pictcode / lib / Cake / Core / CakePlugin.php @ 635eef61
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| 1 | 635eef61 | spyder1211 | <?php
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| 2 | /**
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| 3 | * CakePlugin class
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| 4 | *
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| 5 | * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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| 6 | * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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| 7 | *
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| 8 | * Licensed under The MIT License
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| 9 | * For full copyright and license information, please see the LICENSE.txt
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| 10 | * Redistributions of files must retain the above copyright notice.
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| 11 | *
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| 12 | * @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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| 13 | * @link http://cakephp.org CakePHP(tm) Project
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| 14 | * @package Cake.Core
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| 15 | * @since CakePHP(tm) v 2.0.0
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| 16 | * @license http://www.opensource.org/licenses/mit-license.php MIT License
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| 17 | */
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| 18 | |||
| 19 | /**
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| 20 | * CakePlugin is responsible for loading and unloading plugins. It also can
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| 21 | * retrieve plugin paths and load their bootstrap and routes files.
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| 22 | *
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| 23 | * @package Cake.Core
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| 24 | * @link http://book.cakephp.org/2.0/en/plugins.html
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| 25 | */
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| 26 | class CakePlugin { |
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| 27 | |||
| 28 | /**
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| 29 | * Holds a list of all loaded plugins and their configuration
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| 30 | *
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| 31 | * @var array
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| 32 | */
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| 33 | protected static $_plugins = array(); |
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| 34 | |||
| 35 | /**
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| 36 | * Loads a plugin and optionally loads bootstrapping, routing files or loads an initialization function
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| 37 | *
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| 38 | * Examples:
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| 39 | *
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| 40 | * `CakePlugin::load('DebugKit')`
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| 41 | *
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| 42 | * Will load the DebugKit plugin and will not load any bootstrap nor route files
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| 43 | *
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| 44 | * `CakePlugin::load('DebugKit', array('bootstrap' => true, 'routes' => true))`
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| 45 | *
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| 46 | * will load the bootstrap.php and routes.php files
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| 47 | *
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| 48 | * `CakePlugin::load('DebugKit', array('bootstrap' => false, 'routes' => true))`
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| 49 | *
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| 50 | * will load routes.php file but not bootstrap.php
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| 51 | *
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| 52 | * `CakePlugin::load('DebugKit', array('bootstrap' => array('config1', 'config2')))`
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| 53 | *
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| 54 | * will load config1.php and config2.php files
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| 55 | *
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| 56 | * `CakePlugin::load('DebugKit', array('bootstrap' => 'aCallableMethod'))`
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| 57 | *
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| 58 | * will run the aCallableMethod function to initialize it
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| 59 | *
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| 60 | * Bootstrap initialization functions can be expressed as a PHP callback type,
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| 61 | * including closures. Callbacks will receive two parameters
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| 62 | * (plugin name, plugin configuration)
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| 63 | *
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| 64 | * It is also possible to load multiple plugins at once. Examples:
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| 65 | *
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| 66 | * `CakePlugin::load(array('DebugKit', 'ApiGenerator'))`
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| 67 | *
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| 68 | * will load the DebugKit and ApiGenerator plugins
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| 69 | *
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| 70 | * `CakePlugin::load(array('DebugKit', 'ApiGenerator'), array('bootstrap' => true))`
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| 71 | *
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| 72 | * will load bootstrap file for both plugins
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| 73 | *
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| 74 | * ```
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| 75 | * CakePlugin::load(array(
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| 76 | * 'DebugKit' => array('routes' => true),
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| 77 | * 'ApiGenerator'
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| 78 | * ), array('bootstrap' => true))
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| 79 | * ```
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| 80 | *
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| 81 | * Will only load the bootstrap for ApiGenerator and only the routes for DebugKit.
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| 82 | * By using the `path` option you can specify an absolute path to the plugin. Make
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| 83 | * sure that the path is slash terminated or your plugin will not be located properly.
