62 lines
1.5 KiB
PHP
62 lines
1.5 KiB
PHP
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<?php
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/**
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* This file is part of the Peast package
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*
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* (c) Marco Marchiò <marco.mm89@gmail.com>
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*
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* For the full copyright and license information refer to the LICENSE file
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* distributed with this source code
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*/
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namespace Peast\Syntax;
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/**
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* Events emitter class. An instance of this class is used by Parser and Scanner
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* to emit events and attach listeners to them
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*
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* @author Marco Marchiò <marco.mm89@gmail.com>
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*/
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class EventsEmitter
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{
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/**
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* Events registry array
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*
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* @var array
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*/
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protected $eventsRegistry = array();
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/**
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* Attaches a listener function to the given event
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*
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* @param string $event Event name
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* @param callable $listener Listener function
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*
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* @return $this
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*/
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public function addListener($event, $listener)
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{
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if (!isset($this->eventsRegistry[$event])) {
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$this->eventsRegistry[$event] = array();
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}
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$this->eventsRegistry[$event][] = $listener;
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return $this;
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}
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/**
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* Fires an event
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*
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* @param string $event Event name
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* @param array $args Arguments to pass to functions attached to the
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* event
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*
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* @return $this
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*/
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public function fire($event, $args = array())
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{
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if (isset($this->eventsRegistry[$event])) {
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foreach ($this->eventsRegistry[$event] as $listener) {
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call_user_func_array($listener, $args);
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}
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}
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return $this;
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}
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}
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