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<?php |
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/** |
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* Phossa Project |
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* |
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* PHP version 5.4 |
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* |
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* @category Library |
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* @package Phossa2\Event |
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* @copyright Copyright (c) 2016 phossa.com |
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* @license http://mit-license.org/ MIT License |
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* @link http://www.phossa.com/ |
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*/ |
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/*# declare(strict_types=1); */ |
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namespace Phossa2\Event\Traits; |
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use Phossa2\Event\Interfaces\EventInterface; |
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use Phossa2\Event\Interfaces\CountableInterface; |
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/** |
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* CountableTrait |
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* |
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* Implmentation of CountableInterface |
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* |
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* @package Phossa2\Event |
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* @author Hong Zhang <[email protected]> |
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* @see CountableInterface |
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* @version 2.1.0 |
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* @since 2.0.0 added |
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* @since 2.1.0 updated |
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*/ |
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trait CountableTrait |
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{ |
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/** |
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* callable mapping |
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* |
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* @var callable[]; |
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* @access protected |
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*/ |
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protected $callable_map = []; |
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/** |
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* {@inheritDoc} |
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*/ |
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public function many( |
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/*# int */ $times, |
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/*# string */ $eventName, |
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callable $callable, |
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/*# int */ $priority = 0 |
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)/*# : bool */ { |
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// wrap the callable |
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$wrapper = function (EventInterface $event) use ($callable, $times) { |
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static $cnt = 0; |
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if ($cnt++ < $times) { |
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call_user_func($callable, $event); |
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} |
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}; |
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// mapping callable |
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$oid = $this->hashCallable($callable); |
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$this->callable_map[$eventName][$oid] = $wrapper; |
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// bind wrapper instead of the $callable |
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$this->attach($eventName, $wrapper, $priority); |
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return true; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function one( |
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/*# string */ $eventName, |
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callable $callable, |
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/*# int */ $priority = 0 |
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)/*# : bool */ { |
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return $this->many(1, $eventName, $callable, $priority); |
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} |
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/** |
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* Override `detach()` in EventManager |
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* |
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* Added support for countable callable |
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* |
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* {@inheritDoc} |
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*/ |
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public function detach($event, $callback) |
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{ |
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if (null !== $callback) { |
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$oid = $this->hashCallable($callback); |
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if (isset($this->callable_map[$event][$oid])) { |
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$callback = $this->callable_map[$event][$oid]; |
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unset($this->callable_map[$event][$oid]); |
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} |
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} else { |
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unset($this->callable_map[$event]); |
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} |
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return parent::detach($event, $callback); |
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} |
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/** |
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* Returns a unique id for $callable with $eventName |
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* |
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* @param callable $callable |
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* @return string |
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* @access protected |
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*/ |
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protected function hashCallable(callable $callable)/*# string */ |
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{ |
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return spl_object_hash((object) $callable); |
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} |
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// from EventManagerInterface |
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abstract public function attach($event, $callback, $priority = 0); |
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} |
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phossa2 /
event
