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<?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName
/**
* Provides media summary of a post.
*
* @package automattic/jetpack
*/
/**
* Class Jetpack_Media_Summary
*
* Priority: embed [video] > gallery > image > text
*/
class Jetpack_Media_Summary {
/**
* Media cache.
*
* @var array
*/
private static $cache = array();
/**
* Get media summary for a post.
*
* @param int $post_id Post ID.
* @param int $blog_id Blog ID, if applicable.
* @param array $args {
* Optional. An array of arguments.
* @type int $max_words Maximum number of words.
* @type int $max_chars Maximum number of characters.
* }
*
* @return array|mixed|void
*/
public static function get( $post_id, $blog_id = 0, $args = array() ) {
// @todo: Use type hinting in the line above when at PHP 7.0+.
$post_id = (int) $post_id;
$blog_id = (int) $blog_id;
$defaults = array(
'max_words' => 16,
'max_chars' => 256,
);
$args = wp_parse_args( $args, $defaults );
$switched = false;
if ( ! empty( $blog_id ) && get_current_blog_id() !== $blog_id && function_exists( 'switch_to_blog' ) ) {
switch_to_blog( $blog_id );
$switched = true;
} else {
$blog_id = get_current_blog_id();
}
$cache_key = "{$blog_id}_{$post_id}_{$args['max_words']}_{$args['max_chars']}";
if ( isset( self::$cache[ $cache_key ] ) ) {
if ( $switched ) {
restore_current_blog();
}
return self::$cache[ $cache_key ];
}
if ( ! class_exists( 'Jetpack_Media_Meta_Extractor' ) ) {
if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) {
jetpack_require_lib( 'class.wpcom-media-meta-extractor' );
} else {
jetpack_require_lib( 'class.media-extractor' );
}
}
$post = get_post( $post_id );
$permalink = get_permalink( $post_id );
$return = array(
'type' => 'standard',
'permalink' => $permalink,
'image' => '',
'excerpt' => '',
'word_count' => 0,
'secure' => array(
'image' => '',
),
'count' => array(
'image' => 0,
'video' => 0,
'word' => 0,
'link' => 0,
),
);
if ( $post instanceof WP_Post && empty( $post->post_password ) ) {
$return['excerpt'] = self::get_excerpt( $post->post_content, $post->post_excerpt, $args['max_words'], $args['max_chars'], $post );
$return['count']['word'] = self::get_word_count( $post->post_content );
$return['count']['word_remaining'] = self::get_word_remaining_count( $post->post_content, $return['excerpt'] );
$return['count']['link'] = self::get_link_count( $post->post_content );
}
$extract = Jetpack_Media_Meta_Extractor::extract( $blog_id, $post_id, Jetpack_Media_Meta_Extractor::ALL );
if ( empty( $extract['has'] ) ) {
if ( $switched ) {
restore_current_blog();
}
return $return;
}
// Prioritize [some] video embeds.
if ( ! empty( $extract['has']['shortcode'] ) ) {
foreach ( $extract['shortcode'] as $type => $data ) {
switch ( $type ) {
case 'videopress':
case 'wpvideo':
if ( 0 === $return['count']['video'] ) {
// If there is no id on the video, then let's just skip this.
if ( ! isset( $data['id'][0] ) ) {
break;
}
$guid = $data['id'][0];
$video_info = videopress_get_video_details( $guid );
// Only add the video tags if the guid returns a valid videopress object.
if ( $video_info instanceof stdClass ) {
// Continue early if we can't find a Video slug.
