Add support for The Events Calendar

integration/class-the-events-calendar.php

@@ -0,0 +1,139 @@
+<?php
+namespace Activitypub\Integration;
+
+use Activitypub\Activity\Extended_Object\Event;
+use Activitypub\Activity\Extended_Object\Place;
+use Activitypub\Transformer\Post;
+use function Activitypub\get_rest_url_by_path;
+
+/**
+ * Compatibility with the Tribe The Events Calendar plugin.
+ *
+ * This is a transformer for the Tribe The Events Calendar plugin,
+ * that extends the default transformer for WordPress posts.
+ *
+ * @see https://wordpress.org/plugins/the-events-calendar/
+ */
+class The_Events_Calendar extends Post {
+
+	/**
+	 * Base constructor.
+	 *
+	 * @param \WP_Post $wp_object The WordPress object
+	 */
+	public function __construct( $wp_object ) {
+		$this->wp_object = \tribe_get_event( $wp_object );
+	}
+
+	/**
+	 * Transforms the WP_Post event object to an ActivityPub Object
+	 *
+	 * @see \Activitypub\Activity\Base_Object
+	 *
+	 * @return \Activitypub\Activity\Base_Object The ActivityPub Object
+	 */
+	public function to_object() {
+		$event = $this->wp_object;
+		$event_tickets = null;
+		if ( ! empty( $event->tickets ) ) {
+			$event_tickets = $event->tickets;
+		}
+
+		$object = new Event();
+		$object = $this->transform_object_properties( $object );
+
+		$object->set_type( 'Event' );
+		$object->set_timezone( $event->timezone );
+
+		$end_date = \strtotime( $event->end_date );
+		$object->set_end_time( \gmdate( 'Y-m-d\TH:i:s\Z', $end_date ) );
+
+		$start_date = \strtotime( $event->start_date );
+		$object->set_start_time( \gmdate( 'Y-m-d\TH:i:s\Z', $start_date ) );
+
+		if ( 'canceled' === $event->event_status ) {
+			$object->set_status( 'CANCELLED' );
+		}
+
+		if ( 'open' === $event->comment_status ) {
+			$object->set_comments_enabled( true );
+		} else {
+			$object->set_comments_enabled( false );
+		}
+
+		$object->set_category( 'MEETING' );
+		$object->set_in_language( $this->get_locale() );
+		$object->set_join_mode( 'free' );
+		if ( $event_tickets ) {
+			$object->set_join_mode( 'restricted' );
+			$object->set_external_participation_url( $event_tickets['link']->anchor );
+		}
+
+		if ( ! empty( $event->venues ) && ! empty( $event->venues[0] ) ) {
+			$event_venue = $event->venues[0];
+			$address = [
+				'addressCountry' => $event_venue->country,
+				'addressLocality' => $event_venue->city,
+				'addressRegion' => $event_venue->province,
+				'postalCode' => $event_venue->zip,
+				'streetAddress' => $event_venue->address,
+				'type' => 'PostalAddress',
+			];
+			$location = new Place();
+			$location->set_address( $address );
+			$location->set_id( $event_venue->permalink );
+			$location->set_name( $event_venue->post_name );
+			$object->set_location( $location );
+		}
+
+		$object->set_is_online( false );
+		if ( class_exists( 'Tribe\Events\Virtual\Event_Meta' ) &&
+			$event->virtual_event_type &&
+			Tribe\Events\Virtual\Event_Meta::$value_virtual_event_type === $event->virtual_event_type
+		) {
+			$object->set_is_online( true );
+		}
+
+		if ( $event_tickets && function_exists( '\tribe_get_event_capacity' ) ) {
+			$object->set_anonymous_participation_enabled( false );
+			$object->set_maximum_attendee_capacity( \tribe_get_event_capacity( $event ) );
+			$object->set_participant_count( count( \tribe_tickets_get_attendees( $event->ID ) ) );
+			$object->set_remaining_attendee_capacity( \tribe_events_count_available_tickets( $event ) );
+		}
+
+		$published = \strtotime( $event->post_date_gmt );
+		$object->set_published( \gmdate( 'Y-m-d\TH:i:s\Z', $published ) );
+
+		$updated = \strtotime( $event->post_modified_gmt );
+		if ( $updated > $published ) {
+			$object->set_updated( \gmdate( 'Y-m-d\TH:i:s\Z', $updated ) );
+		}
+
+		$object->set_content_map(
+			array(
+				$this->get_locale() => $this->get_content(),
+			)
+		);
+		$path = sprintf( 'actors/%d/followers', intval( $event->post_author ) );
+
+		$object->set_to(
+			array(
+				'https://www.w3.org/ns/activitystreams#Public',
+				get_rest_url_by_path( $path ),
+			)
+		);
+
+		return $object;
+	}
+
+	/**
+	 * Returns the ActivityStreams 2.0 Object-Type Event
+	 *
+	 * @see https://www.w3.org/TR/activitystreams-vocabulary/#activity-types
+	 *
+	 * @return string The Object-Type.
+	 */
+	public function get_type() {
+		return 'Event';
+	}
+}

integration/load.php

@@ -87,6 +87,38 @@ function( $transformer, $object, $object_class ) {
 			3
 		);
 	}
+
+	/**
+	 * Adds Tribe The Events Calendar support.
+	 *
+	 * This class handles the compatibility with Tribe The Events Calendar.
+	 *
+	 * @see https://wordpress.org/plugins/the-events-calendar/
+	 */
+	if ( \defined( 'TRIBE_EVENTS_FILE' ) ) {
+		add_action(
+			'init',
+			function() {
+				\add_post_type_support( 'tribe_events', 'activitypub' );
+			}
+		);
+		add_filter(
+			'activitypub_transformer',
+			// phpcs:ignore Universal.NamingConventions.NoReservedKeywordParameterNames.objectFound
+			function( $transformer, $object, $object_class ) {
+				if (
+					'WP_Post' === $object_class &&
+					'tribe_events' === $object->post_type
+				) {
+					require_once __DIR__ . '/class-the-events-calendar.php';
+					return new The_Events_Calendar( $object );
+				}
+				return $transformer;
+			},
+			10,
+			3
+		);
+	}
 }
 \add_action( 'plugins_loaded', __NAMESPACE__ . '\plugin_init' );