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<?php |
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namespace Activitypub; |
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|
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/** |
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* ActivityPub Class |
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* |
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* @author Matthias Pfefferle |
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*/ |
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class Activitypub { |
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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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add_filter( 'template_include', array( '\Activitypub\Activitypub', 'render_json_template' ), 99 ); |
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add_filter( 'query_vars', array( '\Activitypub\Activitypub', 'add_query_vars' ) ); |
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add_action( 'init', array( '\Activitypub\Activitypub', 'add_rewrite_endpoint' ) ); |
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add_filter( 'pre_get_avatar_data', array( '\Activitypub\Activitypub', 'pre_get_avatar_data' ), 11, 2 ); |
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|
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add_post_type_support( 'post', 'activitypub' ); |
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add_post_type_support( 'page', 'activitypub' ); |
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|
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add_action( 'transition_post_status', array( '\Activitypub\Activitypub', 'schedule_post_activity' ), 10, 3 ); |
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} |
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|
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/** |
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* Return a AS2 JSON version of an author, post or page |
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* |
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* @param string $template the path to the template object |
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* |
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* @return string the new path to the JSON template |
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*/ |
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public static function render_json_template( $template ) { |
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if ( ! is_author() && ! is_singular() ) { |
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return $template; |
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} |
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|
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if ( is_author() ) { |
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$json_template = dirname( __FILE__ ) . '/../templates/json-author.php'; |
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} elseif ( is_singular() ) { |
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$json_template = dirname( __FILE__ ) . '/../templates/json-post.php'; |
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} |
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|
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global $wp_query; |
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|
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if ( isset( $wp_query->query_vars['activitypub'] ) ) { |
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return $json_template; |
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} |
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|
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if ( ! isset( $_SERVER['HTTP_ACCEPT'] ) ) { |
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return $template; |
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} |
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|
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// interpret accept header |
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$pos = stripos( $_SERVER['HTTP_ACCEPT'], ';' ); |
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if ( $pos ) { |
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$accept_header = substr( $_SERVER['HTTP_ACCEPT'], 0, $pos ); |
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} else { |
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$accept_header = $_SERVER['HTTP_ACCEPT']; |
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} |
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// accept header as an array |
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$accept = explode( ',', trim( $accept_header ) ); |
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|
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if ( |
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! in_array( 'application/activity+json', $accept, true ) && |
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! in_array( 'application/ld+json', $accept, true ) && |
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! in_array( 'application/json', $accept, true ) |
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) { |
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return $template; |
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} |
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|
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return $json_template; |
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} |
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|
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/** |
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* Add the 'photos' query variable so WordPress |
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* won't mangle it. |
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*/ |
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public static function add_query_vars( $vars ) { |
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$vars[] = 'activitypub'; |
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|
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return $vars; |
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} |
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|
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/** |
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* Add our rewrite endpoint to permalinks and pages. |
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*/ |
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public static function add_rewrite_endpoint() { |
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add_rewrite_endpoint( 'activitypub', EP_AUTHORS | EP_PERMALINK | EP_PAGES ); |
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} |
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|
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/** |
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* Marks the post as "no webmentions sent yet" |
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* |
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* @param int $post_id |
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*/ |
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public static function schedule_post_activity( $new_status, $old_status, $post ) { |
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// do not send activities if post is password protected |
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if ( post_password_required( $post ) ) { |
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return; |
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} |
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|
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// check if post-type supports ActivityPub |
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$post_types = get_post_types_by_support( 'activitypub' ); |
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if ( ! in_array( $post->post_type, $post_types, true ) ) { |
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return; |
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} |
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|
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if ( 'publish' === $new_status && 'publish' !== $old_status ) { |
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wp_schedule_single_event( time() + wp_rand( 0, 120 ), 'activitypub_send_post_activity', array( $post->ID ) ); |
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} elseif ( 'publish' === $new_status ) { |
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wp_schedule_single_event( time() + wp_rand( 0, 120 ), 'activitypub_send_update_activity', array( $post->ID ) ); |
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} |
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} |
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|
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/** |
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* Replaces the default avatar |
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* |
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* @param array $args Arguments passed to get_avatar_data(), after processing. |
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* @param int|string|object $id_or_email A user ID, email address, or comment object |
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* |
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* @return array $args |
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*/ |
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public static function pre_get_avatar_data( $args, $id_or_email ) { |
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if ( |
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! $id_or_email instanceof \WP_Comment || |
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! isset( $id_or_email->comment_type ) || |
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$id_or_email->user_id |
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) { |
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return $args; |
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} |
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|
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$allowed_comment_types = apply_filters( 'get_avatar_comment_types', array( 'comment' ) ); |
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if ( ! empty( $id_or_email->comment_type ) && ! in_array( $id_or_email->comment_type, (array) $allowed_comment_types, true ) ) { |
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$args['url'] = false; |
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/** This filter is documented in wp-includes/link-template.php */ |
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return apply_filters( 'get_avatar_data', $args, $id_or_email ); |
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} |
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|
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// check if comment has an avatar |
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$avatar = self::get_avatar_url( $id_or_email->comment_ID ); |
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|
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if ( $avatar ) { |
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if ( ! isset( $args['class'] ) || ! is_array( $args['class'] ) ) { |
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$args['class'] = array( 'u-photo' ); |
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} else { |
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$args['class'][] = 'u-photo'; |
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$args['class'] = array_unique( $args['class'] ); |
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} |
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$args['url'] = $avatar; |
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$args['class'][] = 'avatar-activitypub'; |
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} |
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|
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return $args; |
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} |
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|
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/** |
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* Function to retrieve Avatar URL if stored in meta |
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* |
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* |
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* @param int|WP_Comment $comment |
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* |
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* @return string $url |
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*/ |
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public static function get_avatar_url( $comment ) { |
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if ( is_numeric( $comment ) ) { |
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$comment = get_comment( $comment ); |
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} |
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return get_comment_meta( $comment->comment_ID, 'avatar_url', true ); |
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} |
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} |
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|
