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<?php
/**
* CakePlugin class
*
* PHP 5
*
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright 2005-2011, Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright 2005-2011, Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://cakephp.org CakePHP(tm) Project
* @package Cake.Core
* @since CakePHP(tm) v 2.0.0
* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
*/
/**
* CakePlugin class
*
* @package Cake.Core
*/
class CakePlugin {
/**
* Holds a list of all loaded plugins and their configuration
*
* @var array
*/
protected static $_plugins = array();
/**
* Loads a plugin and optionally loads bootstrapping, routing files or loads a initialization function
*
* Examples:
*
* `CakePlugin::load('DebugKit')` will load the DebugKit plugin and will not load any bootstrap nor route files
* `CakePlugin::load('DebugKit', array('bootstrap' => true, 'routes' => true))` will load the bootstrap.php and routes.php files
* `CakePlugin::load('DebugKit', array('bootstrap' => false, 'routes' => true))` will load routes.php file but not bootstrap.php
* `CakePlugin::load('DebugKit', array('bootstrap' => array('config1', 'config2')))` will load config1.php and config2.php files
* `CakePlugin::load('DebugKit', array('bootstrap' => 'aCallableMethod'))` will run the aCallableMethod function to initialize it
*
* Bootstrap initialization functions can be expressed as a PHP callback type, including closures. Callbacks will receive two
* parameters (plugin name, plugin configuration)
*
* It is also possible to load multiple plugins at once. Examples:
*
* `CakePlugin::load(array('DebugKit', 'ApiGenerator'))` will load the DebugKit and ApiGenerator plugins
* `CakePlugin::load(array('DebugKit', 'ApiGenerator'), array('bootstrap' => true))` will load bootstrap file for both plugins
*
* {{{
* CakePlugin::load(array(
* 'DebugKit' => array('routes' => true),
* 'ApiGenerator'
* ), array('bootstrap' => true))
* }}}
*
* Will only load the bootstrap for ApiGenerator and only the routes for DebugKit
*
* @param mixed $plugin name of the plugin to be loaded in CamelCase format or array or plugins to load
* @param array $config configuration options for the plugin
* @throws MissingPluginException if the folder for the plugin to be loaded is not found
* @return void
*/
public static function load($plugin, $config = array()) {
if (is_array($plugin)) {
foreach ($plugin as $name => $conf) {
list($name, $conf) = (is_numeric($name)) ? array($conf, $config) : array($name, $conf);
self::load($name, $conf);
}
return;
}
$config += array('bootstrap' => false, 'routes' => false);
if (empty($config['path'])) {
foreach (App::path('plugins') as $path) {
if (is_dir($path . $plugin)) {
self::$_plugins[$plugin] = $config + array('path' => $path . $plugin . DS);
break;
}
//Backwards compatibility to make easier to migrate to 2.0
$underscored = Inflector::underscore($plugin);
if (is_dir($path . $underscored)) {
self::$_plugins[$plugin] = $config + array('path' => $path . $underscored . DS);
break;
}
}
} else {
self::$_plugins[$plugin] = $config;
}
if (empty(self::$_plugins[$plugin]['path'])) {
throw new MissingPluginException(array('plugin' => $plugin));
}
if (!empty(self::$_plugins[$plugin]['bootstrap'])) {
self::bootstrap($plugin);
}
}
/**
* Will load all the plugins located in the configured plugins folders
* If passed an options array, it will be used as a common default for all plugins to be loaded
* It is possible to set specific defaults for each plugins in the options array. Examples:
*
* {{{
* CakePlugin::loadAll(array(
* array('bootstrap' => true),
* 'DebugKit' => array('routes' => true),
* ))
* }}}
*
* The above example will load the bootstrap file for all plugins, but for DebugKit it will only load the routes file
* and will not look for any bootstrap script.
*
* @param array $options
* @return void
*/
public static function loadAll($options = array()) {
$plugins = App::objects('plugins');
foreach ($plugins as $p) {
$opts = isset($options[$p]) ? $options[$p] : null;
if ($opts === null && isset($options[0])) {
$opts = $options[0];
}
self::load($p, (array) $opts);
}
}
/**
* Returns the filesystem path for a plugin
*
* @param string $plugin name of the plugin in CamelCase format
* @return string path to the plugin folder
* @throws MissingPluginException if the folder for plugin was not found or plugin has not been loaded
*/
public static function path($plugin) {
if (empty(self::$_plugins[$plugin])) {
throw new MissingPluginException(array('plugin' => $plugin));
}
return self::$_plugins[$plugin]['path'];
}
/**
* Loads the bootstrapping files for a plugin, or calls the initialization setup in the configuration
*
* @param string $plugin name of the plugin
* @return mixed
* @see CakePlugin::load() for examples of bootstrap configuration
*/
public static function bootstrap($plugin) {
$config = self::$_plugins[$plugin];
if ($config['bootstrap'] === false) {
return false;
}
if (is_callable($config['bootstrap'])) {
return call_user_func_array($config['bootstrap'], array($plugin, $config));
}
$path = self::path($plugin);
if ($config['bootstrap'] === true) {
return include($path . 'Config' . DS . 'bootstrap.php');
}
$bootstrap = (array)$config['bootstrap'];
foreach ($bootstrap as $file) {
include $path . 'Config' . DS . $file . '.php';
}
return true;
}
/**
* Loads the routes file for a plugin, or all plugins configured to load their respective routes file
*
* @param string $plugin name of the plugin, if null will operate on all plugins having enabled the
* loading of routes files
* @return boolean
*/
public static function routes($plugin = null) {
if ($plugin === null) {
foreach (self::loaded() as $p) {
self::routes($p);
}
return true;
}
$config = self::$_plugins[$plugin];
if ($config['routes'] === false) {
return false;
}
return (bool) include self::path($plugin) . 'Config' . DS . 'routes.php';
}
/**
* Retruns true if the plugin $plugin is already loaded
* If plugin is null, it will return a list of all loaded plugins
*
* @param string $plugin
* @return mixed boolean true if $plugin is already loaded.
* If $plugin is null, returns a list of plugins that have been loaded
*/
public static function loaded($plugin = null) {
if ($plugin) {
return isset(self::$_plugins[$plugin]);
}
$return = array_keys(self::$_plugins);
sort($return);
return $return;
}
/**
* Forgets a loaded plugin or all of them if first parameter is null
*
* @param string $plugin name of the plugin to forget
* @return void
*/
public static function unload($plugin = null) {
if (is_null($plugin)) {
self::$_plugins = array();
} else {
unset(self::$_plugins[$plugin]);
}
}
}
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