1
|
|
|
<?php |
2
|
|
|
/** |
3
|
|
|
* @Author : a.zinovyev |
4
|
|
|
* @Package: emittr |
5
|
|
|
* @License: http://www.opensource.org/licenses/mit-license.php |
6
|
|
|
*/ |
7
|
|
|
|
8
|
|
|
namespace xobotyi\emittr; |
9
|
|
|
|
10
|
|
|
class EventEmitter implements Interfaces\EventEmitter |
11
|
|
|
{ |
12
|
|
|
public const EVENT_LISTENER_ADDED = 'listenerAdded'; |
13
|
|
|
public const EVENT_LISTENER_REMOVED = 'listenerRemoved'; |
14
|
|
|
|
15
|
|
|
/** |
16
|
|
|
* @var Interfaces\EventEmitterGlobal; |
17
|
|
|
*/ |
18
|
|
|
private $eventEmitterGlobal; |
19
|
|
|
|
20
|
|
|
private $eventListeners = []; |
21
|
|
|
|
22
|
|
|
private $maxListenersCount = 10; |
23
|
|
|
|
24
|
|
|
public function __construct(?Interfaces\EventEmitterGlobal $emitterGlobal = null) { |
25
|
|
|
$this->setGlobalEmitter($emitterGlobal ?: EventEmitterGlobal::getInstance()); |
26
|
|
|
} |
27
|
|
|
|
28
|
|
|
public function emit(string $eventName, $payload = null) :self { |
29
|
|
|
$event = new Event($eventName, $payload, get_called_class(), $this); |
30
|
|
|
|
31
|
|
|
if (empty($this->eventListeners) || $this->eventEmitterGlobal::propagateEvent($event, $this->eventListeners)) { |
32
|
|
|
$this->eventEmitterGlobal->propagateEventGlobal($event); |
33
|
|
|
} |
34
|
|
|
|
35
|
|
|
return $this; |
36
|
|
|
} |
37
|
|
|
|
38
|
|
|
public function on(string $eventName, $callback) :self { |
39
|
|
|
$this->eventEmitterGlobal::storeCallback($this->eventListeners, $eventName, $callback, $this->maxListenersCount, false, false); |
40
|
|
|
$this->emit(self::EVENT_LISTENER_ADDED, ['callback' => &$callback]); |
41
|
|
|
|
42
|
|
|
return $this; |
43
|
|
|
} |
44
|
|
|
|
45
|
|
|
public function once(string $eventName, $callback) :self { |
46
|
|
|
$this->eventEmitterGlobal::storeCallback($this->eventListeners, $eventName, $callback, $this->maxListenersCount, true, false); |
47
|
|
|
$this->emit(self::EVENT_LISTENER_ADDED, ['callback' => &$callback]); |
48
|
|
|
|
49
|
|
|
return $this; |
50
|
|
|
} |
51
|
|
|
|
52
|
|
|
public function prependListener(string $eventName, $callback) :self { |
53
|
|
|
$this->eventEmitterGlobal::storeCallback($this->eventListeners, $eventName, $callback, $this->maxListenersCount, false, true); |
54
|
|
|
$this->emit(self::EVENT_LISTENER_ADDED, ['callback' => &$callback]); |
55
|
|
|
|
56
|
|
|
return $this; |
57
|
|
|
} |
58
|
|
|
|
59
|
|
|
public function prependOnceListener(string $eventName, $callback) :self { |
60
|
|
|
$this->eventEmitterGlobal::storeCallback($this->eventListeners, $eventName, $callback, $this->maxListenersCount, true, true); |
61
|
|
|
$this->emit(self::EVENT_LISTENER_ADDED, ['callback' => &$callback]); |
62
|
|
|
|
63
|
|
|
return $this; |
64
|
|
|
} |
65
|
|
|
|
66
|
|
|
public function off(string $eventName, $callback) :self { |
67
