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import { Inject, Injectable, NgZone } from '@angular/core';
import { Router } from '@angular/router';
import { filter, map, race, switchMap, take, tap, timer } from 'rxjs';
import { CheckoutFacade } from 'ish-core/facades/checkout.facade';
import { PaymentMethod } from 'ish-core/models/payment-method/payment-method.model';
import { PaypalComponentsConfig } from 'ish-core/utils/paypal/adapters/paypal-adapters.builder';
import { PAYPAL_BUTTON_STYLING } from 'ish-core/utils/paypal/adapters/paypal-adapters.styling';
import { PaypalDataTransferService } from 'ish-core/utils/paypal/paypal-data-transfer/paypal-data-transfer.service';
import { PaypalComponent } from 'ish-core/utils/paypal/paypal-model/paypal.model';
interface PaypalShippingAddress {
city: string;
countryCode: string;
postalCode: string;
state: string;
}
/**
* Representation of the PayPal SDK Buttons object, responsible for rendering PayPal buttons and handling the associated callbacks for order creation, approval, cancellation, and error handling.
* Life cycle of this component ends with destroying of parent component PaymentPaypalComponent.
*/
@Injectable()
export class PaypalButtonsAdapter {
paypalShippingAddress: PaypalShippingAddress;
serviceAvailable = true;
constructor(
private ngZone: NgZone,
private checkoutFacade: CheckoutFacade,
private paypalDataTransferService: PaypalDataTransferService,
private router: Router,
@Inject(DOCUMENT) private document: Document
) {}
/**
* Renders PayPal buttons in the specified container and sets up the necessary callbacks for order creation, approval, cancellation, and error handling.
* @param config
* @returns
*/
renderButtons(config: PaypalComponentsConfig): Promise<void> {
const containerId = config.containerId;
const paypalObject = (window as unknown as Record<string, PaypalComponent>)[config.scriptNamespace];
// Verify element exists right before rendering
if (!this.document.getElementById(containerId)) {
throw new Error(`Container element '${containerId}' does not exist in DOM`);
}
if (!paypalObject?.Buttons) {
throw new Error(
`PayPal Buttons not available in loaded paypal sdk script with namespace '${config.scriptNamespace}'`
);
}
return paypalObject.Buttons(this.getButtonConfig(config)).render(`#${containerId}`);
}
private getButtonConfig(config: PaypalComponentsConfig) {
return {
style: config.pageType === 'checkout' ? PAYPAL_BUTTON_STYLING.checkout : PAYPAL_BUTTON_STYLING.cart,
createOrder: () => this.ngZone.run(() => this.createOrderCallback(config.paypalPaymentMethod)),
onApprove: (data: { payerID: string; orderID: string }) => {
this.ngZone.run(() => this.onApproveCallback(data));
},
// in case the shipping address was changed in the paypal overlay
onShippingAddressChange: (data: { shippingAddress: PaypalShippingAddress }) => {
this.paypalShippingAddress = data?.shippingAddress;
},
// after the user has cancelled the payment in the paypal overlay
onCancel: () => {
this.ngZone.run(() => this.onAbortCallback(config, 'cancel'));
},
onError: () => {
this.ngZone.run(() => this.onAbortCallback(config, this.serviceAvailable ? 'failure' : 'unavailable'));
},
};
}
protected createOrderCallback(paypalPaymentMethod: PaymentMethod): Promise<string> {
const orderIdPromise = new Promise<string>((resolve, reject) => {
race(
this.paypalDataTransferService.paypalOrder$.pipe(
map(data => data.orderId),
take(1)
),
timer(30000).pipe(
map(() => {
throw new Error('PayPal order ID not available');
})
)
).subscribe({
next: orderID => {
if (orderID) {
resolve(orderID);
} else {
this.serviceAvailable = false;
reject(new Error('PayPal order ID is empty'));
}
},
error: error => reject(error),
});
});
this.checkoutFacade.loadPaypalToken(paypalPaymentMethod.paymentInstruments[0]?.id || paypalPaymentMethod.serviceId);
return orderIdPromise;
}
protected onApproveCallback(data: { payerID: string; orderID: string }) {
this.checkoutFacade.basket$.pipe(take(1)).subscribe(basket => {
const basketAddress = basket?.commonShipToAddress;
let shippingAddressChanged = false;
if (this.paypalShippingAddress && basketAddress) {
const normalize = (val: string) => val?.trim()?.toLowerCase();
shippingAddressChanged =
normalize(basketAddress.country) !== normalize(this.paypalShippingAddress.countryCode) ||
normalize(basketAddress.postalCode) !== normalize(this.paypalShippingAddress.postalCode) ||
normalize(basketAddress.city) !== normalize(this.paypalShippingAddress.city);
} else if (this.paypalShippingAddress && !basketAddress) {
// If PayPal has an address but basket doesn't, address has changed
shippingAddressChanged = true;
}
this.router.navigate(['/checkout/review'], {
queryParams: {
redirect: 'success',
token: data.orderID,
PayerID: data.payerID,
shippingAddressChanged,
},
});
});
}
protected onAbortCallback(config: PaypalComponentsConfig, reason: 'cancel' | 'failure' | 'unavailable') {
if (!config.paypalPaymentMethod?.paymentInstruments?.length) {
return;
}
this.checkoutFacade.basket$
.pipe(
take(1),
tap(basket => {
if (basket.payment?.paymentInstrument?.id === config.paypalPaymentMethod.paymentInstruments[0]?.id) {
this.checkoutFacade.deleteBasketPayment(config.paypalPaymentMethod.paymentInstruments[0]);
}
}),
switchMap(() => this.checkoutFacade.basket$),
filter(basket => !basket.payment),
take(1)
)
.subscribe(() => {
this.router.navigate(
[config.paypalPaymentMethod.capabilities.includes('FastCheckout') ? '/basket' : '/checkout/payment'],
{ queryParams: { redirect: reason } }
);
});
}
}
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