functions.opengraph.php — Jetpack – WP Security, Backup, Speed, & Growth 4.6.3

jetpack / functions.opengraph.php

jetpack Last commit date

functions.opengraph.php

440 lines

1	<?php
2	/**
3	* Open Graph Tags
4	*
5	* Add Open Graph tags so that Facebook (and any other service that supports them)
6	* can crawl the site better and we provide a better sharing experience.
7	*
8	* @link http://ogp.me/
9	* @link http://developers.facebook.com/docs/opengraph/
10	*/
11	add_action( 'wp_head', 'jetpack_og_tags' );
12
13	function jetpack_og_tags() {
14	/**
15	* Allow Jetpack to output Open Graph Meta Tags.
16	*
17	* @module sharedaddy, publicize
18	*
19	* @since 2.0.0
20	* @deprecated 2.0.3 Duplicative filter. Use `jetpack_enable_open_graph`.
21	*
22	* @param bool true Should Jetpack's Open Graph Meta Tags be enabled. Default to true.
23	*/
24	if ( false === apply_filters( 'jetpack_enable_opengraph', true ) ) {
25	_deprecated_function( 'jetpack_enable_opengraph', '2.0.3', 'jetpack_enable_open_graph' );
26	return;
27	}
28
29	// Disable the widont filter on WP.com to avoid stray &nbsps
30	$disable_widont = remove_filter( 'the_title', 'widont' );
31
32	$og_output = "\n<!-- Jetpack Open Graph Tags -->\n";
33	$tags = array();
34
35	/**
36	* Filter the minimum width of the images used in Jetpack Open Graph Meta Tags.
37	*
38	* @module sharedaddy, publicize
39	*
40	* @since 2.0.0
41	*
42	* @param int 200 Minimum image width used in Jetpack Open Graph Meta Tags.
43	*/
44	$image_width = absint( apply_filters( 'jetpack_open_graph_image_width', 200 ) );
45	/**
46	* Filter the minimum height of the images used in Jetpack Open Graph Meta Tags.
47	*
48	* @module sharedaddy, publicize
49	*
50	* @since 2.0.0
51	*
52	* @param int 200 Minimum image height used in Jetpack Open Graph Meta Tags.
53	*/
54	$image_height = absint( apply_filters( 'jetpack_open_graph_image_height', 200 ) );
55	$description_length = 197;
56
57	if ( is_home() \|\| is_front_page() ) {
58	$site_type = Jetpack_Options::get_option_and_ensure_autoload( 'open_graph_protocol_site_type', '' );
59	$tags['og:type'] = ! empty( $site_type ) ? $site_type : 'website';
60	$tags['og:title'] = get_bloginfo( 'name' );
61	$tags['og:description'] = get_bloginfo( 'description' );
62
63	$front_page_id = get_option( 'page_for_posts' );
64	if ( 'page' == get_option( 'show_on_front' ) && $front_page_id && is_home() )
65	$tags['og:url'] = get_permalink( $front_page_id );
66	else
67	$tags['og:url'] = home_url( '/' );
68
69	// Associate a blog's root path with one or more Facebook accounts
70	$facebook_admins = Jetpack_Options::get_option_and_ensure_autoload( 'facebook_admins', array() );
71	if ( ! empty( $facebook_admins ) )
72	$tags['fb:admins'] = $facebook_admins;
73
74	} else if ( is_author() ) {
75	$tags['og:type'] = 'profile';
76
77	$author = get_queried_object();
78
79	$tags['og:title'] = $author->display_name;
80	if ( ! empty( $author->user_url ) ) {
81	$tags['og:url'] = $author->user_url;
82	} else {
83	$tags['og:url'] = get_author_posts_url( $author->ID );
84	}
85	$tags['og:description'] = $author->description;
86	$tags['profile:first_name'] = get_the_author_meta( 'first_name', $author->ID );
87	$tags['profile:last_name'] = get_the_author_meta( 'last_name', $author->ID );
88
89	} else if ( is_singular() ) {
90	global $post;
91	$data = $post; // so that we don't accidentally explode the global
92
93	$tags['og:type'] = 'article';
94	if ( empty( $data->post_title ) ) {
95	$tags['og:title'] = ' ';
96	} else {
97	/** This filter is documented in core/src/wp-includes/post-template.php */
98	$tags['og:title'] = wp_kses( apply_filters( 'the_title', $data->post_title, $data->ID ), array() );
99	}
100
101	$tags['og:url'] = get_permalink( $data->ID );
102	if ( ! post_password_required() ) {
103	if ( ! empty( $data->post_excerpt ) ) {
104	$tags['og:description'] = preg_replace( '@https?://[\S]+@', '', strip_shortcodes( wp_kses( $data->post_excerpt, array() ) ) );
105	} else {
106	$exploded_content_on_more_tag = explode( '<!--more-->', $data->post_content );
107	$tags['og:description'] = wp_trim_words( preg_replace( '@https?://[\S]+@', '', strip_shortcodes( wp_kses( $exploded_content_on_more_tag[0], array() ) ) ) );
108	}
109	}
110	if ( empty( $tags['og:description'] ) ) {
111	/**
112	* Filter the fallback `og:description` used when no excerpt information is provided.
