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<?php
/**
* A class that implements the plugin's system
*/
class PluginManager {
/**
* Attributes
*/
private $plugins_list = array();
private $available_hooks = array(
'head',
'toplinks',
'tabs',
'trail',
'navlinks',
'actionbuttons',
'tree',
'logout'
);
private $actions = array();
private $hooks = array();
/**
* Register the plugins
* @param $language - Language that have been used.
*/
function __construct($language) {
global $conf, $lang;
if (! isset($conf['plugins'])) return;
// Get the activated plugins
$plugins = $conf['plugins'];
foreach ($plugins as $activated_plugin) {
$plugin_file = './plugins/'.$activated_plugin.'/plugin.php';
// Verify is the activated plugin exists
if (file_exists($plugin_file)) {
include_once($plugin_file);
try {
$plugin = new $activated_plugin($language);
$this->add_plugin($plugin);
}
catch (Exception $e) {
continue;
}
} else {
printf($lang['strpluginnotfound']."\t\n", $activated_plugin);
exit;
}
}
}
/**
* Add a plugin in the list of plugins to manage
* @param $plugin - Instance from plugin
*/
function add_plugin($plugin) {
global $lang;
//The $plugin_name is the identification of the plugin.
//Example: PluginExample is the identification for PluginExample
//It will be used to get a specific plugin from the plugins_list.
$plugin_name = $plugin->get_name();
$this->plugins_list[$plugin_name] = $plugin;
//Register the plugin's functions
$hooks = $plugin->get_hooks();
foreach ($hooks as $hook => $functions) {
if (!in_array($hook, $this->available_hooks)) {
printf($lang['strhooknotfound']."\t\n", $hook);
exit;
}
$this->hooks[$hook][$plugin_name] = $functions;
}
//Register the plugin's actions
$actions = $plugin->get_actions();
$this->actions[$plugin_name] = $actions;
}
function getPlugin($plugin) {
if (isset($this->plugins_list[$plugin]))
return $this->plugins_list[$plugin];
return null;
}
/**
* Execute the plugins hook functions when needed.
* @param $hook - The place where the function will be called
* @param $function_args - An array reference with arguments to give to called function
*/
function do_hook($hook, &$function_args) {
if (isset($this->hooks[$hook])) {
foreach ($this->hooks[$hook] as $plugin_name => $functions) {
$plugin = $this->plugins_list[$plugin_name];
foreach ($functions as $function) {
if (method_exists($plugin, $function)) {
call_user_func(array($plugin, $function), $function_args);
}
}
}
}
}
/**
* Execute a plugin's action
* @param $plugin_name - The plugin name.
* @param $action - action that will be executed.
*/
function do_action($plugin_name, $action) {
global $lang;
if (!isset($this->plugins_list[$plugin_name])) {
// Show an error and stop the application
printf($lang['strpluginnotfound']."\t\n", $plugin_name);
exit;
}
$plugin = $this->plugins_list[$plugin_name];
// Check if the plugin's method exists and if this method is an declared action.
if (method_exists($plugin, $action) and in_array($action, $this->actions[$plugin_name])) {
call_user_func(array($plugin, $action));
}
else {
// Show an error and stop the application
printf($lang['stractionnotfound']."\t\n", $action, $plugin_name);
exit;
}
}
}
?>
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