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

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

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

    use WC_Braintree_Controller_Cart_Trait;

    public function register_routes() {
        register_rest_route(
            $this->rest_uri(),
            'cart',
            array(
                'methods'             => WP_REST_Server::CREATABLE,
                'callback'            => array( $this, 'add_to_cart' ),
                'permission_callback' => '__return_true',
                'args'                => array(
                    'product_id'     => array(
                        'type'     => 'number',
                        'required' => true,
                    ),
                    'payment_method' => array( 'required' => true ),
                    'qty'            => array( 'required' => true ),
                ),
            )
        );
        register_rest_route(
            $this->rest_uri(),
            'cart/shipping-method',
            array(
                'methods'             => WP_REST_Server::CREATABLE,
                'callback'            => array( $this, 'update_shipping_method' ),
                'permission_callback' => '__return_true',
                'args'                => array(
                    'shipping_method' => array( 'required' => true ),
                    'payment_method'  => array( 'required' => true ),
                ),
            )
        );
        register_rest_route(
            $this->rest_uri(),
            'cart/shipping-address',
            array(
                'methods'             => WP_REST_Server::CREATABLE,
                'callback'            => array( $this, 'update_shipping_address' ),
                'permission_callback' => '__return_true',
                'args'                => array(
                    'payment_method' => array( 'required' => true ),
                    'address'        => array( 'validate_callback' => array( $this, 'validate_address' ) )
                ),
            )
        );
        register_rest_route(
            $this->rest_uri(),
            'cart/shipping',
            array(
                'methods'             => WP_REST_Server::CREATABLE,
                'callback'            => array( $this, 'update_shipping' ),
                'permission_callback' => '__return_true',
                'args'                => array(
                    'address'         => array( 'validate_callback' => array( $this, 'validate_address' ) ),
                    'payment_method'  => array( 'required' => true ),
                    'shipping_method' => array( 'required' => true ),
                ),
            )
        );
    }

    /**
     *
     * @param WP_REST_Request $request
     */
    public function add_to_cart( $request ) {
        wc_maybe_define_constant( 'WOOCOMMERCE_CART', true );
        $payment_method = $request->get_param( 'payment_method' );
        /**
         *
         * @var WC_Braintree_Payment_Gateway $gateway
         */
        $gateway = WC()->payment_gateways()->payment_gateways()[ $payment_method ];

        list( $product_id, $qty, $variation_id, $variation ) = $this->get_add_to_cart_args( $request );

        // Remove this item from cart before adding it again to keep quantities on product page accurate.
        WC()->cart->remove_cart_item( WC()->cart->generate_cart_id( $product_id, $variation_id, $variation ) );

        if ( WC()->cart->add_to_cart( $product_id, $qty, $variation_id, $variation ) == false ) {
            return rest_ensure_response(
                array(
                    'success'  => false,
                    'messages' => $this->get_error_messages(),
                )
            );
        } else {
            return rest_ensure_response( array(
                    'success' => true,
                    'data'    => $gateway->add_to_cart_response( array(
                        'total'          => WC()->cart->total,
                        'needs_shipping' => WC()->cart->needs_shipping()
                    ) ),
                )
            );
        }
    }

    /**
     * Add the selected shipping method to the WC session
     *
     * @param WP_REST_Request $request
     *
     * @return WP_REST_Response
     */
    public function update_shipping_method( $request ) {
        wc_maybe_define_constant( 'WOOCOMMERCE_CART', true );

        $payment_method = $request->get_param( 'payment_method' );
        /**
         *
         * @var WC_Braintree_Payment_Gateway $gateway
         */
        $gateway = WC()->payment_gateways()->payment_gateways()[ $payment_method ];
        // using the chosen shipping methods, add it to the session so it can be used during order creation.
        $chosen_shipping_methods = WC()->session->get( 'chosen_shipping_methods', array() );
        try {
            $shipping_method = $this->get_shipping_method_from_request( $request );
            if ( $shipping_method ) {
                $chosen_shipping_methods[ $shipping_method['index'] ] = $shipping_method['id'];
            }
            /**
             * Hack that keeps WCS shipping methods in sync with non-shippable products
             */
            if ( $gateway->cart_contains_trial_period_subscription() ) {
                foreach ( $chosen_shipping_methods as $n => $method ) {
                    if ( strlen( $n ) > 1 && ( substr( $n, - 1 ) == $shipping_method['index'] ) ) {
                        $chosen_shipping_methods[ $n ] = $shipping_method['id'];
                    }
                }
            }

            WC()->session->set( 'chosen_shipping_methods', $chosen_shipping_methods );

            $this->add_ready_to_calc_shipping();

            WC()->cart->calculate_totals();

            return rest_ensure_response(
                apply_filters(
                    'wc_braintree_update_shipping_method_response',
                    array(
                        'data' => $gateway->update_shipping_method_response( array(
                            'chosen_shipping_methods' => $chosen_shipping_methods,
                            'total'                   => WC()->cart->total
                        ) ),
                    ),
                    $payment_method,
                    $request
                )
            );
        } catch ( Exception $e ) {
            return apply_filters( 'wc_braintree_update_shipping_method_error', new WP_Error( 'shipping-address', $e->getMessage(), array( 'status' => 200 ) ), $payment_method, $request );
        }
    }

    /**
     * Update the customer's shipping address.
     *
     * @param WP_REST_Request $request
     *
     * @return WP_REST_Response
     */
    public function update_shipping_address( $request ) {
        wc_maybe_define_constant( 'WOOCOMMERCE_CART', true );

