diff options
Diffstat (limited to 'plugins/jetpack/class.jetpack-twitter-cards.php')
| -rw-r--r-- | plugins/jetpack/class.jetpack-twitter-cards.php | 270 |
1 files changed, 0 insertions, 270 deletions
diff --git a/plugins/jetpack/class.jetpack-twitter-cards.php b/plugins/jetpack/class.jetpack-twitter-cards.php deleted file mode 100644 index 63d19917..00000000 --- a/plugins/jetpack/class.jetpack-twitter-cards.php +++ /dev/null @@ -1,270 +0,0 @@ -<?php - -/* Twitter Cards - * - * Hooks onto the Open Graph protocol and extends it by adding only the tags - * we need for twitter cards. - * - * @see /wp-content/blog-plugins/open-graph.php - * @see https://dev.twitter.com/cards/overview - */ -class Jetpack_Twitter_Cards { - - static function twitter_cards_tags( $og_tags ) { - global $post; - - /** - * Maximum alt text length. - * - * @see https://developer.twitter.com/en/docs/tweets/optimize-with-cards/overview/summary-card-with-large-image.html - */ - $alt_length = 420; - - if ( post_password_required() ) { - return $og_tags; - } - - /** This action is documented in class.jetpack.php */ - if ( apply_filters( 'jetpack_disable_twitter_cards', false ) ) { - return $og_tags; - } - - /* - * These tags apply to any page (home, archives, etc) - */ - - // If we have information on the author/creator, then include that as well - if ( ! empty( $post ) && ! empty( $post->post_author ) ) { - /** This action is documented in modules/sharedaddy/sharing-sources.php */ - $handle = apply_filters( 'jetpack_sharing_twitter_via', '', $post->ID ); - if ( ! empty( $handle ) && ! self::is_default_site_tag( $handle ) ) { - $og_tags['twitter:creator'] = self::sanitize_twitter_user( $handle ); - } - } - - $site_tag = self::site_tag(); - /** This action is documented in modules/sharedaddy/sharing-sources.php */ - $site_tag = apply_filters( 'jetpack_sharing_twitter_via', $site_tag, ( is_singular() ? $post->ID : null ) ); - /** This action is documented in modules/sharedaddy/sharing-sources.php */ - $site_tag = apply_filters( 'jetpack_twitter_cards_site_tag', $site_tag, $og_tags ); - if ( ! empty( $site_tag ) ) { - $og_tags['twitter:site'] = self::sanitize_twitter_user( $site_tag ); - } - - if ( ! is_singular() || ! empty( $og_tags['twitter:card'] ) ) { - /** - * Filter the default Twitter card image, used when no image can be found in a post. - * - * @module sharedaddy, publicize - * - * @since 5.9.0 - * - * @param string $str Default image URL. - */ - $image = apply_filters( 'jetpack_twitter_cards_image_default', '' ); - if ( ! empty( $image ) ) { - $og_tags['twitter:image'] = $image; - } - - return $og_tags; - } - - $the_title = get_the_title(); - if ( ! $the_title ) { - $the_title = get_bloginfo( 'name' ); - } - $og_tags['twitter:text:title'] = $the_title; - - /* - * The following tags only apply to single pages. - */ - - $card_type = 'summary'; - - // Try to give priority to featured images - if ( class_exists('Jetpack_PostImages') ) { - $featured = Jetpack_PostImages::from_thumbnail( $post->ID, 240, 240 ); - if ( !empty( $featured ) && count( $featured ) > 0 ) { - if ( (int) $featured[0]['src_width'] >= 280 && (int) $featured[0]['src_height'] >= 150 ) { - $card_type = 'summary_large_image'; - $og_tags['twitter:image'] = esc_url( add_query_arg( 'w', 640, $featured[0]['src'] ) ); - } else { - $og_tags['twitter:image'] = esc_url( add_query_arg( 'w', 240, $featured[0]['src'] ) ); - } - - // Add the alt tag if we have one. - if ( ! empty( $featured[0]['alt_text'] ) ) { - // Shorten it if it is too long. - if ( strlen( $featured[0]['alt_text'] ) > $alt_length ) { - $og_tags['twitter:image:alt'] = esc_attr( mb_substr( $featured[0]['alt_text'], 