Outbox Collection/Scheduler

includes/class-activitypub.php

@@ -4,6 +4,7 @@
 use Exception;
 use Activitypub\Signature;
 use Activitypub\Collection\Users;
+use Activitypub\Collection\Outbox;
 use Activitypub\Collection\Followers;
 
 use function Activitypub\sanitize_url;
@@ -384,11 +385,12 @@ public static function plugin_update_message( $data ) {
 	}
 
 	/**
-	 * Register the "Followers" Taxonomy
+	 * Register Custom Post Types
 	 *
 	 * @return void
 	 */
 	private static function register_post_types() {
+		// register Followers Post-Type
 		register_post_type(
 			Followers::POST_TYPE,
 			array(
@@ -457,6 +459,24 @@ private static function register_post_types() {
 		);
 
 		do_action( 'activitypub_after_register_post_type' );
+
+		// register Outbox Post-Type
+		register_post_type(
+			Outbox::POST_TYPE,
+			array(
+				'labels'           => array(
+					'name'          => _x( 'Outbox', 'post_type plural name', 'activitypub' ),
+					'singular_name' => _x( 'Outbox Item', 'post_type single name', 'activitypub' ),
+				),
+				'public'           => false,
+				'hierarchical'     => false,
+				'rewrite'          => false,
+				'query_var'        => false,
+				'delete_with_user' => false,
+				'can_export'       => true,
+				'supports'         => array(),
+			)
+		);
 	}
 
 	/**

includes/class-handler.php

@@ -15,13 +15,15 @@ class Handler {
 	 * Initialize the class, registering WordPress hooks
 	 */
 	public static function init() {
-		self::register_handlers();
+		self::register_inbox_handlers();
+
+		\add_action( 'transition_post_status', array( self::class, 'schedule_post_activity' ), 33, 3 );
 	}
 
 	/**
 	 * Register handlers.
 	 */
-	public static function register_handlers() {
+	public static function register_inbox_handlers() {
 		Create::init();
 		Delete::init();
 		Follow::init();
@@ -30,4 +32,53 @@ public static function register_handlers() {
 
 		do_action( 'activitypub_register_handlers' );
 	}
+
+	/**
+	 * Schedule Activities.
+	 *
+	 * @param string  $new_status New post status.
+	 * @param string  $old_status Old post status.
+	 * @param WP_Post $post       Post object.
+	 */
+	public static function schedule_post_activity( $new_status, $old_status, $post ) {
+		// Do not send activities if post is password protected.
+		if ( \post_password_required( $post ) ) {
+			return;
+		}
+
+		// Check if post-type supports ActivityPub.
+		$post_types = \get_post_types_by_support( 'activitypub' );
+		if ( ! \in_array( $post->post_type, $post_types, true ) ) {
+			return;
+		}
+
+		$type = false;
+
+		if ( 'publish' === $new_status && 'publish' !== $old_status ) {
+			$type = 'Create';
+		} elseif ( 'publish' === $new_status ) {
+			$type = 'Update';
+		} elseif ( 'trash' === $new_status ) {
+			$type = 'Delete';
+		}
+
+		if ( ! $type ) {
+			return;
+		}
+
+		\wp_schedule_single_event(
+			\time(),
+			'activitypub_send_activity',
+			array( $post, $type )
+		);
+
+		\wp_schedule_single_event(
+			\time(),
+			sprintf(
+				'activitypub_send_%s_activity',
+				\strtolower( $type )
+			),
+			array( $post )
+		);
+	}
 }

includes/class-scheduler.php

@@ -104,7 +104,6 @@ public static function deregister_schedules() {
 		wp_unschedule_hook( 'activitypub_cleanup_followers' );
 	}
 
-
 	/**
 	 * Schedule Activities.
 	 *

includes/collection/class-outbox.php

@@ -0,0 +1,9 @@
+<?php
+namespace Activitypub\Collection;
+
+/**
+ * ActivityPub Outbox Collection
+ */
+class Outbox {
+	const POST_TYPE = 'ap_outbox';
+}

includes/handler/class-update.php

@@ -20,8 +20,8 @@ public static function init() {
 	/**
 	 * Handle "Update" requests
 	 *
-	 * @param array                $array   The activity-object
-	 * @param int                  $user_id The id of the local blog-user
+	 * @param array $array   The activity-object
+	 * @param int   $user_id The id of the local blog-user
 	 */
 	public static function handle_update( $array, $user_id ) {
 		$object_type = isset( $array['object']['type'] ) ? $array['object']['type'] : '';

includes/transformer/class-post.php

@@ -6,6 +6,7 @@
 use Activitypub\Model\Blog_User;
 use Activitypub\Transformer\Base;
 use Activitypub\Collection\Users;
+use Activitypub\Activity\Activity;
 use Activitypub\Activity\Base_Object;
 
 use function Activitypub\esc_hashtag;
@@ -82,6 +83,23 @@ public function to_object() {
 		return $object;
 	}
 
+	/**
+	 * Transforms the ActivityPub Object to an Activity
+	 *
+	 * @param string $type The Activity-Type.
+	 *
+	 * @return \Activitypub\Activity\Activity The Activity.
+	 */
+	public function to_activity( $type ) {
+		$object = $this->to_object();
+
+		$activity = new Activity();
+		$activity->set_type( $type );
+		$activity->set_object( $object );
+
+		return $activity;
+	}
+
 	/**
 	 * Returns the ID of the Post.
 	 *