← All changes | modules/shortcodes/facebook.php +201 -0 16.2-beta → 16.3 View file →

		@@ -1,0 +1,201 @@
	1	+<?php
	2	+/**
	3	+ * Facebook embeds
	4	+ *
	5	+ * @package automattic/jetpack
	6	+ */
	7	+
	8	+if ( ! defined( 'ABSPATH' ) ) {
	9	+ exit( 0 );
	10	+}
	11	+
	12	+define( 'JETPACK_FACEBOOK_EMBED_REGEX', '#^https?://(www.)?facebook\.com/([^/]+)/(posts|photos)/([^/]+)?#' );
	13	+define( 'JETPACK_FACEBOOK_ALTERNATE_EMBED_REGEX', '#^https?://(www.)?facebook\.com/permalink.php\?([^\s]+)#' );
	14	+define( 'JETPACK_FACEBOOK_PHOTO_EMBED_REGEX', '#^https?://(www.)?facebook\.com/photo.php\?([^\s]+)#' );
	15	+define( 'JETPACK_FACEBOOK_PHOTO_ALTERNATE_EMBED_REGEX', '#^https?://(www.)?facebook\.com/([^/]+)/photos/([^/]+)?#' );
	16	+define( 'JETPACK_FACEBOOK_VIDEO_EMBED_REGEX', '#^https?://(www.)?facebook\.com/(?:video.php|watch\/?)\?([^\s]+)#' );
	17	+define( 'JETPACK_FACEBOOK_VIDEO_ALTERNATE_EMBED_REGEX', '#^https?://(www.)?facebook\.com/([^/]+)/videos/([^/]+)?#' );
	18	+
	19	+/*
	20	+ * Example URL: https://www.facebook.com/VenusWilliams/posts/10151647007373076
	21	+ */
	22	+wp_embed_register_handler( 'facebook', JETPACK_FACEBOOK_EMBED_REGEX, 'jetpack_facebook_embed_handler' );
	23	+
	24	+/*
	25	+ * Example URL: https://www.facebook.com/permalink.php?id=222622504529111&story_fbid=559431180743788
	26	+ */
	27	+wp_embed_register_handler( 'facebook-alternate', JETPACK_FACEBOOK_ALTERNATE_EMBED_REGEX, 'jetpack_facebook_embed_handler' );
	28	+
	29	+/*
	30	+ * Photos are handled on a different endpoint; e.g. https://www.facebook.com/photo.php?fbid=10151609960150073&set=a.398410140072.163165.106666030072&type=1
	31	+ */
	32	+wp_embed_register_handler( 'facebook-photo', JETPACK_FACEBOOK_PHOTO_EMBED_REGEX, 'jetpack_facebook_embed_handler' );
	33	+
	34	+/*
	35	+ * Photos (from pages for example) can be at
	36	+ */
	37	+wp_embed_register_handler( 'facebook-alternate-photo', JETPACK_FACEBOOK_PHOTO_ALTERNATE_EMBED_REGEX, 'jetpack_facebook_embed_handler' );
	38	+
	39	+/*
	40	+ * Videos
	41	+ *
	42	+ * Formats:
	43	+ * https://www.facebook.com/video.php?v=2836814009877992
	44	+ * https://www.facebook.com/watch/?v=2836814009877992
	45	+ */
	46	+wp_embed_register_handler( 'facebook-video', JETPACK_FACEBOOK_VIDEO_EMBED_REGEX, 'jetpack_facebook_embed_handler' );
	47	+
	48	+/*
	49	+ * Videos https://www.facebook.com/WhiteHouse/videos/10153398464269238/
	50	+ */
	51	+wp_embed_register_handler( 'facebook-alternate-video', JETPACK_FACEBOOK_VIDEO_ALTERNATE_EMBED_REGEX, 'jetpack_facebook_embed_handler' );
	52	+
	53	+/**
	54	+ * Callback to modify output of embedded Facebook posts.
