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import { Inject, Injectable, NgZone } from '@angular/core';
import { filter, firstValueFrom, take } from 'rxjs';
import { AppFacade } from 'ish-core/facades/app.facade';
import { CheckoutFacade } from 'ish-core/facades/checkout.facade';
import { PaypalComponentsConfig } from 'ish-core/utils/paypal/adapters/paypal-adapters.builder';
import { PAYPAL_GOOGLE_PAY_BUTTON_STYLING } from 'ish-core/utils/paypal/adapters/paypal-adapters.styling';
import { PaypalConfigService } from 'ish-core/utils/paypal/paypal-config/paypal-config.service';
import {
PaypalDataTransferService,
PaypalOrderData,
} from 'ish-core/utils/paypal/paypal-data-transfer/paypal-data-transfer.service';
import {
GooglePayButton,
GooglePayConfig,
GooglePayPaymentAuthorizationResult,
GooglePayPaymentClient,
PaypalGooglePayComponent,
} from 'ish-core/utils/paypal/paypal-model/paypal-google-pay.model';
import { PaypalComponent } from 'ish-core/utils/paypal/paypal-model/paypal.model';
import { ScriptLoaderService } from 'ish-core/utils/script-loader/script-loader.service';
/**
* Representation of the PayPal SDK Google Pay object, responsible for rendering the Google Pay button
* and handling the associated callbacks for order creation, approval, and error handling.
*
* The Google Pay integration requires both the PayPal JavaScript SDK (with googlepay component)
* and the Google Pay JavaScript SDK to work together.
*
* Life cycle of this class ends with destroying of parent component PaymentPaypalComponent.
*/
@Injectable()
export class PaypalGooglePayAdapter {
static readonly GOOGLE_PAY_SDK_URL = 'https://pay.google.com/gp/p/js/pay.js';
static readonly GOOGLE_PAY_API_VERSION_MAJOR = 2;
static readonly GOOGLE_PAY_API_VERSION_MINOR = 0;
private googlePaymentClient: GooglePayPaymentClient;
private googlePayConfig: GooglePayConfig;
private paypalGooglePay: PaypalGooglePayComponent;
/**
* Holds order context during the payment flow.
* Set in startOrderCreation(), used in callbacks, cleared after flow completes.
* Required because Google Pay's onPaymentAuthorized callback doesn't support custom parameters.
*/
private orderContext: PaypalOrderData | undefined;
// default locale for Google Pay button, will be updated to current locale on initialization
private buttonLocale = 'en';
constructor(
private ngZone: NgZone,
private appFacade: AppFacade,
private checkoutFacade: CheckoutFacade,
private paypalConfigService: PaypalConfigService,
private paypalDataTransferService: PaypalDataTransferService,
private scriptLoaderService: ScriptLoaderService,
@Inject(DOCUMENT) private document: Document
) {
this.appFacade.currentLocale$
.pipe(
filter(locale => !!locale),
take(1)
)
.subscribe(locale => {
this.buttonLocale = locale.trim().split('_')[0];
});
}
/**
* Renders the Google Pay button in the specified container.
*
* @param config - Configuration for the Google Pay component
* @returns Promise that resolves when the button is rendered
*/
async renderGooglePayButton(config: PaypalComponentsConfig): Promise<void> {
const containerId = config.containerId;
const container = this.document.getElementById(containerId);
if (!container) {
return Promise.reject(new Error(`Container element '${containerId}' not found in DOM`));
}
const paypalObject = this.paypalConfigService.getPaypalComponent(config.paypalPaymentMethod);
if (!paypalObject?.Googlepay) {
return Promise.reject(new Error(`PayPal Googlepay not available on namespace '${config.scriptNamespace}'`));
}
return this.ngZone.run(async () => {
try {
const isGooglePayApplicable = await this.isGooglePayApplicable(paypalObject, true);
if (!isGooglePayApplicable) {
return Promise.reject('Google Pay is not available for the current user or device');
}
this.renderButton(container);
return Promise.resolve();
} catch (error) {
return Promise.reject(error);
}
});
}
private async isGooglePayApplicable(paypalObject: PaypalComponent, loadScript?: boolean): Promise<boolean> {
Eif (loadScript) {
await this.loadGooglePaySdk();
}
// Initialize PayPal Google Pay component
this.paypalGooglePay = paypalObject.Googlepay();
// Get Google Pay configuration from PayPal
try {
this.googlePayConfig = await this.paypalGooglePay.config();
} catch (configError) {
return Promise.reject(configError);
}
await this.createGooglePaymentsClient();
// Check if Google Pay is available
return await this.googlePaymentClient
.isReadyToPay({
apiVersion: PaypalGooglePayAdapter.GOOGLE_PAY_API_VERSION_MAJOR,
apiVersionMinor: PaypalGooglePayAdapter.GOOGLE_PAY_API_VERSION_MINOR,
allowedPaymentMethods: this.googlePayConfig.allowedPaymentMethods,
})
.then(result => result.result);
}
/**
* Loads the Google Pay JavaScript SDK.
*/
private async loadGooglePaySdk(): Promise<void> {
const result = await firstValueFrom(
this.scriptLoaderService.load(PaypalGooglePayAdapter.GOOGLE_PAY_SDK_URL).pipe(take(1))
);
Iif (!result.loaded) {
throw new Error('Failed to load Google Pay SDK');
}
}
/**
* Get a Google Payments Client instance. In case of multiple calls, the same instance will be returned to avoid unnecessary re-initialization.
* Must be called after googlePayConfig and googlePayEnvironment are loaded.
