feat(auth-guard): Adding in modular auth guards (#3001)

* Adding modular auth guards
* Flushing out some basic tests
* Refactored how `isSupported` is handled
* Firestore wasn't passing the injector, need tests for this too
* Fixed the version check on firebase-tools
* Fixed firebase-tools project creation
* Cleaned up some of the error messaging

firebase.json

@@ -10,6 +10,12 @@
     "rules": "test/storage.rules"
   },
   "emulators": {
+    "auth": {
+      "port": 9099
+    },
+    "functions": {
+      "port": 5001
+    },
     "firestore": {
       "port": 8080
     },

src/analytics/analytics.module.ts

@@ -1,30 +1,23 @@
 import { NgModule, Optional, NgZone, InjectionToken, ModuleWithProviders, APP_INITIALIZER, Injector } from '@angular/core';
-import { Analytics as FirebaseAnalytics, isSupported } from 'firebase/analytics';
-import { ɵgetDefaultInstanceOf, ɵAngularFireSchedulers, VERSION } from '@angular/fire';
+import { Analytics as FirebaseAnalytics } from 'firebase/analytics';
+import { ɵgetDefaultInstanceOf, ɵAngularFireSchedulers, VERSION, ɵisAnalyticsSupportedFactory } from '@angular/fire';
 import { Analytics, ANALYTICS_PROVIDER_NAME, AnalyticsInstances } from './analytics';
 import { FirebaseApps, FirebaseApp } from '@angular/fire/app';
 import { registerVersion } from 'firebase/app';
 import { ScreenTrackingService } from './screen-tracking.service';
 import { UserTrackingService } from './user-tracking.service';
 
-export const PROVIDED_ANALYTICS_INSTANCE_FACTORIES = new InjectionToken<Array<(injector: Injector) => Analytics>>('angularfire2.analytics-instances.factory');
 export const PROVIDED_ANALYTICS_INSTANCES = new InjectionToken<Analytics[]>('angularfire2.analytics-instances');
-const IS_SUPPORTED = new InjectionToken<boolean>('angularfire2.analytics.isSupported');
 
-const isSupportedValueSymbol = Symbol('angularfire2.analytics.isSupported.value');
-export const isSupportedPromiseSymbol = Symbol('angularfire2.analytics.isSupported');
-
-globalThis[isSupportedPromiseSymbol] ||= isSupported().then(it => globalThis[isSupportedValueSymbol] = it);
-
-export function defaultAnalyticsInstanceFactory(isSupported: boolean, provided: FirebaseAnalytics[]|undefined, defaultApp: FirebaseApp) {
-  if (!isSupported) { return null; }
+export function defaultAnalyticsInstanceFactory(provided: FirebaseAnalytics[]|undefined, defaultApp: FirebaseApp) {
+  if (!ɵisAnalyticsSupportedFactory.sync()) { return null; }
   const defaultAnalytics = ɵgetDefaultInstanceOf<FirebaseAnalytics>(ANALYTICS_PROVIDER_NAME, provided, defaultApp);
   return defaultAnalytics && new Analytics(defaultAnalytics);
 }
 