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| 84 | *
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| 85 | * @param string|array $plugin name of the plugin to be loaded in CamelCase format or array or plugins to load
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| 86 | * @param array $config configuration options for the plugin
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| 87 | * @throws MissingPluginException if the folder for the plugin to be loaded is not found
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| 88 | * @return void
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| 89 | */
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| 90 | public static function load($plugin, $config = array()) { |
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| 91 | if (is_array($plugin)) { |
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| 92 | foreach ($plugin as $name => $conf) { |
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| 93 | list($name, $conf) = (is_numeric($name)) ? array($conf, $config) : array($name, $conf); |
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| 94 | static::load($name, $conf); |
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| 95 | } |
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| 96 | return;
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| 97 | } |
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| 98 | $config += array('bootstrap' => false, 'routes' => false, 'ignoreMissing' => false); |
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| 99 | if (empty($config['path'])) { |
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| 100 | foreach (App::path('plugins') as $path) { |
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| 101 | if (is_dir($path . $plugin)) { |
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| 102 | static::$_plugins[$plugin] = $config + array('path' => $path . $plugin . DS); |
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| 103 | break;
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| 104 | } |
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| 105 | |||
| 106 | //Backwards compatibility to make easier to migrate to 2.0
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| 107 | $underscored = Inflector::underscore($plugin); |
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| 108 | if (is_dir($path . $underscored)) { |
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| 109 | static::$_plugins[$plugin] = $config + array('path' => $path . $underscored . DS); |
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| 110 | break;
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| 111 | } |
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| 112 | } |
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| 113 | } else {
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| 114 | static::$_plugins[$plugin] = $config; |
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| 115 | } |
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| 116 | |||
| 117 | if (empty(static::$_plugins[$plugin]['path'])) { |
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| 118 | throw new MissingPluginException(array('plugin' => $plugin)); |
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| 119 | } |
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| 120 | if (!empty(static::$_plugins[$plugin]['bootstrap'])) { |
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| 121 | static::bootstrap($plugin); |
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| 122 | } |
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| 123 | } |
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| 124 | |||
| 125 | /**
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| 126 | * Will load all the plugins located in the configured plugins folders
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| 127 | * If passed an options array, it will be used as a common default for all plugins to be loaded
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| 128 | * It is possible to set specific defaults for each plugins in the options array. Examples:
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| 129 | *
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| 130 | * ```
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| 131 | * CakePlugin::loadAll(array(
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| 132 | * array('bootstrap' => true),
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| 133 | * 'DebugKit' => array('routes' => true, 'bootstrap' => false),
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| 134 | * ))
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| 135 | * ```
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| 136 | *
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| 137 | * The above example will load the bootstrap file for all plugins, but for DebugKit it will only load
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| 138 | * the routes file and will not look for any bootstrap script. If you are loading
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| 139 | * many plugins that inconsistently support routes/bootstrap files, instead of detailing
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| 140 | * each plugin you can use the `ignoreMissing` option:
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| 141 | *
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| 142 | * ```
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| 143 | * CakePlugin::loadAll(array(
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| 144 | * 'ignoreMissing' => true,
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| 145 | * 'bootstrap' => true,
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| 146 | * 'routes' => true,
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| 147 | * ));
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| 148 | * ```
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| 149 | *
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| 150 | * The ignoreMissing option will do additional file_exists() calls but is simpler
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| 151 | * to use.
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| 152 | *
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| 153 | * @param array $options Options list. See CakePlugin::load() for valid options.
