protected function set_merge_data( $code ) {

		$order = $this->post;

		switch ( $code ) {

			case '{{CUSTOMER_NAME}}':
				$code = $order->get_customer_name();
				break;

			case '{{ORDER_ID}}':
				$code = $order->get( 'id' );
				break;

			case '{{PLAN_TITLE}}':
				$code = $order->get( 'plan_title' );
				break;

			case '{{PRODUCT_TITLE}}':
				$code = $order->get( 'product_title' );
				break;

			case '{{PRODUCT_TITLE_LINK}}':
				$permalink = esc_url( get_permalink( $order->get( 'product_id' ) ) );
				if ( $permalink ) {
					$title = $this->set_merge_data( '{{PRODUCT_TITLE}}' );
					$code  = '<a href="' . $permalink . '">' . $title . '</a>';
				}
				break;

			case '{{PRODUCT_TYPE}}':
				$obj = $order->get_product();
				if ( empty( $obj ) ) {
					$code = __( '[DELETED ITEM]', 'lifterlms' );
				} elseif ( is_a( $obj, 'WP_Post' ) ) {
					$code = _x( 'Item', 'generic product type description', 'lifterlms' );
				} else {
					$code = $obj->get_post_type_label( 'singular_name' );
				}

				break;

		}

		return $code;

	}