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import {
AfterViewInit,
ChangeDetectionStrategy,
Component,
DestroyRef,
ElementRef,
Input,
NgModule,
OnInit,
inject,
} from '@angular/core';
import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
import { FormGroup, Validators } from '@angular/forms';
import { TranslatePipe } from '@ngx-translate/core';
import { RECAPTCHA_V3_SITE_KEY, ReCaptchaV3Service, RecaptchaV3Module } from 'ng-recaptcha-2';
import { fromEvent, race, timer } from 'rxjs';
import { exhaustMap, filter, map, tap } from 'rxjs/operators';
import { DirectivesModule } from 'ish-core/directives.module';
import {
SitekeyProviderService,
getSynchronizedSiteKey,
} from '../../exports/sitekey-provider/sitekey-provider.service';
/**
* The Captcha V3 Component
*
* Displays a captcha widget (V3) and saves the response token in the given form. It should only be used by {@link CaptchaComponent}
*/
@Component({
selector: 'ish-captcha-v3',
standalone: false,
templateUrl: './captcha-v3.component.html',
changeDetection: ChangeDetectionStrategy.OnPush,
})
export class CaptchaV3Component implements OnInit, AfterViewInit {
@Input({ required: true }) parentForm: FormGroup;
private tokenReady = false;
private destroyRef = inject(DestroyRef);
constructor(
private elementRef: ElementRef<HTMLElement>,
private recaptchaV3Service: ReCaptchaV3Service
) {}
ngOnInit() {
this.parentForm.get('captchaAction').setValidators([Validators.required]);
}
ngAfterViewInit() {
Iif (SSR) {
return;
}
const formElement = this.elementRef.nativeElement.closest('form');
if (!formElement) {
return;
}
// Intercept form submit in capture phase: block until a fresh reCAPTCHA token is obtained,
// then re-trigger the submit so Angular's (ngSubmit) fires with the token in place.
let pendingSubmitter: HTMLElement;
fromEvent<SubmitEvent>(formElement, 'submit', { capture: true })
.pipe(
filter(event => this.interceptSubmit(event)),
tap(event => {
pendingSubmitter = event.submitter;
event.preventDefault();
event.stopPropagation();
}),
exhaustMap(() => this.requestToken()),
takeUntilDestroyed(this.destroyRef)
)
.subscribe(token => {
this.applyTokenAndResubmit(token, formElement, pendingSubmitter);
pendingSubmitter = undefined;
});
}
private interceptSubmit(_event: SubmitEvent): boolean {
if (this.tokenReady) {
this.tokenReady = false;
return false;
}
// Clear previous captcha errors so they don't block a retry
this.parentForm.get('captcha').setErrors(undefined);
return this.parentForm.valid;
}
private requestToken() {
return race(
this.recaptchaV3Service.execute(this.parentForm.get('captchaAction').value),
timer(2000).pipe(map(() => ''))
);
}
private applyTokenAndResubmit(token: string, formElement: HTMLFormElement, submitter: HTMLElement) {
this.parentForm.get('captcha').setValue(token);
this.parentForm.get('captcha').updateValueAndValidity();
this.tokenReady = true;
formElement.requestSubmit(submitter);
}
}
@NgModule({
declarations: [CaptchaV3Component],
imports: [DirectivesModule, RecaptchaV3Module, TranslatePipe],
providers: [
{
provide: RECAPTCHA_V3_SITE_KEY,
useFactory: getSynchronizedSiteKey,
deps: [SitekeyProviderService],
},
],
})
export class CaptchaV3ComponentModule {}
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