<?php

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/**

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* Enhanced Open Graph for Jetpack.

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*

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* @package automattic/jetpack

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*/

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use Automattic\Jetpack\Post_Media\Images;

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if ( ! defined( 'ABSPATH' ) ) {

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exit( 0 );

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}

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if ( ! class_exists( 'Jetpack_Media_Summary' ) ) {

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require_once JETPACK__PLUGIN_DIR . '_inc/lib/class.media-summary.php';

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}

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/**

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* Better OG Image Tags for Image Post Formats

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*

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* @param array $tags Array of Open Graph tags.

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*/

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function enhanced_og_image( $tags ) {

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if ( ! is_singular() || post_password_required() ) {

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return $tags;

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}

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global $post;

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// Bail if we do not have info about the post.

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if ( ! $post instanceof WP_Post ) {

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return $tags;

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}

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// Always favor featured images.

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if ( enhanced_og_has_featured_image( $post->ID ) ) {

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return $tags;

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}

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$summary = Jetpack_Media_Summary::get(

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$post->ID,

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0,

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array(

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'include_excerpt' => false,

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'include_count' => false,

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)

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);

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if ( 'image' !== $summary['type'] ) {

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return $tags;

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}

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$tags['og:image'] = $summary['image'];

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$tags['og:image:secure_url'] = $summary['secure']['image'];

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return $tags;

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}

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add_filter( 'jetpack_open_graph_tags', 'enhanced_og_image' );

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/**

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* Better OG Image Tags for Gallery Post Formats

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*

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* @param array $tags Array of Open Graph tags.

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*/

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function enhanced_og_gallery( $tags ) {

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if ( ! is_singular() || post_password_required() ) {

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return $tags;

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}

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global $post;

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// Bail if we do not have info about the post.

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if ( ! $post instanceof WP_Post ) {

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return $tags;

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}

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// Always favor featured images.

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if ( enhanced_og_has_featured_image( $post->ID ) ) {

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return $tags;

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}

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$summary = Jetpack_Media_Summary::get(

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$post->ID,

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0,

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array(

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'include_excerpt' => false,

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'include_count' => false,

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)

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);

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if ( 'gallery' !== $summary['type'] ) {

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return $tags;

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}

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if ( ! isset( $summary['images'] ) || ! is_array( $summary['images'] ) || empty( $summary['images'] ) ) {

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return $tags;

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}

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$images = array();

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$secures = array();

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foreach ( $summary['images'] as $i => $image ) {

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$images[] = $image['url'];

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$secures[] = $summary['secure']['images'][ $i ]['url'];

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}

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$tags['og:image'] = $images;

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$tags['og:image:secure_url'] = $secures;

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return $tags;

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}

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add_filter( 'jetpack_open_graph_tags', 'enhanced_og_gallery' );

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/**

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* Allows VideoPress, YouTube, and Vimeo videos to play inline on Facebook

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*

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* @param array $tags Array of Open Graph tags.

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*/

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function enhanced_og_video( $tags ) {

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if ( ! is_singular() || post_password_required() ) {

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return $tags;

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}

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global $post;

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// Bail if we do not have info about the post.

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if ( ! $post instanceof WP_Post ) {

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return $tags;

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}

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// Always favor featured images.

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if ( enhanced_og_has_featured_image( $post->ID ) ) {

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return $tags;

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}

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$summary = Jetpack_Media_Summary::get(

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$post->ID,

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0,

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array(

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'include_excerpt' => false,

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'include_count' => false,

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)

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);

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if ( 'video' !== $summary['type'] ) {

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if ( $summary['count']['video'] > 0 && $summary['count']['image'] < 1 ) {

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$tags['og:image'] = $summary['image'];

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$tags['og:image:secure_url'] = $summary['secure']['image'];

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}

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return $tags;

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}

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$tags['og:image'] = $summary['image'];

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$tags['og:image:secure_url'] = $summary['secure']['image'];

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// This should be html by default for youtube/vimeo, since we're linking to HTML pages.

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$tags['og:video:type'] = isset( $summary['video_type'] ) ? $summary['video_type'] : 'text/html';

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$video_url = $summary['video'];

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$secure_video_url = $summary['secure']['video'];

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if ( preg_match( '/((youtube|vimeo)\.com|youtu.be)/', $video_url ) ) {

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if ( strstr( $video_url, 'youtube' ) ) {

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$id = jetpack_get_youtube_id( $video_url );

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$video_url = 'http://www.youtube.com/embed/' . $id;

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$secure_video_url = 'https://www.youtube.com/embed/' . $id;

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} elseif ( strstr( $video_url, 'vimeo' ) ) {

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preg_match( '|vimeo\.com/(\d+)/?$|i', $video_url, $match );

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if ( isset( $match[1] ) ) {

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$id = (int) $match[1];

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$video_url = 'http://vimeo.com/moogaloop.swf?clip_id=' . $id;

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$secure_video_url = 'https://vimeo.com/moogaloop.swf?clip_id=' . $id;

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}

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}

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}

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$tags['og:video'] = $video_url;

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$tags['og:video:secure_url'] = $secure_video_url;

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if ( empty( $post->post_title ) ) {

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/* translators: %s is the name of the site */

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$tags['og:title'] = sprintf( __( 'Video on %s', 'jetpack' ), get_option( 'blogname' ) );

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}

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return $tags;

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}

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add_filter( 'jetpack_open_graph_tags', 'enhanced_og_video' );

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/**

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* Check if a post has a suitable featured image.

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*

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* @param int $post_id The post ID to check.

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* @return bool True if the post has a suitable featured image, false otherwise.

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*/

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function enhanced_og_has_featured_image( $post_id ) {

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return ! empty( Images::from_thumbnail( $post_id ) );

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}

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