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import { Inject, Injectable, NgZone } from '@angular/core';
import { TranslateService } from '@ngx-translate/core';
import { BehaviorSubject, Subject, firstValueFrom, race, timer } from 'rxjs';
import { map, take } from 'rxjs/operators';
import { CheckoutFacade } from 'ish-core/facades/checkout.facade';
import { PaymentMethod } from 'ish-core/models/payment-method/payment-method.model';
import { PAYPAL_CART_FIELDS_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 {
PaypalCardFieldError,
PaypalCardFieldsComponent,
PaypalCardFieldsIndividualField,
PaypalCardFieldsStateObject,
PaypalStateObject,
} from 'ish-core/utils/paypal/paypal-model/paypal.model';
/**
* Representation of the PayPal SDK Card Fields object, responsible for rendering PayPal card fields 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 PaypalCardFieldsAdapter {
paymentMethod: PaymentMethod;
cardField: PaypalCardFieldsComponent;
/** Emits when the card fields form should be closed */
closeForm$ = new Subject<void>();
/** Emits true when the card fields is start to submit */
loadingIframe$ = new BehaviorSubject<boolean>(false);
/** Emits true when the card fields is start to submit */
renderError$ = new Subject<string>();
/** Error state observables for each field */
nameFieldError$ = new BehaviorSubject<boolean>(false);
numberFieldError$ = new BehaviorSubject<boolean>(false);
cvvFieldError$ = new BehaviorSubject<boolean>(false);
expiryFieldError$ = new BehaviorSubject<boolean>(false);
private creditCardPaymentInstrumentId: string;
/** Flag to prevent blur validation during field reset */
private isResetting = false;
/** Flag to prevent prevent double submission */
private processing = false;
// Store rendered field instances for later access
private fields: Record<
string,
{
containerId: string;
instance: PaypalCardFieldsIndividualField;
}
> = {};
constructor(
private ngZone: NgZone,
private checkoutFacade: CheckoutFacade,
private paypalDataTransferService: PaypalDataTransferService,
private translateService: TranslateService,
@Inject(DOCUMENT) private document: Document
) {}
/**
* Creates and renders PayPal card fields in the specified containers.
*
* @param scriptNamespace - The PayPal SDK namespace on the window object
* @param config - Configuration for the card fields
* @returns Promise that resolves when all fields are rendered
*/
async renderCardFields(scriptNamespace: string, paymentMethod: PaymentMethod): Promise<void> {
// Access PayPal SDK from window object
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const paypalObject = (window as any)[scriptNamespace];
if (!paypalObject?.CardFields) {
return Promise.reject(new Error(`PayPal CardFields not available on namespace '${scriptNamespace}'`));
}
// Reset state for reinitialization
this.processing = false;
this.isResetting = false;
this.creditCardPaymentInstrumentId = undefined;
// Run PayPal SDK operations inside Angular zone to ensure proper event handling
return this.ngZone.run(async () => {
try {
this.cardField = paypalObject.CardFields({
createOrder: () => this.ngZone.run(() => this.createOrderCallback()),
onApprove: () => this.ngZone.run(() => this.onApproveCallback()),
onError: () => {
this.ngZone.run(() => this.onErrorCallback());
},
onCancel: () => {
this.ngZone.run(() => this.onCancelCallback());
},
inputEvents: {
onFocus: (data: PaypalCardFieldsStateObject) => {
this.ngZone.run(() => this.handleFieldFocus(data));
},
onBlur: (data: PaypalCardFieldsStateObject) => {
this.ngZone.run(() => this.handleFieldBlur(data));
},
},
}) as PaypalCardFieldsComponent;
if (!this.cardField.isEligible()) {
console.warn('PayPal CardFields: Not eligible for rendering');
}
// Check if card fields are eligible
if (this.cardField.isEligible()) {
// Render individual fields outside Angular zone for proper iframe interaction
await this.renderIndividualFields();
// set payment method for use in createOrder and onApprove callbacks
this.paymentMethod = paymentMethod;
// Setup submit and cancel button handlers
this.setupHandlerForButtons();
}
} catch (error) {
console.error('PayPal card fields rendering failed:', error);
return Promise.reject(error);
}
});
}
/**
* Renders individual card input fields (name, number, CVV, expiry).
