pictcode / lib / Cake / Controller / Component.php @ 0b1b8047
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| 1 | 635eef61 | spyder1211 | <?php
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| 2 | /**
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| 3 | * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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| 4 | * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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| 5 | *
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| 6 | * Licensed under The MIT License
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| 7 | * For full copyright and license information, please see the LICENSE.txt
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| 8 | * Redistributions of files must retain the above copyright notice.
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| 9 | *
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| 10 | * @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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| 11 | * @link http://cakephp.org CakePHP(tm) Project
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| 12 | * @package Cake.Controller
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| 13 | * @since CakePHP(tm) v 1.2
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| 14 | * @license http://www.opensource.org/licenses/mit-license.php MIT License
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| 15 | */
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| 16 | |||
| 17 | App::uses('ComponentCollection', 'Controller'); |
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| 18 | |||
| 19 | /**
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| 20 | * Base class for an individual Component. Components provide reusable bits of
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| 21 | * controller logic that can be composed into a controller. Components also
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| 22 | * provide request life-cycle callbacks for injecting logic at specific points.
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| 23 | *
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| 24 | * ## Life cycle callbacks
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| 25 | *
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| 26 | * Components can provide several callbacks that are fired at various stages of the request
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| 27 | * cycle. The available callbacks are:
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| 28 | *
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| 29 | * - `initialize()` - Fired before the controller's beforeFilter method.
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| 30 | * - `startup()` - Fired after the controller's beforeFilter method.
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| 31 | * - `beforeRender()` - Fired before the view + layout are rendered.
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| 32 | * - `shutdown()` - Fired after the action is complete and the view has been rendered
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| 33 | * but before Controller::afterFilter().
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| 34 | * - `beforeRedirect()` - Fired before a redirect() is done.
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| 35 | *
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| 36 | * @package Cake.Controller
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| 37 | * @link http://book.cakephp.org/2.0/en/controllers/components.html
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| 38 | * @see Controller::$components
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| 39 | */
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| 40 | class Component extends Object { |
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| 41 | |||
| 42 | /**
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| 43 | * Component collection class used to lazy load components.
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| 44 | *
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| 45 | * @var ComponentCollection
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| 46 | */
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| 47 | protected $_Collection; |
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| 48 | |||
| 49 | /**
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| 50 | * Settings for this Component
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| 51 | *
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| 52 | * @var array
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| 53 | */
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| 54 | public $settings = array(); |
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| 55 | |||
| 56 | /**
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| 57 | * Other Components this component uses.
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| 58 | *
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| 59 | * @var array
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| 60 | */
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| 61 | public $components = array(); |
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| 62 | |||
| 63 | /**
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| 64 | * A component lookup table used to lazy load component objects.
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| 65 | *
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| 66 | * @var array
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| 67 | */
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| 68 | protected $_componentMap = array(); |
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| 69 | |||
| 70 | /**
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| 71 | * Constructor
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| 72 | *
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| 73 | * @param ComponentCollection $collection A ComponentCollection this component can use to lazy load its components
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| 74 | * @param array $settings Array of configuration settings.
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| 75 | */
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| 76 | public function __construct(ComponentCollection $collection, $settings = array()) { |
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| 77 | $this->_Collection = $collection; |
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| 78 | $this->settings = $settings; |
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| 79 | $this->_set($settings); |
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| 80 | if (!empty($this->components)) { |
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| 81 | $this->_componentMap = ComponentCollection::normalizeObjectArray($this->components); |
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| 82 | } |
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| 83 | } |
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| 84 | |||
| 85 | /**
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| 86 | * Magic method for lazy loading $components.
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| 87 | *
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| 88 | * @param string $name Name of component to get.
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| 89 | * @return mixed A Component object or null.
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| 90 | */
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| 91 | public function __get($name) { |
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| 92 | if (isset($this->_componentMap[$name]) && !isset($this->{$name})) { |
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| 93 | $settings = array('enabled' => false) + (array)$this->_componentMap[$name]['settings']; |
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| 94 | $this->{$name} = $this->_Collection->load($this->_componentMap[$name]['class'], $settings); |
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| 95 | } |
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| 96 | if (isset($this->{$name})) { |
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| 97 | return $this->{$name}; |
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| 98 | } |
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| 99 | } |
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| 100 | |||
| 101 | /**
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| 102 | * Called before the Controller::beforeFilter().
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| 103 | *
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| 104 | * @param Controller $controller Controller with components to initialize
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| 105 | * @return void
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| 106 | * @link http://book.cakephp.org/2.0/en/controllers/components.html#Component::initialize
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| 107 | */
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| 108 | public function initialize(Controller $controller) { |
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| 109 | } |
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| 110 | |||
| 111 | /**
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| 112 | * Called after the Controller::beforeFilter() and before the controller action
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| 113 | *
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| 114 | * @param Controller $controller Controller with components to startup
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| 115 | * @return void
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| 116 | * @link http://book.cakephp.org/2.0/en/controllers/components.html#Component::startup
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| 117 | */
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| 118 | public function startup(Controller $controller) { |
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| 119 | } |
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| 120 | |||
| 121 | /**
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| 122 | * Called before the Controller::beforeRender(), and before
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| 123 | * the view class is loaded, and before Controller::render()
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| 124 | *
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| 125 | * @param Controller $controller Controller with components to beforeRender
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| 126 | * @return void
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| 127 | * @link http://book.cakephp.org/2.0/en/controllers/components.html#Component::beforeRender
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| 128 | */
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| 129 | public function beforeRender(Controller $controller) { |
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| 130 | } |
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| 131 | |||
| 132 | /**
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| 133 | * Called after Controller::render() and before the output is printed to the browser.
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| 134 | *
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| 135 | * @param Controller $controller Controller with components to shutdown
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| 136 | * @return void
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| 137 | * @link http://book.cakephp.org/2.0/en/controllers/components.html#Component::shutdown
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| 138 | */
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| 139 | public function shutdown(Controller $controller) { |
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| 140 | } |
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| 141 | |||
| 142 | /**
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| 143 | * Called before Controller::redirect(). Allows you to replace the URL that will
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| 144 | * be redirected to with a new URL. The return of this method can either be an array or a string.
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| 145 | *
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| 146 | * If the return is an array and contains a 'url' key. You may also supply the following:
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| 147 | *
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| 148 | * - `status` The status code for the redirect
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| 149 | * - `exit` Whether or not the redirect should exit.
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| 150 | *
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| 151 | * If your response is a string or an array that does not contain a 'url' key it will
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| 152 | * be used as the new URL to redirect to.
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| 153 | *
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| 154 | * @param Controller $controller Controller with components to beforeRedirect
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| 155 | * @param string|array $url Either the string or URL array that is being redirected to.
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| 156 | * @param int $status The status code of the redirect
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| 157 | * @param bool $exit Will the script exit.
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| 158 | * @return array|null Either an array or null.
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| 159 | * @link http://book.cakephp.org/2.0/en/controllers/components.html#Component::beforeRedirect
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| 160 | */
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| 161 | public function beforeRedirect(Controller $controller, $url, $status = null, $exit = true) { |
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| 162 | } |
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| 163 | |||
| 164 | } |