/**
* static method that returns a single instance of this class.
*
* @static
* @param path If the object is being created for the first time, this will be passed to the constructor
* of the class as the first parameter. If a class instance already exists, this path will be added to the
* list of already existing paths to scan.
* @return a ResourceClassLoader object
*/
function &getLoader($path = null)
{
static $instance;
if ($instance == null) {
// create an instance if it does not exist yet...
$instance = new ResourceClassLoader();
}
// if a path is given and the object already exists, then
// we can also automatically add it to the list of searched folders...
if ($path != null) {
$instance->addSearchFolder($path);
}
return $instance;
}
/**
* Loads all the plugins from disk
*
* @private
*/
function loadPlugins()
{
$classLoader =& ResourceClassLoader::getLoader();
foreach ($this->_pluginList as $plugin) {
$pluginFile = "./plugins/{$plugin}";
if (File::isDir($pluginFile)) {
// build up the name of the file
$pluginFileName = "plugin{$plugin}.class.php";
$pluginFullPath = PLOG_CLASS_PATH . "{$pluginFile}/{$pluginFileName}";
// and try to include it
if (File::isReadable($pluginFile . "/" . $pluginFileName)) {
$className = "Plugin" . $plugin;
include_once $pluginFullPath;
$classInstance = new $className();
$name = $classInstance->getId();
$classInstance->setPluginFolder(PLOG_CLASS_PATH . $pluginFile . "/");
// tell the resource loader that it should try to load actions from this folder
$classLoader->addSearchFolder(PLOG_CLASS_PATH . "{$pluginFile}/class/action/");
if ($name == "") {
throw new Exception("Plugin file {$pluginFile} has no identifier defined!");
die;
}
$this->_pluginInstances["{$plugin}"] = $classInstance;
}
}
}
return true;
}
/**
* $ActionsMap is an associative array of the form:
*
* ( $actionName, $actionClassName )
*
* Where for every different possible value of the 'action' parameter in the request,
* there is an object inheriting form the Action class that will take care of
* that requested action.
*
* @param actionMap is the associative array with the mappings
* @param actionParam is the name of the parameter in the request that will be used
* @param loadActionClasses By default set to 'true', enables dynamic loading of the
* action classes from disk. Set it to false if the action classes that are going
* to be needed by the controller have already been loaded and there is no need to
* do it again.
* to identify the action to be taken
*/
function Controller($actionMap, $actionParam = DEFAULT_ACTION_PARAM)
{
$this->Object();
global $_plogController_actionMap;
if (!is_array($_plogController_actionMap)) {
$_plogController_actionMap = array();
}
$_plogController_actionMap = $actionMap;
$this->_actionParam = $actionParam;
$this->_forwardAction = null;
// default folder where actions are located
$this->actionFolderPath = PLOG_CLASS_PATH . 'class/action/';
// get a resource loader so that we can dynamically load classes if they
// have not been loaded yet!
$this->_loader =& ResourceClassLoader::getLoader($this->actionFolderPath);
}
