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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( self::class, 'insert_post' ), 10, 2 ); |
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\add_filter( 'the_content', array( self::class, 'the_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 WP_Post $post the post |
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* |
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* @return |
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*/ |
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public static function insert_post( $id, $post ) { |
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if ( \preg_match_all( '/' . ACTIVITYPUB_HASHTAGS_REGEXP . '/i', $post->post_content, $match ) ) { |
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$tags = \implode( ', ', $match[1] ); |
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|
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\wp_add_post_tags( $post->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( $the_content ) { |
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$protected_tags = array(); |
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$protect = function( $m ) use ( &$protected_tags ) { |
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$c = \wp_rand( 100000, 999999 ); |
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$protect = '!#!#PROTECT' . $c . '#!#!'; |
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while ( isset( $protected_tags[ $protect ] ) ) { |
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$c = \wp_rand( 100000, 999999 ); |
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$protect = '!#!#PROTECT' . $c . '#!#!'; |
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} |
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$protected_tags[ $protect ] = $m[0]; |
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return $protect; |
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}; |
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$the_content = preg_replace_callback( |
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'#<!\[CDATA\[.*?\]\]>#is', |
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$protect, |
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$the_content |
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); |
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$the_content = preg_replace_callback( |
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'#<(pre|code|textarea|style)\b[^>]*>.*?</\1[^>]*>#is', |
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$protect, |
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$the_content |
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); |
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$the_content = preg_replace_callback( |
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'#<[^>]+>#i', |
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$protect, |
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$the_content |
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); |
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|
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$the_content = \preg_replace_callback( '/' . ACTIVITYPUB_HASHTAGS_REGEXP . '/i', array( '\Activitypub\Hashtag', 'replace_with_links' ), $the_content ); |
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|
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$the_content = str_replace( array_reverse( array_keys( $protected_tags ) ), array_reverse( array_values( $protected_tags ) ), $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="hashtag 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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|
