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Facebook.php

197 lines

1	<?php
2	/**
3	* Facebook.php
4	*
5	* @package Embera
6	* @author Michael Pratt <yo@michael-pratt.com>
7	* @link http://www.michael-pratt.com/
8	*
9	* For the full copyright and license information, please view the LICENSE
10	* file that was distributed with this source code.
11	*/
12
13	namespace Embera\Provider;
14
15	use Embera\Url;
16
17	/**
18	* Facebook Provider
19	* @link https://facebook.com
20	*/
21	class Facebook extends ProviderAdapter implements ProviderInterface
22	{
23	/** inline {@inheritdoc} */
24	protected $shouldSendRequest = false;
25	/** inline {@inheritdoc} */
26	protected $endpoint = 'https://graph.facebook.com/v8.0/oembed_{type}';
27
28	/** inline {@inheritdoc} */
29	protected static $hosts = [
30	'facebook.com'
31	];
32
33	/** inline {@inheritdoc} */
34	protected $allowedParams = [ 'maxwidth', 'maxheight', 'callback', 'omitscript', 'breaking_change', 'access_token', 'fields' ];
35
36	/** inline {@inheritdoc} */
37	protected $httpsSupport = true;
38
39	/** inline {@inheritdoc} */
40	protected $responsiveSupport = false;
41
42	/** Patterns that match posts urls */
43	protected $postPatterns = [
44	/**
45	* https://www.facebook.com/{page-name}/posts/{post-id}
46	* https://www.facebook.com/{username}/posts/{post-id}
47	* https://www.facebook.com/{username}/activity/{activity-id}
48	*
49	* Undocumented: https://www.facebook.com/{username}/photos/{photo-id}
50	*/
51	'~facebook\.com/(?:[^/]+)/(?:posts\|activity\|photos)/(?:[^/]+)/?~i',
52
53	/**
54	* https://www.facebook.com/notes/{username}/{note-url}/{note-id}
55	*/
56	'~facebook\.com/notes/(?:[^/]+)/(?:[^/]+)/(?:[^/]+)/?~i',
57
58	/**
59	* https://www.facebook.com/photo.php?fbid={photo-id}
60	* https://www.facebook.com/permalink.php?story_fbid={post-id}
61	*/
62	'~facebook\.com/(?:photo\|permalink)\.php\?(?:(story_)?fbid)=(?:[^ ]+)~i',
63
64	/**
65	* https://www.facebook.com/photos/{photo-id}
66	* https://www.facebook.com/questions/{question-id}
67	*/
68	'~facebook\.com/(?:photos\|questions)/(?:[^/ ]+)/?~i',
69
70	/**
71	* NOTE: This url scheme is stated to be supported, however
72	* I havent found any example that work. I'm leaving it
73	* but I suspect that its not valid anymore.. we know how
74	* facebook is with API's :/
75	*
76	* However in order to be really complaint with the documentation
77	* I'm leaving the pattern.
78	*
79	* https://www.facebook.com/media/set?set={set-id}
80	*/
81	'~facebook\.com/media/set/?\?set=(?:[^/ ]+)~i',
82	];
83
84	/** Patterns that match video urls */
85	protected $videoPatterns = [
86	/**
87	* https://www.facebook.com/{page-name}/videos/{video-id}/
88	* https://www.facebook.com/{username}/videos/{video-id}/
89	*/
90	'~facebook\.com/(?:[^/]+)/videos/(?:[^/]+)/?~i',
91
92	/**
93	* https://www.facebook.com/video.php?id={video-id}
94	* https://www.facebook.com/video.php?v={video-id}
95	*/
96	'~facebook\.com/video\.php\?(?:id\|v)=(?:[^ ]+)~i',
97	];
98
99	/** Patterns that match page urls */
100	protected $pagePatterns = array(
101	'~facebook\.com\/\S+[\/]?$~'
102	);
103
104	/**
105	* Checks if $url matches the given list of patterns
106	*
107	* @param string $url
108	* @param array $patternList
109	* @return bool
110	*/
111	protected function urlMatchesPattern($url, array $patternList)
112	{
113	foreach ($patternList as $p) {
114	if (preg_match($p, (string) $url)) {
115	return true;
116	}
117	}
118
119	return false;
120	}
121
122	/** inline {@inheritdoc} */
123	public function validateUrl(Url $url)
124	{
125	return $this->urlMatchesPattern($url, array_merge($this->postPatterns, $this->videoPatterns, $this->pagePatterns));
126	}
127
128	/** inline {@inheritdoc} */
129	public function getEndpoint()
130	{
131	if ($this->urlMatchesPattern($this->url, $this->videoPatterns)) {
132	$type = 'video';
133	} elseif ($this->urlMatchesPattern($this->url, $this->postPatterns)) {
134	$type = 'post';
135	} else {
136	$type = 'page';
137	}
138
139	return str_replace('{type}', $type, $this->endpoint);
140	}
141
142	/** inline {@inheritdoc} */
143	public function normalizeUrl(Url $url)
144	{
145	$url->convertToHttps();
146	return $url;
147	}
148
149	/** inline {@inheritdoc} */
150	public function getStaticResponse() {
151	$response = [];
152	$params =$this->getParams();
153	$embedUrl = 'https://www.facebook.com/plugins/post.php?href={url}&width={width}&height={height}&show_text=true';
154	$height= 680;
155	$width = 500;
156	$attr = [];
157	$attr[] = 'class="embera-facebook-iframe-{md5}"';
158	$attr[] = 'src="' . $embedUrl . '"';
159	$attr[] = 'width="{width}"';
160	$attr[] = 'height="{height}"';
161	$attr[] = 'style="border:none;overflow:hidden"';
162	$attr[] = 'scrolling="no"';
163	$attr[] = 'frameborder="0"';
164	$attr[] = 'allowTransparency="true"';
165
166	$iframe = '<iframe ' . implode(' ', $attr) . '></iframe>';
167	if (!empty($params['maxheight'])) {
168	$height = $params['maxheight'];
169	} else {
170	if (!empty($params['maxwidth'])){
171	$height = min(680, (int) ($params['maxwidth'] + 100));
172	}
173	}
174
175	if (!empty($params['maxwidth'])) {
176	$width = $params['maxwidth'];
177	} else {
178	if (!empty($params['maxheight'])){
179	$width = min(500, (int) ($params['maxheight'] - 100));
180	}
181	}
182
183	$table = array(
184	'{url}' => rawurlencode($this->url),
185	'{md5}' => substr(md5($this->url), 0, 5),
186	'{width}' => $width,
187	'{height}' => $height,
188	);
189
190	// Replace the html response
191	$response['html'] = str_replace(array_keys($table), array_values($table), $iframe);
192
193	return $response;
194	}
195
196	}
197