113	*
114	* @module sharedaddy, publicize
115	*
116	* @since 3.9.0
117	*
118	* @param string $var Fallback og:description. Default is translated `Visit the post for more'.
119	* @param object $data Post object for the current post.
120	*/
121	$tags['og:description'] = apply_filters( 'jetpack_open_graph_fallback_description', __( 'Visit the post for more.', 'jetpack' ), $data );
122	} else {
123	// Intentionally not using a filter to prevent pollution. @see https://github.com/Automattic/jetpack/pull/2899#issuecomment-151957382
124	$tags['og:description'] = wp_kses( trim( convert_chars( wptexturize( $tags['og:description'] ) ) ), array() );
125	}
126
127	$tags['article:published_time'] = date( 'c', strtotime( $data->post_date_gmt ) );
128	$tags['article:modified_time'] = date( 'c', strtotime( $data->post_modified_gmt ) );
129	if ( post_type_supports( get_post_type( $data ), 'author' ) && isset( $data->post_author ) ) {
130	$publicize_facebook_user = get_post_meta( $data->ID, '_publicize_facebook_user', true );
131	if ( ! empty( $publicize_facebook_user ) ) {
132	$tags['article:author'] = esc_url( $publicize_facebook_user );
133	}
134	}
135	}
136
137	/**
138	* Allow plugins to inject additional template-specific Open Graph tags.
139	*
140	* @module sharedaddy, publicize
141	*
142	* @since 3.0.0
143	*
144	* @param array $tags Array of Open Graph Meta tags.
145	* @param array $args Array of image size parameters.
146	*/
147	$tags = apply_filters( 'jetpack_open_graph_base_tags', $tags, compact( 'image_width', 'image_height' ) );
148
149	// Re-enable widont if we had disabled it
150	if ( $disable_widont )
151	add_filter( 'the_title', 'widont' );
152
153	/**
154	* Do not return any Open Graph Meta tags if we don't have any info about a post.
155	*
156	* @module sharedaddy, publicize
157	*
158	* @since 3.0.0
159	*
160	* @param bool true Do not return any Open Graph Meta tags if we don't have any info about a post.
161	*/
162	if ( empty( $tags ) && apply_filters( 'jetpack_open_graph_return_if_empty', true ) )
163	return;
164
165	$tags['og:site_name'] = get_bloginfo( 'name' );
166
167	// Get image info and build tags
168	if ( ! post_password_required() ) {
169	$image_info = jetpack_og_get_image( $image_width, $image_height );
170	$tags['og:image'] = $image_info['src'];
171
172	if ( ! empty( $image_info['width'] ) ) {
173	$tags['og:image:width'] = $image_info['width'];
174	}
175	if ( ! empty( $image_info['height'] ) ) {
176	$tags['og:image:height'] = $image_info['height'];
177	}
178	}
179
180	// Facebook whines if you give it an empty title
181	if ( empty( $tags['og:title'] ) )
182	$tags['og:title'] = __( '(no title)', 'jetpack' );
183
184	// Shorten the description if it's too long
185	if ( isset( $tags['og:description'] ) ) {
186	$tags['og:description'] = strlen( $tags['og:description'] ) > $description_length ? mb_substr( $tags['og:description'], 0, $description_length ) . '…' : $tags['og:description'];
187	}
188
189	// Try to add OG locale tag if the WP->FB data mapping exists
190	if ( defined( 'JETPACK__GLOTPRESS_LOCALES_PATH' ) && file_exists( JETPACK__GLOTPRESS_LOCALES_PATH ) ) {
191	require_once JETPACK__GLOTPRESS_LOCALES_PATH;
192	$_locale = get_locale();
193
194	// We have to account for w.org vs WP.com locale divergence
195	if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) {
196	$gp_locale = GP_Locales::by_field( 'slug', $_locale );
197	} else {
198	$gp_locale = GP_Locales::by_field( 'wp_locale', $_locale );
199	}
200	}
201
202	if ( isset( $gp_locale->facebook_locale ) && ! empty( $gp_locale->facebook_locale ) ) {
203	$tags['og:locale'] = $gp_locale->facebook_locale;
204	}
205
206	/**
207	* Allow the addition of additional Open Graph Meta tags, or modify the existing tags.
208	*
209	* @module sharedaddy, publicize
210	*
211	* @since 2.0.0
212	*
213	* @param array $tags Array of Open Graph Meta tags.
