, 'network_admin_notices_global'], 5);
+		if (method_exists($this, 'network_admin_notices_' . $this->_current_view)) {
+			add_action('network_admin_notices', [$this, 'network_admin_notices_' . $this->_current_view]);
+		}
+		// this will save any per_page screen options if they are present
+		$this->_set_per_page_screen_options();
+		// setup list table properties
+		$this->_set_list_table();
+		// child classes can "register" a metabox to be automatically handled via the _page_config array property.
+		// However in some cases the metaboxes will need to be added within a route handling callback.
+		add_action('add_meta_boxes', [$this, 'addRegisteredMetaBoxes'], 99);
+		// hack because promos admin was loading the edited promotion object in the metaboxes callback
+		// which should NOT be generated on non-UI requests like POST updates/inserts
+		if (
+			$this->class_name === 'Promotions_Admin_Page'
+			&& ($this->_req_action === 'edit' || $this->_req_action === 'create_new')
+		) {
+			$this->addRegisteredMetaBoxes();
+		}
+		$this->_add_screen_columns();
+		// add screen options - global, page child class, and view specific
+		$this->_add_global_screen_options();
+		$this->_add_screen_options();
+		$add_screen_options = "_add_screen_options_{$this->_current_view}";
+		if (method_exists($this, $add_screen_options)) {
+			$this->{$add_screen_options}();
+		}
+		// add help tab(s) - set via page_config and qtips.
+		$this->_add_help_tabs();
+		$this->_add_qtips();
+		// add feature_pointers - global, page child class, and view specific
+		$this->_add_feature_pointers();
+		$this->_add_global_feature_pointers();
+		$add_feature_pointer = "_add_feature_pointer_{$this->_current_view}";
+		if (method_exists($this, $add_feature_pointer)) {
+			$this->{$add_feature_pointer}();
+		}
+		// enqueue scripts/styles - global, page class, and view specific
+		add_action('admin_enqueue_scripts', [$this, 'load_global_scripts_styles'], 5);
+		add_action('admin_enqueue_scripts', [$this, 'load_scripts_styles'], 10);
+		if (method_exists($this, "load_scripts_styles_{$this->_current_view}")) {
+			add_action('admin_enqueue_scripts', [$this, "load_scripts_styles_{$this->_current_view}"], 15);
+		}
+		add_action('admin_enqueue_scripts', [$this, 'admin_footer_scripts_eei18n_js_strings'], 100);
+		// admin_print_footer_scripts - global, page child class, and view specific.
+		// NOTE, despite the name, whenever possible, scripts should NOT be loaded using this.
+		// In most cases that's doing_it_wrong().  But adding hidden container elements etc.
+		// is a good use case. Notice the late priority we're giving these
+		add_action('admin_print_footer_scripts', [$this, 'admin_footer_scripts_global'], 99);
+		add_action('admin_print_footer_scripts', [$this, 'admin_footer_scripts'], 100);
+		if (method_exists($this, "admin_footer_scripts_{$this->_current_view}")) {
+			add_action('admin_print_footer_scripts', [$this, "admin_footer_scripts_{$this->_current_view}"], 101);
+		}
+		// admin footer scripts
+		add_action('admin_footer', [$this, 'admin_footer_global'], 99);
+		add_action('admin_footer', [$this, 'admin_footer'], 100);
+		if (method_exists($this, "admin_footer_{$this->_current_view}")) {
+			add_action('admin_footer', [$this, "admin_footer_{$this->_current_view}"], 101);
+		}
+		do_action('FHEE__EE_Admin_Page___load_page_dependencies__after_load', $this->page_slug);
+		// targeted hook
+		do_action(
+			"FHEE__EE_Admin_Page___load_page_dependencies__after_load__{$this->page_slug}__{$this->_req_action}"
+		);
+	}
+
+
+	/**
+	 * _set_defaults
+	 * This sets some global defaults for class properties.
+	 */
+	private function _set_defaults()
+	{
+		$this->_current_screen       = $this->_admin_page_title = $this->_req_action = $this->_req_nonce = null;
+		$this->_event                = $this->_template_path = $this->_column_template_path = null;
+		$this->_nav_tabs             = $this->_views = $this->_page_routes = [];
+		$this->_page_config          = $this->_default_route_query_args = [];
+		$this->_default_nav_tab_name = 'overview';
+		// init template args
+		$this->set_template_args(
+			[
+				'admin_page_header'  => '',
+				'admin_page_content' => '',
+				'post_body_content'  => '',
+				'before_list_table'  => '',
+				'after_list_table'   => '',
+			]
+		);
+	}
+
+
+	/**
+	 * route_admin_request
+	 *
+	 * @return void
+	 * @throws InvalidArgumentException
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidDataTypeException
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 * @see    _route_admin_request()
+	 */
+	public function route_admin_request()
+	{
+		try {
+			$this->_route_admin_request();
+		} catch (EE_Error $e) {
+			$e->get_error();
+		}
+	}
+
+
+	public function set_wp_page_slug($wp_page_slug)
+	{
+		$this->_wp_page_slug = $wp_page_slug;
+		// if in network admin then we need to append "-network" to the page slug. Why? Because that's how WP rolls...
+		if (is_network_admin()) {
+			$this->_wp_page_slug .= '-network';
+		}
+	}
+
+
+	/**
+	 * _verify_routes
+	 * All this method does is verify the incoming request and make sure that routes exist for it.  We do this early so
+	 * we know if we need to drop out.
+	 *
+	 * @return bool
+	 * @throws EE_Error
+	 */
+	protected function _verify_routes()
+	{
+		do_action('AHEE_log', __FILE__, __FUNCTION__, '');
+		if (! $this->_current_page && ! $this->request->isAjax()) {
+			return false;
+		}
+		$this->_route = false;
+		// check that the page_routes array is not empty
+		if (empty($this->_page_routes)) {
+			// user error msg
+			$error_msg = sprintf(
+				esc_html__('No page routes have been set for the %s admin page.', 'event_espresso'),
+				$this->_admin_page_title
+			);
+			// developer error msg
+			$error_msg .= '||' . $error_msg
+						  . esc_html__(
+							  ' Make sure the "set_page_routes()" method exists, and is setting the "_page_routes" array properly.',
+							  'event_espresso'
+						  );
+			throw new EE_Error($error_msg);
+		}
+		// and that the requested page route exists
+		if (array_key_exists($this->_req_action, $this->_page_routes)) {
+			$this->_route        = $this->_page_routes[ $this->_req_action ];
+			$this->_route_config = $this->_page_config[ $this->_req_action ] ?? [];
+		} else {
+			// user error msg
+			$error_msg = sprintf(
+				esc_html__(
+					'The requested page route does not exist for the %s admin page.',
+					'event_espresso'
+				),
+				$this->_admin_page_title
+			);
+			// developer error msg
+			$error_msg .= '||' . $error_msg
+						  . sprintf(
+							  esc_html__(
+								  ' Create a key in the "_page_routes" array named "%s" and set its value to the appropriate method.',
+								  'event_espresso'
+							  ),
+							  $this->_req_action
+						  );
+			throw new EE_Error($error_msg);
+		}
+		// and that a default route exists
+		if (! array_key_exists('default', $this->_page_routes)) {
+			// user error msg
+			$error_msg = sprintf(
+				esc_html__(
+					'A default page route has not been set for the % admin page.',
+					'event_espresso'
+				),
+				$this->_admin_page_title
+			);
+			// developer error msg
+			$error_msg .= '||' . $error_msg
+						  . esc_html__(
+							  ' Create a key in the "_page_routes" array named "default" and set its value to your default page method.',
+							  'event_espresso'
+						  );
+			throw new EE_Error($error_msg);
+		}
+
+		// first lets' catch if the UI request has EVER been set.
+		if ($this->_is_UI_request === null) {
+			// lets set if this is a UI request or not.
+			$this->_is_UI_request = ! $this->request->getRequestParam('noheader', false, 'bool');
+			// wait a minute... we might have a noheader in the route array
+			$this->_is_UI_request = ! (
+				is_array($this->_route) && isset($this->_route['noheader']) && $this->_route['noheader']
+			)
+				? $this->_is_UI_request
+				: false;
+		}
+		$this->_set_current_labels();
+		return true;
+	}
+
+
+	/**
+	 * this method simply verifies a given route and makes sure its an actual route available for the loaded page
+	 *
+	 * @param string $route the route name we're verifying
+	 * @return bool we'll throw an exception if this isn't a valid route.
+	 * @throws EE_Error
+	 */
+	protected function _verify_route($route)
+	{
+		if (array_key_exists($this->_req_action, $this->_page_routes)) {
+			return true;
+		}
+		// user error msg
+		$error_msg = sprintf(
+			esc_html__('The given page route does not exist for the %s admin page.', 'event_espresso'),
+			$this->_admin_page_title
+		);
+		// developer error msg
+		$error_msg .= '||' . $error_msg
+					  . sprintf(
+						  esc_html__(
+							  ' Check the route you are using in your method (%s) and make sure it matches a route set in your "_page_routes" array property',
+							  'event_espresso'
+						  ),
+						  $route
+					  );
+		throw new EE_Error($error_msg);
+	}
+
+
+	/**
+	 * perform nonce verification
+	 * This method has be encapsulated here so that any ajax requests that bypass normal routes can verify their nonces
+	 * using this method (and save retyping!)
+	 *
+	 * @param string $nonce     The nonce sent
+	 * @param string $nonce_ref The nonce reference string (name0)
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	protected function _verify_nonce($nonce, $nonce_ref)
+	{
+		// verify nonce against expected value
+		if (! wp_verify_nonce($nonce, $nonce_ref)) {
+			// these are not the droids you are looking for !!!
+			$msg = sprintf(
+				esc_html__('%sNonce Fail.%s', 'event_espresso'),
+				'<a href="https://www.youtube.com/watch?v=56_S0WeTkzs">',
+				'</a>'
+			);
+			if (WP_DEBUG) {
+				$msg .= "\n  ";
+				$msg .= sprintf(
+					esc_html__(
+						'In order to dynamically generate nonces for your actions, use the %s::add_query_args_and_nonce() method. May the Nonce be with you!',
+						'event_espresso'
+					),
+					__CLASS__
+				);
+			}
+			if (! $this->request->isAjax()) {
+				wp_die($msg);
+			}
+			EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
+			$this->_return_json();
+		}
+	}
+
+
+	/**
+	 * _route_admin_request()
+	 * Meat and potatoes of the class.  Basically, this dude checks out what's being requested and sees if there are
+	 * some doodads to work the magic and handle the flingjangy. Translation:  Checks if the requested action is listed
+	 * in the page routes and then will try to load the corresponding method.
+	 *
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	protected function _route_admin_request()
+	{
+		if (! $this->_is_UI_request) {
+			$this->_verify_routes();
+		}
+		$nonce_check = ! isset($this->_route_config['require_nonce']) || $this->_route_config['require_nonce'];
+		if ($this->_req_action !== 'default' && $nonce_check) {
+			// set nonce from post data
+			$nonce = $this->request->getRequestParam($this->_req_nonce, '');
+			$this->_verify_nonce($nonce, $this->_req_nonce);
+		}
+		// set the nav_tabs array but ONLY if this is  UI_request
+		if ($this->_is_UI_request) {
+			$this->_set_nav_tabs();
+		}
+		// grab callback function
+		$func = is_array($this->_route) && isset($this->_route['func'])
+			? $this->_route['func']
+			: $this->_route;
+		// check if callback has args
+		$args = is_array($this->_route) && isset($this->_route['args']) ? $this->_route['args'] : [];
+		// action right before calling route
+		// (hook is something like 'AHEE__Registrations_Admin_Page__route_admin_request')
+		if (! did_action('AHEE__EE_Admin_Page__route_admin_request')) {
+			do_action('AHEE__EE_Admin_Page__route_admin_request', $this->_current_view, $this);
+		}
+		// strip _wp_http_referer from the server REQUEST_URI
+		// else it grows in length on every submission due to recursion,
+		// ultimately causing a "Request-URI Too Large" error
+		$this->request->unSetRequestParam('_wp_http_referer');
+		$this->request->unSetServerParam('_wp_http_referer');
+		$cleaner_request_uri = remove_query_arg(
+			'_wp_http_referer',
+			wp_unslash($this->request->getServerParam('REQUEST_URI'))
+		);
+		$this->request->setRequestParam('_wp_http_referer', $cleaner_request_uri, true);
+		$this->request->setServerParam('REQUEST_URI', $cleaner_request_uri, true);
+		$route_callback = [];
+		if (! empty($func)) {
+			if (is_array($func)) {
+				$route_callback = $func;
+			} elseif (is_string($func)) {
+				if (strpos($func, '::') !== false) {
+					$route_callback = explode('::', $func);
+				} elseif (method_exists($this, $func)) {
+					$route_callback = [$this, $func];
+				} else {
+					$route_callback = $func;
+				}
+			}
+			[$class, $method] = $route_callback;
+			// is it neither a class method NOR a standalone function?
+			if (! is_callable($route_callback)) {
+				// user error msg
+				$error_msg = esc_html__(
+					'An error occurred. The  requested page route could not be found.',
+					'event_espresso'
+				);
+				// developer error msg
+				$error_msg .= '||';
+				$error_msg .= sprintf(
+					esc_html__(
+						'Page route "%s" could not be called. Check that the spelling for method names and actions in the "_page_routes" array are all correct.',
+						'event_espresso'
+					),
+					$method
+				);
+				throw new DomainException($error_msg);
+			}
+			if ($class !== $this && ! in_array($this, $args)) {
+				// send along this admin page object for access by addons.
+				$args['admin_page'] = $this;
+			}
+
+			try {
+				call_user_func_array($route_callback, $args);
+			} catch (Throwable $throwable) {
+				$arg_keys = array_keys($args);
+				$nice_args = [];
+				foreach ($args as $key => $arg) {
+					$nice_args[ $key ] = is_object($arg) ? get_class($arg) : $arg_keys[ $key ];
+				}
+				new ExceptionStackTraceDisplay(
+						new RuntimeException(
+							sprintf(
+								esc_html__(
+									'Page route "%1$s" with the supplied arguments (%2$s) threw the following exception: %3$s',
+									'event_espresso'
+								),
+								$method,
+								implode(', ', $nice_args),
+								$throwable->getMessage()
+							),
+							$throwable->getCode(),
+							$throwable
+						)
+				);
+			}
+		}
+		// if we've routed and this route has a no headers route AND a sent_headers_route,
+		// then we need to reset the routing properties to the new route.
+		// now if UI request is FALSE and noheader is true AND we have a headers_sent_route in the route array then let's set UI_request to true because the no header route has a second func after headers have been sent.
+		if (
+			$this->_is_UI_request === false
+			&& is_array($this->_route)
+			&& ! empty($this->_route['headers_sent_route'])
+		) {
+			$this->_reset_routing_properties($this->_route['headers_sent_route']);
+		}
+	}
+
+
+	/**
+	 * This method just allows the resetting of page properties in the case where a no headers
+	 * route redirects to a headers route in its route config.
+	 *
+	 * @param string $new_route New (non header) route to redirect to.
+	 * @return   void
+	 * @throws ReflectionException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidDataTypeException
+	 * @throws EE_Error
+	 * @since   4.3.0
+	 */
+	protected function _reset_routing_properties($new_route)
+	{
+		$this->_is_UI_request = true;
+		// now we set the current route to whatever the headers_sent_route is set at
+		$this->request->setRequestParam('action', $new_route);
+		// rerun page setup
+		$this->_page_setup();
+	}
+
+
+	/**
+	 * _add_query_arg
+	 * adds nonce to array of arguments then calls WP add_query_arg function
+	 *(internally just uses EEH_URL's function with the same name)
+	 *
+	 * @param array  $args
+	 * @param string $url
+	 * @param bool   $sticky                  if true, then the existing Request params will be appended to the
+	 *                                        generated url in an associative array indexed by the key 'wp_referer';
+	 *                                        Example usage: If the current page is:
+	 *                                        http://mydomain.com/wp-admin/admin.php?page=espresso_registrations
+	 *                                        &action=default&event_id=20&month_range=March%202015
+	 *                                        &_wpnonce=5467821
+	 *                                        and you call:
+	 *                                        EE_Admin_Page::add_query_args_and_nonce(
+	 *                                        array(
+	 *                                        'action' => 'resend_something',
+	 *                                        'page=>espresso_registrations'
+	 *                                        ),
+	 *                                        $some_url,
+	 *                                        true
+	 *                                        );
+	 *                                        It will produce a url in this structure:
+	 *                                        http://{$some_url}/?page=espresso_registrations&action=resend_something
+	 *                                        &wp_referer[action]=default&wp_referer[event_id]=20&wpreferer[
+	 *                                        month_range]=March%202015
+	 * @param bool   $exclude_nonce           If true, the the nonce will be excluded from the generated nonce.
+	 * @param int    $context
+	 * @return string
+	 */
+	public static function add_query_args_and_nonce(
+		$args = [],
+		$url = '',
+		$sticky = false,
+		$exclude_nonce = false,
+		int $context = EEH_URL::CONTEXT_NONE
+	) {
+		// if there is a _wp_http_referer include the values from the request but only if sticky = true
+		if ($sticky) {
+			/** @var RequestInterface $request */
+			$request = LoaderFactory::getLoader()->getShared(RequestInterface::class);
+			$request->unSetRequestParams(['_wp_http_referer', 'wp_referer'], true);
+			$request->unSetServerParam('_wp_http_referer', true);
+			foreach ($request->requestParams() as $key => $value) {
+				// do not add nonces
+				if (strpos($key, 'nonce') !== false) {
+					continue;
+				}
+				$args[ 'wp_referer[' . $key . ']' ] = is_string($value) ? htmlspecialchars($value) : $value;
+			}
+		}
+		return EEH_URL::add_query_args_and_nonce($args, $url, $exclude_nonce, $context);
+	}
+
+
+	/**
+	 * This returns a generated link that will load the related help tab.
+	 *
+	 * @param string $help_tab_id the id for the connected help tab
+	 * @param string $icon_style  (optional) include css class for the style you want to use for the help icon.
+	 * @param string $help_text   (optional) send help text you want to use for the link if default not to be used
+	 * @return string              generated link
+	 * @uses EEH_Template::get_help_tab_link()
+	 */
+	protected function _get_help_tab_link($help_tab_id, $icon_style = '', $help_text = '')
+	{
+		return EEH_Template::get_help_tab_link(
+			$help_tab_id,
+			$this->page_slug,
+			$this->_req_action,
+			$icon_style,
+			$help_text
+		);
+	}
+
+
+	/**
+	 * _add_help_tabs
+	 * Note child classes define their help tabs within the page_config array.
+	 *
+	 * @link   http://codex.wordpress.org/Function_Reference/add_help_tab
+	 * @return void
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	protected function _add_help_tabs()
+	{
+		if (isset($this->_page_config[ $this->_req_action ])) {
+			$config = $this->_page_config[ $this->_req_action ];
+			// let's see if there is a help_sidebar set for the current route and we'll set that up for usage as well.
+			if (is_array($config) && isset($config['help_sidebar'])) {
+				// check that the callback given is valid
+				if (! method_exists($this, $config['help_sidebar'])) {
+					throw new EE_Error(
+						sprintf(
+							esc_html__(
+								'The _page_config array has a callback set for the "help_sidebar" option.  However the callback given (%s) is not a valid callback.  Doublecheck the spelling and make sure this method exists for the class %s',
+								'event_espresso'
+							),
+							$config['help_sidebar'],
+							$this->class_name
+						)
+					);
+				}
+				$content = apply_filters(
+					'FHEE__' . $this->class_name . '__add_help_tabs__help_sidebar',
+					$this->{$config['help_sidebar']}()
+				);
+				$this->_current_screen->set_help_sidebar($content);
+			}
+			if (! isset($config['help_tabs'])) {
+				return;
+			} //no help tabs for this route
+			foreach ((array) $config['help_tabs'] as $tab_id => $cfg) {
+				// we're here so there ARE help tabs!
+				// make sure we've got what we need
+				if (! isset($cfg['title'])) {
+					throw new EE_Error(
+						esc_html__(
+							'The _page_config array is not set up properly for help tabs.  It is missing a title',
+							'event_espresso'
+						)
+					);
+				}
+				if (! isset($cfg['filename']) && ! isset($cfg['callback']) && ! isset($cfg['content'])) {
+					throw new EE_Error(
+						esc_html__(
+							'The _page_config array is not setup properly for help tabs. It is missing a either a filename reference, or a callback reference or a content reference so there is no way to know the content for the help tab',
+							'event_espresso'
+						)
+					);
+				}
+				// first priority goes to content.
+				if (! empty($cfg['content'])) {
+					$content = ! empty($cfg['content']) ? $cfg['content'] : null;
+					// second priority goes to filename
+				} elseif (! empty($cfg['filename'])) {
+					$file_path = $this->_get_dir() . '/help_tabs/' . $cfg['filename'] . '.help_tab.php';
+					// it's possible that the file is located on decaf route (and above sets up for caf route, if this is the case then lets check decaf route too)
+					$file_path = ! is_readable($file_path) ? EE_ADMIN_PAGES
+															 . basename($this->_get_dir())
+															 . '/help_tabs/'
+															 . $cfg['filename']
+															 . '.help_tab.php' : $file_path;
+					// if file is STILL not readable then let's do a EE_Error so its more graceful than a fatal error.
+					if (! isset($cfg['callback']) && ! is_readable($file_path)) {
+						EE_Error::add_error(
+							sprintf(
+								esc_html__(
+									'The filename given for the help tab %s is not a valid file and there is no other configuration for the tab content.  Please check that the string you set for the help tab on this route (%s) is the correct spelling.  The file should be in %s',
+									'event_espresso'
+								),
+								$tab_id,
+								key($config),
+								$file_path
+							),
+							__FILE__,
+							__FUNCTION__,
+							__LINE__
+						);
+						return;
+					}
+					$template_args['admin_page_obj'] = $this;
+					$content                         = EEH_Template::display_template(
+						$file_path,
+						$template_args,
+						true
+					);
+				} else {
+					$content = '';
+				}
+				// check if callback is valid
+				if (
+					empty($content)
+					&& (
+						! isset($cfg['callback']) || ! method_exists($this, $cfg['callback'])
+					)
+				) {
+					EE_Error::add_error(
+						sprintf(
+							esc_html__(
+								'The callback given for a %s help tab on this page does not content OR a corresponding method for generating the content.  Check the spelling or make sure the method is present.',
+								'event_espresso'
+							),
+							$cfg['title']
+						),
+						__FILE__,
+						__FUNCTION__,
+						__LINE__
+					);
+					return;
+				}
+				// setup config array for help tab method
+				$id  = $this->page_slug . '-' . $this->_req_action . '-' . $tab_id;
+				$_ht = [
+					'id'       => $id,
+					'title'    => $cfg['title'],
+					'callback' => isset($cfg['callback']) && empty($content) ? [$this, $cfg['callback']] : null,
+					'content'  => $content,
+				];
+				$this->_current_screen->add_help_tab($_ht);
+			}
+		}
+	}
+
+
+	/**
+	 * This simply sets up any qtips that have been defined in the page config
+	 *
+	 * @return void
+	 * @throws ReflectionException
+	 * @throws EE_Error
+	 */
+	protected function _add_qtips()
+	{
+		if (isset($this->_route_config['qtips'])) {
+			$qtips = (array) $this->_route_config['qtips'];
+			// load qtip loader
+			$path = [
+				$this->_get_dir() . '/qtips/',
+				EE_ADMIN_PAGES . basename($this->_get_dir()) . '/qtips/',
+			];
+			EEH_Qtip_Loader::instance()->register($qtips, $path);
+		}
+	}
+
+
+	/**
+	 * _set_nav_tabs
+	 * This sets up the nav tabs from the page_routes array.  This method can be overwritten by child classes if you
+	 * wish to add additional tabs or modify accordingly.
+	 *
+	 * @return void
+	 * @throws InvalidArgumentException
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidDataTypeException
+	 */
+	protected function _set_nav_tabs()
+	{
+		$i        = 0;
+		$only_tab = count($this->_page_config) < 2;
+		foreach ($this->_page_config as $slug => $config) {
+			if (! is_array($config) || empty($config['nav'])) {
+				continue;
+			}
+			// no nav tab for this config
+			// check for persistent flag
+			if ($slug !== $this->_req_action && isset($config['nav']['persistent']) && ! $config['nav']['persistent']) {
+				// nav tab is only to appear when route requested.
+				continue;
+			}
+			if (! $this->check_user_access($slug, true)) {
+				// no nav tab because current user does not have access.
+				continue;
+			}
+			$css_class = $config['css_class'] ?? '';
+			$css_class .= $only_tab ? ' ee-only-tab' : '';
+			$css_class .= " ee-nav-tab__$slug";
+
+			$this->_nav_tabs[ $slug ] = [
+				'url'       => $config['nav']['url'] ?? EE_Admin_Page::add_query_args_and_nonce(
+						['action' => $slug],
+						$this->_admin_base_url
+					),
+				'link_text' => $this->navTabLabel($config['nav'], $slug),
+				'css_class' => $this->_req_action === $slug ? $css_class . ' nav-tab-active' : $css_class,
+				'order'     => $config['nav']['order'] ?? $i,
+			];
+			$i++;
+		}
+		// if $this->_nav_tabs is empty then lets set the default
+		if (empty($this->_nav_tabs)) {
+			$this->_nav_tabs[ $this->_default_nav_tab_name ] = [
+				'url'       => $this->_admin_base_url,
+				'link_text' => ucwords(str_replace('_', ' ', $this->_default_nav_tab_name)),
+				'css_class' => 'nav-tab-active',
+				'order'     => 10,
+			];
+		}
+		// now let's sort the tabs according to order
+		usort($this->_nav_tabs, [$this, '_sort_nav_tabs']);
+	}
+
+
+	private function navTabLabel(array $nav_tab, string $slug): string
+	{
+		$label = $nav_tab['label'] ?? ucwords(str_replace('_', ' ', $slug));
+		$icon  = $nav_tab['icon'] ?? null;
+		$icon  = $icon ? '<span class="dashicons ' . $icon . '"></span>' : '';
+		return '
             <span class="ee-admin-screen-tab__label">
                 ' . $icon . '
                 <span class="ee-nav-label__text">' . $label . '</span>
             </span>';
-    }
-
-
-    /**
-     * _set_current_labels
-     * This method modifies the _labels property with any optional specific labels indicated in the _page_routes
-     * property array
-     *
-     * @return void
-     */
-    private function _set_current_labels()
-    {
-        if (is_array($this->_route_config) && isset($this->_route_config['labels'])) {
-            foreach ($this->_route_config['labels'] as $label => $text) {
-                if (is_array($text)) {
-                    foreach ($text as $sublabel => $subtext) {
-                        $this->_labels[ $label ][ $sublabel ] = $subtext;
-                    }
-                } else {
-                    $this->_labels[ $label ] = $text;
-                }
-            }
-        }
-    }
-
-
-    /**
-     *        verifies user access for this admin page
-     *
-     * @param string $route_to_check if present then the capability for the route matching this string is checked.
-     * @param bool   $verify_only    Default is FALSE which means if user check fails then wp_die().  Otherwise just
-     *                               return false if verify fail.
-     * @return bool
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function check_user_access($route_to_check = '', $verify_only = false)
-    {
-        $route_to_check = ! empty($route_to_check) ? $route_to_check : $this->_req_action;
-        $capability     = ! empty($route_to_check)
-                          && isset($this->_page_routes[ $route_to_check ])
-                          && is_array($this->_page_routes[ $route_to_check ])
-                          && ! empty($this->_page_routes[ $route_to_check ]['capability'])
-            ? $this->_page_routes[ $route_to_check ]['capability']
-            : null;
-
-        if (empty($capability) && empty($route_to_check)) {
-            $capability = ! empty($this->_route['capability']) ? $this->_route['capability'] : 'manage_options';
-        } else {
-            $capability = empty($capability) ? 'manage_options' : $capability;
-        }
-
-        $id = is_array($this->_route) && ! empty($this->_route['obj_id']) ? $this->_route['obj_id'] : 0;
-
-        if (
-            ! $this->request->isAjax()
-            && (
-                ! function_exists('is_admin')
-                || ! EE_Registry::instance()->CAP->current_user_can(
-                    $capability,
-                    "{$this->page_slug}_$route_to_check",
-                    $id
-                )
-            )
-        ) {
-            if ($verify_only) {
-                return false;
-            }
-            if (is_user_logged_in()) {
-                wp_die(esc_html__('You do not have access to this route.', 'event_espresso'));
-            }
-            return false;
-        }
-        return true;
-    }
-
-
-    /**
-     * @param string                 $box_id
-     * @param string                 $title
-     * @param callable|string|null   $callback
-     * @param string|array|WP_Screen $screen
-     * @param string                 $context
-     * @param string                 $priority
-     * @param array|null             $callback_args
-     */
-    protected function addMetaBox(
-        string $box_id,
-        string $title,
-        $callback,
-        $screen,
-        string $context = 'normal',
-        string $priority = 'default',
-        ?array $callback_args = null
-    ) {
-        if (! (is_callable($callback) || ! function_exists($callback))) {
-            return;
-        }
-
-        add_meta_box($box_id, $title, $callback, $screen, $context, $priority, $callback_args);
-        add_filter(
-            "postbox_classes_{$this->_wp_page_slug}_{$box_id}",
-            function ($classes) {
-                $classes[] = 'ee-admin-container';
-                return $classes;
-            }
-        );
-    }
-
-
-    /**
-     * admin_init_global
-     * This runs all the code that we want executed within the WP admin_init hook.
-     * This method executes for ALL EE Admin pages.
-     *
-     * @return void
-     */
-    public function admin_init_global()
-    {
-    }
-
-
-    /**
-     * wp_loaded_global
-     * This runs all the code that we want executed within the WP wp_loaded hook.  This method is optional for an
-     * EE_Admin page and will execute on every EE Admin Page load
-     *
-     * @return void
-     */
-    public function wp_loaded()
-    {
-    }
-
-
-    /**
-     * admin_notices
-     * Anything triggered by the 'admin_notices' WP hook should be put in here.  This particular method will apply on
-     * ALL EE_Admin pages.
-     *
-     * @return void
-     */
-    public function admin_notices_global()
-    {
-        $this->_display_no_javascript_warning();
-        $this->_display_espresso_notices();
-    }
-
-
-    public function network_admin_notices_global()
-    {
-        $this->_display_no_javascript_warning();
-        $this->_display_espresso_notices();
-    }
-
-
-    /**
-     * admin_footer_scripts_global
-     * Anything triggered by the 'admin_print_footer_scripts' WP hook should be put in here. This particular method
-     * will apply on ALL EE_Admin pages.
-     *
-     * @return void
-     */
-    public function admin_footer_scripts_global()
-    {
-        $this->_add_admin_page_ajax_loading_img();
-        $this->_add_admin_page_overlay();
-        // if metaboxes are present we need to add the nonce field
-        if (
-            isset($this->_route_config['metaboxes'])
-            || isset($this->_route_config['list_table'])
-            || (isset($this->_route_config['has_metaboxes']) && $this->_route_config['has_metaboxes'])
-        ) {
-            wp_nonce_field('closedpostboxes', 'closedpostboxesnonce', false);
-            wp_nonce_field('meta-box-order', 'meta-box-order-nonce', false);
-        }
-    }
-
-
-    /**
-     * admin_footer_global
-     * Anything triggered by the wp 'admin_footer' wp hook should be put in here.
-     * This particular method will apply on ALL EE_Admin Pages.
-     *
-     * @return void
-     */
-    public function admin_footer_global()
-    {
-        // dialog container for dialog helper
-        echo '
+	}
+
+
+	/**
+	 * _set_current_labels
+	 * This method modifies the _labels property with any optional specific labels indicated in the _page_routes
+	 * property array
+	 *
+	 * @return void
+	 */
+	private function _set_current_labels()
+	{
+		if (is_array($this->_route_config) && isset($this->_route_config['labels'])) {
+			foreach ($this->_route_config['labels'] as $label => $text) {
+				if (is_array($text)) {
+					foreach ($text as $sublabel => $subtext) {
+						$this->_labels[ $label ][ $sublabel ] = $subtext;
+					}
+				} else {
+					$this->_labels[ $label ] = $text;
+				}
+			}
+		}
+	}
+
+
+	/**
+	 *        verifies user access for this admin page
+	 *
+	 * @param string $route_to_check if present then the capability for the route matching this string is checked.
+	 * @param bool   $verify_only    Default is FALSE which means if user check fails then wp_die().  Otherwise just
+	 *                               return false if verify fail.
+	 * @return bool
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function check_user_access($route_to_check = '', $verify_only = false)
+	{
+		$route_to_check = ! empty($route_to_check) ? $route_to_check : $this->_req_action;
+		$capability     = ! empty($route_to_check)
+						  && isset($this->_page_routes[ $route_to_check ])
+						  && is_array($this->_page_routes[ $route_to_check ])
+						  && ! empty($this->_page_routes[ $route_to_check ]['capability'])
+			? $this->_page_routes[ $route_to_check ]['capability']
+			: null;
+
+		if (empty($capability) && empty($route_to_check)) {
+			$capability = ! empty($this->_route['capability']) ? $this->_route['capability'] : 'manage_options';
+		} else {
+			$capability = empty($capability) ? 'manage_options' : $capability;
+		}
+
+		$id = is_array($this->_route) && ! empty($this->_route['obj_id']) ? $this->_route['obj_id'] : 0;
+
+		if (
+			! $this->request->isAjax()
+			&& (
+				! function_exists('is_admin')
+				|| ! EE_Registry::instance()->CAP->current_user_can(
+					$capability,
+					"{$this->page_slug}_$route_to_check",
+					$id
+				)
+			)
+		) {
+			if ($verify_only) {
+				return false;
+			}
+			if (is_user_logged_in()) {
+				wp_die(esc_html__('You do not have access to this route.', 'event_espresso'));
+			}
+			return false;
+		}
+		return true;
+	}
+
+
+	/**
+	 * @param string                 $box_id
+	 * @param string                 $title
+	 * @param callable|string|null   $callback
+	 * @param string|array|WP_Screen $screen
+	 * @param string                 $context
+	 * @param string                 $priority
+	 * @param array|null             $callback_args
+	 */
+	protected function addMetaBox(
+		string $box_id,
+		string $title,
+		$callback,
+		$screen,
+		string $context = 'normal',
+		string $priority = 'default',
+		?array $callback_args = null
+	) {
+		if (! (is_callable($callback) || ! function_exists($callback))) {
+			return;
+		}
+
+		add_meta_box($box_id, $title, $callback, $screen, $context, $priority, $callback_args);
+		add_filter(
+			"postbox_classes_{$this->_wp_page_slug}_{$box_id}",
+			function ($classes) {
+				$classes[] = 'ee-admin-container';
+				return $classes;
+			}
+		);
+	}
+
+
+	/**
+	 * admin_init_global
+	 * This runs all the code that we want executed within the WP admin_init hook.
+	 * This method executes for ALL EE Admin pages.
+	 *
+	 * @return void
+	 */
+	public function admin_init_global()
+	{
+	}
+
+
+	/**
+	 * wp_loaded_global
+	 * This runs all the code that we want executed within the WP wp_loaded hook.  This method is optional for an
+	 * EE_Admin page and will execute on every EE Admin Page load
+	 *
+	 * @return void
+	 */
+	public function wp_loaded()
+	{
+	}
+
+
+	/**
+	 * admin_notices
+	 * Anything triggered by the 'admin_notices' WP hook should be put in here.  This particular method will apply on
+	 * ALL EE_Admin pages.
+	 *
+	 * @return void
+	 */
+	public function admin_notices_global()
+	{
+		$this->_display_no_javascript_warning();
+		$this->_display_espresso_notices();
+	}
+
+
+	public function network_admin_notices_global()
+	{
+		$this->_display_no_javascript_warning();
+		$this->_display_espresso_notices();
+	}
+
+
+	/**
+	 * admin_footer_scripts_global
+	 * Anything triggered by the 'admin_print_footer_scripts' WP hook should be put in here. This particular method
+	 * will apply on ALL EE_Admin pages.
+	 *
+	 * @return void
+	 */
+	public function admin_footer_scripts_global()
+	{
+		$this->_add_admin_page_ajax_loading_img();
+		$this->_add_admin_page_overlay();
+		// if metaboxes are present we need to add the nonce field
+		if (
+			isset($this->_route_config['metaboxes'])
+			|| isset($this->_route_config['list_table'])
+			|| (isset($this->_route_config['has_metaboxes']) && $this->_route_config['has_metaboxes'])
+		) {
+			wp_nonce_field('closedpostboxes', 'closedpostboxesnonce', false);
+			wp_nonce_field('meta-box-order', 'meta-box-order-nonce', false);
+		}
+	}
+
+
+	/**
+	 * admin_footer_global
+	 * Anything triggered by the wp 'admin_footer' wp hook should be put in here.
+	 * This particular method will apply on ALL EE_Admin Pages.
+	 *
+	 * @return void
+	 */
+	public function admin_footer_global()
+	{
+		// dialog container for dialog helper
+		echo '
         <div class="ee-admin-dialog-container auto-hide hidden">
             <div class="ee-notices"></div>
             <div class="ee-admin-dialog-container-inner-content"></div>
         </div>
         ';
 
