CMSMenu::remove_menu_item()   A
last analyzed

Complexity

Conditions 1
Paths 1

Size

Total Lines 3
Code Lines 1

Duplication

Lines 0
Ratio 0 %

Importance

Changes 1
Bugs 0 Features 0
Metric Value
cc 1
eloc 1
c 1
b 0
f 0
nc 1
nop 1
dl 0
loc 3
rs 10
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<?php
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namespace LeKoala\Admini;
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use SilverStripe\Core\ClassInfo;
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use SilverStripe\Core\Config\Config;
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use SilverStripe\Core\Convert;
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use SilverStripe\Core\Manifest\ClassLoader;
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use SilverStripe\Control\Controller;
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use SilverStripe\Dev\TestOnly;
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use SilverStripe\i18n\i18nEntityProvider;
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use SilverStripe\Security\Member;
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use IteratorAggregate;
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use ReflectionClass;
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use ArrayIterator;
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use SilverStripe\Security\Security;
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use Traversable;
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/**
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 * The object manages the main CMS menu. See {@link LeftAndMain::init()} for
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 * example usage.
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 *
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 * The menu will be automatically populated with menu items for subclasses of
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 * {@link LeftAndMain}. That is, for each class in the CMS that creates an
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 * administration panel, a CMS menu item will be created. The default
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 * configuration will also include a 'help' link to the SilverStripe user
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 * documentation.
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 *
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 * Additional CMSMenu items can be added through {@link LeftAndMainExtension::init()}
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 * extensions added to {@link LeftAndMain}.
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 */
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class CMSMenu implements IteratorAggregate, i18nEntityProvider
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{
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    /**
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     * Sort by menu priority, highest to lowest
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     */
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    const MENU_PRIORITY = 'menu_priority';
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    /**
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     * Sort by url priority, highest to lowest
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     */
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    const URL_PRIORITY = 'url_priority';
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    /**
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     * An array of changes to be made to the menu items, in the order that the changes should be
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     * applied.  Each item is a map in one of the two forms:
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     *  - array('type' => 'add', 'item' => CMSMenuItem::create(...) )
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     *  - array('type' => 'remove', 'code' => 'codename' )
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     */
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    protected static $menu_item_changes = array();
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    /**
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     * Set to true if clear_menu() is called, to indicate that the default menu shouldn't be
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     * included
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     */
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    protected static $menu_is_cleared = false;
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    /**
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     * Generate CMS main menu items by collecting valid
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     * subclasses of {@link LeftAndMain}
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     */
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    public static function populate_menu()
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    {
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        self::$menu_is_cleared = false;
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    }
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    /**
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     * Add a LeftAndMain controller to the CMS menu.
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     *
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     * @param string $controllerClass The class name of the controller
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     * @todo A director rule is added when a controller link is added, but it won't be removed
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     *          when the item is removed. Functionality needed in {@link Director}.
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     */
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    public static function add_controller($controllerClass)
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    {
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        if ($menuItem = self::menuitem_for_controller($controllerClass)) {
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            $code = static::get_menu_code($controllerClass);
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            self::add_menu_item_obj($code, $menuItem);
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        }
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    }
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    /**
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     * Return a CMSMenuItem to add the given controller to the CMSMenu
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     *
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     * @param string $controllerClass
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     * @return CMSMenuItem
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     */
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    protected static function menuitem_for_controller($controllerClass)
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    {
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        $urlBase = AdminiRootController::admin_url();
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        $urlSegment   = Config::inst()->get($controllerClass, 'url_segment');
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        $menuPriority = Config::inst()->get($controllerClass, 'menu_priority');
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        $ignoreFromMenu = Config::inst()->get($controllerClass, 'ignore_menuitem');
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        // Don't add menu items defined the old way, or for controllers that are set to be ignored
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        if (!$urlSegment || $ignoreFromMenu) {
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            return null;
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        }
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        $link = Controller::join_links($urlBase, $urlSegment) . '/';
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        // doesn't work if called outside of a controller context (e.g. in _config.php)
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        // as the locale won't be detected properly. Use {@link LeftAndMain->MainMenu()} to update
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        // titles for existing menu entries
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        $menuTitle = LeftAndMain::menu_title($controllerClass);
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        return CMSMenuItem::create($menuTitle, $link, $controllerClass, $menuPriority);
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    }
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    /**
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     * Add an arbitrary URL to the CMS menu.
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     *
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     * @param string $code A unique identifier (used to create a CSS ID and its key in {@link $menu_items})
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     * @param string $menuTitle The link's title in the CMS menu
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     * @param string $url The url of the link
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     * @param integer $priority The menu priority (sorting order) of the menu item.  Higher priorities will be further
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     *                          left.
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     * @param array $attributes an array of attributes to include on the link.
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     * @param string $iconClass
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     *
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     * @return boolean The result of the operation.
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     */
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    public static function add_link($code, $menuTitle, $url, $priority = -1, $attributes = null, $iconClass = null)
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    {
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        return self::add_menu_item($code, $menuTitle, $url, null, $priority, $attributes, $iconClass);
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    }
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    /**
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     * Add a navigation item to the main administration menu showing in the top bar.
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     *
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     * uses {@link CMSMenu::$menu_items}
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     *
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     * @param string $code Unique identifier for this menu item (e.g. used by {@link replace_menu_item()} and
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     *                    {@link remove_menu_item}. Also used as a CSS-class for icon customization.
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     * @param string $menuTitle Localized title showing in the menu bar
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     * @param string $url A relative URL that will be linked in the menu bar.
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     * @param string $controllerClass The controller class for this menu, used to check permisssions.
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     *                    If blank, it's assumed that this is public, and always shown to users who
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     *                    have the rights to access some other part of the admin area.