 export function analyticsInstanceFactory(fn: (injector: Injector) => FirebaseAnalytics) {
-  return (zone: NgZone, isSupported: boolean, injector: Injector) => {
-    if (!isSupported) { return null; }
+  return (zone: NgZone, injector: Injector) => {
+    if (!ɵisAnalyticsSupportedFactory.sync()) { return null; }
     const analytics = zone.runOutsideAngular(() => fn(injector));
     return new Analytics(analytics);
   };
@@ -41,7 +34,6 @@ const DEFAULT_ANALYTICS_INSTANCE_PROVIDER = {
   provide: Analytics,
   useFactory: defaultAnalyticsInstanceFactory,
   deps: [
-    IS_SUPPORTED,
     [new Optional(), PROVIDED_ANALYTICS_INSTANCES ],
     FirebaseApp,
   ]
@@ -53,15 +45,15 @@ const DEFAULT_ANALYTICS_INSTANCE_PROVIDER = {
     ANALYTICS_INSTANCES_PROVIDER,
     {
       provide: APP_INITIALIZER,
-      useValue: () => globalThis[isSupportedPromiseSymbol],
+      useValue: ɵisAnalyticsSupportedFactory.async,
       multi: true,
     }
   ]
 })
 export class AnalyticsModule {
   constructor(
-    @Optional() _screenTracking: ScreenTrackingService,
-    @Optional() _userTracking: UserTrackingService,
+    @Optional() _screenTrackingService: ScreenTrackingService,
+    @Optional() _userTrackingService: UserTrackingService,
   ) {
     registerVersion('angularfire', VERSION.full, 'analytics');
   }
@@ -71,19 +63,11 @@ export function provideAnalytics(fn: (injector: Injector) => FirebaseAnalytics,
   return {
     ngModule: AnalyticsModule,
     providers: [{
-      provide: IS_SUPPORTED,
-      useFactory: () => globalThis[isSupportedValueSymbol],
-    }, {
-      provide: PROVIDED_ANALYTICS_INSTANCE_FACTORIES,
-      useValue: fn,
-      multi: true,
-    }, {
       provide: PROVIDED_ANALYTICS_INSTANCES,
       useFactory: analyticsInstanceFactory(fn),
       multi: true,
       deps: [
         NgZone,
-        IS_SUPPORTED,
         Injector,
         ɵAngularFireSchedulers,
         FirebaseApps,

src/analytics/analytics.spec.ts

@@ -0,0 +1,50 @@
+import { TestBed } from '@angular/core/testing';
+import { FirebaseApp, provideFirebaseApp, getApp, initializeApp, deleteApp } from '@angular/fire/app';
+import { Analytics, provideAnalytics, getAnalytics, isSupported } from '@angular/fire/analytics';
+import { COMMON_CONFIG } from '../test-config';
+import { rando } from '../utils';
+
+describe('Analytics', () => {
+  let app: FirebaseApp;
+  let analytics: Analytics;
+  let providedAnalytics: Analytics;
+  let appName: string;
+
+  beforeAll(done => {
+    // The APP_INITIALIZER that is making isSupported() sync for DI may not
+    // be done evaulating by the time we inject from the TestBed. We can
+    // ensure correct behavior by waiting for the (global) isSuppported() promise
+    // to resolve.
+    isSupported().then(() => done());
+  });
+
+  describe('single injection', () => {
+
+    beforeEach(() => {
+        appName = rando();
+        TestBed.configureTestingModule({
+            imports: [
+                provideFirebaseApp(() => initializeApp(COMMON_CONFIG, appName)),
+                provideAnalytics(() => {
+                    providedAnalytics = getAnalytics(getApp(appName));
+                    return providedAnalytics;
+                }),
+            ],
+        });
+        app = TestBed.inject(FirebaseApp);
+        analytics = TestBed.inject(Analytics);
+    });
+
+    afterEach(() => {
+        deleteApp(app).catch(() => undefined);
+    });
+
+    it('should be injectable', () => {
+        expect(providedAnalytics).toBeTruthy();
+        expect(analytics).toEqual(providedAnalytics);
+        expect(analytics.app).toEqual(app);
+    });
+
+  });
+
+});

src/analytics/overrides.ts

@@ -0,0 +1,3 @@
+import { ɵisAnalyticsSupportedFactory } from '@angular/fire';
+
+export const isSupported = ɵisAnalyticsSupportedFactory.async;

src/analytics/screen-tracking.service.ts

@@ -1,16 +1,14 @@
-import { Inject, ComponentFactoryResolver, Injectable, NgZone, OnDestroy, Optional, Injector } from '@angular/core';
+import { ComponentFactoryResolver, Injectable, NgZone, OnDestroy, Optional, Injector } from '@angular/core';
 import { of, Subscription, Observable } from 'rxjs';
 import { distinctUntilChanged, filter, groupBy, map, mergeMap, pairwise, startWith, switchMap } from 'rxjs/operators';
 import { ActivationEnd, Router, ɵEmptyOutletComponent } from '@angular/router';
 import { Title } from '@angular/platform-browser';
 import { VERSION } from '@angular/fire';
-import { FirebaseApp } from '@angular/fire/app';
 import { registerVersion } from 'firebase/app';
 
