Complex classes like Base_Admin_Menu often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use Base_Admin_Menu, and based on these observations, apply Extract Interface, too.
1 | <?php |
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15 | abstract class Base_Admin_Menu { |
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16 | /** |
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17 | * Holds class instances. |
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18 | * |
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19 | * @var array |
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20 | */ |
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21 | protected static $instances; |
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22 | |||
23 | /** |
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24 | * Whether the current request is a REST API request. |
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25 | * |
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26 | * @var bool |
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27 | */ |
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28 | protected $is_api_request = false; |
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29 | |||
30 | /** |
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31 | * Domain of the current site. |
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32 | * |
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33 | * @var string |
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34 | */ |
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35 | protected $domain; |
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36 | |||
37 | /** |
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38 | * The CSS classes used to hide the submenu items in navigation. |
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39 | * |
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40 | * @var string |
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41 | */ |
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42 | const HIDE_CSS_CLASS = 'hide-if-js'; |
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43 | |||
44 | /** |
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45 | * Base_Admin_Menu constructor. |
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46 | */ |
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47 | protected function __construct() { |
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60 | |||
61 | /** |
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62 | * Determine if the current request is from API |
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63 | */ |
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64 | public function set_is_api_request() { |
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70 | |||
71 | /** |
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72 | * Returns class instance. |
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73 | * |
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74 | * @return Admin_Menu |
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75 | */ |
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76 | public static function get_instance() { |
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85 | |||
86 | /** |
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87 | * Sets up class properties for REST API requests. |
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88 | * |
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89 | * @param \WP_REST_Response $response Response from the endpoint. |
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90 | */ |
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91 | public function rest_api_init( $response ) { |
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96 | |||
97 | /** |
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98 | * Updates the menu data of the given menu slug. |
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99 | * |
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100 | * @param string $slug Slug of the menu to update. |
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101 | * @param string $url New menu URL. |
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102 | * @param string $title New menu title. |
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103 | * @param string $cap New menu capability. |
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104 | * @param string $icon New menu icon. |
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105 | * @param int $position New menu position. |
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106 | * @return bool Whether the menu has been updated. |
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107 | */ |
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108 | public function update_menu( $slug, $url = null, $title = null, $cap = null, $icon = null, $position = null ) { |
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163 | |||
164 | /** |
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165 | * Updates the submenus of the given menu slug. |
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166 | * |
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167 | * It hides the menu by adding the `hide-if-js` css class and duplicates the submenu with the new slug. |
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168 | * |
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169 | * @param string $slug Menu slug. |
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170 | * @param array $submenus_to_update Array of new submenu slugs. |
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171 | */ |
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172 | public function update_submenus( $slug, $submenus_to_update ) { |
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222 | |||
223 | /** |
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224 | * Adds a menu separator. |
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225 | * |
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226 | * @param int $position The position in the menu order this item should appear. |
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227 | * @param string $cap Optional. The capability required for this menu to be displayed to the user. |
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228 | * Default: 'read'. |
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229 | */ |
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230 | public function add_admin_menu_separator( $position = null, $cap = 'read' ) { |
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241 | |||
242 | /** |
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243 | * Enqueues scripts and styles. |
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244 | */ |
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245 | public function enqueue_scripts() { |
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276 | |||
277 | /** |
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278 | * Mark the core colors stylesheets as RTL depending on the value from the environment. |
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279 | * This fixes a core issue where the extra RTL data is not added to the colors stylesheet. |
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280 | * https://core.trac.wordpress.org/ticket/53090 |
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281 | */ |
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282 | public function configure_colors_for_rtl_stylesheets() { |
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285 | |||
286 | /** |
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287 | * Injects inline-styles for site icon for when third-party plugins remove enqueued stylesheets. |
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288 | * Unable to use wp_add_inline_style as plugins remove styles from all non-standard handles |
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289 | */ |
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290 | public function set_site_icon_inline_styles() { |
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299 | |||
300 | /** |
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301 | * Hide the submenu page based on slug and return the item that was hidden. |