-        // current set timezone for timezone js
-        echo '<span id="current_timezone" class="hidden">' . esc_html(EEH_DTT_Helper::get_timezone()) . '</span>';
-    }
-
-
-    /**
-     * This function sees if there is a method for help popup content existing for the given route.  If there is then
-     * we'll use the retrieved array to output the content using the template. For child classes: If you want to have
-     * help popups then in your templates or your content you set "triggers" for the content using the
-     * "_set_help_trigger('help_trigger_id')" where "help_trigger_id" is what you will use later in your custom method
-     * for the help popup content on that page. Then in your Child_Admin_Page class you need to define a help popup
-     * method for the content in the format "_help_popup_content_{route_name}()"  So if you are setting help content
-     * for the
-     * 'edit_event' route you should have a method named "_help_popup_content_edit_route". In your defined
-     * "help_popup_content_..." method.  You must prepare and return an array in the following format array(
-     *    'help_trigger_id' => array(
-     *        'title' => esc_html__('localized title for popup', 'event_espresso'),
-     *        'content' => esc_html__('localized content for popup', 'event_espresso')
-     *    )
-     * );
-     * Then the EE_Admin_Parent will take care of making sure that is setup properly on the correct route.
-     *
-     * @param array $help_array
-     * @param bool  $display
-     * @return string content
-     * @throws DomainException
-     * @throws EE_Error
-     */
-    protected function _set_help_popup_content($help_array = [], $display = false)
-    {
-        $content    = '';
-        $help_array = empty($help_array) ? $this->_get_help_content() : $help_array;
-        // loop through the array and setup content
-        foreach ($help_array as $trigger => $help) {
-            // make sure the array is setup properly
-            if (! isset($help['title'], $help['content'])) {
-                throw new EE_Error(
-                    esc_html__(
-                        'Does not look like the popup content array has been setup correctly.  Might want to double check that.  Read the comments for the _get_help_popup_content method found in "EE_Admin_Page" class',
-                        'event_espresso'
-                    )
-                );
-            }
-            // we're good so let's setup the template vars and then assign parsed template content to our content.
-            $template_args = [
-                'help_popup_id'      => $trigger,
-                'help_popup_title'   => $help['title'],
-                'help_popup_content' => $help['content'],
-            ];
-            $content       .= EEH_Template::display_template(
-                EE_ADMIN_TEMPLATE . 'admin_help_popup.template.php',
-                $template_args,
-                true
-            );
-        }
-        if ($display) {
-            echo wp_kses($content, AllowedTags::getWithFormTags());
-            return '';
-        }
-        return $content;
-    }
-
-
-    /**
-     * All this does is retrieve the help content array if set by the EE_Admin_Page child
-     *
-     * @return array properly formatted array for help popup content
-     * @throws EE_Error
-     */
-    private function _get_help_content()
-    {
-        // what is the method we're looking for?
-        $method_name = '_help_popup_content_' . $this->_req_action;
-        // if method doesn't exist let's get out.
-        if (! method_exists($this, $method_name)) {
-            return [];
-        }
-        // k we're good to go let's retrieve the help array
-        $help_array = $this->{$method_name}();
-        // make sure we've got an array!
-        if (! is_array($help_array)) {
-            throw new EE_Error(
-                esc_html__(
-                    'Something went wrong with help popup content generation. Expecting an array and well, this ain\'t no array bub.',
-                    'event_espresso'
-                )
-            );
-        }
-        return $help_array;
-    }
-
-
-    /**
-     * EE Admin Pages can use this to set a properly formatted trigger for a help popup.
-     * By default the trigger html is printed.  Otherwise it can be returned if the $display flag is set "false"
-     * See comments made on the _set_help_content method for understanding other parts to the help popup tool.
-     *
-     * @param string  $trigger_id reference for retrieving the trigger content for the popup
-     * @param boolean $display    if false then we return the trigger string
-     * @param array   $dimensions an array of dimensions for the box (array(h,w))
-     * @return string
-     * @throws DomainException
-     * @throws EE_Error
-     */
-    protected function _set_help_trigger($trigger_id, $display = true, $dimensions = ['400', '640'])
-    {
-        if ($this->request->isAjax()) {
-            return '';
-        }
-        // let's check and see if there is any content set for this popup.  If there isn't then we'll include a default title and content so that developers know something needs to be corrected
-        $help_array   = $this->_get_help_content();
-        $help_content = '';
-        if (empty($help_array) || ! isset($help_array[ $trigger_id ])) {
-            $help_array[ $trigger_id ] = [
-                'title'   => esc_html__('Missing Content', 'event_espresso'),
-                'content' => esc_html__(
-                    'A trigger has been set that doesn\'t have any corresponding content. Make sure you have set the help content. (see the "_set_help_popup_content" method in the EE_Admin_Page for instructions.)',
-                    'event_espresso'
-                ),
-            ];
-            $help_content              = $this->_set_help_popup_content($help_array);
-        }
-        // let's setup the trigger
-        $content = '<a class="ee-dialog" href="?height='
-                   . esc_attr($dimensions[0])
-                   . '&width='
-                   . esc_attr($dimensions[1])
-                   . '&inlineId='
-                   . esc_attr($trigger_id)
-                   . '" target="_blank"><span class="question ee-help-popup-question"></span></a>';
-        $content .= $help_content;
-        if ($display) {
-            echo wp_kses($content, AllowedTags::getWithFormTags());
-            return '';
-        }
-        return $content;
-    }
-
-
-    /**
-     * _add_global_screen_options
-     * Add any extra wp_screen_options within this method using built-in WP functions/methods for doing so.
-     * This particular method will add_screen_options on ALL EE_Admin Pages
-     *
-     * @link   http://chrismarslender.com/wp-tutorials/wordpress-screen-options-tutorial/
-     *         see also WP_Screen object documents...
-     * @link   http://codex.wordpress.org/Class_Reference/WP_Screen
-     * @abstract
-     * @return void
-     */
-    private function _add_global_screen_options()
-    {
-    }
-
-
-    /**
-     * _add_global_feature_pointers
-     * This method is used for implementing any "feature pointers" (using built-in WP styling js).
-     * This particular method will implement feature pointers for ALL EE_Admin pages.
-     * Note: this is just a placeholder for now.  Implementation will come down the road
-     *
-     * @see    WP_Internal_Pointers class in wp-admin/includes/template.php for example (its a final class so can't be
-     *         extended) also see:
-     * @link   http://eamann.com/tech/wordpress-portland/
-     * @abstract
-     * @return void
-     */
-    private function _add_global_feature_pointers()
-    {
-    }
-
-
-    /**
-     * load_global_scripts_styles
-     * The scripts and styles enqueued in here will be loaded on every EE Admin page
-     *
-     * @return void
-     */
-    public function load_global_scripts_styles()
-    {
-        // add debugging styles
-        if (WP_DEBUG) {
-            add_action('admin_head', [$this, 'add_xdebug_style']);
-        }
-        // taking care of metaboxes
-        if (
-            empty($this->_cpt_route)
-            && (isset($this->_route_config['metaboxes']) || isset($this->_route_config['has_metaboxes']))
-        ) {
-            wp_enqueue_script('dashboard');
-        }
-
-        wp_enqueue_script(JqueryAssetManager::JS_HANDLE_JQUERY_UI_TOUCH_PUNCH);
-        wp_enqueue_script(EspressoLegacyAdminAssetManager::JS_HANDLE_EE_ADMIN);
-        // LOCALIZED DATA
-        // localize script for ajax lazy loading
-        wp_localize_script(
-            EspressoLegacyAdminAssetManager::JS_HANDLE_EE_ADMIN,
-            'eeLazyLoadingContainers',
-            apply_filters(
-                'FHEE__EE_Admin_Page_Core__load_global_scripts_styles__loader_containers',
-                ['espresso_news_post_box_content']
-            )
-        );
-        StatusChangeNotice::loadAssets();
-
-        add_filter(
-            'admin_body_class',
-            function ($classes) {
-                if (strpos($classes, 'espresso-admin') === false) {
-                    $classes .= ' espresso-admin';
-                }
-                return $classes;
-            }
-        );
-    }
-
-
-    /**
-     *        admin_footer_scripts_eei18n_js_strings
-     *
-     * @return        void
-     */
-    public function admin_footer_scripts_eei18n_js_strings()
-    {
-        EE_Registry::$i18n_js_strings['ajax_url']       = WP_AJAX_URL;
-        EE_Registry::$i18n_js_strings['confirm_delete'] = wp_strip_all_tags(
-            __(
-                'Are you absolutely sure you want to delete this item?\nThis action will delete ALL DATA associated with this item!!!\nThis can NOT be undone!!!',
-                'event_espresso'
-            )
-        );
-        EE_Registry::$i18n_js_strings['January']        = wp_strip_all_tags(__('January', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['February']       = wp_strip_all_tags(__('February', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['March']          = wp_strip_all_tags(__('March', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['April']          = wp_strip_all_tags(__('April', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['May']            = wp_strip_all_tags(__('May', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['June']           = wp_strip_all_tags(__('June', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['July']           = wp_strip_all_tags(__('July', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['August']         = wp_strip_all_tags(__('August', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['September']      = wp_strip_all_tags(__('September', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['October']        = wp_strip_all_tags(__('October', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['November']       = wp_strip_all_tags(__('November', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['December']       = wp_strip_all_tags(__('December', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Jan']            = wp_strip_all_tags(__('Jan', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Feb']            = wp_strip_all_tags(__('Feb', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Mar']            = wp_strip_all_tags(__('Mar', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Apr']            = wp_strip_all_tags(__('Apr', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['May']            = wp_strip_all_tags(__('May', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Jun']            = wp_strip_all_tags(__('Jun', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Jul']            = wp_strip_all_tags(__('Jul', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Aug']            = wp_strip_all_tags(__('Aug', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Sep']            = wp_strip_all_tags(__('Sep', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Oct']            = wp_strip_all_tags(__('Oct', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Nov']            = wp_strip_all_tags(__('Nov', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Dec']            = wp_strip_all_tags(__('Dec', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Sunday']         = wp_strip_all_tags(__('Sunday', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Monday']         = wp_strip_all_tags(__('Monday', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Tuesday']        = wp_strip_all_tags(__('Tuesday', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Wednesday']      = wp_strip_all_tags(__('Wednesday', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Thursday']       = wp_strip_all_tags(__('Thursday', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Friday']         = wp_strip_all_tags(__('Friday', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Saturday']       = wp_strip_all_tags(__('Saturday', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Sun']            = wp_strip_all_tags(__('Sun', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Mon']            = wp_strip_all_tags(__('Mon', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Tue']            = wp_strip_all_tags(__('Tue', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Wed']            = wp_strip_all_tags(__('Wed', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Thu']            = wp_strip_all_tags(__('Thu', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Fri']            = wp_strip_all_tags(__('Fri', 'event_espresso'));
-        EE_Registry::$i18n_js_strings['Sat']            = wp_strip_all_tags(__('Sat', 'event_espresso'));
-    }
-
-
-    /**
-     *        load enhanced xdebug styles for ppl with failing eyesight
-     *
-     * @return        void
-     */
-    public function add_xdebug_style()
-    {
-        echo '<style>.xdebug-error { font-size:1.5em; }</style>';
-    }
-
-
-    /************************/
-    /** LIST TABLE METHODS **/
-    /************************/
-    /**
-     * this sets up the list table if the current view requires it.
-     *
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    protected function _set_list_table()
-    {
-        // first is this a list_table view?
-        if (! isset($this->_route_config['list_table'])) {
-            return;
-        } //not a list_table view so get out.
-        // list table functions are per view specific (because some admin pages might have more than one list table!)
-        $list_table_view = '_set_list_table_views_' . $this->_req_action;
-        if (! method_exists($this, $list_table_view) || $this->{$list_table_view}() === false) {
-            // user error msg
-            $error_msg = esc_html__(
-                'An error occurred. The requested list table views could not be found.',
-                'event_espresso'
-            );
-            // developer error msg
-            $error_msg .= '||'
-                          . sprintf(
-                              esc_html__(
-                                  'List table views for "%s" route could not be setup. Check that you have the corresponding method, "%s" set up for defining list_table_views for this route.',
-                                  'event_espresso'
-                              ),
-                              $this->_req_action,
-                              $list_table_view
-                          );
-            throw new EE_Error($error_msg);
-        }
-        // let's provide the ability to filter the views per PAGE AND ROUTE, per PAGE, and globally
-        $this->_views = apply_filters(
-            'FHEE_list_table_views_' . $this->page_slug . '_' . $this->_req_action,
-            $this->_views
-        );
-        $this->_views = apply_filters('FHEE_list_table_views_' . $this->page_slug, $this->_views);
-        $this->_views = apply_filters('FHEE_list_table_views', $this->_views);
-        $this->_set_list_table_view();
-        $this->_set_list_table_object();
-    }
-
-
-    /**
-     * set current view for List Table
-     *
-     * @return void
-     */
-    protected function _set_list_table_view()
-    {
-        $this->_view = isset($this->_views['in_use']) ? 'in_use' : 'all';
-        $status      = $this->request->getRequestParam('status', null, 'key');
-        $this->_view = $status && array_key_exists($status, $this->_views)
-            ? $status
-            : $this->_view;
-    }
-
-
-    /**
-     * _set_list_table_object
-     * WP_List_Table objects need to be loaded fairly early so automatic stuff WP does is taken care of.
-     *
-     * @throws InvalidInterfaceException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws EE_Error
-     * @throws InvalidInterfaceException
-     */
-    protected function _set_list_table_object()
-    {
-        if (isset($this->_route_config['list_table'])) {
-            if (! class_exists($this->_route_config['list_table'])) {
-                throw new EE_Error(
-                    sprintf(
-                        esc_html__(
-                            'The %s class defined for the list table does not exist.  Please check the spelling of the class ref in the $_page_config property on %s.',
-                            'event_espresso'
-                        ),
-                        $this->_route_config['list_table'],
-                        $this->class_name
-                    )
-                );
-            }
-            $this->_list_table_object = $this->loader->getShared(
-                $this->_route_config['list_table'],
-                [
-                    $this,
-                    LoaderFactory::getShared(AdminListTableFilters::class)
-                ]
-            );
-        }
-    }
-
-
-    /**
-     * get_list_table_view_RLs - get it? View RL ?? VU-RL???  URL ??
-     *
-     * @param array $extra_query_args                     Optional. An array of extra query args to add to the generated
-     *                                                    urls.  The array should be indexed by the view it is being
-     *                                                    added to.
-     * @return array
-     */
-    public function get_list_table_view_RLs($extra_query_args = [])
-    {
-        do_action('AHEE_log', __FILE__, __FUNCTION__, '');
-        if (empty($this->_views)) {
-            $this->_views = [];
-        }
-        // cycle thru views
-        foreach ($this->_views as $key => $view) {
-            $query_args = [];
-            // check for current view
-            $this->_views[ $key ]['class']               = $this->_view === $view['slug'] ? 'current' : '';
-            $query_args['action']                        = $this->_req_action;
-            $query_args[ $this->_req_action . '_nonce' ] = wp_create_nonce($query_args['action'] . '_nonce');
-            $query_args['status']                        = $view['slug'];
-            // merge any other arguments sent in.
-            if (isset($extra_query_args[ $view['slug'] ])) {
-                foreach ($extra_query_args[ $view['slug'] ] as $extra_query_arg) {
-                    $query_args[] = $extra_query_arg;
-                }
-            }
-            $this->_views[ $key ]['url'] = EE_Admin_Page::add_query_args_and_nonce($query_args, $this->_admin_base_url);
-        }
-        return $this->_views;
-    }
-
-
-    /**
-     * _entries_per_page_dropdown
-     * generates a dropdown box for selecting the number of visible rows in an admin page list table
-     *
-     * @param int $max_entries total number of rows in the table
-     * @return string
-     * @todo   : Note: ideally this should be added to the screen options dropdown as that would be consistent with how
-     *                         WP does it.
-     */
-    protected function _entries_per_page_dropdown($max_entries = 0)
-    {
-        do_action('AHEE_log', __FILE__, __FUNCTION__, '');
-        $values   = [10, 25, 50, 100];
-        $per_page = $this->request->getRequestParam('per_page', 10, 'int');
-        if ($max_entries) {
-            $values[] = $max_entries;
-            sort($values);
-        }
-        $entries_per_page_dropdown = '
+		// current set timezone for timezone js
+		echo '<span id="current_timezone" class="hidden">' . esc_html(EEH_DTT_Helper::get_timezone()) . '</span>';
+	}
+
+
+	/**
+	 * This function sees if there is a method for help popup content existing for the given route.  If there is then
+	 * we'll use the retrieved array to output the content using the template. For child classes: If you want to have
+	 * help popups then in your templates or your content you set "triggers" for the content using the
+	 * "_set_help_trigger('help_trigger_id')" where "help_trigger_id" is what you will use later in your custom method
+	 * for the help popup content on that page. Then in your Child_Admin_Page class you need to define a help popup
+	 * method for the content in the format "_help_popup_content_{route_name}()"  So if you are setting help content
+	 * for the
+	 * 'edit_event' route you should have a method named "_help_popup_content_edit_route". In your defined
+	 * "help_popup_content_..." method.  You must prepare and return an array in the following format array(
+	 *    'help_trigger_id' => array(
+	 *        'title' => esc_html__('localized title for popup', 'event_espresso'),
+	 *        'content' => esc_html__('localized content for popup', 'event_espresso')
+	 *    )
+	 * );
+	 * Then the EE_Admin_Parent will take care of making sure that is setup properly on the correct route.
+	 *
+	 * @param array $help_array
+	 * @param bool  $display
+	 * @return string content
+	 * @throws DomainException
+	 * @throws EE_Error
+	 */
+	protected function _set_help_popup_content($help_array = [], $display = false)
+	{
+		$content    = '';
+		$help_array = empty($help_array) ? $this->_get_help_content() : $help_array;
+		// loop through the array and setup content
+		foreach ($help_array as $trigger => $help) {
+			// make sure the array is setup properly
+			if (! isset($help['title'], $help['content'])) {
+				throw new EE_Error(
+					esc_html__(
+						'Does not look like the popup content array has been setup correctly.  Might want to double check that.  Read the comments for the _get_help_popup_content method found in "EE_Admin_Page" class',
+						'event_espresso'
+					)
+				);
+			}
+			// we're good so let's setup the template vars and then assign parsed template content to our content.
+			$template_args = [
+				'help_popup_id'      => $trigger,
+				'help_popup_title'   => $help['title'],
+				'help_popup_content' => $help['content'],
+			];
+			$content       .= EEH_Template::display_template(
+				EE_ADMIN_TEMPLATE . 'admin_help_popup.template.php',
+				$template_args,
+				true
+			);
+		}
+		if ($display) {
+			echo wp_kses($content, AllowedTags::getWithFormTags());
+			return '';
+		}
+		return $content;
+	}
+
+
+	/**
+	 * All this does is retrieve the help content array if set by the EE_Admin_Page child
+	 *
+	 * @return array properly formatted array for help popup content
+	 * @throws EE_Error
+	 */
+	private function _get_help_content()
+	{
+		// what is the method we're looking for?
+		$method_name = '_help_popup_content_' . $this->_req_action;
+		// if method doesn't exist let's get out.
+		if (! method_exists($this, $method_name)) {
+			return [];
+		}
+		// k we're good to go let's retrieve the help array
+		$help_array = $this->{$method_name}();
+		// make sure we've got an array!
+		if (! is_array($help_array)) {
+			throw new EE_Error(
+				esc_html__(
+					'Something went wrong with help popup content generation. Expecting an array and well, this ain\'t no array bub.',
+					'event_espresso'
+				)
+			);
+		}
+		return $help_array;
+	}
+
+
+	/**
+	 * EE Admin Pages can use this to set a properly formatted trigger for a help popup.
+	 * By default the trigger html is printed.  Otherwise it can be returned if the $display flag is set "false"
+	 * See comments made on the _set_help_content method for understanding other parts to the help popup tool.
+	 *
+	 * @param string  $trigger_id reference for retrieving the trigger content for the popup
+	 * @param boolean $display    if false then we return the trigger string
+	 * @param array   $dimensions an array of dimensions for the box (array(h,w))
+	 * @return string
+	 * @throws DomainException
+	 * @throws EE_Error
+	 */
+	protected function _set_help_trigger($trigger_id, $display = true, $dimensions = ['400', '640'])
+	{
+		if ($this->request->isAjax()) {
+			return '';
+		}
+		// let's check and see if there is any content set for this popup.  If there isn't then we'll include a default title and content so that developers know something needs to be corrected
+		$help_array   = $this->_get_help_content();
+		$help_content = '';
+		if (empty($help_array) || ! isset($help_array[ $trigger_id ])) {
+			$help_array[ $trigger_id ] = [
+				'title'   => esc_html__('Missing Content', 'event_espresso'),
+				'content' => esc_html__(
+					'A trigger has been set that doesn\'t have any corresponding content. Make sure you have set the help content. (see the "_set_help_popup_content" method in the EE_Admin_Page for instructions.)',
+					'event_espresso'
+				),
+			];
+			$help_content              = $this->_set_help_popup_content($help_array);
+		}
+		// let's setup the trigger
+		$content = '<a class="ee-dialog" href="?height='
+				   . esc_attr($dimensions[0])
+				   . '&width='
+				   . esc_attr($dimensions[1])
+				   . '&inlineId='
+				   . esc_attr($trigger_id)
+				   . '" target="_blank"><span class="question ee-help-popup-question"></span></a>';
+		$content .= $help_content;
+		if ($display) {
+			echo wp_kses($content, AllowedTags::getWithFormTags());
+			return '';
+		}
+		return $content;
+	}
+
+
+	/**
+	 * _add_global_screen_options
+	 * Add any extra wp_screen_options within this method using built-in WP functions/methods for doing so.
+	 * This particular method will add_screen_options on ALL EE_Admin Pages
+	 *
+	 * @link   http://chrismarslender.com/wp-tutorials/wordpress-screen-options-tutorial/
+	 *         see also WP_Screen object documents...
+	 * @link   http://codex.wordpress.org/Class_Reference/WP_Screen
+	 * @abstract
+	 * @return void
+	 */
+	private function _add_global_screen_options()
+	{
+	}
+
+
+	/**
+	 * _add_global_feature_pointers
+	 * This method is used for implementing any "feature pointers" (using built-in WP styling js).
+	 * This particular method will implement feature pointers for ALL EE_Admin pages.
+	 * Note: this is just a placeholder for now.  Implementation will come down the road
+	 *
+	 * @see    WP_Internal_Pointers class in wp-admin/includes/template.php for example (its a final class so can't be
+	 *         extended) also see:
+	 * @link   http://eamann.com/tech/wordpress-portland/
+	 * @abstract
+	 * @return void
+	 */
+	private function _add_global_feature_pointers()
+	{
+	}
+
+
+	/**
+	 * load_global_scripts_styles
+	 * The scripts and styles enqueued in here will be loaded on every EE Admin page
+	 *
+	 * @return void
+	 */
+	public function load_global_scripts_styles()
+	{
+		// add debugging styles
+		if (WP_DEBUG) {
+			add_action('admin_head', [$this, 'add_xdebug_style']);
+		}
+		// taking care of metaboxes
+		if (
+			empty($this->_cpt_route)
+			&& (isset($this->_route_config['metaboxes']) || isset($this->_route_config['has_metaboxes']))
+		) {
+			wp_enqueue_script('dashboard');
+		}
+
+		wp_enqueue_script(JqueryAssetManager::JS_HANDLE_JQUERY_UI_TOUCH_PUNCH);
+		wp_enqueue_script(EspressoLegacyAdminAssetManager::JS_HANDLE_EE_ADMIN);
+		// LOCALIZED DATA
+		// localize script for ajax lazy loading
+		wp_localize_script(
+			EspressoLegacyAdminAssetManager::JS_HANDLE_EE_ADMIN,
+			'eeLazyLoadingContainers',
+			apply_filters(
+				'FHEE__EE_Admin_Page_Core__load_global_scripts_styles__loader_containers',
+				['espresso_news_post_box_content']
+			)
+		);
+		StatusChangeNotice::loadAssets();
+
+		add_filter(
+			'admin_body_class',
+			function ($classes) {
+				if (strpos($classes, 'espresso-admin') === false) {
+					$classes .= ' espresso-admin';
+				}
+				return $classes;
+			}
+		);
+	}
+
+
+	/**
+	 *        admin_footer_scripts_eei18n_js_strings
+	 *
+	 * @return        void
+	 */
+	public function admin_footer_scripts_eei18n_js_strings()
+	{
+		EE_Registry::$i18n_js_strings['ajax_url']       = WP_AJAX_URL;
+		EE_Registry::$i18n_js_strings['confirm_delete'] = wp_strip_all_tags(
+			__(
+				'Are you absolutely sure you want to delete this item?\nThis action will delete ALL DATA associated with this item!!!\nThis can NOT be undone!!!',
+				'event_espresso'
+			)
+		);
+		EE_Registry::$i18n_js_strings['January']        = wp_strip_all_tags(__('January', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['February']       = wp_strip_all_tags(__('February', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['March']          = wp_strip_all_tags(__('March', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['April']          = wp_strip_all_tags(__('April', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['May']            = wp_strip_all_tags(__('May', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['June']           = wp_strip_all_tags(__('June', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['July']           = wp_strip_all_tags(__('July', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['August']         = wp_strip_all_tags(__('August', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['September']      = wp_strip_all_tags(__('September', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['October']        = wp_strip_all_tags(__('October', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['November']       = wp_strip_all_tags(__('November', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['December']       = wp_strip_all_tags(__('December', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Jan']            = wp_strip_all_tags(__('Jan', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Feb']            = wp_strip_all_tags(__('Feb', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Mar']            = wp_strip_all_tags(__('Mar', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Apr']            = wp_strip_all_tags(__('Apr', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['May']            = wp_strip_all_tags(__('May', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Jun']            = wp_strip_all_tags(__('Jun', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Jul']            = wp_strip_all_tags(__('Jul', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Aug']            = wp_strip_all_tags(__('Aug', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Sep']            = wp_strip_all_tags(__('Sep', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Oct']            = wp_strip_all_tags(__('Oct', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Nov']            = wp_strip_all_tags(__('Nov', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Dec']            = wp_strip_all_tags(__('Dec', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Sunday']         = wp_strip_all_tags(__('Sunday', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Monday']         = wp_strip_all_tags(__('Monday', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Tuesday']        = wp_strip_all_tags(__('Tuesday', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Wednesday']      = wp_strip_all_tags(__('Wednesday', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Thursday']       = wp_strip_all_tags(__('Thursday', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Friday']         = wp_strip_all_tags(__('Friday', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Saturday']       = wp_strip_all_tags(__('Saturday', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Sun']            = wp_strip_all_tags(__('Sun', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Mon']            = wp_strip_all_tags(__('Mon', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Tue']            = wp_strip_all_tags(__('Tue', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Wed']            = wp_strip_all_tags(__('Wed', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Thu']            = wp_strip_all_tags(__('Thu', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Fri']            = wp_strip_all_tags(__('Fri', 'event_espresso'));
+		EE_Registry::$i18n_js_strings['Sat']            = wp_strip_all_tags(__('Sat', 'event_espresso'));
+	}
+
+
+	/**
+	 *        load enhanced xdebug styles for ppl with failing eyesight
+	 *
+	 * @return        void
+	 */
+	public function add_xdebug_style()
+	{
+		echo '<style>.xdebug-error { font-size:1.5em; }</style>';
+	}
+
+
+	/************************/
+	/** LIST TABLE METHODS **/
+	/************************/
+	/**
+	 * this sets up the list table if the current view requires it.
+	 *
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	protected function _set_list_table()
+	{
+		// first is this a list_table view?
+		if (! isset($this->_route_config['list_table'])) {
+			return;
+		} //not a list_table view so get out.
+		// list table functions are per view specific (because some admin pages might have more than one list table!)
+		$list_table_view = '_set_list_table_views_' . $this->_req_action;
+		if (! method_exists($this, $list_table_view) || $this->{$list_table_view}() === false) {
+			// user error msg
+			$error_msg = esc_html__(
+				'An error occurred. The requested list table views could not be found.',
+				'event_espresso'
+			);
+			// developer error msg
+			$error_msg .= '||'
+						  . sprintf(
+							  esc_html__(
+								  'List table views for "%s" route could not be setup. Check that you have the corresponding method, "%s" set up for defining list_table_views for this route.',
+								  'event_espresso'
+							  ),
+							  $this->_req_action,
+							  $list_table_view
+						  );
+			throw new EE_Error($error_msg);
+		}
+		// let's provide the ability to filter the views per PAGE AND ROUTE, per PAGE, and globally
+		$this->_views = apply_filters(
+			'FHEE_list_table_views_' . $this->page_slug . '_' . $this->_req_action,
+			$this->_views
+		);
+		$this->_views = apply_filters('FHEE_list_table_views_' . $this->page_slug, $this->_views);
+		$this->_views = apply_filters('FHEE_list_table_views', $this->_views);
+		$this->_set_list_table_view();
+		$this->_set_list_table_object();
+	}
+
+
+	/**
+	 * set current view for List Table
+	 *
+	 * @return void
+	 */
+	protected function _set_list_table_view()
+	{
+		$this->_view = isset($this->_views['in_use']) ? 'in_use' : 'all';
+		$status      = $this->request->getRequestParam('status', null, 'key');
+		$this->_view = $status && array_key_exists($status, $this->_views)
+			? $status
+			: $this->_view;
+	}
+
+
+	/**
+	 * _set_list_table_object
+	 * WP_List_Table objects need to be loaded fairly early so automatic stuff WP does is taken care of.
+	 *
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws EE_Error
+	 * @throws InvalidInterfaceException
+	 */
+	protected function _set_list_table_object()
+	{
+		if (isset($this->_route_config['list_table'])) {
+			if (! class_exists($this->_route_config['list_table'])) {
+				throw new EE_Error(
+					sprintf(
+						esc_html__(
+							'The %s class defined for the list table does not exist.  Please check the spelling of the class ref in the $_page_config property on %s.',
+							'event_espresso'
+						),
+						$this->_route_config['list_table'],
+						$this->class_name
+					)
+				);
+			}
+			$this->_list_table_object = $this->loader->getShared(
+				$this->_route_config['list_table'],
+				[
+					$this,
+					LoaderFactory::getShared(AdminListTableFilters::class)
+				]
+			);
+		}
+	}
+
+
+	/**
+	 * get_list_table_view_RLs - get it? View RL ?? VU-RL???  URL ??
+	 *
+	 * @param array $extra_query_args                     Optional. An array of extra query args to add to the generated
+	 *                                                    urls.  The array should be indexed by the view it is being
+	 *                                                    added to.
+	 * @return array
+	 */
+	public function get_list_table_view_RLs($extra_query_args = [])
+	{
+		do_action('AHEE_log', __FILE__, __FUNCTION__, '');
+		if (empty($this->_views)) {
+			$this->_views = [];
+		}
+		// cycle thru views
+		foreach ($this->_views as $key => $view) {
+			$query_args = [];
+			// check for current view
+			$this->_views[ $key ]['class']               = $this->_view === $view['slug'] ? 'current' : '';
+			$query_args['action']                        = $this->_req_action;
+			$query_args[ $this->_req_action . '_nonce' ] = wp_create_nonce($query_args['action'] . '_nonce');
+			$query_args['status']                        = $view['slug'];
+			// merge any other arguments sent in.
+			if (isset($extra_query_args[ $view['slug'] ])) {
+				foreach ($extra_query_args[ $view['slug'] ] as $extra_query_arg) {
+					$query_args[] = $extra_query_arg;
+				}
+			}
+			$this->_views[ $key ]['url'] = EE_Admin_Page::add_query_args_and_nonce($query_args, $this->_admin_base_url);
+		}
+		return $this->_views;
+	}
+
+
+	/**
+	 * _entries_per_page_dropdown
+	 * generates a dropdown box for selecting the number of visible rows in an admin page list table
+	 *
+	 * @param int $max_entries total number of rows in the table
+	 * @return string
+	 * @todo   : Note: ideally this should be added to the screen options dropdown as that would be consistent with how
+	 *                         WP does it.
+	 */
+	protected function _entries_per_page_dropdown($max_entries = 0)
+	{
+		do_action('AHEE_log', __FILE__, __FUNCTION__, '');
+		$values   = [10, 25, 50, 100];
+		$per_page = $this->request->getRequestParam('per_page', 10, 'int');
+		if ($max_entries) {
+			$values[] = $max_entries;
+			sort($values);
+		}
+		$entries_per_page_dropdown = '
 			<div id="entries-per-page-dv" class="alignleft actions">
 				<label class="hide-if-no-js">
 					Show
 					<select id="entries-per-page-slct" name="entries-per-page-slct">';
-        foreach ($values as $value) {
-            if ($value < $max_entries) {
-                $selected                  = $value === $per_page ? ' selected="' . $per_page . '"' : '';
-                $entries_per_page_dropdown .= '
+		foreach ($values as $value) {
+			if ($value < $max_entries) {
+				$selected                  = $value === $per_page ? ' selected="' . $per_page . '"' : '';
+				$entries_per_page_dropdown .= '
 						<option value="' . $value . '"' . $selected . '>' . $value . '&nbsp;&nbsp;</option>';
-            }
-        }
-        $selected                  = $max_entries === $per_page ? ' selected="' . $per_page . '"' : '';
-        $entries_per_page_dropdown .= '
+			}
+		}
+		$selected                  = $max_entries === $per_page ? ' selected="' . $per_page . '"' : '';
+		$entries_per_page_dropdown .= '
 						<option value="' . $max_entries . '"' . $selected . '>All&nbsp;&nbsp;</option>';
-        $entries_per_page_dropdown .= '
+		$entries_per_page_dropdown .= '
 					</select>
 					entries
 				</label>
 				<input id="entries-per-page-btn" class="button button--secondary" type="submit" value="Go" >
 			</div>
 		';
-        return $entries_per_page_dropdown;
-    }
-
-
-    /**
-     *        _set_search_attributes
-     *
-     * @return        void
-     */
-    public function _set_search_attributes()
-    {
-        $this->_template_args['search']['btn_label'] = sprintf(
-            esc_html__('Search %s', 'event_espresso'),
-            empty($this->_search_btn_label) ? $this->page_label
-                : $this->_search_btn_label
-        );
-        $this->_template_args['search']['callback']  = 'search_' . $this->page_slug;
-    }
-
-
-
-    /*** END LIST TABLE METHODS **/
-
-    /**
-     * @return void
-     * @throws EE_Error
-     */
-    public function addRegisteredMetaBoxes()
-    {
-        remove_action('add_meta_boxes', [$this, 'addRegisteredMetaBoxes'], 99);
-        $this->_add_registered_meta_boxes();
-    }
-
-
-    /**
-     * _add_registered_metaboxes
-     *  this loads any registered metaboxes via the 'metaboxes' index in the _page_config property array.
-     *
-     * @link   http://codex.wordpress.org/Function_Reference/add_meta_box
-     * @return void
-     * @throws EE_Error
-     */
-    private function _add_registered_meta_boxes()
-    {
-        // we only add meta boxes if the page_route calls for it
-        if (
-            is_array($this->_route_config)
-            && isset($this->_route_config['metaboxes'])
-            && is_array($this->_route_config['metaboxes'])
-        ) {
-            // this simply loops through the callbacks provided
-            // and checks if there is a corresponding callback registered by the child
-            // if there is then we go ahead and process the metabox loader.
-            foreach ($this->_route_config['metaboxes'] as $key => $metabox_callback) {
-                // first check for Closures
-                if ($metabox_callback instanceof Closure) {
-                    $result = $metabox_callback();
-                } elseif (is_callable($metabox_callback)) {
-                    $result = call_user_func($metabox_callback);
-                } elseif (method_exists($this, $metabox_callback)) {
-                    $result = $this->{$metabox_callback}();
-                } else {
-                    $result = false;
-                }
-                if ($result === false) {
-                    // user error msg
-                    $error_msg = esc_html__(
-                        'An error occurred. The  requested metabox could not be found.',
-                        'event_espresso'
-                    );
-                    // developer error msg
-                    $error_msg .= '||'
-                                  . sprintf(
-                                      esc_html__(
-                                          'The metabox with the string "%s" could not be called. Check that the spelling for method names and actions in the "_page_config[\'metaboxes\']" array are all correct.',
-                                          'event_espresso'
-                                      ),
-                                      $metabox_callback
-                                  );
-                    throw new EE_Error($error_msg);
-                }
-                unset($this->_route_config['metaboxes'][ $key ]);
-            }
-        }
-    }
-
-
-    /**
-     * _add_screen_columns
-     * This will check the _page_config array and if there is "columns" key index indicated, we'll set the template as
-     * the dynamic column template and we'll setup the column options for the page.
-     *
-     * @return void
-     */
-    private function _add_screen_columns()
-    {
-        if (
-            is_array($this->_route_config)
-            && isset($this->_route_config['columns'])
-            && is_array($this->_route_config['columns'])
-            && count($this->_route_config['columns']) === 2
-        ) {
-            add_screen_option(
-                'layout_columns',
-                [
-                    'max'     => (int) $this->_route_config['columns'][0],
-                    'default' => (int) $this->_route_config['columns'][1],
-                ]
-            );
-            $this->_template_args['num_columns']                 = $this->_route_config['columns'][0];
-            $screen_id                                           = $this->_current_screen->id;
-            $screen_columns                                      = (int) get_user_option("screen_layout_{$screen_id}");
-            $total_columns                                       = ! empty($screen_columns)
-                ? $screen_columns
-                : $this->_route_config['columns'][1];
-            $this->_template_args['current_screen_widget_class'] = 'columns-' . $total_columns;
-            $this->_template_args['current_page']                = $this->_wp_page_slug;
-            $this->_template_args['screen']                      = $this->_current_screen;
-            $this->_column_template_path                         = EE_ADMIN_TEMPLATE
-                                                                   . 'admin_details_metabox_column_wrapper.template.php';
-            // finally if we don't have has_metaboxes set in the route config
-            // let's make sure it IS set other wise the necessary hidden fields for this won't be loaded.
-            $this->_route_config['has_metaboxes'] = true;
-        }
-    }
-
-
-
-    /** GLOBALLY AVAILABLE METABOXES **/
-
-
-    /**
-     * In this section we put any globally available EE metaboxes for all EE Admin pages.  They are called by simply
-     * referencing the callback in the _page_config array property.  This way you can be very specific about what pages
-     * these get loaded on.
-     */
-    private function _espresso_news_post_box()
-    {
-        $news_box_title = apply_filters(
-            'FHEE__EE_Admin_Page___espresso_news_post_box__news_box_title',
-            esc_html__('New @ Event Espresso', 'event_espresso')
-        );
-        $this->addMetaBox(
-            'espresso_news_post_box',
-            $news_box_title,
-            [
-                $this,
-                'espresso_news_post_box',
-            ],
-            $this->_wp_page_slug,
-            'side',
-            'low'
-        );
-    }
-
-
-    /**
-     * Code for setting up espresso ratings request metabox.
-     */
-    protected function _espresso_ratings_request()
-    {
-        if (! apply_filters('FHEE_show_ratings_request_meta_box', true)) {
-            return;
-        }
-        $ratings_box_title = apply_filters(
-            'FHEE__EE_Admin_Page___espresso_news_post_box__news_box_title',
-            esc_html__('Keep Event Espresso Decaf Free', 'event_espresso')
-        );
-        $this->addMetaBox(
-            'espresso_ratings_request',
-            $ratings_box_title,
-            [
-                $this,
-                'espresso_ratings_request',
-            ],
-            $this->_wp_page_slug,
-            'side'
-        );
-    }
-
-
-    /**
-     * Code for setting up espresso ratings request metabox content.
-     *
-     * @throws DomainException
-     */
-    public function espresso_ratings_request()
-    {
-        EEH_Template::display_template(EE_ADMIN_TEMPLATE . 'espresso_ratings_request_content.template.php');
-    }
-
-
-    public static function cached_rss_display($rss_id, $url)
-    {
-        $loading   = '<p class="widget-loading hide-if-no-js">'
-                     . esc_html__('Loading&#8230;', 'event_espresso')
-                     . '</p><p class="hide-if-js">'
-                     . esc_html__('This widget requires JavaScript.', 'event_espresso')
-                     . '</p>';
-        $pre       = '<div class="espresso-rss-display">' . "\n\t";
-        $pre       .= '<span id="' . esc_attr($rss_id) . '_url" class="hidden">' . esc_url_raw($url) . '</span>';
-        $post      = '</div>' . "\n";
-        $cache_key = 'ee_rss_' . md5($rss_id);
-        $output    = get_transient($cache_key);
-        if ($output !== false) {
-            echo wp_kses($pre . $output . $post, AllowedTags::getWithFormTags());
-            return true;
-        }
-        if (! (defined('DOING_AJAX') && DOING_AJAX)) {
-            echo wp_kses($pre . $loading . $post, AllowedTags::getWithFormTags());
-            return false;
-        }
-        ob_start();
-        wp_widget_rss_output($url, ['show_date' => 0, 'items' => 5]);
-        set_transient($cache_key, ob_get_flush(), 12 * HOUR_IN_SECONDS);
-        return true;
-    }
-
-
-    public function espresso_news_post_box()
-    {
-        ?>
+		return $entries_per_page_dropdown;
+	}
+
+
+	/**
+	 *        _set_search_attributes
+	 *
+	 * @return        void
+	 */
+	public function _set_search_attributes()
+	{
+		$this->_template_args['search']['btn_label'] = sprintf(
+			esc_html__('Search %s', 'event_espresso'),
+			empty($this->_search_btn_label) ? $this->page_label
+				: $this->_search_btn_label
+		);
+		$this->_template_args['search']['callback']  = 'search_' . $this->page_slug;
+	}
+
+
+
+	/*** END LIST TABLE METHODS **/
+
+	/**
+	 * @return void
+	 * @throws EE_Error
+	 */
+	public function addRegisteredMetaBoxes()
+	{
+		remove_action('add_meta_boxes', [$this, 'addRegisteredMetaBoxes'], 99);
+		$this->_add_registered_meta_boxes();
+	}
+
+
+	/**
+	 * _add_registered_metaboxes
+	 *  this loads any registered metaboxes via the 'metaboxes' index in the _page_config property array.
+	 *
+	 * @link   http://codex.wordpress.org/Function_Reference/add_meta_box
+	 * @return void
+	 * @throws EE_Error
+	 */
+	private function _add_registered_meta_boxes()
+	{
+		// we only add meta boxes if the page_route calls for it
+		if (
+			is_array($this->_route_config)
+			&& isset($this->_route_config['metaboxes'])
+			&& is_array($this->_route_config['metaboxes'])
+		) {
+			// this simply loops through the callbacks provided
+			// and checks if there is a corresponding callback registered by the child
+			// if there is then we go ahead and process the metabox loader.
+			foreach ($this->_route_config['metaboxes'] as $key => $metabox_callback) {
+				// first check for Closures
+				if ($metabox_callback instanceof Closure) {
+					$result = $metabox_callback();
+				} elseif (is_callable($metabox_callback)) {
+					$result = call_user_func($metabox_callback);
+				} elseif (method_exists($this, $metabox_callback)) {
+					$result = $this->{$metabox_callback}();
+				} else {
+					$result = false;
+				}
+				if ($result === false) {
+					// user error msg
+					$error_msg = esc_html__(
+						'An error occurred. The  requested metabox could not be found.',
+						'event_espresso'
+					);
+					// developer error msg
+					$error_msg .= '||'
+								  . sprintf(
+									  esc_html__(
+										  'The metabox with the string "%s" could not be called. Check that the spelling for method names and actions in the "_page_config[\'metaboxes\']" array are all correct.',
+										  'event_espresso'
+									  ),
+									  $metabox_callback
+								  );
+					throw new EE_Error($error_msg);
+				}
+				unset($this->_route_config['metaboxes'][ $key ]);
+			}
+		}
+	}
+
+
+	/**
+	 * _add_screen_columns
+	 * This will check the _page_config array and if there is "columns" key index indicated, we'll set the template as
+	 * the dynamic column template and we'll setup the column options for the page.
+	 *
+	 * @return void
+	 */
+	private function _add_screen_columns()
+	{
+		if (
+			is_array($this->_route_config)
+			&& isset($this->_route_config['columns'])
+			&& is_array($this->_route_config['columns'])
+			&& count($this->_route_config['columns']) === 2
+		) {
+			add_screen_option(
+				'layout_columns',
+				[
+					'max'     => (int) $this->_route_config['columns'][0],
+					'default' => (int) $this->_route_config['columns'][1],
+				]
+			);
+			$this->_template_args['num_columns']                 = $this->_route_config['columns'][0];
+			$screen_id                                           = $this->_current_screen->id;
+			$screen_columns                                      = (int) get_user_option("screen_layout_{$screen_id}");
+			$total_columns                                       = ! empty($screen_columns)
+				? $screen_columns
+				: $this->_route_config['columns'][1];
+			$this->_template_args['current_screen_widget_class'] = 'columns-' . $total_columns;
+			$this->_template_args['current_page']                = $this->_wp_page_slug;
+			$this->_template_args['screen']                      = $this->_current_screen;
+			$this->_column_template_path                         = EE_ADMIN_TEMPLATE
+																   . 'admin_details_metabox_column_wrapper.template.php';
+			// finally if we don't have has_metaboxes set in the route config
+			// let's make sure it IS set other wise the necessary hidden fields for this won't be loaded.
+			$this->_route_config['has_metaboxes'] = true;
+		}
+	}
+
+
+
+	/** GLOBALLY AVAILABLE METABOXES **/
+
+
+	/**
+	 * In this section we put any globally available EE metaboxes for all EE Admin pages.  They are called by simply
+	 * referencing the callback in the _page_config array property.  This way you can be very specific about what pages
+	 * these get loaded on.
+	 */
+	private function _espresso_news_post_box()
+	{
+		$news_box_title = apply_filters(
+			'FHEE__EE_Admin_Page___espresso_news_post_box__news_box_title',
+			esc_html__('New @ Event Espresso', 'event_espresso')
+		);
+		$this->addMetaBox(
+			'espresso_news_post_box',
+			$news_box_title,
+			[
+				$this,
+				'espresso_news_post_box',
+			],
+			$this->_wp_page_slug,
+			'side',
+			'low'
+		);
+	}
+
+
+	/**
+	 * Code for setting up espresso ratings request metabox.
+	 */
+	protected function _espresso_ratings_request()
+	{
+		if (! apply_filters('FHEE_show_ratings_request_meta_box', true)) {
+			return;
+		}
+		$ratings_box_title = apply_filters(
+			'FHEE__EE_Admin_Page___espresso_news_post_box__news_box_title',
+			esc_html__('Keep Event Espresso Decaf Free', 'event_espresso')
+		);
+		$this->addMetaBox(
+			'espresso_ratings_request',
+			$ratings_box_title,
+			[
+				$this,
+				'espresso_ratings_request',
+			],
+			$this->_wp_page_slug,
+			'side'
+		);
+	}
+
+
+	/**
+	 * Code for setting up espresso ratings request metabox content.
+	 *
+	 * @throws DomainException
+	 */
+	public function espresso_ratings_request()
+	{
+		EEH_Template::display_template(EE_ADMIN_TEMPLATE . 'espresso_ratings_request_content.template.php');
+	}
+
+
+	public static function cached_rss_display($rss_id, $url)
+	{
+		$loading   = '<p class="widget-loading hide-if-no-js">'
+					 . esc_html__('Loading&#8230;', 'event_espresso')
+					 . '</p><p class="hide-if-js">'
+					 . esc_html__('This widget requires JavaScript.', 'event_espresso')
+					 . '</p>';
+		$pre       = '<div class="espresso-rss-display">' . "\n\t";
+		$pre       .= '<span id="' . esc_attr($rss_id) . '_url" class="hidden">' . esc_url_raw($url) . '</span>';
+		$post      = '</div>' . "\n";
+		$cache_key = 'ee_rss_' . md5($rss_id);
+		$output    = get_transient($cache_key);
+		if ($output !== false) {
+			echo wp_kses($pre . $output . $post, AllowedTags::getWithFormTags());
+			return true;
+		}
+		if (! (defined('DOING_AJAX') && DOING_AJAX)) {
+			echo wp_kses($pre . $loading . $post, AllowedTags::getWithFormTags());
+			return false;
+		}
+		ob_start();
+		wp_widget_rss_output($url, ['show_date' => 0, 'items' => 5]);
+		set_transient($cache_key, ob_get_flush(), 12 * HOUR_IN_SECONDS);
+		return true;
+	}
+
+
+	public function espresso_news_post_box()
+	{
+		?>
         <div class="padding">
             <div id="espresso_news_post_box_content" class="infolinks">
                 <?php
-                // Get RSS Feed(s)
-                EE_Admin_Page::cached_rss_display(
-                    'espresso_news_post_box_content',
-                    esc_url_raw(
-                        apply_filters(
-                            'FHEE__EE_Admin_Page__espresso_news_post_box__feed_url',
-                            'https://eventespresso.com/feed/'
-                        )
-                    )
-                );
-                ?>
+				// Get RSS Feed(s)
+				EE_Admin_Page::cached_rss_display(
+					'espresso_news_post_box_content',
+					esc_url_raw(
+						apply_filters(
+							'FHEE__EE_Admin_Page__espresso_news_post_box__feed_url',
+							'https://eventespresso.com/feed/'
+						)
+					)
+				);
+				?>
             </div>
             <?php do_action('AHEE__EE_Admin_Page__espresso_news_post_box__after_content'); ?>
         </div>
         <?php
-    }
-
-
-    private function _espresso_links_post_box()
-    {
-        // Hiding until we actually have content to put in here...
-        // $this->addMetaBox('espresso_links_post_box', esc_html__('Helpful Plugin Links', 'event_espresso'), array( $this, 'espresso_links_post_box'), $this->_wp_page_slug, 'side');
-    }
-
-
-    public function espresso_links_post_box()
-    {
-        // Hiding until we actually have content to put in here...
-        // EEH_Template::display_template(
-        //     EE_ADMIN_TEMPLATE . 'admin_general_metabox_contents_espresso_links.template.php'
-        // );
-    }
-
-
-    protected function _espresso_sponsors_post_box()
-    {
-        if (apply_filters('FHEE_show_sponsors_meta_box', true)) {
-            $this->addMetaBox(
-                'espresso_sponsors_post_box',
-                esc_html__('Event Espresso Highlights', 'event_espresso'),
-                [$this, 'espresso_sponsors_post_box'],
-                $this->_wp_page_slug,
-                'side'
-            );
-        }
-    }
-
-
-    public function espresso_sponsors_post_box()
-    {
-        EEH_Template::display_template(
-            EE_ADMIN_TEMPLATE . 'admin_general_metabox_contents_espresso_sponsors.template.php'
-        );
-    }
-
-
-    /**
-     * if there is [ 'label' => [ 'publishbox' => 'some title' ]]
-     * present in the _page_config array, then we'll use that for the metabox label.
-     * Otherwise we'll just use publish
-     * (publishbox itself could be an array of labels indexed by routes)
-     *
-     * @return string
-     * @since   5.0.0.p
-     */
-    protected function getPublishBoxTitle(): string
-    {
-        $publish_box_title = esc_html__('Publish', 'event_espresso');
-        if (! empty($this->_labels['publishbox'])) {
-            if (is_array($this->_labels['publishbox'])) {
-                $publish_box_title = $this->_labels['publishbox'][ $this->_req_action ] ?? $publish_box_title;
-            } else {
-                $publish_box_title = $this->_labels['publishbox'];
-            }
-        }
-        return apply_filters(
-            'FHEE__EE_Admin_Page___publish_post_box__box_label',
-            $publish_box_title,
-            $this->_req_action,
-            $this
-        );
-    }
-
-
-    /**
-     * @throws EE_Error
-     */
-    private function _publish_post_box()
-    {
-        $title = $this->getPublishBoxTitle();
-        if (empty($this->_template_args['save_buttons'])) {
-            $this->_set_publish_post_box_vars(
-                sanitize_key($title),
-                "espresso_{$this->page_slug}_editor_overview",
-                '',
-                '',
-                true
-            );
-        } else {
-            $this->addPublishPostMetaBoxHiddenFields(
-                sanitize_key($title),
-                ['type' => 'hidden', 'value' => "espresso_{$this->page_slug}_editor_overview"]
-            );
-        }
-        $this->addMetaBox(
-            "espresso_{$this->page_slug}_editor_overview",
-            $title,
-            [$this, 'editor_overview'],
-            $this->_current_screen->id,
-            'side',
-            'high'
-        );
-    }
-
-
-    public function editor_overview()
-    {
-        /**
-         * @var string $publish_box_extra_content
-         * @var string $publish_hidden_fields
-         * @var string $publish_delete_link
-         * @var string $save_buttons
-         */
-        // if we have extra content set let's add it in if not make sure its empty
-        $this->_template_args['publish_box_extra_content'] = $this->_template_args['publish_box_extra_content'] ?? '';
-        echo EEH_Template::display_template(
-            EE_ADMIN_TEMPLATE . 'admin_details_publish_metabox.template.php',
-            $this->_template_args,
-            true
-        );
-    }
-
-
-    /** end of globally available metaboxes section **/
-
-
-    /**
-     * Sets the _template_args arguments used by the _publish_post_box shortcut
-     * Note: currently there is no validation for this.  However, if you want the delete button, the
-     * save, and save and close buttons to work properly, then you will want to include a
-     * values for the name and id arguments.
-     *
-     * @param string|null $name                     key used for the action ID (i.e. event_id)
-     * @param int|string  $id                       id attached to the item published
-     * @param string|null $delete                   page route callback for the delete action
-     * @param string|null $save_close_redirect_URL  custom URL to redirect to after Save & Close has been completed
-     * @param boolean     $both_btns                whether to display BOTH the "Save & Close" and "Save" buttons
-     *                                              or just the "Save" button
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @todo  Add in validation for name/id arguments.
-     */
-    protected function _set_publish_post_box_vars(
-        ?string $name = '',
-        $id = 0,
-        ?string $delete = '',
-        ?string $save_close_redirect_URL = '',
-        bool $both_btns = true
-    ) {
-        // if Save & Close, use a custom redirect URL or default to the main page?
-        $save_close_redirect_URL = ! empty($save_close_redirect_URL)
-            ? $save_close_redirect_URL
-            : $this->_admin_base_url;
-        // create the Save & Close and Save buttons
-        $this->_set_save_buttons($both_btns, [], [], $save_close_redirect_URL);
-        // if we have extra content set let's add it in if not make sure its empty
-        $this->_template_args['publish_box_extra_content'] = $this->_template_args['publish_box_extra_content'] ?? '';
-        if ($delete && ! empty($id) && empty($this->_template_args['publish_delete_link'])) {
-            // make sure we have a default if just true is sent.
-            $delete      = ! empty($delete) ? $delete : 'delete';
-            $this->_template_args['publish_delete_link'] = $this->get_action_link_or_button(
-                $delete,
-                $delete,
-                [$name => $id],
-                'submitdelete deletion button button--outline button--caution'
-            );
-        }
-        if (! isset($this->_template_args['publish_delete_link'])) {
-            $this->_template_args['publish_delete_link'] = '';
-        }
-        if (! empty($name) && ! empty($id)) {
-            $this->addPublishPostMetaBoxHiddenFields($name, ['type' => 'hidden', 'value' => $id]);
-        }
-        $hidden_fields = $this->_generate_admin_form_fields($this->publish_post_meta_box_hidden_fields, 'array');
-        // add hidden fields
-        $this->_template_args['publish_hidden_fields'] = $this->_template_args['publish_hidden_fields'] ?? '';
-        foreach ($hidden_fields as $hidden_field) {
-            $this->_template_args['publish_hidden_fields'] .= $hidden_field['field'] ?? '';
-        }
-    }
-
-
-    /**
-     * @param string|null $name
-     * @param int|string  $id
-     * @param string|null $delete
-     * @param string|null $save_close_redirect_URL
-     * @param bool        $both_btns
-     * @throws EE_Error
-     */
-    public function set_publish_post_box_vars(
-        ?string $name = '',
-        $id = 0,
-        ?string $delete = '',
-        ?string $save_close_redirect_URL = '',
-        bool $both_btns = false
-    ) {
-        $this->_set_publish_post_box_vars($name, $id, $delete, $save_close_redirect_URL, $both_btns);
-    }
-
-
-    protected function addPublishPostMetaBoxHiddenFields(string $field_name, array $field_attributes)
-    {
-        $this->publish_post_meta_box_hidden_fields[ $field_name ] = $field_attributes;
-    }
-
-
-    /**
-     * displays an error message to ppl who have javascript disabled
-     *
-     * @return void
-     */
-    private function _display_no_javascript_warning()
-    {
-        ?>
+	}
+
+
+	private function _espresso_links_post_box()
+	{
+		// Hiding until we actually have content to put in here...
+		// $this->addMetaBox('espresso_links_post_box', esc_html__('Helpful Plugin Links', 'event_espresso'), array( $this, 'espresso_links_post_box'), $this->_wp_page_slug, 'side');
+	}
+
+
+	public function espresso_links_post_box()
+	{
+		// Hiding until we actually have content to put in here...
+		// EEH_Template::display_template(
+		//     EE_ADMIN_TEMPLATE . 'admin_general_metabox_contents_espresso_links.template.php'
+		// );
+	}
+
+
+	protected function _espresso_sponsors_post_box()
+	{
+		if (apply_filters('FHEE_show_sponsors_meta_box', true)) {
+			$this->addMetaBox(
+				'espresso_sponsors_post_box',
+				esc_html__('Event Espresso Highlights', 'event_espresso'),
+				[$this, 'espresso_sponsors_post_box'],
+				$this->_wp_page_slug,
+				'side'
+			);
+		}
+	}
+
+
+	public function espresso_sponsors_post_box()
+	{
+		EEH_Template::display_template(
+			EE_ADMIN_TEMPLATE . 'admin_general_metabox_contents_espresso_sponsors.template.php'
+		);
+	}
+
+
+	/**
+	 * if there is [ 'label' => [ 'publishbox' => 'some title' ]]
+	 * present in the _page_config array, then we'll use that for the metabox label.
+	 * Otherwise we'll just use publish
+	 * (publishbox itself could be an array of labels indexed by routes)
+	 *
+	 * @return string
+	 * @since   5.0.0.p
+	 */
+	protected function getPublishBoxTitle(): string
+	{
+		$publish_box_title = esc_html__('Publish', 'event_espresso');
+		if (! empty($this->_labels['publishbox'])) {
+			if (is_array($this->_labels['publishbox'])) {
+				$publish_box_title = $this->_labels['publishbox'][ $this->_req_action ] ?? $publish_box_title;
+			} else {
+				$publish_box_title = $this->_labels['publishbox'];
+			}
+		}
+		return apply_filters(
+			'FHEE__EE_Admin_Page___publish_post_box__box_label',
+			$publish_box_title,
+			$this->_req_action,
+			$this
+		);
+	}
+
+
+	/**
+	 * @throws EE_Error
+	 */
+	private function _publish_post_box()
+	{
+		$title = $this->getPublishBoxTitle();
+		if (empty($this->_template_args['save_buttons'])) {
+			$this->_set_publish_post_box_vars(
+				sanitize_key($title),
+				"espresso_{$this->page_slug}_editor_overview",
+				'',
+				'',
+				true
+			);
+		} else {
+			$this->addPublishPostMetaBoxHiddenFields(
+				sanitize_key($title),
+				['type' => 'hidden', 'value' => "espresso_{$this->page_slug}_editor_overview"]
+			);
+		}
+		$this->addMetaBox(
+			"espresso_{$this->page_slug}_editor_overview",
+			$title,
+			[$this, 'editor_overview'],
+			$this->_current_screen->id,
+			'side',
+			'high'
+		);
+	}
+
+
+	public function editor_overview()
+	{
+		/**
+		 * @var string $publish_box_extra_content
+		 * @var string $publish_hidden_fields
+		 * @var string $publish_delete_link
+		 * @var string $save_buttons
+		 */
+		// if we have extra content set let's add it in if not make sure its empty
+		$this->_template_args['publish_box_extra_content'] = $this->_template_args['publish_box_extra_content'] ?? '';
+		echo EEH_Template::display_template(
+			EE_ADMIN_TEMPLATE . 'admin_details_publish_metabox.template.php',
+			$this->_template_args,
+			true
+		);
+	}
+
+
+	/** end of globally available metaboxes section **/
+
+
+	/**
+	 * Sets the _template_args arguments used by the _publish_post_box shortcut
+	 * Note: currently there is no validation for this.  However, if you want the delete button, the
+	 * save, and save and close buttons to work properly, then you will want to include a
+	 * values for the name and id arguments.
+	 *
+	 * @param string|null $name                     key used for the action ID (i.e. event_id)
+	 * @param int|string  $id                       id attached to the item published
+	 * @param string|null $delete                   page route callback for the delete action
+	 * @param string|null $save_close_redirect_URL  custom URL to redirect to after Save & Close has been completed
+	 * @param boolean     $both_btns                whether to display BOTH the "Save & Close" and "Save" buttons
+	 *                                              or just the "Save" button
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @todo  Add in validation for name/id arguments.
+	 */
+	protected function _set_publish_post_box_vars(
+		?string $name = '',
+		$id = 0,
+		?string $delete = '',
+		?string $save_close_redirect_URL = '',
+		bool $both_btns = true
+	) {
+		// if Save & Close, use a custom redirect URL or default to the main page?
+		$save_close_redirect_URL = ! empty($save_close_redirect_URL)
+			? $save_close_redirect_URL
+			: $this->_admin_base_url;
+		// create the Save & Close and Save buttons
+		$this->_set_save_buttons($both_btns, [], [], $save_close_redirect_URL);
+		// if we have extra content set let's add it in if not make sure its empty
+		$this->_template_args['publish_box_extra_content'] = $this->_template_args['publish_box_extra_content'] ?? '';
+		if ($delete && ! empty($id) && empty($this->_template_args['publish_delete_link'])) {
+			// make sure we have a default if just true is sent.
+			$delete      = ! empty($delete) ? $delete : 'delete';
+			$this->_template_args['publish_delete_link'] = $this->get_action_link_or_button(
+				$delete,
+				$delete,
+				[$name => $id],
+				'submitdelete deletion button button--outline button--caution'
+			);
+		}
+		if (! isset($this->_template_args['publish_delete_link'])) {
+			$this->_template_args['publish_delete_link'] = '';
+		}
+		if (! empty($name) && ! empty($id)) {
+			$this->addPublishPostMetaBoxHiddenFields($name, ['type' => 'hidden', 'value' => $id]);
+		}
+		$hidden_fields = $this->_generate_admin_form_fields($this->publish_post_meta_box_hidden_fields, 'array');
+		// add hidden fields
+		$this->_template_args['publish_hidden_fields'] = $this->_template_args['publish_hidden_fields'] ?? '';
+		foreach ($hidden_fields as $hidden_field) {
+			$this->_template_args['publish_hidden_fields'] .= $hidden_field['field'] ?? '';
+		}
+	}
+
+
+	/**
+	 * @param string|null $name
+	 * @param int|string  $id
+	 * @param string|null $delete
+	 * @param string|null $save_close_redirect_URL
+	 * @param bool        $both_btns
+	 * @throws EE_Error
+	 */
+	public function set_publish_post_box_vars(
+		?string $name = '',
+		$id = 0,
+		?string $delete = '',
+		?string $save_close_redirect_URL = '',
+		bool $both_btns = false
+	) {
+		$this->_set_publish_post_box_vars($name, $id, $delete, $save_close_redirect_URL, $both_btns);
+	}
+
+
+	protected function addPublishPostMetaBoxHiddenFields(string $field_name, array $field_attributes)
+	{
+		$this->publish_post_meta_box_hidden_fields[ $field_name ] = $field_attributes;
+	}
+
+
+	/**
+	 * displays an error message to ppl who have javascript disabled
+	 *
+	 * @return void
+	 */
+	private function _display_no_javascript_warning()
+	{
+		?>
         <noscript>
             <div id="no-js-message" class="error">
                 <p style="font-size:1.3em;">
                     <span style="color:red;"><?php esc_html_e('Warning!', 'event_espresso'); ?></span>
                     <?php esc_html_e(
-                        'Javascript is currently turned off for your browser. Javascript must be enabled in order for all of the features on this page to function properly. Please turn your javascript back on.',
-                        'event_espresso'
-                    ); ?>
+						'Javascript is currently turned off for your browser. Javascript must be enabled in order for all of the features on this page to function properly. Please turn your javascript back on.',
+						'event_espresso'
+					); ?>
                 </p>
             </div>
         </noscript>
         <?php
-    }
-
-
-    /**
-     * displays espresso success and/or error notices
-     *
-     * @return void
-     */
-    protected function _display_espresso_notices()
-    {
-        $notices = $this->_get_transient(true);
-        echo stripslashes($notices);
-    }
-
-
-    /**
-     * spinny things pacify the masses
-     *
-     * @return void
-     */
-    protected function _add_admin_page_ajax_loading_img()
-    {
-        ?>
+	}
+
+
+	/**
+	 * displays espresso success and/or error notices
+	 *
+	 * @return void
+	 */
+	protected function _display_espresso_notices()
+	{
+		$notices = $this->_get_transient(true);
+		echo stripslashes($notices);
+	}
+
+
+	/**
+	 * spinny things pacify the masses
+	 *
+	 * @return void
+	 */
+	protected function _add_admin_page_ajax_loading_img()
+	{
+		?>
         <div id="espresso-ajax-loading" class="ajax-loading-grey">
             <span class="ee-spinner ee-spin"></span><span class="hidden"><?php
-                esc_html_e('loading...', 'event_espresso'); ?></span>
+				esc_html_e('loading...', 'event_espresso'); ?></span>
         </div>
         <?php
-    }
+	}
 
 
-    /**
-     * add admin page overlay for modal boxes
-     *
-     * @return void
-     */
-    protected function _add_admin_page_overlay()
-    {
-        ?>
+	/**
+	 * add admin page overlay for modal boxes
+	 *
+	 * @return void
+	 */
+	protected function _add_admin_page_overlay()
+	{
+		?>
         <div id="espresso-admin-page-overlay-dv" class=""></div>
         <?php
-    }
-
-
-    /**
-     * facade for $this->addMetaBox()
-     *
-     * @param string  $action        where the metabox gets displayed
-     * @param string  $title         Title of Metabox (output in metabox header)
-     * @param string  $callback      If not empty and $create_fun is set to false then we'll use a custom callback
-     *                               instead of the one created in here.
-     * @param array   $callback_args an array of args supplied for the metabox
-     * @param string  $column        what metabox column
-     * @param string  $priority      give this metabox a priority (using accepted priorities for wp meta boxes)
-     * @param boolean $create_func   default is true.  Basically we can say we don't WANT to have the runtime function
-     *                               created but just set our own callback for wp's add_meta_box.
-     * @throws DomainException
-     */
-    public function _add_admin_page_meta_box(
-        $action,
-        $title,
-        $callback,
-        $callback_args,
-        $column = 'normal',
-        $priority = 'high',
-        $create_func = true
-    ) {
-        do_action('AHEE_log', __FILE__, __FUNCTION__, $callback);
-        // if we have empty callback args and we want to automatically create the metabox callback then we need to make sure the callback args are generated.
-        if (empty($callback_args) && $create_func) {
-            $callback_args = [
-                'template_path' => $this->_template_path,
-                'template_args' => $this->_template_args,
-            ];
-        }
-        // if $create_func is true (default) then we automatically create the function for displaying the actual meta box.  If false then we take the $callback reference passed through and use it instead (so callers can define their own callback function/method if they wish)
-        $call_back_func = $create_func
-            ? static function ($post, $metabox) {
-                do_action('AHEE_log', __FILE__, __FUNCTION__, '');
-                echo EEH_Template::display_template(
-                    $metabox['args']['template_path'],
-                    $metabox['args']['template_args'],
-                    true
-                );
-            }
-            : $callback;
-        $this->addMetaBox(
-            str_replace('_', '-', $action) . '-mbox',
-            $title,
-            $call_back_func,
-            $this->_wp_page_slug,
-            $column,
-            $priority,
-            $callback_args
-        );
-    }
-
-
-    /**
-     * generates HTML wrapper for and admin details page that contains metaboxes in columns
-     *
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function display_admin_page_with_metabox_columns()
-    {
-        $this->_template_args['post_body_content']  = $this->_template_args['admin_page_content'];
-        $this->_template_args['admin_page_content'] = EEH_Template::display_template(
-            $this->_column_template_path,
-            $this->_template_args,
-            true
-        );
-        // the final wrapper
-        $this->admin_page_wrapper();
-    }
-
-
-    /**
-     * generates  HTML wrapper for an admin details page
-     *
-     * @return void
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function display_admin_page_with_sidebar()
-    {
-        $this->_display_admin_page(true);
-    }
-
-
-    /**
-     * generates  HTML wrapper for an admin details page (except no sidebar)
-     *
-     * @return void
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function display_admin_page_with_no_sidebar()
-    {
-        $this->_display_admin_page();
-    }
-
-
-    /**
-     * generates HTML wrapper for an EE about admin page (no sidebar)
-     *
-     * @return void
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function display_about_admin_page()
-    {
-        $this->_display_admin_page(false, true);
-    }
-
-
-    /**
-     * display_admin_page
-     * contains the code for actually displaying an admin page
-     *
-     * @param boolean $sidebar true with sidebar, false without
-     * @param boolean $about   use the about admin wrapper instead of the default.
-     * @return void
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    private function _display_admin_page($sidebar = false, $about = false)
-    {
-        do_action('AHEE_log', __FILE__, __FUNCTION__, '');
-        // custom remove metaboxes hook to add or remove any metaboxes to/from Admin pages.
-        do_action('AHEE__EE_Admin_Page___display_admin_page__modify_metaboxes');
-        // set current wp page slug - looks like: event-espresso_page_event_categories
-        // keep in mind "event-espresso" COULD be something else if the top level menu label has been translated.
-
-        $post_body_content = $this->_template_args['before_admin_page_content'] ?? '';
-
-        $this->_template_args['add_page_frame'] = $this->_req_action !== 'system_status'
-                                                  && $this->_req_action !== 'data_reset'
-                                                  && $this->_wp_page_slug !== 'event-espresso_page_espresso_packages'
-                                                  && strpos($post_body_content, 'wp-list-table') === false;
-
-        $this->_template_args['current_page']                 = $this->_wp_page_slug;
-        $this->_template_args['admin_page_wrapper_div_id']    = $this->_cpt_route
-            ? 'poststuff'
-            : 'espresso-default-admin';
-        $this->_template_args['admin_page_wrapper_div_class'] = str_replace(
-                                                                    'event-espresso_page_espresso_',
-                                                                    '',
-                                                                    $this->_wp_page_slug
-                                                                ) . ' ' . $this->_req_action . '-route';
-
-        $template_path = $sidebar
-            ? EE_ADMIN_TEMPLATE . 'admin_details_wrapper.template.php'
-            : EE_ADMIN_TEMPLATE . 'admin_details_wrapper_no_sidebar.template.php';
-        if ($this->request->isAjax()) {
-            $template_path = EE_ADMIN_TEMPLATE . 'admin_details_wrapper_no_sidebar_ajax.template.php';
-        }
-        $template_path = ! empty($this->_column_template_path) ? $this->_column_template_path : $template_path;
-
-        $this->_template_args['post_body_content']         = $this->_template_args['admin_page_content'] ?? '';
-        $this->_template_args['before_admin_page_content'] = $post_body_content;
-        $this->_template_args['after_admin_page_content']  = $this->_template_args['after_admin_page_content'] ?? '';
-        $this->_template_args['admin_page_content']        = EEH_Template::display_template(
-            $template_path,
-            $this->_template_args,
-            true
-        );
-        // the final template wrapper
-        $this->admin_page_wrapper($about);
-    }
-
-
-    /**
-     * This is used to display caf preview pages.
-     *
-     * @param string $utm_campaign_source what is the key used for google analytics link
-     * @param bool   $display_sidebar     whether to use the sidebar template or the full template for the page.  TRUE
-     *                                    = SHOW sidebar, FALSE = no sidebar. Default no sidebar.
-     * @return void
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @since 4.3.2
-     */
-    public function display_admin_caf_preview_page($utm_campaign_source = '', $display_sidebar = true)
-    {
-        // let's generate a default preview action button if there isn't one already present.
-        $this->_labels['buttons']['buy_now']           = esc_html__(
-            'Upgrade to Event Espresso 4 Right Now',
-            'event_espresso'
-        );
-        $buy_now_url                                   = add_query_arg(
-            [
-                'ee_ver'       => 'ee4',
-                'utm_source'   => 'ee4_plugin_admin',
-                'utm_medium'   => 'link',
-                'utm_campaign' => $utm_campaign_source,
-                'utm_content'  => 'buy_now_button',
-            ],
-            'https://eventespresso.com/pricing/'
-        );
-        $this->_template_args['preview_action_button'] = ! isset($this->_template_args['preview_action_button'])
-            ? $this->get_action_link_or_button(
-                '',
-                'buy_now',
-                [],
-                'button button--primary button--big',
-                esc_url_raw($buy_now_url),
-                true
-            )
-            : $this->_template_args['preview_action_button'];
-        $this->_template_args['admin_page_content']    = EEH_Template::display_template(
-            EE_ADMIN_TEMPLATE . 'admin_caf_full_page_preview.template.php',
-            $this->_template_args,
-            true
-        );
-        $this->_display_admin_page($display_sidebar);
-    }
-
-
-    /**
-     * display_admin_list_table_page_with_sidebar
-     * generates HTML wrapper for an admin_page with list_table
-     *
-     * @return void
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function display_admin_list_table_page_with_sidebar()
-    {
-        $this->_display_admin_list_table_page(true);
-    }
-
-
-    /**
-     * display_admin_list_table_page_with_no_sidebar
-     * generates HTML wrapper for an admin_page with list_table (but with no sidebar)
-     *
-     * @return void
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function display_admin_list_table_page_with_no_sidebar()
-    {
-        $this->_display_admin_list_table_page();
-    }
-
-
-    /**
-     * generates html wrapper for an admin_list_table page
-     *
-     * @param boolean $sidebar whether to display with sidebar or not.
-     * @return void
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    private function _display_admin_list_table_page($sidebar = false)
-    {
-        // setup search attributes
-        $this->_set_search_attributes();
-        $this->_template_args['current_page']     = $this->_wp_page_slug;
-        $template_path                            = EE_ADMIN_TEMPLATE . 'admin_list_wrapper.template.php';
-        $this->_template_args['table_url']        = $this->request->isAjax()
-            ? add_query_arg(['noheader' => 'true', 'route' => $this->_req_action], $this->_admin_base_url)
-            : add_query_arg(['route' => $this->_req_action], $this->_admin_base_url);
-        $this->_template_args['list_table']       = $this->_list_table_object;
-        $this->_template_args['current_route']    = $this->_req_action;
-        $this->_template_args['list_table_class'] = get_class($this->_list_table_object);
-        $ajax_sorting_callback                    = $this->_list_table_object->get_ajax_sorting_callback();
-        if (! empty($ajax_sorting_callback)) {
-            $sortable_list_table_form_fields = wp_nonce_field(
-                $ajax_sorting_callback . '_nonce',
-                $ajax_sorting_callback . '_nonce',
-                false,
-                false
-            );
-            $sortable_list_table_form_fields .= '<input type="hidden" id="ajax_table_sort_page" name="ajax_table_sort_page" value="'
-                                                . $this->page_slug
-                                                . '" />';
-            $sortable_list_table_form_fields .= '<input type="hidden" id="ajax_table_sort_action" name="ajax_table_sort_action" value="'
-                                                . $ajax_sorting_callback
-                                                . '" />';
-        } else {
-            $sortable_list_table_form_fields = '';
-        }
-        $this->_template_args['sortable_list_table_form_fields'] = $sortable_list_table_form_fields;
-
-        $hidden_form_fields = $this->_template_args['list_table_hidden_fields'] ?? '';
-
-        $nonce_ref          = $this->_req_action . '_nonce';
-        $hidden_form_fields .= '
+	}
+
+
+	/**
+	 * facade for $this->addMetaBox()
+	 *
+	 * @param string  $action        where the metabox gets displayed
+	 * @param string  $title         Title of Metabox (output in metabox header)
+	 * @param string  $callback      If not empty and $create_fun is set to false then we'll use a custom callback
+	 *                               instead of the one created in here.
+	 * @param array   $callback_args an array of args supplied for the metabox
+	 * @param string  $column        what metabox column
+	 * @param string  $priority      give this metabox a priority (using accepted priorities for wp meta boxes)
+	 * @param boolean $create_func   default is true.  Basically we can say we don't WANT to have the runtime function
+	 *                               created but just set our own callback for wp's add_meta_box.
+	 * @throws DomainException
+	 */
+	public function _add_admin_page_meta_box(
+		$action,
+		$title,
+		$callback,
+		$callback_args,
+		$column = 'normal',
+		$priority = 'high',
+		$create_func = true
+	) {
+		do_action('AHEE_log', __FILE__, __FUNCTION__, $callback);
+		// if we have empty callback args and we want to automatically create the metabox callback then we need to make sure the callback args are generated.
+		if (empty($callback_args) && $create_func) {
+			$callback_args = [
+				'template_path' => $this->_template_path,
+				'template_args' => $this->_template_args,
+			];
+		}
+		// if $create_func is true (default) then we automatically create the function for displaying the actual meta box.  If false then we take the $callback reference passed through and use it instead (so callers can define their own callback function/method if they wish)
+		$call_back_func = $create_func
+			? static function ($post, $metabox) {
+				do_action('AHEE_log', __FILE__, __FUNCTION__, '');
+				echo EEH_Template::display_template(
+					$metabox['args']['template_path'],
+					$metabox['args']['template_args'],
+					true
+				);
+			}
+			: $callback;
+		$this->addMetaBox(
+			str_replace('_', '-', $action) . '-mbox',
+			$title,
+			$call_back_func,
+			$this->_wp_page_slug,
+			$column,
+			$priority,
+			$callback_args
+		);
+	}
+
+
+	/**
+	 * generates HTML wrapper for and admin details page that contains metaboxes in columns
+	 *
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function display_admin_page_with_metabox_columns()
+	{
+		$this->_template_args['post_body_content']  = $this->_template_args['admin_page_content'];
+		$this->_template_args['admin_page_content'] = EEH_Template::display_template(
+			$this->_column_template_path,
+			$this->_template_args,
+			true
+		);
+		// the final wrapper
+		$this->admin_page_wrapper();
+	}
+
+
+	/**
+	 * generates  HTML wrapper for an admin details page
+	 *
+	 * @return void
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function display_admin_page_with_sidebar()
+	{
+		$this->_display_admin_page(true);
+	}
+
+
+	/**
+	 * generates  HTML wrapper for an admin details page (except no sidebar)
+	 *
+	 * @return void
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function display_admin_page_with_no_sidebar()
+	{
+		$this->_display_admin_page();
+	}
+
+
+	/**
+	 * generates HTML wrapper for an EE about admin page (no sidebar)
+	 *
+	 * @return void
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function display_about_admin_page()
+	{
+		$this->_display_admin_page(false, true);
+	}
+
+
+	/**
+	 * display_admin_page
+	 * contains the code for actually displaying an admin page
+	 *
+	 * @param boolean $sidebar true with sidebar, false without
+	 * @param boolean $about   use the about admin wrapper instead of the default.
+	 * @return void
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	private function _display_admin_page($sidebar = false, $about = false)
+	{
+		do_action('AHEE_log', __FILE__, __FUNCTION__, '');
+		// custom remove metaboxes hook to add or remove any metaboxes to/from Admin pages.
+		do_action('AHEE__EE_Admin_Page___display_admin_page__modify_metaboxes');
+		// set current wp page slug - looks like: event-espresso_page_event_categories
+		// keep in mind "event-espresso" COULD be something else if the top level menu label has been translated.
+
+		$post_body_content = $this->_template_args['before_admin_page_content'] ?? '';
+
+		$this->_template_args['add_page_frame'] = $this->_req_action !== 'system_status'
+												  && $this->_req_action !== 'data_reset'
+												  && $this->_wp_page_slug !== 'event-espresso_page_espresso_packages'
+												  && strpos($post_body_content, 'wp-list-table') === false;
+
+		$this->_template_args['current_page']                 = $this->_wp_page_slug;
+		$this->_template_args['admin_page_wrapper_div_id']    = $this->_cpt_route
+			? 'poststuff'
+			: 'espresso-default-admin';
+		$this->_template_args['admin_page_wrapper_div_class'] = str_replace(
+																	'event-espresso_page_espresso_',
+																	'',
+																	$this->_wp_page_slug
+																) . ' ' . $this->_req_action . '-route';
+
+		$template_path = $sidebar
+			? EE_ADMIN_TEMPLATE . 'admin_details_wrapper.template.php'
+			: EE_ADMIN_TEMPLATE . 'admin_details_wrapper_no_sidebar.template.php';
+		if ($this->request->isAjax()) {
+			$template_path = EE_ADMIN_TEMPLATE . 'admin_details_wrapper_no_sidebar_ajax.template.php';
+		}
+		$template_path = ! empty($this->_column_template_path) ? $this->_column_template_path : $template_path;
+
+		$this->_template_args['post_body_content']         = $this->_template_args['admin_page_content'] ?? '';
+		$this->_template_args['before_admin_page_content'] = $post_body_content;
+		$this->_template_args['after_admin_page_content']  = $this->_template_args['after_admin_page_content'] ?? '';
+		$this->_template_args['admin_page_content']        = EEH_Template::display_template(
+			$template_path,
+			$this->_template_args,
+			true
+		);
+		// the final template wrapper
+		$this->admin_page_wrapper($about);
+	}
+
+
+	/**
+	 * This is used to display caf preview pages.
+	 *
+	 * @param string $utm_campaign_source what is the key used for google analytics link
+	 * @param bool   $display_sidebar     whether to use the sidebar template or the full template for the page.  TRUE
+	 *                                    = SHOW sidebar, FALSE = no sidebar. Default no sidebar.
+	 * @return void
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @since 4.3.2
+	 */
+	public function display_admin_caf_preview_page($utm_campaign_source = '', $display_sidebar = true)
+	{
+		// let's generate a default preview action button if there isn't one already present.
+		$this->_labels['buttons']['buy_now']           = esc_html__(
+			'Upgrade to Event Espresso 4 Right Now',
+			'event_espresso'
+		);
+		$buy_now_url                                   = add_query_arg(
+			[
+				'ee_ver'       => 'ee4',
+				'utm_source'   => 'ee4_plugin_admin',
+				'utm_medium'   => 'link',
+				'utm_campaign' => $utm_campaign_source,
+				'utm_content'  => 'buy_now_button',
+			],
+			'https://eventespresso.com/pricing/'
+		);
+		$this->_template_args['preview_action_button'] = ! isset($this->_template_args['preview_action_button'])
+			? $this->get_action_link_or_button(
+				'',
+				'buy_now',
+				[],
+				'button button--primary button--big',
+				esc_url_raw($buy_now_url),
+				true
+			)
+			: $this->_template_args['preview_action_button'];
+		$this->_template_args['admin_page_content']    = EEH_Template::display_template(
+			EE_ADMIN_TEMPLATE . 'admin_caf_full_page_preview.template.php',
+			$this->_template_args,
+			true
+		);
+		$this->_display_admin_page($display_sidebar);
+	}
+
+
+	/**
+	 * display_admin_list_table_page_with_sidebar
+	 * generates HTML wrapper for an admin_page with list_table
+	 *
+	 * @return void
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function display_admin_list_table_page_with_sidebar()
+	{
+		$this->_display_admin_list_table_page(true);
+	}
+
+
+	/**
+	 * display_admin_list_table_page_with_no_sidebar
+	 * generates HTML wrapper for an admin_page with list_table (but with no sidebar)
+	 *
+	 * @return void
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function display_admin_list_table_page_with_no_sidebar()
+	{
+		$this->_display_admin_list_table_page();
+	}
+
+
+	/**
+	 * generates html wrapper for an admin_list_table page
+	 *
+	 * @param boolean $sidebar whether to display with sidebar or not.
+	 * @return void
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	private function _display_admin_list_table_page($sidebar = false)
+	{
+		// setup search attributes
+		$this->_set_search_attributes();
+		$this->_template_args['current_page']     = $this->_wp_page_slug;
+		$template_path                            = EE_ADMIN_TEMPLATE . 'admin_list_wrapper.template.php';
+		$this->_template_args['table_url']        = $this->request->isAjax()
+			? add_query_arg(['noheader' => 'true', 'route' => $this->_req_action], $this->_admin_base_url)
+			: add_query_arg(['route' => $this->_req_action], $this->_admin_base_url);
+		$this->_template_args['list_table']       = $this->_list_table_object;
+		$this->_template_args['current_route']    = $this->_req_action;
+		$this->_template_args['list_table_class'] = get_class($this->_list_table_object);
+		$ajax_sorting_callback                    = $this->_list_table_object->get_ajax_sorting_callback();
+		if (! empty($ajax_sorting_callback)) {
+			$sortable_list_table_form_fields = wp_nonce_field(
+				$ajax_sorting_callback . '_nonce',
+				$ajax_sorting_callback . '_nonce',
+				false,
+				false
+			);
+			$sortable_list_table_form_fields .= '<input type="hidden" id="ajax_table_sort_page" name="ajax_table_sort_page" value="'
+												. $this->page_slug
+												. '" />';
+			$sortable_list_table_form_fields .= '<input type="hidden" id="ajax_table_sort_action" name="ajax_table_sort_action" value="'
+												. $ajax_sorting_callback
+												. '" />';
+		} else {
+			$sortable_list_table_form_fields = '';
+		}
+		$this->_template_args['sortable_list_table_form_fields'] = $sortable_list_table_form_fields;
+
+		$hidden_form_fields = $this->_template_args['list_table_hidden_fields'] ?? '';
+
+		$nonce_ref          = $this->_req_action . '_nonce';
+		$hidden_form_fields .= '
             <input type="hidden" name="' . $nonce_ref . '" value="' . wp_create_nonce($nonce_ref) . '">';
 