if ( empty( $video_info->files->std->mp4 ) ) {
break;
}
$url = sprintf(
'https://videos.files.wordpress.com/%1$s/%2$s',
$guid,
$video_info->files->std->mp4
);
$thumbnail = $video_info->poster;
if ( ! empty( $thumbnail ) ) {
$return['image'] = $thumbnail;
$return['secure']['image'] = $thumbnail;
}
$return['type'] = 'video';
$return['video'] = esc_url_raw( $url );
$return['video_type'] = 'video/mp4';
$return['secure']['video'] = $return['video'];
}
}
$return['count']['video']++;
break;
case 'youtube':
if ( 0 === $return['count']['video'] ) {
$return['type'] = 'video';
$return['video'] = esc_url_raw( 'http://www.youtube.com/watch?feature=player_embedded&v=' . $extract['shortcode']['youtube']['id'][0] );
$return['image'] = self::get_video_poster( 'youtube', $extract['shortcode']['youtube']['id'][0] );
$return['secure']['video'] = self::https( $return['video'] );
$return['secure']['image'] = self::https( $return['image'] );
}
$return['count']['video']++;
break;
case 'vimeo':
if ( 0 === $return['count']['video'] ) {
$return['type'] = 'video';
$return['video'] = esc_url_raw( 'http://vimeo.com/' . $extract['shortcode']['vimeo']['id'][0] );
$return['secure']['video'] = self::https( $return['video'] );
$poster_image = get_post_meta( $post_id, 'vimeo_poster_image', true );
if ( ! empty( $poster_image ) ) {
$return['image'] = $poster_image;
$poster_url_parts = wp_parse_url( $poster_image );
$return['secure']['image'] = 'https://secure-a.vimeocdn.com' . $poster_url_parts['path'];
}
}
$return['count']['video']++;
break;
}
}
}
if ( ! empty( $extract['has']['embed'] ) ) {
foreach ( $extract['embed']['url'] as $embed ) {
if ( preg_match( '/((youtube|vimeo|dailymotion)\.com|youtu.be)/', $embed ) ) {
if ( 0 === $return['count']['video'] ) {
$return['type'] = 'video';
$return['video'] = 'http://' . $embed;
$return['secure']['video'] = self::https( $return['video'] );
if ( false !== strpos( $embed, 'youtube' ) ) {
$return['image'] = self::get_video_poster( 'youtube', jetpack_get_youtube_id( $return['video'] ) );
$return['secure']['image'] = self::https( $return['image'] );
} elseif ( false !== strpos( $embed, 'youtu.be' ) ) {
$youtube_id = jetpack_get_youtube_id( $return['video'] );
$return['video'] = 'http://youtube.com/watch?v=' . $youtube_id . '&feature=youtu.be';
$return['secure']['video'] = self::https( $return['video'] );
$return['image'] = self::get_video_poster( 'youtube', jetpack_get_youtube_id( $return['video'] ) );
$return['secure']['image'] = self::https( $return['image'] );
} elseif ( false !== strpos( $embed, 'vimeo' ) ) {
$poster_image = get_post_meta( $post_id, 'vimeo_poster_image', true );
if ( ! empty( $poster_image ) ) {
$return['image'] = $poster_image;
$poster_url_parts = wp_parse_url( $poster_image );
$return['secure']['image'] = 'https://secure-a.vimeocdn.com' . $poster_url_parts['path'];
}
} elseif ( false !== strpos( $embed, 'dailymotion' ) ) {
$return['image'] = str_replace( 'dailymotion.com/video/', 'dailymotion.com/thumbnail/video/', $embed );
$return['image'] = wp_parse_url( $return['image'], PHP_URL_SCHEME ) === null ? 'http://' . $return['image'] : $return['image'];
$return['secure']['image'] = self::https( $return['image'] );
}
}
$return['count']['video']++;
}
}
}
// Do we really want to make the video the primary focus of the post?
if ( 'video' === $return['type'] ) {
$content = wpautop( wp_strip_all_tags( $post->post_content ) );
$paragraphs = explode( '</p>', $content );
$number_of_paragraphs = 0;
foreach ( $paragraphs as $i => $paragraph ) {
// Don't include blank lines as a paragraph.
if ( '' === trim( $paragraph ) ) {
unset( $paragraphs[ $i ] );
continue;
}
$number_of_paragraphs++;
}
$number_of_paragraphs = $number_of_paragraphs - $return['count']['video']; // subtract amount for videos.
// More than 2 paragraph? The video is not the primary focus so we can do some more analysis.
if ( $number_of_paragraphs > 2 ) {
$return['type'] = 'standard';
}
}
// If we don't have any prioritized embed...
if ( 'standard' === $return['type'] ) {
if ( ( ! empty( $extract['has']['gallery'] ) || ! empty( $extract['shortcode']['gallery']['count'] ) ) && ! empty( $extract['image'] ) ) {
// ... Then we prioritize galleries first (multiple images returned)
$return['type'] = 'gallery';
$return['images'] = $extract['image'];
foreach ( $return['images'] as $image ) {
$return['secure']['images'][] = array( 'url' => self::ssl_img( $image['url'] ) );
$return['count']['image']++;
}
} elseif ( ! empty( $extract['has']['image'] ) ) {
// ... Or we try and select a single image that would make sense.
$content = wpautop( wp_strip_all_tags( $post->post_content ) );
$paragraphs = explode( '</p>', $content );
$number_of_paragraphs = 0;
foreach ( $paragraphs as $i => $paragraph ) {
// Don't include 'actual' captions as a paragraph.
if ( false !== strpos( $paragraph, '[caption' ) ) {
unset( $paragraphs[ $i ] );
continue;
}
// Don't include blank lines as a paragraph.
if ( '' === trim( $paragraph ) ) {
unset( $paragraphs[ $i ] );
continue;
}
$number_of_paragraphs++;
}
$return['image'] = $extract['image'][0]['url'];
$return['secure']['image'] = self::ssl_img( $return['image'] );
$return['count']['image']++;
if ( $number_of_paragraphs <= 2 && 1 === count( $extract['image'] ) ) {
// If we have lots of text or images, let's not treat it as an image post, but return its first image.
$return['type'] = 'image';
}
}
}
if ( $switched ) {
restore_current_blog();
}
/**
* Allow a theme or plugin to inspect and ultimately change the media summary.
*
* @since 4.4.0
*
* @param array $data The calculated media summary data.
* @param int $post_id The id of the post this data applies to.
