xp-dev.com Git - namibia/blob - module/Utility/src/Utility/Event.php

   1 <?php
   2 namespace Utility;
   3
   4
   5
   6 /**
   7  * Simple event handler.
   8  * @author andre.fourie
   9  *
  10  */
  11 class Event
  12 {
  13
  14         /**
  15          * @var array
  16          */
  17         static protected $listener = array();
  18
  19
  20         /**
  21          * Register an event listener.
  22          * @param string $eventName
  23          * @param object|string $class
  24          * @param string $action
  25          */
  26         static public function listen($eventName, $class, $action)
  27         {
  28                 !isset(self::$listener[$eventName])
  29                         && self::$listener[$eventName] = array();
  30                 self::$listener[$eventName][] = array(
  31                                 'Class'  => $class,
  32                                 'Action' => $action
  33                 );
  34         }
  35
  36         /**
  37          * Trigger an event.
  38          * @param string $eventName
  39          * @param unknown|null $data
  40          */
  41         static public function trigger($eventName, $data = null)
  42         {
  43                 if (!isset(self::$listener[$eventName]))
  44                 {
  45                         return;
  46                 }
  47                 foreach (self::$listener[$eventName] as $listener)
  48                 {
  49                         $obj = is_object($listener['Class'])
  50                                 ? $listener['Class']
  51                                 : new $listener['Class']();
  52                         $action = $listener['Action'];
  53                         $obj->$action($eventName, $data);
  54                 }
  55         }
  56
  57 }
  58