-        $this->_template_args['list_table_hidden_fields'] = $hidden_form_fields;
-        // display message about search results?
-        $search                                    = $this->request->getRequestParam('s');
-        $this->_template_args['before_list_table'] .= ! empty($search)
-            ? '<p class="ee-search-results">' . sprintf(
-                esc_html__('Displaying search results for the search string: %1$s', 'event_espresso'),
-                trim($search, '%')
-            ) . '</p>'
-            : '';
-        // filter before_list_table template arg
-        $this->_template_args['before_list_table'] = apply_filters(
-            'FHEE__EE_Admin_Page___display_admin_list_table_page__before_list_table__template_arg',
-            $this->_template_args['before_list_table'],
-            $this->page_slug,
-            $this->request->requestParams(),
-            $this->_req_action
-        );
-        // convert to array and filter again
-        // arrays are easier to inject new items in a specific location,
-        // but would not be backwards compatible, so we have to add a new filter
-        $this->_template_args['before_list_table'] = implode(
-            " \n",
-            (array) apply_filters(
-                'FHEE__EE_Admin_Page___display_admin_list_table_page__before_list_table__template_args_array',
-                (array) $this->_template_args['before_list_table'],
-                $this->page_slug,
-                $this->request->requestParams(),
-                $this->_req_action
-            )
-        );
-        // filter after_list_table template arg
-        $this->_template_args['after_list_table'] = apply_filters(
-            'FHEE__EE_Admin_Page___display_admin_list_table_page__after_list_table__template_arg',
-            $this->_template_args['after_list_table'],
-            $this->page_slug,
-            $this->request->requestParams(),
-            $this->_req_action
-        );
-        // convert to array and filter again
-        // arrays are easier to inject new items in a specific location,
-        // but would not be backwards compatible, so we have to add a new filter
-        $this->_template_args['after_list_table']   = implode(
-            " \n",
-            (array) apply_filters(
-                'FHEE__EE_Admin_Page___display_admin_list_table_page__after_list_table__template_args_array',
-                (array) $this->_template_args['after_list_table'],
-                $this->page_slug,
-                $this->request->requestParams(),
-                $this->_req_action
-            )
-        );
-        $this->_template_args['admin_page_content'] = EEH_Template::display_template(
-            $template_path,
-            $this->_template_args,
-            true
-        );
-        // the final template wrapper
-        if ($sidebar) {
-            $this->display_admin_page_with_sidebar();
-        } else {
-            $this->display_admin_page_with_no_sidebar();
-        }
-    }
-
-
-    /**
-     * This just prepares a legend using the given items and the admin_details_legend.template.php file and returns the
-     * html string for the legend.
-     * $items are expected in an array in the following format:
-     * $legend_items = array(
-     *        'item_id' => array(
-     *            'icon' => 'http://url_to_icon_being_described.png',
-     *            'desc' => esc_html__('localized description of item');
-     *        )
-     * );
-     *
-     * @param array $items see above for format of array
-     * @return string html string of legend
-     * @throws DomainException
-     */
-    protected function _display_legend($items)
-    {
-        $this->_template_args['items'] = apply_filters(
-            'FHEE__EE_Admin_Page___display_legend__items',
-            (array) $items,
-            $this
-        );
-        /** @var StatusChangeNotice $status_change_notice */
-        $status_change_notice                         = $this->loader->getShared(
-            'EventEspresso\core\domain\services\admin\notices\status_change\StatusChangeNotice'
-        );
-        $this->_template_args['status_change_notice'] = $status_change_notice->display(
-            '__admin-legend',
-            $this->page_slug
-        );
-        return EEH_Template::display_template(
-            EE_ADMIN_TEMPLATE . 'admin_details_legend.template.php',
-            $this->_template_args,
-            true
-        );
-    }
-
-
-    /**
-     * This is used whenever we're DOING_AJAX to return a formatted json array that our calling javascript can expect
-     * The returned json object is created from an array in the following format:
-     * array(
-     *  'error' => FALSE, //(default FALSE), contains any errors and/or exceptions (exceptions return json early),
-     *  'success' => FALSE, //(default FALSE) - contains any special success message.
-     *  'notices' => '', // - contains any EE_Error formatted notices
-     *  'content' => 'string can be html', //this is a string of formatted content (can be html)
-     *  'data' => array() //this can be any key/value pairs that a method returns for later json parsing by the js.
-     *  We're also going to include the template args with every package (so js can pick out any specific template args
-     *  that might be included in here)
-     * )
-     * The json object is populated by whatever is set in the $_template_args property.
-     *
-     * @param bool  $sticky_notices    Used to indicate whether you want to ensure notices are added to a transient
-     *                                 instead of displayed.
-     * @param array $notices_arguments Use this to pass any additional args on to the _process_notices.
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    protected function _return_json($sticky_notices = false, $notices_arguments = [])
-    {
-        // make sure any EE_Error notices have been handled.
-        $this->_process_notices($notices_arguments, true, $sticky_notices);
-        $data = isset($this->_template_args['data']) ? $this->_template_args['data'] : [];
-        unset($this->_template_args['data']);
-        $json = [
-            'error'     => isset($this->_template_args['error']) ? $this->_template_args['error'] : false,
-            'success'   => isset($this->_template_args['success']) ? $this->_template_args['success'] : false,
-            'errors'    => isset($this->_template_args['errors']) ? $this->_template_args['errors'] : false,
-            'attention' => isset($this->_template_args['attention']) ? $this->_template_args['attention'] : false,
-            'notices'   => EE_Error::get_notices(),
-            'content'   => isset($this->_template_args['admin_page_content'])
-                ? $this->_template_args['admin_page_content'] : '',
-            'data'      => array_merge($data, ['template_args' => $this->_template_args]),
-            'isEEajax'  => true
-            // special flag so any ajax.Success methods in js can identify this return package as a EEajax package.
-        ];
-        // make sure there are no php errors or headers_sent.  Then we can set correct json header.
-        if (null === error_get_last() || ! headers_sent()) {
-            header('Content-Type: application/json; charset=UTF-8');
-        }
-        echo wp_json_encode($json);
-        exit();
-    }
-
-
-    /**
-     * Simply a wrapper for the protected method so we can call this outside the class (ONLY when doing ajax)
-     *
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function return_json()
-    {
-        if ($this->request->isAjax()) {
-            $this->_return_json();
-        } else {
-            throw new EE_Error(
-                sprintf(
-                    esc_html__('The public %s method can only be called when DOING_AJAX = TRUE', 'event_espresso'),
-                    __FUNCTION__
-                )
-            );
-        }
-    }
-
-
-    /**
-     * This provides a way for child hook classes to send along themselves by reference so methods/properties within
-     * them can be accessed by EE_Admin_child pages. This is assigned to the $_hook_obj property.
-     *
-     * @param EE_Admin_Hooks $hook_obj This will be the object for the EE_Admin_Hooks child
-     */
-    public function set_hook_object(EE_Admin_Hooks $hook_obj)
-    {
-        $this->_hook_obj = $hook_obj;
-    }
-
-
-    /**
-     *        generates  HTML wrapper with Tabbed nav for an admin page
-     *
-     * @param boolean $about whether to use the special about page wrapper or default.
-     * @return void
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function admin_page_wrapper($about = false)
-    {
-        do_action('AHEE_log', __FILE__, __FUNCTION__, '');
-        $this->_nav_tabs                          = $this->_get_main_nav_tabs();
-        $this->_template_args['nav_tabs']         = $this->_nav_tabs;
-        $this->_template_args['admin_page_title'] = $this->_admin_page_title;
-
-        $this->_template_args['before_admin_page_content'] = apply_filters(
-            "FHEE_before_admin_page_content{$this->_current_page}{$this->_current_view}",
-            $this->_template_args['before_admin_page_content'] ?? ''
-        );
-
-        $this->_template_args['after_admin_page_content'] = apply_filters(
-            "FHEE_after_admin_page_content{$this->_current_page}{$this->_current_view}",
-            $this->_template_args['after_admin_page_content'] ?? ''
-        );
-        $this->_template_args['after_admin_page_content'] .= $this->_set_help_popup_content();
-
-        if ($this->request->isAjax()) {
-            $this->_template_args['admin_page_content'] = EEH_Template::display_template(
-            // $template_path,
-                EE_ADMIN_TEMPLATE . 'admin_wrapper_ajax.template.php',
-                $this->_template_args,
-                true
-            );
-            $this->_return_json();
-        }
-        // load settings page wrapper template
-        $template_path = $about
-            ? EE_ADMIN_TEMPLATE . 'about_admin_wrapper.template.php'
-            : EE_ADMIN_TEMPLATE . 'admin_wrapper.template.php';
-
-        EEH_Template::display_template($template_path, $this->_template_args);
-    }
-
-
-    /**
-     * This returns the admin_nav tabs html using the configuration in the _nav_tabs property
-     *
-     * @return string html
-     * @throws EE_Error
-     */
-    protected function _get_main_nav_tabs()
-    {
-        // let's generate the html using the EEH_Tabbed_Content helper.
-        // We do this here so that it's possible for child classes to add in nav tabs dynamically at the last minute
-        // (rather than setting in the page_routes array)
-        return EEH_Tabbed_Content::display_admin_nav_tabs($this->_nav_tabs, $this->page_slug);
-    }
-
-
-    /**
-     *        sort nav tabs
-     *
-     * @param $a
-     * @param $b
-     * @return int
-     */
-    private function _sort_nav_tabs($a, $b)
-    {
-        if ($a['order'] === $b['order']) {
-            return 0;
-        }
-        return ($a['order'] < $b['order']) ? -1 : 1;
-    }
-
-
-    /**
-     * generates HTML for the forms used on admin pages
-     *
-     * @param array  $input_vars - array of input field details
-     * @param string $generator  indicates which generator to use: options are 'string' or 'array'
-     * @param bool   $id
-     * @return array|string
-     * @uses   EEH_Form_Fields::get_form_fields (/helper/EEH_Form_Fields.helper.php)
-     * @uses   EEH_Form_Fields::get_form_fields_array (/helper/EEH_Form_Fields.helper.php)
-     */
-    protected function _generate_admin_form_fields($input_vars = [], $generator = 'string', $id = false)
-    {
-        return $generator === 'string'
-            ? EEH_Form_Fields::get_form_fields($input_vars, $id)
-            : EEH_Form_Fields::get_form_fields_array($input_vars);
-    }
-
-
-    /**
-     * generates the "Save" and "Save & Close" buttons for edit forms
-     *
-     * @param bool             $both     if true then both buttons will be generated.  If false then just the "Save &
-     *                                   Close" button.
-     * @param array            $text     if included, generator will use the given text for the buttons ( array([0] =>
-     *                                   'Save', [1] => 'save & close')
-     * @param array            $actions  if included allows us to set the actions that each button will carry out (i.e.
-     *                                   via the "name" value in the button).  We can also use this to just dump
-     *                                   default actions by submitting some other value.
-     * @param bool|string|null $referrer if false then we just do the default action on save and close.  Other wise it
-     *                                   will use the $referrer string. IF null, then we don't do ANYTHING on save and
-     *                                   close (normal form handling).
-     */
-    protected function _set_save_buttons($both = true, $text = [], $actions = [], $referrer = null)
-    {
-        // make sure $text and $actions are in an array
-        $text          = (array) $text;
-        $actions       = (array) $actions;
-        $referrer_url  = ! empty($referrer) ? $referrer : $this->request->getServerParam('REQUEST_URI');
-        $button_text   = ! empty($text)
-            ? $text
-            : [
-                esc_html__('Save', 'event_espresso'),
-                esc_html__('Save and Close', 'event_espresso'),
-            ];
-        $default_names = ['save', 'save_and_close'];
-        $buttons       = '';
-        foreach ($button_text as $key => $button) {
-            $ref     = $default_names[ $key ];
-            $name    = ! empty($actions) ? $actions[ $key ] : $ref;
-            $buttons .= '<input type="submit" class="button button--primary ' . $ref . '" '
-                        . 'value="' . $button . '" name="' . $name . '" '
-                        . 'id="' . $this->_current_view . '_' . $ref . '" />';
-            if (! $both) {
-                break;
-            }
-        }
-        // add in a hidden index for the current page (so save and close redirects properly)
-        $buttons                              .= '<input type="hidden" id="save_and_close_referrer" name="save_and_close_referrer" value="'
-                                                 . $referrer_url
-                                                 . '" />';
-        $this->_template_args['save_buttons'] = $buttons;
-    }
-
-
-    /**
-     * Wrapper for the protected function.  Allows plugins/addons to call this to set the form tags.
-     *
-     * @param string $route
-     * @param array  $additional_hidden_fields
-     * @see   $this->_set_add_edit_form_tags() for details on params
-     * @since 4.6.0
-     */
-    public function set_add_edit_form_tags($route = '', $additional_hidden_fields = [])
-    {
-        $this->_set_add_edit_form_tags($route, $additional_hidden_fields);
-    }
-
-
-    /**
-     * set form open and close tags on add/edit pages.
-     *
-     * @param string $route                    the route you want the form to direct to
-     * @param array  $additional_hidden_fields any additional hidden fields required in the form header
-     * @return void
-     */
-    protected function _set_add_edit_form_tags($route = '', $additional_hidden_fields = [])
-    {
-        if (empty($route)) {
-            $user_msg = esc_html__(
-                'An error occurred. No action was set for this page\'s form.',
-                'event_espresso'
-            );
-            $dev_msg  = $user_msg . "\n"
-                        . sprintf(
-                            esc_html__('The $route argument is required for the %s->%s method.', 'event_espresso'),
-                            __FUNCTION__,
-                            __CLASS__
-                        );
-            EE_Error::add_error($user_msg . '||' . $dev_msg, __FILE__, __FUNCTION__, __LINE__);
-        }
-        // open form
-        $action                                            = $this->_admin_base_url;
-        $this->_template_args['before_admin_page_content'] = "
+		$this->_template_args['list_table_hidden_fields'] = $hidden_form_fields;
+		// display message about search results?
+		$search                                    = $this->request->getRequestParam('s');
+		$this->_template_args['before_list_table'] .= ! empty($search)
+			? '<p class="ee-search-results">' . sprintf(
+				esc_html__('Displaying search results for the search string: %1$s', 'event_espresso'),
+				trim($search, '%')
+			) . '</p>'
+			: '';
+		// filter before_list_table template arg
+		$this->_template_args['before_list_table'] = apply_filters(
+			'FHEE__EE_Admin_Page___display_admin_list_table_page__before_list_table__template_arg',
+			$this->_template_args['before_list_table'],
+			$this->page_slug,
+			$this->request->requestParams(),
+			$this->_req_action
+		);
+		// convert to array and filter again
+		// arrays are easier to inject new items in a specific location,
+		// but would not be backwards compatible, so we have to add a new filter
+		$this->_template_args['before_list_table'] = implode(
+			" \n",
+			(array) apply_filters(
+				'FHEE__EE_Admin_Page___display_admin_list_table_page__before_list_table__template_args_array',
+				(array) $this->_template_args['before_list_table'],
+				$this->page_slug,
+				$this->request->requestParams(),
+				$this->_req_action
+			)
+		);
+		// filter after_list_table template arg
+		$this->_template_args['after_list_table'] = apply_filters(
+			'FHEE__EE_Admin_Page___display_admin_list_table_page__after_list_table__template_arg',
+			$this->_template_args['after_list_table'],
+			$this->page_slug,
+			$this->request->requestParams(),
+			$this->_req_action
+		);
+		// convert to array and filter again
+		// arrays are easier to inject new items in a specific location,
+		// but would not be backwards compatible, so we have to add a new filter
+		$this->_template_args['after_list_table']   = implode(
+			" \n",
+			(array) apply_filters(
+				'FHEE__EE_Admin_Page___display_admin_list_table_page__after_list_table__template_args_array',
+				(array) $this->_template_args['after_list_table'],
+				$this->page_slug,
+				$this->request->requestParams(),
+				$this->_req_action
+			)
+		);
+		$this->_template_args['admin_page_content'] = EEH_Template::display_template(
+			$template_path,
+			$this->_template_args,
+			true
+		);
+		// the final template wrapper
+		if ($sidebar) {
+			$this->display_admin_page_with_sidebar();
+		} else {
+			$this->display_admin_page_with_no_sidebar();
+		}
+	}
+
+
+	/**
+	 * This just prepares a legend using the given items and the admin_details_legend.template.php file and returns the
+	 * html string for the legend.
+	 * $items are expected in an array in the following format:
+	 * $legend_items = array(
+	 *        'item_id' => array(
+	 *            'icon' => 'http://url_to_icon_being_described.png',
+	 *            'desc' => esc_html__('localized description of item');
+	 *        )
+	 * );
+	 *
+	 * @param array $items see above for format of array
+	 * @return string html string of legend
+	 * @throws DomainException
+	 */
+	protected function _display_legend($items)
+	{
+		$this->_template_args['items'] = apply_filters(
+			'FHEE__EE_Admin_Page___display_legend__items',
+			(array) $items,
+			$this
+		);
+		/** @var StatusChangeNotice $status_change_notice */
+		$status_change_notice                         = $this->loader->getShared(
+			'EventEspresso\core\domain\services\admin\notices\status_change\StatusChangeNotice'
+		);
+		$this->_template_args['status_change_notice'] = $status_change_notice->display(
+			'__admin-legend',
+			$this->page_slug
+		);
+		return EEH_Template::display_template(
+			EE_ADMIN_TEMPLATE . 'admin_details_legend.template.php',
+			$this->_template_args,
+			true
+		);
+	}
+
+
+	/**
+	 * This is used whenever we're DOING_AJAX to return a formatted json array that our calling javascript can expect
+	 * The returned json object is created from an array in the following format:
+	 * array(
+	 *  'error' => FALSE, //(default FALSE), contains any errors and/or exceptions (exceptions return json early),
+	 *  'success' => FALSE, //(default FALSE) - contains any special success message.
+	 *  'notices' => '', // - contains any EE_Error formatted notices
+	 *  'content' => 'string can be html', //this is a string of formatted content (can be html)
+	 *  'data' => array() //this can be any key/value pairs that a method returns for later json parsing by the js.
+	 *  We're also going to include the template args with every package (so js can pick out any specific template args
+	 *  that might be included in here)
+	 * )
+	 * The json object is populated by whatever is set in the $_template_args property.
+	 *
+	 * @param bool  $sticky_notices    Used to indicate whether you want to ensure notices are added to a transient
+	 *                                 instead of displayed.
+	 * @param array $notices_arguments Use this to pass any additional args on to the _process_notices.
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	protected function _return_json($sticky_notices = false, $notices_arguments = [])
+	{
+		// make sure any EE_Error notices have been handled.
+		$this->_process_notices($notices_arguments, true, $sticky_notices);
+		$data = isset($this->_template_args['data']) ? $this->_template_args['data'] : [];
+		unset($this->_template_args['data']);
+		$json = [
+			'error'     => isset($this->_template_args['error']) ? $this->_template_args['error'] : false,
+			'success'   => isset($this->_template_args['success']) ? $this->_template_args['success'] : false,
+			'errors'    => isset($this->_template_args['errors']) ? $this->_template_args['errors'] : false,
+			'attention' => isset($this->_template_args['attention']) ? $this->_template_args['attention'] : false,
+			'notices'   => EE_Error::get_notices(),
+			'content'   => isset($this->_template_args['admin_page_content'])
+				? $this->_template_args['admin_page_content'] : '',
+			'data'      => array_merge($data, ['template_args' => $this->_template_args]),
+			'isEEajax'  => true
+			// special flag so any ajax.Success methods in js can identify this return package as a EEajax package.
+		];
+		// make sure there are no php errors or headers_sent.  Then we can set correct json header.
+		if (null === error_get_last() || ! headers_sent()) {
+			header('Content-Type: application/json; charset=UTF-8');
+		}
+		echo wp_json_encode($json);
+		exit();
+	}
+
+
+	/**
+	 * Simply a wrapper for the protected method so we can call this outside the class (ONLY when doing ajax)
+	 *
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function return_json()
+	{
+		if ($this->request->isAjax()) {
+			$this->_return_json();
+		} else {
+			throw new EE_Error(
+				sprintf(
+					esc_html__('The public %s method can only be called when DOING_AJAX = TRUE', 'event_espresso'),
+					__FUNCTION__
+				)
+			);
+		}
+	}
+
+
+	/**
+	 * This provides a way for child hook classes to send along themselves by reference so methods/properties within
+	 * them can be accessed by EE_Admin_child pages. This is assigned to the $_hook_obj property.
+	 *
+	 * @param EE_Admin_Hooks $hook_obj This will be the object for the EE_Admin_Hooks child
+	 */
+	public function set_hook_object(EE_Admin_Hooks $hook_obj)
+	{
+		$this->_hook_obj = $hook_obj;
+	}
+
+
+	/**
+	 *        generates  HTML wrapper with Tabbed nav for an admin page
+	 *
+	 * @param boolean $about whether to use the special about page wrapper or default.
+	 * @return void
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function admin_page_wrapper($about = false)
+	{
+		do_action('AHEE_log', __FILE__, __FUNCTION__, '');
+		$this->_nav_tabs                          = $this->_get_main_nav_tabs();
+		$this->_template_args['nav_tabs']         = $this->_nav_tabs;
+		$this->_template_args['admin_page_title'] = $this->_admin_page_title;
+
+		$this->_template_args['before_admin_page_content'] = apply_filters(
+			"FHEE_before_admin_page_content{$this->_current_page}{$this->_current_view}",
+			$this->_template_args['before_admin_page_content'] ?? ''
+		);
+
+		$this->_template_args['after_admin_page_content'] = apply_filters(
+			"FHEE_after_admin_page_content{$this->_current_page}{$this->_current_view}",
+			$this->_template_args['after_admin_page_content'] ?? ''
+		);
+		$this->_template_args['after_admin_page_content'] .= $this->_set_help_popup_content();
+
+		if ($this->request->isAjax()) {
+			$this->_template_args['admin_page_content'] = EEH_Template::display_template(
+			// $template_path,
+				EE_ADMIN_TEMPLATE . 'admin_wrapper_ajax.template.php',
+				$this->_template_args,
+				true
+			);
+			$this->_return_json();
+		}
+		// load settings page wrapper template
+		$template_path = $about
+			? EE_ADMIN_TEMPLATE . 'about_admin_wrapper.template.php'
+			: EE_ADMIN_TEMPLATE . 'admin_wrapper.template.php';
+
+		EEH_Template::display_template($template_path, $this->_template_args);
+	}
+
+
+	/**
+	 * This returns the admin_nav tabs html using the configuration in the _nav_tabs property
+	 *
+	 * @return string html
+	 * @throws EE_Error
+	 */
+	protected function _get_main_nav_tabs()
+	{
+		// let's generate the html using the EEH_Tabbed_Content helper.
+		// We do this here so that it's possible for child classes to add in nav tabs dynamically at the last minute
+		// (rather than setting in the page_routes array)
+		return EEH_Tabbed_Content::display_admin_nav_tabs($this->_nav_tabs, $this->page_slug);
+	}
+
+
+	/**
+	 *        sort nav tabs
+	 *
+	 * @param $a
+	 * @param $b
+	 * @return int
+	 */
+	private function _sort_nav_tabs($a, $b)
+	{
+		if ($a['order'] === $b['order']) {
+			return 0;
+		}
+		return ($a['order'] < $b['order']) ? -1 : 1;
+	}
+
+
+	/**
+	 * generates HTML for the forms used on admin pages
+	 *
+	 * @param array  $input_vars - array of input field details
+	 * @param string $generator  indicates which generator to use: options are 'string' or 'array'
+	 * @param bool   $id
+	 * @return array|string
+	 * @uses   EEH_Form_Fields::get_form_fields (/helper/EEH_Form_Fields.helper.php)
+	 * @uses   EEH_Form_Fields::get_form_fields_array (/helper/EEH_Form_Fields.helper.php)
+	 */
+	protected function _generate_admin_form_fields($input_vars = [], $generator = 'string', $id = false)
+	{
+		return $generator === 'string'
+			? EEH_Form_Fields::get_form_fields($input_vars, $id)
+			: EEH_Form_Fields::get_form_fields_array($input_vars);
+	}
+
+
+	/**
+	 * generates the "Save" and "Save & Close" buttons for edit forms
+	 *
+	 * @param bool             $both     if true then both buttons will be generated.  If false then just the "Save &
+	 *                                   Close" button.
+	 * @param array            $text     if included, generator will use the given text for the buttons ( array([0] =>
+	 *                                   'Save', [1] => 'save & close')
+	 * @param array            $actions  if included allows us to set the actions that each button will carry out (i.e.
+	 *                                   via the "name" value in the button).  We can also use this to just dump
+	 *                                   default actions by submitting some other value.
+	 * @param bool|string|null $referrer if false then we just do the default action on save and close.  Other wise it
+	 *                                   will use the $referrer string. IF null, then we don't do ANYTHING on save and
+	 *                                   close (normal form handling).
+	 */
+	protected function _set_save_buttons($both = true, $text = [], $actions = [], $referrer = null)
+	{
+		// make sure $text and $actions are in an array
+		$text          = (array) $text;
+		$actions       = (array) $actions;
+		$referrer_url  = ! empty($referrer) ? $referrer : $this->request->getServerParam('REQUEST_URI');
+		$button_text   = ! empty($text)
+			? $text
+			: [
+				esc_html__('Save', 'event_espresso'),
+				esc_html__('Save and Close', 'event_espresso'),
+			];
+		$default_names = ['save', 'save_and_close'];
+		$buttons       = '';
+		foreach ($button_text as $key => $button) {
+			$ref     = $default_names[ $key ];
+			$name    = ! empty($actions) ? $actions[ $key ] : $ref;
+			$buttons .= '<input type="submit" class="button button--primary ' . $ref . '" '
+						. 'value="' . $button . '" name="' . $name . '" '
+						. 'id="' . $this->_current_view . '_' . $ref . '" />';
+			if (! $both) {
+				break;
+			}
+		}
+		// add in a hidden index for the current page (so save and close redirects properly)
+		$buttons                              .= '<input type="hidden" id="save_and_close_referrer" name="save_and_close_referrer" value="'
+												 . $referrer_url
+												 . '" />';
+		$this->_template_args['save_buttons'] = $buttons;
+	}
+
+
+	/**
+	 * Wrapper for the protected function.  Allows plugins/addons to call this to set the form tags.
+	 *
+	 * @param string $route
+	 * @param array  $additional_hidden_fields
+	 * @see   $this->_set_add_edit_form_tags() for details on params
+	 * @since 4.6.0
+	 */
+	public function set_add_edit_form_tags($route = '', $additional_hidden_fields = [])
+	{
+		$this->_set_add_edit_form_tags($route, $additional_hidden_fields);
+	}
+
+
+	/**
+	 * set form open and close tags on add/edit pages.
+	 *
+	 * @param string $route                    the route you want the form to direct to
+	 * @param array  $additional_hidden_fields any additional hidden fields required in the form header
+	 * @return void
+	 */
+	protected function _set_add_edit_form_tags($route = '', $additional_hidden_fields = [])
+	{
+		if (empty($route)) {
+			$user_msg = esc_html__(
+				'An error occurred. No action was set for this page\'s form.',
+				'event_espresso'
+			);
+			$dev_msg  = $user_msg . "\n"
+						. sprintf(
+							esc_html__('The $route argument is required for the %s->%s method.', 'event_espresso'),
+							__FUNCTION__,
+							__CLASS__
+						);
+			EE_Error::add_error($user_msg . '||' . $dev_msg, __FILE__, __FUNCTION__, __LINE__);
+		}
+		// open form
+		$action                                            = $this->_admin_base_url;
+		$this->_template_args['before_admin_page_content'] = "
             <form name='form' method='post' action='{$action}' id='{$route}_event_form' class='ee-admin-page-form' >
             ";
-        // add nonce
-        $nonce                                             =
-            wp_nonce_field($route . '_nonce', $route . '_nonce', false, false);
-        $this->_template_args['before_admin_page_content'] .= "\n\t" . $nonce;
-        // add REQUIRED form action
-        $hidden_fields = [
-            'action' => ['type' => 'hidden', 'value' => $route],
-        ];
-        // merge arrays
-        $hidden_fields = is_array($additional_hidden_fields)
-            ? array_merge($hidden_fields, $additional_hidden_fields)
-            : $hidden_fields;
-        // generate form fields
-        $form_fields = $this->_generate_admin_form_fields($hidden_fields, 'array');
-        // add fields to form
-        foreach ((array) $form_fields as $form_field) {
-            $this->_template_args['before_admin_page_content'] .= "\n\t" . $form_field['field'];
-        }
-        // close form
-        $this->_template_args['after_admin_page_content'] = '</form>';
-    }
-
-
-    /**
-     * Public Wrapper for _redirect_after_action() method since its
-     * discovered it would be useful for external code to have access.
-     *
-     * @param bool   $success
-     * @param string $what
-     * @param string $action_desc
-     * @param array  $query_args
-     * @param bool   $override_overwrite
-     * @throws EE_Error
-     * @see   EE_Admin_Page::_redirect_after_action() for params.
-     * @since 4.5.0
-     */
-    public function redirect_after_action(
-        $success = false,
-        $what = 'item',
-        $action_desc = 'processed',
-        $query_args = [],
-        $override_overwrite = false
-    ) {
-        $this->_redirect_after_action(
-            $success,
-            $what,
-            $action_desc,
-            $query_args,
-            $override_overwrite
-        );
-    }
-
-
-    /**
-     * Helper method for merging existing request data with the returned redirect url.
-     *
-     * This is typically used for redirects after an action so that if the original view was a filtered view those
-     * filters are still applied.
-     *
-     * @param array $new_route_data
-     * @return array
-     */
-    protected function mergeExistingRequestParamsWithRedirectArgs(array $new_route_data)
-    {
-        foreach ($this->request->requestParams() as $ref => $value) {
-            // unset nonces
-            if (strpos($ref, 'nonce') !== false) {
-                $this->request->unSetRequestParam($ref);
-                continue;
-            }
-            // urlencode values.
-            $value = is_array($value) ? array_map('urlencode', $value) : urlencode($value);
-            $this->request->setRequestParam($ref, $value);
-        }
-        return array_merge($this->request->requestParams(), $new_route_data);
-    }
-
-
-    /**
-     * @param int|float|string $success            - whether success was for two or more records, or just one, or none
-     * @param string           $what               - what the action was performed on
-     * @param string           $action_desc        - what was done ie: updated, deleted, etc
-     * @param array            $query_args         - an array of query_args to be added to the URL to redirect to
-     * @param BOOL             $override_overwrite - by default all EE_Error::success messages are overwritten,
-     *                                             this allows you to override this so that they show.
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    protected function _redirect_after_action(
-        $success = 0,
-        string $what = 'item',
-        string $action_desc = 'processed',
-        array $query_args = [],
-        bool $override_overwrite = false
-    ) {
-        do_action('AHEE_log', __FILE__, __FUNCTION__, '');
-        $notices = EE_Error::get_notices(false);
-        // overwrite default success messages //BUT ONLY if overwrite not overridden
-        if (! $override_overwrite || ! empty($notices['errors'])) {
-            EE_Error::overwrite_success();
-        }
-        if (! $override_overwrite && ! empty($what) && ! empty($action_desc) && empty($notices['errors'])) {
-            // how many records affected ? more than one record ? or just one ?
-            EE_Error::add_success(
-                sprintf(
-                    esc_html(
-                        _n(
-                            'The "%1$s" has been successfully %2$s.',
-                            'The "%1$s" have been successfully %2$s.',
-                            $success,
-                            'event_espresso'
-                        )
-                    ),
-                    $what,
-                    $action_desc
-                ),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-        }
-        // check that $query_args isn't something crazy
-        if (! is_array($query_args)) {
-            $query_args = [];
-        }
-        /**
-         * Allow injecting actions before the query_args are modified for possible different
-         * redirections on save and close actions
-         *
-         * @param array $query_args       The original query_args array coming into the
-         *                                method.
-         * @since 4.2.0
-         */
-        do_action(
-            "AHEE__{$this->class_name}___redirect_after_action__before_redirect_modification_{$this->_req_action}",
-            $query_args
-        );
-        // set redirect url.
-        // Note if there is a "page" index in the $query_args then we go with vanilla admin.php route,
-        // otherwise we go with whatever is set as the _admin_base_url
-        $redirect_url = isset($query_args['page']) ? admin_url('admin.php') : $this->_admin_base_url;
-        // calculate where we're going (if we have a "save and close" button pushed)
-        if (
-            $this->request->requestParamIsSet('save_and_close')
-            && $this->request->requestParamIsSet('save_and_close_referrer')
-        ) {
-            // even though we have the save_and_close referrer, we need to parse the url for the action in order to generate a nonce
-            $parsed_url = parse_url($this->request->getRequestParam('save_and_close_referrer', '', 'url'));
-            // regenerate query args array from referrer URL
-            parse_str($parsed_url['query'], $query_args);
-            // correct page and action will be in the query args now
-            $redirect_url = admin_url('admin.php');
-        }
-        // merge any default query_args set in _default_route_query_args property
-        if (! empty($this->_default_route_query_args) && ! $this->_is_UI_request) {
-            $args_to_merge = [];
-            foreach ($this->_default_route_query_args as $query_param => $query_value) {
-                // is there a wp_referer array in our _default_route_query_args property?
-                if ($query_param === 'wp_referer') {
-                    $query_value = (array) $query_value;
-                    foreach ($query_value as $reference => $value) {
-                        if (strpos($reference, 'nonce') !== false) {
-                            continue;
-                        }
-                        // finally we will override any arguments in the referer with
-                        // what might be set on the _default_route_query_args array.
-                        if (isset($this->_default_route_query_args[ $reference ])) {
-                            $args_to_merge[ $reference ] = urlencode($this->_default_route_query_args[ $reference ]);
-                        } else {
-                            $args_to_merge[ $reference ] = urlencode($value);
-                        }
-                    }
-                    continue;
-                }
-                $args_to_merge[ $query_param ] = $query_value;
-            }
-            // now let's merge these arguments but override with what was specifically sent in to the
-            // redirect.
-            $query_args = array_merge($args_to_merge, $query_args);
-        }
-        $this->_process_notices($query_args);
-        // generate redirect url
-        // if redirecting to anything other than the main page, add a nonce
-        if (isset($query_args['action'])) {
-            // manually generate wp_nonce and merge that with the query vars
-            // becuz the wp_nonce_url function wrecks havoc on some vars
-            $query_args['_wpnonce'] = wp_create_nonce($query_args['action'] . '_nonce');
-        }
-        // we're adding some hooks and filters in here for processing any things just before redirects
-        // (example: an admin page has done an insert or update and we want to run something after that).
-        do_action('AHEE_redirect_' . $this->class_name . $this->_req_action, $query_args);
-        $redirect_url = apply_filters(
-            'FHEE_redirect_' . $this->class_name . $this->_req_action,
-            EE_Admin_Page::add_query_args_and_nonce($query_args, $redirect_url),
-            $query_args
-        );
-        // check if we're doing ajax.  If we are then lets just return the results and js can handle how it wants.
-        if ($this->request->isAjax()) {
-            $default_data                    = [
-                'close'        => true,
-                'redirect_url' => $redirect_url,
-                'where'        => 'main',
-                'what'         => 'append',
-            ];
-            $this->_template_args['success'] = $success;
-            $this->_template_args['data']    = ! empty($this->_template_args['data']) ? array_merge(
-                $default_data,
-                $this->_template_args['data']
-            ) : $default_data;
-            $this->_return_json();
-        }
-        wp_safe_redirect($redirect_url);
-        exit();
-    }
-
-
-    /**
-     * process any notices before redirecting (or returning ajax request)
-     * This method sets the $this->_template_args['notices'] attribute;
-     *
-     * @param array $query_args         any query args that need to be used for notice transient ('action')
-     * @param bool  $skip_route_verify  This is typically used when we are processing notices REALLY early and
-     *                                  page_routes haven't been defined yet.
-     * @param bool  $sticky_notices     This is used to flag that regardless of whether this is doing_ajax or not, we
-     *                                  still save a transient for the notice.
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    protected function _process_notices($query_args = [], $skip_route_verify = false, $sticky_notices = true)
-    {
-        // first let's set individual error properties if doing_ajax and the properties aren't already set.
-        if ($this->request->isAjax()) {
-            $notices = EE_Error::get_notices(false);
-            if (empty($this->_template_args['success'])) {
-                $this->_template_args['success'] = isset($notices['success']) ? $notices['success'] : false;
-            }
-            if (empty($this->_template_args['errors'])) {
-                $this->_template_args['errors'] = isset($notices['errors']) ? $notices['errors'] : false;
-            }
-            if (empty($this->_template_args['attention'])) {
-                $this->_template_args['attention'] = isset($notices['attention']) ? $notices['attention'] : false;
-            }
-        }
-        $this->_template_args['notices'] = EE_Error::get_notices();
-        // IF this isn't ajax we need to create a transient for the notices using the route (however, overridden if $sticky_notices == true)
-        if (! $this->request->isAjax() || $sticky_notices) {
-            $route = isset($query_args['action']) ? $query_args['action'] : 'default';
-            $this->_add_transient(
-                $route,
-                $this->_template_args['notices'],
-                true,
-                $skip_route_verify
-            );
-        }
-    }
-
-
-    /**
-     * get_action_link_or_button
-     * returns the button html for adding, editing, or deleting an item (depending on given type)
-     *
-     * @param string $action        use this to indicate which action the url is generated with.
-     * @param string $type          accepted strings must be defined in the $_labels['button'] array(as the key)
-     *                              property.
-     * @param array  $extra_request if the button requires extra params you can include them in $key=>$value pairs.
-     * @param string $class         Use this to give the class for the button. Defaults to 'button--primary'
-     * @param string $base_url      If this is not provided
-     *                              the _admin_base_url will be used as the default for the button base_url.
-     *                              Otherwise this value will be used.
-     * @param bool   $exclude_nonce If true then no nonce will be in the generated button link.
-     * @return string
-     * @throws InvalidArgumentException
-     * @throws InvalidInterfaceException
-     * @throws InvalidDataTypeException
-     * @throws EE_Error
-     */
-    public function get_action_link_or_button(
-        $action,
-        $type = 'add',
-        $extra_request = [],
-        $class = 'button button--primary',
-        $base_url = '',
-        $exclude_nonce = false
-    ) {
-        // first let's validate the action (if $base_url is FALSE otherwise validation will happen further along)
-        if (empty($base_url) && ! isset($this->_page_routes[ $action ])) {
-            throw new EE_Error(
-                sprintf(
-                    esc_html__(
-                        'There is no page route for given action for the button.  This action was given: %s',
-                        'event_espresso'
-                    ),
-                    $action
-                )
-            );
-        }
-        if (! isset($this->_labels['buttons'][ $type ])) {
-            throw new EE_Error(
-                sprintf(
-                    esc_html__(
-                        'There is no label for the given button type (%s). Labels are set in the <code>_page_config</code> property.',
-                        'event_espresso'
-                    ),
-                    $type
-                )
-            );
-        }
-        // finally check user access for this button.
-        $has_access = $this->check_user_access($action, true);
-        if (! $has_access) {
-            return '';
-        }
-        $_base_url  = ! $base_url ? $this->_admin_base_url : $base_url;
-        $query_args = [
-            'action' => $action,
-        ];
-        // merge extra_request args but make sure our original action takes precedence and doesn't get overwritten.
-        if (! empty($extra_request)) {
-            $query_args = array_merge($extra_request, $query_args);
-        }
-        $url = EE_Admin_Page::add_query_args_and_nonce($query_args, $_base_url, false, $exclude_nonce);
-        return EEH_Template::get_button_or_link($url, $this->_labels['buttons'][ $type ], $class);
-    }
-
-
-    /**
-     * _per_page_screen_option
-     * Utility function for adding in a per_page_option in the screen_options_dropdown.
-     *
-     * @return void
-     * @throws InvalidArgumentException
-     * @throws InvalidInterfaceException
-     * @throws InvalidDataTypeException
-     */
-    protected function _per_page_screen_option()
-    {
-        $option = 'per_page';
-        $args   = [
-            'label'   => apply_filters(
-                'FHEE__EE_Admin_Page___per_page_screen_options___label',
-                $this->_admin_page_title,
-                $this
-            ),
-            'default' => (int) apply_filters(
-                'FHEE__EE_Admin_Page___per_page_screen_options__default',
-                20
-            ),
-            'option'  => $this->_current_page . '_' . $this->_current_view . '_per_page',
-        ];
-        // ONLY add the screen option if the user has access to it.
-        if ($this->check_user_access($this->_current_view, true)) {
-            add_screen_option($option, $args);
-        }
-    }
-
-
-    /**
-     * set_per_page_screen_option
-     * All this does is make sure that WordPress saves any per_page screen options (if set) for the current page.
-     * we have to do this rather than running inside the 'set-screen-options' hook because it runs earlier than
-     * admin_menu.
-     *
-     * @return void
-     */
-    private function _set_per_page_screen_options()
-    {
-        if ($this->request->requestParamIsSet('wp_screen_options')) {
-            check_admin_referer('screen-options-nonce', 'screenoptionnonce');
-            if (! $user = wp_get_current_user()) {
-                return;
-            }
-            $option = $this->request->getRequestParam('wp_screen_options[option]', '', 'key');
-            if (! $option) {
-                return;
-            }
-            $value      = $this->request->getRequestParam('wp_screen_options[value]', 0, 'int');
-            $map_option = $option;
-            $option     = str_replace('-', '_', $option);
-            switch ($map_option) {
-                case $this->_current_page . '_' . $this->_current_view . '_per_page':
-                    $max_value = apply_filters(
-                        'FHEE__EE_Admin_Page___set_per_page_screen_options__max_value',
-                        999,
-                        $this->_current_page,
-                        $this->_current_view
-                    );
-                    if ($value < 1) {
-                        return;
-                    }
-                    $value = min($value, $max_value);
-                    break;
-                default:
-                    $value = apply_filters(
-                        'FHEE__EE_Admin_Page___set_per_page_screen_options__value',
-                        false,
-                        $option,
-                        $value
-                    );
-                    if (false === $value) {
-                        return;
-                    }
-                    break;
-            }
-            update_user_meta($user->ID, $option, $value);
-            wp_safe_redirect(remove_query_arg(['pagenum', 'apage', 'paged'], wp_get_referer()));
-            exit;
-        }
-    }
-
-
-    /**
-     * This just allows for setting the $_template_args property if it needs to be set outside the object
-     *
-     * @param array $data array that will be assigned to template args.
-     */
-    public function set_template_args($data)
-    {
-        $this->_template_args = array_merge($this->_template_args, (array) $data);
-    }
-
-
-    /**
-     * This makes available the WP transient system for temporarily moving data between routes
-     *
-     * @param string $route             the route that should receive the transient
-     * @param array  $data              the data that gets sent
-     * @param bool   $notices           If this is for notices then we use this to indicate so, otherwise its just a
-     *                                  normal route transient.
-     * @param bool   $skip_route_verify Used to indicate we want to skip route verification.  This is usually ONLY used
-     *                                  when we are adding a transient before page_routes have been defined.
-     * @return void
-     * @throws EE_Error
-     */
-    protected function _add_transient($route, $data, $notices = false, $skip_route_verify = false)
-    {
-        $user_id = get_current_user_id();
-        if (! $skip_route_verify) {
-            $this->_verify_route($route);
-        }
-        // now let's set the string for what kind of transient we're setting
-        $transient = $notices
-            ? 'ee_rte_n_tx_' . $route . '_' . $user_id
-            : 'rte_tx_' . $route . '_' . $user_id;
-        $data      = $notices ? ['notices' => $data] : $data;
-        // is there already a transient for this route?  If there is then let's ADD to that transient
-        $existing = is_multisite() && is_network_admin()
-            ? get_site_transient($transient)
-            : get_transient($transient);
-        if ($existing) {
-            $data = array_merge((array) $data, (array) $existing);
-        }
-        if (is_multisite() && is_network_admin()) {
-            set_site_transient($transient, $data, 8);
-        } else {
-            set_transient($transient, $data, 8);
-        }
-    }
-
-
-    /**
-     * this retrieves the temporary transient that has been set for moving data between routes.
-     *
-     * @param bool   $notices true we get notices transient. False we just return normal route transient
-     * @param string $route
-     * @return mixed data
-     */
-    protected function _get_transient($notices = false, $route = '')
-    {
-        $user_id   = get_current_user_id();
-        $route     = ! $route ? $this->_req_action : $route;
-        $transient = $notices
-            ? 'ee_rte_n_tx_' . $route . '_' . $user_id
-            : 'rte_tx_' . $route . '_' . $user_id;
-        $data      = is_multisite() && is_network_admin()
-            ? get_site_transient($transient)
-            : get_transient($transient);
-        // delete transient after retrieval (just in case it hasn't expired);
-        if (is_multisite() && is_network_admin()) {
-            delete_site_transient($transient);
-        } else {
-            delete_transient($transient);
-        }
-        return $notices && isset($data['notices']) ? $data['notices'] : $data;
-    }
-
-
-    /**
-     * The purpose of this method is just to run garbage collection on any EE transients that might have expired but
-     * would not be called later. This will be assigned to run on a specific EE Admin page. (place the method in the
-     * default route callback on the EE_Admin page you want it run.)
-     *
-     * @return void
-     */
-    protected function _transient_garbage_collection()
-    {
-        global $wpdb;
-        // retrieve all existing transients
-        $query =
-            "SELECT option_name FROM {$wpdb->options} WHERE option_name LIKE '%rte_tx_%' OR option_name LIKE '%rte_n_tx_%'";
-        if ($results = $wpdb->get_results($query)) {
-            foreach ($results as $result) {
-                $transient = str_replace('_transient_', '', $result->option_name);
-                get_transient($transient);
-                if (is_multisite() && is_network_admin()) {
-                    get_site_transient($transient);
-                }
-            }
-        }
-    }
-
-
-    /**
-     * get_view
-     *
-     * @return string content of _view property
-     */
-    public function get_view()
-    {
-        return $this->_view;
-    }
-
-
-    /**
-     * getter for the protected $_views property
-     *
-     * @return array
-     */
-    public function get_views()
-    {
-        return $this->_views;
-    }
-
-
-    /**
-     * get_current_page
-     *
-     * @return string _current_page property value
-     */
-    public function get_current_page()
-    {
-        return $this->_current_page;
-    }
-
-
-    /**
-     * get_current_view
-     *
-     * @return string _current_view property value
-     */
-    public function get_current_view()
-    {
-        return $this->_current_view;
-    }
-
-
-    /**
-     * get_current_screen
-     *
-     * @return object The current WP_Screen object
-     */
-    public function get_current_screen()
-    {
-        return $this->_current_screen;
-    }
-
-
-    /**
-     * get_current_page_view_url
-     *
-     * @return string This returns the url for the current_page_view.
-     */
-    public function get_current_page_view_url()
-    {
-        return $this->_current_page_view_url;
-    }
-
-
-    /**
-     * just returns the Request
-     *
-     * @return RequestInterface
-     */
-    public function get_request()
-    {
-        return $this->request;
-    }
-
-
-    /**
-     * just returns the _req_data property
-     *
-     * @return array
-     */
-    public function get_request_data()
-    {
-        return $this->request->requestParams();
-    }
-
-
-    /**
-     * returns the _req_data protected property
-     *
-     * @return string
-     */
-    public function get_req_action()
-    {
-        return $this->_req_action;
-    }
-
-
-    /**
-     * @return bool  value of $_is_caf property
-     */
-    public function is_caf()
-    {
-        return $this->_is_caf;
-    }
-
-
-    /**
-     * @return mixed
-     */
-    public function default_espresso_metaboxes()
-    {
-        return $this->_default_espresso_metaboxes;
-    }
-
-
-    /**
-     * @return mixed
-     */
-    public function admin_base_url()
-    {
-        return $this->_admin_base_url;
-    }
-
-
-    /**
-     * @return mixed
-     */
-    public function wp_page_slug()
-    {
-        return $this->_wp_page_slug;
-    }
-
-
-    /**
-     * updates  espresso configuration settings
-     *
-     * @param string                   $tab
-     * @param EE_Config_Base|EE_Config $config
-     * @param string                   $file file where error occurred
-     * @param string                   $func function  where error occurred
-     * @param string                   $line line no where error occurred
-     * @return boolean
-     */
-    protected function _update_espresso_configuration($tab, $config, $file = '', $func = '', $line = '')
-    {
-        // remove any options that are NOT going to be saved with the config settings.
-        if (isset($config->core->ee_ueip_optin)) {
-            // TODO: remove the following two lines and make sure values are migrated from 3.1
-            update_option('ee_ueip_optin', $config->core->ee_ueip_optin);
-            update_option('ee_ueip_has_notified', true);
-        }
-        // and save it (note we're also doing the network save here)
-        $net_saved    = ! is_main_site() || EE_Network_Config::instance()->update_config(false, false);
-        $config_saved = EE_Config::instance()->update_espresso_config(false, false);
-        if ($config_saved && $net_saved) {
-            EE_Error::add_success(sprintf(esc_html__('"%s" have been successfully updated.', 'event_espresso'), $tab));
-            return true;
-        }
-        EE_Error::add_error(
-            sprintf(esc_html__('The "%s" were not updated.', 'event_espresso'), $tab),
-            $file,
-            $func,
-            $line
-        );
-        return false;
-    }
-
-
-    /**
-     * Returns an array to be used for EE_FOrm_Fields.helper.php's select_input as the $values argument.
-     *
-     * @return array
-     */
-    public function get_yes_no_values()
-    {
-        return $this->_yes_no_values;
-    }
-
-
-    /**
-     * @return string
-     * @throws ReflectionException
-     * @since 5.0.0.p
-     */
-    protected function _get_dir()
-    {
-        $reflector = new ReflectionClass($this->class_name);
-        return dirname($reflector->getFileName());
-    }
-
-
-    /**
-     * A helper for getting a "next link".
-     *
-     * @param string $url   The url to link to
-     * @param string $class The class to use.
-     * @return string
-     */
-    protected function _next_link($url, $class = 'dashicons dashicons-arrow-right')
-    {
-        return '<a class="' . $class . '" href="' . $url . '"></a>';
-    }
-
-
-    /**
-     * A helper for getting a "previous link".
-     *
-     * @param string $url   The url to link to
-     * @param string $class The class to use.
-     * @return string
-     */
-    protected function _previous_link($url, $class = 'dashicons dashicons-arrow-left')
-    {
-        return '<a class="' . $class . '" href="' . $url . '"></a>';
-    }
-
-
-
-
-
-
-
-    // below are some messages related methods that should be available across the EE_Admin system.  Note, these methods are NOT page specific
-
-
-    /**
-     * This processes an request to resend a registration and assumes we have a _REG_ID for doing so. So if the caller
-     * knows that the _REG_ID isn't in the req_data array but CAN obtain it, the caller should ADD the _REG_ID to the
-     * _req_data array.
-     *
-     * @return bool success/fail
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    protected function _process_resend_registration()
-    {
-        $this->_template_args['success'] = EED_Messages::process_resend($this->_req_data);
-        do_action(
-            'AHEE__EE_Admin_Page___process_resend_registration',
-            $this->_template_args['success'],
-            $this->request->requestParams()
-        );
-        return $this->_template_args['success'];
-    }
-
-
-    /**
-     * This automatically processes any payment message notifications when manual payment has been applied.
-     *
-     * @param EE_Payment $payment
-     * @return bool success/fail
-     */
-    protected function _process_payment_notification(EE_Payment $payment)
-    {
-        add_filter('FHEE__EE_Payment_Processor__process_registration_payments__display_notifications', '__return_true');
-        do_action('AHEE__EE_Admin_Page___process_admin_payment_notification', $payment);
-        $this->_template_args['success'] = apply_filters(
-            'FHEE__EE_Admin_Page___process_admin_payment_notification__success',
-            false,
-            $payment
-        );
-        return $this->_template_args['success'];
-    }
-
-
-    /**
-     * @param EEM_Base      $entity_model
-     * @param string        $entity_PK_name name of the primary key field used as a request param, ie: id, ID, etc
-     * @param string        $action         one of the EE_Admin_List_Table::ACTION_* constants: delete, restore, trash
-     * @param string        $delete_column  name of the field that denotes whether entity is trashed
-     * @param callable|null $callback       called after entity is trashed, restored, or deleted
-     * @return int|float
-     * @throws EE_Error
-     */
-    protected function trashRestoreDeleteEntities(
-        EEM_Base $entity_model,
-        $entity_PK_name,
-        $action = EE_Admin_List_Table::ACTION_DELETE,
-        $delete_column = '',
-        callable $callback = null
-    ) {
-        $entity_PK      = $entity_model->get_primary_key_field();
-        $entity_PK_name = $entity_PK_name ?: $entity_PK->get_name();
-        $entity_PK_type = $this->resolveEntityFieldDataType($entity_PK);
-        // grab ID if deleting a single entity
-        if ($this->request->requestParamIsSet($entity_PK_name)) {
-            $ID = $this->request->getRequestParam($entity_PK_name, 0, $entity_PK_type);
-            return $this->trashRestoreDeleteEntity($entity_model, $ID, $action, $delete_column, $callback) ? 1 : 0;
-        }
-        // or grab checkbox array if bulk deleting
-        $checkboxes = $this->request->getRequestParam('checkbox', [], $entity_PK_type, true);
-        if (empty($checkboxes)) {
-            return 0;
-        }
-        $success = 0;
-        $IDs     = array_keys($checkboxes);
-        // cycle thru bulk action checkboxes
-        foreach ($IDs as $ID) {
-            // increment $success
-            if ($this->trashRestoreDeleteEntity($entity_model, $ID, $action, $delete_column, $callback)) {
-                $success++;
-            }
-        }
-        $count = (int) count($checkboxes);
-        // if multiple entities were deleted successfully, then $deleted will be full count of deletions,
-        // otherwise it will be a fraction of ( actual deletions / total entities to be deleted )
-        return $success === $count ? $count : $success / $count;
-    }
-
-
-    /**
-     * @param EE_Primary_Key_Field_Base $entity_PK
-     * @return string
-     * @throws EE_Error
-     * @since   4.10.30.p
-     */
-    private function resolveEntityFieldDataType(EE_Primary_Key_Field_Base $entity_PK)
-    {
-        $entity_PK_type = $entity_PK->getSchemaType();
-        switch ($entity_PK_type) {
-            case 'boolean':
-                return 'bool';
-            case 'integer':
-                return 'int';
-            case 'number':
-                return 'float';
-            case 'string':
-                return 'string';
-        }
-        throw new RuntimeException(
-            sprintf(
-                esc_html__(
-                    '"%1$s" is an invalid schema type for the %2$s primary key.',
-                    'event_espresso'
-                ),
-                $entity_PK_type,
-                $entity_PK->get_name()
-            )
-        );
-    }
-
-
-    /**
-     * @param EEM_Base      $entity_model
-     * @param int|string    $entity_ID
-     * @param string        $action        one of the EE_Admin_List_Table::ACTION_* constants: delete, restore, trash
-     * @param string        $delete_column name of the field that denotes whether entity is trashed
-     * @param callable|null $callback      called after entity is trashed, restored, or deleted
-     * @return bool
-     */
-    protected function trashRestoreDeleteEntity(
-        EEM_Base $entity_model,
-        $entity_ID,
-        string $action,
-        string $delete_column,
-        ?callable $callback = null
-    ): bool {
-        $entity_ID = absint($entity_ID);
-        if (! $entity_ID) {
-            $this->trashRestoreDeleteError($action, $entity_model);
-        }
-        $result = 0;
-        try {
-            $entity = $entity_model->get_one_by_ID($entity_ID);
-            if (! $entity instanceof EE_Base_Class) {
-                throw new DomainException(
-                    sprintf(
-                        esc_html__(
-                            'Missing or invalid %1$s entity with ID of "%2$s" returned from db.',
-                            'event_espresso'
-                        ),
-                        str_replace('EEM_', '', $entity_model->get_this_model_name()),
-                        $entity_ID
-                    )
-                );
-            }
-            switch ($action) {
-                case EE_Admin_List_Table::ACTION_DELETE:
-                    $result = (bool) $entity->delete_permanently();
-                    break;
-                case EE_Admin_List_Table::ACTION_RESTORE:
-                    $result = $entity->delete_or_restore(false);
-                    break;
-                case EE_Admin_List_Table::ACTION_TRASH:
-                    $result = $entity->delete_or_restore();
-                    break;
-            }
-        } catch (Exception $exception) {
-            $this->trashRestoreDeleteError($action, $entity_model, $exception);
-        }
-        if (is_callable($callback)) {
-            call_user_func_array($callback, [$entity_model, $entity_ID, $action, $result, $delete_column]);
-        }
-        return $result;
-    }
-
-
-    /**
-     * @param EEM_Base $entity_model
-     * @param string   $delete_column
-     * @since 4.10.30.p
-     */
-    private function validateDeleteColumn(EEM_Base $entity_model, $delete_column)
-    {
-        if (empty($delete_column)) {
-            throw new DomainException(
-                sprintf(
-                    esc_html__(
-                        'You need to specify the name of the "delete column" on the %2$s model, in order to trash or restore an entity.',
-                        'event_espresso'
-                    ),
-                    $entity_model->get_this_model_name()
-                )
-            );
-        }
-        if (! $entity_model->has_field($delete_column)) {
-            throw new DomainException(
-                sprintf(
-                    esc_html__(
-                        'The %1$s field does not exist on the %2$s model.',
-                        'event_espresso'
-                    ),
-                    $delete_column,
-                    $entity_model->get_this_model_name()
-                )
-            );
-        }
-    }
-
-
-    /**
-     * @param EEM_Base       $entity_model
-     * @param Exception|null $exception
-     * @param string         $action
-     * @since 4.10.30.p
-     */
-    private function trashRestoreDeleteError($action, EEM_Base $entity_model, Exception $exception = null)
-    {
-        if ($exception instanceof Exception) {
-            throw new RuntimeException(
-                sprintf(
-                    esc_html__(
-                        'Could not %1$s the %2$s because the following error occurred: %3$s',
-                        'event_espresso'
-                    ),
-                    $action,
-                    $entity_model->get_this_model_name(),
-                    $exception->getMessage()
-                )
-            );
-        }
-        throw new RuntimeException(
-            sprintf(
-                esc_html__(
-                    'Could not %1$s the %2$s because an invalid ID was received.',
-                    'event_espresso'
-                ),
-                $action,
-                $entity_model->get_this_model_name()
-            )
-        );
-    }
+		// add nonce
+		$nonce                                             =
+			wp_nonce_field($route . '_nonce', $route . '_nonce', false, false);
+		$this->_template_args['before_admin_page_content'] .= "\n\t" . $nonce;
+		// add REQUIRED form action
+		$hidden_fields = [
+			'action' => ['type' => 'hidden', 'value' => $route],
+		];
+		// merge arrays
+		$hidden_fields = is_array($additional_hidden_fields)
+			? array_merge($hidden_fields, $additional_hidden_fields)
+			: $hidden_fields;
+		// generate form fields
+		$form_fields = $this->_generate_admin_form_fields($hidden_fields, 'array');
+		// add fields to form
+		foreach ((array) $form_fields as $form_field) {
+			$this->_template_args['before_admin_page_content'] .= "\n\t" . $form_field['field'];
+		}
+		// close form
+		$this->_template_args['after_admin_page_content'] = '</form>';
+	}
+
+
+	/**
+	 * Public Wrapper for _redirect_after_action() method since its
+	 * discovered it would be useful for external code to have access.
+	 *
+	 * @param bool   $success
+	 * @param string $what
+	 * @param string $action_desc
+	 * @param array  $query_args
+	 * @param bool   $override_overwrite
+	 * @throws EE_Error
+	 * @see   EE_Admin_Page::_redirect_after_action() for params.
+	 * @since 4.5.0
+	 */
+	public function redirect_after_action(
+		$success = false,
+		$what = 'item',
+		$action_desc = 'processed',
+		$query_args = [],
+		$override_overwrite = false
+	) {
+		$this->_redirect_after_action(
+			$success,
+			$what,
+			$action_desc,
+			$query_args,
+			$override_overwrite
+		);
+	}
+
+
+	/**
+	 * Helper method for merging existing request data with the returned redirect url.
+	 *
+	 * This is typically used for redirects after an action so that if the original view was a filtered view those
+	 * filters are still applied.
+	 *
+	 * @param array $new_route_data
+	 * @return array
+	 */
+	protected function mergeExistingRequestParamsWithRedirectArgs(array $new_route_data)
+	{
+		foreach ($this->request->requestParams() as $ref => $value) {
+			// unset nonces
+			if (strpos($ref, 'nonce') !== false) {
+				$this->request->unSetRequestParam($ref);
+				continue;
+			}
+			// urlencode values.
+			$value = is_array($value) ? array_map('urlencode', $value) : urlencode($value);
+			$this->request->setRequestParam($ref, $value);
+		}
+		return array_merge($this->request->requestParams(), $new_route_data);
+	}
+
+
+	/**
+	 * @param int|float|string $success            - whether success was for two or more records, or just one, or none
+	 * @param string           $what               - what the action was performed on
+	 * @param string           $action_desc        - what was done ie: updated, deleted, etc
+	 * @param array            $query_args         - an array of query_args to be added to the URL to redirect to
+	 * @param BOOL             $override_overwrite - by default all EE_Error::success messages are overwritten,
+	 *                                             this allows you to override this so that they show.
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	protected function _redirect_after_action(
+		$success = 0,
+		string $what = 'item',
+		string $action_desc = 'processed',
+		array $query_args = [],
+		bool $override_overwrite = false
+	) {
+		do_action('AHEE_log', __FILE__, __FUNCTION__, '');
+		$notices = EE_Error::get_notices(false);
+		// overwrite default success messages //BUT ONLY if overwrite not overridden
+		if (! $override_overwrite || ! empty($notices['errors'])) {
+			EE_Error::overwrite_success();
+		}
+		if (! $override_overwrite && ! empty($what) && ! empty($action_desc) && empty($notices['errors'])) {
+			// how many records affected ? more than one record ? or just one ?
+			EE_Error::add_success(
+				sprintf(
+					esc_html(
+						_n(
+							'The "%1$s" has been successfully %2$s.',
+							'The "%1$s" have been successfully %2$s.',
+							$success,
+							'event_espresso'
+						)
+					),
+					$what,
+					$action_desc
+				),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+		}
+		// check that $query_args isn't something crazy
+		if (! is_array($query_args)) {
+			$query_args = [];
+		}
+		/**
+		 * Allow injecting actions before the query_args are modified for possible different
+		 * redirections on save and close actions
+		 *
+		 * @param array $query_args       The original query_args array coming into the
+		 *                                method.
+		 * @since 4.2.0
+		 */
+		do_action(
+			"AHEE__{$this->class_name}___redirect_after_action__before_redirect_modification_{$this->_req_action}",
+			$query_args
+		);
+		// set redirect url.
+		// Note if there is a "page" index in the $query_args then we go with vanilla admin.php route,
+		// otherwise we go with whatever is set as the _admin_base_url
+		$redirect_url = isset($query_args['page']) ? admin_url('admin.php') : $this->_admin_base_url;
+		// calculate where we're going (if we have a "save and close" button pushed)
+		if (
+			$this->request->requestParamIsSet('save_and_close')
+			&& $this->request->requestParamIsSet('save_and_close_referrer')
+		) {
+			// even though we have the save_and_close referrer, we need to parse the url for the action in order to generate a nonce
+			$parsed_url = parse_url($this->request->getRequestParam('save_and_close_referrer', '', 'url'));
+			// regenerate query args array from referrer URL
+			parse_str($parsed_url['query'], $query_args);
+			// correct page and action will be in the query args now
+			$redirect_url = admin_url('admin.php');
+		}
+		// merge any default query_args set in _default_route_query_args property
+		if (! empty($this->_default_route_query_args) && ! $this->_is_UI_request) {
+			$args_to_merge = [];
+			foreach ($this->_default_route_query_args as $query_param => $query_value) {
+				// is there a wp_referer array in our _default_route_query_args property?
+				if ($query_param === 'wp_referer') {
+					$query_value = (array) $query_value;
+					foreach ($query_value as $reference => $value) {
+						if (strpos($reference, 'nonce') !== false) {
+							continue;
+						}
+						// finally we will override any arguments in the referer with
+						// what might be set on the _default_route_query_args array.
+						if (isset($this->_default_route_query_args[ $reference ])) {
+							$args_to_merge[ $reference ] = urlencode($this->_default_route_query_args[ $reference ]);
+						} else {
+							$args_to_merge[ $reference ] = urlencode($value);
+						}
+					}
+					continue;
+				}
+				$args_to_merge[ $query_param ] = $query_value;
+			}
+			// now let's merge these arguments but override with what was specifically sent in to the
+			// redirect.
+			$query_args = array_merge($args_to_merge, $query_args);
+		}
+		$this->_process_notices($query_args);
+		// generate redirect url
+		// if redirecting to anything other than the main page, add a nonce
+		if (isset($query_args['action'])) {
+			// manually generate wp_nonce and merge that with the query vars
+			// becuz the wp_nonce_url function wrecks havoc on some vars
+			$query_args['_wpnonce'] = wp_create_nonce($query_args['action'] . '_nonce');
+		}
+		// we're adding some hooks and filters in here for processing any things just before redirects
+		// (example: an admin page has done an insert or update and we want to run something after that).
+		do_action('AHEE_redirect_' . $this->class_name . $this->_req_action, $query_args);
+		$redirect_url = apply_filters(
+			'FHEE_redirect_' . $this->class_name . $this->_req_action,
+			EE_Admin_Page::add_query_args_and_nonce($query_args, $redirect_url),
+			$query_args
+		);
+		// check if we're doing ajax.  If we are then lets just return the results and js can handle how it wants.
+		if ($this->request->isAjax()) {
+			$default_data                    = [
+				'close'        => true,
+				'redirect_url' => $redirect_url,
+				'where'        => 'main',
+				'what'         => 'append',
+			];
+			$this->_template_args['success'] = $success;
+			$this->_template_args['data']    = ! empty($this->_template_args['data']) ? array_merge(
+				$default_data,
+				$this->_template_args['data']
+			) : $default_data;
+			$this->_return_json();
+		}
+		wp_safe_redirect($redirect_url);
+		exit();
+	}
+
+
+	/**
+	 * process any notices before redirecting (or returning ajax request)
+	 * This method sets the $this->_template_args['notices'] attribute;
+	 *
+	 * @param array $query_args         any query args that need to be used for notice transient ('action')
+	 * @param bool  $skip_route_verify  This is typically used when we are processing notices REALLY early and
+	 *                                  page_routes haven't been defined yet.
+	 * @param bool  $sticky_notices     This is used to flag that regardless of whether this is doing_ajax or not, we
+	 *                                  still save a transient for the notice.
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	protected function _process_notices($query_args = [], $skip_route_verify = false, $sticky_notices = true)
+	{
+		// first let's set individual error properties if doing_ajax and the properties aren't already set.
+		if ($this->request->isAjax()) {
+			$notices = EE_Error::get_notices(false);
+			if (empty($this->_template_args['success'])) {
+				$this->_template_args['success'] = isset($notices['success']) ? $notices['success'] : false;
+			}
+			if (empty($this->_template_args['errors'])) {
+				$this->_template_args['errors'] = isset($notices['errors']) ? $notices['errors'] : false;
+			}
+			if (empty($this->_template_args['attention'])) {
+				$this->_template_args['attention'] = isset($notices['attention']) ? $notices['attention'] : false;
+			}
+		}
+		$this->_template_args['notices'] = EE_Error::get_notices();
+		// IF this isn't ajax we need to create a transient for the notices using the route (however, overridden if $sticky_notices == true)
+		if (! $this->request->isAjax() || $sticky_notices) {
+			$route = isset($query_args['action']) ? $query_args['action'] : 'default';
+			$this->_add_transient(
+				$route,
+				$this->_template_args['notices'],
+				true,
+				$skip_route_verify
+			);
+		}
+	}
+
+
+	/**
+	 * get_action_link_or_button
+	 * returns the button html for adding, editing, or deleting an item (depending on given type)
+	 *
+	 * @param string $action        use this to indicate which action the url is generated with.
+	 * @param string $type          accepted strings must be defined in the $_labels['button'] array(as the key)
+	 *                              property.
+	 * @param array  $extra_request if the button requires extra params you can include them in $key=>$value pairs.
+	 * @param string $class         Use this to give the class for the button. Defaults to 'button--primary'
+	 * @param string $base_url      If this is not provided
+	 *                              the _admin_base_url will be used as the default for the button base_url.
+	 *                              Otherwise this value will be used.
+	 * @param bool   $exclude_nonce If true then no nonce will be in the generated button link.
+	 * @return string
+	 * @throws InvalidArgumentException
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidDataTypeException
+	 * @throws EE_Error
+	 */
+	public function get_action_link_or_button(
+		$action,
+		$type = 'add',
+		$extra_request = [],
+		$class = 'button button--primary',
+		$base_url = '',
+		$exclude_nonce = false
+	) {
+		// first let's validate the action (if $base_url is FALSE otherwise validation will happen further along)
+		if (empty($base_url) && ! isset($this->_page_routes[ $action ])) {
+			throw new EE_Error(
+				sprintf(
+					esc_html__(
+						'There is no page route for given action for the button.  This action was given: %s',
+						'event_espresso'
+					),
+					$action
+				)
+			);
+		}
+		if (! isset($this->_labels['buttons'][ $type ])) {
+			throw new EE_Error(
+				sprintf(
+					esc_html__(
+						'There is no label for the given button type (%s). Labels are set in the <code>_page_config</code> property.',
+						'event_espresso'
+					),
+					$type
+				)
+			);
+		}
+		// finally check user access for this button.
+		$has_access = $this->check_user_access($action, true);
+		if (! $has_access) {
+			return '';
+		}
+		$_base_url  = ! $base_url ? $this->_admin_base_url : $base_url;
+		$query_args = [
+			'action' => $action,
+		];
+		// merge extra_request args but make sure our original action takes precedence and doesn't get overwritten.
+		if (! empty($extra_request)) {
+			$query_args = array_merge($extra_request, $query_args);
+		}
+		$url = EE_Admin_Page::add_query_args_and_nonce($query_args, $_base_url, false, $exclude_nonce);
+		return EEH_Template::get_button_or_link($url, $this->_labels['buttons'][ $type ], $class);
+	}
+
+
+	/**
+	 * _per_page_screen_option
+	 * Utility function for adding in a per_page_option in the screen_options_dropdown.
+	 *
+	 * @return void
+	 * @throws InvalidArgumentException
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidDataTypeException
+	 */
+	protected function _per_page_screen_option()
+	{
+		$option = 'per_page';
+		$args   = [
+			'label'   => apply_filters(
+				'FHEE__EE_Admin_Page___per_page_screen_options___label',
+				$this->_admin_page_title,
+				$this
+			),
+			'default' => (int) apply_filters(
+				'FHEE__EE_Admin_Page___per_page_screen_options__default',
+				20
+			),
+			'option'  => $this->_current_page . '_' . $this->_current_view . '_per_page',
+		];
+		// ONLY add the screen option if the user has access to it.
+		if ($this->check_user_access($this->_current_view, true)) {
+			add_screen_option($option, $args);
+		}
+	}
+
+
+	/**
+	 * set_per_page_screen_option
+	 * All this does is make sure that WordPress saves any per_page screen options (if set) for the current page.
+	 * we have to do this rather than running inside the 'set-screen-options' hook because it runs earlier than
+	 * admin_menu.
+	 *
+	 * @return void
+	 */
+	private function _set_per_page_screen_options()
+	{
+		if ($this->request->requestParamIsSet('wp_screen_options')) {
+			check_admin_referer('screen-options-nonce', 'screenoptionnonce');
+			if (! $user = wp_get_current_user()) {
+				return;
+			}
+			$option = $this->request->getRequestParam('wp_screen_options[option]', '', 'key');
+			if (! $option) {
+				return;
+			}
+			$value      = $this->request->getRequestParam('wp_screen_options[value]', 0, 'int');
+			$map_option = $option;
+			$option     = str_replace('-', '_', $option);
+			switch ($map_option) {
+				case $this->_current_page . '_' . $this->_current_view . '_per_page':
+					$max_value = apply_filters(
+						'FHEE__EE_Admin_Page___set_per_page_screen_options__max_value',
+						999,
+						$this->_current_page,
+						$this->_current_view
+					);
+					if ($value < 1) {
+						return;
+					}
+					$value = min($value, $max_value);
+					break;
+				default:
+					$value = apply_filters(
+						'FHEE__EE_Admin_Page___set_per_page_screen_options__value',
+						false,
+						$option,
+						$value
+					);
+					if (false === $value) {
+						return;
+					}
+					break;
+			}
+			update_user_meta($user->ID, $option, $value);
+			wp_safe_redirect(remove_query_arg(['pagenum', 'apage', 'paged'], wp_get_referer()));
+			exit;
+		}
+	}
+
+
+	/**
+	 * This just allows for setting the $_template_args property if it needs to be set outside the object
+	 *
+	 * @param array $data array that will be assigned to template args.
+	 */
+	public function set_template_args($data)
+	{
+		$this->_template_args = array_merge($this->_template_args, (array) $data);
+	}
+
+
+	/**
+	 * This makes available the WP transient system for temporarily moving data between routes
+	 *
+	 * @param string $route             the route that should receive the transient
+	 * @param array  $data              the data that gets sent
+	 * @param bool   $notices           If this is for notices then we use this to indicate so, otherwise its just a
+	 *                                  normal route transient.
+	 * @param bool   $skip_route_verify Used to indicate we want to skip route verification.  This is usually ONLY used
+	 *                                  when we are adding a transient before page_routes have been defined.
+	 * @return void
+	 * @throws EE_Error
+	 */
+	protected function _add_transient($route, $data, $notices = false, $skip_route_verify = false)
+	{
+		$user_id = get_current_user_id();
+		if (! $skip_route_verify) {
+			$this->_verify_route($route);
+		}
+		// now let's set the string for what kind of transient we're setting
+		$transient = $notices
+			? 'ee_rte_n_tx_' . $route . '_' . $user_id
+			: 'rte_tx_' . $route . '_' . $user_id;
+		$data      = $notices ? ['notices' => $data] : $data;
+		// is there already a transient for this route?  If there is then let's ADD to that transient
+		$existing = is_multisite() && is_network_admin()
+			? get_site_transient($transient)
+			: get_transient($transient);
+		if ($existing) {
+			$data = array_merge((array) $data, (array) $existing);
+		}
+		if (is_multisite() && is_network_admin()) {
+			set_site_transient($transient, $data, 8);
+		} else {
+			set_transient($transient, $data, 8);
+		}
+	}
+
+
+	/**
+	 * this retrieves the temporary transient that has been set for moving data between routes.
+	 *
+	 * @param bool   $notices true we get notices transient. False we just return normal route transient
+	 * @param string $route
+	 * @return mixed data
+	 */
+	protected function _get_transient($notices = false, $route = '')
+	{
+		$user_id   = get_current_user_id();
+		$route     = ! $route ? $this->_req_action : $route;
+		$transient = $notices
+			? 'ee_rte_n_tx_' . $route . '_' . $user_id
+			: 'rte_tx_' . $route . '_' . $user_id;
+		$data      = is_multisite() && is_network_admin()
+			? get_site_transient($transient)
+			: get_transient($transient);
+		// delete transient after retrieval (just in case it hasn't expired);
+		if (is_multisite() && is_network_admin()) {
+			delete_site_transient($transient);
+		} else {
+			delete_transient($transient);
+		}
+		return $notices && isset($data['notices']) ? $data['notices'] : $data;
+	}
+
+
+	/**
+	 * The purpose of this method is just to run garbage collection on any EE transients that might have expired but
+	 * would not be called later. This will be assigned to run on a specific EE Admin page. (place the method in the
+	 * default route callback on the EE_Admin page you want it run.)
+	 *
+	 * @return void
+	 */
+	protected function _transient_garbage_collection()
+	{
+		global $wpdb;
+		// retrieve all existing transients
+		$query =
+			"SELECT option_name FROM {$wpdb->options} WHERE option_name LIKE '%rte_tx_%' OR option_name LIKE '%rte_n_tx_%'";
+		if ($results = $wpdb->get_results($query)) {
+			foreach ($results as $result) {
+				$transient = str_replace('_transient_', '', $result->option_name);
+				get_transient($transient);
+				if (is_multisite() && is_network_admin()) {
+					get_site_transient($transient);
+				}
+			}
+		}
+	}
+
+
+	/**
+	 * get_view
+	 *
+	 * @return string content of _view property
+	 */
+	public function get_view()
+	{
+		return $this->_view;
+	}
+
+
+	/**
+	 * getter for the protected $_views property
+	 *
+	 * @return array
+	 */
+	public function get_views()
+	{
+		return $this->_views;
+	}
+
+
+	/**
+	 * get_current_page
+	 *
+	 * @return string _current_page property value
+	 */
+	public function get_current_page()
+	{
+		return $this->_current_page;
+	}
+
+
+	/**
+	 * get_current_view
+	 *
+	 * @return string _current_view property value
+	 */
+	public function get_current_view()
+	{
+		return $this->_current_view;
+	}
+
+
+	/**
+	 * get_current_screen
+	 *
+	 * @return object The current WP_Screen object
+	 */
+	public function get_current_screen()
+	{
+		return $this->_current_screen;
+	}
+
+
+	/**
+	 * get_current_page_view_url
+	 *
+	 * @return string This returns the url for the current_page_view.
+	 */
+	public function get_current_page_view_url()
+	{
+		return $this->_current_page_view_url;
+	}
+
+
+	/**
+	 * just returns the Request
+	 *
+	 * @return RequestInterface
+	 */
+	public function get_request()
+	{
+		return $this->request;
+	}
+
+
+	/**
+	 * just returns the _req_data property
+	 *
+	 * @return array
+	 */
+	public function get_request_data()
+	{
+		return $this->request->requestParams();
+	}
+
+
+	/**
+	 * returns the _req_data protected property
+	 *
+	 * @return string
+	 */
+	public function get_req_action()
+	{
+		return $this->_req_action;
+	}
+
+
+	/**
+	 * @return bool  value of $_is_caf property
+	 */
+	public function is_caf()
+	{
+		return $this->_is_caf;
+	}
+
+
+	/**
+	 * @return mixed
+	 */
+	public function default_espresso_metaboxes()
+	{
+		return $this->_default_espresso_metaboxes;
+	}
+
+
+	/**
+	 * @return mixed
+	 */
+	public function admin_base_url()
+	{
+		return $this->_admin_base_url;
+	}
+
+
+	/**
+	 * @return mixed
+	 */
+	public function wp_page_slug()
+	{
+		return $this->_wp_page_slug;
+	}
+
+
+	/**
+	 * updates  espresso configuration settings
+	 *
+	 * @param string                   $tab
+	 * @param EE_Config_Base|EE_Config $config
+	 * @param string                   $file file where error occurred
+	 * @param string                   $func function  where error occurred
+	 * @param string                   $line line no where error occurred
+	 * @return boolean
+	 */
+	protected function _update_espresso_configuration($tab, $config, $file = '', $func = '', $line = '')
+	{
+		// remove any options that are NOT going to be saved with the config settings.
+		if (isset($config->core->ee_ueip_optin)) {
+			// TODO: remove the following two lines and make sure values are migrated from 3.1
+			update_option('ee_ueip_optin', $config->core->ee_ueip_optin);
+			update_option('ee_ueip_has_notified', true);
+		}
+		// and save it (note we're also doing the network save here)
+		$net_saved    = ! is_main_site() || EE_Network_Config::instance()->update_config(false, false);
+		$config_saved = EE_Config::instance()->update_espresso_config(false, false);
+		if ($config_saved && $net_saved) {
+			EE_Error::add_success(sprintf(esc_html__('"%s" have been successfully updated.', 'event_espresso'), $tab));
+			return true;
+		}
+		EE_Error::add_error(
+			sprintf(esc_html__('The "%s" were not updated.', 'event_espresso'), $tab),
+			$file,
+			$func,
+			$line
+		);
+		return false;
+	}
+
+
+	/**
+	 * Returns an array to be used for EE_FOrm_Fields.helper.php's select_input as the $values argument.
+	 *
+	 * @return array
+	 */
+	public function get_yes_no_values()
+	{
+		return $this->_yes_no_values;
+	}
+
+
+	/**
+	 * @return string
+	 * @throws ReflectionException
+	 * @since 5.0.0.p
+	 */
+	protected function _get_dir()
+	{
+		$reflector = new ReflectionClass($this->class_name);
+		return dirname($reflector->getFileName());
+	}
+
+
+	/**
+	 * A helper for getting a "next link".
+	 *
+	 * @param string $url   The url to link to
+	 * @param string $class The class to use.
+	 * @return string
+	 */
+	protected function _next_link($url, $class = 'dashicons dashicons-arrow-right')
+	{
+		return '<a class="' . $class . '" href="' . $url . '"></a>';
+	}
+
+
+	/**
+	 * A helper for getting a "previous link".
+	 *
+	 * @param string $url   The url to link to
+	 * @param string $class The class to use.
+	 * @return string
+	 */
+	protected function _previous_link($url, $class = 'dashicons dashicons-arrow-left')
+	{
+		return '<a class="' . $class . '" href="' . $url . '"></a>';
+	}
+
+
+
+
+
+
+
+	// below are some messages related methods that should be available across the EE_Admin system.  Note, these methods are NOT page specific
+
+
+	/**
+	 * This processes an request to resend a registration and assumes we have a _REG_ID for doing so. So if the caller
+	 * knows that the _REG_ID isn't in the req_data array but CAN obtain it, the caller should ADD the _REG_ID to the
+	 * _req_data array.
+	 *
+	 * @return bool success/fail
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	protected function _process_resend_registration()
+	{
+		$this->_template_args['success'] = EED_Messages::process_resend($this->_req_data);
+		do_action(
+			'AHEE__EE_Admin_Page___process_resend_registration',
+			$this->_template_args['success'],
+			$this->request->requestParams()
+		);
+		return $this->_template_args['success'];
+	}
+
+
+	/**
+	 * This automatically processes any payment message notifications when manual payment has been applied.
+	 *
+	 * @param EE_Payment $payment
+	 * @return bool success/fail
+	 */
+	protected function _process_payment_notification(EE_Payment $payment)
+	{
+		add_filter('FHEE__EE_Payment_Processor__process_registration_payments__display_notifications', '__return_true');
+		do_action('AHEE__EE_Admin_Page___process_admin_payment_notification', $payment);
+		$this->_template_args['success'] = apply_filters(
+			'FHEE__EE_Admin_Page___process_admin_payment_notification__success',
+			false,
+			$payment
+		);
+		return $this->_template_args['success'];
+	}
+
+
+	/**
+	 * @param EEM_Base      $entity_model
+	 * @param string        $entity_PK_name name of the primary key field used as a request param, ie: id, ID, etc
+	 * @param string        $action         one of the EE_Admin_List_Table::ACTION_* constants: delete, restore, trash
+	 * @param string        $delete_column  name of the field that denotes whether entity is trashed
+	 * @param callable|null $callback       called after entity is trashed, restored, or deleted
+	 * @return int|float
+	 * @throws EE_Error
+	 */
+	protected function trashRestoreDeleteEntities(
+		EEM_Base $entity_model,
+		$entity_PK_name,
+		$action = EE_Admin_List_Table::ACTION_DELETE,
+		$delete_column = '',
+		callable $callback = null
+	) {
+		$entity_PK      = $entity_model->get_primary_key_field();
+		$entity_PK_name = $entity_PK_name ?: $entity_PK->get_name();
+		$entity_PK_type = $this->resolveEntityFieldDataType($entity_PK);
+		// grab ID if deleting a single entity
+		if ($this->request->requestParamIsSet($entity_PK_name)) {
+			$ID = $this->request->getRequestParam($entity_PK_name, 0, $entity_PK_type);
+			return $this->trashRestoreDeleteEntity($entity_model, $ID, $action, $delete_column, $callback) ? 1 : 0;
+		}
+		// or grab checkbox array if bulk deleting
+		$checkboxes = $this->request->getRequestParam('checkbox', [], $entity_PK_type, true);
+		if (empty($checkboxes)) {
+			return 0;
+		}
+		$success = 0;
+		$IDs     = array_keys($checkboxes);
+		// cycle thru bulk action checkboxes
+		foreach ($IDs as $ID) {
+			// increment $success
+			if ($this->trashRestoreDeleteEntity($entity_model, $ID, $action, $delete_column, $callback)) {
+				$success++;
+			}
+		}
+		$count = (int) count($checkboxes);
+		// if multiple entities were deleted successfully, then $deleted will be full count of deletions,
+		// otherwise it will be a fraction of ( actual deletions / total entities to be deleted )
+		return $success === $count ? $count : $success / $count;
+	}
+
+
+	/**
+	 * @param EE_Primary_Key_Field_Base $entity_PK
+	 * @return string
+	 * @throws EE_Error
+	 * @since   4.10.30.p
+	 */
+	private function resolveEntityFieldDataType(EE_Primary_Key_Field_Base $entity_PK)
+	{
+		$entity_PK_type = $entity_PK->getSchemaType();
+		switch ($entity_PK_type) {
+			case 'boolean':
+				return 'bool';
+			case 'integer':
+				return 'int';
+			case 'number':
+				return 'float';
+			case 'string':
+				return 'string';
+		}
+		throw new RuntimeException(
+			sprintf(
+				esc_html__(
+					'"%1$s" is an invalid schema type for the %2$s primary key.',
+					'event_espresso'
+				),
+				$entity_PK_type,
+				$entity_PK->get_name()
+			)
+		);
+	}
+
+
+	/**
+	 * @param EEM_Base      $entity_model
+	 * @param int|string    $entity_ID
+	 * @param string        $action        one of the EE_Admin_List_Table::ACTION_* constants: delete, restore, trash
+	 * @param string        $delete_column name of the field that denotes whether entity is trashed
+	 * @param callable|null $callback      called after entity is trashed, restored, or deleted
+	 * @return bool
+	 */
+	protected function trashRestoreDeleteEntity(
+		EEM_Base $entity_model,
+		$entity_ID,
+		string $action,
+		string $delete_column,
+		?callable $callback = null
+	): bool {
+		$entity_ID = absint($entity_ID);
+		if (! $entity_ID) {
+			$this->trashRestoreDeleteError($action, $entity_model);
+		}
+		$result = 0;
+		try {
+			$entity = $entity_model->get_one_by_ID($entity_ID);
+			if (! $entity instanceof EE_Base_Class) {
+				throw new DomainException(
+					sprintf(
+						esc_html__(
+							'Missing or invalid %1$s entity with ID of "%2$s" returned from db.',
+							'event_espresso'
+						),
+						str_replace('EEM_', '', $entity_model->get_this_model_name()),
+						$entity_ID
+					)
+				);
+			}
+			switch ($action) {
+				case EE_Admin_List_Table::ACTION_DELETE:
+					$result = (bool) $entity->delete_permanently();
+					break;
+				case EE_Admin_List_Table::ACTION_RESTORE:
+					$result = $entity->delete_or_restore(false);
+					break;
+				case EE_Admin_List_Table::ACTION_TRASH:
+					$result = $entity->delete_or_restore();
+					break;
+			}
+		} catch (Exception $exception) {
+			$this->trashRestoreDeleteError($action, $entity_model, $exception);
+		}
+		if (is_callable($callback)) {
+			call_user_func_array($callback, [$entity_model, $entity_ID, $action, $result, $delete_column]);
+		}
+		return $result;
+	}
+
+
+	/**
+	 * @param EEM_Base $entity_model
+	 * @param string   $delete_column
+	 * @since 4.10.30.p
+	 */
+	private function validateDeleteColumn(EEM_Base $entity_model, $delete_column)
+	{
+		if (empty($delete_column)) {
+			throw new DomainException(
+				sprintf(
+					esc_html__(
+						'You need to specify the name of the "delete column" on the %2$s model, in order to trash or restore an entity.',
+						'event_espresso'
+					),
+					$entity_model->get_this_model_name()
+				)
+			);
+		}
+		if (! $entity_model->has_field($delete_column)) {
+			throw new DomainException(
+				sprintf(
+					esc_html__(
+						'The %1$s field does not exist on the %2$s model.',
+						'event_espresso'
+					),
+					$delete_column,
+					$entity_model->get_this_model_name()
+				)
+			);
+		}
+	}
+
+
+	/**
+	 * @param EEM_Base       $entity_model
+	 * @param Exception|null $exception
+	 * @param string         $action
+	 * @since 4.10.30.p
+	 */
+	private function trashRestoreDeleteError($action, EEM_Base $entity_model, Exception $exception = null)
+	{
+		if ($exception instanceof Exception) {
+			throw new RuntimeException(
+				sprintf(
+					esc_html__(
+						'Could not %1$s the %2$s because the following error occurred: %3$s',
+						'event_espresso'
+					),
+					$action,
+					$entity_model->get_this_model_name(),
+					$exception->getMessage()
+				)
+			);
+		}
+		throw new RuntimeException(
+			sprintf(
+				esc_html__(
+					'Could not %1$s the %2$s because an invalid ID was received.',
+					'event_espresso'
+				),
+				$action,
+				$entity_model->get_this_model_name()
+			)
+		);
+	}
 }