214	* @param array $args Array of image size parameters.
215	*/
216	$tags = apply_filters( 'jetpack_open_graph_tags', $tags, compact( 'image_width', 'image_height' ) );
217
218	// secure_urls need to go right after each og:image to work properly so we will abstract them here
219	$secure = $tags['og:image:secure_url'] = ( empty( $tags['og:image:secure_url'] ) ) ? '' : $tags['og:image:secure_url'];
220	unset( $tags['og:image:secure_url'] );
221	$secure_image_num = 0;
222
223	foreach ( (array) $tags as $tag_property => $tag_content ) {
224	// to accommodate multiple images
225	$tag_content = (array) $tag_content;
226	$tag_content = array_unique( $tag_content );
227
228	foreach ( $tag_content as $tag_content_single ) {
229	if ( empty( $tag_content_single ) )
230	continue; // Don't ever output empty tags
231	$og_tag = sprintf( '<meta property="%s" content="%s" />', esc_attr( $tag_property ), esc_attr( $tag_content_single ) );
232	/**
233	* Filter the HTML Output of each Open Graph Meta tag.
234	*
235	* @module sharedaddy, publicize
236	*
237	* @since 2.0.0
238	*
239	* @param string $og_tag HTML HTML Output of each Open Graph Meta tag.
240	*/
241	$og_output .= apply_filters( 'jetpack_open_graph_output', $og_tag );
242	$og_output .= "\n";
243
244	if ( 'og:image' == $tag_property ) {
245	if ( is_array( $secure ) && !empty( $secure[$secure_image_num] ) ) {
246	$og_tag = sprintf( '<meta property="og:image:secure_url" content="%s" />', esc_url( $secure[ $secure_image_num ] ) );
247	/** This filter is documented in functions.opengraph.php */
248	$og_output .= apply_filters( 'jetpack_open_graph_output', $og_tag );
249	$og_output .= "\n";
250	} else if ( !is_array( $secure ) && !empty( $secure ) ) {
251	$og_tag = sprintf( '<meta property="og:image:secure_url" content="%s" />', esc_url( $secure ) );
252	/** This filter is documented in functions.opengraph.php */
253	$og_output .= apply_filters( 'jetpack_open_graph_output', $og_tag );
254	$og_output .= "\n";
255	}
256	$secure_image_num++;
257	}
258	}
259	}
260	echo $og_output;
261	}
262
263	function jetpack_og_get_image( $width = 200, $height = 200, $max_images = 4 ) { // Facebook requires thumbnails to be a minimum of 200x200
264	$image = array();
265
266	if ( is_singular() && ! is_home() ) {
267	// Grab obvious image if post is an attachment page for an image
268	if ( is_attachment( get_the_ID() ) && 'image' == substr( get_post_mime_type(), 0, 5 ) ) {
269	$image['src'] = wp_get_attachment_url( get_the_ID() );
270	}
271
272	// Attempt to find something good for this post using our generalized PostImages code
273	if ( empty( $image ) && class_exists( 'Jetpack_PostImages' ) ) {
274	$post_images = Jetpack_PostImages::get_images( get_the_ID(), array( 'width' => $width, 'height' => $height ) );
275	if ( $post_images && ! is_wp_error( $post_images ) ) {
276	foreach ( (array) $post_images as $post_image ) {
277	$image['src'] = $post_image['src'];
278	if ( isset( $post_image['src_width'], $post_image['src_height'] ) ) {
279	$image['width'] = $post_image['src_width'];
280	$image['height'] = $post_image['src_height'];
281	}
282	}
283	}
284	}
285	} else if ( is_author() ) {
286	$author = get_queried_object();
287	if ( function_exists( 'get_avatar_url' ) ) {
288	// Prefer the core function get_avatar_url() if available, WP 4.2+
289	$image['src'] = get_avatar_url( $author->user_email, array( 'size' => $width ) );
290	}
291	else {
292	$has_filter = has_filter( 'pre_option_show_avatars', '__return_true' );
293	if ( ! $has_filter ) {
294	add_filter( 'pre_option_show_avatars', '__return_true' );
295	}
296	$avatar = get_avatar( $author->user_email, $width );
297	if ( ! $has_filter ) {
298	remove_filter( 'pre_option_show_avatars', '__return_true' );
299	}
300
301	if ( ! empty( $avatar ) && ! is_wp_error( $avatar ) ) {
302	if ( preg_match( '/src=["\']([^"\']+)["\']/', $avatar, $matches ) );
303	$image['src'] = wp_specialchars_decode( $matches[1], ENT_QUOTES );
304	}
305	}
306	}
307
308	// First fall back, blavatar
309	if ( empty( $image ) && function_exists( 'blavatar_domain' ) ) {
310	$blavatar_domain = blavatar_domain( site_url() );
