File api/class-wc-braintree-controller-checkout.php

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

/**
 *
 * @since 3.0.0
 * @package Braintree/API
 *
 */
class WC_Braintree_Controller_Checkout extends WC_Braintree_Controller_Frontend {

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

    public function register_routes() {
        register_rest_route(
            $this->rest_uri(),
            'checkout',
            array(
                'methods'             => WP_REST_Server::CREATABLE,
                'callback'            => array( $this, 'process_checkout' ),
                'permission_callback' => '__return_true',
                'args'                => array(
                    'payment_method' => array(
                        'required'          => true,
                        'validate_callback' => array(
                            $this,
                            'validate_payment_method',
                        ),
                    ),
                ),
            )
        );
    }

    /**
     *
     * @param WP_REST_Request $request
     */
    public function process_checkout( $request ) {
        $this->actions();
        $checkout       = WC()->checkout();
        $payment_method = $request->get_param( 'payment_method' );
        $this->gateway  = $gateway = WC()->payment_gateways()->payment_gateways()[ $payment_method ];
        WC()->session->set(
            $payment_method . '_tokenized_response',
            json_decode(
                stripslashes(
                    $request->get_param(
                        $payment_method .
                        '_tokenized_response'
                    )
                ),
                true
            )
        );
        $this->required_post_data();
        try {
            do_action( 'wc_braintree_rest_process_checkout', $request, $gateway );
            if ( ! is_user_logged_in() ) {
                $this->create_customer( $request );
            }
            // set the checkout nonce so no exceptions are thrown.
            $_REQUEST['_wpnonce'] = $_POST['_wpnonce'] = wp_create_nonce( 'woocommerce-process_checkout' );

            if ( 'product' == $request->get_param( 'page_id' ) ) {
                $product_option                   = new WC_Braintree_Product_Gateway_Option( current( WC()->cart->get_cart() )['data'], $gateway );
                $gateway->settings['charge_type'] = $product_option->get_option( 'charge_type' );
            }
            $checkout->process_checkout();
        } catch ( Exception $e ) {
            wc_add_notice( $e->getMessage(), 'error' );
        }
        if ( wc_notice_count( 'error' ) > 0 ) {
            return $this->send_response( false );
        }

        return $this->send_response( true );
    }

    /**
     *
     * @param WP_REST_Request $request
     */
    private function create_customer( $request ) {
        $create = WC()->checkout()->is_registration_required();
        // create an account for the user if it's required for things like subscriptions.
        if ( wc_braintree_subscriptions_active() && wcs_braintree_cart_contains_subscription() ) {
            $create = true;
        }
        if ( wcs_braintree_active() && WC_Subscriptions_Cart::cart_contains_subscription() ) {
            $create = true;
        }
        if ( $create ) {
            $password = wp_generate_password();
            $username = $email = $request->get_param( 'billing_email' );
            $result   = wc_create_new_customer( $email, $username, $password );
            if ( $result instanceof WP_Error ) {
                // for email exists errors you want customer to either login or use a different email address.
                if ( $result->get_error_code() === 'registration-error-email-exists' ) {
                    wc_braintree_set_checkout_error();
                }
                throw new Exception( $result->get_error_message() );
            }
            $this->customer_id = $result;

            // log the customer in
            wp_set_current_user( $this->customer_id );
            wc_set_customer_auth_cookie( $this->customer_id );

            // As we are now logged in, cart will need to refresh to receive updated nonces
            WC()->session->set( 'reload_checkout', true );
        }
    }

    private function send_response( $success ) {
        $reload = WC()->session->get( 'reload_checkout', false );
        $data   = array(
            'result'   => $success ? 'success' : 'failure',
            'messages' => $reload ? null : $this->get_error_messages(),
            'reload'   => $reload,
        );
        unset( WC()->session->reload_checkout );

        return rest_ensure_response( $data );
    }

    public function validate_payment_method( $payment_method ) {
        $gateways = WC()->payment_gateways()->payment_gateways();

        return isset( $gateways[ $payment_method ] ) ? true : new WP_Error( 'validation-error', 'Please choose a valid payment method.' );
    }

    private function get_order_review_url() {
        return add_query_arg(
            array(
                '_braintree_order_review' => rawurlencode( base64_encode( wp_json_encode( array(
                    'payment_method' => $this->gateway->id,
                    'payment_nonce'  => $this->gateway->get_payment_method_nonce(),
                ) ) ) )
            ),
            wc_get_checkout_url()
        );
    }

    private function actions() {
        add_filter( 'woocommerce_checkout_posted_data', array( $this, 'get_posted_data' ) );
        add_action( 'woocommerce_after_checkout_validation', array( $this, 'after_checkout_validation' ), 10, 2 );
    }

    /**
     *
     * @param array $data
     * @param WP_Error $errors
     */
    public function after_checkout_validation( $data, $errors ) {
        if ( $errors->get_error_codes() ) {
            wc_braintree_log_info( sprintf( __CLASS__ . '::checkout errors: %s', print_r( $errors->get_error_codes(), true ) ) );
            wc_add_notice(
                apply_filters(
                    'wc_braintree_after_checkout_validation_notice', __( 'Please fill out all required fields then complete your order.', 'woo-payment-gateway' ),
                    $data, $errors
                ), 'notice'
            );
            wp_send_json(
                array(
                    'result'   => 'success',
                    'redirect' => $this->get_order_review_url(),
                    'reload'   => false,
                ),
                200
            );
        }
    }

    private function required_post_data() {
        if ( WC()->cart->needs_shipping() ) {
            $_POST['ship_to_different_address'] = true;
        }
        if ( wc_get_page_id( 'terms' ) > 0 ) {
            $_POST['terms'] = 1;
        }
    }

    public function get_posted_data( $data ) {
        if ( ! empty( $data['shipping_method'] ) && ! empty( $data['shipping_state'] ) && ! empty( 'shipping_country' ) ) {
            $data['shipping_state'] = $this->gateway->filter_address_state( $data['shipping_state'], $data['shipping_country'] );
        }

        return $data;
    }
}

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