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     * @param int $priority
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     * @param array $attributes an array of attributes to include on the link.
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     * @param string $iconClass
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     *
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     * @return bool Success
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     */
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    public static function add_menu_item(
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        $code,
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        $menuTitle,
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        $url,
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        $controllerClass = null,
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        $priority = -1,
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        $attributes = null,
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        $iconClass = null
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    ) {
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        // If a class is defined, then force the use of that as a code.  This helps prevent menu item duplication
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        if ($controllerClass) {
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            $code = self::get_menu_code($controllerClass);
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        }
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        return self::replace_menu_item(
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            $code,
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            $menuTitle,
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            $url,
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            $controllerClass,
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            $priority,
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            $attributes,
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            $iconClass
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        );
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    }
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    /**
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     * Get a single menu item by its code value.
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     *
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     * @param string $code
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     * @return array|null
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     */
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    public static function get_menu_item($code)
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    {
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        $menuItems = self::get_menu_items();
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        return (isset($menuItems[$code])) ? $menuItems[$code] : null;
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    }
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    /**
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     * Get menu code for class
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     *
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     * @param string $cmsClass Controller class name
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     * @return string
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     */
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    public static function get_menu_code($cmsClass)
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    {
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        return Convert::raw2htmlname(str_replace('\\', '-', $cmsClass));
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    }
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    /**
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     * Get all menu entries.
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     *
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     * @return array
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     */
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    public static function get_menu_items()
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    {
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        $menuItems = array();
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        // Set up default menu items
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        if (!self::$menu_is_cleared) {
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            $cmsClasses = self::get_cms_classes();
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            foreach ($cmsClasses as $cmsClass) {
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                $menuItem = self::menuitem_for_controller($cmsClass);
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                $menuCode = self::get_menu_code($cmsClass);
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                if ($menuItem) {
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                    $menuItems[$menuCode] = $menuItem;
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                }
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            }
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        }
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        // Apply changes
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        foreach (self::$menu_item_changes as $change) {
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            switch ($change['type']) {
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                case 'add':
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                    $menuItems[$change['code']] = $change['item'];
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                    break;
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                case 'remove':
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                    unset($menuItems[$change['code']]);
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                    break;
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                default:
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                    user_error("Bad menu item change type {$change['type']}", E_USER_WARNING);
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            }
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        }
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        // Sort menu items according to priority, then title asc
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        $menuPriority = array();
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        $menuTitle    = array();
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        foreach ($menuItems as $key => $menuItem) {
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            $menuPriority[$key] = is_numeric($menuItem->priority) ? $menuItem->priority : 0;
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            $menuTitle[$key]    = $menuItem->title;
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        }
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        array_multisort($menuPriority, \SORT_DESC, $menuTitle, \SORT_ASC, $menuItems);
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        return $menuItems;
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    }
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    /**
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     * Get all menu items that the passed member can view.
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     * Defaults to {@link Security::getCurrentUser()}.
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     *
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     * @param Member $member
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     * @return array
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     */
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    public static function get_viewable_menu_items($member = null)
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    {
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        if (!$member && $member !== false) {
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            $member = Security::getCurrentUser();
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        }
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        $viewableMenuItems = array();
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        $allMenuItems = self::get_menu_items();
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        if ($allMenuItems) {
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            foreach ($allMenuItems as $code => $menuItem) {
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                // exclude all items which have a controller to perform permission checks on
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                if ($menuItem->controller) {
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                    $controllerObj = singleton($menuItem->controller);
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                    if (Controller::has_curr()) {
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                        // Necessary for canView() to have request data available,
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                        // e.g. to check permissions against LeftAndMain->currentPage()
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                        $controllerObj->setRequest(Controller::curr()->getRequest());
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                        if (!$controllerObj->canView($member)) {
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                            continue;
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                        }
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                    }
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                }
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                $viewableMenuItems[$code] = $menuItem;
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            }
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        }
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        return $viewableMenuItems;
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    }
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    /**
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     * Removes an existing item from the menu.
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     *
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     * @param string $code Unique identifier for this menu item
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     */
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    public static function remove_menu_item($code)
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    {
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        self::$menu_item_changes[] = array('type' => 'remove', 'code' => $code);
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    }
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    /**
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     * Remove menu item by class name.
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     *
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     * @param string $className Name of class
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     */
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    public static function remove_menu_class($className)
