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Facebook.php

188 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 $endpoint = 'https://graph.facebook.com/v8.0/oembed_{type}';
25
26	/** inline {@inheritdoc} */
27	protected static $hosts = [
28	'facebook.com'
29	];
30
31	/** inline {@inheritdoc} */
32	protected $allowedParams = [ 'maxwidth', 'maxheight', 'callback', 'omitscript', 'breaking_change', 'access_token', 'fields' ];
33
34	/** inline {@inheritdoc} */
35	protected $httpsSupport = true;
36
37	/** inline {@inheritdoc} */
38	protected $responsiveSupport = false;
39
40	/** Patterns that match posts urls */
41	protected $postPatterns = [
42	/**
43	* https://www.facebook.com/{page-name}/posts/{post-id}
44	* https://www.facebook.com/{username}/posts/{post-id}
45	* https://www.facebook.com/{username}/activity/{activity-id}
46	*
47	* Undocumented: https://www.facebook.com/{username}/photos/{photo-id}
48	*/
49	'~facebook\.com/(?:[^/]+)/(?:posts\|activity\|photos)/(?:[^/]+)/?~i',
50
51	/**
52	* https://www.facebook.com/notes/{username}/{note-url}/{note-id}
53	*/
54	'~facebook\.com/notes/(?:[^/]+)/(?:[^/]+)/(?:[^/]+)/?~i',
55
56	/**
57	* https://www.facebook.com/photo.php?fbid={photo-id}
58	* https://www.facebook.com/permalink.php?story_fbid={post-id}
59	*/
60	'~facebook\.com/(?:photo\|permalink)\.php\?(?:(story_)?fbid)=(?:[^ ]+)~i',
61
62	/**
63	* https://www.facebook.com/photos/{photo-id}
64	* https://www.facebook.com/questions/{question-id}
65	*/
66	'~facebook\.com/(?:photos\|questions)/(?:[^/ ]+)/?~i',
67
68	/**
69	* NOTE: This url scheme is stated to be supported, however
70	* I havent found any example that work. I'm leaving it
71	* but I suspect that its not valid anymore.. we know how
72	* facebook is with API's :/
73	*
74	* However in order to be really complaint with the documentation
75	* I'm leaving the pattern.
76	*
77	* https://www.facebook.com/media/set?set={set-id}
78	*/
79	'~facebook\.com/media/set/?\?set=(?:[^/ ]+)~i',
80	];
81
82	/** Patterns that match video urls */
83	protected $videoPatterns = [
84	/**
85	* https://www.facebook.com/{page-name}/videos/{video-id}/
86	* https://www.facebook.com/{username}/videos/{video-id}/
87	*/
88	'~facebook\.com/(?:[^/]+)/videos/(?:[^/]+)/?~i',
89
90	/**
91	* https://www.facebook.com/video.php?id={video-id}
92	* https://www.facebook.com/video.php?v={video-id}
93	*/
94	'~facebook\.com/video\.php\?(?:id\|v)=(?:[^ ]+)~i',
95	];
96
97	/** Patterns that match page urls */
98	protected $pagePatterns = array(
99	'~facebook\.com\/\S+[\/]?$~'
100	);
101
102	/**
103	* Checks if $url matches the given list of patterns
104	*
105	* @param string $url
106	* @param array $patternList
107	* @return bool
108	*/
109	protected function urlMatchesPattern($url, array $patternList)
110	{
111	foreach ($patternList as $p) {
112	if (preg_match($p, (string) $url)) {
113	return true;
114	}
115	}
116
117	return false;
118	}
119
120	/** inline {@inheritdoc} */
121	public function validateUrl(Url $url)
122	{
123	return $this->urlMatchesPattern($url, array_merge($this->postPatterns, $this->videoPatterns, $this->pagePatterns));
124	}
125
126	/** inline {@inheritdoc} */
127	public function getEndpoint()
128	{
129	if ($this->urlMatchesPattern($this->url, $this->videoPatterns)) {
130	$type = 'video';
131	} elseif ($this->urlMatchesPattern($this->url, $this->postPatterns)) {
132	$type = 'post';
133	} else {
134	$type = 'page';
135	}
136
137	return str_replace('{type}', $type, $this->endpoint);
138	}
139
140	/** inline {@inheritdoc} */
141	public function normalizeUrl(Url $url)
142	{
143	$url->convertToHttps();
144	return $url;
145	}
146
147	/** inline {@inheritdoc} */
148	public function modifyResponse(array $response = [])
149	{
150	if (!empty($response['html'])) {
151
152	// Backup the real response
153	$response['html_original'] = $response['html'];
154	$embedUrl = 'https://www.facebook.com/plugins/post.php?href={url}&width={width}&height={height}&show_text=true&appId';
155
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(' ', $attr) . '></iframe>';
167	if (!empty($response['height'])) {
168	$height = $response['height'];
169	} else {
170	$height = min(680, (int) ($response['width'] + 100));
171	}
172
173	$table = array(
174	'{url}' => rawurlencode($this->url),
175	'{md5}' => substr(md5($this->url), 0, 5),
176	'{width}' => $response['width'],
177	'{height}' => $height,
178	);
179
180	// Replace the html response
181	$response['html'] = str_replace(array_keys($table), array_values($table), $iframe);
182	}
183
184	return $response;
185	}
186
187	}
188