	55	+ *
	56	+ * @param array $matches Regex partial matches against the URL passed.
	57	+ * @param array $attr Attributes received in embed response.
	58	+ * @param string $url Requested URL to be embedded.
	59	+ * @return string Facebook embed markup.
	60	+ */
	61	+function jetpack_facebook_embed_handler( $matches, $attr, $url ) {
	62	+ // This is a stop-gap solution until Facebook hopefully resolves this ticket
	63	+ // https://developers.facebook.com/community/threads/1675075423353415/?post_id=1675075426686748
	64	+ $extra_styles = 'style="background-color: #fff; display: inline-block;"';
	65	+
	66	+ if (
	67	+ str_contains( $url, 'video.php' )
	68	+ || str_contains( $url, '/videos/' )
	69	+ || str_contains( $url, '/watch' )
	70	+ ) {
	71	+ $embed = sprintf(
	72	+ '<div class="fb-video" data-allowfullscreen="true" data-href="%1$s" %2$s></div>',
	73	+ esc_url( $url ),
	74	+ $extra_styles
	75	+ );
	76	+ } else {
	77	+ $width = 552; // As of 01/2017, the default width of Facebook embeds when no width attribute provided.
	78	+
	79	+ global $content_width;
	80	+ if ( is_numeric( $content_width ) && $content_width > 0 ) {
	81	+ $width = min( $width, $content_width );
	82	+ }
	83	+
	84	+ $embed = sprintf(
	85	+ '<div class="fb-post" data-href="%1$s" data-width="%2$s" %3$s></div>',
	86	+ esc_url( $url ),
	87	+ esc_attr( $width ),
	88	+ $extra_styles
	89	+ );
	90	+ }
	91	+
	92	+ // Skip rendering scripts in an AMP context.
	93	+ if ( class_exists( 'Jetpack_AMP_Support' ) && Jetpack_AMP_Support::is_amp_request() ) {
	94	+ return $embed;
	95	+ }
	96	+
	97	+ // since Facebook is a faux embed, we need to load the JS SDK in the wpview embed iframe.
	98	+ if (
	99	+ defined( 'DOING_AJAX' )
	100	+ && DOING_AJAX
	101	+ // No need to check for a nonce here, that's already handled by Core further up.
	102	+ && ! empty( $_POST['action'] ) // phpcs:ignore WordPress.Security.NonceVerification.Missing
	103	+ && 'parse-embed' === $_POST['action'] // phpcs:ignore WordPress.Security.NonceVerification.Missing
	104	+ ) {
	105	+ ob_start();
	106	+ wp_scripts()->do_items( array( 'jetpack-facebook-embed' ) );
	107	+ $scripts = ob_get_clean();
	108	+ return $embed . $scripts;
	109	+ } else {
	110	+ wp_enqueue_script( 'jetpack-facebook-embed' );
	111	+ return $embed;
	112	+ }
	113	+}
	114	+
	115	+/**
	116	+ * Shortcode handler.
	117	+ *
	118	+ * @param array $atts Shortcode attributes.
	119	+ */
	120	+function jetpack_facebook_shortcode_handler( $atts ) {
	121	+ global $wp_embed;
	122	+
	123	+ if ( empty( $atts['url'] ) ) {
	124	+ return;
	125	+ }
	126	+
	127	+ if ( ! preg_match( JETPACK_FACEBOOK_EMBED_REGEX, $atts['url'] )
	128	+ && ! preg_match( JETPACK_FACEBOOK_PHOTO_EMBED_REGEX, $atts['url'] )
	129	+ && ! preg_match( JETPACK_FACEBOOK_VIDEO_EMBED_REGEX, $atts['url'] )
	130	+ && ! preg_match( JETPACK_FACEBOOK_VIDEO_ALTERNATE_EMBED_REGEX, $atts['url'] ) ) {
	131	+ return;
	132	+ }
	133	+
	134	+ return $wp_embed->shortcode( $atts, $atts['url'] );
	135	+}
	136	+add_shortcode( 'facebook', 'jetpack_facebook_shortcode_handler' );
	137	+
	138	+/**
	139	+ * Embed Reversal for Facebook
	140	+ *
	141	+ * Hooked to pre_kses, converts an embed code from www.facebook.com to an oEmbeddable URL.