 import { Analytics } from './analytics';
-import { logEvent } from './firebase';
+import { logEvent, isSupported } from './firebase';
 import { UserTrackingService } from './user-tracking.service';
-import { analyticsInstanceFactory, defaultAnalyticsInstanceFactory, isSupportedPromiseSymbol, PROVIDED_ANALYTICS_INSTANCE_FACTORIES } from './analytics.module';
 
 const FIREBASE_EVENT_ORIGIN_KEY = 'firebase_event_origin';
 const FIREBASE_PREVIOUS_SCREEN_CLASS_KEY = 'firebase_previous_class';
@@ -153,28 +151,23 @@ export class ScreenTrackingService implements OnDestroy {
     componentFactoryResolver: ComponentFactoryResolver,
     zone: NgZone,
     @Optional() userTrackingService: UserTrackingService,
-    firebaseApp: FirebaseApp,
-    @Inject(PROVIDED_ANALYTICS_INSTANCE_FACTORIES) analyticsInstanceFactories: Array<(injector: Injector) => Analytics>,
     injector: Injector,
   ) {
     registerVersion('angularfire', VERSION.full, 'screen-tracking');
-    if (!router) { return this; }
-    // Analytics is not ready to be injected yet, as the APP_INITIALIZER hasn't evulated yet, do this the hard way
-    const analyticsInstance: Promise<Analytics|null> = globalThis[isSupportedPromiseSymbol].then((isSupported: boolean) => {
-      const analyticsInstances = analyticsInstanceFactories.map(fn => analyticsInstanceFactory(fn)(zone, isSupported, injector));
-      return defaultAnalyticsInstanceFactory(isSupported, analyticsInstances, firebaseApp);
-    });
-    zone.runOutsideAngular(() => {
-      this.disposable = ɵscreenViewEvent(router, title, componentFactoryResolver).pipe(
-        switchMap(async params => {
-          if (userTrackingService) {
-            await userTrackingService.initialized;
-          }
-          const analytics = await analyticsInstance;
-          if (!analytics) { return; }
-          return logEvent(analytics, SCREEN_VIEW_EVENT, params);
-        })
-      ).subscribe();
+    // The APP_INITIALIZER that is making isSupported() sync for the sake of convenient DI
+    // may not be done when services are initialized. Guard the functionality by first ensuring
+    // that the (global) promise has resolved, then get Analytics from the injector.
+    isSupported().then(() => {
+      const analytics = injector.get(Analytics);
+      if (!router || !analytics) { return; }
+      zone.runOutsideAngular(() => {
+        this.disposable = ɵscreenViewEvent(router, title, componentFactoryResolver).pipe(
+          switchMap(async params => {
+            if (userTrackingService) { await userTrackingService.initialized; }
+            return logEvent(analytics, SCREEN_VIEW_EVENT, params);
+          })
+        ).subscribe();
+      });
     });
   }
 

src/analytics/user-tracking.service.ts

@@ -1,41 +1,43 @@
-import { Inject, Injectable, Injector, NgZone, OnDestroy } from '@angular/core';
-import { Analytics } from './analytics';
+import { Injectable, Injector, NgZone, OnDestroy } from '@angular/core';
 import { Subscription } from 'rxjs';
 import { VERSION } from '@angular/fire';
 import { Auth, authState } from '@angular/fire/auth';
 import { registerVersion } from 'firebase/app';
-import { setUserId } from './firebase';
-import { analyticsInstanceFactory, defaultAnalyticsInstanceFactory, isSupportedPromiseSymbol, PROVIDED_ANALYTICS_INSTANCE_FACTORIES } from './analytics.module';
-import { FirebaseApp } from '@angular/fire/app';
+
+import { Analytics } from './analytics';
+import { setUserId, isSupported } from './firebase';
 
