import { EnvironmentInjector, inject, runInInjectionContext } from '@angular/core'; import { Auth, validatePassword } from '@angular/fire/auth'; import type { PasswordValidationStatus } from '@angular/fire/auth'; import type { AbstractControl, AsyncValidatorFn, ValidationErrors } from '@angular/forms'; import { getPasswordControlValue } from './util'; /**  * Validate against the Firebase Project Authentication Password Policy.  *  * Note: at this time there is no actual need for this because the policy only enforces length and  * other Validators already check for that. However it is nice to know how to do this.  */ export const passwordFirebaseValidator = (): AsyncValidatorFn => { const auth: Auth = inject(Auth); const environmentInjector = inject(EnvironmentInjector); return async (control: AbstractControl<unknown>): Promise<ValidationErrors | null> => { const value = getPasswordControlValue(control); // Like Validators.email, rely on Validators.required to check for blank passwords. if (value == undefined) { return null; // eslint-disable-line unicorn/no-null -- ValidatorFn returns null } const { passwordPolicy: _, ...status } = await runInInjectionContext( environmentInjector, async (): Promise<PasswordValidationStatus> => validatePassword(auth, value), ); return status.isValid ? null : { firebasevalidator: status }; // eslint-disable-line unicorn/no-null }; };