public function register_routes() {
		register_rest_route(
			$this->namespace,
			'/' . $this->rest_base,
			array(
				array(
					'methods'             => WP_REST_Server::READABLE,
					'callback'            => array( $this, 'get_items' ),
					'permission_callback' => array( $this, 'get_items_permissions_check' ),
					'args'                => $this->get_collection_params(),
				),
				array(
					'methods'             => WP_REST_Server::CREATABLE,
					'callback'            => array( $this, 'create_item' ),
					'permission_callback' => array( $this, 'create_item_permissions_check' ),
					'args'                => $this->get_endpoint_args_for_item_schema( WP_REST_Server::CREATABLE ),
				),
				'schema' => array( $this, 'get_item_schema' ),
			)
		);

		$activity_endpoint = '/' . $this->rest_base . '/(?P<id>[\d]+)';

		register_rest_route(
			$this->namespace,
			$activity_endpoint,
			array(
				'args'   => array(
					'id' => array(
						'description' => __( 'A unique numeric ID for the activity.', 'buddypress' ),
						'type'        => 'integer',
					),
				),
				array(
					'methods'             => WP_REST_Server::READABLE,
					'callback'            => array( $this, 'get_item' ),
					'permission_callback' => array( $this, 'get_item_permissions_check' ),
					'args'                => array(
						'context' => $this->get_context_param(
							array(
								'default' => 'view',
							)
						),
					),
				),
				array(
					'methods'             => WP_REST_Server::EDITABLE,
					'callback'            => array( $this, 'update_item' ),
					'permission_callback' => array( $this, 'update_item_permissions_check' ),
					'args'                => $this->get_endpoint_args_for_item_schema( WP_REST_Server::EDITABLE ),
				),
				array(
					'methods'             => WP_REST_Server::DELETABLE,
					'callback'            => array( $this, 'delete_item' ),
					'permission_callback' => array( $this, 'delete_item_permissions_check' ),
				),
				'schema' => array( $this, 'get_item_schema' ),
			)
		);

		// Register the favorite route.
		register_rest_route(
			$this->namespace,
			$activity_endpoint . '/favorite',
			array(
				'args'   => array(
					'id' => array(
						'description' => __( 'A unique numeric ID for the activity.', 'buddypress' ),
						'type'        => 'integer',
					),
				),
				array(
					'methods'             => WP_REST_Server::EDITABLE,
					'callback'            => array( $this, 'update_favorite' ),
					'permission_callback' => array( $this, 'update_favorite_permissions_check' ),
				),
				'schema' => array( $this, 'get_item_schema' ),
			)
		);
	}