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import { DestroyRef, Inject, Injectable, NgZone } from '@angular/core';
import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
import { filter, firstValueFrom, take } from 'rxjs';
import { AppFacade } from 'ish-core/facades/app.facade';
import { CheckoutFacade } from 'ish-core/facades/checkout.facade';
import { BasketView } from 'ish-core/models/basket/basket.model';
import { whenTruthy } from 'ish-core/utils/operators';
import { PaypalComponentsConfig } from 'ish-core/utils/paypal/adapters/paypal-adapters.builder';
import { PAYPAL_APPLE_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 {
ApplePayConfig,
ApplePayPaymentAuthorizedEvent,
ApplePayPaymentRequest,
ApplePaySessionInstance,
ApplePaySessionStatic,
PaypalApplePayComponent,
} from 'ish-core/utils/paypal/paypal-model/paypal-apple-pay.model';
import { ScriptLoaderService } from 'ish-core/utils/script-loader/script-loader.service';
// ApplePaySession is a global browser API, declared here for type safety
// eslint-disable-next-line @typescript-eslint/naming-convention
declare const ApplePaySession: ApplePaySessionStatic;
/**
* Representation of the PayPal SDK Apple Pay object, responsible for rendering the Apple Pay button
* and handling the associated callbacks for order creation, approval, and error handling.
*
* The Apple Pay integration requires both the PayPal JavaScript SDK (with applepay component)
* and the Apple Pay JavaScript SDK to work together.
*
* Life cycle of this class ends with destroying of parent component PaymentPaypalComponent.
*/
@Injectable()
export class PaypalApplePayAdapter {
static readonly APPLE_PAY_SDK_URL = 'https://applepay.cdn-apple.com/jsapi/1.latest/apple-pay-sdk.js';
static readonly APPLE_PAY_API_VERSION = 4;
private applePayConfig: ApplePayConfig;
private paypalApplePay: PaypalApplePayComponent;
private loading = false;
private merchantId: string;
private orderContext: PaypalOrderData;
private currentBasket: BasketView;
private applePayButton: HTMLElement | undefined;
private buttonClickHandler: (() => void) | undefined;
constructor(
private ngZone: NgZone,
private appFacade: AppFacade,
private destroyRef: DestroyRef,
private checkoutFacade: CheckoutFacade,
private paypalConfigService: PaypalConfigService,
private paypalDataTransferService: PaypalDataTransferService,
private scriptLoaderService: ScriptLoaderService,
@Inject(DOCUMENT) private document: Document
) {
this.destroyRef.onDestroy(() => this.cleanup());
}
/**
* Checks if Apple Pay is available in the current browser.
*/
static isApplePayAvailable(): boolean {
if (typeof ApplePaySession === 'undefined') {
return false;
}
if (!ApplePaySession.canMakePayments()) {
return false;
}
try {
return ApplePaySession.supportsVersion(PaypalApplePayAdapter.APPLE_PAY_API_VERSION);
} catch {
// supportsVersion may throw if version is invalid
return false;
}
}
/**
* Renders the Apple Pay button in the specified container.
*
* @param config - Configuration for the Apple Pay component
* @returns Promise that resolves when the button is rendered
*/
async renderApplePayButton(config: PaypalComponentsConfig): Promise<void> {
const containerId = config.containerId;
const container = this.document.getElementById(containerId);
this.merchantId = config.merchantId;
await this.loadApplePaySdk();
if (!container) {
return Promise.reject(new Error(`Container element '${containerId}' not found in DOM`));
}
// Check if Apple Pay is available in the browser
if (!PaypalApplePayAdapter.isApplePayAvailable()) {
return Promise.reject(new Error('Apple Pay is not available in this browser'));
}
const paypalObject = this.paypalConfigService.getPaypalComponent(config.paypalPaymentMethod);
if (!paypalObject?.Applepay) {
return Promise.reject(new Error(`PayPal Applepay not available on namespace '${config.scriptNamespace}'`));
}
return this.ngZone.run(async () => {
try {
// Initialize PayPal Apple Pay component
this.paypalApplePay = paypalObject.Applepay();
// Get Apple Pay configuration from PayPal
try {
this.applePayConfig = await this.paypalApplePay.config();
} catch (configError) {
console.error('PayPal Apple Pay configuration could not be estimated:', configError);
return Promise.reject(configError);
}
// Check if Apple Pay is eligible for this merchant
if (!this.applePayConfig.isEligible) {
return Promise.reject(new Error('Apple Pay is not eligible for this merchant'));
}
// Pre-cache basket data for synchronous access in click handler
await this.cacheBasketData();
this.renderButton(container);
return Promise.resolve();
} catch (error) {
console.error('Apple Pay initialization failed:', error);
return Promise.reject(error);
}
});
}
/**
* Cleanup resources to prevent memory leaks.
