299 lines
10 KiB
PHP
299 lines
10 KiB
PHP
<?php
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namespace Activitypub;
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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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// Add support for ActivityPub to custom post types
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$post_types = \get_option( 'activitypub_support_post_types', array( 'post', 'page' ) ) ? \get_option( 'activitypub_support_post_types', array( 'post', 'page' ) ) : array();
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foreach ( $post_types as $post_type ) {
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\add_post_type_support( $post_type, '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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\add_filter( 'preprocess_comment', array( '\Activitypub\Activitypub', 'preprocess_comment' ) );
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\add_filter( 'comment_post', array( '\Activitypub\Activitypub', 'postprocess_comment' ), 10, 3 );
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\add_filter( 'wp_update_comment_data', array( '\Activitypub\Activitypub', 'comment_updated_published' ), 20, 3 );
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\add_action( 'transition_comment_status', array( '\Activitypub\Activitypub', 'schedule_comment_activity' ), 20, 3 );
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\add_action( 'edit_comment', array( '\Activitypub\Activitypub', 'edit_comment' ), 20, 2 );//schedule_admin_comment_activity
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\add_filter( 'get_comment_text', array( '\Activitypub\Activitypub', 'comment_append_edit_datetime' ), 10, 3 );
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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() && ! \is_home() && ! \Activitypub\is_ap_comment() && ! \Activitypub\is_ap_replies() ) {
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return $template;
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}
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if ( \is_author() ) {
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$json_template = \dirname( __FILE__ ) . '/../templates/author-json.php';
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} elseif ( \Activitypub\is_ap_replies() ) {
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$json_template = \dirname( __FILE__ ) . '/../templates/replies-json.php';
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} elseif ( \Activitypub\is_ap_comment() ) {
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$json_template = \dirname( __FILE__ ) . '/../templates/comment-json.php';
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} elseif ( \is_singular() ) {
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$json_template = \dirname( __FILE__ ) . '/../templates/post-json.php';
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} elseif ( \is_home() ) {
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$json_template = \dirname( __FILE__ ) . '/../templates/blog-json.php';
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}
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global $wp_query;
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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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if ( ! isset( $_SERVER['HTTP_ACCEPT'] ) ) {
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return $template;
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}
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$accept_header = $_SERVER['HTTP_ACCEPT'];
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if (
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\stristr( $accept_header, 'application/activity+json' ) ||
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\stristr( $accept_header, 'application/ld+json' )
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) {
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return $json_template;
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}
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// Accept header as an array.
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$accept = \explode( ',', \trim( $accept_header ) );
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if (
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\in_array( 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"', $accept, true ) ||
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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 $json_template;
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}
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return $template;
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}
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/**
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* Add the 'activitypub' query variable so WordPress 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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$vars[] = 'ap_comment_id';//comment_id doesn't work, 'c' is probably too short and prone to collisions
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//Collections review
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$vars[] = 'replies';
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$vars[] = 'collection_page';
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$vars[] = 'only_other_accounts';
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return $vars;
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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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* Schedule Activities.
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*
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* @param string $new_status New post status.
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* @param string $old_status Old post status.
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* @param WP_Post $post Post object.
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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( $post ) ) {
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return;
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}
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// Check if post-type supports ActivityPub.
