update plugins

1 files changed, 440 insertions, 0 deletions

diff --git a/plugins/jetpack/class.jetpack-post-images.php b/plugins/jetpack/class.jetpack-post-images.php
new file mode 100644
index 00000000..afdcacfa
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+++ b/plugins/jetpack/class.jetpack-post-images.php
@@ -0,0 +1,440 @@
+<?php
+
+/**
+ * Useful for finding an image to display alongside/in representation of a specific post.
+ *
+ * Includes a few different methods, all of which return a similar-format array containing
+ * details of any images found. Everything can (should) be called statically, it's just a
+ * function-bucket. You can also call Jetpack_PostImages::get_image() to cycle through all of the methods until
+ * one of them finds something useful.
+ *
+ * This file is included verbatim in Jetpack
+ */
+class Jetpack_PostImages {
+	/**
+	 * If a slideshow is embedded within a post, then parse out the images involved and return them
+	 */
+	static function from_slideshow( $post_id, $width = 200, $height = 200 ) {
+		$post = get_post( $post_id );
+
+		if ( false === strpos( $post->post_content, '[slideshow' ) )
+			return false; // no slideshow - bail
+
+		$permalink = get_permalink( $post->ID );
+
+		$images = array();
+
+		// Mechanic: Somebody set us up the bomb
+		$old_post = $GLOBALS['post'];
+		$GLOBALS['post'] = $post;
+		$old_shortcodes = $GLOBALS['shortcode_tags'];
+		$GLOBALS['shortcode_tags'] = array( 'slideshow' => $old_shortcodes['slideshow'] );
+
+		// Find all the slideshows
+		preg_match_all( '/' . get_shortcode_regex() . '/sx', $post->post_content, $slideshow_matches, PREG_SET_ORDER );
+
+		ob_start(); // The slideshow shortcode handler calls wp_print_scripts and wp_print_styles... not too happy about that
+
+		foreach ( $slideshow_matches as $slideshow_match ) {
+			$slideshow = do_shortcode_tag( $slideshow_match );
+			if ( false === $pos = stripos( $slideshow, 'slideShow.images' ) ) // must be something wrong - or we changed the output format in which case none of the following will work
+				continue;
+			$start = strpos( $slideshow, '[', $pos );
+			$end = strpos( $slideshow, ']', $start );
+			$post_images = json_decode( str_replace( "'", '"', substr( $slideshow, $start, $end - $start + 1 ) ) ); // parse via JSON
+			foreach ( $post_images as $post_image ) {
+				if ( !$post_image_id = absint( $post_image->id ) )
+					continue;
+
+				$meta = wp_get_attachment_metadata( $post_image_id );
+
+				// Must be larger than 200x200 (or user-specified)
+				if ( !isset( $meta['width'] ) || $meta['width'] < $width )
+					continue;
+				if ( !isset( $meta['height'] ) || $meta['height'] < $height )
+					continue;
+
+				$url = wp_get_attachment_url( $post_image_id );
+
+				$images[] = array(
+					'type'       => 'image',
+					'from'       => 'slideshow',
+					'src'        => $url,
+					'src_width'  => $meta['width'],
+					'src_height' => $meta['height'],
+					'href'       => $permalink,
+				);
+			}
+		}
+		ob_end_clean();
+
+		// Operator: Main screen turn on
+		$GLOBALS['shortcode_tags'] = $old_shortcodes;
+		$GLOBALS['post'] = $old_post;
+
+		return $images;
+	}
+
+	/**
+	 * If a gallery is detected, then get all the images from it.
