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index.ts
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index.ts
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/**
* @license
* Copyright 2018 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// auth is used as a namespace to access types
// eslint-disable-next-line @typescript-eslint/no-unused-vars
import firebase from 'firebase';
import { Observable, from, of } from 'rxjs';
import { switchMap } from 'rxjs/operators';
type Auth = firebase.auth.Auth;
type User = firebase.User;
/**
* Create an observable of authentication state. The observer is only
* triggered on sign-in or sign-out.
* @param auth firebase.auth.Auth
*/
export function authState(auth: Auth): Observable<User> {
return new Observable(subscriber => {
const unsubscribe = auth.onAuthStateChanged(subscriber);
return { unsubscribe };
});
}
/**
* Create an observable of user state. The observer is triggered for sign-in,
* sign-out, and token refresh events
* @param auth firebase.auth.Auth
*/
export function user(auth: Auth): Observable<User> {
return new Observable(subscriber => {
const unsubscribe = auth.onIdTokenChanged(subscriber);
return { unsubscribe };
});
}
/**
* Create an observable of idToken state. The observer is triggered for sign-in,
* sign-out, and token refresh events
* @param auth firebase.auth.Auth
*/
export function idToken(auth: Auth): Observable<string | null> {
return user(auth).pipe(
switchMap(user => (user ? from(user.getIdToken()) : of(null)))
);
}