|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
declare(strict_types=1); |
|
4
|
|
|
|
|
5
|
|
|
namespace unreal4u\MQTT\Protocol; |
|
6
|
|
|
|
|
7
|
|
|
use unreal4u\MQTT\Application\EmptyReadableResponse; |
|
8
|
|
|
use unreal4u\MQTT\Internals\ClientInterface; |
|
9
|
|
|
use unreal4u\MQTT\Internals\EventManager; |
|
10
|
|
|
use unreal4u\MQTT\Internals\ProtocolBase; |
|
11
|
|
|
use unreal4u\MQTT\Internals\ReadableContentInterface; |
|
12
|
|
|
use unreal4u\MQTT\Internals\WritableContent; |
|
13
|
|
|
use unreal4u\MQTT\Internals\WritableContentInterface; |
|
14
|
|
|
use unreal4u\MQTT\Protocol\Subscribe\Topic; |
|
15
|
|
|
use unreal4u\MQTT\Utilities; |
|
16
|
|
|
|
|
17
|
|
|
final class UnSubscribe extends ProtocolBase implements WritableContentInterface |
|
18
|
|
|
{ |
|
19
|
|
|
use WritableContent; |
|
20
|
|
|
|
|
21
|
|
|
const CONTROL_PACKET_VALUE = 10; |
|
22
|
|
|
|
|
23
|
|
|
private $packetIdentifier = 0; |
|
24
|
|
|
|
|
25
|
|
|
/** |
|
26
|
|
|
* An array of topics on which to subscribe to |
|
27
|
|
|
* @var Topic[] |
|
28
|
|
|
*/ |
|
29
|
|
|
private $topics = []; |
|
30
|
|
|
|
|
31
|
|
|
/** |
|
32
|
|
|
* @return string |
|
33
|
|
|
* @throws \OutOfRangeException |
|
34
|
|
|
* @throws \Exception |
|
35
|
|
|
*/ |
|
36
|
|
|
public function createVariableHeader(): string |
|
37
|
|
|
{ |
|
38
|
|
|
// Subscribe must always send a 2 flag |
|
39
|
|
|
$this->specialFlags = 2; |
|
40
|
|
|
|
|
41
|
|
|
// Assign a packet identifier automatically if none has been assigned yet |
|
42
|
|
|
if ($this->packetIdentifier === 0) { |
|
43
|
|
|
$this->setPacketIdentifier(random_int(0, 65535)); |
|
44
|
|
|
} |
|
45
|
|
|
|
|
46
|
|
|
return Utilities::convertNumberToBinaryString($this->packetIdentifier); |
|
47
|
|
|
} |
|
48
|
|
|
|
|
49
|
|
|
public function createPayload(): string |
|
50
|
|
|
{ |
|
51
|
|
|
$output = ''; |
|
52
|
|
|
foreach ($this->topics as $topic) { |
|
53
|
|
|
// chr on QoS level is safe because it will create an 8-bit flag where the first 6 are only 0's |
|
54
|
|
|
$output .= $this->createUTF8String($topic->getTopicName()) . \chr($topic->getTopicQoSLevel()); |
|
55
|
|
|
} |
|
56
|
|
|
return $output; |
|
57
|
|
|
} |
|
58
|
|
|
|
|
59
|
|
|
/** |
|
60
|
|
|
* When the Server receives a SUBSCRIBE Packet from a Client, the Server MUST respond with a SUBACK Packet |
|
61
|
|
|
* |
|
62
|
|
|
* This can however not be in the same order, as we may be able to receive PUBLISH packets before getting a SUBACK |
|
63
|
|
|
* back |
|
64
|
|
|
* |
|
65
|
|
|
* @see http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/os/mqtt-v3.1.1-os.html#_Toc398718134 (MQTT-3.8.4-1) |
|
66
|
|
|
* @return bool |
|
67
|
|
|
*/ |
|
68
|
|
|
public function shouldExpectAnswer(): bool |
|
69
|
|
|
{ |
|
70
|
|
|
return true; |
|
71
|
|
|
} |
|
72
|
|
|
|
|
73
|
|
|
/** |
|
74
|
|
|
* SUBSCRIBE Control Packets MUST contain a non-zero 16-bit Packet Identifier |
|
75
|
|
|
* |
|
76
|
|
|
* @param int $packetIdentifier |
|
77
|
|
|
* @return Subscribe |
|
78
|
|
|
* @throws \OutOfRangeException |
|
79
|
|
|
*/ |
|
80
|
|
|
public function setPacketIdentifier(int $packetIdentifier): self |
|
81
|
|
|
{ |
|
82
|
|
|
if ($packetIdentifier > 65535 || $packetIdentifier < 1) { |
|
83
|
|
|
throw new \OutOfRangeException('Packet identifier must fit within 2 bytes'); |
|
84
|
|
|
} |
|
85
|
|
|
|
|
86
|
|
|
$this->packetIdentifier = $packetIdentifier; |
|
87
|
|
|
$this->logger->debug('Setting packet identifier', ['current' => $this->packetIdentifier]); |
|
88
|
|
|
|
|
89
|
|
|
return $this; |
|
|
|
|
|
|
90
|
|
|
} |
|
91
|
|
|
|
|
92
|
|
|
public function getPacketIdentifier(): int |
|
93
|
|
|
{ |
|
94
|
|
|
return $this->packetIdentifier; |
|
95
|
|
|
} |
|
96
|
|
|
|
|
97
|
|
|
/** |
|
98
|
|
|
* A subscription is based on filters, this function allows us to pass on filters |
|
99
|
|
|
* |
|
100
|
|
|
* @param Topic[] $topics |
|
101
|
|
|
* @return Subscribe |
|
102
|
|
|
*/ |
|
103
|
|
|
public function addTopics(Topic ...$topics): self |
|
104
|
|
|
{ |
|
105
|
|
|
$this->topics = $topics; |
|
106
|
|
|
$this->logger->debug('Topics added', ['totalTopics', count($this->topics)]); |
|
107
|
|
|
|
|
108
|
|
|
return $this; |
|
|
|
|
|
|
109
|
|
|
} |
|
110
|
|
|
} |
|
111
|
|
|
|
unreal4u /
mqtt
Loading history...