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Event.php
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91 lines (79 loc) · 1.88 KB
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<?php
namespace Resque;
/**
* Resque event/plugin system class
*
* @package Resque/Event
* @author Chris Boulton <chris@bigcommerce.com>
* @license http://www.opensource.org/licenses/mit-license.php
*/
class Event
{
/**
* @var array Array containing all registered callbacks, indexked by event name.
*/
private static $events = array();
/**
* Raise a given event with the supplied data.
*
* @param string $event Name of event to be raised.
* @param mixed $data Optional, any data that should be passed to each callback.
* @return true
*/
public static function trigger($event, $data = null)
{
if (!is_array($data)) {
$data = array($data);
}
if (empty(self::$events[$event])) {
return true;
}
foreach (self::$events[$event] as $callback) {
if (!is_callable($callback)) {
continue;
}
call_user_func_array($callback, $data);
}
return true;
}
/**
* Listen in on a given event to have a specified callback fired.
*
* @param string $event Name of event to listen on.
* @param mixed $callback Any callback callable by call_user_func_array.
* @return true
*/
public static function listen($event, $callback)
{
if (!isset(self::$events[$event])) {
self::$events[$event] = array();
}
self::$events[$event][] = $callback;
return true;
}
/**
* Stop a given callback from listening on a specific event.
*
* @param string $event Name of event.
* @param mixed $callback The callback as defined when listen() was called.
* @return true
*/
public static function stopListening($event, $callback)
{
if (!isset(self::$events[$event])) {
return true;
}
$key = array_search($callback, self::$events[$event]);
if ($key !== false) {
unset(self::$events[$event][$key]);
}
return true;
}
/**
* Call all registered listeners.
*/
public static function clearListeners()
{
self::$events = array();
}
}