invoiceninja/resources/js/clients/payments/braintree-paypal.js

/**
 * Invoice Ninja (https://invoiceninja.com).
 *
 * @link https://github.com/invoiceninja/invoiceninja source repository
 *
 * @copyright Copyright (c) 2021. Invoice Ninja LLC (https://invoiceninja.com)
 *
 * @license https://www.elastic.co/licensing/elastic-license 
 */

class BraintreePayPal {
    initBraintreeDataCollector() {
        window.braintree.client.create({
            authorization: document.querySelector('meta[name=client-token]').content
        }, function (err, clientInstance) {
            window.braintree.dataCollector.create({
                client: clientInstance,
                paypal: true
            }, function (err, dataCollectorInstance) {
                if (err) {
                    return;
                }

                document.querySelector('input[name=client-data]').value = dataCollectorInstance.deviceData;
            });
        });
    }

    static getPaymentDetails() {
        return {
            flow: 'vault',
        }
    }

    static handleErrorMessage(message) {
        let errorsContainer = document.getElementById('errors');

        errorsContainer.innerText = message;
        errorsContainer.hidden = false;
    }

    handlePaymentWithToken() {
        Array
            .from(document.getElementsByClassName('toggle-payment-with-token'))
            .forEach((element) => element.addEventListener('click', (element) => {
                document.getElementById('paypal-button').classList.add('hidden');
                document.getElementById('save-card--container').style.display = 'none';
                document.querySelector('input[name=token]').value = element.target.dataset.token;

                document.getElementById('pay-now-with-token').classList.remove('hidden');
                document.getElementById('pay-now').classList.add('hidden');
            }));

        let payNowWithToken = document.getElementById('pay-now-with-token');

        payNowWithToken
            .addEventListener('click', (element) => {
                payNowWithToken.disabled = true;
                payNowWithToken.querySelector('svg').classList.remove('hidden');
                payNowWithToken.querySelector('span').classList.add('hidden');

                document.getElementById('server-response').submit();
            });
    }

    handle() {
        this.initBraintreeDataCollector();
        this.handlePaymentWithToken();

        braintree.client.create({
            authorization: document.querySelector('meta[name=client-token]').content,
        }).then(function (clientInstance) {
            return braintree.paypalCheckout.create({
                client: clientInstance
            });
        }).then(function (paypalCheckoutInstance) {
            return paypalCheckoutInstance.loadPayPalSDK({
                vault: true
            }).then(function (paypalCheckoutInstance) {
                return paypal.Buttons({
                    fundingSource: paypal.FUNDING.PAYPAL,

                    createBillingAgreement: function () {
                        return paypalCheckoutInstance.createPayment(BraintreePayPal.getPaymentDetails());
                    },

                    onApprove: function (data, actions) {
                        return paypalCheckoutInstance.tokenizePayment(data).then(function (payload) {
                            let tokenBillingCheckbox = document.querySelector(
                                'input[name="token-billing-checkbox"]:checked'
                            );

                            if (tokenBillingCheckbox) {
                                document.querySelector('input[name="store_card"]').value =
                                    tokenBillingCheckbox.value;
                            }

                            document.querySelector('input[name=gateway_response]').value = JSON.stringify(payload);
                            document.getElementById('server-response').submit();
                        });
                    },

                    onCancel: function (data) {
                        // ..
                    },

                    onError: function (err) {
                        console.log(err.message);

                        BraintreePayPal.handleErrorMessage(err.message);
                    }
                }).render('#paypal-button');
            });
        }).catch(function (err) {
            console.log(err.message);

            BraintreePayPal.handleErrorMessage(err.message);
        });
    }
}

new BraintreePayPal().handle();