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302 | * |
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303 | * Instead of actually removing the submenu item, a safer approach is to hide it and filter it in the API response. |
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304 | * In this manner we'll avoid breaking third-party plugins depending on items that no longer exist. |
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305 | * |
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306 | * A false|array value is returned to be consistent with remove_submenu_page() function |
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307 | * |
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308 | * @param string $menu_slug The parent menu slug. |
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309 | * @param string $submenu_slug The submenu slug that should be hidden. |
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310 | * @return false|array |
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311 | */ |
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312 | public function hide_submenu_page( $menu_slug, $submenu_slug ) { |
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331 | |||
332 | /** |
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333 | * Apply the hide-if-js CSS class to a submenu item. |
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334 | * |
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335 | * @param int $index The position of a submenu item in the submenu array. |
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336 | * @param string $parent_slug The parent slug. |
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337 | * @param array $item The submenu item. |
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338 | */ |
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339 | public function hide_submenu_element( $index, $parent_slug, $item ) { |
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347 | |||
348 | /** |
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349 | * Check if the menu has submenu items visible |
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350 | * |
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351 | * @param array $submenu_items The submenu items. |
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352 | * @return bool |
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353 | */ |
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354 | public function has_visible_items( $submenu_items ) { |
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362 | |||
363 | /** |
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364 | * Return the number of existing submenu items under the supplied parent slug. |
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365 | * |
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366 | * @param string $parent_slug The slug of the parent menu. |
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367 | * @return int The number of submenu items under $parent_slug. |
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368 | */ |
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369 | public function get_submenu_item_count( $parent_slug ) { |
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378 | |||
379 | /** |
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380 | * Adds the given menu item in the specified position. |
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381 | * |
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382 | * @param array $item The menu item to add. |
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383 | * @param int $position The position in the menu order this item should appear. |
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384 | */ |
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385 | public function set_menu_item( $item, $position = null ) { |
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399 | |||
400 | /** |
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401 | * Determines whether the current locale is right-to-left (RTL). |
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402 | */ |
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403 | public function is_rtl() { |
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406 | |||
407 | /** |
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408 | * Checks for any SVG icons in the menu, and overrides things so that |
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409 | * we can display the icon in the correct colour for the theme. |
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410 | */ |
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411 | public function override_svg_icons() { |
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470 | |||
471 | /** |
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472 | * Hide menus that are unauthorized and don't have visible submenus and cases when the menu has the same slug |
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473 | * as the first submenu item. |
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474 | * |
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475 | * This must be done at the end of menu and submenu manipulation in order to avoid performing this check each time |
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476 | * the submenus are altered. |
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477 | */ |
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478 | public function hide_parent_of_hidden_submenus() { |
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510 | |||
511 | /** |
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512 | * Sort the hidden submenus by moving them at the end of the array in order to avoid WP using them as default URLs. |
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513 | * |
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514 | * This operation has to be done at the end of submenu manipulation in order to guarantee that the hidden submenus |
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515 | * are at the end of the array. |
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516 | */ |
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517 | public function sort_hidden_submenus() { |
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532 | |||
533 | /** |
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534 | * Check if the given item is visible or not in the admin menu. |
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535 | * |
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536 | * @param array $item A menu or submenu array. |
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537 | */ |
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538 | public function is_item_visible( $item ) { |
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541 | |||
542 | /** |
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543 | * Whether to use wp-admin pages rather than Calypso. |
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544 | * |
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545 | * Options: |
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546 | * false - Calypso (Default). |
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547 | * true - wp-admin. |
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548 | * |
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549 | * @return bool |
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550 | */ |
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551 | abstract public function should_link_to_wp_admin(); |
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552 | |||
553 | /** |
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554 | * Create the desired menu output. |
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555 | */ |
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556 | abstract public function reregister_menu_items(); |
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557 | } |
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558 |
This check looks for
@param
annotations where the type inferred by our type inference engine differs from the declared type.It makes a suggestion as to what type it considers more descriptive.
Most often this is a case of a parameter that can be null in addition to its declared types.