feat(auth-guard): Add Auth Guard

Author: davideast

src/auth-guard/auth-guard.ts

@@ -2,11 +2,11 @@ import { Injectable } from '@angular/core';
 import { ActivatedRouteSnapshot, CanActivate, Router, RouterStateSnapshot } from '@angular/router';
 import { Observable, of, pipe, UnaryFunction } from 'rxjs';
 import { map, switchMap, take } from 'rxjs/operators';
-import firebase from 'firebase/app';
+import { User } from 'firebase/auth';
 import { AngularFireAuth } from '@angular/fire/auth';
 
 export type AuthPipeGenerator = (next: ActivatedRouteSnapshot, state: RouterStateSnapshot) => AuthPipe;
-export type AuthPipe = UnaryFunction<Observable<firebase.User|null>, Observable<boolean|string|any[]>>;
+export type AuthPipe = UnaryFunction<Observable<User|null>, Observable<boolean|string|any[]>>;
 
 export const loggedIn: AuthPipe = map(user => !!user);
 
@@ -43,7 +43,7 @@ export const canActivate = (pipe: AuthPipeGenerator) => ({
 
 
 export const isNotAnonymous: AuthPipe = map(user => !!user && !user.isAnonymous);
-export const idTokenResult = switchMap((user: firebase.User|null) => user ? user.getIdTokenResult() : of(null));
+export const idTokenResult = switchMap((user: User|null) => user ? user.getIdTokenResult() : of(null));
 export const emailVerified: AuthPipe = map(user => !!user && user.emailVerified);
 export const customClaims = pipe(idTokenResult, map(idTokenResult => idTokenResult ? idTokenResult.claims : []));
 export const hasCustomClaim: (claim: string) => AuthPipe =