File controllers/class-wc-stripe-controller-googlepay.php

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<?php
defined( 'ABSPATH' ) || exit();

if ( ! class_exists( 'WC_Stripe_Rest_Controller' ) ) {
    return;
}

/**
 *
 * @author PaymentPlugins
 * @package Stripe/Controllers
 */
class WC_Stripe_Controller_GooglePay extends WC_Stripe_Rest_Controller {

    use WC_Stripe_Controller_Cart_Trait;
    use WC_Stripe_Controller_Frontend_Trait;

    protected $namespace = 'googlepay';

    /**
     *
     * @var WC_Payment_Gateway_Stripe_GooglePay
     */
    private $gateway;

    /**
     *
     * @var string
     */
    private $shipping_method_id;

    /**
     *
     * @var string
     */
    private $reason_code;

    public function register_routes() {
        register_rest_route(
            $this->rest_uri(),
            'shipping-data',
            array(
                'methods'             => WP_REST_Server::CREATABLE,
                'callback'            => array( $this, 'update_shipping_data' ),
                'permission_callback' => '__return_true',
                'args'                => array(
                    'address'         => array( 'required' => true, 'validate_callback' => array( $this, 'validate_shipping_address' ) ),
                    'shipping_method' => array( 'required' => false )
                ),
            )
        );
    }

    /**
     * Update the WC shipping data from the Google payment sheet.
     *
     * @param WP_REST_Request $request
     */
    public function update_shipping_data( $request ) {
        wc_maybe_define_constant( 'WOOCOMMERCE_CART', true );

        $address                  = $request->get_param( 'address' );
        $this->shipping_method_id = ( ( $method_id = $request->get_param( 'shipping_method' ) ) ? $method_id : 'default' );

        $this->gateway = WC()->payment_gateways()->payment_gateways()['stripe_googlepay'];

        $this->add_ready_to_calc_shipping();

        try {

            wc_stripe_update_customer_location( $address );

            wc_stripe_update_shipping_methods( $this->get_shipping_method_from_request( $request ) );

            if ( 'product' == $request->get_param( 'page_id' ) ) {
                wc_stripe_stash_cart( WC()->cart );
            }

            // update the WC cart with the new shipping options
            WC()->cart->calculate_totals();

            // if shipping address is not serviceable, throw an error.
            if ( ! wc_stripe_shipping_address_serviceable( $this->gateway->get_shipping_packages() ) ) {
                $this->reason_code = 'SHIPPING_ADDRESS_UNSERVICEABLE';
                throw new Exception( __( 'Your shipping address is not serviceable.', 'woo-stripe-payment' ) );
            }

            $response = rest_ensure_response(
                apply_filters(
                    'wc_stripe_googlepay_paymentdata_response',
                    array(
                        'data' => array(
                            'shipping_methods'     => $this->get_shipping_methods(),
                            'paymentRequestUpdate' => $this->get_payment_response_data(),
                            'address'              => $address
                        ),
                    )
                )
            );
            if ( 'product' == $request->get_param( 'page_id' ) ) {
                wc_stripe_restore_cart( WC()->cart );
            }

            return $response;
        } catch ( Exception $e ) {
            return new WP_Error(
                'payment-data-error',
                $e->getMessage(),
                array(
                    'status' => 200,
                    'data'   => array(
                        'error' => array(
                            'reason'  => $this->reason_code,
                            'message' => $e->getMessage(),
                            'intent'  => 'SHIPPING_ADDRESS',
                        ),
                    ),
                )
            );
        }
    }

    /**
     * Return a formatted array of response data required by the Google payment sheet.
     */
    public function get_payment_response_data() {
        $shipping_options = $this->gateway->get_formatted_shipping_methods();

        return array(
            'newTransactionInfo'          => array(
                'currencyCode'     => get_woocommerce_currency(),
                'countryCode'      => WC()->countries->get_base_country(),
                'totalPriceStatus' => 'FINAL',
                'totalPrice'       => wc_format_decimal( WC()->cart->total, 2 ),
                'displayItems'     => $this->gateway->get_display_items(),
                'totalPriceLabel'  => __( 'Total', 'woo-stripe-payment' ),
            ),
            'newShippingOptionParameters' => array(
                'shippingOptions'         => $shipping_options,
                'defaultSelectedOptionId' => $this->get_default_shipping_method( $shipping_options ),
            ),
        );
    }

    private function get_shipping_methods() {
        return WC()->session->get( 'chosen_shipping_methods', array() );
    }

    /**
     * Returns a default shipping method based on the chosen shipping methods.
     *
     * @param array $methods
     *
     * @return string
     */
    private function get_default_shipping_method( $methods ) {
        $chosen_shipping_methods = WC()->session->get( 'chosen_shipping_methods', array() );
        $method_ids              = wp_list_pluck( $methods, 'id' );
        foreach ( $chosen_shipping_methods as $idx => $method ) {
            $method_id = sprintf( '%s:%s', $idx, $method );
            if ( in_array( $method_id, $method_ids ) ) {
                $this->shipping_method_id = $method_id;
            }
        }
        if ( ! $this->shipping_method_id ) {
            $this->shipping_method_id = current( $method_ids );
        }

        return $this->shipping_method_id;
    }
}

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