|
|
|
if (empty($this->eventListeners[$eventName])) { |
68
|
|
|
return $this; |
69
|
|
|
} |
70
|
|
|
|
71
|
|
|
$this->eventListeners[$eventName] = \array_values(\array_filter($this->eventListeners[$eventName], function ($item) use (&$callback) { return $item[1] !== $callback; })); |
72
|
|
|
$this->emit(self::EVENT_LISTENER_REMOVED, ['eventName' => $eventName, 'callback' => &$callback]); |
73
|
|
|
|
74
|
|
|
if (empty($this->eventListeners[$eventName])) { |
75
|
|
|
unset($this->eventListeners[$eventName]); |
76
|
|
|
} |
77
|
|
|
|
78
|
|
|
return $this; |
79
|
|
|
} |
80
|
|
|
|
81
|
|
|
public function removeAllListeners(?string $eventName = null) :self { |
82
|
|
|
if ($eventName === null) { |
83
|
|
|
foreach ($this->eventListeners as $eventName => $callbacks) { |
84
|
|
|
foreach ($callbacks as &$callback) { |
85
|
|
|
$this->emit(self::EVENT_LISTENER_REMOVED, [ |
86
|
|
|
'eventName' => $eventName, |
87
|
|
|
'callback' => &$callback[1], |
88
|
|
|
]); |
89
|
|
|
} |
90
|
|
|
} |
91
|
|
|
|
92
|
|
|
$this->eventListeners = []; |
93
|
|
|
|
94
|
|
|
return $this; |
95
|
|
|
} |
96
|
|
|
|
97
|
|
|
if (empty($this->eventListeners[$eventName])) { |
98
|
|
|
return $this; |
99
|
|
|
} |
100
|
|
|
|
101
|
|
|
foreach ($this->eventListeners[$eventName] as $callback) { |
102
|
|
|
$this->emit(self::EVENT_LISTENER_REMOVED, ['eventName' => $eventName, 'callback' => &$callback[1]]); |
103
|
|
|
} |
104
|
|
|
|
105
|
|
|
unset($this->eventListeners[$eventName]); |
106
|
|
|
|
107
|
|
|
return $this; |
108
|
|
|
} |
109
|
|
|
|
110
|
|
|
public function getEventNames() :array { |
111
|
|
|
return empty($this->eventListeners) ? [] : \array_keys($this->eventListeners); |
112
|
|
|
} |
113
|
|
|
|
114
|
|
|
public function getListeners(?string $eventName = null) :array { |
115
|
|
|
return $eventName ? $this->eventListeners[$eventName] ?? [] : $this->eventListeners; |
116
|
|
|
} |
117
|
|
|
|
118
|
|
|
public function getMaxListenersCount() :int { |
119
|
|
|
return $this->maxListenersCount; |
120
|
|
|
} |
121
|
|
|
|
122
|
|
|
public function setMaxListenersCount(int $maxListenersCount) :self { |
123
|
|
|
if ($maxListenersCount < 0) { |
124
|
|
|
throw new \InvalidArgumentException('Listeners count must be greater or equal 0, got ' . $maxListenersCount); |
125
|
|
|
} |
126
|
|
|
|
127
|
|
|
$this->maxListenersCount = $maxListenersCount; |
128
|
|
|
|
129
|
|
|
return $this; |
130
|
|
|
} |
131
|
|
|
|
132
|
|
|
public function getGlobalEmitter() :Interfaces\EventEmitterGlobal { |
133
|
|
|
return $this->eventEmitterGlobal; |
134
|
|
|
} |
135
|
|
|
|
136
|
|
|
public function setGlobalEmitter(Interfaces\EventEmitterGlobal $emitterGlobal) :self { |
137
|
|
|
$this->eventEmitterGlobal = $emitterGlobal; |
138
|
|
|
|
139
|
|
|
return $this; |
140
|
|
|
} |
141
|
|
|
} |