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<?php |
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/** |
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* Copyright 2014 Fabian Grutschus. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without modification, |
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* are permitted provided that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright notice, this |
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* list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright notice, |
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* this list of conditions and the following disclaimer in the documentation |
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* and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR |
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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* The views and conclusions contained in the software and documentation are those |
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* of the authors and should not be interpreted as representing official policies, |
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* either expressed or implied, of the copyright holders. |
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* |
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* @author Fabian Grutschus <[email protected]> |
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* @copyright 2014 Fabian Grutschus. All rights reserved. |
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* @license BSD |
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* @link http://github.com/fabiang/xmpp |
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*/ |
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namespace Fabiang\Xmpp\Event; |
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use Fabiang\Xmpp\Exception\InvalidArgumentException; |
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/** |
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* Event manager. |
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* |
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* The EventManager holds and triggers events. |
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* |
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* @package Xmpp\Event |
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*/ |
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class EventManager implements EventManagerInterface |
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{ |
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const WILDCARD = '*'; |
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/** |
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* Attached events. |
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* |
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* @var array |
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*/ |
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protected $events = [self::WILDCARD => []]; |
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/** |
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* Event object. |
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* |
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* @var EventInterface |
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*/ |
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protected $eventObject; |
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/** |
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* Constructor sets default event object. |
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* |
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* @param EventInterface $eventObject Event object |
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*/ |
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public function __construct(EventInterface $eventObject = null) |
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{ |
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if (null === $eventObject) { |
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$eventObject = new Event; |
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} |
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$this->eventObject = $eventObject; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function attach($event, $callback) |
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{ |
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if (!is_callable($callback, true)) { |
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throw new InvalidArgumentException( |
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'Second argument of "' . __CLASS__ . '"::attach must be a valid callback' |
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); |
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} |
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if (!isset($this->events[$event])) { |
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$this->events[$event] = []; |
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} |
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if (!in_array($callback, $this->events[$event], true)) { |
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$this->events[$event][] = $callback; |
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} |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function trigger($event, $caller, array $parameters) |
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{ |
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if (empty($this->events[$event]) && empty($this->events[self::WILDCARD])) { |
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return; |
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} |
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$events = []; |
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if (!empty($this->events[$event])) { |
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$events = $this->events[$event]; |
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} |
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$callbacks = array_merge($events, $this->events[self::WILDCARD]); |
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$previous = []; |
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$eventObject = clone $this->getEventObject(); |
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$eventObject->setName($event); |
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$eventObject->setTarget($caller); |
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$eventObject->setParameters($parameters); |
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do { |
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$current = array_shift($callbacks); |
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call_user_func($current, $eventObject); |
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$previous[] = $current; |
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$eventObject = clone $eventObject; |
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$eventObject->setEventStack($previous); |
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} while (count($callbacks) > 0); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function getEventObject() |
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{ |
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return $this->eventObject; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function setEventObject(EventInterface $eventObject) |
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{ |
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$this->eventObject = $eventObject; |
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return $this; |
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} |
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/** |
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* Return list of events. |
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* |
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* @return array |
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*/ |
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public function getEventList() |
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{ |
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return $this->events; |
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} |
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} |
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fabiang /
xmpp
