1
|
|
|
<?php |
2
|
|
|
|
3
|
|
|
namespace NotificationChannels\Facebook; |
4
|
|
|
|
5
|
|
|
use Exception; |
6
|
|
|
use GuzzleHttp\Client as HttpClient; |
7
|
|
|
use GuzzleHttp\Exception\ClientException; |
8
|
|
|
use GuzzleHttp\Exception\GuzzleException; |
9
|
|
|
use NotificationChannels\Facebook\Exceptions\CouldNotSendNotification; |
10
|
|
|
use Psr\Http\Message\ResponseInterface; |
11
|
|
|
|
12
|
|
|
/** |
13
|
|
|
* Class Facebook. |
14
|
|
|
*/ |
15
|
|
|
class Facebook |
16
|
|
|
{ |
17
|
|
|
/** @var HttpClient HTTP Client */ |
18
|
|
|
protected $http; |
19
|
|
|
|
20
|
|
|
/** @var string|null Page Token. */ |
21
|
|
|
protected $token; |
22
|
|
|
|
23
|
|
|
/** @var string|null App Secret */ |
24
|
|
|
protected $secret; |
25
|
|
|
|
26
|
|
|
/** @var string Default Graph API Version */ |
27
|
|
|
protected $graphApiVersion = '4.0'; |
28
|
|
|
|
29
|
|
|
/** |
30
|
|
|
* @param string|null $token |
31
|
|
|
* @param HttpClient|null $httpClient |
32
|
|
|
*/ |
33
|
|
|
public function __construct(string $token = null, HttpClient $httpClient = null) |
34
|
|
|
{ |
35
|
|
|
$this->token = $token; |
36
|
|
|
|
37
|
|
|
$this->http = $httpClient; |
38
|
|
|
} |
39
|
|
|
|
40
|
|
|
/** |
41
|
|
|
* Set Default Graph API Version. |
42
|
|
|
* |
43
|
|
|
* @param $graphApiVersion |
44
|
|
|
* |
45
|
|
|
* @return Facebook |
46
|
|
|
*/ |
47
|
|
|
public function setGraphApiVersion($graphApiVersion): self |
48
|
|
|
{ |
49
|
|
|
$this->graphApiVersion = $graphApiVersion; |
50
|
|
|
|
51
|
|
|
return $this; |
52
|
|
|
} |
53
|
|
|
|
54
|
|
|
/** |
55
|
|
|
* Set App Secret to generate appsecret_proof. |
56
|
|
|
* |
57
|
|
|
* @param string $secret |
58
|
|
|
* |
59
|
|
|
* @return Facebook |
60
|
|
|
*/ |
61
|
|
|
public function setSecret($secret = null): self |
62
|
|
|
{ |
63
|
|
|
$this->secret = $secret; |
64
|
|
|
|
65
|
|
|
return $this; |
66
|
|
|
} |
67
|
|
|
|
68
|
|
|
/** |
69
|
|
|
* Get HttpClient. |
70
|
|
|
* |
71
|
|
|
* @return HttpClient |
72
|
|
|
*/ |
73
|
|
|
protected function httpClient(): HttpClient |
74
|
|
|
{ |
75
|
|
|
return $this->http ?? new HttpClient(); |
76
|
|
|
} |
77
|
|
|
|
78
|
|
|
/** |
79
|
|
|
* Send text message. |
80
|
|
|
* |
81
|
|
|
* @param array $params |
82
|
|
|
* |
83
|
|
|
* @throws GuzzleException |
84
|
|
|
* @throws CouldNotSendNotification |
85
|
|
|
* @return ResponseInterface |
86
|
|
|
*/ |
87
|
|
|
public function send(array $params): ResponseInterface |
88
|
|
|
{ |
89
|
|
|
return $this->post('me/messages', $params); |
90
|
|
|
} |
91
|
|
|
|
92
|
|
|
/** |
93
|
|
|
* @param string $endpoint |
94
|
|
|
* @param array $params |
95
|
|
|
* |
96
|
|
|
* @throws GuzzleException |
97
|
|
|
* @throws CouldNotSendNotification |
98
|
|
|
* @return ResponseInterface |
99
|
|
|
*/ |
100
|
|
|
public function get(string $endpoint, array $params = []): ResponseInterface |
101
|
|
|
{ |
102
|
|
|
return $this->api($endpoint, ['query' => $params]); |
103
|
|
|
} |
104
|
|
|
|
105
|
|
|
/** |
106
|
|
|
* @param string $endpoint |
107
|
|
|
* @param array $params |
108
|
|
|
* |
109
|
|
|
* @throws GuzzleException |
110
|
|
|
* @throws CouldNotSendNotification |
111
|
|
|
* @return ResponseInterface |
112
|
|
|
*/ |
113
|
|
|
public function post(string $endpoint, array $params = []): ResponseInterface |
114
|
|
|
{ |
115
|
|
|
return $this->api($endpoint, ['json' => $params], 'POST'); |
116
|
|
|
} |
117
|
|
|
|
118
|
|
|
/** |
119
|
|
|
* Send an API request and return response. |
120
|
|
|
* |
121
|
|
|
* @param string $endpoint |
122
|
|
|
* @param array $options |
123
|
|
|
* @param string $method |
124
|
|
|
* |
125
|
|
|
* @throws GuzzleException |
126
|
|
|
* @throws CouldNotSendNotification |
127
|
|
|
* @return mixed|ResponseInterface |
128
|
|
|
*/ |
129
|
|
|
protected function api(string $endpoint, array $options, $method = 'GET') |
130
|
|
|
{ |
131
|
|
|
if (empty($this->token)) { |
132
|
|
|
throw CouldNotSendNotification::facebookPageTokenNotProvided('You must provide your Facebook Page token to make any API requests.'); |
133
|
|
|
} |
134
|
|
|
|
135
|
|
|
$url = "https://graph.facebook.com/v{$this->graphApiVersion}/{$endpoint}?access_token={$this->token}"; |
136
|
|
|
|
137
|
|
|
if ($this->secret) { |
|
|
|
|
138
|
|
|
$appsecret_proof = hash_hmac('sha256', $this->token, $this->secret); |
139
|
|
|
|
140
|
|
|
$url .= "&appsecret_proof={$appsecret_proof}"; |
141
|
|
|
} |
142
|
|
|
|
143
|
|
|
try { |
144
|
|
|
return $this->httpClient()->request($method, $url, $options); |
145
|
|
|
} catch (ClientException $exception) { |
146
|
|
|
throw CouldNotSendNotification::facebookRespondedWithAnError($exception); |
147
|
|
|
} catch (Exception $exception) { |
148
|
|
|
throw CouldNotSendNotification::couldNotCommunicateWithFacebook($exception); |
149
|
|
|
} |
150
|
|
|
} |
151
|
|
|
} |
152
|
|
|
|
In PHP, under loose comparison (like
==
, or!=
, orswitch
conditions), values of different types might be equal.For
string
values, the empty string''
is a special case, in particular the following results might be unexpected: