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<?php |
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/** |
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* Common utilities for the plugin |
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* |
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*/ |
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|
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if( ! defined( 'ABSPATH' ) ) exit; |
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|
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class SRR_Utilities{ |
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|
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public static function init(){ |
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|
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add_filter( 'the_excerpt_rss', array( __CLASS__, 'insert_featured_image_rss_feed' ) ); |
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add_filter( 'the_content_feed', array( __CLASS__, 'insert_featured_image_rss_feed' ) ); |
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|
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add_filter( 'commentrss2_item', array( __CLASS__, 'insert_avatar_comments_feed' ), 10, 2 ); |
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|
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add_filter( 'wp_feed_options', array( __CLASS__, 'set_user_agent' ), 10, 2 ); |
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|
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} |
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|
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public static function insert_featured_image_rss_feed( $content ){ |
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|
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global $post; |
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|
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preg_match_all( '~<img.*?src=["\']+(.*?)["\']+~', $content ?? '', $image_urls ); |
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|
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if( empty( $image_urls[1] ) && has_post_thumbnail( $post->ID ) ) { |
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$content = '<p>' . get_the_post_thumbnail( $post->ID ) . '</p>' . $content; |
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} |
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|
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return $content; |
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|
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} |
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|
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public static function insert_avatar_comments_feed( $comment_id, $comment_post_id ){ |
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|
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$comment = get_comment( $comment_id ); |
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$avatar_url = get_avatar_url( $comment ); |
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|
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if( $avatar_url ){ |
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echo '<media:thumbnail url="' . esc_attr( $avatar_url ) . '" />'; |
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} |
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|
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} |
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|
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public static function set_user_agent( &$feed, $url ) { |
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|
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$feed->set_useragent( 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36' ); |
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|
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} |
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|
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public static function date_i18n( $format, $timestamp, $timezone ){ |
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|
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try{ |
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$timezone = new DateTimeZone( trim( $timezone ) ); |
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}catch( Exception $e ) { |
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$timezone = new DateTimeZone( 'UTC' ); |
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} |
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|
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$date = wp_date( $format, $timestamp, $timezone ); |
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|
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return $date; |
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|
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} |
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|
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public static function is_valid_image_url( $item, $url ){ |
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|
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// Does it begin with http? |
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if( strpos( $url, 'http' ) === 0 ){ |
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return true; |
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} |
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|
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// If it does not begin with http, then check if the RSS feed is of the current domain |
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$wp_domain = parse_url( get_site_url(), PHP_URL_HOST ); |
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return strpos( $item->get_link(), $wp_domain ) !== false; |
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|
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} |
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|
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public static function parse_image_url( $item, $content ){ |
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|
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$attributes = array( |
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'src' => '~<img.*?src=["\']+(.*?)["\']+~', |
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'srcset' => '~<img.*?srcset=["\']+(.*?)["\']+~' |
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); |
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|
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foreach( $attributes as $attribute => $regex ){ |
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preg_match( $regex, $content ?? '', $urls ); |
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|
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if( empty( $urls ) ){ |
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continue; |
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} |
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$parsed_url = $urls[1]; |
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|
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if( $attribute == 'srcset' ){ |
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$srcset_urls = explode( ',' , $parsed_url ); |
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$parsed_url = explode( ' ', $srcset_urls[0] )[0]; |
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} |
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|
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if( self::is_valid_image_url( $item, $parsed_url ) ){ |
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return $parsed_url; |
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} |
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} |
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|
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return ''; |
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|
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} |
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|
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} |
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|
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SRR_Utilities::init(); |
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|
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?> |
