/wp-content/plugins/jetpack/class.media-summary.php

<?php

/**

 * Class Jetpack_Media_Summary

 *

 * embed [video] > gallery > image > text

 */

class Jetpack_Media_Summary {



	static function get( $post_id, $blog_id = 0, $args = array() ) {

		$defaults = array(

			'max_words' => 16,

			'max_chars' => 256,

		);

		$args = wp_parse_args( $args, $defaults );



		$switched = false;

		if ( !empty( $blog_id ) && $blog_id != get_current_blog_id() && function_exists( 'switch_to_blog' ) ) {

			switch_to_blog( $blog_id );

			$switched = true;

		} else {

			$blog_id = get_current_blog_id();

		}



		$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 ( empty( $post->post_password ) ) {

			$return['excerpt']       = self::get_excerpt( $post->post_content, $post->post_excerpt, $args['max_words'], $args['max_chars'] );

			$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'] ) )

			return $return;



		// Prioritize [some] video embeds

		if ( !empty( $extract['has']['shortcode'] ) ) {

			foreach ( $extract['shortcode'] as $type => $data ) {

				switch ( $type ) {

					case 'wpvideo':

						if ( 0 == $return['count']['video'] ) {

							$return['type'] = 'video';

							$return['video'] = esc_url_raw( 'http://s0.videopress.com/player.swf?guid=' . $extract['shortcode']['wpvideo']['id'][0] . '&isDynamicSeeking=true' );

							$return['image'] = self::get_video_poster( 'videopress', $extract['shortcode']['wpvideo']['id'][0] );

							$return['secure']['video'] = preg_replace( '@http://[^\.]+.videopress.com/@', 'https://v0.wordpress.com/', $return['video'] );

							$return['secure']['image'] = str_replace( 'http://videos.videopress.com', 'https://videos.files.wordpress.com', $return['image'] );

						}

						$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 = 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)\.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'] );

						} else if ( 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'] );

						} else if ( 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 = parse_url( $poster_image );

								$return['secure']['image'] = 'https://secure-a.vimeocdn.com' . $poster_url_parts['path'];

							}

						}



					}

					$return['count']['video']++;

				}

			}

		}



		// Do we really want to make the video the primary focus of the post?

		if ( 'video' == $return['type'] ) {

			$content = wpautop( strip_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']++;

				}

			} else if ( ! empty( $extract['has']['image'] ) ) {

				// ... Or we try and select a single image that would make sense

				$content = wpautop( strip_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();

		}



		return $return;

	}



	static function https( $str ) {

		return str_replace( 'http://', 'https://', $str );

	}



	static function ssl_img( $url ) {

		if ( false !== strpos( $url, 'files.wordpress.com' ) ) {

			return self::https( $url );

		} else {

			return self::https( jetpack_photon_url( $url ) );

		}

	}



	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 );

			} else if ( class_exists( 'VideoPress_Video' ) ) {

				$video = new VideoPress_Video( $id );

				return $video->poster_frame_uri;

			}

		} else if ( 'youtube' == $type ) {

			return  'http://img.youtube.com/vi/'.$id.'/0.jpg';

		}

	}



	static function clean_text( $text ) {

		return trim(

			preg_replace(

				'/[\s]+/',

				' ',

				preg_replace(

					'@https?://[\S]+@',

					'',

					strip_shortcodes(

						strip_tags(

							$text

						)

					)

				)

			)

		);

	}



	static function get_excerpt( $post_content, $post_excerpt, $max_words = 16, $max_chars = 256 ) {

		if ( 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,

			) ) );

		} else {

			$post_excerpt = apply_filters( 'get_the_excerpt', $post_excerpt );

			return self::clean_text( $post_excerpt );

		}

	}



	static function get_word_count( $post_content ) {

		return str_word_count( self::clean_text( $post_content ) );

	}



	static function get_word_remaining_count( $post_content, $excerpt_content ) {

		return str_word_count( self::clean_text( $post_content ) ) - str_word_count( self::clean_text( $excerpt_content ) );

	}



	static function get_link_count( $post_content ) {

		return preg_match_all( '/\<a[\> ]/', $post_content, $matches );

	}

}