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$post_types = \get_post_types_by_support( 'activitypub' );
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if ( ! \in_array( $post->post_type, $post_types, true ) ) {
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return;
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}
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$activitypub_post = new \Activitypub\Model\Post( $post );
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if ( 'publish' === $new_status && 'publish' !== $old_status ) {
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\wp_schedule_single_event( \time(), 'activitypub_send_post_activity', array( $activitypub_post ) );
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} elseif ( 'publish' === $new_status ) { //this triggers when restored post from trash, which may not be desired
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\wp_schedule_single_event( \time(), 'activitypub_send_update_activity', array( $activitypub_post ) );
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} elseif ( 'trash' === $new_status ) {
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\wp_schedule_single_event( \time(), 'activitypub_send_delete_activity', array( $activitypub_post ) );
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}
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}
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/**
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* preprocess local comments for federated replies
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*/
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public static function preprocess_comment( $commentdata ) {
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// only process replies from local actors
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if ( ! empty( $commentdata['user_id'] ) ) {
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$commentdata['comment_type'] = 'activitypub';
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// transform webfinger mentions to links and add @mentions to cc
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$tagged_content = \Activitypub\transform_tags( $commentdata['comment_content'] );
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$commentdata['comment_content'] = $tagged_content['content'];
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$commentdata['comment_meta']['mentions'] = $tagged_content['mentions'];
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}
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return $commentdata;
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}
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/**
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* comment_post()
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* postprocess_comment for federating replies and inbox-forwarding
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*/
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public static function postprocess_comment( $comment_id, $comment_approved, $commentdata ) {
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//Admin users comments bypass transition_comment_status (auto approved)
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$user = \get_userdata( $commentdata['user_id'] );
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if ( 'activitypub' === $commentdata['comment_type'] ) {
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if (
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( 1 === $comment_approved ) &&
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! empty( $commentdata['user_id'] ) &&
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\in_array( 'administrator', $user->roles )
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) {
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// Only for Admins
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$mentions = \get_comment_meta( $comment_id, 'mentions', true );
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\wp_schedule_single_event( \time(), 'activitypub_send_comment_activity', array( $comment_id ) );
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}
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}
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}
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/**
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* edit_comment()
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*
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* Fires immediately after a comment is updated in the database.
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* Fires immediately before comment status transition hooks are fired. (useful only for admin)
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*/
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public static function edit_comment( $comment_id, $data ) {
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if ( ! is_null( $data['user_id'] ) ) {
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\wp_schedule_single_event( \time(), 'activitypub_send_update_comment_activity', array( $comment_id ) );
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}
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}
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/**
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* Schedule Activities
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*
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* transition_comment_status()
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* @param int $comment
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*/
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public static function schedule_comment_activity( $new_status, $old_status, $activitypub_comment ) {
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if ( 'approved' === $new_status && 'approved' !== $old_status ) {
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//should only federate replies from local actors
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//should only federate replies to federated actors
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$ap_object = unserialize( \get_comment_meta( $activitypub_comment->comment_ID, 'ap_object', true ) );
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if ( empty( $ap_object ) ) {
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\wp_schedule_single_event( \time(), 'activitypub_send_comment_activity', array( $activitypub_comment->comment_ID ) );
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} else {
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$local_user = \get_author_posts_url( $ap_object['user_id'] );
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if ( ! is_null( $local_user ) ) {
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if ( in_array( $local_user, $ap_object['to'] )
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|| in_array( $local_user, $ap_object['cc'] )
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|| in_array( $local_user, $ap_object['audience'] )
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|| in_array( $local_user, $ap_object['tag'] )
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) {
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//if inReplyTo, object, target and/or tag are (local-wp) objects
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\wp_schedule_single_event( \time(), 'activitypub_inbox_forward_activity', array( $activitypub_comment->comment_ID ) );
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}
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}
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}
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} elseif ( 'trash' === $new_status ) {
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\wp_schedule_single_event( \time(), 'activitypub_send_delete_comment_activity', array( $activitypub_comment ) );
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} elseif ( $old_status === $new_status ) {
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//TODO Test with non-admin user
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\wp_schedule_single_event( \time(), 'activitypub_send_update_comment_activity', array( $activitypub_comment->comment_ID ) );
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}
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}
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/**
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* get_comment_text( $comment )
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*
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* Filters the comment content before it is updated in the database.
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*/
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public static function comment_append_edit_datetime( $comment_text, $comment, $args ) {
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if ( 'activitypub' === $comment->comment_type ) {
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$updated = \wp_date( 'Y-m-d H:i:s', \strtotime( \get_comment_meta( $comment->comment_ID, 'ap_last_modified', true ) ) );
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if ( $updated ) {
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$append_updated = "<div>(Last edited on <time class='modified' datetime='{$updated}'>$updated</time>)</div>";
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$comment_text .= $append_updated;
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}
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}
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return $comment_text;
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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 $args;
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}
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$allowed_comment_types = \apply_filters( 'get_avatar_comment_types', array( 'comment', 'activitypub' ) );
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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, $id_or_email );
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}
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// Check if comment has an avatar.
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$avatar = self::get_avatar_url( $id_or_email->comment_ID );
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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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return $args;
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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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* @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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