<?php
/**
 * ActivityPub Transmogrify for the GatherPress event plugin.
 *
 * Handles converting incoming external ActivityPub events to GatherPress Events.
 *
 * @package Event_Bridge_For_ActivityPub
 * @since 1.0.0
 * @license AGPL-3.0-or-later
 */

namespace Event_Bridge_For_ActivityPub\Activitypub\Transmogrifier;

use Activitypub\Activity\Extended_Object\Event;
use Activitypub\Activity\Extended_Object\Place;

// Exit if accessed directly.
defined( 'ABSPATH' ) || exit; // @codeCoverageIgnore

use GatherPress\Core\Event as GatherPress_Event;

/**
 * ActivityPub Transmogrifier for the GatherPress event plugin.
 *
 * Handles converting incoming external ActivityPub events to GatherPress Events.
 *
 * @since 1.0.0
 */
class GatherPress {
	/**
	 * The current GatherPress Event object.
	 *
	 * @var Event
	 */
	protected $activitypub_event;

	/**
	 * Extend the constructor, to also set the GatherPress objects.
	 *
	 * This is a special class object form The Events Calendar which
	 * has a lot of useful functions, we make use of our getter functions.
	 *
	 * @param array $activitypub_event The ActivityPub Event as associative array.
	 */
	public function __construct( $activitypub_event ) {
		$activitypub_event = Event::init_from_array( $activitypub_event );

		if ( is_wp_error( $activitypub_event ) ) {
			return;
		}

		$this->activitypub_event = $activitypub_event;
	}

	/**
	 * Get post.
	 */
	private function get_post_id_from_activitypub_id() {
		global $wpdb;
		$id = $this->activitypub_event->get_id();
		return $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE guid=%s AND post_type=%s", $id, 'gatherpress_event' ) );
	}

	/**
	 * Save the ActivityPub event object as GatherPress Event.
	 */
	public function create() {
		// Insert new GatherPress Event post.
		$post_id = wp_insert_post(
			array(
				'post_title'   => $this->activitypub_event->get_name(),
				'post_type'    => 'gatherpress_event',
				'post_content' => $this->activitypub_event->get_content(),
				'post_excerpt' => $this->activitypub_event->get_summary(),
				'post_status'  => 'publish',
				'guid'         => $this->activitypub_event->get_id(),
			)
		);

		if ( ! $post_id || is_wp_error( $post_id ) ) {
			return;
		}

		$event  = new \GatherPress\Core\Event( $post_id );
		$params = array(
			'datetime_start' => $this->activitypub_event->get_start_time(),
			'datetime_end'   => $this->activitypub_event->get_end_time(),
			'timezone'       => $this->activitypub_event->get_timezone(),
		);
		$event->save_datetimes( $params );
	}

	/**
	 * Save the ActivityPub event object as GatherPress Event.
	 */
	public function update() {
		$post_id = $this->get_post_id_from_activitypub_id();

		// Insert new GatherPress Event post.
		$post_id = wp_update_post(
			array(
				'ID'           => $post_id,
				'post_title'   => $this->activitypub_event->get_name(),
				'post_type'    => 'gatherpress_event',
				'post_content' => $this->activitypub_event->get_content(),
				'post_excerpt' => $this->activitypub_event->get_summary(),
				'post_status'  => 'publish',
				'guid'         => $this->activitypub_event->get_id(),
			)
		);

		if ( ! $post_id || is_wp_error( $post_id ) ) {
			return;
		}

		$event  = new \GatherPress\Core\Event( $post_id );
		$params = array(
			'datetime_start' => $this->activitypub_event->get_start_time(),
			'datetime_end'   => $this->activitypub_event->get_end_time(),
			'timezone'       => $this->activitypub_event->get_timezone(),
		);
		$event->save_datetimes( $params );
	}
}