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<?php |
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namespace Activitypub; |
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|
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/** |
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* ActivityPub Hashtag Class |
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* |
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* @author Matthias Pfefferle |
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*/ |
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class Hashtag { |
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/** |
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* Initialize the class, registering WordPress hooks |
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*/ |
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public static function init() { |
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if ( '1' === get_option( 'activitypub_use_hashtags', '1' ) ) { |
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add_filter( 'wp_insert_post', array( '\Activitypub\Hashtag', 'insert_post' ), 99, 2 ); |
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add_filter( 'the_content', array( '\Activitypub\Hashtag', 'the_content' ), 99, 2 ); |
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} |
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if ( '1' === get_option( 'activitypub_add_tags_as_hashtags', '0' ) ) { |
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add_filter( 'activitypub_the_summary', array( '\Activitypub\Hashtag', 'add_hashtags_to_content' ), 10, 2 ); |
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add_filter( 'activitypub_the_content', array( '\Activitypub\Hashtag', 'add_hashtags_to_content' ), 10, 2 ); |
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} |
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} |
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|
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/** |
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* Filter to save #tags as real WordPress tags |
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* |
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* @param int $id the rev-id |
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* @param array $data the post-data as array |
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* |
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* @return |
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*/ |
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public static function insert_post( $id, $data ) { |
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if ( preg_match_all( '/' . ACTIVITYPUB_HASHTAGS_REGEXP . '/i', $data->post_content, $match ) ) { |
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$tags = implode( ', ', $match[1] ); |
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|
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wp_add_post_tags( $data->post_parent, $tags ); |
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} |
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|
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return $id; |
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} |
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|
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/** |
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* Filter to replace the #tags in the content with links |
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* |
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* @param string $the_content the post-content |
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* |
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* @return string the filtered post-content |
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*/ |
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public static function the_content( $the_content ) { |
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$the_content = preg_replace_callback( '/' . ACTIVITYPUB_HASHTAGS_REGEXP . '/i', array( '\Activitypub\Hashtag', 'replace_with_links' ), $the_content ); |
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|
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return $the_content; |
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} |
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|
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/** |
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* A callback for preg_replace to build the term links |
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* |
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* @param array $result the preg_match results |
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* @return string the final string |
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*/ |
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public static function replace_with_links( $result ) { |
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$tag = $result[1]; |
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$tag_object = get_term_by( 'name', $tag, 'post_tag' ); |
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|
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if ( $tag_object ) { |
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$link = get_term_link( $tag_object, 'post_tag' ); |
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return sprintf( '<a rel="tag" class="u-tag u-category" href="%s">#%s</a>', $link, $tag ); |
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} |
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|
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return '#' . $tag; |
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} |
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|
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/** |
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* Adds all tags as hashtags to the post/summary content |
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* |
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* @param string $content |
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* @param WP_Post $post |
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* |
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* @return string |
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*/ |
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public static function add_hashtags_to_content( $content, $post ) { |
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$tags = get_the_tags( $post->ID ); |
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|
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if ( ! $tags ) { |
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return $content; |
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} |
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|
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$hash_tags = array(); |
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|
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foreach ( $tags as $tag ) { |
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$hash_tags[] = sprintf( '<a rel="tag" class="u-tag u-category" href="%s">#%s</a>', get_tag_link( $tag ), $tag->slug ); |
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} |
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|
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return $content . '<p>' . implode( ' ', $hash_tags ) . '</p>'; |
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} |
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} |
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|
