1
|
|
|
<?php |
2
|
|
|
/** |
3
|
|
|
* @package narrator |
4
|
|
|
*/ |
5
|
|
|
|
6
|
|
|
|
7
|
|
|
namespace Mleko\Narrator; |
8
|
|
|
|
9
|
|
|
|
10
|
|
|
class SimpleEmitter implements EventSource, EventEmitter |
11
|
|
|
{ |
12
|
|
|
|
13
|
|
|
/** @var array */ |
14
|
|
|
private $listeners = []; |
15
|
|
|
|
16
|
|
|
/** @var EventNameExtractor */ |
17
|
|
|
private $eventNameExtractor; |
18
|
|
|
|
19
|
|
|
/** |
20
|
|
|
* SimpleEventBus constructor. |
21
|
|
|
* @param EventNameExtractor $eventNameExtractor |
22
|
|
|
* @param Listener[][] $listeners |
23
|
|
|
*/ |
24
|
8 |
|
public function __construct(EventNameExtractor $eventNameExtractor, array $listeners = []) |
25
|
|
|
{ |
26
|
8 |
|
$this->eventNameExtractor = $eventNameExtractor; |
27
|
8 |
|
foreach ($listeners as $eventName => $eventListeners) { |
28
|
1 |
|
foreach ($eventListeners as $listener) { |
29
|
1 |
|
$this->subscribe($eventName, $listener); |
30
|
|
|
} |
31
|
|
|
} |
32
|
8 |
|
} |
33
|
|
|
|
34
|
|
|
/** |
35
|
|
|
* @param object $event |
36
|
|
|
* @return void |
37
|
|
|
*/ |
38
|
7 |
|
public function emit($event) |
39
|
|
|
{ |
40
|
7 |
|
$eventName = $this->extractEventName($event); |
41
|
7 |
|
$eventListeners = $this->getEventListeners($eventName); |
42
|
7 |
|
$eventMeta = new Meta($event, $eventName, $eventName, $this); |
43
|
7 |
|
foreach ($eventListeners as $listener) { |
44
|
7 |
|
$listener->handle($event, $eventMeta); |
45
|
|
|
} |
46
|
7 |
|
} |
47
|
|
|
|
48
|
|
|
/** |
49
|
|
|
* @param string $eventName |
50
|
|
|
* @param Listener $listener |
51
|
|
|
* @return Subscription |
52
|
|
|
*/ |
53
|
8 |
|
public function subscribe($eventName, Listener $listener) |
54
|
|
|
{ |
55
|
8 |
|
$this->listeners[$eventName][] = $listener; |
56
|
8 |
|
return new Subscription($eventName, $listener, $this); |
57
|
|
|
} |
58
|
|
|
|
59
|
|
|
/** |
60
|
|
|
* @param string $eventName |
61
|
|
|
* @param Listener $listener |
62
|
|
|
* @return bool |
63
|
|
|
*/ |
64
|
4 |
|
public function unsubscribe($eventName, Listener $listener) |
65
|
|
|
{ |
66
|
4 |
|
$eventListeners = $this->getEventListeners($eventName); |
67
|
4 |
|
foreach ($eventListeners as $key => $eventListener) { |
68
|
4 |
|
if ($listener === $eventListener) { |
69
|
4 |
|
unset($this->listeners[$eventName][$key]); |
70
|
4 |
|
return true; |
71
|
|
|
} |
72
|
|
|
} |
73
|
2 |
|
return false; |
74
|
|
|
} |
75
|
|
|
|
76
|
|
|
/** |
77
|
|
|
* @param $event |
78
|
|
|
* @return string |
79
|
|
|
*/ |
80
|
7 |
|
private function extractEventName($event) |
81
|
|
|
{ |
82
|
7 |
|
return $this->eventNameExtractor->extract($event); |
83
|
|
|
} |
84
|
|
|
|
85
|
|
|
/** |
86
|
|
|
* @param string $eventName |
87
|
|
|
* @return Listener[] |
88
|
|
|
*/ |
89
|
8 |
|
private function getEventListeners($eventName) |
90
|
|
|
{ |
91
|
8 |
|
$eventListeners = array_key_exists($eventName, $this->listeners) ? $this->listeners[$eventName] : []; |
92
|
8 |
|
return $eventListeners; |
93
|
|
|
} |
94
|
|
|
} |
95
|
|
|
|