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<?php |
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/** |
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* Friends microformats Parser Wrapper |
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* |
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* With this parser, we can import RSS and Atom Feeds for a friend. |
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* |
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* @package Friends |
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*/ |
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|
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namespace Friends; |
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|
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/** |
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* This is the class for the feed part of the Friends Plugin. |
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* |
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* @since 1.0 |
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* |
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* @package Friends |
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* @author Alex Kirk |
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*/ |
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class Feed_Parser_Microformats extends Feed_Parser_V2 { |
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const NAME = 'Microformats'; |
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const URL = 'https://www.microformats.org/'; |
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const SLUG = 'microformats'; |
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|
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/** |
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* Determines if this is a supported feed and to what degree we feel it's supported. |
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* |
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* @param string $url The url. |
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* @param string $mime_type The mime type. |
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* @param string $title The title. |
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* @param string|null $content The content, it can't be assumed that it's always available. |
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* |
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* @return int Return 0 if unsupported, a positive value representing the confidence for the feed, use 10 if you're reasonably confident. |
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*/ |
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public function feed_support_confidence( $url, $mime_type, $title, $content = null ) { |
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if ( ! $content ) { |
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return 0; |
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} |
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$feeds = self::discover_available_feeds( $content, $url ); |
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if ( isset( $feeds[ $url ] ) ) { |
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return 10; |
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} |
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|
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return 0; |
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} |
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|
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/** |
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* Format the feed title and autoselect the posts feed. |
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* |
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* @param array $feed_details The feed details. |
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* |
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* @return array The (potentially) modified feed details. |
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*/ |
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public function update_feed_details( $feed_details ) { |
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$feed_details['title'] = trim( str_replace( array( '» Feed', '» Feed' ), '', $feed_details['title'] ) ); |
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|
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foreach ( get_post_format_strings() as $format => $title ) { |
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if ( preg_match( '/\b' . preg_quote( $format, '/' ) . '\b/i', $feed_details['url'] ) ) { |
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$feed_details['post-format'] = $format; |
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break; |
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} |
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} |
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|
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return $feed_details; |
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} |
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|
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/** |
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* Discover the feeds available at the URL specified. |
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* |
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* @param string $content The content for the URL is already provided here. |
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* @param string $url The url to search. |
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* |
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* @return array A list of supported feeds at the URL. |
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*/ |
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public function discover_available_feeds( $content, $url ) { |
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$discovered_feeds = array(); |
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$mf = Mf2\parse( $content, $url ); |
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if ( isset( $mf['rel-urls'] ) ) { |
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foreach ( $mf['rel-urls'] as $feed_url => $link ) { |
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foreach ( array( 'me', 'alternate' ) as $rel ) { |
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if ( in_array( $rel, $link['rels'] ) ) { |
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$discovered_feeds[ $feed_url ] = array( |
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'rel' => $rel, |
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); |
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} |
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} |
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|
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if ( ! isset( $discovered_feeds[ $feed_url ] ) ) { |
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continue; |
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} |
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|
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if ( isset( $link['type'] ) ) { |
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$discovered_feeds[ $feed_url ]['type'] = $link['type']; |
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} |
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|
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if ( isset( $link['title'] ) ) { |
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$discovered_feeds[ $feed_url ]['title'] = $link['title']; |
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} elseif ( isset( $link['text'] ) ) { |
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$discovered_feeds[ $feed_url ]['title'] = $link['text']; |
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} |
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} |
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} |
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|
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if ( isset( $mf['items'] ) ) { |
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$feed_items = $this->parse_hfeed( $mf ); |
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if ( count( $feed_items ) > 0 ) { |
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$discovered_feeds[ $url ] = array( |
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'type' => 'text/html', |
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'rel' => 'self', |
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'post-format' => 'autodetect', |
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'parser' => 'microformats', |
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); |
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} |
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} |
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|
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return $discovered_feeds; |
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} |
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|
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/** |
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* Parse an h-card. |
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* |
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* @param array $data The data. |
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* @param bool $category It is a category. |
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* |
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* @return string The discovered value. |
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*/ |
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private function parse_hcard( $data, $category = false ) { |
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$name = ''; |
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$link = ''; |
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// Check if h-card is set and pass that information on in the link. |
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if ( isset( $data['type'] ) && in_array( 'h-card', $data['type'] ) ) { |
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if ( isset( $data['properties']['name'][0] ) ) { |
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$name = $data['properties']['name'][0]; |
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} |
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if ( isset( $data['properties']['url'][0] ) ) { |
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$link = $data['properties']['url'][0]; |
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if ( '' === $name ) { |
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$name = $link; |
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} else { |
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// can't have commas in categories. |
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$name = str_replace( ',', '', $name ); |
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} |
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$person_tag = $category ? '<span class="person-tag"></span>' : ''; |
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return '<a class="h-card" href="' . $link . '">' . $person_tag . $name . '</a>'; |
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} |
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} |
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return isset( $data['value'] ) ? $data['value'] : ''; |
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} |
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|
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/** |
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* Parse an h-feed. |
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* |
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* @param array $mf The microfeeds2 parser response. |
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* |
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* @return array An array of feed items. |
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*/ |
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public function parse_hfeed( $mf ) { |
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if ( ! is_array( $mf ) ) { |
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return array(); |
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} |
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$feed_items = array(); |
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$entries = array(); |
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|
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// The following section is adapted from the SimplePie source. |
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// 2020-11-30: Modifications: set post format, handle videos. |
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// This should implement the https://www.w3.org/TR/post-type-discovery/ algorithm. |
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|
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$feed_author = null; |
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$h_feed = array(); |
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foreach ( $mf['items'] as $mf_item ) { |
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if ( in_array( 'h-feed', $mf_item['type'] ) ) { |
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$h_feed = $mf_item; |
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break; |
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} |
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// Also look for h-feed or h-entry in the children of each top level item. |
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if ( ! isset( $mf_item['children'][0]['type'] ) ) { |
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continue; |
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} |
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if ( in_array( 'h-feed', $mf_item['children'][0]['type'] ) ) { |
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$h_feed = $mf_item['children'][0]; |
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// In this case the parent of the h-feed may be an h-card, so use it as |
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// the feed_author. |
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if ( in_array( 'h-card', $mf_item['type'] ) ) { |
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$feed_author = $mf_item; |
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} |
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break; |
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} elseif ( in_array( 'h-entry', $mf_item['children'][0]['type'] ) ) { |
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$entries = $mf_item['children']; |
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// In this case the parent of the h-entry list may be an h-card, so use |
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// it as the feed_author. |
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if ( in_array( 'h-card', $mf_item['type'] ) ) { |
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$feed_author = $mf_item; |
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} |
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break; |
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} |
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} |
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|
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if ( isset( $h_feed['children'] ) ) { |
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$entries = $h_feed['children']; |
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} elseif ( empty( $entries ) ) { |
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$entries = $mf['items']; |
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} |
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|
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foreach ( $entries as $entry ) { |
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if ( isset( $entry['properties']['deleted'][0] ) || ! isset( $entry['properties']['published'][0] ) ) { |
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continue; |
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} |
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$item = new Feed_Item(); |
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$item->date = $entry['properties']['published'][0]; |
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$item->author = $feed_author; |
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|
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if ( isset( $entry['properties']['url'][0] ) ) { |
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$link = $entry['properties']['url'][0]; |
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if ( isset( $link['value'] ) ) { |
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$link = $link['value']; |
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} |
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$item->permalink = $link; |
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} |
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|
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if ( isset( $entry['properties']['uid'][0] ) ) { |
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$guid = $entry['properties']['uid'][0]; |
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if ( isset( $guid['value'] ) ) { |
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$guid = $guid['value']; |
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} |
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$item->permalink = $guid; |
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} |
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|
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if ( isset( $entry['properties']['name'][0] ) ) { |
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$title = $entry['properties']['name'][0]; |
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if ( isset( $title['value'] ) ) { |
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$title = $title['value']; |
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} |
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$item->title = $title; |
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} |
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|
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$content = ''; |
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foreach ( array( 'photo', 'video' ) as $media ) { |
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if ( ! isset( $entry['properties'][ $media ][0] ) ) { |
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continue; |
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} |
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|
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// If a $media is also in content, don't need to add it again here. |
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if ( isset( $entry['properties']['content'][0]['html'] ) ) { |
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$content = $entry['properties']['content'][0]['html']; |
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} |
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$el_list = array(); |
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for ( $j = 0; $j < count( $entry['properties'][ $media ] ); $j++ ) { |
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$el = $entry['properties'][ $media ][ $j ]; |
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if ( ! empty( $el ) && strpos( $content, $el ) === false ) { |
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$el_list[] = $el; |
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} |
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} |
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|
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if ( count( $el_list ) > 0 ) { |
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$set_id = preg_replace( '/[[:^alnum:]]/', '', $el_list[0] ); |
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$content = '<p>'; |
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foreach ( $el_list as $j => $el ) { |
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$hidden = 0 === $j ? '' : 'class="hidden" '; |
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$content .= '<a href="' . $el . '" ' . $hidden . |
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'data-lightbox="set-' . $set_id . '">'; |
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switch ( $media ) { |
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case 'photo': |
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$content .= '<img src="' . esc_url( $el ) . '" />'; |
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break; |
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case 'video': |
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$content .= '<video src="' . esc_url( $el ) . '" />'; |
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break; |
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} |
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$content .= '</a>'; |
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} |
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$content .= '<br><b>'; |
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switch ( $media ) { |
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case 'photo': |
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// translators: %s is the number of photos. |
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$content .= sprintf( _n( '%d photo', '%d photos', count( $el_list ), 'friends' ), count( $el_list ) ); |
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break; |
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case 'video': |
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// translators: %s is the number of videos. |
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$content .= sprintf( _n( '%d video', '%d videos', count( $el_list ), 'friends' ), count( $el_list ) ); |
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break; |
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} |
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$content .= '</b></p>'; |
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} |
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$item->format = $media; |
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} |
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|
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if ( isset( $entry['properties']['content'][0]['html'] ) ) { |
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$content .= $entry['properties']['content'][0]['html']; |
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if ( isset( $entry['properties']['in-reply-to'][0] ) ) { |
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$in_reply_to = ''; |
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if ( is_string( $entry['properties']['in-reply-to'][0] ) ) { |
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$in_reply_to = $entry['properties']['in-reply-to'][0]; |
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} elseif ( isset( $entry['properties']['in-reply-to'][0]['value'] ) ) { |
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$in_reply_to = $entry['properties']['in-reply-to'][0]['value']; |
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} |
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if ( '' !== $in_reply_to ) { |
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$content .= '<p><span class="in-reply-to"></span> ' . |
| 298 |
'<a href="' . $in_reply_to . '">' . $in_reply_to . '</a><p>'; |
| 299 |
} |
| 300 |
} |
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$item->content = $content; |
| 302 |
} |
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|
| 304 |
if ( isset( $entry['properties']['category'] ) ) { |
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$category_csv = ''; |
| 306 |
// Categories can also contain h-cards. |
| 307 |
foreach ( $entry['properties']['category'] as $category ) { |
| 308 |
if ( '' !== $category_csv ) { |
| 309 |
$category_csv .= ', '; |
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} |
| 311 |
if ( is_string( $category ) ) { |
| 312 |
// Can't have commas in categories. |
| 313 |
$category_csv .= str_replace( ',', '', $category ); |
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} else { |
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$category_csv .= $this->parse_hcard( $category, true ); |
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} |
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} |
| 318 |
$item->category = $category_csv; |
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} |
| 320 |
|
| 321 |
if ( ! $item->post_format && in_array( 'h-as-note', $entry['type'] ) ) { |
| 322 |
$item->post_format = 'status'; |
| 323 |
$item->title = ''; |
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} |
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|
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$feed_items[] = $item; |
| 327 |
} |
| 328 |
|
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return $feed_items; |
| 330 |
} |
| 331 |
|
| 332 |
/** |
| 333 |
* Fetches a feed and returns the processed items. |
| 334 |
* |
| 335 |
* @param string $url The url. |
| 336 |
* @param User_Feed $user_feed The user feed. |
| 337 |
* |
| 338 |
* @return array An array of feed items. |
| 339 |
*/ |
| 340 |
public function fetch_feed( $url, User_Feed $user_feed = null ) { |
| 341 |
$mf = Mf2\fetch( $url ); |
| 342 |
if ( ! $mf ) { |
| 343 |
// translators: %s is a URL. |
| 344 |
return new \WP_Error( 'microformats Parser', sprintf( __( 'Could not parse %s.', 'friends' ), $url ) ); |
| 345 |
} |
| 346 |
|
| 347 |
return $this->parse_hfeed( $mf ); |
| 348 |
} |
| 349 |
} |
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|