core/libraries/batch/BatchRequestProcessor.php

Indentation +303 added lines, -303 removed lines

@@ -31,307 +31,307 @@
  */
 class BatchRequestProcessor
 {
-    /**
-     * Current job's ID (if assigned)
-     *
-     * @var string|null
-     */
-    protected $_job_id = '';
-
-    /**
-     * Current job's parameters
-     *
-     * @var JobParameters|null
-     */
-    protected $_job_parameters = null;
-
-    /**
-     * @var LoaderInterface|null
-     */
-    private $loader;
-
-
-    /**
-     * @var RequestInterface|null
-     */
-    private $request;
-
-
-    /**
-     * BatchRequestProcessor constructor.
-     *
-     * @param LoaderInterface  $loader
-     * @param RequestInterface $request
-     */
-    public function __construct(LoaderInterface $loader, RequestInterface $request)
-    {
-        $this->loader  = $loader;
-        $this->request = $request;
-    }
-
-
-    /**
-     * @param string $job_id
-     * @param string $job_handler_class
-     * @param array  $request_data
-     * @return JobHandlerInterface
-     * @throws BatchRequestException
-     * @since   5.0.0.p
-     */
-    private function initializeJobHandler(
-        string $job_id,
-        string $job_handler_class = '',
-        array $request_data = []
-    ): JobHandlerInterface {
-        $this->_job_id         = $job_id;
-        $this->_job_parameters = ! empty($job_handler_class)
-            ? new JobParameters($this->_job_id, $job_handler_class, $request_data)
-            : JobParameters::load($this->_job_id);
-        $this->_job_parameters->save();
-        return $this->instantiateBatchJobHandlerFromJobParameters($this->_job_parameters);
-    }
-
-
-    /**
-     * Creates a job for the specified batch handler class (which should be autoloaded)
-     * and the specified request data
-     *
-     * @return JobStepResponse
-     */
-    public function createJob(): JobStepResponse
-    {
-        try {
-            $request_data = $this->request->requestParams();
-            $job_id       = $this->request->getRequestParam(
-                'job_code',
-                wp_generate_password(15, false)
-            );
-            $service      = $this->request->getRequestParam('job_handler', '', 'fqcn');
-            $assessment   = $this->request->getRequestParam('job_assessment', '', 'fqcn');
-            $job_class    = $assessment !== '' ? $assessment : $service;
-            // replace escaped escaped backslashes with escaped unescaped backslashes :lol:
-            $job_class    = str_replace('\\\\', '\\', urldecode($job_class));
-            $job_handler  = $this->initializeJobHandler($job_id, $job_class, $request_data);
-            $job_response = $job_handler->createJob($this->_job_parameters);
-            $this->validateResponse('createJob', $this->_job_id, $job_response);
-            $success = $this->_job_parameters->save();
-            if (! $success) {
-                throw new BatchRequestException(
-                    sprintf(
-                        esc_html__(
-                            'Could not save job %1$s to the Wordpress Options table. These were the arguments used: %2$s',
-                            'event_espresso'
-                        ),
-                        $this->_job_id,
-                        wp_json_encode($request_data)
-                    )
-                );
-            }
-        } catch (Exception $e) {
-            $job_response = $this->_get_error_response($e, 'createJob');
-        }
-        return $job_response;
-    }
-
-
-    /**
-     * Retrieves the job's arguments
-     *
-     * @param string $job_id
-     * @param int    $batch_size
-     * @return JobStepResponse
-     */
-    public function continueJob(string $job_id, int $batch_size = 50): JobStepResponse
-    {
-        try {
-            $batch_size   = defined('EE_BATCHRUNNER_BATCH_SIZE')
-                ? EE_BATCHRUNNER_BATCH_SIZE
-                : $batch_size;
-            $job_handler  = $this->initializeJobHandler($job_id);
-            $job_response = $job_handler->continueJob($this->_job_parameters, $batch_size);
-            $this->validateResponse('continueJob', $this->_job_id, $job_response);
-            $this->_job_parameters->save();
-        } catch (Exception $e) {
-            $job_response = $this->_get_error_response($e, 'continueJob');
-        }
-        return $job_response;
-    }
-
-
-    /**
-     * Retrieves the job's arguments
-     *
-     * @param string $job_id
-     * @return JobStepResponse
-     */
-    public function advanceJob(string $job_id): JobStepResponse
-    {
-        try {
-            $job_handler  = $this->initializeJobHandler($job_id);
-            $job_response = $job_handler->advanceJob($this->_job_parameters);
-            $this->validateResponse('advanceJob', $this->_job_id, $job_response);
-            $this->_job_parameters->save();
-        } catch (Exception $e) {
-            $job_response = $this->_get_error_response($e, 'advanceJob');
-        }
-        return $job_response;
-    }
-
-
-    /**
-     * Forces a job to be cleaned up
-     *
-     * @param string $job_id
-     * @return JobStepResponse
-     */
-    public function cleanupJob(string $job_id): JobStepResponse
-    {
-        try {
-            $job_handler  = $this->initializeJobHandler($job_id);
-            $job_response = $job_handler->cleanupJob($this->_job_parameters);
-            $this->validateResponse('cleanupJob', $this->_job_id, $job_response);
-            $this->_job_parameters->set_status(JobParameters::status_cleaned_up);
-            $this->_job_parameters->delete();
-        } catch (Exception $e) {
-            $job_response = $this->_get_error_response($e, 'cleanupJob');
-        }
-        return $job_response;
-    }
-
-
-    /**
-     * Instantiates an object of type $classname, which implements
-     * JobHandlerInterface
-     *
-     * @param JobParameters $job_parameters
-     * @return JobHandlerInterface
-     * @throws BatchRequestException
-     */
-    public function instantiateBatchJobHandlerFromJobParameters(JobParameters $job_parameters): JobHandlerInterface
-    {
-        $this->verifyJobHandlerClassExists($job_parameters);
-        $job_handler = $this->loader->getNew($job_parameters->classname());
-        $this->validateJobHandler($job_handler, $job_parameters);
-        $job_handler->setRequestData($job_parameters->request_data());
-        if ($job_handler instanceof DbServiceJobHandler) {
-            $job_handler->initialize($job_parameters);
-        }
-        return $job_handler;
-    }
-
-
-    /**
-     * Instantiates an object of type $classname, which implements
-     * JobHandlerInterface
-     *
-     * @param string $classname
-     * @param array  $request_data
-     * @return JobHandlerInterface
-     * @throws BatchRequestException
-     * @deprecatd 5.0.0.p
-     */
-    public function instantiate_batch_job_handler_from_classname(
-        string $classname,
-        array $request_data = []
-    ): JobHandlerInterface {
-        return $this->instantiateBatchJobHandlerFromJobParameters($this->_job_parameters);
-    }
-
-
-    /**
-     * Creates a valid JobStepResponse object from an exception and method name.
-     *
-     * @param Exception $exception
-     * @param string    $method_name
-     * @return JobStepResponse
-     */
-    protected function _get_error_response(Exception $exception, string $method_name): JobStepResponse
-    {
-        if (! $this->_job_parameters instanceof JobParameters) {
-            $this->_job_parameters = new JobParameters($this->_job_id, esc_html__('__Unknown__', 'event_espresso'), []);
-        }
-        $this->_job_parameters->set_status(JobParameters::status_error);
-
-        $error_message = sprintf(
-            esc_html__(
-                '%1$sWhile running %3$s the following %2$s occurred: %4$s %5$s',
-                'event_espresso'
-            ),
-            '<h4>',
-            get_class($exception),
-            '<code>' . 'BatchRunner::' . $method_name . '()</code>',
-            '</h4><p>' . $exception->getMessage() . '</p>',
-            '<pre>' . $exception->getTraceAsString() . '</pre>'
-        );
-        return new JobStepResponse(
-            $this->_job_parameters,
-            "<div class='ee-batch-runner__error ee-status-outline ee-status-outline--error'>$error_message</div>"
-        );
-    }
-
-
-    /**
-     * @param string $function
-     * @param string $job_id
-     * @param        $job_response
-     * @throws BatchRequestException
-     * @since   5.0.0.p
-     */
-    private function validateResponse(string $function, string $job_id, $job_response)
-    {
-        if (! $job_response instanceof JobStepResponse) {
-            throw new BatchRequestException(
-                sprintf(
-                    esc_html__(
-                        'The class implementing JobHandlerInterface did not return a JobStepResponse when %1$s was called for job %2$s. It needs to return one or throw an Exception',
-                        'event_espresso'
-                    ),
-                    $function,
-                    $job_id
-                )
-            );
-        }
-    }
-
-
-    /**
-     * @param JobParameters $job_parameters
-     * @throws BatchRequestException
-     * @since   5.0.0.p
-     */
-    private function verifyJobHandlerClassExists(JobParameters $job_parameters)
-    {
-        if (! class_exists($job_parameters->classname())) {
-            throw new BatchRequestException(
-                sprintf(
-                    esc_html__(
-                        'The class %1$s does not exist, and so could not be used for running a job. It should implement JobHandlerInterface.',
-                        'event_espresso'
-                    ),
-                    $job_parameters->classname()
-                )
-            );
-        }
-    }
-
-    /**
-     * @param JobHandlerInterface|NULL $job_handler
-     * @param JobParameters $job_parameters
-     * @throws BatchRequestException
-     * @since   5.0.0.p
-     */
-    private function validateJobHandler(?JobHandlerInterface $job_handler, JobParameters $job_parameters)
-    {
-        if (! $job_handler instanceof JobHandlerInterface) {
-            throw new BatchRequestException(
-                sprintf(
-                    esc_html__(
-                        'The class %1$s does not implement JobHandlerInterface and so could not be used for running a job',
-                        'event_espresso'
-                    ),
-                    $job_parameters->classname()
-                )
-            );
-        }
-    }
+	/**
+	 * Current job's ID (if assigned)
+	 *
+	 * @var string|null
+	 */
+	protected $_job_id = '';
+
+	/**
+	 * Current job's parameters
+	 *
+	 * @var JobParameters|null
+	 */
+	protected $_job_parameters = null;
+
+	/**
+	 * @var LoaderInterface|null
+	 */
+	private $loader;
+
+
+	/**
+	 * @var RequestInterface|null
+	 */
+	private $request;
+
+
+	/**
+	 * BatchRequestProcessor constructor.
+	 *
+	 * @param LoaderInterface  $loader
+	 * @param RequestInterface $request
+	 */
+	public function __construct(LoaderInterface $loader, RequestInterface $request)
+	{
+		$this->loader  = $loader;
+		$this->request = $request;
+	}
+
+
+	/**
+	 * @param string $job_id
+	 * @param string $job_handler_class
+	 * @param array  $request_data
+	 * @return JobHandlerInterface
+	 * @throws BatchRequestException
+	 * @since   5.0.0.p
+	 */
+	private function initializeJobHandler(
+		string $job_id,
+		string $job_handler_class = '',
+		array $request_data = []
+	): JobHandlerInterface {
+		$this->_job_id         = $job_id;
+		$this->_job_parameters = ! empty($job_handler_class)
+			? new JobParameters($this->_job_id, $job_handler_class, $request_data)
+			: JobParameters::load($this->_job_id);
+		$this->_job_parameters->save();
+		return $this->instantiateBatchJobHandlerFromJobParameters($this->_job_parameters);
+	}
+
+
+	/**
+	 * Creates a job for the specified batch handler class (which should be autoloaded)
+	 * and the specified request data
+	 *
+	 * @return JobStepResponse
+	 */
+	public function createJob(): JobStepResponse
+	{
+		try {
+			$request_data = $this->request->requestParams();
+			$job_id       = $this->request->getRequestParam(
+				'job_code',
+				wp_generate_password(15, false)
+			);
+			$service      = $this->request->getRequestParam('job_handler', '', 'fqcn');
+			$assessment   = $this->request->getRequestParam('job_assessment', '', 'fqcn');
+			$job_class    = $assessment !== '' ? $assessment : $service;
+			// replace escaped escaped backslashes with escaped unescaped backslashes :lol:
+			$job_class    = str_replace('\\\\', '\\', urldecode($job_class));
+			$job_handler  = $this->initializeJobHandler($job_id, $job_class, $request_data);
+			$job_response = $job_handler->createJob($this->_job_parameters);
+			$this->validateResponse('createJob', $this->_job_id, $job_response);
+			$success = $this->_job_parameters->save();
+			if (! $success) {
+				throw new BatchRequestException(
+					sprintf(
+						esc_html__(
+							'Could not save job %1$s to the Wordpress Options table. These were the arguments used: %2$s',
+							'event_espresso'
+						),
+						$this->_job_id,
+						wp_json_encode($request_data)
+					)
+				);
+			}
+		} catch (Exception $e) {
+			$job_response = $this->_get_error_response($e, 'createJob');
+		}
+		return $job_response;
+	}
+
+
+	/**
+	 * Retrieves the job's arguments
+	 *
+	 * @param string $job_id
+	 * @param int    $batch_size
+	 * @return JobStepResponse
+	 */
+	public function continueJob(string $job_id, int $batch_size = 50): JobStepResponse
+	{
+		try {
+			$batch_size   = defined('EE_BATCHRUNNER_BATCH_SIZE')
+				? EE_BATCHRUNNER_BATCH_SIZE
+				: $batch_size;
+			$job_handler  = $this->initializeJobHandler($job_id);
+			$job_response = $job_handler->continueJob($this->_job_parameters, $batch_size);
+			$this->validateResponse('continueJob', $this->_job_id, $job_response);
+			$this->_job_parameters->save();
+		} catch (Exception $e) {
+			$job_response = $this->_get_error_response($e, 'continueJob');
+		}
+		return $job_response;
+	}
+
+
+	/**
+	 * Retrieves the job's arguments
+	 *
+	 * @param string $job_id
+	 * @return JobStepResponse
+	 */
+	public function advanceJob(string $job_id): JobStepResponse
+	{
+		try {
+			$job_handler  = $this->initializeJobHandler($job_id);
+			$job_response = $job_handler->advanceJob($this->_job_parameters);
+			$this->validateResponse('advanceJob', $this->_job_id, $job_response);
+			$this->_job_parameters->save();
+		} catch (Exception $e) {
+			$job_response = $this->_get_error_response($e, 'advanceJob');
+		}
+		return $job_response;
+	}
+
+
+	/**
+	 * Forces a job to be cleaned up
+	 *
+	 * @param string $job_id
+	 * @return JobStepResponse
+	 */
+	public function cleanupJob(string $job_id): JobStepResponse
+	{
+		try {
+			$job_handler  = $this->initializeJobHandler($job_id);
+			$job_response = $job_handler->cleanupJob($this->_job_parameters);
+			$this->validateResponse('cleanupJob', $this->_job_id, $job_response);
+			$this->_job_parameters->set_status(JobParameters::status_cleaned_up);
+			$this->_job_parameters->delete();
+		} catch (Exception $e) {
+			$job_response = $this->_get_error_response($e, 'cleanupJob');
+		}
+		return $job_response;
+	}
+
+
+	/**
+	 * Instantiates an object of type $classname, which implements
+	 * JobHandlerInterface
+	 *
+	 * @param JobParameters $job_parameters
+	 * @return JobHandlerInterface
+	 * @throws BatchRequestException
+	 */
+	public function instantiateBatchJobHandlerFromJobParameters(JobParameters $job_parameters): JobHandlerInterface
+	{
+		$this->verifyJobHandlerClassExists($job_parameters);
+		$job_handler = $this->loader->getNew($job_parameters->classname());
+		$this->validateJobHandler($job_handler, $job_parameters);
+		$job_handler->setRequestData($job_parameters->request_data());
+		if ($job_handler instanceof DbServiceJobHandler) {
+			$job_handler->initialize($job_parameters);
+		}
+		return $job_handler;
+	}
+
+
+	/**
+	 * Instantiates an object of type $classname, which implements
+	 * JobHandlerInterface
+	 *
+	 * @param string $classname
+	 * @param array  $request_data
+	 * @return JobHandlerInterface
+	 * @throws BatchRequestException
+	 * @deprecatd 5.0.0.p
+	 */
+	public function instantiate_batch_job_handler_from_classname(
+		string $classname,
+		array $request_data = []
+	): JobHandlerInterface {
+		return $this->instantiateBatchJobHandlerFromJobParameters($this->_job_parameters);
+	}
+
+
+	/**
+	 * Creates a valid JobStepResponse object from an exception and method name.
+	 *
+	 * @param Exception $exception
+	 * @param string    $method_name
+	 * @return JobStepResponse
+	 */
+	protected function _get_error_response(Exception $exception, string $method_name): JobStepResponse
+	{
+		if (! $this->_job_parameters instanceof JobParameters) {
+			$this->_job_parameters = new JobParameters($this->_job_id, esc_html__('__Unknown__', 'event_espresso'), []);
+		}
+		$this->_job_parameters->set_status(JobParameters::status_error);
+
+		$error_message = sprintf(
+			esc_html__(
+				'%1$sWhile running %3$s the following %2$s occurred: %4$s %5$s',
+				'event_espresso'
+			),
+			'<h4>',
+			get_class($exception),
+			'<code>' . 'BatchRunner::' . $method_name . '()</code>',
+			'</h4><p>' . $exception->getMessage() . '</p>',
+			'<pre>' . $exception->getTraceAsString() . '</pre>'
+		);
+		return new JobStepResponse(
+			$this->_job_parameters,
+			"<div class='ee-batch-runner__error ee-status-outline ee-status-outline--error'>$error_message</div>"
+		);
+	}
+
+
+	/**
+	 * @param string $function
+	 * @param string $job_id
+	 * @param        $job_response
+	 * @throws BatchRequestException
+	 * @since   5.0.0.p
+	 */
+	private function validateResponse(string $function, string $job_id, $job_response)
+	{
+		if (! $job_response instanceof JobStepResponse) {
+			throw new BatchRequestException(
+				sprintf(
+					esc_html__(
+						'The class implementing JobHandlerInterface did not return a JobStepResponse when %1$s was called for job %2$s. It needs to return one or throw an Exception',
+						'event_espresso'
+					),
+					$function,
+					$job_id
+				)
+			);
+		}
+	}
+
+
+	/**
+	 * @param JobParameters $job_parameters
+	 * @throws BatchRequestException
+	 * @since   5.0.0.p
+	 */
+	private function verifyJobHandlerClassExists(JobParameters $job_parameters)
+	{
+		if (! class_exists($job_parameters->classname())) {
+			throw new BatchRequestException(
+				sprintf(
+					esc_html__(
+						'The class %1$s does not exist, and so could not be used for running a job. It should implement JobHandlerInterface.',
+						'event_espresso'
+					),
+					$job_parameters->classname()
+				)
+			);
+		}
+	}
+
+	/**
+	 * @param JobHandlerInterface|NULL $job_handler
+	 * @param JobParameters $job_parameters
+	 * @throws BatchRequestException
+	 * @since   5.0.0.p
+	 */
+	private function validateJobHandler(?JobHandlerInterface $job_handler, JobParameters $job_parameters)
+	{
+		if (! $job_handler instanceof JobHandlerInterface) {
+			throw new BatchRequestException(
+				sprintf(
+					esc_html__(
+						'The class %1$s does not implement JobHandlerInterface and so could not be used for running a job',
+						'event_espresso'
+					),
+					$job_parameters->classname()
+				)
+			);
+		}
+	}
 }

