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<?php
/**
* Generic helper for getting and executing hooks.
*/
class Hook
{
/**
* Get list of all known and enabled modules for given hook.
* Internally, this scans for "modules/<*>/hooks/$hookName.inc.php"
* and optionally checks if the module's dependencies are fulfilled,
* then returns a list of all matching modules.
* @param string $hookName Name of hook to search for.
* @param bool $filterBroken if true, modules that have a hook but have missing deps will not be returned
* @return \Hook[] list of modules with requested hooks
*/
public static function load($hookName, $filterBroken = true)
{
$retval = array();
foreach (glob('modules/*/hooks/' . $hookName . '.inc.php', GLOB_NOSORT) as $file) {
preg_match('#^modules/([^/]+)/#', $file, $out);
if ($filterBroken && !Module::isAvailable($out[1]))
continue;
$retval[] = new Hook($out[1], $file);
}
return $retval;
}
/**
* Load given hook for a specific module only.
*
* @param string $moduleName Module
* @param string $hookName Hook
* @param bool $filterBroken return false if the module has missing deps
* @return Hook|false hook instance, false on error or if module doesn't have given hook
*/
public static function loadSingle($moduleName, $hookName, $filterBroken = true)
{
if (Module::get($moduleName) === false) // No such module
return false;
if ($filterBroken && !Module::isAvailable($moduleName)) // Broken
return false;
$file = 'modules/' . $moduleName . '/hooks/' . $hookName . '.inc.php';
if (!file_exists($file)) // No hook
return false;
return new Hook($moduleName, $file);
}
/*
*
*/
public $moduleId;
public $file;
private function __construct($module, $hookFile)
{
$this->moduleId = $module;
$this->file = $hookFile;
}
/**
* Run the hook's code. The include is expected to return a
* value, which will in turn be the return value of this
* method.
*
* @return mixed The return value of the include file, or false on error
*/
public function run()
{
try {
return (include $this->file);
} catch (Exception $e) {
error_log($e);
return false;
}
}
}
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