0, $alt_length ) . '…' ); - } else { - $og_tags['twitter:image:alt'] = esc_attr( $featured[0]['alt_text'] ); - } - } - } - } - - // Only proceed with media analysis if a featured image has not superseded it already. - if ( empty( $og_tags['twitter:image'] ) && empty( $og_tags['twitter:image:src'] ) ) { - if ( ! class_exists( 'Jetpack_Media_Summary' ) && defined('IS_WPCOM') && IS_WPCOM ) { - include( WP_CONTENT_DIR . '/lib/class.wpcom-media-summary.php' ); - } - - if ( ! class_exists( 'Jetpack_Media_Summary' ) ) { - jetpack_require_lib( 'class.media-summary' ); - } - - // Test again, class should already be auto-loaded in Jetpack. - // If not, skip extra media analysis and stick with a summary card - if ( class_exists( 'Jetpack_Media_Summary' ) ) { - $extract = Jetpack_Media_Summary::get( $post->ID ); - - if ( 'gallery' == $extract['type'] ) { - list( $og_tags, $card_type ) = self::twitter_cards_define_type_based_on_image_count( $og_tags, $extract ); - } elseif ( 'video' == $extract['type'] ) { - // Leave as summary, but with large pict of poster frame (we know those comply to Twitter's size requirements) - $card_type = 'summary_large_image'; - $og_tags['twitter:image'] = esc_url( add_query_arg( 'w', 640, $extract['image'] ) ); - } else { - list( $og_tags, $card_type ) = self::twitter_cards_define_type_based_on_image_count( $og_tags, $extract ); - } - } - } - - $og_tags['twitter:card'] = $card_type; - - // Make sure we have a description for Twitter, their validator isn't happy without some content (single space not valid). - if ( ! isset( $og_tags['og:description'] ) || '' == trim( $og_tags['og:description'] ) || __('Visit the post for more.', 'jetpack') == $og_tags['og:description'] ) { // empty( trim( $og_tags['og:description'] ) ) isn't valid php - $has_creator = ( ! empty($og_tags['twitter:creator']) && '@wordpressdotcom' != $og_tags['twitter:creator'] ) ? true : false; - if ( ! empty( $extract ) && 'video' == $extract['type'] ) { // use $extract['type'] since $card_type is 'summary' for video posts - /* translators: %s is the post author */ - $og_tags['twitter:description'] = ( $has_creator ) ? sprintf( __( 'Video post by %s.', 'jetpack' ), $og_tags['twitter:creator'] ) : __( 'Video post.', 'jetpack' ); - } else { - /* translators: %s is the post author */ - $og_tags['twitter:description'] = ( $has_creator ) ? sprintf( __( 'Post by %s.', 'jetpack' ), $og_tags['twitter:creator'] ) : __( 'Visit the post for more.', 'jetpack'); - } - } - - if ( empty( $og_tags['twitter:image'] ) && empty( $og_tags['twitter:image:src'] ) ) { - /** This action is documented in class.jetpack-twitter-cards.php */ - $image = apply_filters( 'jetpack_twitter_cards_image_default', '' ); - if ( ! empty( $image ) ) { - $og_tags['twitter:image'] = $image; - } - } - - return $og_tags; - } - - static function sanitize_twitter_user( $str ) { - return '@' . preg_replace( '/^@/', '', $str ); - } - - static function is_default_site_tag( $site_tag ) { - return in_array( $site_tag, array( '@wordpressdotcom', '@jetpack', 'wordpressdotcom', 'jetpack' ) ); - } - - static function prioritize_creator_over_default_site( $site_tag, $og_tags = array() ) { - if ( ! empty( $og_tags['twitter:creator'] ) && self::is_default_site_tag( $site_tag ) ) { - return $og_tags['twitter:creator']; - } - return $site_tag; - } - - static function twitter_cards_define_type_based_on_image_count( $og_tags, $extract ) { - $card_type = 'summary'; - $img_count = $extract['count']['image']; - - if ( empty( $img_count ) ) { - - // No images, use Blavatar as a thumbnail for the summary type. - if ( function_exists('blavatar_domain') ) { - $blavatar_domain = blavatar_domain( site_url() ); - if ( blavatar_exists( $blavatar_domain ) ) { - $og_tags['twitter:image'] = blavatar_url( $blavatar_domain, 'img', 240 ); - } - } - - // Second fall back, Site Logo - if ( empty( $og_tags['twitter:image'] ) && ( function_exists( 'jetpack_has_site_logo' ) && jetpack_has_site_logo() ) ) { - $og_tags['twitter:image'] = jetpack_get_site_logo( 'url' ); - } - - // Third fall back, Site Icon - if ( empty( $og_tags['twitter:image'] ) && has_site_icon() ) { - $og_tags['twitter:image'] = get_site_icon_url( '240' ); - } - - // Not falling back on Gravatar, because there's no way to know if we end up with an auto-generated one. - - } elseif ( $img_count && ( 'image' == $extract['type'] || 'gallery' == $extract['type'] ) ) { - // Test for $extract['type'] to limit to image and gallery, so we don't send a potential fallback image like a Gravatar as a photo post. - $card_type = 'summary_large_image'; - $og_tags['twitter:image'] = esc_url( add_query_arg( 'w', 1400, ( empty( $extract['images'] ) ) ? $extract['image'] : $extract['images'][0]['url'] ) ); - } - - return array( $og_tags, $card_type ); - } - - static function twitter_cards_output( $og_tag ) { - return ( false !== strpos( $og_tag, 'twitter:' ) ) ? preg_replace( '/property="([^"]+)"/', 'name="\1"', $og_tag ) : $og_tag; - } - - static function settings_init() { - add_settings_section( 'jetpack-twitter-cards-settings', 'Twitter Cards', '__return_false', 'sharing' ); - add_settings_field( - 'jetpack-twitter-cards-site-tag', - __( 'Twitter Site Tag', 'jetpack' ), - array( __CLASS__, 'settings_field' ), - 'sharing', - 'jetpack-twitter-cards-settings', - array( - 'label_for' => 'jetpack-twitter-cards-site-tag', - ) - ); - } - - static function sharing_global_options() { - do_settings_fields( 'sharing', 'jetpack-twitter-cards-settings' ); - } - - static function site_tag() { - $site_tag = ( defined( 'IS_WPCOM' ) && IS_WPCOM ) ? - trim( get_option( 'twitter_via' ) ) : - Jetpack_Options::get_option_and_ensure_autoload( 'jetpack-twitter-cards-site-tag', '' ); - if ( empty( $site_tag ) ) { - if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) { - return 'wordpressdotcom'; - } else { - return; - } - } - return $site_tag; - } - - static function settings_field() { - wp_nonce_field( 'jetpack-twitter-cards-settings', 'jetpack_twitter_cards_nonce', false ); - ?> - <input type="text" id="jetpack-twitter-cards-site-tag" class="regular-text" name="jetpack-twitter-cards-site-tag" value="<?php echo esc_attr( get_option( 'jetpack-twitter-cards-site-tag' ) ); ?>" /> - <p class="description" style="width: auto;"><?php esc_html_e( 'The Twitter username of the owner of this site\'s domain.', 'jetpack' ); ?></p> - <?php - } - - static function settings_validate() { - if ( wp_verify_nonce( $_POST['jetpack_twitter_cards_nonce'], 'jetpack-twitter-cards-settings' ) ) { - update_option( 'jetpack-twitter-cards-site-tag', trim( ltrim( strip_tags( $_POST['jetpack-twitter-cards-site-tag'] ), '@' ) ) ); - } - } - - static function init() { - add_filter( 'jetpack_open_graph_tags', array( __CLASS__, 'twitter_cards_tags' ) ); - add_filter( 'jetpack_open_graph_output', array( __CLASS__, 'twitter_cards_output' ) ); - add_filter( 'jetpack_twitter_cards_site_tag', array( __CLASS__, 'site_tag' ), -99 ); - add_filter( 'jetpack_twitter_cards_site_tag', array( __CLASS__, 'prioritize_creator_over_default_site' ), 99, 2 ); - add_action( 'admin_init', array( __CLASS__, 'settings_init' ) ); - add_action( 'sharing_global_options', array( __CLASS__, 'sharing_global_options' ) ); - add_action( 'sharing_admin_update', array( __CLASS__, 'settings_validate' ) ); - } -} - -Jetpack_Twitter_Cards::init(); |