core/libraries/batch/JobHandlerBaseClasses/JobHandler.php

Indentation +238 added lines, -238 removed lines

@@ -17,271 +17,271 @@
  */
 abstract class JobHandler implements JobHandlerInterface
 {
-    /**
-     * @var array
-     */
-    protected $feedback = [];
-
-    /**
-     * incoming Request data
-     *
-     * @var array
-     */
-    protected $request_data = [];
-
-    /**
-     * Extra data to include as part of the response, literally gets set as JobStepResponse::$_extra_data
-     *
-     * @var array
-     */
-    protected $response_data = [];
-
-
-    /**
-     * utilized in newer batch job implementations, but forwarding to existing methods for now.
-     * Performs any necessary setup for starting the job. This is also a good
-     * place to setup the $job_arguments which will be used for subsequent HTTP requests
-     * when continue_job will be called
-     *
-     * @param JobParameters $job_parameters
-     * @return JobStepResponse
-     * @throws BatchRequestException
-     * @since 5.0.0.p
-     */
-    public function createJob(JobParameters $job_parameters): JobStepResponse
-    {
-        return $this->create_job($job_parameters);
-    }
-
-
-    /**
-     * utilized in newer batch job implementations, but forwarding to existing methods for now.
-     * Performs another step of the job
-     *
-     * @param JobParameters $job_parameters
-     * @param int           $batch_size
-     * @return JobStepResponse
-     * @throws BatchRequestException
-     * @since 5.0.0.p
-     */
-    public function continueJob(JobParameters $job_parameters, int $batch_size = 50): JobStepResponse
-    {
-        return $this->continue_job($job_parameters, $batch_size);
-    }
-
-
-    /**
-     * utilized in newer batch job implementations, but forwarding to existing methods for now.
-     * used to advance from one batch job to another
-     * primarily used for executing a job assessment phase where an accurate count of items to update can be made,
-     * followed by the actual update job.
-     *
-     * @param JobParameters $job_parameters
-     * @return JobStepResponse
-     * @since 5.0.0.p
-     */
-    public function advanceJob(JobParameters $job_parameters): JobStepResponse
-    {
-        return $this->advance_job($job_parameters);
-    }
-
-    // phpcs:disable PSR1.Methods.CamelCapsMethodName.NotCamelCaps
-    /**
-     * used to advance from one batch job to another
-     * primarily used for executing a job assessment phase where an accurate count of items to update can be made,
-     * followed by the actual update job.
-     * By default, this function won't do anything until overridden in a chile class.
-     *
-     * @param JobParameters $job_parameters
-     * @return JobStepResponse
-     * @since 5.0.0.p
-     */
-    public function advance_job(JobParameters $job_parameters): JobStepResponse
-    {
-        $job_parameters->set_status(JobParameters::status_continue);
-        return new JobStepResponse($job_parameters, $this->feedback);
-    }
-
-
-    /**
-     * utilized in newer batch job implementations, but forwarding to existing methods for now.
-     * Performs any clean-up logic when we know the job is completed
-     *
-     * @param JobParameters $job_parameters
-     * @return JobStepResponse
-     * @throws BatchRequestException
-     * @since 5.0.0.p
-     */
-    public function cleanupJob(JobParameters $job_parameters): JobStepResponse
-    {
-        return $this->cleanup_job($job_parameters);
-    }
-
-
-    /**
-     * @return array
-     */
-    public function requestData(): array
-    {
-        return $this->request_data;
-    }
-
-
-    /**
-     * @return mixed
-     */
-    public function getRequestData($key)
-    {
-        return $this->request_data[ $key ] ?? null;
-    }
-
-
-    /**
-     * @param array $request_data
-     */
-    public function setRequestData(array $request_data): void
-    {
-        $this->request_data = $request_data;
-    }
-
-
-    /**
-     * @return array
-     */
-    public function responseData(): array
-    {
-        return $this->response_data;
-    }
-
-
-    /**
-     * @param array $response_data
-     */
-    public function addResponseData(array $response_data): void
-    {
-        $this->response_data += $response_data;
-    }
-
-
-
-    /**
-     * @param array $response_data
-     */
-    public function setResponseData(array $response_data): void
-    {
-        $this->response_data = $response_data;
-    }
-
-
-
-
-    protected function displayJobStepResults(int $processed, string $custom_message = '')
-    {
-        $this->feedback[] = '
+	/**
+	 * @var array
+	 */
+	protected $feedback = [];
+
+	/**
+	 * incoming Request data
+	 *
+	 * @var array
+	 */
+	protected $request_data = [];
+
+	/**
+	 * Extra data to include as part of the response, literally gets set as JobStepResponse::$_extra_data
+	 *
+	 * @var array
+	 */
+	protected $response_data = [];
+
+
+	/**
+	 * utilized in newer batch job implementations, but forwarding to existing methods for now.
+	 * Performs any necessary setup for starting the job. This is also a good
+	 * place to setup the $job_arguments which will be used for subsequent HTTP requests
+	 * when continue_job will be called
+	 *
+	 * @param JobParameters $job_parameters
+	 * @return JobStepResponse
+	 * @throws BatchRequestException
+	 * @since 5.0.0.p
+	 */
+	public function createJob(JobParameters $job_parameters): JobStepResponse
+	{
+		return $this->create_job($job_parameters);
+	}
+
+
+	/**
+	 * utilized in newer batch job implementations, but forwarding to existing methods for now.
+	 * Performs another step of the job
+	 *
+	 * @param JobParameters $job_parameters
+	 * @param int           $batch_size
+	 * @return JobStepResponse
+	 * @throws BatchRequestException
+	 * @since 5.0.0.p
+	 */
+	public function continueJob(JobParameters $job_parameters, int $batch_size = 50): JobStepResponse
+	{
+		return $this->continue_job($job_parameters, $batch_size);
+	}
+
+
+	/**
+	 * utilized in newer batch job implementations, but forwarding to existing methods for now.
+	 * used to advance from one batch job to another
+	 * primarily used for executing a job assessment phase where an accurate count of items to update can be made,
+	 * followed by the actual update job.
+	 *
+	 * @param JobParameters $job_parameters
+	 * @return JobStepResponse
+	 * @since 5.0.0.p
+	 */
+	public function advanceJob(JobParameters $job_parameters): JobStepResponse
+	{
+		return $this->advance_job($job_parameters);
+	}
+
+	// phpcs:disable PSR1.Methods.CamelCapsMethodName.NotCamelCaps
+	/**
+	 * used to advance from one batch job to another
+	 * primarily used for executing a job assessment phase where an accurate count of items to update can be made,
+	 * followed by the actual update job.
+	 * By default, this function won't do anything until overridden in a chile class.
+	 *
+	 * @param JobParameters $job_parameters
+	 * @return JobStepResponse
+	 * @since 5.0.0.p
+	 */
+	public function advance_job(JobParameters $job_parameters): JobStepResponse
+	{
+		$job_parameters->set_status(JobParameters::status_continue);
+		return new JobStepResponse($job_parameters, $this->feedback);
+	}
+
+
+	/**
+	 * utilized in newer batch job implementations, but forwarding to existing methods for now.
+	 * Performs any clean-up logic when we know the job is completed
+	 *
+	 * @param JobParameters $job_parameters
+	 * @return JobStepResponse
+	 * @throws BatchRequestException
+	 * @since 5.0.0.p
+	 */
+	public function cleanupJob(JobParameters $job_parameters): JobStepResponse
+	{
+		return $this->cleanup_job($job_parameters);
+	}
+
+
+	/**
+	 * @return array
+	 */
+	public function requestData(): array
+	{
+		return $this->request_data;
+	}
+
+
+	/**
+	 * @return mixed
+	 */
+	public function getRequestData($key)
+	{
+		return $this->request_data[ $key ] ?? null;
+	}
+
+
+	/**
+	 * @param array $request_data
+	 */
+	public function setRequestData(array $request_data): void
+	{
+		$this->request_data = $request_data;
+	}
+
+
+	/**
+	 * @return array
+	 */
+	public function responseData(): array
+	{
+		return $this->response_data;
+	}
+
+
+	/**
+	 * @param array $response_data
+	 */
+	public function addResponseData(array $response_data): void
+	{
+		$this->response_data += $response_data;
+	}
+
+
+
+	/**
+	 * @param array $response_data
+	 */
+	public function setResponseData(array $response_data): void
+	{
+		$this->response_data = $response_data;
+	}
+
+
+
+
+	protected function displayJobStepResults(int $processed, string $custom_message = '')
+	{
+		$this->feedback[] = '
 			<div class="ee-batch-job-step-results">
 			' . $this->infoWrapper(
-            sprintf(
-                $custom_message !== ''
-                        ? $custom_message
-                        : esc_html__('processed this batch: %d', 'event_espresso'),
-                $processed
-            )
-        ) . '
+			sprintf(
+				$custom_message !== ''
+						? $custom_message
+						: esc_html__('processed this batch: %d', 'event_espresso'),
+				$processed
+			)
+		) . '
 			</div>';
-    }
+	}
 
 
-    protected function displayJobFinalResults(JobParameters $job_parameters, string $custom_message = '')
-    {
-        if ($job_parameters->status() === JobParameters::status_complete) {
-            $this->feedback[] = '
+	protected function displayJobFinalResults(JobParameters $job_parameters, string $custom_message = '')
+	{
+		if ($job_parameters->status() === JobParameters::status_complete) {
+			$this->feedback[] = '
 			<div class="ee-batch-job-final-results">
 				' . $this->okWrapper(
-                sprintf(
-                    $custom_message !== ''
-                            ? $custom_message
-                            : esc_html__('total units processed: %d', 'event_espresso'),
-                    $job_parameters->units_processed()
-                )
-            ) . '
+				sprintf(
+					$custom_message !== ''
+							? $custom_message
+							: esc_html__('total units processed: %d', 'event_espresso'),
+					$job_parameters->units_processed()
+				)
+			) . '
 				' . $this->jobStatusNotice($job_parameters) . '
 			</div>';
-        }
-    }
+		}
+	}
 
 
-    protected function jobStatusNotice(JobParameters $job_parameters): string
-    {
-        switch ($job_parameters->status()) {
-            case JobParameters::status_cleaned_up:
-            case JobParameters::status_continue:
-            case JobParameters::status_pause:
-                break;
-            case JobParameters::status_complete:
-                return $this->successWrapper('job status: COMPLETE');
-            case JobParameters::status_error:
-                return $this->errorWrapper('job status: ERROR');
-        }
-        return '';
-    }
+	protected function jobStatusNotice(JobParameters $job_parameters): string
+	{
+		switch ($job_parameters->status()) {
+			case JobParameters::status_cleaned_up:
+			case JobParameters::status_continue:
+			case JobParameters::status_pause:
+				break;
+			case JobParameters::status_complete:
+				return $this->successWrapper('job status: COMPLETE');
+			case JobParameters::status_error:
+				return $this->errorWrapper('job status: ERROR');
+		}
+		return '';
+	}
 
 
-    /**
-     * @param string $update_text
-     */
-    protected function updateText(string $update_text)
-    {
-        $this->feedback[] = "<p class='ee-batch-job-update'>$update_text</p>";
-    }
+	/**
+	 * @param string $update_text
+	 */
+	protected function updateText(string $update_text)
+	{
+		$this->feedback[] = "<p class='ee-batch-job-update'>$update_text</p>";
+	}
 
 
-    protected function updateTextHeader(string $update_text)
-    {
-        $this->feedback[] = "<h4 class='ee-batch-job-update-heading'>$update_text</h4>";
-    }
+	protected function updateTextHeader(string $update_text)
+	{
+		$this->feedback[] = "<h4 class='ee-batch-job-update-heading'>$update_text</h4>";
+	}
 
 
-    protected function attentionWrapper(string $update_text): string
-    {
-        return "<span class='ee-status-outline ee-status-bg--attention'>$update_text</span>";
-    }
+	protected function attentionWrapper(string $update_text): string
+	{
+		return "<span class='ee-status-outline ee-status-bg--attention'>$update_text</span>";
+	}
 
 
-    protected function errorWrapper(string $update_text): string
-    {
-        return "<span class='ee-status-outline ee-status-bg--error'>$update_text</span>";
-    }
+	protected function errorWrapper(string $update_text): string
+	{
+		return "<span class='ee-status-outline ee-status-bg--error'>$update_text</span>";
+	}
 
 
-    protected function infoWrapper(string $update_text): string
-    {
-        return "<span class='ee-status-outline ee-status-bg--info'>$update_text</span>";
-    }
+	protected function infoWrapper(string $update_text): string
+	{
+		return "<span class='ee-status-outline ee-status-bg--info'>$update_text</span>";
+	}
 
 
-    protected function okWrapper(string $update_text): string
-    {
-        return "<span class='ee-status-outline ee-status-bg--ok'>$update_text</span>";
-    }
+	protected function okWrapper(string $update_text): string
+	{
+		return "<span class='ee-status-outline ee-status-bg--ok'>$update_text</span>";
+	}
 
 
-    protected function successWrapper(string $update_text): string
-    {
-        return "<span class='ee-status-outline ee-status-bg--success'>$update_text</span>";
-    }
+	protected function successWrapper(string $update_text): string
+	{
+		return "<span class='ee-status-outline ee-status-bg--success'>$update_text</span>";
+	}
 
 
-    protected function warningWrapper(string $update_text): string
-    {
-        return "<span class='ee-status-outline ee-status-bg--warning'>$update_text</span>";
-    }
+	protected function warningWrapper(string $update_text): string
+	{
+		return "<span class='ee-status-outline ee-status-bg--warning'>$update_text</span>";
+	}
 
 
-    /**
-     * @return string
-     */
-    protected function spinner(): string
-    {
-        return '<span class="spinner"></span>';
-    }
+	/**
+	 * @return string
+	 */
+	protected function spinner(): string
+	{
+		return '<span class="spinner"></span>';
+	}
 }