311	if ( blavatar_exists( $blavatar_domain ) ) {
312	$image_url = blavatar_url( $blavatar_domain, 'img', $width, false, true );
313
314	$img_width = '';
315	$img_height = '';
316	$image_id = attachment_url_to_postid( $image_url );
317	$image_size = wp_get_attachment_image_src( $image_id, $width >= 512
318	? 'full'
319	: array( $width, $width ) );
320	if ( isset( $image_size[1], $image_size[2] ) ) {
321	$img_width = $image_size[1];
322	$img_height = $image_size[2];
323	}
324
325	if (_jetpack_og_get_image_validate_size($img_width, $img_height, $width, $height)) {
326	$image['src'] = $image_url;
327	$image['width'] = $width;
328	$image['height'] = $height;
329	}
330	}
331	}
332
333	// Second fall back, Site Logo
334	if ( empty( $image ) && ( function_exists( 'jetpack_has_site_logo' ) && jetpack_has_site_logo() ) ) {
335	$image_dimensions = jetpack_get_site_logo_dimensions();
336	if ( ! empty( $image_dimensions ) ) {
337	$img_width = $image_dimensions['width'];
338	$img_height = $image_dimensions['height'];
339	if (_jetpack_og_get_image_validate_size($img_width, $img_height, $width, $height)) {
340	$image['src'] = jetpack_get_site_logo( 'url' );
341	$image['width'] = $width;
342	$image['height'] = $height;
343	}
344	}
345	}
346
347	// Third fall back, Core Site Icon, if valid in size. Added in WP 4.3.
348	if ( empty( $image ) && ( function_exists( 'has_site_icon') && has_site_icon() ) ) {
349	$max_side = max( $width, $height );
350	$image_url = get_site_icon_url( $max_side );
351
352	$img_width = '';
353	$img_height = '';
354	$image_id = attachment_url_to_postid( $image_url );
355	$image_size = wp_get_attachment_image_src( $image_id, $max_side >= 512
356	? 'full'
357	: array( $max_side, $max_side ) );
358	if ( isset( $image_size[1], $image_size[2] ) ) {
359	$img_width = $image_size[1];
360	$img_height = $image_size[2];
361	}
362
363	if (_jetpack_og_get_image_validate_size($img_width, $img_height, $width, $height)) {
364	$image['src'] = $image_url;
365	$image['width'] = $width;
366	$image['height'] = $height;
367	}
368	}
369
370	// Finally fall back, blank image
371	if ( empty( $image ) ) {
372	/**
373	* Filter the default Open Graph Image tag, used when no Image can be found in a post.
374	*
375	* @since 3.0.0
376	*
377	* @param string $str Default Image URL.
378	*/
379	$image['src'] = apply_filters( 'jetpack_open_graph_image_default', 'https://s0.wp.com/i/blank.jpg' );
380	}
381
382	return $image;
383	}
384
385
386	/**
387	* Validate the width and height against required width and height
388	*
389	* @param $width int Width of the image
390	* @param $height int Height of the image
391	* @param $req_width int Required width to pass validation
392	* @param $req_height int Required height to pass validation
393	* @return bool - True if the image passed the required size validation
394	*/
395	function _jetpack_og_get_image_validate_size($width, $height, $req_width, $req_height) {
396	if (!$width \|\| !$height) {
397	return false;
398	}
399
400	$valid_width = ( $width >= $req_width );
401	$valid_height = ( $height >= $req_height );
402	$is_image_acceptable = $valid_width && $valid_height;
403	return $is_image_acceptable;
404	}
405
406	/**
407	* @param $email
408	* @param $width
409	* @return array\|bool\|mixed\|string
410	*/
411	function jetpack_og_get_image_gravatar( $email, $width ) {
412	$image = '';
413	if ( function_exists( 'get_avatar_url' ) ) {
414	$avatar = get_avatar_url( $email, $width );
415	if ( ! empty( $avatar ) ) {
416	if ( is_array( $avatar ) )
417	$image = $avatar[0];
418	else
419	$image = $avatar;
420	}
421	} else {
422	$has_filter = has_filter( 'pre_option_show_avatars', '__return_true' );
423	if ( !$has_filter ) {
424	add_filter( 'pre_option_show_avatars', '__return_true' );
425	}
426	$avatar = get_avatar( $email, $width );
427
428	if ( !$has_filter ) {
429	remove_filter( 'pre_option_show_avatars', '__return_true' );
430	}
431
432	if ( !empty( $avatar ) && !is_wp_error( $avatar ) ) {
433	if ( preg_match( '/src=["\']([^"\']+)["\']/', $avatar, $matches ) )
434	$image = wp_specialchars_decode($matches[1], ENT_QUOTES);
435	}
436	}
437
438	return $image;
439	}
440