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Facebook.php

207 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	* Connect with friends and the world around you on Facebook.
20	* This Provider Requires the use of an access_token provided by Facebook.
21	* Example: `$embera = new Embera([ 'facebook_access_token' => 'yourtokenforfacebook' ]);`
22	*
23	* @link https://facebook.com
24	* @see https://developers.facebook.com/docs/plugins/oembed-endpoints
25	*/
26	class Facebook extends ProviderAdapter implements ProviderInterface
27	{
28	/** inline {@inheritdoc} */
29	protected $shouldSendRequest = false;
30	/** inline {@inheritdoc} */
31	protected $endpoint = 'https://graph.facebook.com/v16.0/oembed_{type}';
32
33	/** inline {@inheritdoc} */
34	protected static $hosts = [
35	'facebook.com'
36	];
37
38	/** inline {@inheritdoc} */
39	protected $allowedParams = [ 'maxwidth', 'maxheight', 'callback', 'omitscript', 'breaking_change', 'access_token', 'fields', 'locale' ];
40
41	/** inline {@inheritdoc} */
42	protected $httpsSupport = true;
43
44	/** inline {@inheritdoc} */
45	protected $responsiveSupport = true;
46
47	/** Patterns that match posts urls */
48	protected $postPatterns = [
49	/**
50	* https://www.facebook.com/{page-name}/posts/{post-id}
51	* https://www.facebook.com/{username}/posts/{post-id}
52	* https://www.facebook.com/{username}/activity/{activity-id}
53	*
54	* Undocumented: https://www.facebook.com/{username}/photos/{photo-id}
55	*/
56	'~facebook\.com/(?:[^/]+)/(?:posts\|activity\|photos)/(?:[^/]+)/?~i',
57
58	/**
59	* https://www.facebook.com/notes/{username}/{note-url}/{note-id}
60	*/
61	'~facebook\.com/notes/(?:[^/]+)/(?:[^/]+)/(?:[^/]+)/?~i',
62
63	/**
64	* https://www.facebook.com/photo.php?fbid={photo-id}
65	* https://www.facebook.com/permalink.php?story_fbid={post-id}
66	*/
67	'~facebook\.com/(?:photo\|permalink)\.php\?(?:(story_)?fbid)=(?:[^ ]+)~i',
68
69	/**
70	* https://www.facebook.com/photos/{photo-id}
71	* https://www.facebook.com/questions/{question-id}
72	*/
73	'~facebook\.com/(?:photos\|questions)/(?:[^/ ]+)/?~i',
74
75	/**
76	* NOTE: This url scheme is stated to be supported, however
77	* I havent found any example that work. I'm leaving it
78	* but I suspect that its not valid anymore.. we know how
79	* facebook is with API's :/
80	*
81	* However in order to be really complaint with the documentation
82	* I'm leaving the pattern.
83	*
84	* https://www.facebook.com/media/set?set={set-id}
85	*/
86	'~facebook\.com/media/set/?\?set=(?:[^/ ]+)~i',
87	];
88
89	/** Patterns that match video urls */
90	protected $videoPatterns = [
91	/**
92	* https://www.facebook.com/{page-name}/videos/{video-id}/
93	* https://www.facebook.com/{username}/videos/{video-id}/
94	*/
95	'~facebook\.com/(?:[^/]+)/videos/(?:[^/]+)/?~i',
96
97	/**
98	* https://www.facebook.com/video.php?id={video-id}
99	* https://www.facebook.com/video.php?v={video-id}
100	*/
101	'~facebook\.com/video\.php\?(?:id\|v)=(?:[^ ]+)~i',
102
103	/**
104	* https://www.facebook.com/watch?v={video-id}
105	*/
106	'~facebook\.com/watch\?v=(?:[^ ]+)~i',
107	];
108
109	/** Patterns that match page urls */
110	protected $pagePatterns = array(
111	'~facebook\.com\/\S+[\/]?$~'
112	);
113
114	/**
115	* Checks if $url matches the given list of patterns
116	*
117	* @param string $url
118	* @param array $patternList
119	* @return bool
120	*/
121	protected function urlMatchesPattern($url, array $patternList)
122	{
123	foreach ($patternList as $p) {
124	if (preg_match($p, (string) $url)) {
125	return true;
126	}
127	}
128
129	return false;
130	}
131
132	/** inline {@inheritdoc} */
133	public function validateUrl(Url $url)
134	{
135	return $this->urlMatchesPattern($url, array_merge($this->postPatterns, $this->videoPatterns, $this->pagePatterns));
136	}
137
138	/** inline {@inheritdoc} */
139	public function getEndpoint()
140	{
141	if ($this->urlMatchesPattern($this->url, $this->videoPatterns)) {
142	$type = 'video';
143	} elseif ($this->urlMatchesPattern($this->url, $this->postPatterns)) {
144	$type = 'post';
145	} else {
146	$type = 'page';
147	}
148
149	return str_replace('{type}', $type, $this->endpoint);
150	}
151
152	/** inline {@inheritdoc} */
153	public function normalizeUrl(Url $url)
154	{
155	$url->convertToHttps();
156	return $url;
157	}
158
159	/** inline {@inheritdoc} */
160	public function getStaticResponse() {
161	$response = [];
162	$params =$this->getParams();
163	$embedUrl = 'https://www.facebook.com/plugins/post.php?href={url}&width={width}&height={height}&show_text=true';
164	$height= 680;
165	$width = 500;
166	$attr = [];
167	$attr[] = 'class="embera-facebook-iframe-{md5}"';
168	$attr[] = 'src="' . $embedUrl . '"';
169	$attr[] = 'width="{width}"';
170	$attr[] = 'height="{height}"';
171	$attr[] = 'style="border:none;overflow:hidden"';
172	$attr[] = 'scrolling="no"';
173	$attr[] = 'frameborder="0"';
174	$attr[] = 'allowTransparency="true"';
175
176	$iframe = '<iframe ' . implode(' ', $attr) . '></iframe>';
177	if (!empty($params['maxheight'])) {
178	$height = $params['maxheight'];
179	} else {
180	if (!empty($params['maxwidth'])){
181	$height = min(680, (int) ($params['maxwidth'] + 100));
182	}
183	}
184
185	if (!empty($params['maxwidth'])) {
186	$width = $params['maxwidth'];
187	} else {
188	if (!empty($params['maxheight'])){
189	$width = min(500, (int) ($params['maxheight'] - 100));
190	}
191	}
192
193	$table = array(
194	'{url}' => rawurlencode($this->url),
195	'{md5}' => substr(md5($this->url), 0, 5),
196	'{width}' => $width,
197	'{height}' => $height,
198	);
199
200	// Replace the html response
201	$response['html'] = str_replace(array_keys($table), array_values($table), $iframe);
202
203	return $response;
204	}
205
206	}
207