*/
private async createGooglePaymentsClient() {
Iif (this.googlePaymentClient) {
return;
}
// Load Google Pay environment setting
const paypalSettings = await firstValueFrom(this.appFacade.paypalClientConfig$.pipe(take(1)));
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const googlePayments = (window as any).google.payments.api;
this.googlePaymentClient = new googlePayments.PaymentsClient({
environment: paypalSettings.googlePayEnvironment,
merchantInfo: this.googlePayConfig?.merchantInfo,
paymentDataCallbacks: {
onPaymentAuthorized: (paymentData: { paymentMethodData: unknown }) =>
this.onPaymentAuthorizedCallback(paymentData.paymentMethodData),
},
});
}
/**
* Renders the Google Pay button in the specified container.
*/
private renderButton(container: HTMLElement): void {
container.replaceChildren();
const buttonConfig: GooglePayButton = {
onClick: () => {
this.ngZone.run(() => this.onGooglePayButtonClicked());
},
allowedPaymentMethods: this.googlePayConfig.allowedPaymentMethods,
...(PAYPAL_GOOGLE_PAY_BUTTON_STYLING as GooglePayButton),
buttonLocale: this.buttonLocale,
};
const button = this.googlePaymentClient.createButton(buttonConfig);
container.appendChild(button);
}
/**
* Handles the Google Pay button click event.
* Creates the payment data request and opens the Google Pay payment sheet.
* Order creation starts immediately when button is clicked to have PayPal order ID ready
* when user completes Google Pay authentication.
*/
private async onGooglePayButtonClicked(): Promise<void> {
try {
// Step 1: Start order creation and wait for orderId to be available
await this.startOrderCreation();
// Step 2: Create payment data request with basket information
const paymentDataRequest = await this.getPaymentDataRequest();
// Step 3: Load payment data - this triggers onPaymentAuthorized callback
await this.googlePaymentClient.loadPaymentData(paymentDataRequest);
} catch (error) {
// User closed the Google Pay popup without completing payment
Eif (
error &&
typeof error === 'object' &&
(error as { statusCode?: string }).statusCode === 'CANCELED' &&
this.orderContext?.orderId
) {
this.continueICMOrderCreation();
}
}
}
/**
* Creates the payment data request for Google Pay.
*/
private async getPaymentDataRequest() {
const basket = await firstValueFrom(
this.checkoutFacade.basket$.pipe(
filter(b => !!b),
take(1)
)
);
return {
apiVersion: PaypalGooglePayAdapter.GOOGLE_PAY_API_VERSION_MAJOR,
apiVersionMinor: PaypalGooglePayAdapter.GOOGLE_PAY_API_VERSION_MINOR,
allowedPaymentMethods: this.googlePayConfig.allowedPaymentMethods,
merchantInfo: this.googlePayConfig.merchantInfo,
transactionInfo: {
currencyCode: basket.totals?.total?.currency || 'USD',
totalPriceStatus: 'FINAL',
totalPrice: basket.totals?.total?.gross?.toString() || '0',
},
callbackIntents: ['PAYMENT_AUTHORIZATION'],
};
}
/**
* Handles the payment authorization callback from Google Pay.
*/
private async onPaymentAuthorizedCallback(paymentMethodData: unknown): Promise<GooglePayPaymentAuthorizationResult> {
try {
const confirmOrderResponse = await this.paypalGooglePay.confirmOrder({
orderId: this.orderContext?.paypalOrderId,
paymentMethodData,
});
if (confirmOrderResponse.status === 'APPROVED') {
return await this.continueICMOrderCreation();
} else if (confirmOrderResponse.status === 'PAYER_ACTION_REQUIRED') {
// Handle 3D Secure authentication using .then() pattern as recommended
this.paypalGooglePay
.initiatePayerAction({ orderId: this.orderContext?.paypalOrderId })
.then(() => this.continueICMOrderCreation())
.catch(() => this.continueICMOrderCreation());
// Return immediately so Google Pay sheet closes
return { transactionState: 'SUCCESS' };
} else {
return await this.continueICMOrderCreation();
}
} catch {
return await this.continueICMOrderCreation();
}
}
/**
* Start ICM order creation
*/
private async startOrderCreation(): Promise<void> {
// Subscribe first, then dispatch action to avoid race condition with Subject
const orderContentPromise = firstValueFrom(this.paypalDataTransferService.paypalOrder$.pipe(take(1)));
this.checkoutFacade.processPaypalOrderCreation();
// Wait for order content to be available before opening Google Pay sheet
const orderContent = await orderContentPromise;
Iif (orderContent.orderStatus === 'ERROR' || !orderContent.orderId || !orderContent.paypalOrderId) {
throw new Error('Error during order creation');
}
this.orderContext = orderContent;
}
/**
* ICM order creation needs to be continued after Google Pay authorization, regardless of the result of the PayPal order confirmation.
*/
private async continueICMOrderCreation(): Promise<GooglePayPaymentAuthorizationResult> {
Iif (!this.orderContext?.orderId) {
this.orderContext = undefined;
return { transactionState: 'ERROR' };
}
const orderContextPromise = firstValueFrom(
this.paypalDataTransferService.paypalOrder$.pipe(
filter(order => !!order?.orderStatus),
take(1)
)
);
this.checkoutFacade.processPaypalOrderCreation(this.orderContext.orderId);
const orderContext = await orderContextPromise;
this.orderContext = undefined;
return {
transactionState: orderContext.orderStatus === 'SUCCESS' ? 'SUCCESS' : 'ERROR',
};
}
}
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