BP_REST_Forums_Endpoint::get_forum_last_active_author_id( int $forum_id )

	public function get_forum_last_active_author_id( $forum_id ) {

		if ( empty( $forum_id ) ) {
			return 0;
		}

		$last_id = get_post_meta( $forum_id, '_bbp_last_active_id', true );
		if ( ! empty( $last_id ) ) {
			$post = get_post( $last_id );

			return ( ! empty( $post ) && ! empty( $post->post_author ) ) ? $post->post_author : 0;
		}

		return 0;
	}