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<?php |
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class Ajde_Event extends Ajde_Object_Static |
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{ |
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protected static $eventStack = []; |
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/** |
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* Register a callback on an object event. Note that when an object instance |
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* is passed, only the classname is used. Thus, an Ajde_Event can not be used |
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* to trigger different callbacks for the same event on different object instances |
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* of the same class. |
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* |
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* @param mixed $object Object instance or classname triggering the event |
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* @param string $event Event name |
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* @param mixed $callback Callback |
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* |
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* @return bool true |
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*/ |
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public static function register($object, $event, $callback) |
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{ |
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self::$eventStack[self::className($object)][$event][] = $callback; |
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return true; |
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} |
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public static function unregister($object, $event) |
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{ |
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if (isset(self::$eventStack[self::className($object)][$event])) { |
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unset(self::$eventStack[self::className($object)][$event]); |
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return true; |
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} |
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return false; |
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} |
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public static function has($object, $event, $callback = null) |
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{ |
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if (isset($callback)) { |
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return |
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isset(self::$eventStack[self::className($object)][$event]) && |
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in_array($callback, self::$eventStack[self::className($object)][$event]); |
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} else { |
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return isset(self::$eventStack[self::className($object)][$event]); |
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} |
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} |
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public static function trigger($object, $event, array $parameters = []) |
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{ |
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foreach (self::$eventStack as $className => $eventStack) { |
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if (self::className($object) == $className || |
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is_subclass_of(self::className($object), $className) |
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) { |
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if (isset($eventStack[$event])) { |
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foreach ($eventStack[$event] as $eventCallback) { |
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$retval = null; |
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$callback = null; |
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if (is_callable($eventCallback)) { |
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$callback = $eventCallback; |
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} elseif (is_string($eventCallback)) { |
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if (is_callable([$object, $eventCallback])) { |
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$callback = [$object, $eventCallback]; |
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} |
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} |
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if (isset($callback)) { |
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$trace = debug_backtrace(); |
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$current = array_shift($trace); |
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$caller = array_shift($trace); |
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if (isset($caller['object'])) { |
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// http://www.php.net/manual/en/function.call-user-func.php |
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// Note: Note that the parameters for call_user_func() are not passed by reference. |
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$parameterArray = array_merge([&$caller['object']], $parameters); |
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$retval = call_user_func_array($callback, $parameterArray); |
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if (isset($retval)) { |
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// TODO: Aborts execution of cueue! |
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return $retval; |
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} |
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} elseif (isset($caller['class']) && isset($caller['function']) && $caller['type'] === '::') { |
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// triggered from static context |
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// TODO: update exception 90015 |
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$retval = call_user_func_array($callback, $parameters); |
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if (isset($retval)) { |
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// TODO: Aborts execution of cueue! |
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return $retval; |
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} |
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} elseif ($callback instanceof Closure) { |
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$retval = $callback(); |
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if (isset($retval)) { |
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// TODO: Aborts execution of cueue! |
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return $retval; |
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} |
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} else { |
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throw new Ajde_Exception('Event context needed to |
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fire, none detected', 90015); |
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} |
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} else { |
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// TODO: right now never fires in Object_Magic objects |
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// because of the __call magic function. Workaround |
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// could be something like in_array("bar",get_class_methods($f1) |
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// see: http://php.net/manual/en/function.method-exists.php |
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throw new Ajde_Exception('Callback is not valid', 90016); |
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} |
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} |
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} |
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} |
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} |
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} |
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protected static function className($object) |
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{ |
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if (is_object($object)) { |
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return get_class($object); |
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} elseif (is_string($object) && class_exists($object)) { |
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return $object; |
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} |
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throw new Ajde_Exception('No classname or object instance given, or classname is incorrect', 90012); |
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} |
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} |
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nabble /
ajde
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