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| 154 | * @return void
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| 155 | */
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| 156 | public static function loadAll($options = array()) { |
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| 157 | $plugins = App::objects('plugins'); |
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| 158 | foreach ($plugins as $p) { |
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| 159 | $opts = isset($options[$p]) ? (array)$options[$p] : array(); |
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| 160 | if (isset($options[0])) { |
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| 161 | $opts += $options[0]; |
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| 162 | } |
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| 163 | static::load($p, $opts); |
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| 164 | } |
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| 165 | } |
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| 166 | |||
| 167 | /**
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| 168 | * Returns the filesystem path for a plugin
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| 169 | *
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| 170 | * @param string $plugin name of the plugin in CamelCase format
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| 171 | * @return string path to the plugin folder
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| 172 | * @throws MissingPluginException if the folder for plugin was not found or plugin has not been loaded
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| 173 | */
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| 174 | public static function path($plugin) { |
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| 175 | if (empty(static::$_plugins[$plugin])) { |
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| 176 | throw new MissingPluginException(array('plugin' => $plugin)); |
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| 177 | } |
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| 178 | return static::$_plugins[$plugin]['path']; |
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| 179 | } |
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| 180 | |||
| 181 | /**
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| 182 | * Loads the bootstrapping files for a plugin, or calls the initialization setup in the configuration
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| 183 | *
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| 184 | * @param string $plugin name of the plugin
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| 185 | * @return mixed
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| 186 | * @see CakePlugin::load() for examples of bootstrap configuration
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| 187 | */
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| 188 | public static function bootstrap($plugin) { |
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| 189 | $config = static::$_plugins[$plugin]; |
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| 190 | if ($config['bootstrap'] === false) { |
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| 191 | return false; |
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| 192 | } |
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| 193 | if (is_callable($config['bootstrap'])) { |
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| 194 | return call_user_func_array($config['bootstrap'], array($plugin, $config)); |
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| 195 | } |
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| 196 | |||
| 197 | $path = static::path($plugin); |
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| 198 | if ($config['bootstrap'] === true) { |
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| 199 | return static::_includeFile( |
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| 200 | $path . 'Config' . DS . 'bootstrap.php', |
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| 201 | $config['ignoreMissing'] |
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| 202 | ); |
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| 203 | } |
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| 204 | |||
| 205 | $bootstrap = (array)$config['bootstrap']; |
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| 206 | foreach ($bootstrap as $file) { |
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| 207 | static::_includeFile(
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| 208 | $path . 'Config' . DS . $file . '.php', |
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| 209 | $config['ignoreMissing'] |
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| 210 | ); |
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| 211 | } |
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| 212 | |||
| 213 | return true; |
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| 214 | } |
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| 215 | |||
| 216 | /**
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| 217 | * Loads the routes file for a plugin, or all plugins configured to load their respective routes file
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| 218 | *
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| 219 | * @param string $plugin name of the plugin, if null will operate on all plugins having enabled the
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| 220 | * loading of routes files
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| 221 | * @return bool
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| 222 | */
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| 223 | public static function routes($plugin = null) { |
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| 224 | if ($plugin === null) { |
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| 225 | foreach (static::loaded() as $p) { |
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| 226 | static::routes($p); |
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| 227 | } |
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| 228 | return true; |
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| 229 | } |
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| 230 | $config = static::$_plugins[$plugin]; |
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| 231 | if ($config['routes'] === false) { |
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| 232 | return false; |
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| 233 | } |
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| 234 | return (bool)static::_includeFile( |
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| 235 | static::path($plugin) . 'Config' . DS . 'routes.php', |
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| 236 | $config['ignoreMissing'] |
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| 237 | ); |
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| 238 | } |
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| 239 | |||
| 240 | /**
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| 241 | * Returns true if the plugin $plugin is already loaded
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| 242 | * If plugin is null, it will return a list of all loaded plugins
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| 243 | *
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| 244 | * @param string $plugin Plugin name to check.
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| 245 | * @return mixed boolean true if $plugin is already loaded.
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| 246 | * If $plugin is null, returns a list of plugins that have been loaded
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| 247 | */
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| 248 | public static function loaded($plugin = null) { |
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| 249 | if ($plugin) { |
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| 250 | return isset(static::$_plugins[$plugin]); |
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| 251 | } |
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| 252 | $return = array_keys(static::$_plugins); |
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| 253 | sort($return); |
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| 254 | return $return; |
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| 255 | } |
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| 256 | |||
| 257 | /**
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| 258 | * Forgets a loaded plugin or all of them if first parameter is null
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| 259 | *
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| 260 | * @param string $plugin name of the plugin to forget
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| 261 | * @return void
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| 262 | */
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| 263 | public static function unload($plugin = null) { |
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| 264 | if ($plugin === null) { |
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| 265 | static::$_plugins = array(); |
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| 266 | } else {
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| 267 | unset(static::$_plugins[$plugin]); |
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| 268 | } |
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| 269 | } |
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| 270 | |||
| 271 | /**
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| 272 | * Include file, ignoring include error if needed if file is missing
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| 273 | *
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| 274 | * @param string $file File to include
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| 275 | * @param bool $ignoreMissing Whether to ignore include error for missing files
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| 276 | * @return mixed
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| 277 | */
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| 278 | protected static function _includeFile($file, $ignoreMissing = false) { |
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| 279 | if ($ignoreMissing && !is_file($file)) { |
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| 280 | return false; |
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| 281 | } |
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| 282 | return include $file; |
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| 283 | } |
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| 284 | |||
| 285 | } |