mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-07-06 11:29:27 +02:00
2d0a354405
Currently help menu item is the only external link in the CMS and the ability for it to work is hardcoded in the template. This request makes the target attribute definable by CMSMenu::add_link(). Adds documentation for how to add a basic external link to the CMS.
318 lines
11 KiB
PHP
318 lines
11 KiB
PHP
<?php
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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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* @package framework
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* @subpackage admin
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*/
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class CMSMenu extends Object implements IteratorAggregate, i18nEntityProvider {
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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' => new CMSMenuItem(...) )
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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 $menu_is_cleared = false;
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/**
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* Generate CMS main menu items by collecting valid
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* subclasses of {@link LeftAndMain}
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*/
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public static function populate_menu() {
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self::$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 $controllerClass The class name of the controller
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* @return The result of the operation
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* @todo A director rule is added when a controller link is added, but it won't be removed
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* when the item is removed. Functionality needed in {@link Director}.
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*/
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public static function add_controller($controllerClass) {
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if($menuItem = self::menuitem_for_controller($controllerClass)) {
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self::add_menu_item_obj($controllerClass, $menuItem);
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}
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}
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/**
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* Return a CMSMenuItem to add the given controller to the CMSMenu
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*/
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protected static function menuitem_for_controller($controllerClass) {
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$urlBase = Config::inst()->get($controllerClass, 'url_base', Config::FIRST_SET);
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$urlSegment = Config::inst()->get($controllerClass, 'url_segment', Config::FIRST_SET);
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$menuPriority = Config::inst()->get($controllerClass, 'menu_priority', Config::FIRST_SET);
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// Don't add menu items defined the old way
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if($urlSegment === null && $controllerClass != "CMSMain") return;
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$link = Controller::join_links($urlBase, $urlSegment) . '/';
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// doesn't work if called outside of a controller context (e.g. in _config.php)
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// as the locale won't be detected properly. Use {@link LeftAndMain->MainMenu()} to update
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// titles for existing menu entries
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$defaultTitle = LeftAndMain::menu_title_for_class($controllerClass);
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$menuTitle = _t("{$controllerClass}.MENUTITLE", $defaultTitle);
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return new CMSMenuItem($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 $attributes an array of attributes to include on the link.
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*
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* @return boolean The result of the operation.
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*/
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public static function add_link($code, $menuTitle, $url, $priority = -1, $attributes = null) {
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return self::add_menu_item($code, $menuTitle, $url, null, $priority, $attributes);
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}
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/**
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* Add a navigation item to the main administration menu showing in the top bar.
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*
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* uses {@link CMSMenu::$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 array $attributes an array of attributes to include on the link.
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*
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* @return boolean Success
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*/
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public static function add_menu_item($code, $menuTitle, $url, $controllerClass = null, $priority = -1, $attributes = null) {
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// If a class is defined, then force the use of that as a code. This helps prevent menu item duplication
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if($controllerClass) {
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$code = $controllerClass;
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}
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return self::replace_menu_item($code, $menuTitle, $url, $controllerClass, $priority, $attributes);
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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 $code
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* @return array
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*/
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public static function get_menu_item($code) {
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$menuItems = self::get_menu_items();
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return (isset($menuItems[$code])) ? $menuItems[$code] : false;
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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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$menuItems = array();
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// Set up default menu items
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if(!self::$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($cmsClass);
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if($menuItem) $menuItems[$cmsClass] = $menuItem;
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}
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}
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// Apply changes
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foreach(self::$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 Member::currentUser()}.
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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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if(!$member && $member !== FALSE) {
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$member = Member::currentUser();
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}
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$viewableMenuItems = array();
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$allMenuItems = self::get_menu_items();
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if($allMenuItems) foreach($allMenuItems as $code => $menuItem) {
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// exclude all items which have a controller to perform permission
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// checks on
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if($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($member)) continue;
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}
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}
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$viewableMenuItems[$code] = $menuItem;
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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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self::$menu_item_changes[] = array('type' => 'remove', 'code' => $code);
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}
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/**
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* Clears the entire menu
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*/
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public static function clear_menu() {
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self::$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 array $attributes an array of attributes to include on the link.
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*
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* @return boolean Success
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*/
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public static function replace_menu_item($code, $menuTitle, $url, $controllerClass = null, $priority = -1, $attributes = null) {
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$item = new CMSMenuItem($menuTitle, $url, $controllerClass, $priority);
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if($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' => $item,
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);
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}
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/**
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* Add a previously built menu item object to the menu
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*/
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protected static function add_menu_item_obj($code, $cmsMenuItem) {
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self::$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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* @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 $recursive Look for subclasses recursively?
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* @return array Valid, unique subclasses
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*/
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public static function get_cms_classes($root = 'LeftAndMain', $recursive = true) {
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$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 abstract classes and LeftAndMain
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if('LeftAndMain' == $className || ClassInfo::classImplements($className, 'TestOnly')) {
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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(!$classReflection->isInstantiable()) unset($subClasses[$key]);
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}
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}
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return $subClasses;
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}
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/**
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* IteratorAggregate Interface Method. Iterates over the menu items.
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*/
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public function getIterator() {
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return new ArrayIterator(self::get_menu_items());
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}
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/**
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* Provide menu titles to the i18n entity provider
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*/
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public function provideI18nEntities() {
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$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_for_class($cmsClass);
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$ownerModule = i18n::get_owner_module($cmsClass);
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$entities["{$cmsClass}.MENUTITLE"] = array($defaultTitle, 'Menu title', $ownerModule);
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}
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return $entities;
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}
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}
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