scratch – Blame information for rev 115

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115 office 1 <?php
2  
3 /*
4 * This file is part of Evenement.
5 *
6 * (c) Igor Wiedler <igor@wiedler.ch>
7 *
8 * For the full copyright and license information, please view the LICENSE
9 * file that was distributed with this source code.
10 */
11  
12 namespace Evenement;
13  
14 trait EventEmitterTrait
15 {
16 protected $listeners = [];
17  
18 public function on($event, callable $listener)
19 {
20 if (!isset($this->listeners[$event])) {
21 $this->listeners[$event] = [];
22 }
23  
24 $this->listeners[$event][] = $listener;
25 }
26  
27 public function once($event, callable $listener)
28 {
29 $onceListener = function () use (&$onceListener, $event, $listener) {
30 $this->removeListener($event, $onceListener);
31  
32 call_user_func_array($listener, func_get_args());
33 };
34  
35 $this->on($event, $onceListener);
36 }
37  
38 public function removeListener($event, callable $listener)
39 {
40 if (isset($this->listeners[$event])) {
41 if (false !== $index = array_search($listener, $this->listeners[$event], true)) {
42 unset($this->listeners[$event][$index]);
43 }
44 }
45 }
46  
47 public function removeAllListeners($event = null)
48 {
49 if ($event !== null) {
50 unset($this->listeners[$event]);
51 } else {
52 $this->listeners = [];
53 }
54 }
55  
56 public function listeners($event)
57 {
58 return isset($this->listeners[$event]) ? $this->listeners[$event] : [];
59 }
60  
61 public function emit($event, array $arguments = [])
62 {
63 foreach ($this->listeners($event) as $listener) {
64 call_user_func_array($listener, $arguments);
65 }
66 }
67 }