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authorYury German <blueknight@gentoo.org>2019-05-22 01:01:36 -0400
committerYury German <blueknight@gentoo.org>2019-05-22 01:01:36 -0400
commit0914c92da22824025992c368c745546e41fbeb84 (patch)
tree965f6adf3b725e56d559fe4a93eff02281499dcc /plugins/jetpack/class.jetpack-twitter-cards.php
parentDeleting plugins for update (diff)
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Adding Plugins
Updating the following akismet.4.1.2, google-authenticator.0.52, jetpack.7.3.1 Signed-off-by: Yury German <blueknight@gentoo.org>
Diffstat (limited to 'plugins/jetpack/class.jetpack-twitter-cards.php')
-rw-r--r--plugins/jetpack/class.jetpack-twitter-cards.php270
1 files changed, 270 insertions, 0 deletions
diff --git a/plugins/jetpack/class.jetpack-twitter-cards.php b/plugins/jetpack/class.jetpack-twitter-cards.php
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+++ b/plugins/jetpack/class.jetpack-twitter-cards.php
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+<?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();