*/
private cleanup(): void {
if (this.applePayButton && this.buttonClickHandler) {
this.applePayButton.removeEventListener('click', this.buttonClickHandler);
}
this.applePayButton?.remove();
this.applePayButton = undefined;
this.buttonClickHandler = undefined;
}
/**
* Loads the Apple Pay JavaScript SDK.
*/
private loadApplePaySdk(): Promise<void> {
return firstValueFrom(this.scriptLoaderService.load(PaypalApplePayAdapter.APPLE_PAY_SDK_URL).pipe(take(1))).then(
result => {
Iif (!result.loaded) {
throw new Error('Failed to load Apple Pay SDK');
}
}
);
}
/**
* Renders the Apple Pay button in the specified container.
*/
private renderButton(container: HTMLElement): void {
let locale = 'en';
this.appFacade.currentLocale$.pipe(takeUntilDestroyed(this.destroyRef)).subscribe(currentLocale => {
locale = currentLocale.split('_')[0];
});
const button = this.document.createElement('apple-pay-button');
// Apply button styling
button.setAttribute('id', 'btn-appl');
button.setAttribute('locale', locale);
button.setAttribute('buttonstyle', PAYPAL_APPLE_PAY_BUTTON_STYLING.buttonStyle);
button.setAttribute('type', PAYPAL_APPLE_PAY_BUTTON_STYLING.buttonType);
button.style.setProperty('--apple-pay-button-width', PAYPAL_APPLE_PAY_BUTTON_STYLING.width);
button.style.setProperty('--apple-pay-button-height', PAYPAL_APPLE_PAY_BUTTON_STYLING.height);
button.style.setProperty('--apple-pay-button-border-radius', PAYPAL_APPLE_PAY_BUTTON_STYLING.borderRadius);
button.style.cursor = 'pointer';
this.buttonClickHandler = () => this.ngZone.run(() => this.onApplePayButtonClicked());
button.addEventListener('click', this.buttonClickHandler);
this.applePayButton = button;
container.appendChild(button);
}
/**
* Handles the Apple Pay button click event.
* Creates the payment request and opens the Apple Pay payment sheet.
* IMPORTANT: ApplePaySession must be created synchronously from user gesture.
* Order creation is kicked off without awaiting and resolved inside onvalidatemerchant.
*/
private onApplePayButtonClicked(): void {
if (this.loading) {
return;
}
this.loading = true;
// Kick off ICM order creation without awaiting – must not block synchronous session creation
this.checkoutFacade.processPaypalOrderCreation();
const orderContextPromise = firstValueFrom(this.paypalDataTransferService.paypalOrder$);
// ApplePaySession MUST be created synchronously as part of the user gesture
let session: ApplePaySessionInstance;
try {
session = new ApplePaySession(PaypalApplePayAdapter.APPLE_PAY_API_VERSION, this.getPaymentRequest());
} catch (error) {
this.loading = false;
console.error('Error creating Apple Pay session:', error);
return;
}
session.onvalidatemerchant = async (event: { validationURL: string }) => {
// Ensure order context is resolved before proceeding (already assigned via .then() at session.begin())
await orderContextPromise;
Eif (this.orderContext.orderStatus === 'ERROR' || !this.orderContext.paypalOrderId) {
return;
}
await this.onValidateMerchant(event.validationURL, session);
};
session.onpaymentauthorized = async (event: ApplePayPaymentAuthorizedEvent) => {
await this.onPaymentAuthorized(event, session);
};
session.oncancel = async () => {
this.loading = false;
if (!this.orderContext?.orderId) {
return;
}
try {
await this.continueICMOrderCreation(this.orderContext.orderId);
} catch (error) {
console.error('Error during ICM order continuation after Apple Pay cancellation:', error);
}
};
session.begin();
orderContextPromise.then(context => {
this.orderContext = context;
if (this.orderContext.orderStatus === 'ERROR') {
console.error('Order creation failed or no PayPal order ID available, aborting Apple Pay session');
this.loading = false;
session.abort();
}
});
}
/**
* Pre-caches basket data for synchronous access in click handler.