*/
protected async renderIndividualFields(): Promise<void> {
// Clear any existing fields from previous renders
this.cleanupExistingFields();
// Wait for DOM to be fully ready before rendering
await new Promise<void>(resolve => setTimeout(resolve, 100));
const fieldConfigs = [
{
key: 'name',
containerId: 'card-name-field-container',
factory: () => this.cardField.NameField({ style: PAYPAL_CART_FIELDS_STYLING, placeholder: '' }),
},
{
key: 'number',
containerId: 'card-number-field-container',
factory: () => this.cardField.NumberField({ style: PAYPAL_CART_FIELDS_STYLING, placeholder: '' }),
},
{
key: 'cvv',
containerId: 'card-cvv-field-container',
factory: () => this.cardField.CVVField({ style: PAYPAL_CART_FIELDS_STYLING, placeholder: '' }),
},
{
key: 'expiry',
containerId: 'card-expiry-field-container',
factory: () => this.cardField.ExpiryField({ style: PAYPAL_CART_FIELDS_STYLING }),
},
];
// Render fields sequentially - PayPal SDK may have issues with parallel rendering
for (const config of fieldConfigs) {
await this.renderSingleField(config, 0);
}
}
/**
* Cleans up existing field instances before reinitialization.
*/
private cleanupExistingFields(): void {
// Clear containers in DOM
Object.values(this.fields).forEach(field => {
const container = this.document.getElementById(field.containerId);
Iif (container) {
container.innerHTML = '';
}
});
// Reset fields record
this.fields = {};
}
/**
* Renders a single card field with retry capability.
* @param config - Field configuration
* @param attempt - Current attempt number (0-based)
*/
private async renderSingleField(
config: { key: string; containerId: string; factory(): PaypalCardFieldsIndividualField },
attempt: number
): Promise<void> {
const maxRetries = 3;
const retryDelay = 500;
try {
const container = this.document.getElementById(config.containerId);
Iif (!container) {
console.warn(`PayPal CardFields: Container '#${config.containerId}' not found in DOM`);
return;
}
// Ensure container is empty before rendering
if (container.innerHTML) {
container.innerHTML = '';
// Small delay after clearing to let DOM settle
await new Promise<void>(resolve => setTimeout(resolve, 50));
}
this.fields[config.key] = {
containerId: config.containerId,
instance: config.factory(),
};
await this.fields[config.key].instance.render(`#${config.containerId}`);
// Small delay after render to let iframe initialize
await new Promise<void>(resolve => setTimeout(resolve, 100));
// Verify that PayPal SDK actually rendered content in the container
Iif (!container.hasChildNodes() && attempt < maxRetries) {
// Retry if we haven't exceeded max attempts
delete this.fields[config.key];
await new Promise<void>(resolve => setTimeout(resolve, retryDelay));
return this.renderSingleField(config, attempt + 1);
}
Iif (!container.hasChildNodes() && attempt === maxRetries) {
this.renderError$.next('checkout.payment.paypal.script.render.error.message');
}
} catch (error) {
// On error, retry if possible
if (attempt < maxRetries) {
delete this.fields[config.key];
await new Promise<void>(resolve => setTimeout(resolve, retryDelay));
return this.renderSingleField(config, attempt + 1);
}
this.renderError$.next('checkout.payment.paypal.script.render.error.message');
}
}
/**
* Handles field focus events to hide any existing error messages and re-enable submit button.
*/
private handleFieldFocus(data: PaypalCardFieldsStateObject): void {
this.hideFieldError(data.emittedBy);
}
/**
* Handles field blur events to validate and show errors if necessary.
*/
private handleFieldBlur(data: PaypalCardFieldsStateObject): void {
// Skip validation during field reset to prevent race conditions
Iif (this.isResetting) {
return;
}
const fieldConfig: Record<string, { fieldState: { isValid: boolean; isEmpty: boolean } }> = {
name: { fieldState: data.fields.cardNameField },
number: { fieldState: data.fields.cardNumberField },
cvv: { fieldState: data.fields.cardCvvField },
expiry: { fieldState: data.fields.cardExpiryField },
};
const config = fieldConfig[data.emittedBy];
if (config && !config.fieldState.isValid) {
config.fieldState.isEmpty ? this.hideFieldError(data.emittedBy) : this.showFieldError(data.emittedBy);
}
}
/**
* Sets up the submit button and cancel button event handler for card field submission/cancellation.
*/
private setupHandlerForButtons(): void {
const submitButton = this.document.getElementById('card-field-submit-button');
const cancelButton = this.document.getElementById('card-field-cancel-button');
if (submitButton) {
submitButton.addEventListener('click', () => {
this.ngZone.run(async () => {
if (!this.processing) {
this.cardField.submit().catch(() => {
this.validationErrorHandler(this.cardField.getState());
});
this.loadingIframe$.next(true);
this.processing = true;
}
});
});
}
if (cancelButton) {
cancelButton.addEventListener('click', () => {
this.ngZone.run(() => {
this.resetFieldValues();
this.closeForm$.next();
});
});
}
}
/**
* Paypal Order Id creation callback. Creates a basket payment and waits for the orderId from the service.
