feat(functions): Support region configuration via FunctionsRegionToken

Author: jamesdaniels

src/core/firebase.app.module.ts

@@ -31,7 +31,7 @@ export class FirebaseApp implements app.App {
     storage: (storageBucket?: string) => FirebaseStorage;
     delete: () => Promise<void>;
     firestore: () => FirebaseFirestore;
-    functions: () => FirebaseFunctions;
+    functions: (region?: string) => FirebaseFunctions;
 }
 
 export function _firebaseAppFactory(options: FirebaseOptions, nameOrConfig?: string | FirebaseAppConfig) {

src/functions/functions.spec.ts

@@ -1,7 +1,7 @@
 import { ReflectiveInjector, Provider } from '@angular/core';
 import { TestBed, inject } from '@angular/core/testing';
 import { FirebaseApp, FirebaseOptionsToken, AngularFireModule, FirebaseNameOrConfigToken } from '@angular/fire';
-import { AngularFireFunctions, AngularFireFunctionsModule } from '@angular/fire/functions';
+import { AngularFireFunctions, AngularFireFunctionsModule, FunctionsRegionToken } from '@angular/fire/functions';
 import { COMMON_CONFIG } from './test-config';
 
 describe('AngularFireFunctions', () => {
@@ -50,7 +50,8 @@ describe('AngularFireFunctions with different app', () => {
       ],
       providers: [
         { provide: FirebaseNameOrConfigToken, useValue: FIREBASE_APP_NAME_TOO },
-        { provide: FirebaseOptionsToken, useValue: COMMON_CONFIG }
+        { provide: FirebaseOptionsToken, useValue: COMMON_CONFIG },
+        { provide: FunctionsRegionToken, useValue: 'asia-northeast1' },
       ]
     });
     inject([FirebaseApp, AngularFireFunctions], (app_: FirebaseApp, _fns: AngularFireFunctions) => {
@@ -70,6 +71,10 @@ describe('AngularFireFunctions with different app', () => {
       expect(afFns instanceof AngularFireFunctions).toEqual(true);
     });
 
+    it('should have the Firebase Functions instance', () => {
+      expect(afFns.functions).toBeDefined();
+    });
+
   });
 
 });

src/functions/functions.ts

@@ -1,11 +1,11 @@
-import { Injectable, Inject, Optional, NgZone, PLATFORM_ID } from '@angular/core';
+import { Injectable, Inject, Optional, NgZone, PLATFORM_ID, InjectionToken } from '@angular/core';
 import { Observable, from } from 'rxjs';
 import { map } from 'rxjs/operators';
-
 import { FirebaseOptions, FirebaseAppConfig } from '@angular/fire';
-
 import { FirebaseFunctions, FirebaseOptionsToken, FirebaseNameOrConfigToken, _firebaseAppFactory, FirebaseZoneScheduler } from '@angular/fire';
 
+export const FunctionsRegionToken = new InjectionToken<string>('angularfire2.functions.region');
+
 @Injectable()
 export class AngularFireFunctions {
 
@@ -20,13 +20,14 @@ export class AngularFireFunctions {
     @Inject(FirebaseOptionsToken) options:FirebaseOptions,
     @Optional() @Inject(FirebaseNameOrConfigToken) nameOrConfig:string|FirebaseAppConfig|undefined,
     @Inject(PLATFORM_ID) platformId: Object,
-    zone: NgZone
+    zone: NgZone,
+    @Optional() @Inject(FunctionsRegionToken) region:string|undefined
   ) {
     this.scheduler = new FirebaseZoneScheduler(zone, platformId);
 
     this.functions = zone.runOutsideAngular(() => {
       const app = _firebaseAppFactory(options, nameOrConfig);
-      return app.functions();
+      return app.functions(region);
     });
 
   }