+	 */
+	static function from_gallery( $post_id ) {
+		$post = get_post( $post_id );
+
+		if ( false === strpos( $post->post_content, '[gallery' ) )
+			return false; // no gallery - bail
+
+		$permalink = get_permalink( $post->ID );
+
+		$images = array();
+
+		// CATS: All your base are belong to us
+		$old_post = $GLOBALS['post'];
+		$GLOBALS['post'] = $post;
+		$old_shortcodes = $GLOBALS['shortcode_tags'];
+		$GLOBALS['shortcode_tags'] = array( 'gallery' => $old_shortcodes['gallery'] );
+
+		// Find all the galleries
+		preg_match_all( '/' . get_shortcode_regex() . '/s', $post->post_content, $gallery_matches, PREG_SET_ORDER );
+
+		foreach ( $gallery_matches as $gallery_match ) {
+			$gallery = do_shortcode_tag( $gallery_match );
+
+			// Um... no images in the gallery - bail
+			if ( false === $pos = stripos( $gallery, '<img' ) )
+				continue;
+
+			preg_match_all( '/<img\s+[^>]*src=([\'"])([^\'"]*)\\1/', $gallery, $image_match, PREG_PATTERN_ORDER | PREG_OFFSET_CAPTURE );
+
+			$a_pos = 0;
+			foreach ( $image_match[2] as $src ) {
+				list( $raw_src ) = explode( '?', $src[0] ); // pull off any Query string (?w=250)
+				$raw_src = wp_specialchars_decode( $raw_src ); // rawify it
+				$raw_src = esc_url_raw( $raw_src ); // clean it
+
+				$a_pos = strrpos( substr( $gallery, 0, $src[1] ), '<a', $a_pos ); // is there surrounding <a>?
+
+				if ( false !== $a_pos && preg_match( '/<a\s+[^>]*href=([\'"])([^\'"]*)\\1/', $gallery, $href_match, 0, $a_pos ) ) {
+					$href = wp_specialchars_decode( $href_match[2] );
+					$href = esc_url_raw( $href );
+				} else {
+					// CATS: You have no chance to survive make your time
+					$href = $raw_src;
+				}
+
+				$a_pos = $src[1];
+
+				$images[] = array(
+					'type'  => 'image',
+					'from'  => 'gallery',
+					'src'   => $raw_src,
+					'href'  => $permalink, // $href,
+				);
+			}
+		}
+
+		// Captain: For great justice
+		$GLOBALS['shortcode_tags'] = $old_shortcodes;
+		$GLOBALS['post'] = $old_post;
+
+		return $images;
+	}
+
+	/**
+	 * Get attachment images for a specified post and return them. Also make sure
+	 * their dimensions are at or above a required minimum.
+	 */
+	static function from_attachment( $post_id, $width = 200, $height = 200 ) {
+
+		$post_images = get_posts( array(
+			'post_parent' => $post_id,   // Must be children of post
+			'numberposts' => 5,          // No more than 5
+			'post_type' => 'attachment', // Must be attachments
+			'post_mime_type' => 'image', // Must be images
+		) );
+
+		if ( !$post_images )
+			return false;
+
+		$permalink = get_permalink( $post_id );
+
+		$images = array();
+
+		foreach ( $post_images as $post_image ) {
+			$meta = wp_get_attachment_metadata( $post_image->ID );
+			// Must be larger than 200x200
+			if ( !isset( $meta['width'] ) || $meta['width'] < $width )
+				continue;
+			if ( !isset( $meta['height'] ) || $meta['height'] < $height )
+				continue;
+
+			$url = wp_get_attachment_url( $post_image->ID );
+
+			$images[] = array(
+				'type'       => 'image',
+				'from'       => 'attachment',
+				'src'        => $url,
+				'src_width'  => $meta['width'],
+				'src_height' => $meta['height'],
+				'href'       => $permalink,
+			);
+		}
+
+		/*
+		* We only want to pass back attached images that were actually inserted.
+		* We can load up all the images found in the HTML source and then
+		* compare URLs to see if an image is attached AND inserted.
+		*/
+		$html_images = array();
+		$html_images = self::from_html( $post_id );
+		$inserted_images = array();
+
+		foreach( $html_images as $html_image ) {
+			$src = parse_url( $html_image['src'] );
+			$inserted_images[] = $src['scheme'] . '://' . $src['host'] . $src['path']; // strip off any query strings
+		}
+		foreach( $images as $i => $image ) {
+			if ( !in_array( $image['src'], $inserted_images ) )
+				unset( $images[$i] );
+		}
+
+		return $images;
+	}
+
+	/**
+	 * Check if a Featured Image is set for this post, and return it in a similar
+	 * format to the other images?_from_*() methods.