core/libraries/plugin_api/EE_Register_Addon.lib.php

Indentation +1201 added lines, -1201 removed lines

@@ -24,1205 +24,1205 @@
  */
 class EE_Register_Addon implements EEI_Plugin_API
 {
-    /**
-     * possibly truncated version of the EE core version string
-     *
-     * @var string
-     */
-    protected static $_core_version = '';
-
-    /**
-     * Holds values for registered addons
-     *
-     * @var array
-     */
-    protected static $_settings = [];
-
-    /**
-     * @var  array $_incompatible_addons keys are addon SLUGS
-     * (first argument passed to EE_Register_Addon::register()), keys are
-     * their MINIMUM VERSION (with all 5 parts. Eg 1.2.3.rc.004).
-     * Generally this should be used sparingly, as we don't want to muddle up
-     * EE core with knowledge of ALL the addons out there.
-     * If you want NO versions of an addon to run with a certain version of core,
-     * it's usually best to define the addon's "min_core_version" as part of its call
-     * to EE_Register_Addon::register(), rather than using this array with a super high value for its
-     * minimum plugin version.
-     * @access    protected
-     */
-    protected static $_incompatible_addons = [
-        'Multi_Event_Registration' => '2.0.11.rc.002',
-        'Promotions'               => '1.0.0.rc.084',
-    ];
-
-    /**
-     * @var LoaderInterface
-     */
-    protected static $loader;
-
-
-    /**
-     * We should always be comparing core to a version like '4.3.0.rc.000',
-     * not just '4.3.0'.
-     * So if the addon developer doesn't provide that full version string,
-     * fill in the blanks for them
-     *
-     * @param string $min_core_version
-     * @return string always like '4.3.0.rc.000'
-     */
-    protected static function _effective_version(string $min_core_version): string
-    {
-        // versions: 4 . 3 . 1 . p . 123
-        // offsets:    0 . 1 . 2 . 3 . 4
-        $version_parts = explode('.', $min_core_version);
-        // check they specified the micro version (after 2nd period)
-        if (! isset($version_parts[2])) {
-            $version_parts[2] = '0';
-        }
-        // if they didn't specify the 'p', or 'rc' part. Just assume the lowest possible
-        // soon we can assume that's 'rc', but this current version is 'alpha'
-        if (! isset($version_parts[3])) {
-            $version_parts[3] = 'dev';
-        }
-        if (! isset($version_parts[4])) {
-            $version_parts[4] = '000';
-        }
-        return implode('.', $version_parts);
-    }
-
-
-    /**
-     * Returns whether or not the min core version requirement of the addon is met
-     *
-     * @param string $min_core_version    the minimum core version required by the addon
-     * @param string $actual_core_version the actual core version, optional
-     * @return bool
-     */
-    public static function _meets_min_core_version_requirement(
-        string $min_core_version,
-        string $actual_core_version = EVENT_ESPRESSO_VERSION
-    ): bool {
-        return version_compare(
-            self::_effective_version($actual_core_version),
-            self::_effective_version($min_core_version),
-            '>='
-        );
-    }
-
-
-    /**
-     * Method for registering new EE_Addons.
-     * Should be called AFTER AHEE__EE_System__load_espresso_addons but BEFORE
-     * AHEE__EE_System___detect_if_activation_or_upgrade__begin in order to register all its components. However, it
-     * may also be called after the 'activate_plugin' action (when an addon is activated), because an activating addon
-     * won't be loaded by WP until after AHEE__EE_System__load_espresso_addons has fired. If its called after
-     * 'activate_plugin', it registers the addon still, but its components are not registered
-     * (they shouldn't be needed anyways, because it's just an activation request and they won't have a chance to do
-     * anything anyways). Instead, it just sets the newly-activated addon's activation indicator wp option and returns
-     * (so that we can detect that the addon has activated on the subsequent request)
-     *
-     * @param string                  $addon_name                       [Required] the EE_Addon's name.
-     * @param array                   $setup_args                       {
-     *                                                                  An array of arguments provided for registering
-     *                                                                  the message type.
-     * @type  string                  $class_name                       the addon's main file name.
-     *                                                                  If left blank, generated from the addon name,
-     *                                                                  changes something like "calendar" to
-     *                                                                  "EE_Calendar"
-     * @type string                   $min_core_version                 the minimum version of EE Core that the
-     *                                                                  addon will work with. eg "4.8.1.rc.084"
-     * @type string                   $version                          the "software" version for the addon. eg
-     *                                                                  "1.0.0.p" for a first stable release, or
-     *                                                                  "1.0.0.rc.043" for a version in progress
-     * @type string                   $main_file_path                   the full server path to the main file
-     *                                                                  loaded directly by WP
-     * @type DomainInterface          $domain                           child class of
-     *                                                                  EventEspresso\core\domain\DomainBase
-     * @type string                   $domain_fqcn                      Fully Qualified Class Name
-     *                                                                  for the addon's Domain class
-     *                                                                  (see EventEspresso\core\domain\Domain)
-     * @type string                   $admin_path                       full server path to the folder where the
-     *                                                                  addon\'s admin files reside
-     * @type string                   $admin_callback                   a method to be called when the EE Admin is
-     *                                                                  first invoked, can be used for hooking into
-     *                                                                  any admin page
-     * @type string                   $config_section                   the section name for this addon's
-     *                                                                  configuration settings section
-     *                                                                  (defaults to "addons")
-     * @type string                   $config_class                     the class name for this addon's
-     *                                                                  configuration settings object
-     * @type string                   $config_name                      the class name for this addon's
-     *                                                                  configuration settings object
-     * @type string                   $autoloader_paths                 [Required] an array of class names and the full
-     *                                                                  server paths to those files.
-     * @type string                   $autoloader_folders               an array of  "full server paths" for any
-     *                                                                  folders containing classes that might be
-     *                                                                  invoked by the addon
-     * @type string                   $dms_paths                        [Required] an array of full server paths to
-     *                                                                  folders that contain data migration scripts.
-     *                                                                  The key should be the EE_Addon class name that
-     *                                                                  this set of data migration scripts belongs to.
-     *                                                                  If the EE_Addon class is namespaced, then this
-     *                                                                  needs to be the Fully Qualified Class Name
-     * @type string                   $module_paths                     an array of full server paths to any
-     *                                                                  EED_Modules used by the addon
-     * @type string                   $shortcode_paths                  an array of full server paths to folders
-     *                                                                  that contain EES_Shortcodes
-     * @type string                   $widget_paths                     an array of full server paths to folders
-     *                                                                  that contain WP_Widgets
-     * @type array                    $capabilities                     an array indexed by role name
-     *                                                                  (i.e administrator,author ) and the values
-     *                                                                  are an array of caps to add to the role.
-     *                                                                  'administrator' => array(
-     *                                                                  'read_addon',
-     *                                                                  'edit_addon',
-     *                                                                  etc.
-     *                                                                  ).
-     * @type EE_Meta_Capability_Map[] $capability_maps                  an array of EE_Meta_Capability_Map object
-     *                                                                  for any addons that need to register any
-     *                                                                  special meta mapped capabilities.  Should
-     *                                                                  be indexed where the key is the
-     *                                                                  EE_Meta_Capability_Map class name and the
-     *                                                                  values are the arguments sent to the class.
-     * @type array                    $model_paths                      array of folders containing DB models
-     * @return bool
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @since                                                           4.3.0
-     * @see                                                             EE_Register_Model
-     * @type array                    $class_paths                      array of folders containing DB classes
-     * @see                                                             EE_Register_Model
-     * @type array                    $model_extension_paths            array of folders containing DB model
-     *                                                                  extensions
-     * @see                                                             EE_Register_Model_Extension
-     * @type array                    $class_extension_paths            array of folders containing DB class
-     *                                                                  extensions
-     * @see                                                             EE_Register_Model_Extension
-     * @type array message_types {
-     *                                                                  An array of message types with the key as
-     *                                                                  the message type name and the values as
-     *                                                                  below:
-     * @type string                   $mtfilename                       [Required] The filename of the message type
-     *                                                                  being registered. This will be the main
-     *                                                                  EE_{Message Type Name}_message_type class.
-     *                                                                  for example:
-     *                                                                  EE_Declined_Registration_message_type.class.php
-     * @type array                    $autoloadpaths                    [Required] An array of paths to add to the
-     *                                                                  messages autoloader for the new message type.
-     * @type array                    $messengers_to_activate_with      An array of messengers that this message
-     *                                                                  type should activate with. Each value in
-     *                                                                  the
-     *                                                                  array
-     *                                                                  should match the name property of a
-     *                                                                  EE_messenger. Optional.
-     * @type array                    $messengers_to_validate_with      An array of messengers that this message
-     *                                                                  type should validate with. Each value in
-     *                                                                  the
-     *                                                                  array
-     *                                                                  should match the name property of an
-     *                                                                  EE_messenger.
-     *                                                                  Optional.
-     *                                                                  }
-     * @type array                    $custom_post_types
-     * @type array                    $custom_taxonomies
-     * @type array                    $payment_method_paths             each element is the folder containing the
-     *                                                                  EE_PMT_Base child class
-     *                                                                  (eg,
-     *                                                                  '/wp-content/plugins/my_plugin/Payomatic/'
-     *                                                                  which contains the files
-     *                                                                  EE_PMT_Payomatic.pm.php)
-     * @type array                    $default_terms
-     * @type array                    $namespace                        {
-     *                                                                  An array with two items for registering the
-     *                                                                  addon's namespace. (If, for some reason, you
-     *                                                                  require additional namespaces,
-     *                                                                  use
-     *                                                                  EventEspresso\core\Psr4Autoloader::addNamespace()
-     *                                                                  directly)
-     * @see                                                             EventEspresso\core\Psr4Autoloader::addNamespace()
-     * @type string                   $FQNS                             the namespace prefix
-     * @type string                   $DIR                              a base directory for class files in the
-     *                                                                  namespace.
-     *                                                                  }
-     *                                                                  }
-     * @type string                   $privacy_policies                 FQNSs (namespaces, each of which contains only
-     *                                                                  privacy policy classes) or FQCNs (specific
-     *                                                                  classnames of privacy policy classes)
-     * @type string                   $personal_data_exporters          FQNSs (namespaces, each of which contains only
-     *                                                                  privacy policy classes) or FQCNs (specific
-     *                                                                  classnames of privacy policy classes)
-     * @type string                   $personal_data_erasers            FQNSs (namespaces, each of which contains only
-     *                                                                  privacy policy classes) or FQCNs (specific
-     *                                                                  classnames of privacy policy classes)
-     */
-    public static function register(string $addon_name = '', array $setup_args = []): bool
-    {
-        if (! self::$loader instanceof LoaderInterface) {
-            self::$loader = LoaderFactory::getLoader();
-        }
-        // make sure this was called in the right place!
-        if (
-            ! did_action('activate_plugin')
-            && (
-                ! did_action('AHEE__EE_System__load_espresso_addons')
-                || did_action('AHEE__EE_System___detect_if_activation_or_upgrade__begin')
-            )
-        ) {
-            EE_Error::doing_it_wrong(
-                __METHOD__,
-                sprintf(
-                    esc_html__(
-                        'An attempt to register an EE_Addon named "%s" has failed because it was not registered at the correct time.  Please use the "AHEE__EE_System__load_espresso_addons" hook to register addons.',
-                        'event_espresso'
-                    ),
-                    $addon_name
-                ),
-                '4.3.0'
-            );
-            return false;
-        }
-        // required fields MUST be present, so let's make sure they are.
-        EE_Register_Addon::_verify_parameters($addon_name, $setup_args);
-        // get class name for addon
-        $class_name = EE_Register_Addon::_parse_class_name($addon_name, $setup_args);
-        // setup $_settings array from incoming values.
-        $addon_settings = EE_Register_Addon::_get_addon_settings($class_name, $setup_args);
-        // allow early addon setup or modification of addon api settings
-        self::$_settings = (array) apply_filters(
-            'FHEE__EE_Register_Addon__register',
-            self::$_settings,
-            $addon_name,
-            $class_name,
-            $setup_args
-        );
-        // does this addon work with this version of core or WordPress ?
-        // does this addon work with this version of core or WordPress ?
-        if (! EE_Register_Addon::_addon_is_compatible($addon_name, $addon_settings)) {
-            return false;
-        }
-        // register namespaces
-        EE_Register_Addon::_setup_namespaces($addon_settings);
-        // check if this is an activation request
-        if (EE_Register_Addon::_addon_activation($addon_name, $addon_settings)) {
-            // dont bother setting up the rest of the addon atm
-            return false;
-        }
-        // we need cars
-        EE_Register_Addon::_setup_autoloaders($addon_name);
-        // register new models and extensions
-        EE_Register_Addon::_register_models_and_extensions($addon_name);
-        // setup DMS
-        EE_Register_Addon::_register_data_migration_scripts($addon_name);
-        // if config_class is present let's register config.
-        EE_Register_Addon::_register_config($addon_name);
-        // register admin pages
-        EE_Register_Addon::_register_admin_pages($addon_name);
-        // add to list of modules to be registered
-        EE_Register_Addon::_register_modules($addon_name);
-        // add to list of shortcodes to be registered
-        EE_Register_Addon::_register_shortcodes($addon_name);
-        // add to list of widgets to be registered
-        EE_Register_Addon::_register_widgets($addon_name);
-        // register capability related stuff.
-        EE_Register_Addon::_register_capabilities($addon_name);
-        // any message type to register?
-        EE_Register_Addon::_register_message_types($addon_name);
-        // any custom post type/ custom capabilities or default terms to register
-        EE_Register_Addon::_register_custom_post_types($addon_name);
-        // and any payment methods
-        EE_Register_Addon::_register_payment_methods($addon_name);
-        // and privacy policy generators
-        EE_Register_Addon::registerPrivacyPolicies($addon_name);
-        // and privacy policy generators
-        EE_Register_Addon::registerPersonalDataExporters($addon_name);
-        // and privacy policy generators
-        EE_Register_Addon::registerPersonalDataErasers($addon_name);
-        // load and instantiate main addon class
-        $addon = EE_Register_Addon::_load_and_init_addon_class($addon_name);
-        // delay calling after_registration hook on each addon until after all add-ons have been registered.
-        add_action('AHEE__EE_System__load_espresso_addons__complete', [$addon, 'after_registration'], 999);
-        return $addon instanceof EE_Addon;
-    }
-
-
-    /**
-     * @param string $addon_name
-     * @param array  $setup_args
-     * @return void
-     * @throws EE_Error
-     */
-    private static function _verify_parameters(string $addon_name, array $setup_args)
-    {
-        // required fields MUST be present, so let's make sure they are.
-        if (empty($addon_name) || empty($setup_args)) {
-            throw new EE_Error(
-                esc_html__(
-                    'In order to register an EE_Addon with EE_Register_Addon::register(), you must include the "addon_name" (the name of the addon), and an array of arguments.',
-                    'event_espresso'
-                )
-            );
-        }
-        if (empty($setup_args['main_file_path'])) {
-            throw new EE_Error(
-                sprintf(
-                    esc_html__(
-                        'When registering an addon, you didn\'t provide the "main_file_path", which is the full path to the main file loaded directly by Wordpress. You only provided %s',
-                        'event_espresso'
-                    ),
-                    implode(',', array_keys($setup_args))
-                )
-            );
-        }
-        // check that addon has not already been registered with that name
-        if (isset(self::$_settings[ $addon_name ]) && ! did_action('activate_plugin')) {
-            throw new EE_Error(
-                sprintf(
-                    esc_html__(
-                        'An EE_Addon with the name "%s" has already been registered and each EE_Addon requires a unique name.',
-                        'event_espresso'
-                    ),
-                    $addon_name
-                )
-            );
-        }
-    }
-
-
-    /**
-     * @param string $addon_name
-     * @param array  $setup_args
-     * @return string
-     */
-    private static function _parse_class_name(string $addon_name, array $setup_args): string
-    {
-        if (empty($setup_args['class_name'])) {
-            // generate one by first separating name with spaces
-            $class_name = str_replace(['-', '_'], ' ', trim($addon_name));
-            // capitalize, then replace spaces with underscores
-            $class_name = str_replace(' ', '_', ucwords($class_name));
-        } else {
-            $class_name = $setup_args['class_name'];
-        }
-        // check if classname is fully  qualified or is a legacy classname already prefixed with 'EE_'
-        return strpos($class_name, '\\') || strpos($class_name, 'EE_') === 0
-            ? $class_name
-            : 'EE_' . $class_name;
-    }
-
-
-    /**
-     * @param string $class_name
-     * @param array  $setup_args
-     * @return array
-     */
-    private static function _get_addon_settings(string $class_name, array $setup_args): array
-    {
-        // setup $_settings array from incoming values.
-        $addon_settings = [
-            // generated from the addon name, changes something like "calendar" to "EE_Calendar"
-            'class_name'            => $class_name,
-            // the addon slug for use in URLs, etc
-            'plugin_slug'           => isset($setup_args['plugin_slug'])
-                ? (string) $setup_args['plugin_slug']
-                : '',
-            // page slug to be used when generating the "Settings" link on the WP plugin page
-            'plugin_action_slug'    => isset($setup_args['plugin_action_slug'])
-                ? (string) $setup_args['plugin_action_slug']
-                : '',
-            // the "software" version for the addon
-            'version'               => isset($setup_args['version'])
-                ? (string) $setup_args['version']
-                : '',
-            // the minimum version of EE Core that the addon will work with
-            'min_core_version'      => isset($setup_args['min_core_version'])
-                ? (string) $setup_args['min_core_version']
-                : '',
-            // the minimum version of WordPress that the addon will work with
-            'min_wp_version'        => isset($setup_args['min_wp_version'])
-                ? (string) $setup_args['min_wp_version']
-                : EE_MIN_WP_VER_REQUIRED,
-            // full server path to main file (file loaded directly by WP)
-            'main_file_path'        => isset($setup_args['main_file_path'])
-                ? (string) $setup_args['main_file_path']
-                : '',
-            // instance of \EventEspresso\core\domain\DomainInterface
-            'domain'                => isset($setup_args['domain']) && $setup_args['domain'] instanceof DomainInterface
-                ? $setup_args['domain']
-                : null,
-            // Fully Qualified Class Name for the addon's Domain class
-            'domain_fqcn'           => isset($setup_args['domain_fqcn'])
-                ? (string) $setup_args['domain_fqcn']
-                : '',
-            // path to folder containing files for integrating with the EE core admin and/or setting up EE admin pages
-            'admin_path'            => isset($setup_args['admin_path'])
-                ? (string) $setup_args['admin_path'] : '',
-            // a method to be called when the EE Admin is first invoked, can be used for hooking into any admin page
-            'admin_callback'        => isset($setup_args['admin_callback'])
-                ? (string) $setup_args['admin_callback']
-                : '',
-            // the section name for this addon's configuration settings section (defaults to "addons")
-            'config_section'        => isset($setup_args['config_section'])
-                ? (string) $setup_args['config_section']
-                : 'addons',
-            // the class name for this addon's configuration settings object
-            'config_class'          => isset($setup_args['config_class'])
-                ? (string) $setup_args['config_class'] : '',
-            // the name given to the config for this addons' configuration settings object (optional)
-            'config_name'           => isset($setup_args['config_name'])
-                ? (string) $setup_args['config_name'] : '',
-            // an array of "class names" => "full server paths" for any classes that might be invoked by the addon
-            'autoloader_paths'      => isset($setup_args['autoloader_paths'])
-                ? (array) $setup_args['autoloader_paths']
-                : [],
-            // an array of  "full server paths" for any folders containing classes that might be invoked by the addon
-            'autoloader_folders'    => isset($setup_args['autoloader_folders'])
-                ? (array) $setup_args['autoloader_folders']
-                : [],
-            // array of full server paths to any EE_DMS data migration scripts used by the addon.
-            // The key should be the EE_Addon class name that this set of data migration scripts belongs to.
-            // If the EE_Addon class is namespaced, then this needs to be the Fully Qualified Class Name
-            'dms_paths'             => isset($setup_args['dms_paths'])
-                ? (array) $setup_args['dms_paths']
-                : [],
-            // array of full server paths to any EED_Modules used by the addon
-            'module_paths'          => isset($setup_args['module_paths'])
-                ? (array) $setup_args['module_paths']
-                : [],
-            // array of full server paths to any EES_Shortcodes used by the addon
-            'shortcode_paths'       => isset($setup_args['shortcode_paths'])
-                ? (array) $setup_args['shortcode_paths']
-                : [],
-            'shortcode_fqcns'       => isset($setup_args['shortcode_fqcns'])
-                ? (array) $setup_args['shortcode_fqcns']
-                : [],
-            // array of full server paths to any WP_Widgets used by the addon
-            'widget_paths'          => isset($setup_args['widget_paths'])
-                ? (array) $setup_args['widget_paths']
-                : [],
-            'message_types'         => isset($setup_args['message_types'])
-                ? (array) $setup_args['message_types']
-                : [],
-            'capabilities'          => isset($setup_args['capabilities'])
-                ? (array) $setup_args['capabilities']
-                : [],
-            'capability_maps'       => isset($setup_args['capability_maps'])
-                ? (array) $setup_args['capability_maps']
-                : [],
-            'model_paths'           => isset($setup_args['model_paths'])
-                ? (array) $setup_args['model_paths']
-                : [],
-            'class_paths'           => isset($setup_args['class_paths'])
-                ? (array) $setup_args['class_paths']
-                : [],
-            'model_extension_paths' => isset($setup_args['model_extension_paths'])
-                ? (array) $setup_args['model_extension_paths']
-                : [],
-            'class_extension_paths' => isset($setup_args['class_extension_paths'])
-                ? (array) $setup_args['class_extension_paths']
-                : [],
-            'custom_post_types'     => isset($setup_args['custom_post_types'])
-                ? (array) $setup_args['custom_post_types']
-                : [],
-            'custom_taxonomies'     => isset($setup_args['custom_taxonomies'])
-                ? (array) $setup_args['custom_taxonomies']
-                : [],
-            'payment_method_paths'  => isset($setup_args['payment_method_paths'])
-                ? (array) $setup_args['payment_method_paths']
-                : [],
-            'default_terms'         => isset($setup_args['default_terms'])
-                ? (array) $setup_args['default_terms']
-                : [],
-            // if not empty, inserts a new table row after this plugin's row on the WP Plugins page
-            // that can be used for adding upgrading/marketing info
-            'plugins_page_row'      => isset($setup_args['plugins_page_row'])
-                ? (array) $setup_args['plugins_page_row']
-                : [],
-            'namespace'             => isset(
-                $setup_args['namespace']['FQNS'],
-                $setup_args['namespace']['DIR']
-            )
-                ? (array) $setup_args['namespace']
-                : [],
-            'privacy_policies'      => isset($setup_args['privacy_policies'])
-                ? (array) $setup_args['privacy_policies']
-                : '',
-        ];
-        // if plugin_action_slug is NOT set, but an admin page path IS set,
-        // then let's just use the plugin_slug since that will be used for linking to the admin page
-        $addon_settings['plugin_action_slug'] = empty($addon_settings['plugin_action_slug'])
-                                                && ! empty($addon_settings['admin_path'])
-            ? $addon_settings['plugin_slug']
-            : $addon_settings['plugin_action_slug'];
-        // full server path to main file (file loaded directly by WP)
-        $addon_settings['plugin_basename'] = plugin_basename($addon_settings['main_file_path']);
-        return $addon_settings;
-    }
-
-
-    /**
-     * @param string $addon_name
-     * @param array  $addon_settings
-     * @return bool
-     */
-    private static function _addon_is_compatible(string $addon_name, array $addon_settings): bool
-    {
-        global $wp_version;
-        $incompatibility_message = '';
-        // check whether this addon version is compatible with EE core
-        if (
-            isset(EE_Register_Addon::$_incompatible_addons[ $addon_name ])
-            && ! self::_meets_min_core_version_requirement(
-                EE_Register_Addon::$_incompatible_addons[ $addon_name ],
-                $addon_settings['version']
-            )
-        ) {
-            $incompatibility_message = sprintf(
-                esc_html__(
-                    '%4$sIMPORTANT!%5$sThe Event Espresso "%1$s" addon is not compatible with this version of Event Espresso.%2$sPlease upgrade your "%1$s" addon to version %3$s or newer to resolve this issue.',
-                    'event_espresso'
-                ),
-                $addon_name,
-                '<br />',
-                EE_Register_Addon::$_incompatible_addons[ $addon_name ],
-                '<span style="font-weight: bold; color: #D54E21;">',
-                '</span><br />'
-            );
-        } elseif (
-            ! self::_meets_min_core_version_requirement($addon_settings['min_core_version'], espresso_version())
-        ) {
-            $incompatibility_message = sprintf(
-                esc_html__(
-                    '%5$sIMPORTANT!%6$sThe Event Espresso "%1$s" addon requires Event Espresso Core version "%2$s" or higher in order to run.%4$sYour version of Event Espresso Core is currently at "%3$s". Please upgrade Event Espresso Core first and then re-activate "%1$s".',
-                    'event_espresso'
-                ),
-                $addon_name,
-                self::_effective_version($addon_settings['min_core_version']),
-                self::_effective_version(espresso_version()),
-                '<br />',
-                '<span style="font-weight: bold; color: #D54E21;">',
-                '</span><br />'
-            );
-        } elseif (version_compare($wp_version, $addon_settings['min_wp_version'], '<')) {
-            $incompatibility_message = sprintf(
-                esc_html__(
-                    '%4$sIMPORTANT!%5$sThe Event Espresso "%1$s" addon requires WordPress version "%2$s" or greater.%3$sPlease update your version of WordPress to use the "%1$s" addon and to keep your site secure.',
-                    'event_espresso'
-                ),
-                $addon_name,
-                $addon_settings['min_wp_version'],
-                '<br />',
-                '<span style="font-weight: bold; color: #D54E21;">',
-                '</span><br />'
-            );
-        }
-        if (! empty($incompatibility_message)) {
-            // remove 'activate' from the REQUEST
-            // so WP doesn't erroneously tell the user the plugin activated fine when it didn't
-            /** @var RequestInterface $request */
-            $request = LoaderFactory::getLoader()->getShared(RequestInterface::class);
-            $request->unSetRequestParam('activate', true);
-            if (current_user_can('activate_plugins')) {
-                // show an error message indicating the plugin didn't activate properly
-                EE_Error::add_error($incompatibility_message, __FILE__, __FUNCTION__, __LINE__);
-            }
-            unset($_GET['activate'], $_REQUEST['activate']);
-            if (! function_exists('deactivate_plugins')) {
-                require_once ABSPATH . 'wp-admin/includes/plugin.php';
-            }
-            deactivate_plugins(plugin_basename($addon_settings['main_file_path']));
-            // BAIL FROM THE ADDON REGISTRATION PROCESS
-            return false;
-        }
-        // addon IS compatible
-        return true;
-    }
-
-
-    /**
-     * register namespaces right away before any other files or classes get loaded, but AFTER the version checks
-     *
-     * @param array $addon_settings
-     * @return void
-     */
-    private static function _setup_namespaces(array $addon_settings)
-    {
-        //
-        if (
-            isset(
-                $addon_settings['namespace']['FQNS'],
-                $addon_settings['namespace']['DIR']
-            )
-        ) {
-            EE_Psr4AutoloaderInit::psr4_loader()->addNamespace(
-                $addon_settings['namespace']['FQNS'],
-                $addon_settings['namespace']['DIR']
-            );
-        }
-    }
-
-
-    /**
-     * @param string $addon_name
-     * @param array  $addon_settings
-     * @return bool
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    private static function _addon_activation(string $addon_name, array $addon_settings): bool
-    {
-        // this is an activation request
-        if (did_action('activate_plugin')) {
-            // to find if THIS is the addon that was activated, just check if we have already registered it or not
-            // (as the newly-activated addon wasn't around the first time addons were registered).
-            // Note: the presence of pue_options in the addon registration options will initialize the $_settings
-            // property for the add-on, but the add-on is only partially initialized.  Hence, the additional check.
-            if (
-                ! isset(self::$_settings[ $addon_name ])
-                || (isset(self::$_settings[ $addon_name ])
-                    && ! isset(self::$_settings[ $addon_name ]['class_name'])
-                )
-            ) {
-                self::$_settings[ $addon_name ] = $addon_settings;
-                $addon                          = self::_load_and_init_addon_class($addon_name);
-                $addon->set_activation_indicator_option();
-                // dont bother setting up the rest of the addon.
-                // we know it was just activated and the request will end soon
-            }
-            return true;
-        }
-        // make sure addon settings are set correctly without overwriting anything existing
-        if (isset(self::$_settings[ $addon_name ])) {
-            self::$_settings[ $addon_name ] += $addon_settings;
-        } else {
-            self::$_settings[ $addon_name ] = $addon_settings;
-        }
-        return false;
-    }
-
-
-    /**
-     * @param string $addon_name
-     * @return void
-     * @throws EE_Error
-     */
-    private static function _setup_autoloaders(string $addon_name)
-    {
-        if (! empty(self::$_settings[ $addon_name ]['autoloader_paths'])) {
-            // setup autoloader for single file
-            EEH_Autoloader::instance()->register_autoloader(self::$_settings[ $addon_name ]['autoloader_paths']);
-        }
-        // setup autoloaders for folders
-        if (! empty(self::$_settings[ $addon_name ]['autoloader_folders'])) {
-            foreach ((array) self::$_settings[ $addon_name ]['autoloader_folders'] as $autoloader_folder) {
-                EEH_Autoloader::register_autoloaders_for_each_file_in_folder($autoloader_folder);
-            }
-        }
-    }
-
-
-    /**
-     * register new models and extensions
-     *
-     * @param string $addon_name
-     * @return void
-     * @throws EE_Error
-     */
-    private static function _register_models_and_extensions(string $addon_name)
-    {
-        // register new models
-        if (
-            ! empty(self::$_settings[ $addon_name ]['model_paths'])
-            || ! empty(self::$_settings[ $addon_name ]['class_paths'])
-        ) {
-            EE_Register_Model::register(
-                $addon_name,
-                [
-                    'model_paths' => self::$_settings[ $addon_name ]['model_paths'],
-                    'class_paths' => self::$_settings[ $addon_name ]['class_paths'],
-                ]
-            );
-        }
-        // register model extensions
-        if (
-            ! empty(self::$_settings[ $addon_name ]['model_extension_paths'])
-            || ! empty(self::$_settings[ $addon_name ]['class_extension_paths'])
-        ) {
-            EE_Register_Model_Extensions::register(
-                $addon_name,
-                [
-                    'model_extension_paths' => self::$_settings[ $addon_name ]['model_extension_paths'],
-                    'class_extension_paths' => self::$_settings[ $addon_name ]['class_extension_paths'],
-                ]
-            );
-        }
-    }
-
-
-    /**
-     * @param string $addon_name
-     * @return void
-     * @throws EE_Error
-     */
-    private static function _register_data_migration_scripts(string $addon_name)
-    {
-        // setup DMS
-        if (! empty(self::$_settings[ $addon_name ]['dms_paths'])) {
-            EE_Register_Data_Migration_Scripts::register(
-                $addon_name,
-                ['dms_paths' => self::$_settings[ $addon_name ]['dms_paths']]
-            );
-        }
-    }
-
-
-    /**
-     * @param string $addon_name
-     * @return void
-     * @throws EE_Error
-     */
-    private static function _register_config(string $addon_name)
-    {
-        // if config_class is present let's register config.
-        if (! empty(self::$_settings[ $addon_name ]['config_class'])) {
-            EE_Register_Config::register(
-                self::$_settings[ $addon_name ]['config_class'],
-                [
-                    'config_section' => self::$_settings[ $addon_name ]['config_section'],
-                    'config_name'    => self::$_settings[ $addon_name ]['config_name'],
-                ]
-            );
-        }
-    }
-
-
-    /**
-     * @param string $addon_name
-     * @return void
-     * @throws EE_Error
-     */
-    private static function _register_admin_pages(string $addon_name)
-    {
-        if (! empty(self::$_settings[ $addon_name ]['admin_path'])) {
-            EE_Register_Admin_Page::register(
-                $addon_name,
-                ['page_path' => self::$_settings[ $addon_name ]['admin_path']]
-            );
-        }
-    }
-
-
-    /**
-     * @param string $addon_name
-     * @return void
-     * @throws EE_Error
-     */
-    private static function _register_modules(string $addon_name)
-    {
-        if (! empty(self::$_settings[ $addon_name ]['module_paths'])) {
-            EE_Register_Module::register(
-                $addon_name,
-                ['module_paths' => self::$_settings[ $addon_name ]['module_paths']]
-            );
-        }
-    }
-
-
-    /**
-     * @param string $addon_name
-     * @return void
-     * @throws EE_Error
-     */
-    private static function _register_shortcodes(string $addon_name)
-    {
-        if (
-            ! empty(self::$_settings[ $addon_name ]['shortcode_paths'])
-            || ! empty(self::$_settings[ $addon_name ]['shortcode_fqcns'])
-        ) {
-            EE_Register_Shortcode::register(
-                $addon_name,
-                [
-                    'shortcode_paths' => self::$_settings[ $addon_name ]['shortcode_paths'] ?? [],
-                    'shortcode_fqcns' => self::$_settings[ $addon_name ]['shortcode_fqcns'] ?? [],
-                ]
-            );
-        }
-    }
-
-
-    /**
-     * @param string $addon_name
-     * @return void
-     * @throws EE_Error
-     */
-    private static function _register_widgets(string $addon_name)
-    {
-        if (! empty(self::$_settings[ $addon_name ]['widget_paths'])) {
-            EE_Register_Widget::register(
-                $addon_name,
-                ['widget_paths' => self::$_settings[ $addon_name ]['widget_paths']]
-            );
-        }
-    }
-
-
-    /**
-     * @param string $addon_name
-     * @return void
-     * @throws EE_Error
-     */
-    private static function _register_capabilities(string $addon_name)
-    {
-        if (! empty(self::$_settings[ $addon_name ]['capabilities'])) {
-            EE_Register_Capabilities::register(
-                $addon_name,
-                [
-                    'capabilities'    => self::$_settings[ $addon_name ]['capabilities'],
-                    'capability_maps' => self::$_settings[ $addon_name ]['capability_maps'],
-                ]
-            );
-        }
-    }
-
-
-    /**
-     * @param string $addon_name
-     * @return void
-     */
-    private static function _register_message_types(string $addon_name)
-    {
-        if (! empty(self::$_settings[ $addon_name ]['message_types'])) {
-            add_action(
-                'EE_Brewing_Regular___messages_caf',
-                ['EE_Register_Addon', 'register_message_types']
-            );
-        }
-    }
-
-
-    /**
-     * @param string $addon_name
-     * @return void
-     * @throws EE_Error
-     */
-    private static function _register_custom_post_types(string $addon_name)
-    {
-        if (
-            ! empty(self::$_settings[ $addon_name ]['custom_post_types'])
-            || ! empty(self::$_settings[ $addon_name ]['custom_taxonomies'])
-        ) {
-            EE_Register_CPT::register(
-                $addon_name,
-                [
-                    'cpts'          => self::$_settings[ $addon_name ]['custom_post_types'],
-                    'cts'           => self::$_settings[ $addon_name ]['custom_taxonomies'],
-                    'default_terms' => self::$_settings[ $addon_name ]['default_terms'],
-                ]
-            );
-        }
-    }
-
-
-    /**
-     * @param string $addon_name
-     * @return void
-     * @throws InvalidArgumentException
-     * @throws InvalidInterfaceException
-     * @throws InvalidDataTypeException
-     * @throws DomainException
-     * @throws EE_Error
-     */
-    private static function _register_payment_methods(string $addon_name)
-    {
-        if (! empty(self::$_settings[ $addon_name ]['payment_method_paths'])) {
-            EE_Register_Payment_Method::register(
-                $addon_name,
-                ['payment_method_paths' => self::$_settings[ $addon_name ]['payment_method_paths']]
-            );
-        }
-    }
-
-
-    /**
-     * @param string $addon_name
-     * @return void
-     * @throws InvalidArgumentException
-     * @throws InvalidInterfaceException
-     * @throws InvalidDataTypeException
-     * @throws DomainException
-     */
-    private static function registerPrivacyPolicies(string $addon_name)
-    {
-        if (! empty(self::$_settings[ $addon_name ]['privacy_policies'])) {
-            EE_Register_Privacy_Policy::register(
-                $addon_name,
-                self::$_settings[ $addon_name ]['privacy_policies']
-            );
-        }
-    }
-
-
-    /**
-     * @param string $addon_name
-     * @return void
-     */
-    private static function registerPersonalDataExporters(string $addon_name)
-    {
-        if (! empty(self::$_settings[ $addon_name ]['personal_data_exporters'])) {
-            EE_Register_Personal_Data_Eraser::register(
-                $addon_name,
-                self::$_settings[ $addon_name ]['personal_data_exporters']
-            );
-        }
-    }
-
-
-    /**
-     * @param string $addon_name
-     * @return void
-     */
-    private static function registerPersonalDataErasers(string $addon_name)
-    {
-        if (! empty(self::$_settings[ $addon_name ]['personal_data_erasers'])) {
-            EE_Register_Personal_Data_Eraser::register(
-                $addon_name,
-                self::$_settings[ $addon_name ]['personal_data_erasers']
-            );
-        }
-    }
-
-
-    /**
-     * Loads and instantiates the EE_Addon class and adds it onto the registry
-     *
-     * @param string $addon_name
-     * @return EE_Addon
-     * @throws InvalidArgumentException
-     * @throws InvalidInterfaceException
-     * @throws InvalidDataTypeException
-     */
-    private static function _load_and_init_addon_class(string $addon_name): EE_Addon
-    {
-        $addon = self::$loader->getShared(
-            self::$_settings[ $addon_name ]['class_name'],
-            ['EE_Registry::create(addon)' => true]
-        );
-        if (! $addon instanceof EE_Addon) {
-            throw new DomainException(
-                sprintf(
-                    esc_html__('The "%1$s" EE_Addon class failed to instantiate!', 'event_espresso'),
-                    self::$_settings[ $addon_name ]['class_name']
-                )
-            );
-        }
-        // setter inject dep map if required
-        if ($addon->dependencyMap() === null) {
-            $addon->setDependencyMap(self::$loader->getShared('EE_Dependency_Map'));
-        }
-        // setter inject domain if required
-        EE_Register_Addon::injectAddonDomain($addon_name, $addon);
-
-        $addon->set_name($addon_name);
-        $addon->set_plugin_slug(self::$_settings[ $addon_name ]['plugin_slug']);
-        $addon->set_plugin_basename(self::$_settings[ $addon_name ]['plugin_basename']);
-        $addon->set_main_plugin_file(self::$_settings[ $addon_name ]['main_file_path']);
-        $addon->set_plugin_action_slug(self::$_settings[ $addon_name ]['plugin_action_slug']);
-        $addon->set_plugins_page_row(self::$_settings[ $addon_name ]['plugins_page_row']);
-        $addon->set_version(self::$_settings[ $addon_name ]['version']);
-        $addon->set_min_core_version(self::_effective_version(self::$_settings[ $addon_name ]['min_core_version']));
-        $addon->set_config_section(self::$_settings[ $addon_name ]['config_section']);
-        $addon->set_config_class(self::$_settings[ $addon_name ]['config_class']);
-        $addon->set_config_name(self::$_settings[ $addon_name ]['config_name']);
-        do_action(
-            'AHEE__EE_Register_Addon___load_and_init_addon_class',
-            $addon,
-            $addon_name,
-            self::$_settings
-        );
-        // unfortunately this can't be hooked in upon construction,
-        // because we don't have the plugin's mainfile path upon construction.
-        register_deactivation_hook($addon->get_main_plugin_file(), [$addon, 'deactivation']);
-        // call any additional admin_callback functions during load_admin_controller hook
-        if (! empty(self::$_settings[ $addon_name ]['admin_callback'])) {
-            add_action(
-                'AHEE__EE_System__load_controllers__load_admin_controllers',
-                [$addon, self::$_settings[ $addon_name ]['admin_callback']]
-            );
-        }
-        return $addon;
-    }
-
-
-    /**
-     * @param string   $addon_name
-     * @param EE_Addon $addon
-     * @since   4.10.13.p
-     */
-    private static function injectAddonDomain(string $addon_name, EE_Addon $addon)
-    {
-        if ($addon instanceof RequiresDomainInterface && $addon->domain() === null) {
-            // using supplied Domain object
-            $domain = self::$_settings[ $addon_name ]['domain'] instanceof DomainInterface
-                ? self::$_settings[ $addon_name ]['domain']
-                : null;
-            // or construct one using Domain FQCN
-            if ($domain === null && self::$_settings[ $addon_name ]['domain_fqcn'] !== '') {
-                $domain = self::$loader->getShared(
-                    self::$_settings[ $addon_name ]['domain_fqcn'],
-                    [
-                        new EventEspresso\core\domain\values\FilePath(
-                            self::$_settings[ $addon_name ]['main_file_path']
-                        ),
-                        EventEspresso\core\domain\values\Version::fromString(
-                            self::$_settings[ $addon_name ]['version']
-                        ),
-                    ]
-                );
-            }
-            if ($domain instanceof DomainInterface) {
-                $addon->setDomain($domain);
-            }
-        }
-    }
-
-
-    /**
-     * @return void
-     * @deprecated 5.0.0.p
-     */
-    public static function load_pue_update()
-    {
-        RegisterAddonPUE::loadPueUpdate();
-    }
-
-
-    /**
-     * Callback for EE_Brewing_Regular__messages_caf hook used to register message types.
-     *
-     * @return void
-     * @throws EE_Error
-     * @since 4.4.0
-     */
-    public static function register_message_types()
-    {
-        foreach (self::$_settings as $settings) {
-            if (! empty($settings['message_types'])) {
-                foreach ((array) $settings['message_types'] as $message_type => $message_type_settings) {
-                    EE_Register_Message_Type::register($message_type, $message_type_settings);
-                }
-            }
-        }
-    }
-
-
-    /**
-     * This deregisters an addon that was previously registered with a specific addon_name.
-     *
-     * @param string $addon_name the name for the addon that was previously registered
-     * @throws DomainException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @since    4.3.0
-     */
-    public static function deregister(string $addon_name = '')
-    {
-        if (isset(self::$_settings[ $addon_name ]['class_name'])) {
-            try {
-                do_action('AHEE__EE_Register_Addon__deregister__before', $addon_name);
-                $class_name = self::$_settings[ $addon_name ]['class_name'];
-                if (! empty(self::$_settings[ $addon_name ]['dms_paths'])) {
-                    // setup DMS
-                    EE_Register_Data_Migration_Scripts::deregister($addon_name);
-                }
-                if (! empty(self::$_settings[ $addon_name ]['admin_path'])) {
-                    // register admin page
-                    EE_Register_Admin_Page::deregister($addon_name);
-                }
-                if (! empty(self::$_settings[ $addon_name ]['module_paths'])) {
-                    // add to list of modules to be registered
-                    EE_Register_Module::deregister($addon_name);
-                }
-                if (
-                    ! empty(self::$_settings[ $addon_name ]['shortcode_paths'])
-                    || ! empty(self::$_settings[ $addon_name ]['shortcode_fqcns'])
-                ) {
-                    // add to list of shortcodes to be registered
-                    EE_Register_Shortcode::deregister($addon_name);
-                }
-                if (! empty(self::$_settings[ $addon_name ]['config_class'])) {
-                    // if config_class present let's register config.
-                    EE_Register_Config::deregister(self::$_settings[ $addon_name ]['config_class']);
-                }
-                if (! empty(self::$_settings[ $addon_name ]['widget_paths'])) {
-                    // add to list of widgets to be registered
-                    EE_Register_Widget::deregister($addon_name);
-                }
-                if (
-                    ! empty(self::$_settings[ $addon_name ]['model_paths'])
-                    || ! empty(self::$_settings[ $addon_name ]['class_paths'])
-                ) {
-                    // add to list of shortcodes to be registered
-                    EE_Register_Model::deregister($addon_name);
-                }
-                if (
-                    ! empty(self::$_settings[ $addon_name ]['model_extension_paths'])
-                    || ! empty(self::$_settings[ $addon_name ]['class_extension_paths'])
-                ) {
-                    // add to list of shortcodes to be registered
-                    EE_Register_Model_Extensions::deregister($addon_name);
-                }
-                if (! empty(self::$_settings[ $addon_name ]['message_types'])) {
-                    foreach ((array) self::$_settings[ $addon_name ]['message_types'] as $message_type => $message_type_settings) {
-                        EE_Register_Message_Type::deregister($message_type);
-                    }
-                }
-                // deregister capabilities for addon
-                if (
-                    ! empty(self::$_settings[ $addon_name ]['capabilities'])
-                    || ! empty(self::$_settings[ $addon_name ]['capability_maps'])
-                ) {
-                    EE_Register_Capabilities::deregister($addon_name);
-                }
-                // deregister custom_post_types for addon
-                if (! empty(self::$_settings[ $addon_name ]['custom_post_types'])) {
-                    EE_Register_CPT::deregister($addon_name);
-                }
-                if (! empty(self::$_settings[ $addon_name ]['payment_method_paths'])) {
-                    EE_Register_Payment_Method::deregister($addon_name);
-                }
-                $addon = EE_Registry::instance()->getAddon($class_name);
-                if ($addon instanceof EE_Addon) {
-                    remove_action(
-                        'deactivate_' . $addon->get_main_plugin_file_basename(),
-                        [$addon, 'deactivation']
-                    );
-                    remove_action(
-                        'AHEE__EE_System__perform_activations_upgrades_and_migrations',
-                        [$addon, 'initialize_db_if_no_migrations_required']
-                    );
-                    // remove `after_registration` call
-                    remove_action(
-                        'AHEE__EE_System__load_espresso_addons__complete',
-                        [$addon, 'after_registration'],
-                        999
-                    );
-                }
-                EE_Registry::instance()->removeAddon($class_name);
-                LoaderFactory::getLoader()->remove($class_name);
-            } catch (OutOfBoundsException $addon_not_yet_registered_exception) {
-                // the add-on was not yet registered in the registry,
-                // so RegistryContainer::__get() throws this exception.
-                // also no need to worry about this or log it,
-                // it's ok to deregister an add-on before its registered in the registry
-            } catch (Exception $e) {
-                new ExceptionLogger($e);
-            }
-            unset(self::$_settings[ $addon_name ]);
-            do_action('AHEE__EE_Register_Addon__deregister__after', $addon_name);
-        }
-    }
+	/**
+	 * possibly truncated version of the EE core version string
+	 *
+	 * @var string
+	 */
+	protected static $_core_version = '';
+
+	/**
+	 * Holds values for registered addons
+	 *
+	 * @var array
+	 */
+	protected static $_settings = [];
+
+	/**
+	 * @var  array $_incompatible_addons keys are addon SLUGS
+	 * (first argument passed to EE_Register_Addon::register()), keys are
+	 * their MINIMUM VERSION (with all 5 parts. Eg 1.2.3.rc.004).
+	 * Generally this should be used sparingly, as we don't want to muddle up
+	 * EE core with knowledge of ALL the addons out there.
+	 * If you want NO versions of an addon to run with a certain version of core,
+	 * it's usually best to define the addon's "min_core_version" as part of its call
+	 * to EE_Register_Addon::register(), rather than using this array with a super high value for its
+	 * minimum plugin version.
+	 * @access    protected
+	 */
+	protected static $_incompatible_addons = [
+		'Multi_Event_Registration' => '2.0.11.rc.002',
+		'Promotions'               => '1.0.0.rc.084',
+	];
+
+	/**
+	 * @var LoaderInterface
+	 */
+	protected static $loader;
+
+
+	/**
+	 * We should always be comparing core to a version like '4.3.0.rc.000',
+	 * not just '4.3.0'.
+	 * So if the addon developer doesn't provide that full version string,
+	 * fill in the blanks for them
+	 *
+	 * @param string $min_core_version
+	 * @return string always like '4.3.0.rc.000'
+	 */
+	protected static function _effective_version(string $min_core_version): string
+	{
+		// versions: 4 . 3 . 1 . p . 123
+		// offsets:    0 . 1 . 2 . 3 . 4
+		$version_parts = explode('.', $min_core_version);
+		// check they specified the micro version (after 2nd period)
+		if (! isset($version_parts[2])) {
+			$version_parts[2] = '0';
+		}
+		// if they didn't specify the 'p', or 'rc' part. Just assume the lowest possible
+		// soon we can assume that's 'rc', but this current version is 'alpha'
+		if (! isset($version_parts[3])) {
+			$version_parts[3] = 'dev';
+		}
+		if (! isset($version_parts[4])) {
+			$version_parts[4] = '000';
+		}
+		return implode('.', $version_parts);
+	}
+
+
+	/**
+	 * Returns whether or not the min core version requirement of the addon is met
+	 *
+	 * @param string $min_core_version    the minimum core version required by the addon
+	 * @param string $actual_core_version the actual core version, optional
+	 * @return bool
+	 */
+	public static function _meets_min_core_version_requirement(
+		string $min_core_version,
+		string $actual_core_version = EVENT_ESPRESSO_VERSION
+	): bool {
+		return version_compare(
+			self::_effective_version($actual_core_version),
+			self::_effective_version($min_core_version),
+			'>='
+		);
+	}
+
+
+	/**
+	 * Method for registering new EE_Addons.
+	 * Should be called AFTER AHEE__EE_System__load_espresso_addons but BEFORE
+	 * AHEE__EE_System___detect_if_activation_or_upgrade__begin in order to register all its components. However, it
+	 * may also be called after the 'activate_plugin' action (when an addon is activated), because an activating addon
+	 * won't be loaded by WP until after AHEE__EE_System__load_espresso_addons has fired. If its called after
+	 * 'activate_plugin', it registers the addon still, but its components are not registered
+	 * (they shouldn't be needed anyways, because it's just an activation request and they won't have a chance to do
+	 * anything anyways). Instead, it just sets the newly-activated addon's activation indicator wp option and returns
+	 * (so that we can detect that the addon has activated on the subsequent request)
+	 *
+	 * @param string                  $addon_name                       [Required] the EE_Addon's name.
+	 * @param array                   $setup_args                       {
+	 *                                                                  An array of arguments provided for registering
+	 *                                                                  the message type.
+	 * @type  string                  $class_name                       the addon's main file name.
+	 *                                                                  If left blank, generated from the addon name,
+	 *                                                                  changes something like "calendar" to
+	 *                                                                  "EE_Calendar"
+	 * @type string                   $min_core_version                 the minimum version of EE Core that the
+	 *                                                                  addon will work with. eg "4.8.1.rc.084"
+	 * @type string                   $version                          the "software" version for the addon. eg
+	 *                                                                  "1.0.0.p" for a first stable release, or
+	 *                                                                  "1.0.0.rc.043" for a version in progress
+	 * @type string                   $main_file_path                   the full server path to the main file
+	 *                                                                  loaded directly by WP
+	 * @type DomainInterface          $domain                           child class of
+	 *                                                                  EventEspresso\core\domain\DomainBase
+	 * @type string                   $domain_fqcn                      Fully Qualified Class Name
+	 *                                                                  for the addon's Domain class
+	 *                                                                  (see EventEspresso\core\domain\Domain)
+	 * @type string                   $admin_path                       full server path to the folder where the
+	 *                                                                  addon\'s admin files reside
+	 * @type string                   $admin_callback                   a method to be called when the EE Admin is
+	 *                                                                  first invoked, can be used for hooking into
+	 *                                                                  any admin page
+	 * @type string                   $config_section                   the section name for this addon's
+	 *                                                                  configuration settings section
+	 *                                                                  (defaults to "addons")
+	 * @type string                   $config_class                     the class name for this addon's
+	 *                                                                  configuration settings object
+	 * @type string                   $config_name                      the class name for this addon's
+	 *                                                                  configuration settings object
+	 * @type string                   $autoloader_paths                 [Required] an array of class names and the full
+	 *                                                                  server paths to those files.
+	 * @type string                   $autoloader_folders               an array of  "full server paths" for any
+	 *                                                                  folders containing classes that might be
+	 *                                                                  invoked by the addon
+	 * @type string                   $dms_paths                        [Required] an array of full server paths to
+	 *                                                                  folders that contain data migration scripts.
+	 *                                                                  The key should be the EE_Addon class name that
+	 *                                                                  this set of data migration scripts belongs to.
+	 *                                                                  If the EE_Addon class is namespaced, then this
+	 *                                                                  needs to be the Fully Qualified Class Name
+	 * @type string                   $module_paths                     an array of full server paths to any
+	 *                                                                  EED_Modules used by the addon
+	 * @type string                   $shortcode_paths                  an array of full server paths to folders
+	 *                                                                  that contain EES_Shortcodes
+	 * @type string                   $widget_paths                     an array of full server paths to folders
+	 *                                                                  that contain WP_Widgets
+	 * @type array                    $capabilities                     an array indexed by role name
+	 *                                                                  (i.e administrator,author ) and the values
+	 *                                                                  are an array of caps to add to the role.
+	 *                                                                  'administrator' => array(
+	 *                                                                  'read_addon',
+	 *                                                                  'edit_addon',
+	 *                                                                  etc.
+	 *                                                                  ).
+	 * @type EE_Meta_Capability_Map[] $capability_maps                  an array of EE_Meta_Capability_Map object
+	 *                                                                  for any addons that need to register any
+	 *                                                                  special meta mapped capabilities.  Should
+	 *                                                                  be indexed where the key is the
+	 *                                                                  EE_Meta_Capability_Map class name and the
+	 *                                                                  values are the arguments sent to the class.
+	 * @type array                    $model_paths                      array of folders containing DB models
+	 * @return bool
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @since                                                           4.3.0
+	 * @see                                                             EE_Register_Model
+	 * @type array                    $class_paths                      array of folders containing DB classes
+	 * @see                                                             EE_Register_Model
+	 * @type array                    $model_extension_paths            array of folders containing DB model
+	 *                                                                  extensions
+	 * @see                                                             EE_Register_Model_Extension
+	 * @type array                    $class_extension_paths            array of folders containing DB class
+	 *                                                                  extensions
+	 * @see                                                             EE_Register_Model_Extension
+	 * @type array message_types {
+	 *                                                                  An array of message types with the key as
+	 *                                                                  the message type name and the values as
+	 *                                                                  below:
+	 * @type string                   $mtfilename                       [Required] The filename of the message type
+	 *                                                                  being registered. This will be the main
+	 *                                                                  EE_{Message Type Name}_message_type class.
+	 *                                                                  for example:
+	 *                                                                  EE_Declined_Registration_message_type.class.php
+	 * @type array                    $autoloadpaths                    [Required] An array of paths to add to the
+	 *                                                                  messages autoloader for the new message type.
+	 * @type array                    $messengers_to_activate_with      An array of messengers that this message
+	 *                                                                  type should activate with. Each value in
+	 *                                                                  the
+	 *                                                                  array
+	 *                                                                  should match the name property of a
+	 *                                                                  EE_messenger. Optional.
+	 * @type array                    $messengers_to_validate_with      An array of messengers that this message
+	 *                                                                  type should validate with. Each value in
+	 *                                                                  the
+	 *                                                                  array
+	 *                                                                  should match the name property of an
+	 *                                                                  EE_messenger.
+	 *                                                                  Optional.
+	 *                                                                  }
+	 * @type array                    $custom_post_types
+	 * @type array                    $custom_taxonomies
+	 * @type array                    $payment_method_paths             each element is the folder containing the
+	 *                                                                  EE_PMT_Base child class
+	 *                                                                  (eg,
+	 *                                                                  '/wp-content/plugins/my_plugin/Payomatic/'
+	 *                                                                  which contains the files
+	 *                                                                  EE_PMT_Payomatic.pm.php)
+	 * @type array                    $default_terms
+	 * @type array                    $namespace                        {
+	 *                                                                  An array with two items for registering the
+	 *                                                                  addon's namespace. (If, for some reason, you
+	 *                                                                  require additional namespaces,
+	 *                                                                  use
+	 *                                                                  EventEspresso\core\Psr4Autoloader::addNamespace()
+	 *                                                                  directly)
+	 * @see                                                             EventEspresso\core\Psr4Autoloader::addNamespace()
+	 * @type string                   $FQNS                             the namespace prefix
+	 * @type string                   $DIR                              a base directory for class files in the
+	 *                                                                  namespace.
+	 *                                                                  }
+	 *                                                                  }
+	 * @type string                   $privacy_policies                 FQNSs (namespaces, each of which contains only
+	 *                                                                  privacy policy classes) or FQCNs (specific
+	 *                                                                  classnames of privacy policy classes)
+	 * @type string                   $personal_data_exporters          FQNSs (namespaces, each of which contains only
+	 *                                                                  privacy policy classes) or FQCNs (specific
+	 *                                                                  classnames of privacy policy classes)
+	 * @type string                   $personal_data_erasers            FQNSs (namespaces, each of which contains only
+	 *                                                                  privacy policy classes) or FQCNs (specific
+	 *                                                                  classnames of privacy policy classes)
+	 */
+	public static function register(string $addon_name = '', array $setup_args = []): bool
+	{
+		if (! self::$loader instanceof LoaderInterface) {
+			self::$loader = LoaderFactory::getLoader();
+		}
+		// make sure this was called in the right place!
+		if (
+			! did_action('activate_plugin')
+			&& (
+				! did_action('AHEE__EE_System__load_espresso_addons')
+				|| did_action('AHEE__EE_System___detect_if_activation_or_upgrade__begin')
+			)
+		) {
+			EE_Error::doing_it_wrong(
+				__METHOD__,
+				sprintf(
+					esc_html__(
+						'An attempt to register an EE_Addon named "%s" has failed because it was not registered at the correct time.  Please use the "AHEE__EE_System__load_espresso_addons" hook to register addons.',
+						'event_espresso'
+					),
+					$addon_name
+				),
+				'4.3.0'
+			);
+			return false;
+		}
+		// required fields MUST be present, so let's make sure they are.
+		EE_Register_Addon::_verify_parameters($addon_name, $setup_args);
+		// get class name for addon
+		$class_name = EE_Register_Addon::_parse_class_name($addon_name, $setup_args);
+		// setup $_settings array from incoming values.
+		$addon_settings = EE_Register_Addon::_get_addon_settings($class_name, $setup_args);
+		// allow early addon setup or modification of addon api settings
+		self::$_settings = (array) apply_filters(
+			'FHEE__EE_Register_Addon__register',
+			self::$_settings,
+			$addon_name,
+			$class_name,
+			$setup_args
+		);
+		// does this addon work with this version of core or WordPress ?
+		// does this addon work with this version of core or WordPress ?
+		if (! EE_Register_Addon::_addon_is_compatible($addon_name, $addon_settings)) {
+			return false;
+		}
+		// register namespaces
+		EE_Register_Addon::_setup_namespaces($addon_settings);
+		// check if this is an activation request
+		if (EE_Register_Addon::_addon_activation($addon_name, $addon_settings)) {
+			// dont bother setting up the rest of the addon atm
+			return false;
+		}
+		// we need cars
+		EE_Register_Addon::_setup_autoloaders($addon_name);
+		// register new models and extensions
+		EE_Register_Addon::_register_models_and_extensions($addon_name);
+		// setup DMS
+		EE_Register_Addon::_register_data_migration_scripts($addon_name);
+		// if config_class is present let's register config.
+		EE_Register_Addon::_register_config($addon_name);
+		// register admin pages
+		EE_Register_Addon::_register_admin_pages($addon_name);
+		// add to list of modules to be registered
+		EE_Register_Addon::_register_modules($addon_name);
+		// add to list of shortcodes to be registered
+		EE_Register_Addon::_register_shortcodes($addon_name);
+		// add to list of widgets to be registered
+		EE_Register_Addon::_register_widgets($addon_name);
+		// register capability related stuff.
+		EE_Register_Addon::_register_capabilities($addon_name);
+		// any message type to register?
+		EE_Register_Addon::_register_message_types($addon_name);
+		// any custom post type/ custom capabilities or default terms to register
+		EE_Register_Addon::_register_custom_post_types($addon_name);
+		// and any payment methods
+		EE_Register_Addon::_register_payment_methods($addon_name);
+		// and privacy policy generators
+		EE_Register_Addon::registerPrivacyPolicies($addon_name);
+		// and privacy policy generators
+		EE_Register_Addon::registerPersonalDataExporters($addon_name);
+		// and privacy policy generators
+		EE_Register_Addon::registerPersonalDataErasers($addon_name);
+		// load and instantiate main addon class
+		$addon = EE_Register_Addon::_load_and_init_addon_class($addon_name);
+		// delay calling after_registration hook on each addon until after all add-ons have been registered.
+		add_action('AHEE__EE_System__load_espresso_addons__complete', [$addon, 'after_registration'], 999);
+		return $addon instanceof EE_Addon;
+	}
+
+
+	/**
+	 * @param string $addon_name
+	 * @param array  $setup_args
+	 * @return void
+	 * @throws EE_Error
+	 */
+	private static function _verify_parameters(string $addon_name, array $setup_args)
+	{
+		// required fields MUST be present, so let's make sure they are.
+		if (empty($addon_name) || empty($setup_args)) {
+			throw new EE_Error(
+				esc_html__(
+					'In order to register an EE_Addon with EE_Register_Addon::register(), you must include the "addon_name" (the name of the addon), and an array of arguments.',
+					'event_espresso'
+				)
+			);
+		}
+		if (empty($setup_args['main_file_path'])) {
+			throw new EE_Error(
+				sprintf(
+					esc_html__(
+						'When registering an addon, you didn\'t provide the "main_file_path", which is the full path to the main file loaded directly by Wordpress. You only provided %s',
+						'event_espresso'
+					),
+					implode(',', array_keys($setup_args))
+				)
+			);
+		}
+		// check that addon has not already been registered with that name
+		if (isset(self::$_settings[ $addon_name ]) && ! did_action('activate_plugin')) {
+			throw new EE_Error(
+				sprintf(
+					esc_html__(
+						'An EE_Addon with the name "%s" has already been registered and each EE_Addon requires a unique name.',
+						'event_espresso'
+					),
+					$addon_name
+				)
+			);
+		}
+	}
+
+
+	/**
+	 * @param string $addon_name
+	 * @param array  $setup_args
+	 * @return string
+	 */
+	private static function _parse_class_name(string $addon_name, array $setup_args): string
+	{
+		if (empty($setup_args['class_name'])) {
+			// generate one by first separating name with spaces
+			$class_name = str_replace(['-', '_'], ' ', trim($addon_name));
+			// capitalize, then replace spaces with underscores
+			$class_name = str_replace(' ', '_', ucwords($class_name));
+		} else {
+			$class_name = $setup_args['class_name'];
+		}
+		// check if classname is fully  qualified or is a legacy classname already prefixed with 'EE_'
+		return strpos($class_name, '\\') || strpos($class_name, 'EE_') === 0
+			? $class_name
+			: 'EE_' . $class_name;
+	}
+
+
+	/**
+	 * @param string $class_name
+	 * @param array  $setup_args
+	 * @return array
+	 */
+	private static function _get_addon_settings(string $class_name, array $setup_args): array
+	{
+		// setup $_settings array from incoming values.
+		$addon_settings = [
+			// generated from the addon name, changes something like "calendar" to "EE_Calendar"
+			'class_name'            => $class_name,
+			// the addon slug for use in URLs, etc
+			'plugin_slug'           => isset($setup_args['plugin_slug'])
+				? (string) $setup_args['plugin_slug']
+				: '',
+			// page slug to be used when generating the "Settings" link on the WP plugin page
+			'plugin_action_slug'    => isset($setup_args['plugin_action_slug'])
+				? (string) $setup_args['plugin_action_slug']
+				: '',
+			// the "software" version for the addon
+			'version'               => isset($setup_args['version'])
+				? (string) $setup_args['version']
+				: '',
+			// the minimum version of EE Core that the addon will work with
+			'min_core_version'      => isset($setup_args['min_core_version'])
+				? (string) $setup_args['min_core_version']
+				: '',
+			// the minimum version of WordPress that the addon will work with
+			'min_wp_version'        => isset($setup_args['min_wp_version'])
+				? (string) $setup_args['min_wp_version']
+				: EE_MIN_WP_VER_REQUIRED,
+			// full server path to main file (file loaded directly by WP)
+			'main_file_path'        => isset($setup_args['main_file_path'])
+				? (string) $setup_args['main_file_path']
+				: '',
+			// instance of \EventEspresso\core\domain\DomainInterface
+			'domain'                => isset($setup_args['domain']) && $setup_args['domain'] instanceof DomainInterface
+				? $setup_args['domain']
+				: null,
+			// Fully Qualified Class Name for the addon's Domain class
+			'domain_fqcn'           => isset($setup_args['domain_fqcn'])
+				? (string) $setup_args['domain_fqcn']
+				: '',
+			// path to folder containing files for integrating with the EE core admin and/or setting up EE admin pages
+			'admin_path'            => isset($setup_args['admin_path'])
+				? (string) $setup_args['admin_path'] : '',
+			// a method to be called when the EE Admin is first invoked, can be used for hooking into any admin page
+			'admin_callback'        => isset($setup_args['admin_callback'])
+				? (string) $setup_args['admin_callback']
+				: '',
+			// the section name for this addon's configuration settings section (defaults to "addons")
+			'config_section'        => isset($setup_args['config_section'])
+				? (string) $setup_args['config_section']
+				: 'addons',
+			// the class name for this addon's configuration settings object
+			'config_class'          => isset($setup_args['config_class'])
+				? (string) $setup_args['config_class'] : '',
+			// the name given to the config for this addons' configuration settings object (optional)
+			'config_name'           => isset($setup_args['config_name'])
+				? (string) $setup_args['config_name'] : '',
+			// an array of "class names" => "full server paths" for any classes that might be invoked by the addon
+			'autoloader_paths'      => isset($setup_args['autoloader_paths'])
+				? (array) $setup_args['autoloader_paths']
+				: [],
+			// an array of  "full server paths" for any folders containing classes that might be invoked by the addon
+			'autoloader_folders'    => isset($setup_args['autoloader_folders'])
+				? (array) $setup_args['autoloader_folders']
+				: [],
+			// array of full server paths to any EE_DMS data migration scripts used by the addon.
+			// The key should be the EE_Addon class name that this set of data migration scripts belongs to.
+			// If the EE_Addon class is namespaced, then this needs to be the Fully Qualified Class Name
+			'dms_paths'             => isset($setup_args['dms_paths'])
+				? (array) $setup_args['dms_paths']
+				: [],
+			// array of full server paths to any EED_Modules used by the addon
+			'module_paths'          => isset($setup_args['module_paths'])
+				? (array) $setup_args['module_paths']
+				: [],
+			// array of full server paths to any EES_Shortcodes used by the addon
+			'shortcode_paths'       => isset($setup_args['shortcode_paths'])
+				? (array) $setup_args['shortcode_paths']
+				: [],
+			'shortcode_fqcns'       => isset($setup_args['shortcode_fqcns'])
+				? (array) $setup_args['shortcode_fqcns']
+				: [],
+			// array of full server paths to any WP_Widgets used by the addon
+			'widget_paths'          => isset($setup_args['widget_paths'])
+				? (array) $setup_args['widget_paths']
+				: [],
+			'message_types'         => isset($setup_args['message_types'])
+				? (array) $setup_args['message_types']
+				: [],
+			'capabilities'          => isset($setup_args['capabilities'])
+				? (array) $setup_args['capabilities']
+				: [],
+			'capability_maps'       => isset($setup_args['capability_maps'])
+				? (array) $setup_args['capability_maps']
+				: [],
+			'model_paths'           => isset($setup_args['model_paths'])
+				? (array) $setup_args['model_paths']
+				: [],
+			'class_paths'           => isset($setup_args['class_paths'])
+				? (array) $setup_args['class_paths']
+				: [],
+			'model_extension_paths' => isset($setup_args['model_extension_paths'])
+				? (array) $setup_args['model_extension_paths']
+				: [],
+			'class_extension_paths' => isset($setup_args['class_extension_paths'])
+				? (array) $setup_args['class_extension_paths']
+				: [],
+			'custom_post_types'     => isset($setup_args['custom_post_types'])
+				? (array) $setup_args['custom_post_types']
+				: [],
+			'custom_taxonomies'     => isset($setup_args['custom_taxonomies'])
+				? (array) $setup_args['custom_taxonomies']
+				: [],
+			'payment_method_paths'  => isset($setup_args['payment_method_paths'])
+				? (array) $setup_args['payment_method_paths']
+				: [],
+			'default_terms'         => isset($setup_args['default_terms'])
+				? (array) $setup_args['default_terms']
+				: [],
+			// if not empty, inserts a new table row after this plugin's row on the WP Plugins page
+			// that can be used for adding upgrading/marketing info
+			'plugins_page_row'      => isset($setup_args['plugins_page_row'])
+				? (array) $setup_args['plugins_page_row']
+				: [],
+			'namespace'             => isset(
+				$setup_args['namespace']['FQNS'],
+				$setup_args['namespace']['DIR']
+			)
+				? (array) $setup_args['namespace']
+				: [],
+			'privacy_policies'      => isset($setup_args['privacy_policies'])
+				? (array) $setup_args['privacy_policies']
+				: '',
+		];
+		// if plugin_action_slug is NOT set, but an admin page path IS set,
+		// then let's just use the plugin_slug since that will be used for linking to the admin page
+		$addon_settings['plugin_action_slug'] = empty($addon_settings['plugin_action_slug'])
+												&& ! empty($addon_settings['admin_path'])
+			? $addon_settings['plugin_slug']
+			: $addon_settings['plugin_action_slug'];
+		// full server path to main file (file loaded directly by WP)
+		$addon_settings['plugin_basename'] = plugin_basename($addon_settings['main_file_path']);
+		return $addon_settings;
+	}
+
+
+	/**
+	 * @param string $addon_name
+	 * @param array  $addon_settings
+	 * @return bool
+	 */
+	private static function _addon_is_compatible(string $addon_name, array $addon_settings): bool
+	{
+		global $wp_version;
+		$incompatibility_message = '';
+		// check whether this addon version is compatible with EE core
+		if (
+			isset(EE_Register_Addon::$_incompatible_addons[ $addon_name ])
+			&& ! self::_meets_min_core_version_requirement(
+				EE_Register_Addon::$_incompatible_addons[ $addon_name ],
+				$addon_settings['version']
+			)
+		) {
+			$incompatibility_message = sprintf(
+				esc_html__(
+					'%4$sIMPORTANT!%5$sThe Event Espresso "%1$s" addon is not compatible with this version of Event Espresso.%2$sPlease upgrade your "%1$s" addon to version %3$s or newer to resolve this issue.',
+					'event_espresso'
+				),
+				$addon_name,
+				'<br />',
+				EE_Register_Addon::$_incompatible_addons[ $addon_name ],
+				'<span style="font-weight: bold; color: #D54E21;">',
+				'</span><br />'
+			);
+		} elseif (
+			! self::_meets_min_core_version_requirement($addon_settings['min_core_version'], espresso_version())
+		) {
+			$incompatibility_message = sprintf(
+				esc_html__(
+					'%5$sIMPORTANT!%6$sThe Event Espresso "%1$s" addon requires Event Espresso Core version "%2$s" or higher in order to run.%4$sYour version of Event Espresso Core is currently at "%3$s". Please upgrade Event Espresso Core first and then re-activate "%1$s".',
+					'event_espresso'
+				),
+				$addon_name,
+				self::_effective_version($addon_settings['min_core_version']),
+				self::_effective_version(espresso_version()),
+				'<br />',
+				'<span style="font-weight: bold; color: #D54E21;">',
+				'</span><br />'
+			);
+		} elseif (version_compare($wp_version, $addon_settings['min_wp_version'], '<')) {
+			$incompatibility_message = sprintf(
+				esc_html__(
+					'%4$sIMPORTANT!%5$sThe Event Espresso "%1$s" addon requires WordPress version "%2$s" or greater.%3$sPlease update your version of WordPress to use the "%1$s" addon and to keep your site secure.',
+					'event_espresso'
+				),
+				$addon_name,
+				$addon_settings['min_wp_version'],
+				'<br />',
+				'<span style="font-weight: bold; color: #D54E21;">',
+				'</span><br />'
+			);
+		}
+		if (! empty($incompatibility_message)) {
+			// remove 'activate' from the REQUEST
+			// so WP doesn't erroneously tell the user the plugin activated fine when it didn't
+			/** @var RequestInterface $request */
+			$request = LoaderFactory::getLoader()->getShared(RequestInterface::class);
+			$request->unSetRequestParam('activate', true);
+			if (current_user_can('activate_plugins')) {
+				// show an error message indicating the plugin didn't activate properly
+				EE_Error::add_error($incompatibility_message, __FILE__, __FUNCTION__, __LINE__);
+			}
+			unset($_GET['activate'], $_REQUEST['activate']);
+			if (! function_exists('deactivate_plugins')) {
+				require_once ABSPATH . 'wp-admin/includes/plugin.php';
+			}
+			deactivate_plugins(plugin_basename($addon_settings['main_file_path']));
+			// BAIL FROM THE ADDON REGISTRATION PROCESS
+			return false;
+		}
+		// addon IS compatible
+		return true;
+	}
+
+
+	/**
+	 * register namespaces right away before any other files or classes get loaded, but AFTER the version checks
+	 *
+	 * @param array $addon_settings
+	 * @return void
+	 */
+	private static function _setup_namespaces(array $addon_settings)
+	{
+		//
+		if (
+			isset(
+				$addon_settings['namespace']['FQNS'],
+				$addon_settings['namespace']['DIR']
+			)
+		) {
+			EE_Psr4AutoloaderInit::psr4_loader()->addNamespace(
+				$addon_settings['namespace']['FQNS'],
+				$addon_settings['namespace']['DIR']
+			);
+		}
+	}
+
+
+	/**
+	 * @param string $addon_name
+	 * @param array  $addon_settings
+	 * @return bool
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	private static function _addon_activation(string $addon_name, array $addon_settings): bool
+	{
+		// this is an activation request
+		if (did_action('activate_plugin')) {
+			// to find if THIS is the addon that was activated, just check if we have already registered it or not
+			// (as the newly-activated addon wasn't around the first time addons were registered).
+			// Note: the presence of pue_options in the addon registration options will initialize the $_settings
+			// property for the add-on, but the add-on is only partially initialized.  Hence, the additional check.
+			if (
+				! isset(self::$_settings[ $addon_name ])
+				|| (isset(self::$_settings[ $addon_name ])
+					&& ! isset(self::$_settings[ $addon_name ]['class_name'])
+				)
+			) {
+				self::$_settings[ $addon_name ] = $addon_settings;
+				$addon                          = self::_load_and_init_addon_class($addon_name);
+				$addon->set_activation_indicator_option();
+				// dont bother setting up the rest of the addon.
+				// we know it was just activated and the request will end soon
+			}
+			return true;
+		}
+		// make sure addon settings are set correctly without overwriting anything existing
+		if (isset(self::$_settings[ $addon_name ])) {
+			self::$_settings[ $addon_name ] += $addon_settings;
+		} else {
+			self::$_settings[ $addon_name ] = $addon_settings;
+		}
+		return false;
+	}
+
+
+	/**
+	 * @param string $addon_name
+	 * @return void
+	 * @throws EE_Error
+	 */
+	private static function _setup_autoloaders(string $addon_name)
+	{
+		if (! empty(self::$_settings[ $addon_name ]['autoloader_paths'])) {
+			// setup autoloader for single file
+			EEH_Autoloader::instance()->register_autoloader(self::$_settings[ $addon_name ]['autoloader_paths']);
+		}
+		// setup autoloaders for folders
+		if (! empty(self::$_settings[ $addon_name ]['autoloader_folders'])) {
+			foreach ((array) self::$_settings[ $addon_name ]['autoloader_folders'] as $autoloader_folder) {
+				EEH_Autoloader::register_autoloaders_for_each_file_in_folder($autoloader_folder);
+			}
+		}
+	}
+
+
+	/**
+	 * register new models and extensions
+	 *
+	 * @param string $addon_name
+	 * @return void
+	 * @throws EE_Error
+	 */
+	private static function _register_models_and_extensions(string $addon_name)
+	{
+		// register new models
+		if (
+			! empty(self::$_settings[ $addon_name ]['model_paths'])
+			|| ! empty(self::$_settings[ $addon_name ]['class_paths'])
+		) {
+			EE_Register_Model::register(
+				$addon_name,
+				[
+					'model_paths' => self::$_settings[ $addon_name ]['model_paths'],
+					'class_paths' => self::$_settings[ $addon_name ]['class_paths'],
+				]
+			);
+		}
+		// register model extensions
+		if (
+			! empty(self::$_settings[ $addon_name ]['model_extension_paths'])
+			|| ! empty(self::$_settings[ $addon_name ]['class_extension_paths'])
+		) {
+			EE_Register_Model_Extensions::register(
+				$addon_name,
+				[
+					'model_extension_paths' => self::$_settings[ $addon_name ]['model_extension_paths'],
+					'class_extension_paths' => self::$_settings[ $addon_name ]['class_extension_paths'],
+				]
+			);
+		}
+	}
+
+
+	/**
+	 * @param string $addon_name
+	 * @return void
+	 * @throws EE_Error
+	 */
+	private static function _register_data_migration_scripts(string $addon_name)
+	{
+		// setup DMS
+		if (! empty(self::$_settings[ $addon_name ]['dms_paths'])) {
+			EE_Register_Data_Migration_Scripts::register(
+				$addon_name,
+				['dms_paths' => self::$_settings[ $addon_name ]['dms_paths']]
+			);
+		}
+	}
+
+
+	/**
+	 * @param string $addon_name
+	 * @return void
+	 * @throws EE_Error
+	 */
+	private static function _register_config(string $addon_name)
+	{
+		// if config_class is present let's register config.
+		if (! empty(self::$_settings[ $addon_name ]['config_class'])) {
+			EE_Register_Config::register(
+				self::$_settings[ $addon_name ]['config_class'],
+				[
+					'config_section' => self::$_settings[ $addon_name ]['config_section'],
+					'config_name'    => self::$_settings[ $addon_name ]['config_name'],
+				]
+			);
+		}
+	}
+
+
+	/**
+	 * @param string $addon_name
+	 * @return void
+	 * @throws EE_Error
+	 */
+	private static function _register_admin_pages(string $addon_name)
+	{
+		if (! empty(self::$_settings[ $addon_name ]['admin_path'])) {
+			EE_Register_Admin_Page::register(
+				$addon_name,
+				['page_path' => self::$_settings[ $addon_name ]['admin_path']]
+			);
+		}
+	}
+
+
+	/**
+	 * @param string $addon_name
+	 * @return void
+	 * @throws EE_Error
+	 */
+	private static function _register_modules(string $addon_name)
+	{
+		if (! empty(self::$_settings[ $addon_name ]['module_paths'])) {
+			EE_Register_Module::register(
+				$addon_name,
+				['module_paths' => self::$_settings[ $addon_name ]['module_paths']]
+			);
+		}
+	}
+
+
+	/**
+	 * @param string $addon_name
+	 * @return void
+	 * @throws EE_Error
+	 */
+	private static function _register_shortcodes(string $addon_name)
+	{
+		if (
+			! empty(self::$_settings[ $addon_name ]['shortcode_paths'])
+			|| ! empty(self::$_settings[ $addon_name ]['shortcode_fqcns'])
+		) {
+			EE_Register_Shortcode::register(
+				$addon_name,
+				[
+					'shortcode_paths' => self::$_settings[ $addon_name ]['shortcode_paths'] ?? [],
+					'shortcode_fqcns' => self::$_settings[ $addon_name ]['shortcode_fqcns'] ?? [],
+				]
+			);
+		}
+	}
+
+
+	/**
+	 * @param string $addon_name
+	 * @return void
+	 * @throws EE_Error
+	 */
+	private static function _register_widgets(string $addon_name)
+	{
+		if (! empty(self::$_settings[ $addon_name ]['widget_paths'])) {
+			EE_Register_Widget::register(
+				$addon_name,
+				['widget_paths' => self::$_settings[ $addon_name ]['widget_paths']]
+			);
+		}
+	}
+
+
+	/**
+	 * @param string $addon_name
+	 * @return void
+	 * @throws EE_Error
+	 */
+	private static function _register_capabilities(string $addon_name)
+	{
+		if (! empty(self::$_settings[ $addon_name ]['capabilities'])) {
+			EE_Register_Capabilities::register(
+				$addon_name,
+				[
+					'capabilities'    => self::$_settings[ $addon_name ]['capabilities'],
+					'capability_maps' => self::$_settings[ $addon_name ]['capability_maps'],
+				]
+			);
+		}
+	}
+
+
+	/**
+	 * @param string $addon_name
+	 * @return void
+	 */
+	private static function _register_message_types(string $addon_name)
+	{
+		if (! empty(self::$_settings[ $addon_name ]['message_types'])) {
+			add_action(
+				'EE_Brewing_Regular___messages_caf',
+				['EE_Register_Addon', 'register_message_types']
+			);
+		}
+	}
+
+
+	/**
+	 * @param string $addon_name
+	 * @return void
+	 * @throws EE_Error
+	 */
+	private static function _register_custom_post_types(string $addon_name)
+	{
+		if (
+			! empty(self::$_settings[ $addon_name ]['custom_post_types'])
+			|| ! empty(self::$_settings[ $addon_name ]['custom_taxonomies'])
+		) {
+			EE_Register_CPT::register(
+				$addon_name,
+				[
+					'cpts'          => self::$_settings[ $addon_name ]['custom_post_types'],
+					'cts'           => self::$_settings[ $addon_name ]['custom_taxonomies'],
+					'default_terms' => self::$_settings[ $addon_name ]['default_terms'],
+				]
+			);
+		}
+	}
+
+
+	/**
+	 * @param string $addon_name
+	 * @return void
+	 * @throws InvalidArgumentException
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidDataTypeException
+	 * @throws DomainException
+	 * @throws EE_Error
+	 */
+	private static function _register_payment_methods(string $addon_name)
+	{
+		if (! empty(self::$_settings[ $addon_name ]['payment_method_paths'])) {
+			EE_Register_Payment_Method::register(
+				$addon_name,
+				['payment_method_paths' => self::$_settings[ $addon_name ]['payment_method_paths']]
+			);
+		}
+	}
+
+
+	/**
+	 * @param string $addon_name
+	 * @return void
+	 * @throws InvalidArgumentException
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidDataTypeException
+	 * @throws DomainException
+	 */
+	private static function registerPrivacyPolicies(string $addon_name)
+	{
+		if (! empty(self::$_settings[ $addon_name ]['privacy_policies'])) {
+			EE_Register_Privacy_Policy::register(
+				$addon_name,
+				self::$_settings[ $addon_name ]['privacy_policies']
+			);
+		}
+	}
+
+
+	/**
+	 * @param string $addon_name
+	 * @return void
+	 */
+	private static function registerPersonalDataExporters(string $addon_name)
+	{
+		if (! empty(self::$_settings[ $addon_name ]['personal_data_exporters'])) {
+			EE_Register_Personal_Data_Eraser::register(
+				$addon_name,
+				self::$_settings[ $addon_name ]['personal_data_exporters']
+			);
+		}
+	}
+
+
+	/**
+	 * @param string $addon_name
+	 * @return void
+	 */
+	private static function registerPersonalDataErasers(string $addon_name)
+	{
+		if (! empty(self::$_settings[ $addon_name ]['personal_data_erasers'])) {
+			EE_Register_Personal_Data_Eraser::register(
+				$addon_name,
+				self::$_settings[ $addon_name ]['personal_data_erasers']
+			);
+		}
+	}
+
+
+	/**
+	 * Loads and instantiates the EE_Addon class and adds it onto the registry
+	 *
+	 * @param string $addon_name
+	 * @return EE_Addon
+	 * @throws InvalidArgumentException
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidDataTypeException
+	 */
+	private static function _load_and_init_addon_class(string $addon_name): EE_Addon
+	{
+		$addon = self::$loader->getShared(
+			self::$_settings[ $addon_name ]['class_name'],
+			['EE_Registry::create(addon)' => true]
+		);
+		if (! $addon instanceof EE_Addon) {
+			throw new DomainException(
+				sprintf(
+					esc_html__('The "%1$s" EE_Addon class failed to instantiate!', 'event_espresso'),
+					self::$_settings[ $addon_name ]['class_name']
+				)
+			);
+		}
+		// setter inject dep map if required
+		if ($addon->dependencyMap() === null) {
+			$addon->setDependencyMap(self::$loader->getShared('EE_Dependency_Map'));
+		}
+		// setter inject domain if required
+		EE_Register_Addon::injectAddonDomain($addon_name, $addon);
+
+		$addon->set_name($addon_name);
+		$addon->set_plugin_slug(self::$_settings[ $addon_name ]['plugin_slug']);
+		$addon->set_plugin_basename(self::$_settings[ $addon_name ]['plugin_basename']);
+		$addon->set_main_plugin_file(self::$_settings[ $addon_name ]['main_file_path']);
+		$addon->set_plugin_action_slug(self::$_settings[ $addon_name ]['plugin_action_slug']);
+		$addon->set_plugins_page_row(self::$_settings[ $addon_name ]['plugins_page_row']);
+		$addon->set_version(self::$_settings[ $addon_name ]['version']);
+		$addon->set_min_core_version(self::_effective_version(self::$_settings[ $addon_name ]['min_core_version']));
+		$addon->set_config_section(self::$_settings[ $addon_name ]['config_section']);
+		$addon->set_config_class(self::$_settings[ $addon_name ]['config_class']);
+		$addon->set_config_name(self::$_settings[ $addon_name ]['config_name']);
+		do_action(
+			'AHEE__EE_Register_Addon___load_and_init_addon_class',
+			$addon,
+			$addon_name,
+			self::$_settings
+		);
+		// unfortunately this can't be hooked in upon construction,
+		// because we don't have the plugin's mainfile path upon construction.
+		register_deactivation_hook($addon->get_main_plugin_file(), [$addon, 'deactivation']);
+		// call any additional admin_callback functions during load_admin_controller hook
+		if (! empty(self::$_settings[ $addon_name ]['admin_callback'])) {
+			add_action(
+				'AHEE__EE_System__load_controllers__load_admin_controllers',
+				[$addon, self::$_settings[ $addon_name ]['admin_callback']]
+			);
+		}
+		return $addon;
+	}
+
+
+	/**
+	 * @param string   $addon_name
+	 * @param EE_Addon $addon
+	 * @since   4.10.13.p
+	 */
+	private static function injectAddonDomain(string $addon_name, EE_Addon $addon)
+	{
+		if ($addon instanceof RequiresDomainInterface && $addon->domain() === null) {
+			// using supplied Domain object
+			$domain = self::$_settings[ $addon_name ]['domain'] instanceof DomainInterface
+				? self::$_settings[ $addon_name ]['domain']
+				: null;
+			// or construct one using Domain FQCN
+			if ($domain === null && self::$_settings[ $addon_name ]['domain_fqcn'] !== '') {
+				$domain = self::$loader->getShared(
+					self::$_settings[ $addon_name ]['domain_fqcn'],
+					[
+						new EventEspresso\core\domain\values\FilePath(
+							self::$_settings[ $addon_name ]['main_file_path']
+						),
+						EventEspresso\core\domain\values\Version::fromString(
+							self::$_settings[ $addon_name ]['version']
+						),
+					]
+				);
+			}
+			if ($domain instanceof DomainInterface) {
+				$addon->setDomain($domain);
+			}
+		}
+	}
+
+
+	/**
+	 * @return void
+	 * @deprecated 5.0.0.p
+	 */
+	public static function load_pue_update()
+	{
+		RegisterAddonPUE::loadPueUpdate();
+	}
+
+
+	/**
+	 * Callback for EE_Brewing_Regular__messages_caf hook used to register message types.
+	 *
+	 * @return void
+	 * @throws EE_Error
+	 * @since 4.4.0
+	 */
+	public static function register_message_types()
+	{
+		foreach (self::$_settings as $settings) {
+			if (! empty($settings['message_types'])) {
+				foreach ((array) $settings['message_types'] as $message_type => $message_type_settings) {
+					EE_Register_Message_Type::register($message_type, $message_type_settings);
+				}
+			}
+		}
+	}
+
+
+	/**
+	 * This deregisters an addon that was previously registered with a specific addon_name.
+	 *
+	 * @param string $addon_name the name for the addon that was previously registered
+	 * @throws DomainException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @since    4.3.0
+	 */
+	public static function deregister(string $addon_name = '')
+	{
+		if (isset(self::$_settings[ $addon_name ]['class_name'])) {
+			try {
+				do_action('AHEE__EE_Register_Addon__deregister__before', $addon_name);
+				$class_name = self::$_settings[ $addon_name ]['class_name'];
+				if (! empty(self::$_settings[ $addon_name ]['dms_paths'])) {
+					// setup DMS
+					EE_Register_Data_Migration_Scripts::deregister($addon_name);
+				}
+				if (! empty(self::$_settings[ $addon_name ]['admin_path'])) {
+					// register admin page
+					EE_Register_Admin_Page::deregister($addon_name);
+				}
+				if (! empty(self::$_settings[ $addon_name ]['module_paths'])) {
+					// add to list of modules to be registered
+					EE_Register_Module::deregister($addon_name);
+				}
+				if (
+					! empty(self::$_settings[ $addon_name ]['shortcode_paths'])
+					|| ! empty(self::$_settings[ $addon_name ]['shortcode_fqcns'])
+				) {
+					// add to list of shortcodes to be registered
+					EE_Register_Shortcode::deregister($addon_name);
+				}
+				if (! empty(self::$_settings[ $addon_name ]['config_class'])) {
+					// if config_class present let's register config.
+					EE_Register_Config::deregister(self::$_settings[ $addon_name ]['config_class']);
+				}
+				if (! empty(self::$_settings[ $addon_name ]['widget_paths'])) {
+					// add to list of widgets to be registered
+					EE_Register_Widget::deregister($addon_name);
+				}
+				if (
+					! empty(self::$_settings[ $addon_name ]['model_paths'])
+					|| ! empty(self::$_settings[ $addon_name ]['class_paths'])
+				) {
+					// add to list of shortcodes to be registered
+					EE_Register_Model::deregister($addon_name);
+				}
+				if (
+					! empty(self::$_settings[ $addon_name ]['model_extension_paths'])
+					|| ! empty(self::$_settings[ $addon_name ]['class_extension_paths'])
+				) {
+					// add to list of shortcodes to be registered
+					EE_Register_Model_Extensions::deregister($addon_name);
+				}
+				if (! empty(self::$_settings[ $addon_name ]['message_types'])) {
+					foreach ((array) self::$_settings[ $addon_name ]['message_types'] as $message_type => $message_type_settings) {
+						EE_Register_Message_Type::deregister($message_type);
+					}
+				}
+				// deregister capabilities for addon
+				if (
+					! empty(self::$_settings[ $addon_name ]['capabilities'])
+					|| ! empty(self::$_settings[ $addon_name ]['capability_maps'])
+				) {
+					EE_Register_Capabilities::deregister($addon_name);
+				}
+				// deregister custom_post_types for addon
+				if (! empty(self::$_settings[ $addon_name ]['custom_post_types'])) {
+					EE_Register_CPT::deregister($addon_name);
+				}
+				if (! empty(self::$_settings[ $addon_name ]['payment_method_paths'])) {
+					EE_Register_Payment_Method::deregister($addon_name);
+				}
+				$addon = EE_Registry::instance()->getAddon($class_name);
+				if ($addon instanceof EE_Addon) {
+					remove_action(
+						'deactivate_' . $addon->get_main_plugin_file_basename(),
+						[$addon, 'deactivation']
+					);
+					remove_action(
+						'AHEE__EE_System__perform_activations_upgrades_and_migrations',
+						[$addon, 'initialize_db_if_no_migrations_required']
+					);
+					// remove `after_registration` call
+					remove_action(
+						'AHEE__EE_System__load_espresso_addons__complete',
+						[$addon, 'after_registration'],
+						999
+					);
+				}
+				EE_Registry::instance()->removeAddon($class_name);
+				LoaderFactory::getLoader()->remove($class_name);
+			} catch (OutOfBoundsException $addon_not_yet_registered_exception) {
+				// the add-on was not yet registered in the registry,
+				// so RegistryContainer::__get() throws this exception.
+				// also no need to worry about this or log it,
+				// it's ok to deregister an add-on before its registered in the registry
+			} catch (Exception $e) {
+				new ExceptionLogger($e);
+			}
+			unset(self::$_settings[ $addon_name ]);
+			do_action('AHEE__EE_Register_Addon__deregister__after', $addon_name);
+		}
+	}
 }