	142	+ *
	143	+ * @param string $content Post content.
	144	+ *
	145	+ * @return string The filtered or the original content.
	146	+ **/
	147	+function jetpack_facebook_embed_reversal( $content ) {
	148	+ if ( ! is_string( $content ) || false === stripos( $content, 'https://www.facebook.com/plugins/post.php' ) ) {
	149	+ return $content;
	150	+ }
	151	+
	152	+ /*
	153	+ * Sample embed code:
	154	+ * <iframe src="https://www.facebook.com/plugins/post.php?href=https%3A%2F%2Fwww.facebook.com%2Ftechcrunch%2Fposts%2Fpfbid0997g1PXQKfyFNHNTiCgaCFevt3PRFMaUBBB9eEFPR5NsXCv8EXxBw3p9bBYezWkHl&show_text=true&width=500" width="500" height="504" style="border:none;overflow:hidden" scrolling="no" frameborder="0" allowfullscreen="true" allow="autoplay; clipboard-write; encrypted-media; picture-in-picture; web-share"></iframe>
	155	+ */
	156	+
	157	+ $regexes = array();
	158	+ $regexes[] = '#<iframe[^>]+?src="((?:https?:)?//(?:www\.)?facebook\.com/plugins/post\.php\?[^"]+)"[^>]*?>\s*?</iframe>#i';
	159	+ $regexes[] = '#&lt;iframe[^&]+?src="((?:https?:)?//(?:www\.)?facebook\.com/plugins/post\.php\?[^"]+)"[^&]*?&gt;\s*?&lt;/iframe&gt;#i';
	160	+
	161	+ foreach ( $regexes as $regex ) {
	162	+ if ( ! preg_match_all( $regex, $content, $matches, PREG_SET_ORDER ) ) {
	163	+ continue;
	164	+ }
	165	+
	166	+ foreach ( $matches as $match ) {
	167	+ if ( ! preg_match( '#(https?:)?//(?:www\.)?facebook\.com/plugins/post.php([^/]*)#i', $match[1], $url_matches ) ) {
	168	+ continue;
	169	+ }
	170	+
	171	+ $src_url = $url_matches[0];
	172	+ $parsed_url = wp_parse_url( $src_url );
	173	+ if ( empty( $parsed_url['query'] ) ) {
	174	+ continue;
	175	+ }
	176	+
	177	+ $query_args = array();
	178	+ wp_parse_str( $parsed_url['query'], $query_args );
	179	+ if ( empty( $query_args['href'] ) ) {
	180	+ continue;
	181	+ }
	182	+
	183	+ // Since we support Facebook via oEmbed, we simply leave a link on a line by itself.
	184	+ $replace_regex = sprintf( '#\s*%s\s*#', preg_quote( $match[0], '#' ) );
	185	+ $url = esc_url( $query_args['href'] );
	186	+
	187	+ $content = preg_replace( $replace_regex, sprintf( "\n\n%s\n\n", $url ), $content );
	188	+ /** This action is documented in modules/shortcodes/youtube.php */
	189	+ do_action( 'jetpack_embed_to_shortcode', 'facebook', $url );
	190	+ }
	191	+ }
	192	+
	193	+ return $content;
	194	+}
	195	+
	196	+/**
	197	+ * Embed reversal: Convert an embed code from Facebook.com to an oEmbeddable URL.
	198	+ */
	199	+if ( jetpack_shortcodes_should_hook_pre_kses() ) {
	200	+ add_filter( 'pre_kses', 'jetpack_facebook_embed_reversal' );
	201	+}