        $payment_method = $request->get_param( 'payment_method' );
        /**
         *
         * @var WC_Braintree_Payment_Gateway $gateway
         */
        $gateway = WC()->payment_gateways()->payment_gateways()[ $payment_method ];
        // update the shipping address so the list of shipping methods available can be sent back.
        $address = $request->get_param( 'address' );

        try {
            wc_braintree_update_customer_location( $address );

            $this->add_ready_to_calc_shipping();

            // re-calculate cart totals which includes shipping
            WC()->cart->calculate_totals();
            $packages = $gateway->get_shipping_packages();
            // if the rates are empty then this shipping address is not supported.
            if ( ! $this->has_shipping_methods( $packages ) ) {
                throw new Exception( __( 'No shipping methods available for address.', 'woo-payment-gateway' ) );
            }

            return rest_ensure_response(
                apply_filters(
                    'wc_braintree_update_address_response',
                    array(
                        'data' => $gateway->update_shipping_address_response(
                            array(
                                'chosen_shipping_methods' => WC()->session->get( 'chosen_shipping_methods', array() ),
                                'address'                 => $address,
                                'total'                   => WC()->cart->total
                            )
                        ),
                    ),
                    $payment_method,
                    $request
                )
            );
        } catch ( Exception $e ) {
            return apply_filters( 'wc_braintree_update_address_error', new WP_Error( 'shipping-address', $e->getMessage(), array( 'status' => 200 ) ), $payment_method, $request );
        }
    }

    /**
     * Update the shipping address and shipping method.
     *
     * @param WP_REST_Request $request
     *
     * @since 3.1.11
     */
    public function update_shipping( $request ) {
        wc_maybe_define_constant( 'WOOCOMMERCE_CART', true );
        /**
         *
         * @var WC_Braintree_Payment_Gateway $payment_method
         */
        $payment_method = WC()->payment_gateways()->payment_gateways()[ $request->get_param( 'payment_method' ) ];

        try {
            // update the customer's address
            wc_braintree_update_customer_location( $request->get_param( 'address' ) );

            if ( ( $shipping_method = $this->get_shipping_method_from_request( $request ) ) ) {

                $chosen_shipping_methods = WC()->session->get( 'chosen_shipping_methods', array() );

                $chosen_shipping_methods[ $shipping_method['index'] ] = $shipping_method['id'];

                // save the chosen shipping methods
                WC()->session->set( 'chosen_shipping_methods', $chosen_shipping_methods );
            }

            $this->add_ready_to_calc_shipping();

            // calculate totals
            WC()->cart->calculate_totals();

            $packages = $payment_method->get_shipping_packages();

            if ( empty( $packages ) ) {
                throw new Exception( __( 'No shipping methods for provided address', 'woo-payment-gateway' ) );
            }

            return rest_ensure_response(
                apply_filters(
                    'wc_braintree_update_shipping_response',
                    array(
                        'data' => $payment_method->update_shipping_response( array(
                            'chosen_shipping_methods' => WC()->session->get( 'chosen_shipping_methods', array() ),
                            'total'                   => WC()->cart->total
                        ), $request ),
                    )
                )
            );
        } catch ( Exception $e ) {
            return new WP_Error( 'shipping-error', $e->getMessage(), $payment_method->update_shipping_error( $e, array( 'status' => 200 ) ) );
        }
    }

    /**
     *
     * @param array $address
     * @param WP_REST_Request $request
     *
     * @return bool
     */
    public function validate_address( $address, $request ) {
        /**
         * @var WC_Braintree_Payment_Gateway $payment_method
         */
        $payment_method = WC()->payment_gateways()->payment_gateways()[ $request['payment_method'] ];
        if ( isset( $address['state'], $address['country'] ) ) {
            $address['state']   = $payment_method->filter_address_state( $address['state'], $address['country'] );
            $request['address'] = $address;
        }
        $result = true;
        if ( method_exists( $payment_method, 'validate_wallet_address' ) ) {
            $result = $payment_method->validate_wallet_address( $address );
        }

        return apply_filters( 'wc_braintree_cart_controller_validate_address', $result, $address, $request );
    }

    /**
     * Return true if the provided packages have shipping methods.
     *
     * @param array $packages
     *
     * @return bool
     */
    private function has_shipping_methods( $packages ) {
        foreach ( $packages as $i => $package ) {
            if ( ! empty( $package['rates'] ) ) {
                return true;
            }
        }

        return false;
    }

    /**
     * @param WP_Rest_Request $request
     *
     * @return array
     * @throws Exception
     * @since 3.2.4
     */
    private function get_shipping_method_from_request( $request ) {
        if ( ( $method = $request->get_param( 'shipping_method' ) ) ) {
            if ( ! preg_match( '/^(?P<index>[\w]+)\:(?P<id>.+)$/', $method, $shipping_method ) ) {
                throw new Exception( __( 'Invalid shipping method format. Expected: index:id', 'woo-payment-gateway' ) );
            }

            return $shipping_method;
        }

        return false;
    }

    /**
     * @param WP_REST_Request $request
     *
     * @since 3.2.17
     * return array
     */
    private function get_add_to_cart_args( $request ) {
        $args = array(
            'product_id'   => $request->get_param( 'product_id' ),
            'qty'          => $request->get_param( 'qty' ),
            'variation_id' => $request->get_param( 'variation_id' ) == null ? 0 : $request->get_param( 'variation_id' ),
            'variation'    => $request->get_param( 'variation' )
        );
        if ( ! $args['variation'] ) {
            $args['variation'] = array();
        }

        return array_values( $args );
    }
}

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