core/EE_System.core.php

Indentation +1230 added lines, -1230 removed lines

@@ -24,1234 +24,1234 @@
  */
 final class EE_System implements ResettableInterface
 {
-    /**
-     * indicates this is a 'normal' request. Ie, not activation, nor upgrade, nor activation.
-     * So examples of this would be a normal GET request on the frontend or backend, or a POST, etc
-     */
-    const req_type_normal = 0;
-
-    /**
-     * Indicates this is a brand new installation of EE so we should install
-     * tables and default data etc
-     */
-    const req_type_new_activation = 1;
-
-    /**
-     * we've detected that EE has been reactivated (or EE was activated during maintenance mode,
-     * and we just exited maintenance mode). We MUST check the database is setup properly
-     * and that default data is setup too
-     */
-    const req_type_reactivation = 2;
-
-    /**
-     * indicates that EE has been upgraded since its previous request.
-     * We may have data migration scripts to call and will want to trigger maintenance mode
-     */
-    const req_type_upgrade = 3;
-
-    /**
-     * TODO  will detect that EE has been DOWNGRADED. We probably don't want to run in this case...
-     */
-    const req_type_downgrade = 4;
-
-    /**
-     * @deprecated since version 4.6.0.dev.006
-     * Now whenever a new_activation is detected the request type is still just
-     * new_activation (same for reactivation, upgrade, downgrade etc), but if we're in maintenance mode
-     * EE_System::initialize_db_if_no_migrations_required and EE_Addon::initialize_db_if_no_migrations_required
-     * will instead enqueue that EE plugin's db initialization for when we're taken out of maintenance mode.
-     * (Specifically, when the migration manager indicates migrations are finished
-     * EE_Data_Migration_Manager::initialize_db_for_enqueued_ee_plugins() will be called)
-     */
-    const req_type_activation_but_not_installed = 5;
-
-    /**
-     * option prefix for recording the activation history (like core's "espresso_db_update") of addons
-     */
-    const addon_activation_history_option_prefix = 'ee_addon_activation_history_';
-
-    /**
-     * @var AddonManager $addon_manager
-     */
-    private $addon_manager;
-
-    /**
-     * @var EE_System $_instance
-     */
-    private static $_instance;
-
-    /**
-     * @var EE_Registry $registry
-     */
-    private $registry;
-
-    /**
-     * @var LoaderInterface $loader
-     */
-    private $loader;
-
-    /**
-     * @var EE_Capabilities $capabilities
-     */
-    private $capabilities;
-
-    /**
-     * @var EE_Maintenance_Mode $maintenance_mode
-     */
-    private $maintenance_mode;
-
-    /**
-     * @var RequestInterface $request
-     */
-    private $request;
-
-    /**
-     * Stores which type of request this is, options being one of the constants on EE_System starting with req_type_*.
-     * It can be a brand-new activation, a reactivation, an upgrade, a downgrade, or a normal request.
-     *
-     * @var int $_req_type
-     */
-    private $_req_type;
-
-    /**
-     * Whether or not there was a non-micro version change in EE core version during this request
-     *
-     * @var boolean $_major_version_change
-     */
-    private $_major_version_change = false;
-
-    /**
-     * @var Router $router
-     */
-    private $router;
-
-    /**
-     * @param EventEspresso\core\domain\services\custom_post_types\RegisterCustomPostTypes
-     */
-    private $register_custom_post_types;
-
-    /**
-     * @param EventEspresso\core\domain\services\custom_post_types\RegisterCustomTaxonomies
-     */
-    private $register_custom_taxonomies;
-
-    /**
-     * @param EventEspresso\core\domain\services\custom_post_types\RegisterCustomTaxonomyTerms
-     */
-    private $register_custom_taxonomy_terms;
-
-    /**
-     * @singleton method used to instantiate class object
-     * @param LoaderInterface|null     $loader
-     * @param EE_Maintenance_Mode|null $maintenance_mode
-     * @param EE_Registry|null         $registry
-     * @param RequestInterface|null    $request
-     * @param Router|null              $router
-     * @return EE_System
-     */
-    public static function instance(
-        LoaderInterface $loader = null,
-        EE_Maintenance_Mode $maintenance_mode = null,
-        EE_Registry $registry = null,
-        RequestInterface $request = null,
-        Router $router = null
-    ): EE_System {
-        // check if class object is instantiated
-        if (! self::$_instance instanceof EE_System) {
-            self::$_instance = new self($loader, $maintenance_mode, $registry, $request, $router);
-        }
-        return self::$_instance;
-    }
-
-
-    /**
-     * resets the instance and returns it
-     *
-     * @return EE_System
-     */
-    public static function reset(): EE_System
-    {
-        self::$_instance->_req_type = null;
-        // make sure none of the old hooks are left hanging around
-        remove_all_actions('AHEE__EE_System__perform_activations_upgrades_and_migrations');
-        // we need to reset the migration manager in order for it to detect DMSs properly
-        EE_Data_Migration_Manager::reset();
-        self::instance()->detect_activations_or_upgrades();
-        self::instance()->perform_activations_upgrades_and_migrations();
-        return self::instance();
-    }
-
-
-    /**
-     * sets hooks for running rest of system
-     * provides "AHEE__EE_System__construct__complete" hook for EE Addons to use as their starting point
-     * starting EE Addons from any other point may lead to problems
-     *
-     * @param LoaderInterface     $loader
-     * @param EE_Maintenance_Mode $maintenance_mode
-     * @param EE_Registry         $registry
-     * @param RequestInterface    $request
-     * @param Router              $router
-     */
-    private function __construct(
-        LoaderInterface $loader,
-        EE_Maintenance_Mode $maintenance_mode,
-        EE_Registry $registry,
-        RequestInterface $request,
-        Router $router
-    ) {
-        $this->registry         = $registry;
-        $this->loader           = $loader;
-        $this->request          = $request;
-        $this->router           = $router;
-        $this->maintenance_mode = $maintenance_mode;
-        do_action('AHEE__EE_System__construct__begin', $this);
-        add_action(
-            'AHEE__EE_Bootstrap__load_espresso_addons',
-            [$this, 'loadCapabilities'],
-            5
-        );
-        add_action(
-            'AHEE__EE_Bootstrap__load_espresso_addons',
-            [$this, 'loadCommandBus'],
-            7
-        );
-        add_action(
-            'AHEE__EE_Bootstrap__load_espresso_addons',
-            [$this, 'loadPluginApi'],
-            9
-        );
-        // give caff stuff a chance to play during the activation process too.
-        add_action(
-            'AHEE__EE_Bootstrap__load_espresso_addons',
-            [$this, 'brewCaffeinated'],
-            9
-        );
-        // allow addons to load first so that they can register autoloaders, set hooks for running DMS's, etc
-        add_action(
-            'AHEE__EE_Bootstrap__load_espresso_addons',
-            [$this, 'load_espresso_addons']
-        );
-        // when an ee addon is activated, we want to call the core hook(s) again
-        // because the newly-activated addon didn't get a chance to run at all
-        add_action('activate_plugin', [$this, 'load_espresso_addons'], 1);
-        // detect whether install or upgrade
-        add_action(
-            'AHEE__EE_Bootstrap__detect_activations_or_upgrades',
-            [$this, 'detect_activations_or_upgrades'],
-            3
-        );
-        // load EE_Config, EE_Textdomain, etc
-        add_action(
-            'AHEE__EE_Bootstrap__load_core_configuration',
-            [$this, 'load_core_configuration'],
-            5
-        );
-        // load specifications for matching routes to current request
-        add_action(
-            'AHEE__EE_Bootstrap__load_core_configuration',
-            [$this, 'loadRouteMatchSpecifications']
-        );
-        // load specifications for custom post types
-        add_action(
-            'AHEE__EE_Bootstrap__load_core_configuration',
-            array($this, 'loadCustomPostTypes')
-        );
-        // load specifications for custom post types
-        add_action(
-            'AHEE__EE_Bootstrap__load_core_configuration',
-            array($this, 'loadCustomPostTypes')
-        );
-        // load EE_Config, EE_Textdomain, etc
-        add_action(
-            'AHEE__EE_Bootstrap__register_shortcodes_modules_and_widgets',
-            [$this, 'register_shortcodes_modules_and_widgets'],
-            7
-        );
-        // you wanna get going? I wanna get going... let's get going!
-        add_action(
-            'AHEE__EE_Bootstrap__brew_espresso',
-            [$this, 'brew_espresso'],
-            9
-        );
-        // other housekeeping
-        // exclude EE critical pages from wp_list_pages
-        add_filter(
-            'wp_list_pages_excludes',
-            [$this, 'remove_pages_from_wp_list_pages'],
-            10
-        );
-        // ALL EE Addons should use the following hook point to attach their initial setup too
-        // it's extremely important for EE Addons to register any class autoloaders so that they can be available when the EE_Config loads
-        do_action('AHEE__EE_System__construct__complete', $this);
-    }
-
-
-    /**
-     * load and setup EE_Capabilities
-     *
-     * @return void
-     */
-    public function loadCapabilities()
-    {
-        $this->capabilities = $this->loader->getShared('EE_Capabilities');
-        add_action(
-            'AHEE__EE_Capabilities__init_caps__before_initialization',
-            function () {
-                LoaderFactory::getLoader()->getShared('EventEspresso\PaymentMethods\Manager');
-                LoaderFactory::getLoader()->getShared('EE_Payment_Method_Manager');
-            }
-        );
-    }
-
-
-    /**
-     * create and cache the CommandBus, and also add middleware
-     * The CapChecker middleware requires the use of EE_Capabilities
-     * which is why we need to load the CommandBus after Caps are set up
-     * CommandBus middleware operate FIFO - First In First Out
-     * so LocateMovedCommands will run first in order to return any new commands
-     *
-     * @return void
-     */
-    public function loadCommandBus()
-    {
-        $this->loader->getShared(
-            'CommandBusInterface',
-            [
-                null,
-                apply_filters(
-                    'FHEE__EE_Load_Espresso_Core__handle_request__CommandBus_middleware',
-                    [
-                        $this->loader->getShared('EventEspresso\core\services\commands\middleware\LocateMovedCommands'),
-                        $this->loader->getShared('EventEspresso\core\services\commands\middleware\CapChecker'),
-                        $this->loader->getShared('EventEspresso\core\services\commands\middleware\AddActionHook'),
-                    ]
-                ),
-            ]
-        );
-    }
-
-
-    /**
-     * @return void
-     * @throws Exception
-     */
-    public function loadPluginApi()
-    {
-        $this->addon_manager = $this->loader->getShared(AddonManager::class);
-        $this->addon_manager->initialize();
-        $this->loader->getShared('EE_Request_Handler');
-    }
-
-
-    /**
-     * The purpose of this method is to simply check for a file named "caffeinated/brewing_regular.php" for any hooks
-     * that need to be setup before our EE_System launches.
-     *
-     * @return void
-     * @throws DomainException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws InvalidClassException
-     * @throws InvalidFilePathException
-     * @throws EE_Error
-     */
-    public function brewCaffeinated()
-    {
-        static $brew;
-        /** @var Domain $domain */
-        $domain = DomainFactory::getEventEspressoCoreDomain();
-        if ($domain->isCaffeinated() && ! $brew instanceof EE_Brewing_Regular) {
-            require_once EE_CAFF_PATH . 'brewing_regular.php';
-            /** @var EE_Brewing_Regular $brew */
-            $brew = LoaderFactory::getLoader()->getShared(EE_Brewing_Regular::class);
-            $brew->initializePUE();
-            add_action(
-                'AHEE__EE_System__load_core_configuration__begin',
-                [$brew, 'caffeinated']
-            );
-        }
-    }
-
-
-    /**
-     * load_espresso_addons
-     * allow addons to load first so that they can set hooks for running DMS's, etc
-     * this is hooked into both:
-     *    'AHEE__EE_Bootstrap__load_core_configuration'
-     *        which runs during the WP 'plugins_loaded' action at priority 5
-     *    and the WP 'activate_plugin' hook point
-     *
-     * @return void
-     * @throws Exception
-     */
-    public function load_espresso_addons()
-    {
-        // looking for hooks? they've been moved into the AddonManager to maintain compatibility
-        $this->addon_manager->loadAddons();
-    }
-
-
-    /**
-     * detect_activations_or_upgrades
-     * Checks for activation or upgrade of core first;
-     * then also checks if any registered addons have been activated or upgraded
-     * This is hooked into 'AHEE__EE_Bootstrap__detect_activations_or_upgrades'
-     * which runs during the WP 'plugins_loaded' action at priority 3
-     *
-     * @access public
-     * @return void
-     */
-    public function detect_activations_or_upgrades()
-    {
-        // first off: let's make sure to handle core
-        $this->detect_if_activation_or_upgrade();
-        foreach ($this->registry->addons as $addon) {
-            if ($addon instanceof EE_Addon) {
-                // detect teh request type for that addon
-                $addon->detect_req_type();
-            }
-        }
-    }
-
-
-    /**
-     * detect_if_activation_or_upgrade
-     * Takes care of detecting whether this is a brand new install or code upgrade,
-     * and either setting up the DB or setting up maintenance mode etc.
-     *
-     * @access public
-     * @return void
-     */
-    public function detect_if_activation_or_upgrade()
-    {
-        do_action('AHEE__EE_System___detect_if_activation_or_upgrade__begin');
-        // check if db has been updated, or if its a brand-new installation
-        $espresso_db_update = $this->fix_espresso_db_upgrade_option();
-        $request_type       = $this->detect_req_type($espresso_db_update);
-        // EEH_Debug_Tools::printr( $request_type, '$request_type', __FILE__, __LINE__ );
-        switch ($request_type) {
-            case EE_System::req_type_new_activation:
-                do_action('AHEE__EE_System__detect_if_activation_or_upgrade__new_activation');
-                $this->_handle_core_version_change($espresso_db_update);
-                break;
-            case EE_System::req_type_reactivation:
-                do_action('AHEE__EE_System__detect_if_activation_or_upgrade__reactivation');
-                $this->_handle_core_version_change($espresso_db_update);
-                break;
-            case EE_System::req_type_upgrade:
-                do_action('AHEE__EE_System__detect_if_activation_or_upgrade__upgrade');
-                // migrations may be required now that we've upgraded
-                $this->maintenance_mode->set_maintenance_mode_if_db_old();
-                $this->_handle_core_version_change($espresso_db_update);
-                break;
-            case EE_System::req_type_downgrade:
-                do_action('AHEE__EE_System__detect_if_activation_or_upgrade__downgrade');
-                // its possible migrations are no longer required
-                $this->maintenance_mode->set_maintenance_mode_if_db_old();
-                $this->_handle_core_version_change($espresso_db_update);
-                break;
-            case EE_System::req_type_normal:
-            default:
-                break;
-        }
-        do_action('AHEE__EE_System__detect_if_activation_or_upgrade__complete');
-    }
-
-
-    /**
-     * Updates the list of installed versions and sets hooks for
-     * initializing the database later during the request
-     *
-     * @param array $espresso_db_update
-     */
-    private function _handle_core_version_change(array $espresso_db_update)
-    {
-        $this->update_list_of_installed_versions($espresso_db_update);
-        // get ready to verify the DB is ok (provided we aren't in maintenance mode, of course)
-        add_action(
-            'AHEE__EE_System__perform_activations_upgrades_and_migrations',
-            [$this, 'initialize_db_if_no_migrations_required']
-        );
-    }
-
-
-    /**
-     * standardizes the wp option 'espresso_db_upgrade' which actually stores
-     * information about what versions of EE have been installed and activated,
-     * NOT necessarily the state of the database
-     *
-     * @param mixed $espresso_db_update           the value of the WordPress option.
-     *                                            If not supplied, fetches it from the options table
-     * @return array the correct value of 'espresso_db_upgrade', after saving it, if it needed correction
-     */
-    private function fix_espresso_db_upgrade_option($espresso_db_update = null): array
-    {
-        do_action('FHEE__EE_System__manage_fix_espresso_db_upgrade_option__begin', $espresso_db_update);
-        if (! $espresso_db_update) {
-            $espresso_db_update = get_option('espresso_db_update');
-        }
-        // check that option is an array
-        if (! is_array($espresso_db_update)) {
-            // if option is FALSE, then it never existed
-            if ($espresso_db_update === false) {
-                // make $espresso_db_update an array and save option with autoload OFF
-                $espresso_db_update = [];
-                add_option('espresso_db_update', $espresso_db_update, '', 'no');
-            } else {
-                // option is NOT FALSE but also is NOT an array, so make it an array and save it
-                $espresso_db_update = [$espresso_db_update => []];
-                update_option('espresso_db_update', $espresso_db_update);
-            }
-        } else {
-            $corrected_db_update = [];
-            // if IS an array, but is it an array where KEYS are version numbers, and values are arrays?
-            foreach ($espresso_db_update as $should_be_version_string => $should_be_array) {
-                if (is_int($should_be_version_string) && ! is_array($should_be_array)) {
-                    // the key is an int, and the value IS NOT an array
-                    // so it must be numerically-indexed, where values are versions installed...
-                    // fix it!
-                    $version_string                         = $should_be_array;
-                    $corrected_db_update[ $version_string ] = ['unknown-date'];
-                } else {
-                    // ok it checks out
-                    $corrected_db_update[ $should_be_version_string ] = $should_be_array;
-                }
-            }
-            $espresso_db_update = $corrected_db_update;
-            update_option('espresso_db_update', $espresso_db_update);
-        }
-        do_action('FHEE__EE_System__manage_fix_espresso_db_upgrade_option__complete', $espresso_db_update);
-        return ! empty($espresso_db_update) ? $espresso_db_update : [];
-    }
-
-
-    /**
-     * Does the traditional work of setting up the plugin's database and adding default data.
-     * If migration script/process did not exist, this is what would happen on every activation/reactivation/upgrade.
-     * NOTE: if we're in maintenance mode (which would be the case if we detect there are data
-     * migration scripts that need to be run and a version change happens), enqueues core for database initialization,
-     * so that it will be done when migrations are finished
-     *
-     * @param boolean $initialize_addons_too if true, we double-check addons' database tables etc too;
-     * @param boolean $verify_schema         if true will re-check the database tables have the correct schema.
-     *                                       This is a resource-intensive job
-     *                                       so we prefer to only do it when necessary
-     * @return void
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    public function initialize_db_if_no_migrations_required($initialize_addons_too = false, $verify_schema = true)
-    {
-        $request_type = $this->detect_req_type();
-        // only initialize system if we're not in maintenance mode.
-        if ($this->maintenance_mode->level() !== EE_Maintenance_Mode::level_2_complete_maintenance) {
-            /** @var EventEspresso\core\domain\services\custom_post_types\RewriteRules $rewrite_rules */
-            $rewrite_rules = $this->loader->getShared(
-                'EventEspresso\core\domain\services\custom_post_types\RewriteRules'
-            );
-            $rewrite_rules->flush();
-            if ($verify_schema) {
-                EEH_Activation::initialize_db_and_folders();
-            }
-            EEH_Activation::initialize_db_content();
-            EEH_Activation::system_initialization();
-            if ($initialize_addons_too) {
-                $this->initialize_addons();
-            }
-        } else {
-            EE_Data_Migration_Manager::instance()->enqueue_db_initialization_for('Core');
-        }
-        if (
-            $request_type === EE_System::req_type_new_activation
-            || $request_type === EE_System::req_type_reactivation
-            || (
-                $request_type === EE_System::req_type_upgrade
-                && $this->is_major_version_change()
-            )
-        ) {
-            add_action('AHEE__EE_System__initialize_last', [$this, 'redirect_to_about_ee'], 9);
-        }
-    }
-
-
-    /**
-     * Initializes the db for all registered addons
-     *
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    public function initialize_addons()
-    {
-        // foreach registered addon, make sure its db is up-to-date too
-        foreach ($this->registry->addons as $addon) {
-            if ($addon instanceof EE_Addon) {
-                $addon->initialize_db_if_no_migrations_required();
-            }
-        }
-    }
-
-
-    /**
-     * Adds the current code version to the saved wp option which stores a list of all ee versions ever installed.
-     *
-     * @param array  $version_history
-     * @param string $current_version_to_add version to be added to the version history
-     * @return    boolean success as to whether or not this option was changed
-     */
-    public function update_list_of_installed_versions($version_history = null, $current_version_to_add = null): bool
-    {
-        if (! $version_history) {
-            $version_history = $this->fix_espresso_db_upgrade_option($version_history);
-        }
-        if ($current_version_to_add === null) {
-            $current_version_to_add = espresso_version();
-        }
-        $version_history[ $current_version_to_add ][] = date('Y-m-d H:i:s', time());
-        // re-save
-        return update_option('espresso_db_update', $version_history);
-    }
-
-
-    /**
-     * Detects if the current version indicated in the has existed in the list of
-     * previously-installed versions of EE (espresso_db_update). Does NOT modify it (ie, no side-effect)
-     *
-     * @param array $espresso_db_update array from the wp option stored under the name 'espresso_db_update'.
-     *                                  If not supplied, fetches it from the options table.
-     *                                  Also, caches its result so later parts of the code can also know whether
-     *                                  there's been an update or not. This way we can add the current version to
-     *                                  espresso_db_update, but still know if this is a new install or not
-     * @return int one of the constants on EE_System::req_type_
-     */
-    public function detect_req_type($espresso_db_update = null): int
-    {
-        if ($this->_req_type === null) {
-            $espresso_db_update          = ! empty($espresso_db_update)
-                ? $espresso_db_update
-                : $this->fix_espresso_db_upgrade_option();
-            $this->_req_type             = EE_System::detect_req_type_given_activation_history(
-                $espresso_db_update,
-                'ee_espresso_activation',
-                espresso_version()
-            );
-            $this->_major_version_change = $this->_detect_major_version_change($espresso_db_update);
-            $this->request->setIsActivation($this->_req_type !== EE_System::req_type_normal);
-        }
-        return $this->_req_type;
-    }
-
-
-    /**
-     * Returns whether or not there was a non-micro version change (ie, change in either
-     * the first or second number in the version. Eg 4.9.0.rc.001 to 4.10.0.rc.000,
-     * but not 4.9.0.rc.0001 to 4.9.1.rc.0001
-     *
-     * @param $activation_history
-     * @return bool
-     */
-    private function _detect_major_version_change($activation_history): bool
-    {
-        $previous_version       = EE_System::getMostRecentlyActiveVersion($activation_history);
-        $previous_version_parts = explode('.', $previous_version);
-        $current_version_parts  = explode('.', espresso_version());
-        return isset(
-            $previous_version_parts[0],
-            $previous_version_parts[1],
-            $current_version_parts[0],
-            $current_version_parts[1]
-        ) && (
-            $previous_version_parts[0] !== $current_version_parts[0]
-            || $previous_version_parts[1] !== $current_version_parts[1]
-        );
-    }
-
-
-    /**
-     * Returns true if either the major or minor version of EE changed during this request.
-     * Eg 4.9.0.rc.001 to 4.10.0.rc.000, but not 4.9.0.rc.0001 to 4.9.1.rc.0001
-     *
-     * @return bool
-     */
-    public function is_major_version_change(): bool
-    {
-        return $this->_major_version_change;
-    }
-
-
-    /**
-     * Determines the request type for any ee addon, given three piece of info: the current array of activation
-     * histories (for core that' 'espresso_db_update' wp option); the name of the WordPress option which is temporarily
-     * set upon activation of the plugin (for core it's 'ee_espresso_activation'); and the version that this plugin was
-     * just activated to (for core that will always be espresso_version())
-     *
-     * @param array|null $activation_history             the option's value which stores the activation history for
-     *                                                 this
-     *                                                 ee plugin. for core that's 'espresso_db_update'
-     * @param string $activation_indicator_option_name the name of the WordPress option that is temporarily set to
-     *                                                 indicate that this plugin was just activated
-     * @param string $current_version                  the version that was just upgraded to (for core that will be
-     *                                                 espresso_version())
-     * @return int one of the constants on EE_System::req_type_
-     */
-    public static function detect_req_type_given_activation_history(
-        array $activation_history,
-        string $activation_indicator_option_name,
-        string $current_version
-    ): int {
-        $version_change = self::compareVersionWithPrevious($activation_history, $current_version);
-        $is_activation  = get_option($activation_indicator_option_name, false);
-        $req_type       = self::getRequestType($activation_history, $version_change, $is_activation);
-        if ($is_activation) {
-            // cleanup in aisle 6
-            delete_option($activation_indicator_option_name);
-        }
-        return $req_type;
-    }
-
-
-    /**
-     * @param array  $activation_history
-     * @param int    $version_change
-     * @param bool   $is_activation
-     * @return int
-     * @since 5.0.0.p
-     */
-    private static function getRequestType(array $activation_history, int $version_change, bool $is_activation): int
-    {
-        // if no previous activation history exists, then this is a brand new install
-        if (empty($activation_history)) {
-            return EE_System::req_type_new_activation;
-        }
-        // current version is higher than previous version, so it's an upgrade
-        if ($version_change === 1) {
-            return EE_System::req_type_upgrade;
-        }
-        // current version is lower than previous version, so it's a downgrade
-        if ($version_change === -1) {
-            return EE_System::req_type_downgrade;
-        }
-        // version hasn't changed since last version so check if the activation indicator is set
-        // to determine if it's a reactivation, or just a normal request
-        return $is_activation
-            ? EE_System::req_type_reactivation
-            : EE_System::req_type_normal;
-    }
-
-
-    /**
-     * Detects if the $version_to_upgrade_to is higher than the most recent version in
-     * the $activation_history_for_addon
-     *
-     * @param array  $activation_history    array where keys are versions,
-     *                                      values are arrays of times activated (sometimes 'unknown-date')
-     * @param string $current_version
-     * @return int results of version_compare( $version_to_upgrade_to, $most_recently_active_version ).
-     *                                      -1 if $version_to_upgrade_to is LOWER (downgrade);
-     *                                      0 if $version_to_upgrade_to MATCHES (reactivation or normal request);
-     *                                      1 if $version_to_upgrade_to is HIGHER (upgrade) ;
-     */
-    private static function compareVersionWithPrevious(array $activation_history, string $current_version): int
-    {
-        // find the most recently-activated version
-        $most_recently_active_version = EE_System::getMostRecentlyActiveVersion($activation_history);
-        return version_compare($current_version, $most_recently_active_version);
-    }
-
-
-    /**
-     * Gets the most recently active version listed in the activation history,
-     * and if none are found (ie, it's a brand new install) returns '0.0.0.dev.000'.
-     *
-     * @param array $activation_history  (keys are versions, values are arrays of times activated,
-     *                                   sometimes containing 'unknown-date'
-     * @return string
-     */
-    private static function getMostRecentlyActiveVersion(array $activation_history): string
-    {
-        $most_recent_activation_date  = '1970-01-01 00:00:00';
-        $most_recently_active_version = '0.0.0.dev.000';
-        if (is_array($activation_history)) {
-            foreach ($activation_history as $version => $activation_dates) {
-                // check there is a record of when this version was activated.
-                // Otherwise, mark it as unknown
-                if (! $activation_dates) {
-                    $activation_dates = ['unknown-date'];
-                }
-                $activation_dates = is_string($activation_dates) ? [$activation_dates] : $activation_dates;
-                foreach ($activation_dates as $activation_date) {
-                    if ($activation_date !== 'unknown-date' && $activation_date > $most_recent_activation_date) {
-                        $most_recently_active_version = $version;
-                        $most_recent_activation_date  = $activation_date;
-                    }
-                }
-            }
-        }
-        return $most_recently_active_version;
-    }
-
-
-    /**
-     * This redirects to the about EE page after activation
-     *
-     * @return void
-     */
-    public function redirect_to_about_ee()
-    {
-        $notices = EE_Error::get_notices(false);
-        // if current user is an admin and it's not an ajax or rest request
-        if (
-            ! isset($notices['errors'])
-            && $this->request->isAdmin()
-            && apply_filters(
-                'FHEE__EE_System__redirect_to_about_ee__do_redirect',
-                $this->capabilities->current_user_can('manage_options', 'espresso_about_default')
-            )
-        ) {
-            $query_params = ['page' => 'espresso_about'];
-            if (EE_System::instance()->detect_req_type() === EE_System::req_type_new_activation) {
-                $query_params['new_activation'] = true;
-            }
-            if (EE_System::instance()->detect_req_type() === EE_System::req_type_reactivation) {
-                $query_params['reactivation'] = true;
-            }
-            $url = add_query_arg($query_params, admin_url('admin.php'));
-            EEH_URL::safeRedirectAndExit($url);
-        }
-    }
-
-
-    /**
-     * load_core_configuration
-     * this is hooked into 'AHEE__EE_Bootstrap__load_core_configuration'
-     * which runs during the WP 'plugins_loaded' action at priority 5
-     *
-     * @return void
-     * @throws ReflectionException
-     * @throws Exception
-     */
-    public function load_core_configuration()
-    {
-        do_action('AHEE__EE_System__load_core_configuration__begin', $this);
-        $this->loader->getShared('EE_Load_Textdomain');
-        // load textdomain
-        EE_Load_Textdomain::load_textdomain();
-        // load and setup EE_Config and EE_Network_Config
-        $config = $this->loader->getShared('EE_Config');
-        $this->loader->getShared('EE_Network_Config');
-        // setup autoloaders
-        // enable logging?
-        $this->loader->getShared('EventEspresso\core\services\orm\TrashLogger');
-        if ($config->admin->use_remote_logging) {
-            $this->loader->getShared('EE_Log');
-        }
-        // check for activation errors
-        $activation_errors = get_option('ee_plugin_activation_errors', false);
-        if ($activation_errors) {
-            EE_Error::add_error($activation_errors, __FILE__, __FUNCTION__, __LINE__);
-            update_option('ee_plugin_activation_errors', false);
-        }
-        // get model names
-        $this->_parse_model_names();
-        // configure custom post type definitions
-        $this->loader->getShared('EventEspresso\core\domain\entities\custom_post_types\CustomTaxonomyDefinitions');
-        $this->loader->getShared('EventEspresso\core\domain\entities\custom_post_types\CustomPostTypeDefinitions');
-        do_action('AHEE__EE_System__load_core_configuration__complete', $this);
-    }
-
-
-    /**
-     * cycles through all of the models/*.model.php files, and assembles an array of model names
-     *
-     * @return void
-     * @throws ReflectionException
-     */
-    private function _parse_model_names()
-    {
-        // get all the files in the EE_MODELS folder that end in .model.php
-        $models                 = glob(EE_MODELS . '*.model.php');
-        $model_names            = [];
-        $non_abstract_db_models = [];
-        foreach ($models as $model) {
-            // get model classname
-            $classname       = EEH_File::get_classname_from_filepath_with_standard_filename($model);
-            $short_name      = str_replace('EEM_', '', $classname);
-            $reflectionClass = new ReflectionClass($classname);
-            if ($reflectionClass->isSubclassOf('EEM_Base') && ! $reflectionClass->isAbstract()) {
-                $non_abstract_db_models[ $short_name ] = $classname;
-            }
-            $model_names[ $short_name ] = $classname;
-        }
-        $this->registry->models                 = apply_filters('FHEE__EE_System__parse_model_names', $model_names);
-        $this->registry->non_abstract_db_models = apply_filters(
-            'FHEE__EE_System__parse_implemented_model_names',
-            $non_abstract_db_models
-        );
-    }
-
-
-    /**
-     * @throws Exception
-     * @since 4.9.71.p
-     */
-    public function loadRouteMatchSpecifications()
-    {
-        try {
-            $this->loader->getShared('EventEspresso\core\services\routing\RouteMatchSpecificationManager');
-            $this->loader->getShared('EventEspresso\core\services\routing\RouteCollection');
-            $this->router->loadPrimaryRoutes();
-        } catch (Exception $exception) {
-            new ExceptionStackTraceDisplay($exception);
-        }
-        do_action('AHEE__EE_System__loadRouteMatchSpecifications');
-    }
-
-
-    /**
-     * loading CPT related classes earlier so that their definitions are available
-     * but not performing any actual registration with WP core until load_CPTs_and_session() is called
-     *
-     * @since   4.10.21.p
-     */
-    public function loadCustomPostTypes()
-    {
-        $this->register_custom_taxonomies = $this->loader->getShared(
-            'EventEspresso\core\domain\services\custom_post_types\RegisterCustomTaxonomies'
-        );
-        $this->register_custom_post_types = $this->loader->getShared(
-            'EventEspresso\core\domain\services\custom_post_types\RegisterCustomPostTypes'
-        );
-        $this->register_custom_taxonomy_terms = $this->loader->getShared(
-            'EventEspresso\core\domain\services\custom_post_types\RegisterCustomTaxonomyTerms'
-        );
-        // integrate WP_Query with the EE models
-        $this->loader->getShared('EE_CPT_Strategy');
-        // load legacy EE_Request_Handler in case add-ons still need it
-        $this->loader->getShared('EE_Request_Handler');
-    }
-
-
-    /**
-     * register_shortcodes_modules_and_widgets
-     * generate lists of shortcodes and modules, then verify paths and classes
-     * This is hooked into 'AHEE__EE_Bootstrap__register_shortcodes_modules_and_widgets'
-     * which runs during the WP 'plugins_loaded' action at priority 7
-     *
-     * @access public
-     * @return void
-     * @throws Exception
-     */
-    public function register_shortcodes_modules_and_widgets()
-    {
-        $this->router->registerShortcodesModulesAndWidgets();
-        do_action('AHEE__EE_System__register_shortcodes_modules_and_widgets');
-        // check for addons using old hook point
-        if (has_action('AHEE__EE_System__register_shortcodes_modules_and_addons')) {
-            $this->_incompatible_addon_error();
-        }
-    }
-
-
-    /**
-     * _incompatible_addon_error
-     *
-     * @access public
-     * @return void
-     */
-    private function _incompatible_addon_error()
-    {
-        // get array of classes hooking into here
-        $class_names = EEH_Class_Tools::get_class_names_for_all_callbacks_on_hook(
-            'AHEE__EE_System__register_shortcodes_modules_and_addons'
-        );
-        if (! empty($class_names)) {
-            $msg = esc_html__(
-                'The following plugins, addons, or modules appear to be incompatible with this version of Event Espresso and were automatically deactivated to avoid fatal errors:',
-                'event_espresso'
-            );
-            $msg .= '<ul>';
-            foreach ($class_names as $class_name) {
-                $msg .= '<li><b>Event Espresso - '
-                        . str_replace(
-                            ['EE_', 'EEM_', 'EED_', 'EES_', 'EEW_'],
-                            '',
-                            $class_name
-                        ) . '</b></li>';
-            }
-            $msg .= '</ul>';
-            $msg .= esc_html__(
-                'Compatibility issues can be avoided and/or resolved by keeping addons and plugins updated to the latest version.',
-                'event_espresso'
-            );
-            // save list of incompatible addons to wp-options for later use
-            add_option('ee_incompatible_addons', $class_names, '', 'no');
-            if (is_admin()) {
-                EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
-            }
-        }
-    }
-
-
-    /**
-     * brew_espresso
-     * begins the process of setting hooks for initializing EE in the correct order
-     * This is happening on the 'AHEE__EE_Bootstrap__brew_espresso' hook point
-     * which runs during the WP 'plugins_loaded' action at priority 9
-     *
-     * @return void
-     * @throws Exception
-     */
-    public function brew_espresso()
-    {
-        do_action('AHEE__EE_System__brew_espresso__begin', $this);
-        // load some final core systems
-        add_action('init', [$this, 'set_hooks_for_core'], 1);
-        add_action('init', [$this, 'perform_activations_upgrades_and_migrations'], 3);
-        add_action('init', [$this, 'load_CPTs_and_session'], 5);
-        add_action('init', [$this, 'load_controllers'], 7);
-        add_action('init', [$this, 'core_loaded_and_ready'], 9);
-        add_action('init', [$this, 'initialize'], 10);
-        add_action('init', [$this, 'initialize_last'], 100);
-        $this->router->brewEspresso();
-        do_action('AHEE__EE_System__brew_espresso__complete', $this);
-    }
-
-
-    /**
-     *    set_hooks_for_core
-     *
-     * @access public
-     * @return    void
-     * @throws EE_Error
-     */
-    public function set_hooks_for_core()
-    {
-        $this->_deactivate_incompatible_addons();
-        do_action('AHEE__EE_System__set_hooks_for_core');
-        $this->loader->getShared('EventEspresso\core\domain\values\session\SessionLifespan');
-        // caps need to be initialized on every request so that capability maps are set.
-        // @see https://events.codebasehq.com/projects/event-espresso/tickets/8674
-        $this->registry->CAP->init_caps();
-    }
-
-
-    /**
-     * Using the information gathered in EE_System::_incompatible_addon_error,
-     * deactivates any addons considered incompatible with the current version of EE
-     */
-    private function _deactivate_incompatible_addons()
-    {
-        $incompatible_addons = get_option('ee_incompatible_addons', []);
-        if (! empty($incompatible_addons)) {
-            $active_plugins = get_option('active_plugins', []);
-            foreach ($active_plugins as $active_plugin) {
-                foreach ($incompatible_addons as $incompatible_addon) {
-                    if (strpos($active_plugin, $incompatible_addon) !== false) {
-                        $this->request->unSetRequestParams(['activate'], true);
-                        espresso_deactivate_plugin($active_plugin);
-                    }
-                }
-            }
-        }
-    }
-
-
-    /**
-     *    perform_activations_upgrades_and_migrations
-     *
-     * @access public
-     * @return    void
-     */
-    public function perform_activations_upgrades_and_migrations()
-    {
-        do_action('AHEE__EE_System__perform_activations_upgrades_and_migrations');
-    }
-
-
-    /**
-     * @return void
-     * @throws DomainException
-     */
-    public function load_CPTs_and_session()
-    {
-        do_action('AHEE__EE_System__load_CPTs_and_session__start');
-        $this->register_custom_taxonomies->registerCustomTaxonomies();
-        $this->register_custom_post_types->registerCustomPostTypes();
-        $this->register_custom_taxonomy_terms->registerCustomTaxonomyTerms();
-        // load legacy Custom Post Types and Taxonomies
-        $this->loader->getShared('EE_Register_CPTs');
-        do_action('AHEE__EE_System__load_CPTs_and_session__complete');
-    }
-
-
-    /**
-     * load_controllers
-     * this is the best place to load any additional controllers that needs access to EE core.
-     * it is expected that all basic core EE systems, that are not dependant on the current request are loaded at this
-     * time
-     *
-     * @access public
-     * @return void
-     * @throws Exception
-     */
-    public function load_controllers()
-    {
-        do_action('AHEE__EE_System__load_controllers__start');
-        $this->router->loadControllers();
-        do_action('AHEE__EE_System__load_controllers__complete');
-    }
-
-
-    /**
-     * core_loaded_and_ready
-     * all of the basic EE core should be loaded at this point and available regardless of M-Mode
-     *
-     * @access public
-     * @return void
-     * @throws Exception
-     */
-    public function core_loaded_and_ready()
-    {
-        $this->router->coreLoadedAndReady();
-        do_action('AHEE__EE_System__core_loaded_and_ready');
-        // always load template tags, because it's faster than checking if it's a front-end request, and many page
-        // builders require these even on the front-end
-        require_once EE_PUBLIC . 'template_tags.php';
-        do_action('AHEE__EE_System__set_hooks_for_shortcodes_modules_and_addons');
-    }
-
-
-    /**
-     * initialize
-     * this is the best place to begin initializing client code
-     *
-     * @access public
-     * @return void
-     */
-    public function initialize()
-    {
-        do_action('AHEE__EE_System__initialize');
-        add_filter(
-            'safe_style_css',
-            function ($styles) {
-                $styles[] = 'display';
-                $styles[] = 'visibility';
-                $styles[] = 'position';
-                $styles[] = 'top';
-                $styles[] = 'right';
-                $styles[] = 'bottom';
-                $styles[] = 'left';
-                $styles[] = 'resize';
-                $styles[] = 'max-width';
-                $styles[] = 'max-height';
-                return $styles;
-            }
-        );
-    }
-
-
-    /**
-     * initialize_last
-     * this is run really late during the WP init hook point, and ensures that mostly everything else that needs to
-     * initialize has done so
-     *
-     * @access public
-     * @return void
-     * @throws Exception
-     */
-    public function initialize_last()
-    {
-        $this->router->initializeLast();
-        do_action('AHEE__EE_System__initialize_last');
-        /** @var EventEspresso\core\domain\services\custom_post_types\RewriteRules $rewrite_rules */
-        $rewrite_rules = $this->loader->getShared(
-            'EventEspresso\core\domain\services\custom_post_types\RewriteRules'
-        );
-        $rewrite_rules->flushRewriteRules();
-        add_action('admin_bar_init', [$this, 'addEspressoToolbar']);
-    }
-
-
-    /**
-     * @return void
-     */
-    public function addEspressoToolbar()
-    {
-        $this->loader->getShared(
-            'EventEspresso\core\domain\services\admin\AdminToolBar',
-            [$this->registry->CAP]
-        );
-    }
-
-
-    /**
-     * do_not_cache
-     * sets no cache headers and defines no cache constants for WP plugins
-     *
-     * @access public
-     * @return void
-     */
-    public static function do_not_cache()
-    {
-        // set no cache constants
-        if (! defined('DONOTCACHEPAGE')) {
-            define('DONOTCACHEPAGE', true);
-        }
-        if (! defined('DONOTCACHCEOBJECT')) {
-            define('DONOTCACHCEOBJECT', true);
-        }
-        if (! defined('DONOTCACHEDB')) {
-            define('DONOTCACHEDB', true);
-        }
-        // add no cache headers
-        add_action('send_headers', ['EE_System', 'nocache_headers'], 10);
-        // plus a little extra for nginx and Google Chrome
-        add_filter('nocache_headers', ['EE_System', 'extra_nocache_headers'], 10, 1);
-        // prevent browsers from prefetching of the rel='next' link, because it may contain content that interferes with the registration process
-        remove_action('wp_head', 'adjacent_posts_rel_link_wp_head');
-    }
-
-
-    /**
-     *    extra_nocache_headers
-     *
-     * @access    public
-     * @param $headers
-     * @return    array
-     */
-    public static function extra_nocache_headers($headers): array
-    {
-        // for NGINX
-        $headers['X-Accel-Expires'] = 0;
-        // plus extra for Google Chrome since it doesn't seem to respect "no-cache", but WILL respect "no-store"
-        $headers['Cache-Control'] = 'no-store, no-cache, must-revalidate, max-age=0';
-        return $headers;
-    }
-
-
-    /**
-     *    nocache_headers
-     *
-     * @access    public
-     * @return    void
-     */
-    public static function nocache_headers()
-    {
-        nocache_headers();
-    }
-
-
-    /**
-     * simply hooks into "wp_list_pages_exclude" filter (for wp_list_pages method) and makes sure EE critical pages are
-     * never returned with the function.
-     *
-     * @param array $exclude_array any existing pages being excluded are in this array.
-     * @return array
-     */
-    public function remove_pages_from_wp_list_pages(array $exclude_array): array
-    {
-        return array_merge($exclude_array, $this->registry->CFG->core->get_critical_pages_array());
-    }
+	/**
+	 * indicates this is a 'normal' request. Ie, not activation, nor upgrade, nor activation.
+	 * So examples of this would be a normal GET request on the frontend or backend, or a POST, etc
+	 */
+	const req_type_normal = 0;
+
+	/**
+	 * Indicates this is a brand new installation of EE so we should install
+	 * tables and default data etc
+	 */
+	const req_type_new_activation = 1;
+
+	/**
+	 * we've detected that EE has been reactivated (or EE was activated during maintenance mode,
+	 * and we just exited maintenance mode). We MUST check the database is setup properly
+	 * and that default data is setup too
+	 */
+	const req_type_reactivation = 2;
+
+	/**
+	 * indicates that EE has been upgraded since its previous request.
+	 * We may have data migration scripts to call and will want to trigger maintenance mode
+	 */
+	const req_type_upgrade = 3;
+
+	/**
+	 * TODO  will detect that EE has been DOWNGRADED. We probably don't want to run in this case...
+	 */
+	const req_type_downgrade = 4;
+
+	/**
+	 * @deprecated since version 4.6.0.dev.006
+	 * Now whenever a new_activation is detected the request type is still just
+	 * new_activation (same for reactivation, upgrade, downgrade etc), but if we're in maintenance mode
+	 * EE_System::initialize_db_if_no_migrations_required and EE_Addon::initialize_db_if_no_migrations_required
+	 * will instead enqueue that EE plugin's db initialization for when we're taken out of maintenance mode.
+	 * (Specifically, when the migration manager indicates migrations are finished
+	 * EE_Data_Migration_Manager::initialize_db_for_enqueued_ee_plugins() will be called)
+	 */
+	const req_type_activation_but_not_installed = 5;
+
+	/**
+	 * option prefix for recording the activation history (like core's "espresso_db_update") of addons
+	 */
+	const addon_activation_history_option_prefix = 'ee_addon_activation_history_';
+
+	/**
+	 * @var AddonManager $addon_manager
+	 */
+	private $addon_manager;
+
+	/**
+	 * @var EE_System $_instance
+	 */
+	private static $_instance;
+
+	/**
+	 * @var EE_Registry $registry
+	 */
+	private $registry;
+
+	/**
+	 * @var LoaderInterface $loader
+	 */
+	private $loader;
+
+	/**
+	 * @var EE_Capabilities $capabilities
+	 */
+	private $capabilities;
+
+	/**
+	 * @var EE_Maintenance_Mode $maintenance_mode
+	 */
+	private $maintenance_mode;
+
+	/**
+	 * @var RequestInterface $request
+	 */
+	private $request;
+
+	/**
+	 * Stores which type of request this is, options being one of the constants on EE_System starting with req_type_*.
+	 * It can be a brand-new activation, a reactivation, an upgrade, a downgrade, or a normal request.
+	 *
+	 * @var int $_req_type
+	 */
+	private $_req_type;
+
+	/**
+	 * Whether or not there was a non-micro version change in EE core version during this request
+	 *
+	 * @var boolean $_major_version_change
+	 */
+	private $_major_version_change = false;
+
+	/**
+	 * @var Router $router
+	 */
+	private $router;
+
+	/**
+	 * @param EventEspresso\core\domain\services\custom_post_types\RegisterCustomPostTypes
+	 */
+	private $register_custom_post_types;
+
+	/**
+	 * @param EventEspresso\core\domain\services\custom_post_types\RegisterCustomTaxonomies
+	 */
+	private $register_custom_taxonomies;
+
+	/**
+	 * @param EventEspresso\core\domain\services\custom_post_types\RegisterCustomTaxonomyTerms
+	 */
+	private $register_custom_taxonomy_terms;
+
+	/**
+	 * @singleton method used to instantiate class object
+	 * @param LoaderInterface|null     $loader
+	 * @param EE_Maintenance_Mode|null $maintenance_mode
+	 * @param EE_Registry|null         $registry
+	 * @param RequestInterface|null    $request
+	 * @param Router|null              $router
+	 * @return EE_System
+	 */
+	public static function instance(
+		LoaderInterface $loader = null,
+		EE_Maintenance_Mode $maintenance_mode = null,
+		EE_Registry $registry = null,
+		RequestInterface $request = null,
+		Router $router = null
+	): EE_System {
+		// check if class object is instantiated
+		if (! self::$_instance instanceof EE_System) {
+			self::$_instance = new self($loader, $maintenance_mode, $registry, $request, $router);
+		}
+		return self::$_instance;
+	}
+
+
+	/**
+	 * resets the instance and returns it
+	 *
+	 * @return EE_System
+	 */
+	public static function reset(): EE_System
+	{
+		self::$_instance->_req_type = null;
+		// make sure none of the old hooks are left hanging around
+		remove_all_actions('AHEE__EE_System__perform_activations_upgrades_and_migrations');
+		// we need to reset the migration manager in order for it to detect DMSs properly
+		EE_Data_Migration_Manager::reset();
+		self::instance()->detect_activations_or_upgrades();
+		self::instance()->perform_activations_upgrades_and_migrations();
+		return self::instance();
+	}
+
+
+	/**
+	 * sets hooks for running rest of system
+	 * provides "AHEE__EE_System__construct__complete" hook for EE Addons to use as their starting point
+	 * starting EE Addons from any other point may lead to problems
+	 *
+	 * @param LoaderInterface     $loader
+	 * @param EE_Maintenance_Mode $maintenance_mode
+	 * @param EE_Registry         $registry
+	 * @param RequestInterface    $request
+	 * @param Router              $router
+	 */
+	private function __construct(
+		LoaderInterface $loader,
+		EE_Maintenance_Mode $maintenance_mode,
+		EE_Registry $registry,
+		RequestInterface $request,
+		Router $router
+	) {
+		$this->registry         = $registry;
+		$this->loader           = $loader;
+		$this->request          = $request;
+		$this->router           = $router;
+		$this->maintenance_mode = $maintenance_mode;
+		do_action('AHEE__EE_System__construct__begin', $this);
+		add_action(
+			'AHEE__EE_Bootstrap__load_espresso_addons',
+			[$this, 'loadCapabilities'],
+			5
+		);
+		add_action(
+			'AHEE__EE_Bootstrap__load_espresso_addons',
+			[$this, 'loadCommandBus'],
+			7
+		);
+		add_action(
+			'AHEE__EE_Bootstrap__load_espresso_addons',
+			[$this, 'loadPluginApi'],
+			9
+		);
+		// give caff stuff a chance to play during the activation process too.
+		add_action(
+			'AHEE__EE_Bootstrap__load_espresso_addons',
+			[$this, 'brewCaffeinated'],
+			9
+		);
+		// allow addons to load first so that they can register autoloaders, set hooks for running DMS's, etc
+		add_action(
+			'AHEE__EE_Bootstrap__load_espresso_addons',
+			[$this, 'load_espresso_addons']
+		);
+		// when an ee addon is activated, we want to call the core hook(s) again
+		// because the newly-activated addon didn't get a chance to run at all
+		add_action('activate_plugin', [$this, 'load_espresso_addons'], 1);
+		// detect whether install or upgrade
+		add_action(
+			'AHEE__EE_Bootstrap__detect_activations_or_upgrades',
+			[$this, 'detect_activations_or_upgrades'],
+			3
+		);
+		// load EE_Config, EE_Textdomain, etc
+		add_action(
+			'AHEE__EE_Bootstrap__load_core_configuration',
+			[$this, 'load_core_configuration'],
+			5
+		);
+		// load specifications for matching routes to current request
+		add_action(
+			'AHEE__EE_Bootstrap__load_core_configuration',
+			[$this, 'loadRouteMatchSpecifications']
+		);
+		// load specifications for custom post types
+		add_action(
+			'AHEE__EE_Bootstrap__load_core_configuration',
+			array($this, 'loadCustomPostTypes')
+		);
+		// load specifications for custom post types
+		add_action(
+			'AHEE__EE_Bootstrap__load_core_configuration',
+			array($this, 'loadCustomPostTypes')
+		);
+		// load EE_Config, EE_Textdomain, etc
+		add_action(
+			'AHEE__EE_Bootstrap__register_shortcodes_modules_and_widgets',
+			[$this, 'register_shortcodes_modules_and_widgets'],
+			7
+		);
+		// you wanna get going? I wanna get going... let's get going!
+		add_action(
+			'AHEE__EE_Bootstrap__brew_espresso',
+			[$this, 'brew_espresso'],
+			9
+		);
+		// other housekeeping
+		// exclude EE critical pages from wp_list_pages
+		add_filter(
+			'wp_list_pages_excludes',
+			[$this, 'remove_pages_from_wp_list_pages'],
+			10
+		);
+		// ALL EE Addons should use the following hook point to attach their initial setup too
+		// it's extremely important for EE Addons to register any class autoloaders so that they can be available when the EE_Config loads
+		do_action('AHEE__EE_System__construct__complete', $this);
+	}
+
+
+	/**
+	 * load and setup EE_Capabilities
+	 *
+	 * @return void
+	 */
+	public function loadCapabilities()
+	{
+		$this->capabilities = $this->loader->getShared('EE_Capabilities');
+		add_action(
+			'AHEE__EE_Capabilities__init_caps__before_initialization',
+			function () {
+				LoaderFactory::getLoader()->getShared('EventEspresso\PaymentMethods\Manager');
+				LoaderFactory::getLoader()->getShared('EE_Payment_Method_Manager');
+			}
+		);
+	}
+
+
+	/**
+	 * create and cache the CommandBus, and also add middleware
+	 * The CapChecker middleware requires the use of EE_Capabilities
+	 * which is why we need to load the CommandBus after Caps are set up
+	 * CommandBus middleware operate FIFO - First In First Out
+	 * so LocateMovedCommands will run first in order to return any new commands
+	 *
+	 * @return void
+	 */
+	public function loadCommandBus()
+	{
+		$this->loader->getShared(
+			'CommandBusInterface',
+			[
+				null,
+				apply_filters(
+					'FHEE__EE_Load_Espresso_Core__handle_request__CommandBus_middleware',
+					[
+						$this->loader->getShared('EventEspresso\core\services\commands\middleware\LocateMovedCommands'),
+						$this->loader->getShared('EventEspresso\core\services\commands\middleware\CapChecker'),
+						$this->loader->getShared('EventEspresso\core\services\commands\middleware\AddActionHook'),
+					]
+				),
+			]
+		);
+	}
+
+
+	/**
+	 * @return void
+	 * @throws Exception
+	 */
+	public function loadPluginApi()
+	{
+		$this->addon_manager = $this->loader->getShared(AddonManager::class);
+		$this->addon_manager->initialize();
+		$this->loader->getShared('EE_Request_Handler');
+	}
+
+
+	/**
+	 * The purpose of this method is to simply check for a file named "caffeinated/brewing_regular.php" for any hooks
+	 * that need to be setup before our EE_System launches.
+	 *
+	 * @return void
+	 * @throws DomainException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidClassException
+	 * @throws InvalidFilePathException
+	 * @throws EE_Error
+	 */
+	public function brewCaffeinated()
+	{
+		static $brew;
+		/** @var Domain $domain */
+		$domain = DomainFactory::getEventEspressoCoreDomain();
+		if ($domain->isCaffeinated() && ! $brew instanceof EE_Brewing_Regular) {
+			require_once EE_CAFF_PATH . 'brewing_regular.php';
+			/** @var EE_Brewing_Regular $brew */
+			$brew = LoaderFactory::getLoader()->getShared(EE_Brewing_Regular::class);
+			$brew->initializePUE();
+			add_action(
+				'AHEE__EE_System__load_core_configuration__begin',
+				[$brew, 'caffeinated']
+			);
+		}
+	}
+
+
+	/**
+	 * load_espresso_addons
+	 * allow addons to load first so that they can set hooks for running DMS's, etc
+	 * this is hooked into both:
+	 *    'AHEE__EE_Bootstrap__load_core_configuration'
+	 *        which runs during the WP 'plugins_loaded' action at priority 5
+	 *    and the WP 'activate_plugin' hook point
+	 *
+	 * @return void
+	 * @throws Exception
+	 */
+	public function load_espresso_addons()
+	{
+		// looking for hooks? they've been moved into the AddonManager to maintain compatibility
+		$this->addon_manager->loadAddons();
+	}
+
+
+	/**
+	 * detect_activations_or_upgrades
+	 * Checks for activation or upgrade of core first;
+	 * then also checks if any registered addons have been activated or upgraded
+	 * This is hooked into 'AHEE__EE_Bootstrap__detect_activations_or_upgrades'
+	 * which runs during the WP 'plugins_loaded' action at priority 3
+	 *
+	 * @access public
+	 * @return void
+	 */
+	public function detect_activations_or_upgrades()
+	{
+		// first off: let's make sure to handle core
+		$this->detect_if_activation_or_upgrade();
+		foreach ($this->registry->addons as $addon) {
+			if ($addon instanceof EE_Addon) {
+				// detect teh request type for that addon
+				$addon->detect_req_type();
+			}
+		}
+	}
+
+
+	/**
+	 * detect_if_activation_or_upgrade
+	 * Takes care of detecting whether this is a brand new install or code upgrade,
+	 * and either setting up the DB or setting up maintenance mode etc.
+	 *
+	 * @access public
+	 * @return void
+	 */
+	public function detect_if_activation_or_upgrade()
+	{
+		do_action('AHEE__EE_System___detect_if_activation_or_upgrade__begin');
+		// check if db has been updated, or if its a brand-new installation
+		$espresso_db_update = $this->fix_espresso_db_upgrade_option();
+		$request_type       = $this->detect_req_type($espresso_db_update);
+		// EEH_Debug_Tools::printr( $request_type, '$request_type', __FILE__, __LINE__ );
+		switch ($request_type) {
+			case EE_System::req_type_new_activation:
+				do_action('AHEE__EE_System__detect_if_activation_or_upgrade__new_activation');
+				$this->_handle_core_version_change($espresso_db_update);
+				break;
+			case EE_System::req_type_reactivation:
+				do_action('AHEE__EE_System__detect_if_activation_or_upgrade__reactivation');
+				$this->_handle_core_version_change($espresso_db_update);
+				break;
+			case EE_System::req_type_upgrade:
+				do_action('AHEE__EE_System__detect_if_activation_or_upgrade__upgrade');
+				// migrations may be required now that we've upgraded
+				$this->maintenance_mode->set_maintenance_mode_if_db_old();
+				$this->_handle_core_version_change($espresso_db_update);
+				break;
+			case EE_System::req_type_downgrade:
+				do_action('AHEE__EE_System__detect_if_activation_or_upgrade__downgrade');
+				// its possible migrations are no longer required
+				$this->maintenance_mode->set_maintenance_mode_if_db_old();
+				$this->_handle_core_version_change($espresso_db_update);
+				break;
+			case EE_System::req_type_normal:
+			default:
+				break;
+		}
+		do_action('AHEE__EE_System__detect_if_activation_or_upgrade__complete');
+	}
+
+
+	/**
+	 * Updates the list of installed versions and sets hooks for
+	 * initializing the database later during the request
+	 *
+	 * @param array $espresso_db_update
+	 */
+	private function _handle_core_version_change(array $espresso_db_update)
+	{
+		$this->update_list_of_installed_versions($espresso_db_update);
+		// get ready to verify the DB is ok (provided we aren't in maintenance mode, of course)
+		add_action(
+			'AHEE__EE_System__perform_activations_upgrades_and_migrations',
+			[$this, 'initialize_db_if_no_migrations_required']
+		);
+	}
+
+
+	/**
+	 * standardizes the wp option 'espresso_db_upgrade' which actually stores
+	 * information about what versions of EE have been installed and activated,
+	 * NOT necessarily the state of the database
+	 *
+	 * @param mixed $espresso_db_update           the value of the WordPress option.
+	 *                                            If not supplied, fetches it from the options table
+	 * @return array the correct value of 'espresso_db_upgrade', after saving it, if it needed correction
+	 */
+	private function fix_espresso_db_upgrade_option($espresso_db_update = null): array
+	{
+		do_action('FHEE__EE_System__manage_fix_espresso_db_upgrade_option__begin', $espresso_db_update);
+		if (! $espresso_db_update) {
+			$espresso_db_update = get_option('espresso_db_update');
+		}
+		// check that option is an array
+		if (! is_array($espresso_db_update)) {
+			// if option is FALSE, then it never existed
+			if ($espresso_db_update === false) {
+				// make $espresso_db_update an array and save option with autoload OFF
+				$espresso_db_update = [];
+				add_option('espresso_db_update', $espresso_db_update, '', 'no');
+			} else {
+				// option is NOT FALSE but also is NOT an array, so make it an array and save it
+				$espresso_db_update = [$espresso_db_update => []];
+				update_option('espresso_db_update', $espresso_db_update);
+			}
+		} else {
+			$corrected_db_update = [];
+			// if IS an array, but is it an array where KEYS are version numbers, and values are arrays?
+			foreach ($espresso_db_update as $should_be_version_string => $should_be_array) {
+				if (is_int($should_be_version_string) && ! is_array($should_be_array)) {
+					// the key is an int, and the value IS NOT an array
+					// so it must be numerically-indexed, where values are versions installed...
+					// fix it!
+					$version_string                         = $should_be_array;
+					$corrected_db_update[ $version_string ] = ['unknown-date'];
+				} else {
+					// ok it checks out
+					$corrected_db_update[ $should_be_version_string ] = $should_be_array;
+				}
+			}
+			$espresso_db_update = $corrected_db_update;
+			update_option('espresso_db_update', $espresso_db_update);
+		}
+		do_action('FHEE__EE_System__manage_fix_espresso_db_upgrade_option__complete', $espresso_db_update);
+		return ! empty($espresso_db_update) ? $espresso_db_update : [];
+	}
+
+
+	/**
+	 * Does the traditional work of setting up the plugin's database and adding default data.
+	 * If migration script/process did not exist, this is what would happen on every activation/reactivation/upgrade.
+	 * NOTE: if we're in maintenance mode (which would be the case if we detect there are data
+	 * migration scripts that need to be run and a version change happens), enqueues core for database initialization,
+	 * so that it will be done when migrations are finished
+	 *
+	 * @param boolean $initialize_addons_too if true, we double-check addons' database tables etc too;
+	 * @param boolean $verify_schema         if true will re-check the database tables have the correct schema.
+	 *                                       This is a resource-intensive job
+	 *                                       so we prefer to only do it when necessary
+	 * @return void
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	public function initialize_db_if_no_migrations_required($initialize_addons_too = false, $verify_schema = true)
+	{
+		$request_type = $this->detect_req_type();
+		// only initialize system if we're not in maintenance mode.
+		if ($this->maintenance_mode->level() !== EE_Maintenance_Mode::level_2_complete_maintenance) {
+			/** @var EventEspresso\core\domain\services\custom_post_types\RewriteRules $rewrite_rules */
+			$rewrite_rules = $this->loader->getShared(
+				'EventEspresso\core\domain\services\custom_post_types\RewriteRules'
+			);
+			$rewrite_rules->flush();
+			if ($verify_schema) {
+				EEH_Activation::initialize_db_and_folders();
+			}
+			EEH_Activation::initialize_db_content();
+			EEH_Activation::system_initialization();
+			if ($initialize_addons_too) {
+				$this->initialize_addons();
+			}
+		} else {
+			EE_Data_Migration_Manager::instance()->enqueue_db_initialization_for('Core');
+		}
+		if (
+			$request_type === EE_System::req_type_new_activation
+			|| $request_type === EE_System::req_type_reactivation
+			|| (
+				$request_type === EE_System::req_type_upgrade
+				&& $this->is_major_version_change()
+			)
+		) {
+			add_action('AHEE__EE_System__initialize_last', [$this, 'redirect_to_about_ee'], 9);
+		}
+	}
+
+
+	/**
+	 * Initializes the db for all registered addons
+	 *
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	public function initialize_addons()
+	{
+		// foreach registered addon, make sure its db is up-to-date too
+		foreach ($this->registry->addons as $addon) {
+			if ($addon instanceof EE_Addon) {
+				$addon->initialize_db_if_no_migrations_required();
+			}
+		}
+	}
+
+
+	/**
+	 * Adds the current code version to the saved wp option which stores a list of all ee versions ever installed.
+	 *
+	 * @param array  $version_history
+	 * @param string $current_version_to_add version to be added to the version history
+	 * @return    boolean success as to whether or not this option was changed
+	 */
+	public function update_list_of_installed_versions($version_history = null, $current_version_to_add = null): bool
+	{
+		if (! $version_history) {
+			$version_history = $this->fix_espresso_db_upgrade_option($version_history);
+		}
+		if ($current_version_to_add === null) {
+			$current_version_to_add = espresso_version();
+		}
+		$version_history[ $current_version_to_add ][] = date('Y-m-d H:i:s', time());
+		// re-save
+		return update_option('espresso_db_update', $version_history);
+	}
+
+
+	/**
+	 * Detects if the current version indicated in the has existed in the list of
+	 * previously-installed versions of EE (espresso_db_update). Does NOT modify it (ie, no side-effect)
+	 *
+	 * @param array $espresso_db_update array from the wp option stored under the name 'espresso_db_update'.
+	 *                                  If not supplied, fetches it from the options table.
+	 *                                  Also, caches its result so later parts of the code can also know whether
+	 *                                  there's been an update or not. This way we can add the current version to
+	 *                                  espresso_db_update, but still know if this is a new install or not
+	 * @return int one of the constants on EE_System::req_type_
+	 */
+	public function detect_req_type($espresso_db_update = null): int
+	{
+		if ($this->_req_type === null) {
+			$espresso_db_update          = ! empty($espresso_db_update)
+				? $espresso_db_update
+				: $this->fix_espresso_db_upgrade_option();
+			$this->_req_type             = EE_System::detect_req_type_given_activation_history(
+				$espresso_db_update,
+				'ee_espresso_activation',
+				espresso_version()
+			);
+			$this->_major_version_change = $this->_detect_major_version_change($espresso_db_update);
+			$this->request->setIsActivation($this->_req_type !== EE_System::req_type_normal);
+		}
+		return $this->_req_type;
+	}
+
+
+	/**
+	 * Returns whether or not there was a non-micro version change (ie, change in either
+	 * the first or second number in the version. Eg 4.9.0.rc.001 to 4.10.0.rc.000,
+	 * but not 4.9.0.rc.0001 to 4.9.1.rc.0001
+	 *
+	 * @param $activation_history
+	 * @return bool
+	 */
+	private function _detect_major_version_change($activation_history): bool
+	{
+		$previous_version       = EE_System::getMostRecentlyActiveVersion($activation_history);
+		$previous_version_parts = explode('.', $previous_version);
+		$current_version_parts  = explode('.', espresso_version());
+		return isset(
+			$previous_version_parts[0],
+			$previous_version_parts[1],
+			$current_version_parts[0],
+			$current_version_parts[1]
+		) && (
+			$previous_version_parts[0] !== $current_version_parts[0]
+			|| $previous_version_parts[1] !== $current_version_parts[1]
+		);
+	}
+
+
+	/**
+	 * Returns true if either the major or minor version of EE changed during this request.
+	 * Eg 4.9.0.rc.001 to 4.10.0.rc.000, but not 4.9.0.rc.0001 to 4.9.1.rc.0001
+	 *
+	 * @return bool
+	 */
+	public function is_major_version_change(): bool
+	{
+		return $this->_major_version_change;
+	}
+
+
+	/**
+	 * Determines the request type for any ee addon, given three piece of info: the current array of activation
+	 * histories (for core that' 'espresso_db_update' wp option); the name of the WordPress option which is temporarily
+	 * set upon activation of the plugin (for core it's 'ee_espresso_activation'); and the version that this plugin was
+	 * just activated to (for core that will always be espresso_version())
+	 *
+	 * @param array|null $activation_history             the option's value which stores the activation history for
+	 *                                                 this
+	 *                                                 ee plugin. for core that's 'espresso_db_update'
+	 * @param string $activation_indicator_option_name the name of the WordPress option that is temporarily set to
+	 *                                                 indicate that this plugin was just activated
+	 * @param string $current_version                  the version that was just upgraded to (for core that will be
+	 *                                                 espresso_version())
+	 * @return int one of the constants on EE_System::req_type_
+	 */
+	public static function detect_req_type_given_activation_history(
+		array $activation_history,
+		string $activation_indicator_option_name,
+		string $current_version
+	): int {
+		$version_change = self::compareVersionWithPrevious($activation_history, $current_version);
+		$is_activation  = get_option($activation_indicator_option_name, false);
+		$req_type       = self::getRequestType($activation_history, $version_change, $is_activation);
+		if ($is_activation) {
+			// cleanup in aisle 6
+			delete_option($activation_indicator_option_name);
+		}
+		return $req_type;
+	}
+
+
+	/**
+	 * @param array  $activation_history
+	 * @param int    $version_change
+	 * @param bool   $is_activation
+	 * @return int
+	 * @since 5.0.0.p
+	 */
+	private static function getRequestType(array $activation_history, int $version_change, bool $is_activation): int
+	{
+		// if no previous activation history exists, then this is a brand new install
+		if (empty($activation_history)) {
+			return EE_System::req_type_new_activation;
+		}
+		// current version is higher than previous version, so it's an upgrade
+		if ($version_change === 1) {
+			return EE_System::req_type_upgrade;
+		}
+		// current version is lower than previous version, so it's a downgrade
+		if ($version_change === -1) {
+			return EE_System::req_type_downgrade;
+		}
+		// version hasn't changed since last version so check if the activation indicator is set
+		// to determine if it's a reactivation, or just a normal request
+		return $is_activation
+			? EE_System::req_type_reactivation
+			: EE_System::req_type_normal;
+	}
+
+
+	/**
+	 * Detects if the $version_to_upgrade_to is higher than the most recent version in
+	 * the $activation_history_for_addon
+	 *
+	 * @param array  $activation_history    array where keys are versions,
+	 *                                      values are arrays of times activated (sometimes 'unknown-date')
+	 * @param string $current_version
+	 * @return int results of version_compare( $version_to_upgrade_to, $most_recently_active_version ).
+	 *                                      -1 if $version_to_upgrade_to is LOWER (downgrade);
+	 *                                      0 if $version_to_upgrade_to MATCHES (reactivation or normal request);
+	 *                                      1 if $version_to_upgrade_to is HIGHER (upgrade) ;
+	 */
+	private static function compareVersionWithPrevious(array $activation_history, string $current_version): int
+	{
+		// find the most recently-activated version
+		$most_recently_active_version = EE_System::getMostRecentlyActiveVersion($activation_history);
+		return version_compare($current_version, $most_recently_active_version);
+	}
+
+
+	/**
+	 * Gets the most recently active version listed in the activation history,
+	 * and if none are found (ie, it's a brand new install) returns '0.0.0.dev.000'.
+	 *
+	 * @param array $activation_history  (keys are versions, values are arrays of times activated,
+	 *                                   sometimes containing 'unknown-date'
+	 * @return string
+	 */
+	private static function getMostRecentlyActiveVersion(array $activation_history): string
+	{
+		$most_recent_activation_date  = '1970-01-01 00:00:00';
+		$most_recently_active_version = '0.0.0.dev.000';
+		if (is_array($activation_history)) {
+			foreach ($activation_history as $version => $activation_dates) {
+				// check there is a record of when this version was activated.
+				// Otherwise, mark it as unknown
+				if (! $activation_dates) {
+					$activation_dates = ['unknown-date'];
+				}
+				$activation_dates = is_string($activation_dates) ? [$activation_dates] : $activation_dates;
+				foreach ($activation_dates as $activation_date) {
+					if ($activation_date !== 'unknown-date' && $activation_date > $most_recent_activation_date) {
+						$most_recently_active_version = $version;
+						$most_recent_activation_date  = $activation_date;
+					}
+				}
+			}
+		}
+		return $most_recently_active_version;
+	}
+
+
+	/**
+	 * This redirects to the about EE page after activation
+	 *
+	 * @return void
+	 */
+	public function redirect_to_about_ee()
+	{
+		$notices = EE_Error::get_notices(false);
+		// if current user is an admin and it's not an ajax or rest request
+		if (
+			! isset($notices['errors'])
+			&& $this->request->isAdmin()
+			&& apply_filters(
+				'FHEE__EE_System__redirect_to_about_ee__do_redirect',
+				$this->capabilities->current_user_can('manage_options', 'espresso_about_default')
+			)
+		) {
+			$query_params = ['page' => 'espresso_about'];
+			if (EE_System::instance()->detect_req_type() === EE_System::req_type_new_activation) {
+				$query_params['new_activation'] = true;
+			}
+			if (EE_System::instance()->detect_req_type() === EE_System::req_type_reactivation) {
+				$query_params['reactivation'] = true;
+			}
+			$url = add_query_arg($query_params, admin_url('admin.php'));
+			EEH_URL::safeRedirectAndExit($url);
+		}
+	}
+
+
+	/**
+	 * load_core_configuration
+	 * this is hooked into 'AHEE__EE_Bootstrap__load_core_configuration'
+	 * which runs during the WP 'plugins_loaded' action at priority 5
+	 *
+	 * @return void
+	 * @throws ReflectionException
+	 * @throws Exception
+	 */
+	public function load_core_configuration()
+	{
+		do_action('AHEE__EE_System__load_core_configuration__begin', $this);
+		$this->loader->getShared('EE_Load_Textdomain');
+		// load textdomain
+		EE_Load_Textdomain::load_textdomain();
+		// load and setup EE_Config and EE_Network_Config
+		$config = $this->loader->getShared('EE_Config');
+		$this->loader->getShared('EE_Network_Config');
+		// setup autoloaders
+		// enable logging?
+		$this->loader->getShared('EventEspresso\core\services\orm\TrashLogger');
+		if ($config->admin->use_remote_logging) {
+			$this->loader->getShared('EE_Log');
+		}
+		// check for activation errors
+		$activation_errors = get_option('ee_plugin_activation_errors', false);
+		if ($activation_errors) {
+			EE_Error::add_error($activation_errors, __FILE__, __FUNCTION__, __LINE__);
+			update_option('ee_plugin_activation_errors', false);
+		}
+		// get model names
+		$this->_parse_model_names();
+		// configure custom post type definitions
+		$this->loader->getShared('EventEspresso\core\domain\entities\custom_post_types\CustomTaxonomyDefinitions');
+		$this->loader->getShared('EventEspresso\core\domain\entities\custom_post_types\CustomPostTypeDefinitions');
+		do_action('AHEE__EE_System__load_core_configuration__complete', $this);
+	}
+
+
+	/**
+	 * cycles through all of the models/*.model.php files, and assembles an array of model names
+	 *
+	 * @return void
+	 * @throws ReflectionException
+	 */
+	private function _parse_model_names()
+	{
+		// get all the files in the EE_MODELS folder that end in .model.php
+		$models                 = glob(EE_MODELS . '*.model.php');
+		$model_names            = [];
+		$non_abstract_db_models = [];
+		foreach ($models as $model) {
+			// get model classname
+			$classname       = EEH_File::get_classname_from_filepath_with_standard_filename($model);
+			$short_name      = str_replace('EEM_', '', $classname);
+			$reflectionClass = new ReflectionClass($classname);
+			if ($reflectionClass->isSubclassOf('EEM_Base') && ! $reflectionClass->isAbstract()) {
+				$non_abstract_db_models[ $short_name ] = $classname;
+			}
+			$model_names[ $short_name ] = $classname;
+		}
+		$this->registry->models                 = apply_filters('FHEE__EE_System__parse_model_names', $model_names);
+		$this->registry->non_abstract_db_models = apply_filters(
+			'FHEE__EE_System__parse_implemented_model_names',
+			$non_abstract_db_models
+		);
+	}
+
+
+	/**
+	 * @throws Exception
+	 * @since 4.9.71.p
+	 */
+	public function loadRouteMatchSpecifications()
+	{
+		try {
+			$this->loader->getShared('EventEspresso\core\services\routing\RouteMatchSpecificationManager');
+			$this->loader->getShared('EventEspresso\core\services\routing\RouteCollection');
+			$this->router->loadPrimaryRoutes();
+		} catch (Exception $exception) {
+			new ExceptionStackTraceDisplay($exception);
+		}
+		do_action('AHEE__EE_System__loadRouteMatchSpecifications');
+	}
+
+
+	/**
+	 * loading CPT related classes earlier so that their definitions are available
+	 * but not performing any actual registration with WP core until load_CPTs_and_session() is called
+	 *
+	 * @since   4.10.21.p
+	 */
+	public function loadCustomPostTypes()
+	{
+		$this->register_custom_taxonomies = $this->loader->getShared(
+			'EventEspresso\core\domain\services\custom_post_types\RegisterCustomTaxonomies'
+		);
+		$this->register_custom_post_types = $this->loader->getShared(
+			'EventEspresso\core\domain\services\custom_post_types\RegisterCustomPostTypes'
+		);
+		$this->register_custom_taxonomy_terms = $this->loader->getShared(
+			'EventEspresso\core\domain\services\custom_post_types\RegisterCustomTaxonomyTerms'
+		);
+		// integrate WP_Query with the EE models
+		$this->loader->getShared('EE_CPT_Strategy');
+		// load legacy EE_Request_Handler in case add-ons still need it
+		$this->loader->getShared('EE_Request_Handler');
+	}
+
+
+	/**
+	 * register_shortcodes_modules_and_widgets
+	 * generate lists of shortcodes and modules, then verify paths and classes
+	 * This is hooked into 'AHEE__EE_Bootstrap__register_shortcodes_modules_and_widgets'
+	 * which runs during the WP 'plugins_loaded' action at priority 7
+	 *
+	 * @access public
+	 * @return void
+	 * @throws Exception
+	 */
+	public function register_shortcodes_modules_and_widgets()
+	{
+		$this->router->registerShortcodesModulesAndWidgets();
+		do_action('AHEE__EE_System__register_shortcodes_modules_and_widgets');
+		// check for addons using old hook point
+		if (has_action('AHEE__EE_System__register_shortcodes_modules_and_addons')) {
+			$this->_incompatible_addon_error();
+		}
+	}
+
+
+	/**
+	 * _incompatible_addon_error
+	 *
+	 * @access public
+	 * @return void
+	 */
+	private function _incompatible_addon_error()
+	{
+		// get array of classes hooking into here
+		$class_names = EEH_Class_Tools::get_class_names_for_all_callbacks_on_hook(
+			'AHEE__EE_System__register_shortcodes_modules_and_addons'
+		);
+		if (! empty($class_names)) {
+			$msg = esc_html__(
+				'The following plugins, addons, or modules appear to be incompatible with this version of Event Espresso and were automatically deactivated to avoid fatal errors:',
+				'event_espresso'
+			);
+			$msg .= '<ul>';
+			foreach ($class_names as $class_name) {
+				$msg .= '<li><b>Event Espresso - '
+						. str_replace(
+							['EE_', 'EEM_', 'EED_', 'EES_', 'EEW_'],
+							'',
+							$class_name
+						) . '</b></li>';
+			}
+			$msg .= '</ul>';
+			$msg .= esc_html__(
+				'Compatibility issues can be avoided and/or resolved by keeping addons and plugins updated to the latest version.',
+				'event_espresso'
+			);
+			// save list of incompatible addons to wp-options for later use
+			add_option('ee_incompatible_addons', $class_names, '', 'no');
+			if (is_admin()) {
+				EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
+			}
+		}
+	}
+
+
+	/**
+	 * brew_espresso
+	 * begins the process of setting hooks for initializing EE in the correct order
+	 * This is happening on the 'AHEE__EE_Bootstrap__brew_espresso' hook point
+	 * which runs during the WP 'plugins_loaded' action at priority 9
+	 *
+	 * @return void
+	 * @throws Exception
+	 */
+	public function brew_espresso()
+	{
+		do_action('AHEE__EE_System__brew_espresso__begin', $this);
+		// load some final core systems
+		add_action('init', [$this, 'set_hooks_for_core'], 1);
+		add_action('init', [$this, 'perform_activations_upgrades_and_migrations'], 3);
+		add_action('init', [$this, 'load_CPTs_and_session'], 5);
+		add_action('init', [$this, 'load_controllers'], 7);
+		add_action('init', [$this, 'core_loaded_and_ready'], 9);
+		add_action('init', [$this, 'initialize'], 10);
+		add_action('init', [$this, 'initialize_last'], 100);
+		$this->router->brewEspresso();
+		do_action('AHEE__EE_System__brew_espresso__complete', $this);
+	}
+
+
+	/**
+	 *    set_hooks_for_core
+	 *
+	 * @access public
+	 * @return    void
+	 * @throws EE_Error
+	 */
+	public function set_hooks_for_core()
+	{
+		$this->_deactivate_incompatible_addons();
+		do_action('AHEE__EE_System__set_hooks_for_core');
+		$this->loader->getShared('EventEspresso\core\domain\values\session\SessionLifespan');
+		// caps need to be initialized on every request so that capability maps are set.
+		// @see https://events.codebasehq.com/projects/event-espresso/tickets/8674
+		$this->registry->CAP->init_caps();
+	}
+
+
+	/**
+	 * Using the information gathered in EE_System::_incompatible_addon_error,
+	 * deactivates any addons considered incompatible with the current version of EE
+	 */
+	private function _deactivate_incompatible_addons()
+	{
+		$incompatible_addons = get_option('ee_incompatible_addons', []);
+		if (! empty($incompatible_addons)) {
+			$active_plugins = get_option('active_plugins', []);
+			foreach ($active_plugins as $active_plugin) {
+				foreach ($incompatible_addons as $incompatible_addon) {
+					if (strpos($active_plugin, $incompatible_addon) !== false) {
+						$this->request->unSetRequestParams(['activate'], true);
+						espresso_deactivate_plugin($active_plugin);
+					}
+				}
+			}
+		}
+	}
+
+
+	/**
+	 *    perform_activations_upgrades_and_migrations
+	 *
+	 * @access public
+	 * @return    void
+	 */
+	public function perform_activations_upgrades_and_migrations()
+	{
+		do_action('AHEE__EE_System__perform_activations_upgrades_and_migrations');
+	}
+
+
+	/**
+	 * @return void
+	 * @throws DomainException
+	 */
+	public function load_CPTs_and_session()
+	{
+		do_action('AHEE__EE_System__load_CPTs_and_session__start');
+		$this->register_custom_taxonomies->registerCustomTaxonomies();
+		$this->register_custom_post_types->registerCustomPostTypes();
+		$this->register_custom_taxonomy_terms->registerCustomTaxonomyTerms();
+		// load legacy Custom Post Types and Taxonomies
+		$this->loader->getShared('EE_Register_CPTs');
+		do_action('AHEE__EE_System__load_CPTs_and_session__complete');
+	}
+
+
+	/**
+	 * load_controllers
+	 * this is the best place to load any additional controllers that needs access to EE core.
+	 * it is expected that all basic core EE systems, that are not dependant on the current request are loaded at this
+	 * time
+	 *
+	 * @access public
+	 * @return void
+	 * @throws Exception
+	 */
+	public function load_controllers()
+	{
+		do_action('AHEE__EE_System__load_controllers__start');
+		$this->router->loadControllers();
+		do_action('AHEE__EE_System__load_controllers__complete');
+	}
+
+
+	/**
+	 * core_loaded_and_ready
+	 * all of the basic EE core should be loaded at this point and available regardless of M-Mode
+	 *
+	 * @access public
+	 * @return void
+	 * @throws Exception
+	 */
+	public function core_loaded_and_ready()
+	{
+		$this->router->coreLoadedAndReady();
+		do_action('AHEE__EE_System__core_loaded_and_ready');
+		// always load template tags, because it's faster than checking if it's a front-end request, and many page
+		// builders require these even on the front-end
+		require_once EE_PUBLIC . 'template_tags.php';
+		do_action('AHEE__EE_System__set_hooks_for_shortcodes_modules_and_addons');
+	}
+
+
+	/**
+	 * initialize
+	 * this is the best place to begin initializing client code
+	 *
+	 * @access public
+	 * @return void
+	 */
+	public function initialize()
+	{
+		do_action('AHEE__EE_System__initialize');
+		add_filter(
+			'safe_style_css',
+			function ($styles) {
+				$styles[] = 'display';
+				$styles[] = 'visibility';
+				$styles[] = 'position';
+				$styles[] = 'top';
+				$styles[] = 'right';
+				$styles[] = 'bottom';
+				$styles[] = 'left';
+				$styles[] = 'resize';
+				$styles[] = 'max-width';
+				$styles[] = 'max-height';
+				return $styles;
+			}
+		);
+	}
+
+
+	/**
+	 * initialize_last
+	 * this is run really late during the WP init hook point, and ensures that mostly everything else that needs to
+	 * initialize has done so
+	 *
+	 * @access public
+	 * @return void
+	 * @throws Exception
+	 */
+	public function initialize_last()
+	{
+		$this->router->initializeLast();
+		do_action('AHEE__EE_System__initialize_last');
+		/** @var EventEspresso\core\domain\services\custom_post_types\RewriteRules $rewrite_rules */
+		$rewrite_rules = $this->loader->getShared(
+			'EventEspresso\core\domain\services\custom_post_types\RewriteRules'
+		);
+		$rewrite_rules->flushRewriteRules();
+		add_action('admin_bar_init', [$this, 'addEspressoToolbar']);
+	}
+
+
+	/**
+	 * @return void
+	 */
+	public function addEspressoToolbar()
+	{
+		$this->loader->getShared(
+			'EventEspresso\core\domain\services\admin\AdminToolBar',
+			[$this->registry->CAP]
+		);
+	}
+
+
+	/**
+	 * do_not_cache
+	 * sets no cache headers and defines no cache constants for WP plugins
+	 *
+	 * @access public
+	 * @return void
+	 */
+	public static function do_not_cache()
+	{
+		// set no cache constants
+		if (! defined('DONOTCACHEPAGE')) {
+			define('DONOTCACHEPAGE', true);
+		}
+		if (! defined('DONOTCACHCEOBJECT')) {
+			define('DONOTCACHCEOBJECT', true);
+		}
+		if (! defined('DONOTCACHEDB')) {
+			define('DONOTCACHEDB', true);
+		}
+		// add no cache headers
+		add_action('send_headers', ['EE_System', 'nocache_headers'], 10);
+		// plus a little extra for nginx and Google Chrome
+		add_filter('nocache_headers', ['EE_System', 'extra_nocache_headers'], 10, 1);
+		// prevent browsers from prefetching of the rel='next' link, because it may contain content that interferes with the registration process
+		remove_action('wp_head', 'adjacent_posts_rel_link_wp_head');
+	}
+
+
+	/**
+	 *    extra_nocache_headers
+	 *
+	 * @access    public
+	 * @param $headers
+	 * @return    array
+	 */
+	public static function extra_nocache_headers($headers): array
+	{
+		// for NGINX
+		$headers['X-Accel-Expires'] = 0;
+		// plus extra for Google Chrome since it doesn't seem to respect "no-cache", but WILL respect "no-store"
+		$headers['Cache-Control'] = 'no-store, no-cache, must-revalidate, max-age=0';
+		return $headers;
+	}
+
+
+	/**
+	 *    nocache_headers
+	 *
+	 * @access    public
+	 * @return    void
+	 */
+	public static function nocache_headers()
+	{
+		nocache_headers();
+	}
+
+
+	/**
+	 * simply hooks into "wp_list_pages_exclude" filter (for wp_list_pages method) and makes sure EE critical pages are
+	 * never returned with the function.
+	 *
+	 * @param array $exclude_array any existing pages being excluded are in this array.
+	 * @return array
+	 */
+	public function remove_pages_from_wp_list_pages(array $exclude_array): array
+	{
+		return array_merge($exclude_array, $this->registry->CFG->core->get_critical_pages_array());
+	}
 }

