133 lines
4.5 KiB
PHP
133 lines
4.5 KiB
PHP
<?php
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namespace deliver;
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require_once plugin_dir_path( __FILE__ ) . 'activities.php';
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// TODO look at inReplyTo, object, target, and tag objects
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// and deliver to their audience as well. Recurse through these
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// objects up to some limit
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function deliver_activity( $activity ) {
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$recipients = array();
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foreach ( array( 'to', 'bto', 'cc', 'bcc', 'audience' ) as $field ) {
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$recipients = array_merge(
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$recipients, retrieve_recipients_for_field( $field, $activity )
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);
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}
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$recipients = array_unique( $recipients );
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if ( array_key_exists( 'actor', $activity ) ) {
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$recipients = remove_actor_inbox_from_recipients( $activity['actor'], $recipients );
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}
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$activity = \activities\strip_private_fields( $activity );
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post_activity_to_inboxes( $activity, $recipients );
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}
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function remove_actor_inbox_from_recipients( $actor, $recipients ) {
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if ( array_key_exists( 'inbox', $actor ) ) {
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$key = array_search( $actor['inbox'], $recipients );
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if ( $key ) {
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unset( $recipients[$key] );
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}
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}
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return $recipients;
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}
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function retrieve_recipients_for_field( $field, $activity ) {
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if ( array_key_exists( $field, $activity ) ) {
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$to_value = $activity[$field];
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return get_recipient_urls( $to_value, 0, array() );
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}
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return array();
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}
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/*
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$object is either an Actor, a Link, a Collection/OrderedCollection,
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a single object id (url), or an array of object ids. If it's a url, it
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should dereference to one of the above types
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*/
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function get_recipient_urls( $object, $depth, $acc ) {
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if ( $depth === 30 ) {
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return $acc;
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}
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if ( array_key_exists( 'type', $object ) ) {
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// It's an Actor, Link, or Collection
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switch ( $object['type'] ) {
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case Collection:
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case OrderedCollection:
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$items = array();
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if ( array_key_exists( 'items', $object ) ) {
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$items = $object['items'];
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} else if ( array_key_exists( 'orderedItems', $object ) ) {
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$items = $object['orderedItems'];
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}
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$recipients = $acc;
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foreach ( $items as $item ) {
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$recipients = array_merge(
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$recipients,
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get_recipient_urls( $item, $depth + 1, array_merge( $recipients, $acc ) )
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);
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}
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return $recipients;
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case Link:
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if ( array_key_exists( 'href', $object ) ) {
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$response = wp_remote_get( $object['href'] );
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if ( is_wp_error( $response ) ) {
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return array();
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}
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$link_target = wp_remote_retrieve_body( $response );
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if ( empty( $link_target ) ) {
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return array();
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}
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return get_recipient_urls( json_decode( $link_target, true ), $depth + 1, $acc );
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} else {
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return array();
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}
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default:
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// An Actor
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if ( array_key_exists( 'inbox', $object ) ) {
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return array( $object['inbox'] );
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} else {
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return array();
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}
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}
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} else {
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// Assume it's an array of object ids (urls) or a single url
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if ( is_array( $object ) ) {
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$recipients = $acc;
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foreach( $object as $url ) {
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$recipients = array_merge(
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$recipients,
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get_recipient_urls( $url, $depth + 1, array_merge( $recipients, $acc ) )
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);
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}
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return $recipients;
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} else {
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if ( filter_var( $object, FILTER_VALIDATE_URL ) ) {
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$response = wp_remote_get( $object );
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if ( is_wp_error( $response ) ) {
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return array();
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}
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$response_body = wp_remote_retrieve_body( $response );
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if ( empty( $response_body ) ) {
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return $array();
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}
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return get_recipient_urls( json_decode( $response_body, true ), $depth + 1, $acc );
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} else {
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return array();
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}
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}
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}
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}
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function post_activity_to_inboxes( $activity, $recipients ) {
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foreach ( $inbox as $recipients ) {
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$args = array(
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'body' => $activity,
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'headers' => array( 'Content-Type' => 'application/ld+json' )
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);
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// TODO do something with the result?
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wp_remote_post( $inbox, $args );
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}
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}
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?>
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