AyeCode / invoicing

		$schema = $this->get_item_schema();

		// Invoice owner.

		if ( ! empty( $schema['properties']['user_id'] ) && isset( $request['user_id'] ) ) {

			$prepared_invoice->user_id = (int) $request['user_id'];

		}

		// Cart details.

		if ( ! empty( $schema['properties']['cart_details'] ) && isset( $request['cart_details'] ) ) {

		}

		// Cart details.

		if ( ! empty( $schema['properties']['cart_details'] ) && isset( $request['cart_details'] ) ) {

			$prepared_invoice->cart_details = (array) $request['cart_details'];

		}

		// Invoice status.

		if ( ! empty( $schema['properties']['status'] ) && isset( $request['status'] ) ) {

		}

		// IP

		if ( ! empty( $schema['properties']['ip'] ) && isset( $request['ip'] ) ) {

			$prepared_invoice->ip = $request['ip'];

		}

		// Payment details

		$prepared_invoice->payment_details = array();