*/
private async cacheBasketData(): Promise<void> {
this.currentBasket = await firstValueFrom(
this.checkoutFacade.basket$.pipe(
whenTruthy(),
filter(b => !!b),
take(1)
)
);
}
/**
* Creates the payment request using current basket data.
*/
private getPaymentRequest(): ApplePayPaymentRequest {
return {
countryCode: this.applePayConfig.countryCode,
currencyCode: this.currentBasket.totals?.total?.currency || 'USD',
merchantCapabilities: this.applePayConfig.merchantCapabilities,
supportedNetworks: this.applePayConfig.supportedNetworks,
total: {
label: this.merchantId,
amount: this.currentBasket.totals?.total?.gross?.toString() || '0',
type: 'final',
},
};
}
/**
* Maps the billing contact data from the current basket to the format expected by Apple Pay.
*/
private mapBillingContactData() {
const address = this.currentBasket.invoiceToAddress;
if (address) {
return {
givenName: address.firstName,
familyName: address.lastName,
emailAddress: address.email,
phoneNumber: address.phoneHome || address.phoneMobile || address.phoneBusiness,
addressLines: [address.addressLine1, address.addressLine2, address.addressLine3].filter(Boolean),
locality: address.city,
administrativeArea: address.mainDivisionCode || address.mainDivision,
postalCode: address.postalCode,
countryCode: address.countryCode,
};
}
return {};
}
/**
* Handles the merchant validation callback from Apple Pay.
* This is called when Apple Pay needs to verify the merchant.
*/
private async onValidateMerchant(validationURL: string, session: ApplePaySessionInstance) {
try {
const payload = await this.paypalApplePay.validateMerchant({
validationUrl: validationURL,
domainName: window.location.hostname,
});
session.completeMerchantValidation(payload.merchantSession);
} catch {
await this.continueICMOrderCreation(this.orderContext.orderId);
session.abort();
this.loading = false;
}
}
/**
* Handles the payment authorization callback from Apple Pay.
*/
private async onPaymentAuthorized(
event: ApplePayPaymentAuthorizedEvent,
session: ApplePaySessionInstance
): Promise<void> {
try {
// Confirm the order with PayPal
await this.paypalApplePay.confirmOrder({
orderId: this.orderContext.paypalOrderId,
token: event.payment.token,
billingContact: this.mapBillingContactData(),
});
// Complete the payment
const result = await this.continueICMOrderCreation(this.orderContext.orderId);
if (result.status === 'SUCCESS') {
session.completePayment({ status: ApplePaySession.STATUS_SUCCESS });
} else E{
session.completePayment({ status: ApplePaySession.STATUS_FAILURE });
}
} catch {
this.checkoutFacade.processPaypalOrderCreation(this.orderContext.orderId);
session.completePayment({ status: ApplePaySession.STATUS_FAILURE });
} finally {
this.loading = false;
}
}
/**
* ICM order creation needs to be continued after Apple Pay authorization.
*/
private async continueICMOrderCreation(orderId: string): Promise<{ status: 'SUCCESS' | 'CANCELLED' | 'ERROR' }> {
const orderContextPromise = firstValueFrom(
this.paypalDataTransferService.paypalOrder$.pipe(
filter(order => !!order?.orderStatus),
take(1)
)
);
this.checkoutFacade.processPaypalOrderCreation(orderId);
const orderContext = await orderContextPromise;
return {
status: orderContext.orderStatus,
};
}
}
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