+	 * @param  int $post_id The post ID to check
+	 * @return Array containing details of the Featured Image, or empty array if none.
+	 */
+	static function from_thumbnail( $post_id, $width = 200, $height = 200 ) {
+		$images = array();
+
+		if ( !function_exists( 'get_post_thumbnail_id' ) ) {
+			return $images;
+		}
+
+		$thumb = get_post_thumbnail_id( $post_id );
+
+		if ( $thumb ) {
+			$meta = wp_get_attachment_metadata( $thumb );
+
+			// Must be larger than requested minimums
+			if ( !isset( $meta['width'] ) || $meta['width'] < $width )
+				return $images;
+			if ( !isset( $meta['height'] ) || $meta['height'] < $height )
+				return $images;
+
+			$url = wp_get_attachment_url( $thumb );
+			if ( stristr( $url, '?' ) )
+				$url = substr( $url, 0, strpos( $url, '?' ) );
+
+			$images = array( array( // Other methods below all return an array of arrays
+				'type'       => 'image',
+				'from'       => 'thumbnail',
+				'src'        => $url,
+				'src_width'  => $meta['width'],
+				'src_height' => $meta['height'],
+				'href'       => get_permalink( $thumb ),
+			) );
+		}
+		return $images;
+	}
+
+	/**
+	 * Very raw -- just parse the HTML and pull out any/all img tags and return their src
+	 * @param  mixed $html_or_id The HTML string to parse for images, or a post id
+	 * @return Array containing images
+	 */
+	static function from_html( $html_or_id ) {
+		$images = array();
+
+		if ( is_numeric( $html_or_id ) ) {
+			$post = get_post( $html_or_id );
+
+			if ( !$post )
+				return $images;
+			$html = $post->post_content; // DO NOT apply the_content filters here, it will cause loops
+		}
+
+		if ( !$html )
+			return $images;
+
+		preg_match_all( '!<img.*src="([^"]+)".*/?>!iUs', $html, $matches );
+		if ( !empty( $matches[1] ) ) {
+			foreach ( $matches[1] as $match ) {
+				if ( stristr( $match, '/smilies/' ) )
+					continue;
+
+				$images[] = array(
+					'type'  => 'image',
+					'from'  => 'html',
+					'src'   => html_entity_decode( $match ),
+					'href'  => '', // No link to apply to these. Might potentially parse for that as well, but not for now
+				);
+			}
+		}
+
+		return $images;
+	}
+
+	/**
+	 * @param    int $post_id The post ID to check
+	 * @param    int $size
+	 * @return Array containing details of the image, or empty array if none.
+	 */
+	static function from_blavatar( $post_id, $size = 96 ) {
+		if ( !function_exists( 'blavatar_domain' ) || !function_exists( 'blavatar_exists' ) || !function_exists( 'blavatar_url' ) ) {
+			return array();
+		}
+
+		$permalink = get_permalink( $post_id );
+		$domain = blavatar_domain( $permalink );
+
+		if ( !blavatar_exists( $domain ) ) {
+			return array();
+		}
+
+		$url = blavatar_url( $domain, 'img', $size );
+
+		return array( array(
+			'type'       => 'image',
+			'from'       => 'blavatar',
+			'src'        => $url,
+			'src_width'  => $size,
+			'src_height' => $size,
+			'href'       => $permalink,
+		) );
+	}
+
+	/**
+	 * @param    int $post_id The post ID to check
+	 * @param    int $size
+	 * @param string $default The default image to use.
+	 * @return Array containing details of the image, or empty array if none.