*/
protected async createOrderCallback(): Promise<string> {
const orderId = this.waitForOrderData();
this.checkoutFacade.createPaypalCreditCardBasketPayment({
id: undefined,
paymentMethod: this.paymentMethod.id,
});
return orderId;
}
/**
* Waits for the PayPal order data from the service with a timeout.
*/
private waitForOrderData(): Promise<string> {
const orderData$ = this.paypalDataTransferService.paypalOrder$.pipe(
take(1),
map(data => {
this.creditCardPaymentInstrumentId = data.paymentInstrumentId;
return data.orderId;
})
);
const timeout$ = timer(3000).pipe(
map(() => {
throw new Error('PayPal order ID not received within 3 seconds');
})
);
return firstValueFrom(race(orderData$, timeout$));
}
/**
* Handles PayPal payment approval.
*/
protected async onApproveCallback() {
this.loadingIframe$.next(false);
this.resetFieldValues();
this.checkoutFacade.submitPaypalPaymentInstrument({
id: this.creditCardPaymentInstrumentId,
paymentMethod: this.paymentMethod.id,
});
this.processing = false;
}
/**
* Handles PayPal payment errors.
*/
protected async onErrorCallback() {
this.loadingIframe$.next(false);
if (this.creditCardPaymentInstrumentId) {
this.checkoutFacade.deletePaypalPayment(
{
id: this.creditCardPaymentInstrumentId,
paymentMethod: this.paymentMethod.id,
},
this.translateService.instant('checkout.payment.paypal.error.message')
);
}
this.resetFieldValues();
this.processing = false;
}
/**
* Handles PayPal payment cancellation.
*/
protected onCancelCallback(): void {
this.loadingIframe$.next(false);
this.processing = false;
if (this.creditCardPaymentInstrumentId) {
this.checkoutFacade.deletePaypalPayment({
id: this.creditCardPaymentInstrumentId,
paymentMethod: this.paymentMethod.id,
});
}
}
private resetFieldValues(): void {
this.isResetting = true;
const allFields = Object.keys(this.fields);
// Clear field values
allFields.forEach(key => {
this.fields[key].instance.clear();
});
// Remove error styles multiple times to ensure we override PayPal's internal async validation
// PayPal SDK sets 'invalid' class internally during blur, timing is unpredictable
const removeInvalidClass = () => allFields.forEach(field => this.hideFieldError(field));
// Multiple attempts at different timings to catch PayPal's async validation
const delays = [50, 150, 300];
delays.forEach((delay, index) => {
setTimeout(() => {
removeInvalidClass();
if (index === delays.length - 1) {
this.isResetting = false;
}
}, delay);
});
}
/**
* Default error handler for PayPal card fields.
*/
private validationErrorHandler(statePromise: Promise<PaypalStateObject>): void {
statePromise.then(stateObject => {
const cardFieldsState = stateObject?.value ?? (stateObject as unknown as PaypalCardFieldsStateObject);
this.handleSubmitError(cardFieldsState);
});
}
/**
* Handles card field validation errors.
*/
private handleSubmitError(state: PaypalCardFieldsStateObject): void {
this.loadingIframe$.next(false);
this.processing = false;
state.errors.forEach(error => {
switch (error) {
case PaypalCardFieldError.InvalidName:
this.showFieldError('name');
break;
case PaypalCardFieldError.InvalidNumber:
this.showFieldError('number');
break;
case PaypalCardFieldError.InvalidCvv:
this.showFieldError('cvv');
break;
case PaypalCardFieldError.InvalidExpiry:
this.showFieldError('expiry');
break;
}
});
}
/**
* Displays error message for a specific field and marks the input as invalid.
*/
private showFieldError(fieldName: string): void {
const field = this.fields[fieldName];
if (field) {
this.setFieldErrorState(fieldName, true);
field.instance.addClass('invalid');
field.instance.setAttribute('aria-invalid', 'true');
}
}
/**
* Hides error message, classes and aria attribute for a specific field
*/
private hideFieldError(fieldName: string): void {
const field = this.fields[fieldName];
if (field) {
this.setFieldErrorState(fieldName, false);
field.instance.removeClass('invalid');
field.instance.setAttribute('aria-invalid', 'false');
}
}
/**
* Updates the error state observable for a specific field.
*/
private setFieldErrorState(fieldName: string, hasError: boolean): void {
const errorSubjects: Record<string, BehaviorSubject<boolean>> = {
name: this.nameFieldError$,
number: this.numberFieldError$,
cvv: this.cvvFieldError$,
expiry: this.expiryFieldError$,
};
errorSubjects[fieldName]?.next(hasError);
}
}
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