 @Injectable()
 export class UserTrackingService implements OnDestroy {
 
   public readonly initialized: Promise<void>;
-  private readonly disposables: Array<Subscription> = [];
+  private disposables: Array<Subscription> = [];
 
   constructor(
     auth: Auth,
     zone: NgZone,
-    @Inject(PROVIDED_ANALYTICS_INSTANCE_FACTORIES) analyticsInstanceFactories: Array<(injector: Injector) => Analytics>,
     injector: Injector,
-    firebaseApp: FirebaseApp,
   ) {
     registerVersion('angularfire', VERSION.full, 'user-tracking');
-    // Analytics is not ready to be injected yet, as the APP_INITIALIZER hasn't evulated yet, do this the hard way
-    const analyticsInstance: Promise<Analytics|null> = globalThis[isSupportedPromiseSymbol].then((isSupported: boolean) => {
-      const analyticsInstances = analyticsInstanceFactories.map(fn => analyticsInstanceFactory(fn)(zone, isSupported, injector));
-      return defaultAnalyticsInstanceFactory(isSupported, analyticsInstances, firebaseApp);
-    });
     let resolveInitialized: () => void;
     this.initialized = zone.runOutsideAngular(() => new Promise(resolve => { resolveInitialized = resolve; }));
-    this.disposables = [
-      // TODO add credential tracking back in
-      authState(auth).subscribe(user => {
-        analyticsInstance.then(analytics => analytics && setUserId(analytics, user?.uid));
+    // The APP_INITIALIZER that is making isSupported() sync for the sake of convenient DI
+    // may not be done when services are initialized. Guard the functionality by first ensuring
+    // that the (global) promise has resolved, then get Analytics from the injector.
+    isSupported().then(() => {
+      const analytics = injector.get(Analytics);
+      if (analytics) {
+        this.disposables = [
+          // TODO add credential tracking back in
+          authState(auth).subscribe(user => {
+            setUserId(analytics, user?.uid);
+            resolveInitialized();
+          }),
+        ];
+      } else {
         resolveInitialized();
-      }),
-    ];
+      }
+    });
   }
 
   ngOnDestroy() {

src/app-check/app-check.spec.ts

@@ -0,0 +1,43 @@
+import { TestBed } from '@angular/core/testing';
+import { FirebaseApp, provideFirebaseApp, getApp, initializeApp, deleteApp } from '@angular/fire/app';
+import { Auth, provideAuth, getAuth, connectAuthEmulator } from '@angular/fire/auth';
+import { COMMON_CONFIG } from '../test-config';
+import { rando } from '../utils';
+
+describe('Auth', () => {
+  let app: FirebaseApp;
+  let auth: Auth;
+  let providedAuth: Auth;
+  let appName: string;
+
+  describe('single injection', () => {
+
+    beforeEach(() => {
+        appName = rando();
+        TestBed.configureTestingModule({
+            imports: [
+                provideFirebaseApp(() => initializeApp(COMMON_CONFIG, appName)),
+                provideAuth(() => {
+                    providedAuth = getAuth(getApp(appName));
+                    connectAuthEmulator(providedAuth, 'http://localhost:9099');
+                    return providedAuth;
+                }),
+            ],
+        });
+        app = TestBed.inject(FirebaseApp);
+        auth = TestBed.inject(Auth);
+    });
+
+    afterEach(() => {
+        deleteApp(app).catch(() => undefined);
+    });
+
+    it('should be injectable', () => {
+        expect(auth).toBeTruthy();
+        expect(auth).toEqual(providedAuth);
+        expect(auth.app).toEqual(app);
+    });
+
+  });
+
+});

src/app/app.spec.ts

@@ -0,0 +1,37 @@
+import { TestBed } from '@angular/core/testing';
+import { FirebaseApp, provideFirebaseApp, initializeApp, deleteApp } from '@angular/fire/app';
+import { COMMON_CONFIG } from '../test-config';
+import { rando } from '../utils';
+
+describe('FirebaseApp', () => {
+  let app: FirebaseApp;
+  let providedApp: FirebaseApp;
+  let appName: string;
+
+  describe('single injection', () => {
+
+    beforeEach(() => {
+        appName = rando();
+        TestBed.configureTestingModule({
+            imports: [
+                provideFirebaseApp(() => {
+                    providedApp = initializeApp(COMMON_CONFIG, appName);
+                    return providedApp;
+                })
+            ],
+        });
+        app = TestBed.inject(FirebaseApp);
+    });
+
+    afterEach(() => {
+        deleteApp(app).catch(() => undefined);
+    });
+
+    it('should be injectable', () => {
+        expect(app).toBeTruthy();
+        expect(app).toEqual(providedApp);
+    });
+
+  });
+
+});