pfefferle/wordpress-semantic-linkbacks

<?php
/**
 * Comment walker subclass that skips facepile webmention comments and stores
 * emoji reactions (https://indieweb.org/reacji).
 *
 * Based on https://codex.wordpress.org/Function_Reference/Walker_Comment
 */
class Semantic_Linkbacks_Walker_Comment extends Walker_Comment {
    public static $reactions = array();

    protected static function should_facepile( $comment ) {
        $facepiles = get_option( 'semantic_linkbacks_facepiles', array_keys( Linkbacks_Handler::get_comment_type_strings() ) );
        //    If getting the facepiles hasn't worked, create an empty array to avoid generating errors
        if ( ! is_array( $facepiles ) ) {
            $facepiles = array();
        }

        if ( self::is_reaction( $comment ) && in_array( 'reaction', $facepiles, true ) ) {
            return true;
        }

        $type = Linkbacks_Handler::get_type( $comment );

        $type = explode( ':', $type );

        if ( is_array( $type ) ) {
            $type = $type[0];
        }

        return $type && 'reply' !== $type && in_array( $type, $facepiles, true );
    }

    protected static function get_comment_author_link( $comment_id = 0 ) {
        $comment = get_comment( $comment_id );
        $url     = get_comment_author_url( $comment );
        $author  = get_comment_author( $comment );

        if ( empty( $url ) || 'http://' === $url ) {
            $return = sprintf( '<span class="p-name">%s</span>', $author );
        } else {
            $return = sprintf( '<a href="%s" rel="external" class="u-url p-name">%s</a>', $url, $author );
        }

        /**
         * Filters the comment author's link for display.
         *
         * @since 1.5.0
         * @since 4.1.0 The `$author` and `$comment_ID` parameters were added
         * @param string $return     The HTML-formatted comment author link.
         *                           Empty for an invalid URL.
         * @param string $author     The comment author's username.
         * @param int    $comment_ID The comment ID.
         */
        return apply_filters( 'get_comment_author_link', $return, $author, $comment->comment_ID );
    }

    protected static function is_reaction( $comment ) {
        // If this library is not installed then emoji detection will not work
        if ( ! function_exists( 'mb_internal_encoding' ) ) {
            return false;
        }
        return Emoji\is_single_emoji( trim( wp_strip_all_tags( $comment->comment_content ) ) ) && empty( $comment->comment_parent );
    }

    public function start_el( &$output, $comment, $depth = 0, $args = array(), $id = 0 ) {
        if ( self::is_reaction( $comment ) ) {
            self::$reactions[] = $comment;
        }

        if ( ! self::should_facepile( $comment ) ) {
            return parent::start_el( $output, $comment, $depth, $args, $id );
        }
    }

    public function end_el( &$output, $comment, $depth = 0, $args = array() ) {
        if ( ! self::should_facepile( $comment ) ) {
            return parent::end_el( $output, $comment, $depth, $args );
        }
    }

    protected function html5_comment( $comment, $depth, $args ) {
        // To use the default html5_comment set this filter to false
        if ( ! Linkbacks_Handler::render_comments() ) {
            parent::html5_comment( $comment, $depth, $args );
            return;
        }
        $tag   = ( 'div' === $args['style'] ) ? 'div' : 'li';
        $cite  = apply_filters( 'semantic_linkbacks_cite', '<small>&nbsp;@&nbsp;<cite><a href="%1s">%2s</a></cite></small>' );
        $type  = Linkbacks_Handler::get_type( $comment );
        $url   = Linkbacks_Handler::get_url( $comment );
        $coins = Linkbacks_Handler::get_prop( $comment, 'mf2_swarm-coins' );
        $host  = wp_parse_url( $url, PHP_URL_HOST );
        // strip leading www, if any
        $host = preg_replace( '/^www\./', '', $host );
        ?>
        <<?php echo $tag; ?> id="comment-<?php comment_ID(); ?>" <?php comment_class( $this->has_children ? 'parent' : '', $comment ); ?>>
            <article id="div-comment-<?php comment_ID(); ?>" class="comment-body">
                <footer class="comment-meta">
                    <div class="comment-author vcard h-card u-author">
                        <?php
                        if ( 0 !== $args['avatar_size'] ) {
                            echo get_avatar( $comment, $args['avatar_size'] );}
                        ?>
                        <?php
                            /* translators: %s: comment author */
                            printf(
                                /* translators: %s: comment author link */
                                __( '%s <span class="says">says:</span>', 'semantic-linkbacks' ),
                                sprintf( '<b class="fn">%s</b>', self::get_comment_author_link( $comment ) )
                            );
                        if ( $type && ! empty( $cite ) ) {
                            printf( $cite, $url, $host );
                        }

                        ?>
                    </div><!-- .comment-author -->

                    <div class="comment-metadata">
                    <?php
                    if ( $coins ) {
                        // translators: Number of Swarm Coins
                        printf( _n( '+%d coin', '+%d coins', (int) $coins, 'semantic-linkbacks' ), $coins );
                        echo ' / ';
                    }
                    ?>



                        <a class="u-url" href="<?php echo esc_url( get_comment_link( $comment, $args ) ); ?>">
                            <time class="dt-published" datetime="<?php comment_time( DATE_W3C ); ?>">
                                <?php
                                    /* translators: 1: comment date, 2: comment time */
                                    printf( __( '%1$s at %2$s', 'semantic-linkbacks' ), get_comment_date( '', $comment ), get_comment_time() );
                                ?>
                            </time>
                        </a>
                        <?php edit_comment_link( __( 'Edit', 'semantic-linkbacks' ), '<span class="edit-link">', '</span>' ); ?>
                    </div><!-- .comment-metadata -->

                    <?php if ( '0' === $comment->comment_approved ) : ?>
                    <p class="comment-awaiting-moderation"><?php _e( 'Your response is awaiting moderation.', 'semantic-linkbacks' ); ?></p>
                    <?php endif; ?>
                </footer><!-- .comment-meta -->

                <div class="comment-content e-content p-name">
                    <?php comment_text(); ?>
                </div><!-- .comment-content -->

                <?php
                comment_reply_link(
                    array_merge(
                        $args,
                        array(
                            'add_below' => 'div-comment',
                            'depth'     => $depth,
                            'max_depth' => $args['max_depth'],
                            'before'    => '<div class="reply">',
                            'after'     => '</div>',
                        )
                    )
                );
                ?>
            </article><!-- .comment-body -->
            <?php
    }
}