141 lines
4.4 KiB
PHP
141 lines
4.4 KiB
PHP
<?php
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/**
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* Components collection is used as a registry for loaded components and handles loading
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* and constructing component class objects.
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*
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* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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* Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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*
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* Licensed under The MIT License
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* For full copyright and license information, please see the LICENSE.txt
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* Redistributions of files must retain the above copyright notice.
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*
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* @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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* @link http://cakephp.org CakePHP(tm) Project
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* @package Cake.Controller
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* @since CakePHP(tm) v 2.0
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* @license http://www.opensource.org/licenses/mit-license.php MIT License
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*/
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App::uses('ObjectCollection', 'Utility');
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App::uses('Component', 'Controller');
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App::uses('CakeEventListener', 'Event');
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/**
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* Components collection is used as a registry for loaded components and handles loading
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* and constructing component class objects.
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*
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* @package Cake.Controller
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*/
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class ComponentCollection extends ObjectCollection implements CakeEventListener {
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/**
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* The controller that this collection was initialized with.
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*
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* @var Controller
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*/
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protected $_Controller = null;
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/**
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* Initializes all the Components for a controller.
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* Attaches a reference of each component to the Controller.
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*
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* @param Controller $Controller Controller to initialize components for.
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* @return void
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*/
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public function init(Controller $Controller) {
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if (empty($Controller->components)) {
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return;
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}
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$this->_Controller = $Controller;
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$components = ComponentCollection::normalizeObjectArray($Controller->components);
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foreach ($components as $name => $properties) {
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$Controller->{$name} = $this->load($properties['class'], $properties['settings']);
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}
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}
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/**
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* Set the controller associated with the collection.
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*
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* @param Controller $Controller Controller to set
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* @return void
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*/
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public function setController(Controller $Controller) {
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$this->_Controller = $Controller;
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}
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/**
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* Get the controller associated with the collection.
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*
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* @return Controller Controller instance
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*/
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public function getController() {
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return $this->_Controller;
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}
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/**
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* Loads/constructs a component. Will return the instance in the registry if it already exists.
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* You can use `$settings['enabled'] = false` to disable callbacks on a component when loading it.
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* Callbacks default to on. Disabled component methods work as normal, only callbacks are disabled.
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*
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* You can alias your component as an existing component by setting the 'className' key, i.e.,
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* {{{
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* public $components = array(
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* 'Email' => array(
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* 'className' => 'AliasedEmail'
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* );
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* );
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* }}}
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* All calls to the `Email` component would use `AliasedEmail` instead.
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*
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* @param string $component Component name to load
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* @param array $settings Settings for the component.
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* @return Component A component object, Either the existing loaded component or a new one.
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* @throws MissingComponentException when the component could not be found
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*/
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public function load($component, $settings = array()) {
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if (isset($settings['className'])) {
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$alias = $component;
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$component = $settings['className'];
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}
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list($plugin, $name) = pluginSplit($component, true);
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if (!isset($alias)) {
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$alias = $name;
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}
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if (isset($this->_loaded[$alias])) {
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return $this->_loaded[$alias];
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}
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$componentClass = $name . 'Component';
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App::uses($componentClass, $plugin . 'Controller/Component');
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if (!class_exists($componentClass)) {
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throw new MissingComponentException(array(
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'class' => $componentClass,
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'plugin' => substr($plugin, 0, -1)
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));
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}
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$this->_loaded[$alias] = new $componentClass($this, $settings);
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$enable = isset($settings['enabled']) ? $settings['enabled'] : true;
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if ($enable) {
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$this->enable($alias);
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}
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return $this->_loaded[$alias];
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}
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/**
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* Returns the implemented events that will get routed to the trigger function
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* in order to dispatch them separately on each component
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*
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* @return array
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*/
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public function implementedEvents() {
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return array(
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'Controller.initialize' => array('callable' => 'trigger'),
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'Controller.startup' => array('callable' => 'trigger'),
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'Controller.beforeRender' => array('callable' => 'trigger'),
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'Controller.beforeRedirect' => array('callable' => 'trigger'),
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'Controller.shutdown' => array('callable' => 'trigger'),
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);
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}
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}
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