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    {
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        $code = self::get_menu_code($className);
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        self::remove_menu_item($code);
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    }
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    /**
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     * Clears the entire menu
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     */
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    public static function clear_menu()
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    {
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        self::$menu_item_changes = array();
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        self::$menu_is_cleared = true;
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    }
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    /**
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     * Replace a navigation item to the main administration menu showing in the top bar.
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     *
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     * @param string $code Unique identifier for this menu item (e.g. used by {@link replace_menu_item()} and
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     *                    {@link remove_menu_item}. Also used as a CSS-class for icon customization.
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     * @param string $menuTitle Localized title showing in the menu bar
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     * @param string $url A relative URL that will be linked in the menu bar.
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     *                    Make sure to add a matching route via {@link Director::$rules} to this url.
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     * @param string $controllerClass The controller class for this menu, used to check permisssions.
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     *                    If blank, it's assumed that this is public, and always shown to users who
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     *                    have the rights to access some other part of the admin area.
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     * @param int $priority
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     * @param array $attributes an array of attributes to include on the link.
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     * @param string $iconClass
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     *
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     * @return bool Success
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     */
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    public static function replace_menu_item(
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        $code,
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        $menuTitle,
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        $url,
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        $controllerClass = null,
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        $priority = -1,
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        $attributes = null,
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        $iconClass = null
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    ) {
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        $item = CMSMenuItem::create($menuTitle, $url, $controllerClass, $priority, $iconClass);
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        if ($attributes) {
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            $item->setAttributes($attributes);
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        }
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        self::$menu_item_changes[] = array(
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            'type' => 'add',
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            'code' => $code,
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            'item' => $item,
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        );
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    }
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    /**
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     * Add a previously built menu item object to the menu
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     *
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     * @param string $code
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     * @param CMSMenuItem $cmsMenuItem
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     */
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    protected static function add_menu_item_obj($code, $cmsMenuItem)
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    {
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        self::$menu_item_changes[] = array(
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            'type' => 'add',
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            'code' => $code,
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            'item' => $cmsMenuItem,
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        );
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    }
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    /**
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     * A utility funciton to retrieve subclasses of a given class that
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     * are instantiable (ie, not abstract) and have a valid menu title.
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     *
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     * Sorted by url_priority config.
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     *
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     * @todo A variation of this function could probably be moved to {@link ClassInfo}
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     * @param string $root The root class to begin finding subclasses
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     * @param boolean $recursive Look for subclasses recursively?
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     * @param string $sort Name of config on which to sort. Can be 'menu_priority' or 'url_priority'
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     * @return array Valid, unique subclasses
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     */
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    public static function get_cms_classes($root = null, $recursive = true, $sort = self::MENU_PRIORITY)
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    {
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        if (!$root) {
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            $root = LeftAndMain::class;
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        }
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        $abstractClasses = [LeftAndMain::class];
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        $subClasses = array_values(ClassInfo::subclassesFor($root));
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        foreach ($subClasses as $className) {
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            if ($recursive && $className != $root) {
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                $subClasses = array_merge($subClasses, array_values(ClassInfo::subclassesFor($className)));
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            }
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        }
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        $subClasses = array_unique($subClasses);
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        foreach ($subClasses as $key => $className) {
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            // Remove test & abstract classes
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            if (in_array($className, $abstractClasses) || ClassInfo::classImplements($className, TestOnly::class)) {
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                unset($subClasses[$key]);
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            } else {
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                // Separate conditional to avoid autoloading the class
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                $classReflection = new ReflectionClass($className);
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                if (!$classReflection->isInstantiable()) {
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                    unset($subClasses[$key]);
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                }
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            }
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        }
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        // Sort by specified sorting config
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        usort($subClasses, function ($a, $b) use ($sort) {
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            $priorityA = Config::inst()->get($a, $sort);
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            $priorityB = Config::inst()->get($b, $sort);
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            return $priorityB - $priorityA;
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        });
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        return $subClasses;
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    }
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    /**
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     * IteratorAggregate Interface Method.  Iterates over the menu items.
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     */
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    public function getIterator(): Traversable
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    {
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        return new ArrayIterator(self::get_menu_items());
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    }
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    /**
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     * Provide menu titles to the i18n entity provider
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     */
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    public function provideI18nEntities()
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    {
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        $cmsClasses = self::get_cms_classes();
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        $entities = array();
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        foreach ($cmsClasses as $cmsClass) {
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            $defaultTitle = LeftAndMain::menu_title($cmsClass, false);
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            $ownerModule = ClassLoader::inst()->getManifest()->getOwnerModule($cmsClass);
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            $entities["{$cmsClass}.MENUTITLE"] = [
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                'default' => $defaultTitle,
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                'module' => $ownerModule->getShortName()
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            ];
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        }
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        return $entities;
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    }
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}
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