1
|
|
|
<?php |
2
|
|
|
|
3
|
|
|
/* |
4
|
|
|
* This file is part of the Tidal/WampWatch package. |
5
|
|
|
* (c) 2016 Timo Michna <timomichna/yahoo.de> |
6
|
|
|
* |
7
|
|
|
* For the full copyright and license information, please view the LICENSE |
8
|
|
|
* file that was distributed with this source code. |
9
|
|
|
* |
10
|
|
|
*/ |
11
|
|
|
|
12
|
|
|
namespace Tidal\WampWatch\Subscription; |
13
|
|
|
|
14
|
|
|
use Thruway\Message\SubscribedMessage; |
15
|
|
|
use React\Promise\Deferred; |
16
|
|
|
use React\Promise\Promise; |
17
|
|
|
use Tidal\WampWatch\ClientSessionInterface as ClientSession; |
18
|
|
|
use Tidal\WampWatch\Util; |
19
|
|
|
|
20
|
|
|
class Collection |
21
|
|
|
{ |
22
|
|
|
/** |
23
|
|
|
* The collection's WAMP client session. |
24
|
|
|
* |
25
|
|
|
* @var ClientSession |
26
|
|
|
*/ |
27
|
|
|
private $session; |
28
|
|
|
|
29
|
|
|
/** |
30
|
|
|
* @var array list of subscriptions with topic as key and subscription-id as value |
31
|
|
|
*/ |
32
|
|
|
private $subscriptions = []; |
33
|
|
|
|
34
|
|
|
/** |
35
|
|
|
* @var array list of subscriptions callbacks with topic as key |
36
|
|
|
*/ |
37
|
|
|
private $subscriptionCallbacks = []; |
38
|
|
|
|
39
|
|
|
/** |
40
|
|
|
* @var bool if the collection is successfully subscribed to all topics |
41
|
|
|
*/ |
42
|
|
|
private $isSubscribed = false; |
43
|
|
|
|
44
|
|
|
/** |
45
|
|
|
* @var bool if the collection is currently trying to subscribe to all topics |
46
|
|
|
*/ |
47
|
|
|
private $isSubscribing = false; |
48
|
|
|
|
49
|
|
|
/** |
50
|
|
|
* @var Deferred |
51
|
|
|
*/ |
52
|
|
|
private $subscriptionPromise; |
53
|
|
|
|
54
|
|
|
/** |
55
|
|
|
* Collection constructor. |
56
|
|
|
* |
57
|
|
|
* @param \Tidal\WampWatch\ClientSessionInterface $session |
58
|
|
|
*/ |
59
|
|
|
public function __construct(ClientSession $session) |
60
|
|
|
{ |
61
|
|
|
$this->session = $session; |
62
|
|
|
} |
63
|
|
|
|
64
|
|
|
/** |
65
|
|
|
* @param string $topic the topic the subscription is for |
66
|
|
|
* @param callable $callback the callback for the topic |
67
|
|
|
*/ |
68
|
|
|
public function addSubscription($topic, callable $callback) |
69
|
|
|
{ |
70
|
|
|
$this->subscriptions[$topic] = 0; |
71
|
|
|
$this->subscriptionCallbacks[$topic] = $callback; |
72
|
|
|
} |
73
|
|
|
|
74
|
|
|
/** |
75
|
|
|
* Subscribe to all topics added with 'addSubscription'. |
76
|
|
|
* Returns false if already subscribed or curretly subscribing. |
77
|
|
|
* |
78
|
|
|
* @return \React\Promise\Promise |
79
|
|
|
*/ |
80
|
|
|
public function subscribe() |
81
|
|
|
{ |
82
|
|
|
if (!$this->isSubscribed() && !$this->isSubscribing()) { |
83
|
|
|
$this->isSubscribing = true; |
84
|
|
|
$this->subscriptionPromise = new Deferred(); |
85
|
|
|
$this->doSubscribe(); |
86
|
|
|
} |
87
|
|
|
|
88
|
|
|
return $this->subscriptionPromise->promise(); |
89
|
|
|
} |
90
|
|
|
|
91
|
|
|
/** |
92
|
|
|
* |
93
|
|
|
*/ |
94
|
|
|
protected function doSubscribe() |
95
|
|
|
{ |
96
|
|
|
foreach (array_keys($this->subscriptions) as $topic) { |
97
|
|
|
$this->session->subscribe($topic, $this->subscriptionCallbacks[$topic]) |
98
|
|
|
->done(function (SubscribedMessage $msg) use ($topic) { |
99
|
|
|
$this->subscriptions[$topic] = $msg->getSubscriptionId(); |
100
|
|
|
$this->subscriptionPromise->notify($topic); |
101
|
|
|
|
102
|
|
|
$this->checkSubscribed(); |
103
|
|
|
}); |
104
|
|
|
} |
105
|
|
|
} |
106
|
|
|
|
107
|
|
|
/** |
108
|
|
|
* @return \React\Promise\Promise|\React\Promise\PromiseInterface |
109
|
|
|
*/ |
110
|
|
|
public function unsubscribe() |
111
|
|
|
{ |
112
|
|
|
$resolver = function (callable $resolve) { |
113
|
|
|
$resolve(); |
114
|
|
|
}; |
115
|
|
|
$promise = new Promise($resolver); |
116
|
|
|
|
117
|
|
|
if ($this->isSubscribed()) { |
118
|
|
|
foreach ($this->subscriptions as $topic => $subId) { |
119
|
|
|
Util::unsubscribe($this->session, $subId); |
120
|
|
|
} |
121
|
|
|
|
122
|
|
|
$this->isSubscribed = false; |
123
|
|
|
} |
124
|
|
|
|
125
|
|
|
return $promise; |
126
|
|
|
} |
127
|
|
|
|
128
|
|
|
/** |
129
|
|
|
* @return bool |
130
|
|
|
*/ |
131
|
|
|
public function isSubscribed() |
132
|
|
|
{ |
133
|
|
|
return $this->isSubscribed; |
134
|
|
|
} |
135
|
|
|
|
136
|
|
|
/** |
137
|
|
|
* @return bool |
138
|
|
|
*/ |
139
|
|
|
public function isSubscribing() |
140
|
|
|
{ |
141
|
|
|
return $this->isSubscribing; |
142
|
|
|
} |
143
|
|
|
|
144
|
|
|
/** |
145
|
|
|
* Check if all subscriptions have been successfully confirmed. |
146
|
|
|
*/ |
147
|
|
|
protected function checkSubscribed() |
148
|
|
|
{ |
149
|
|
|
foreach ($this->subscriptions as $topic => $subId) { |
150
|
|
|
if ($subId === 0) { |
151
|
|
|
return false; |
152
|
|
|
} |
153
|
|
|
} |
154
|
|
|
$this->isSubscribed = true; |
155
|
|
|
$this->isSubscribing = false; |
156
|
|
|
$this->subscriptionPromise->resolve($this->subscriptions); |
157
|
|
|
|
158
|
|
|
return true; |
159
|
|
|
} |
160
|
|
|
} |
161
|
|
|
|