core/domain/DomainBase.php

Indentation +227 added lines, -227 removed lines

@@ -16,231 +16,231 @@
  */
 abstract class DomainBase implements DomainInterface
 {
-    const ASSETS_FOLDER = 'assets/';
-
-    /**
-     * Equivalent to `__FILE__` for main plugin file.
-     *
-     * @var FilePath
-     */
-    private $plugin_file;
-
-    /**
-     * String indicating version for plugin
-     *
-     * @var string
-     */
-    private $version;
-
-    /**
-     * @var string $plugin_basename
-     */
-    private $plugin_basename;
-
-    /**
-     * @var string $plugin_path
-     */
-    private $plugin_path;
-
-    /**
-     * @var string $plugin_url
-     */
-    private $plugin_url;
-
-    /**
-     * @var string $asset_namespace
-     */
-    private $asset_namespace;
-
-    /**
-     * @var string $assets_path
-     */
-    private $assets_path;
-
-    /**
-     * @var bool
-     */
-    protected $initialized = false;
-
-
-    /**
-     * Initializes internal properties.
-     *
-     * @param FilePath $plugin_file
-     * @param Version  $version
-     * @param string $asset_namespace
-     */
-    public function __construct(
-        FilePath $plugin_file,
-        Version $version,
-        string $asset_namespace = Domain::ASSET_NAMESPACE
-    ) {
-        $this->plugin_file = $plugin_file;
-        $this->version     = $version;
-        $this->initialize($asset_namespace);
-    }
-
-
-    /**
-     * @param string $asset_namespace
-     * @return void
-     * @since 5.0.0.p
-     */
-    public function initialize($asset_namespace = Domain::ASSET_NAMESPACE)
-    {
-        if (! $this->initialized) {
-            $this->plugin_basename = plugin_basename($this->pluginFile());
-            $this->plugin_path     = plugin_dir_path($this->pluginFile());
-            $this->plugin_url      = plugin_dir_url($this->pluginFile());
-            $this->setAssetNamespace($asset_namespace);
-            $this->setDistributionAssetsPath();
-            $this->initialized = true;
-        }
-    }
-
-
-    /**
-     * @param string $asset_namespace
-     * @return void
-     */
-    public function setAssetNamespace($asset_namespace = Domain::ASSET_NAMESPACE)
-    {
-        if (! $this->asset_namespace) {
-            $this->asset_namespace = sanitize_key(
-                // convert directory separators to dashes and remove file extension
-                str_replace(['/', '.php'], ['-', ''], $asset_namespace)
-            );
-        }
-    }
-
-
-    /**
-     * @throws DomainException
-     * @since 5.0.0.p
-     */
-    private function setDistributionAssetsPath()
-    {
-        $assets_folder_paths = [
-            $this->plugin_path . DomainBase::ASSETS_FOLDER,
-            $this->plugin_path . 'src/' . DomainBase::ASSETS_FOLDER,
-        ];
-        foreach ($assets_folder_paths as $assets_folder_path) {
-            if (is_readable($assets_folder_path)) {
-                $this->assets_path = trailingslashit($assets_folder_path);
-                // once we find a valid path, just break out of loop
-                break;
-            }
-        }
-    }
-
-
-    /**
-     * @return string
-     */
-    public function pluginFile(): string
-    {
-        return (string) $this->plugin_file;
-    }
-
-
-    /**
-     * @return FilePath
-     */
-    public function pluginFileObject(): FilePath
-    {
-        return $this->plugin_file;
-    }
-
-
-    /**
-     * @return string
-     */
-    public function pluginBasename(): string
-    {
-        return $this->plugin_basename;
-    }
-
-
-    /**
-     * @param string $additional_path
-     * @return string
-     */
-    public function pluginPath($additional_path = ''): string
-    {
-        return is_string($additional_path) && $additional_path !== ''
-            ? $this->plugin_path . $additional_path
-            : $this->plugin_path;
-    }
-
-
-    /**
-     * @param string $additional_path
-     * @return string
-     */
-    public function pluginUrl($additional_path = ''): string
-    {
-        return is_string($additional_path) && $additional_path !== ''
-            ? $this->plugin_url . $additional_path
-            : $this->plugin_url;
-    }
-
-
-    /**
-     * @return string
-     */
-    public function version(): string
-    {
-        return (string) $this->version;
-    }
-
-
-    /**
-     * @return Version
-     */
-    public function versionValueObject()
-    {
-        return $this->version;
-    }
-
-
-    /**
-     * @return string
-     */
-    public function distributionAssetsFolder(): string
-    {
-        return DomainBase::ASSETS_FOLDER;
-    }
-
-
-    /**
-     * @param string $additional_path
-     * @return string
-     */
-    public function distributionAssetsPath($additional_path = ''): string
-    {
-        return is_string($additional_path) && $additional_path !== ''
-            ? $this->assets_path . $additional_path
-            : $this->assets_path;
-    }
-
-
-    /**
-     * @param string $additional_path
-     * @return string
-     */
-    public function distributionAssetsUrl($additional_path = ''): string
-    {
-        return is_string($additional_path) && $additional_path !== ''
-            ? $this->plugin_url . DomainBase::ASSETS_FOLDER . $additional_path
-            : $this->plugin_url . DomainBase::ASSETS_FOLDER;
-    }
-
-
-    /**
-     * @return string
-     */
-    public function assetNamespace(): string
-    {
-        return $this->asset_namespace;
-    }
+	const ASSETS_FOLDER = 'assets/';
+
+	/**
+	 * Equivalent to `__FILE__` for main plugin file.
+	 *
+	 * @var FilePath
+	 */
+	private $plugin_file;
+
+	/**
+	 * String indicating version for plugin
+	 *
+	 * @var string
+	 */
+	private $version;
+
+	/**
+	 * @var string $plugin_basename
+	 */
+	private $plugin_basename;
+
+	/**
+	 * @var string $plugin_path
+	 */
+	private $plugin_path;
+
+	/**
+	 * @var string $plugin_url
+	 */
+	private $plugin_url;
+
+	/**
+	 * @var string $asset_namespace
+	 */
+	private $asset_namespace;
+
+	/**
+	 * @var string $assets_path
+	 */
+	private $assets_path;
+
+	/**
+	 * @var bool
+	 */
+	protected $initialized = false;
+
+
+	/**
+	 * Initializes internal properties.
+	 *
+	 * @param FilePath $plugin_file
+	 * @param Version  $version
+	 * @param string $asset_namespace
+	 */
+	public function __construct(
+		FilePath $plugin_file,
+		Version $version,
+		string $asset_namespace = Domain::ASSET_NAMESPACE
+	) {
+		$this->plugin_file = $plugin_file;
+		$this->version     = $version;
+		$this->initialize($asset_namespace);
+	}
+
+
+	/**
+	 * @param string $asset_namespace
+	 * @return void
+	 * @since 5.0.0.p
+	 */
+	public function initialize($asset_namespace = Domain::ASSET_NAMESPACE)
+	{
+		if (! $this->initialized) {
+			$this->plugin_basename = plugin_basename($this->pluginFile());
+			$this->plugin_path     = plugin_dir_path($this->pluginFile());
+			$this->plugin_url      = plugin_dir_url($this->pluginFile());
+			$this->setAssetNamespace($asset_namespace);
+			$this->setDistributionAssetsPath();
+			$this->initialized = true;
+		}
+	}
+
+
+	/**
+	 * @param string $asset_namespace
+	 * @return void
+	 */
+	public function setAssetNamespace($asset_namespace = Domain::ASSET_NAMESPACE)
+	{
+		if (! $this->asset_namespace) {
+			$this->asset_namespace = sanitize_key(
+				// convert directory separators to dashes and remove file extension
+				str_replace(['/', '.php'], ['-', ''], $asset_namespace)
+			);
+		}
+	}
+
+
+	/**
+	 * @throws DomainException
+	 * @since 5.0.0.p
+	 */
+	private function setDistributionAssetsPath()
+	{
+		$assets_folder_paths = [
+			$this->plugin_path . DomainBase::ASSETS_FOLDER,
+			$this->plugin_path . 'src/' . DomainBase::ASSETS_FOLDER,
+		];
+		foreach ($assets_folder_paths as $assets_folder_path) {
+			if (is_readable($assets_folder_path)) {
+				$this->assets_path = trailingslashit($assets_folder_path);
+				// once we find a valid path, just break out of loop
+				break;
+			}
+		}
+	}
+
+
+	/**
+	 * @return string
+	 */
+	public function pluginFile(): string
+	{
+		return (string) $this->plugin_file;
+	}
+
+
+	/**
+	 * @return FilePath
+	 */
+	public function pluginFileObject(): FilePath
+	{
+		return $this->plugin_file;
+	}
+
+
+	/**
+	 * @return string
+	 */
+	public function pluginBasename(): string
+	{
+		return $this->plugin_basename;
+	}
+
+
+	/**
+	 * @param string $additional_path
+	 * @return string
+	 */
+	public function pluginPath($additional_path = ''): string
+	{
+		return is_string($additional_path) && $additional_path !== ''
+			? $this->plugin_path . $additional_path
+			: $this->plugin_path;
+	}
+
+
+	/**
+	 * @param string $additional_path
+	 * @return string
+	 */
+	public function pluginUrl($additional_path = ''): string
+	{
+		return is_string($additional_path) && $additional_path !== ''
+			? $this->plugin_url . $additional_path
+			: $this->plugin_url;
+	}
+
+
+	/**
+	 * @return string
+	 */
+	public function version(): string
+	{
+		return (string) $this->version;
+	}
+
+
+	/**
+	 * @return Version
+	 */
+	public function versionValueObject()
+	{
+		return $this->version;
+	}
+
+
+	/**
+	 * @return string
+	 */
+	public function distributionAssetsFolder(): string
+	{
+		return DomainBase::ASSETS_FOLDER;
+	}
+
+
+	/**
+	 * @param string $additional_path
+	 * @return string
+	 */
+	public function distributionAssetsPath($additional_path = ''): string
+	{
+		return is_string($additional_path) && $additional_path !== ''
+			? $this->assets_path . $additional_path
+			: $this->assets_path;
+	}
+
+
+	/**
+	 * @param string $additional_path
+	 * @return string
+	 */
+	public function distributionAssetsUrl($additional_path = ''): string
+	{
+		return is_string($additional_path) && $additional_path !== ''
+			? $this->plugin_url . DomainBase::ASSETS_FOLDER . $additional_path
+			: $this->plugin_url . DomainBase::ASSETS_FOLDER;
+	}
+
+
+	/**
+	 * @return string
+	 */
+	public function assetNamespace(): string
+	{
+		return $this->asset_namespace;
+	}
 }

core/domain/values/assets/JavascriptAsset.php

Indentation +168 added lines, -168 removed lines

@@ -18,172 +18,172 @@
 class JavascriptAsset extends BrowserAsset
 {
 
-    /**
-     * @var boolean $load_in_footer
-     */
-    private $load_in_footer = false;
-
-    /**
-     * @var boolean $requires_translation
-     */
-    private $requires_translation = false;
-
-    /**
-     * @var boolean $has_inline_data
-     */
-    private $has_inline_data = false;
-
-    /**
-     * @var Closure $inline_data_callback
-     */
-    private $inline_data_callback;
-
-
-    /**
-     * Asset constructor.
-     *
-     * @param string          $handle
-     * @param string          $source
-     * @param array           $dependencies
-     * @param bool            $load_in_footer
-     * @param DomainInterface $domain
-     * @param string          $version
-     * @throws InvalidDataTypeException
-     * @throws DomainException
-     */
-    public function __construct(
-        $handle,
-        $source,
-        array $dependencies,
-        $load_in_footer,
-        DomainInterface $domain,
-        $version = ''
-    ) {
-        parent::__construct(Asset::TYPE_JS, $handle, $source, $dependencies, $domain, $version);
-        $this->setLoadInFooter($load_in_footer);
-    }
-
-
-    /**
-     * @return bool
-     */
-    public function loadInFooter()
-    {
-        return $this->load_in_footer;
-    }
-
-
-    /**
-     * @param bool $load_in_footer
-     */
-    private function setLoadInFooter($load_in_footer = true)
-    {
-        $this->load_in_footer = filter_var($load_in_footer, FILTER_VALIDATE_BOOLEAN);
-    }
-
-
-    /**
-     * @return bool
-     */
-    public function requiresTranslation()
-    {
-        return $this->requires_translation;
-    }
-
-
-    /**
-     * @return bool
-     */
-    public function hasInlineData()
-    {
-        return $this->has_inline_data;
-    }
-
-
-    /**
-     * @param bool $has_inline_data
-     * @return JavascriptAsset
-     */
-    public function setHasInlineData($has_inline_data = true)
-    {
-        $this->has_inline_data = filter_var($has_inline_data, FILTER_VALIDATE_BOOLEAN);
-        return $this;
-    }
-
-
-    /**
-     * @return Closure
-     */
-    public function inlineDataCallback()
-    {
-        return $this->inline_data_callback;
-    }
-
-
-    /**
-     * @return bool
-     */
-    public function hasInlineDataCallback()
-    {
-        return $this->inline_data_callback instanceof Closure;
-    }
-
-
-    /**
-     * @param Closure $inline_data_callback
-     * @return JavascriptAsset
-     */
-    public function setInlineDataCallback(Closure $inline_data_callback)
-    {
-        $this->inline_data_callback = $inline_data_callback;
-        $this->setHasInlineData();
-        return $this;
-    }
-
-
-    /**
-     * @since 4.9.62.p
-     */
-    public function enqueueAsset()
-    {
-        if ($this->source() === '') {
-            return;
-        }
-        $attributes = $this->getAttributes();
-        if (!empty($attributes)) {
-            add_filter('script_loader_tag', [$this, 'addAttributeTagsToScript'], 10, 2);
-        }
-        wp_enqueue_script($this->handle());
-    }
-
-
-    public function addAttributeTagsToScript($tag, $handle)
-    {
-        if ($handle === $this->handle()) {
-            $attributes = $this->getAttributes();
-            $attributes_string = '';
-            foreach ($attributes as $key => $value) {
-                if (is_int($key)) {
-                    $attributes_string .= " {$value}";
-                } else {
-                    $attributes_string .= " {$key}='{$value}'";
-                }
-            }
-            $tag = str_replace('></script>', $attributes_string . '></script>', $tag);
-        }
-
-        return $tag;
-    }
-
-
-    /**
-     * @deprecated 5.0.0.p
-     * @param bool $requires_translation
-     * @return JavascriptAsset
-     */
-    public function setRequiresTranslation($requires_translation = true)
-    {
-        $this->requires_translation = filter_var($requires_translation, FILTER_VALIDATE_BOOLEAN);
-        return $this;
-    }
+	/**
+	 * @var boolean $load_in_footer
+	 */
+	private $load_in_footer = false;
+
+	/**
+	 * @var boolean $requires_translation
+	 */
+	private $requires_translation = false;
+
+	/**
+	 * @var boolean $has_inline_data
+	 */
+	private $has_inline_data = false;
+
+	/**
+	 * @var Closure $inline_data_callback
+	 */
+	private $inline_data_callback;
+
+
+	/**
+	 * Asset constructor.
+	 *
+	 * @param string          $handle
+	 * @param string          $source
+	 * @param array           $dependencies
+	 * @param bool            $load_in_footer
+	 * @param DomainInterface $domain
+	 * @param string          $version
+	 * @throws InvalidDataTypeException
+	 * @throws DomainException
+	 */
+	public function __construct(
+		$handle,
+		$source,
+		array $dependencies,
+		$load_in_footer,
+		DomainInterface $domain,
+		$version = ''
+	) {
+		parent::__construct(Asset::TYPE_JS, $handle, $source, $dependencies, $domain, $version);
+		$this->setLoadInFooter($load_in_footer);
+	}
+
+
+	/**
+	 * @return bool
+	 */
+	public function loadInFooter()
+	{
+		return $this->load_in_footer;
+	}
+
+
+	/**
+	 * @param bool $load_in_footer
+	 */
+	private function setLoadInFooter($load_in_footer = true)
+	{
+		$this->load_in_footer = filter_var($load_in_footer, FILTER_VALIDATE_BOOLEAN);
+	}
+
+
+	/**
+	 * @return bool
+	 */
+	public function requiresTranslation()
+	{
+		return $this->requires_translation;
+	}
+
+
+	/**
+	 * @return bool
+	 */
+	public function hasInlineData()
+	{
+		return $this->has_inline_data;
+	}
+
+
+	/**
+	 * @param bool $has_inline_data
+	 * @return JavascriptAsset
+	 */
+	public function setHasInlineData($has_inline_data = true)
+	{
+		$this->has_inline_data = filter_var($has_inline_data, FILTER_VALIDATE_BOOLEAN);
+		return $this;
+	}
+
+
+	/**
+	 * @return Closure
+	 */
+	public function inlineDataCallback()
+	{
+		return $this->inline_data_callback;
+	}
+
+
+	/**
+	 * @return bool
+	 */
+	public function hasInlineDataCallback()
+	{
+		return $this->inline_data_callback instanceof Closure;
+	}
+
+
+	/**
+	 * @param Closure $inline_data_callback
+	 * @return JavascriptAsset
+	 */
+	public function setInlineDataCallback(Closure $inline_data_callback)
+	{
+		$this->inline_data_callback = $inline_data_callback;
+		$this->setHasInlineData();
+		return $this;
+	}
+
+
+	/**
+	 * @since 4.9.62.p
+	 */
+	public function enqueueAsset()
+	{
+		if ($this->source() === '') {
+			return;
+		}
+		$attributes = $this->getAttributes();
+		if (!empty($attributes)) {
+			add_filter('script_loader_tag', [$this, 'addAttributeTagsToScript'], 10, 2);
+		}
+		wp_enqueue_script($this->handle());
+	}
+
+
+	public function addAttributeTagsToScript($tag, $handle)
+	{
+		if ($handle === $this->handle()) {
+			$attributes = $this->getAttributes();
+			$attributes_string = '';
+			foreach ($attributes as $key => $value) {
+				if (is_int($key)) {
+					$attributes_string .= " {$value}";
+				} else {
+					$attributes_string .= " {$key}='{$value}'";
+				}
+			}
+			$tag = str_replace('></script>', $attributes_string . '></script>', $tag);
+		}
+
+		return $tag;
+	}
+
+
+	/**
+	 * @deprecated 5.0.0.p
+	 * @param bool $requires_translation
+	 * @return JavascriptAsset
+	 */
+	public function setRequiresTranslation($requires_translation = true)
+	{
+		$this->requires_translation = filter_var($requires_translation, FILTER_VALIDATE_BOOLEAN);
+		return $this;
+	}
 }

core/domain/values/assets/BrowserAsset.php

Indentation +230 added lines, -230 removed lines

@@ -17,234 +17,234 @@
 abstract class BrowserAsset extends Asset
 {
 
-    /**
-     * @var array $attributes
-     */
-    private $attributes = [];
-
-    /**
-     * @var array $allowed_attributes
-     */
-    private static $allowed_attributes = [
-        Asset::TYPE_CSS => [
-            'crossorigin',
-            'media',
-            'referrerpolicy',
-            'sizes',
-            'type',
-        ],
-        Asset::TYPE_JS => [
-            'async',
-            'charset',
-            'crossorigin',
-            'defer',
-            'type',
-        ]
-    ];
-
-    /**
-     * @var array $dependencies
-     */
-    private $dependencies;
-
-    /**
-     * @var string $source
-     */
-    private $source;
-
-    /**
-     * @var string $version
-     */
-    private $version;
-
-
-    /**
-     * Asset constructor.
-     *
-     * @param string          $type
-     * @param string          $handle
-     * @param string          $source
-     * @param array           $dependencies
-     * @param DomainInterface $domain
-     * @param string          $version
-     * @throws DomainException
-     * @throws InvalidDataTypeException
-     */
-    public function __construct($type, $handle, $source, array $dependencies, DomainInterface $domain, $version = '')
-    {
-        parent::__construct($type, $handle, $domain);
-        $this->setSource($source);
-        $this->setDependencies($dependencies);
-        $this->setVersion($version, false);
-    }
-
-
-    /**
-     * @since 4.9.62.p
-     */
-    abstract public function enqueueAsset();
-
-
-    /**
-     * @return array
-     */
-    public function getAttributes()
-    {
-        return $this->attributes;
-    }
-
-
-    /**
-     * @param array $attributes
-     * @throws DomainException
-     * @since 5.0.0.p
-     */
-    public function addAttributes(array $attributes)
-    {
-        if (empty($attributes)) {
-            throw new DomainException(
-                esc_html__('The attributes array needs at least one value.', 'event_espresso')
-            );
-        }
-        foreach ($attributes as $key => $value) {
-            if (is_int($key) && $this->validateAttribute($value)) {
-                $this->attributes[] = $value;
-            } else if ($this->validateAttribute($key)) {
-                $this->attributes[ $key ] = $value;
-            }
-        }
-    }
-
-
-    /**
-     * @param string $attribute
-     * @return bool
-     * @throws DomainException
-     * @since 5.0.0.p
-     */
-    private function validateAttribute($attribute)
-    {
-        $allowed = BrowserAsset::$allowed_attributes[ $this->type() ];
-        if (! in_array($attribute, $allowed, true)) {
-            throw new DomainException(
-                sprintf(
-                    esc_html__('Invalid attribute! The only allowed attributes are: "%1$s"', 'event_espresso'),
-                    implode('", "', $allowed)
-                )
-            );
-        }
-        return true;
-    }
-
-
-    /**
-     * @return array
-     */
-    public function dependencies()
-    {
-        return $this->dependencies;
-    }
-
-
-    /**
-     * @param array $dependencies
-     */
-    public function addDependencies(array $dependencies)
-    {
-        $this->dependencies = array_merge($this->dependencies, $dependencies);
-    }
-
-
-    /**
-     * @param array $dependencies
-     */
-    protected function setDependencies(array $dependencies)
-    {
-        $this->dependencies = $dependencies;
-    }
-
-
-    /**
-     * @since 4.9.62.p
-     * @return bool
-     */
-    public function hasDependencies()
-    {
-        return count($this->dependencies) > 0;
-    }
-
-
-    /**
-     * @return string
-     */
-    public function source()
-    {
-        return $this->source;
-    }
-
-
-    /**
-     * @param string $source
-     * @throws InvalidDataTypeException
-     */
-    private function setSource($source)
-    {
-        if (! is_string($source)) {
-            throw new InvalidDataTypeException(
-                '$source',
-                $source,
-                'string'
-            );
-        }
-        $this->source = $source;
-    }
-
-
-    /**
-     * @return string
-     * @throws InvalidDataTypeException
-     * @throws DomainException
-     */
-    public function version()
-    {
-        return $this->version;
-    }
-
-
-    /**
-     * @param string $version
-     * @param bool   $fluent
-     * @return BrowserAsset|null
-     * @throws DomainException
-     * @throws InvalidDataTypeException
-     */
-    public function setVersion($version, $fluent = true)
-    {
-        // if version is NOT set and this asset was NOT built for distribution,
-        // then set the version equal to the EE core plugin version
-        if (empty($version) && ! $this->isBuiltDistributionSource()) {
-            $version = $this->domain->version();
-        }
-        if (! is_string($version)) {
-            throw new InvalidDataTypeException(
-                '$version',
-                $version,
-                'string'
-            );
-        }
-        $this->version = $version;
-        if ($fluent) {
-            return $this;
-        }
-        return null;
-    }
-
-
-    /**
-     * @return bool
-     */
-    public function isBuiltDistributionSource() {
-        return substr($this->source, -8) === Asset::FILE_EXTENSION_DISTRIBUTION_JS
-               || substr($this->source, -9) === Asset::FILE_EXTENSION_DISTRIBUTION_CSS;
-    }
+	/**
+	 * @var array $attributes
+	 */
+	private $attributes = [];
+
+	/**
+	 * @var array $allowed_attributes
+	 */
+	private static $allowed_attributes = [
+		Asset::TYPE_CSS => [
+			'crossorigin',
+			'media',
+			'referrerpolicy',
+			'sizes',
+			'type',
+		],
+		Asset::TYPE_JS => [
+			'async',
+			'charset',
+			'crossorigin',
+			'defer',
+			'type',
+		]
+	];
+
+	/**
+	 * @var array $dependencies
+	 */
+	private $dependencies;
+
+	/**
+	 * @var string $source
+	 */
+	private $source;
+
+	/**
+	 * @var string $version
+	 */
+	private $version;
+
+
+	/**
+	 * Asset constructor.
+	 *
+	 * @param string          $type
+	 * @param string          $handle
+	 * @param string          $source
+	 * @param array           $dependencies
+	 * @param DomainInterface $domain
+	 * @param string          $version
+	 * @throws DomainException
+	 * @throws InvalidDataTypeException
+	 */
+	public function __construct($type, $handle, $source, array $dependencies, DomainInterface $domain, $version = '')
+	{
+		parent::__construct($type, $handle, $domain);
+		$this->setSource($source);
+		$this->setDependencies($dependencies);
+		$this->setVersion($version, false);
+	}
+
+
+	/**
+	 * @since 4.9.62.p
+	 */
+	abstract public function enqueueAsset();
+
+
+	/**
+	 * @return array
+	 */
+	public function getAttributes()
+	{
+		return $this->attributes;
+	}
+
+
+	/**
+	 * @param array $attributes
+	 * @throws DomainException
+	 * @since 5.0.0.p
+	 */
+	public function addAttributes(array $attributes)
+	{
+		if (empty($attributes)) {
+			throw new DomainException(
+				esc_html__('The attributes array needs at least one value.', 'event_espresso')
+			);
+		}
+		foreach ($attributes as $key => $value) {
+			if (is_int($key) && $this->validateAttribute($value)) {
+				$this->attributes[] = $value;
+			} else if ($this->validateAttribute($key)) {
+				$this->attributes[ $key ] = $value;
+			}
+		}
+	}
+
+
+	/**
+	 * @param string $attribute
+	 * @return bool
+	 * @throws DomainException
+	 * @since 5.0.0.p
+	 */
+	private function validateAttribute($attribute)
+	{
+		$allowed = BrowserAsset::$allowed_attributes[ $this->type() ];
+		if (! in_array($attribute, $allowed, true)) {
+			throw new DomainException(
+				sprintf(
+					esc_html__('Invalid attribute! The only allowed attributes are: "%1$s"', 'event_espresso'),
+					implode('", "', $allowed)
+				)
+			);
+		}
+		return true;
+	}
+
+
+	/**
+	 * @return array
+	 */
+	public function dependencies()
+	{
+		return $this->dependencies;
+	}
+
+
+	/**
+	 * @param array $dependencies
+	 */
+	public function addDependencies(array $dependencies)
+	{
+		$this->dependencies = array_merge($this->dependencies, $dependencies);
+	}
+
+
+	/**
+	 * @param array $dependencies
+	 */
+	protected function setDependencies(array $dependencies)
+	{
+		$this->dependencies = $dependencies;
+	}
+
+
+	/**
+	 * @since 4.9.62.p
+	 * @return bool
+	 */
+	public function hasDependencies()
+	{
+		return count($this->dependencies) > 0;
+	}
+
+
+	/**
+	 * @return string
+	 */
+	public function source()
+	{
+		return $this->source;
+	}
+
+
+	/**
+	 * @param string $source
+	 * @throws InvalidDataTypeException
+	 */
+	private function setSource($source)
+	{
+		if (! is_string($source)) {
+			throw new InvalidDataTypeException(
+				'$source',
+				$source,
+				'string'
+			);
+		}
+		$this->source = $source;
+	}
+
+
+	/**
+	 * @return string
+	 * @throws InvalidDataTypeException
+	 * @throws DomainException
+	 */
+	public function version()
+	{
+		return $this->version;
+	}
+
+
+	/**
+	 * @param string $version
+	 * @param bool   $fluent
+	 * @return BrowserAsset|null
+	 * @throws DomainException
+	 * @throws InvalidDataTypeException
+	 */
+	public function setVersion($version, $fluent = true)
+	{
+		// if version is NOT set and this asset was NOT built for distribution,
+		// then set the version equal to the EE core plugin version
+		if (empty($version) && ! $this->isBuiltDistributionSource()) {
+			$version = $this->domain->version();
+		}
+		if (! is_string($version)) {
+			throw new InvalidDataTypeException(
+				'$version',
+				$version,
+				'string'
+			);
+		}
+		$this->version = $version;
+		if ($fluent) {
+			return $this;
+		}
+		return null;
+	}
+
+
+	/**
+	 * @return bool
+	 */
+	public function isBuiltDistributionSource() {
+		return substr($this->source, -8) === Asset::FILE_EXTENSION_DISTRIBUTION_JS
+			   || substr($this->source, -9) === Asset::FILE_EXTENSION_DISTRIBUTION_CSS;
+	}
 }