/**
 * WordPress 根据评论数量来判断是否显示评论者链接 - 龙笑天下
 * https://www.ilxtx.com/display-or-hide-comment-links-according-to-comments-number.html
 * 原作者：https://fatesinger.com/78892
 */
function lxtx_fa_is_friend( $email = null , $num = 5 ){
    $count = get_comments(array(
        'author_email' => $email,
        'count' => true,
    ));
    return ( $count > $num );
}

function lxtx_fa_update_friend_list( $comment_id ){
    $comment = get_comment($comment_id);
    $friend_list = get_option('friend_list') ? get_option('friend_list') : array();
    $email = $comment->comment_author_email;
    if ( lxtx_fa_is_friend($email) && !in_array( $email , $friend_list) ) {
        $friend_list[] = $email;
        update_option('friend_list',$friend_list);
    }
}
add_action('comment_post', 'lxtx_fa_update_friend_list');

function lxtx_fa_show_friend_link( $return , $author, $comment_ID ){
    $comment = get_comment( $comment_ID );
    $email = $comment->comment_author_email;
    $friend_list = get_option('friend_list') ? get_option('friend_list') : array();
    if ( in_array($email,$friend_list) ) {
        return $return;
    } else {
        return $author;
    }
}
add_filter('get_comment_author_link','lxtx_fa_show_friend_link',10,3);