+	 */
+	static function from_gravatar( $post_id, $size = 96, $default = false ) {
+		$post = get_post( $post_id );
+		$permalink = get_permalink( $post_id );
+
+		if ( function_exists( 'get_avatar_url' ) ) {
+			$url = get_avatar_url( $post->post_author, $size, $default, true );
+			if ( $url && is_array( $url ) ) {
+				$url = $url[0];
+			}
+		} else {
+			$has_filter = has_filter( 'pre_option_show_avatars', '__return_true' );
+			if ( !$has_filter ) {
+				add_filter( 'pre_option_show_avatars', '__return_true' );
+			}
+			$avatar = get_avatar( $post->post_author, $size, $default );
+			if ( !$has_filter ) {
+				remove_filter( 'pre_option_show_avatars', '__return_true' );
+			}
+
+			if ( !$avatar ) {
+				return array();
+			}
+
+			if ( !preg_match( '/src=["\']([^"\']+)["\']/', $avatar, $matches ) ) {
+				return array();
+			}
+
+			$url = wp_specialchars_decode( $matches[1], ENT_QUOTES );
+		}
+
+		return array( array(
+			'type'       => 'image',
+			'from'       => 'gravatar',
+			'src'        => $url,
+			'src_width'  => $size,
+			'src_height' => $size,
+			'href'       => $permalink,
+		) );
+	}
+
+	/**
+	 * Run through the different methods that we have available to try to find a single good
+	 * display image for this post.
+	 * @param  int $post_id
+	 * @param array $args Other arguments (currently width and height required for images where possible to determine)
+	 * @return Array containing details of the best image to be used
+	 */
+	static function get_image( $post_id, $args = array() ) {
+		$image = '';
+		do_action( 'jetpack_postimages_pre_get_image', $post_id );
+		$media = self::get_images( $post_id, $args );
+
+
+		if ( is_array( $media ) ) {
+			foreach ( $media as $item ) {
+				if ( 'image' == $item['type'] ) {
+					$image = $item;
+					break;
+				}
+			}
+		}
+
+		do_action( 'jetpack_postimages_post_get_image', $post_id );
+
+		return $image;
+	}
+
+	/**
+	 * Get an array containing a collection of possible images for this post, stopping once we hit a method
+	 * that returns something useful.
+	 * @param  int $post_id
+	 * @param  array  $args Optional args, see defaults list for details
+	 * @return Array containing images that would be good for representing this post
+	 */
+	static function get_images( $post_id, $args = array() ) {
+		// Figure out which image to attach to this post.
+		$media = false;
+
+		$media = apply_filters( 'jetpack_images_pre_get_images', $media, $post_id, $args );
+		if ( $media )
+			return $media;
+
+		$defaults = array(
+			'width'               => 200, // Required minimum width (if possible to determine)
+			'height'              => 200, // Required minimum height (if possible to determine)
+
+			'fallback_to_avatars' => false, // Optionally include Blavatar and Gravatar (in that order) in the image stack
+			'avatar_size'         => 96, // Used for both Grav and Blav
+			'gravatar_default'    => false, // Default image to use if we end up with no Gravatar
+
+			'from_thumbnail'      => true, // Use these flags to specifcy which methods to use to find an image
+			'from_slideshow'      => true,
+			'from_gallery'        => true,
+			'from_attachment'     => true,
+			'from_html'           => true,
+
+			'html_content'        => '' // HTML string to pass to from_html()
+		);
+		$args = wp_parse_args( $args, $defaults );
+
+		$media = false;
+		if ( $args['from_thumbnail'] )
+			$media = self::from_thumbnail( $post_id, $args['width'], $args['height'] );
+		if ( !$media && $args['from_slideshow'] )
+			$media = self::from_slideshow( $post_id, $args['width'], $args['height'] );
+		if ( !$media && $args['from_gallery'] )
+			$media = self::from_gallery( $post_id );
+		if ( !$media && $args['from_attachment'] )
+			$media = self::from_attachment( $post_id, $args['width'], $args['height'] );
+		if ( !$media && $args['from_html'] ) {
+			if ( empty( $args['html_content'] ) )
+				$media = self::from_html( $post_id ); // Use the post_id, which will load the content
+			else
+				$media = self::from_html( $args['html_content'] ); // If html_content is provided, use that
+		}
+
+		if ( !$media && $args['fallback_to_avatars'] ) {
+			$media = self::from_blavatar( $post_id, $args['avatar_size'] );
+			if ( !$media )
+				$media = self::from_gravatar( $post_id, $args['avatar_size'], $args['gravatar_default'] );
+		}
+
+		return apply_filters( 'jetpack_images_get_images', $media, $post_id, $args );
+	}
+}