*/
$return = apply_filters( 'jetpack_media_summary_output', $return, $post_id );
self::$cache[ $cache_key ] = $return;
return $return;
}
/**
* Converts http to https://
*
* @param string $str URL.
*
* @return string URL.
*/
public static function https( $str ) {
return str_replace( 'http://', 'https://', $str );
}
/**
* Returns a Photonized version of the URL.
*
* @param string $url URL.
*
* @return string URL.
*/
public static function ssl_img( $url ) {
if ( false !== strpos( $url, 'files.wordpress.com' ) ) {
return self::https( $url );
} else {
return self::https( jetpack_photon_url( $url ) );
}
}
/**
* Get the video poster.
*
* @param string $type Video service.
* @param string $id Video ID for the service.
*
* @return string URL of image thumbnail for the video.
*/
public static function get_video_poster( $type, $id ) {
if ( 'videopress' === $type ) {
if ( function_exists( 'video_get_highest_resolution_image_url' ) ) {
return video_get_highest_resolution_image_url( $id );
} elseif ( class_exists( 'VideoPress_Video' ) ) {
$video = new VideoPress_Video( $id );
return $video->poster_frame_uri;
}
} elseif ( 'youtube' === $type ) {
return 'http://img.youtube.com/vi/' . $id . '/0.jpg';
}
}
/**
* Clean text of shortcodes and tags.
*
* @param string $text Dirty text.
*
* @return string Clean text.
*/
public static function clean_text( $text ) {
return trim(
preg_replace(
'/[\s]+/',
' ',
preg_replace(
'@https?://[\S]+@',
'',
strip_shortcodes(
wp_strip_all_tags(
$text
)
)
)
)
);
}
/**
* Retrieve an excerpt for the post summary.
*
* This function works around a suspected problem with Core. If resolved, this function should be simplified.
*
* @link https://github.com/Automattic/jetpack/pull/8510
* @link https://core.trac.wordpress.org/ticket/42814
*
* @param string $post_content The post's content.
* @param string $post_excerpt The post's excerpt. Empty if none was explicitly set.
* @param int $max_words Maximum number of words for the excerpt. Used on wp.com. Default 16.
* @param int $max_chars Maximum characters in the excerpt. Used on wp.com. Default 256.
* @param WP_Post $requested_post The post object.
* @return string Post excerpt.
**/
public static function get_excerpt( $post_content, $post_excerpt, $max_words = 16, $max_chars = 256, $requested_post = null ) {
global $post;
$original_post = $post; // Saving the global for later use.
if ( empty( $post_excerpt ) && function_exists( 'wpcom_enhanced_excerpt_extract_excerpt' ) ) {
return self::clean_text(
wpcom_enhanced_excerpt_extract_excerpt(
array(
'text' => $post_content,
'excerpt_only' => true,
'show_read_more' => false,
'max_words' => $max_words,
'max_chars' => $max_chars,
'read_more_threshold' => 25,
)
)
);
} elseif ( $requested_post instanceof WP_Post ) {
// @todo Refactor to not need to override the global.
// phpcs:ignore: WordPress.WP.GlobalVariablesOverride.Prohibited
$post = $requested_post; // setup_postdata does not set the global.
setup_postdata( $post );
/** This filter is documented in core/src/wp-includes/post-template.php */
$post_excerpt = apply_filters( 'get_the_excerpt', $post_excerpt, $post );
// phpcs:ignore: WordPress.WP.GlobalVariablesOverride.Prohibited
$post = $original_post; // wp_reset_postdata uses the $post global.
wp_reset_postdata();
return self::clean_text( $post_excerpt );
}
return '';
}
/**
* Split a string into an array of words.
*
* @param string $text Post content or excerpt.
*
* @return array Array of words.
*/
public static function split_content_in_words( $text ) {
$words = preg_split( '/[\s!?;,.]+/', $text, -1, PREG_SPLIT_NO_EMPTY );
// Return an empty array if the split above fails.
return $words ? $words : array();
}
/**
* Get the word count.
*
* @param string $post_content Post content.
*
* @return int Word count.
*/
public static function get_word_count( $post_content ) {
return (int) count( self::split_content_in_words( self::clean_text( $post_content ) ) );
}
/**
* Get remainder word count (after the excerpt).
*
* @param string $post_content Post content.
* @param string $excerpt_content Excerpt content.
*
* @return int Number of words after the excerpt.
*/
public static function get_word_remaining_count( $post_content, $excerpt_content ) {
$content_word_count = count( self::split_content_in_words( self::clean_text( $post_content ) ) );
$excerpt_word_count = count( self::split_content_in_words( self::clean_text( $excerpt_content ) ) );
return (int) $content_word_count - $excerpt_word_count;
}
/**
* Counts the number of links in a post.
*
* @param string $post_content Post content.
*
* @return false|int Number of links.
*/
public static function get_link_count( $post_content ) {
return preg_match_all( '/\<a[\> ]/', $post_content, $matches );
}
}