feat(functions): Allow configuration of Functions Emulator Origin (#2017)

* Allow use of Cloud Functions emulator via FUNCTIONS_ORIGIN DI token
* Rearranged DI docs and added emulator origin
* Export FUNCTIONS_REGION as an alternative to FunctionsRegionToken

Author: jamesdaniels

docs/functions/functions.md

@@ -26,29 +26,6 @@ import { environment } from '../environments/environment';
 export class AppModule {}
 ```
 
-### Configure the Function region with the FunctionsRegionToken Injection Token
-
-Allow configuration of Function region with the `FunctionsRegionToken` Injection Token by adding it to the `providers` section of your `NgModule`. The default is `us-central1`.
-
-```ts
-import { NgModule } from '@angular/core';
-import { AngularFireFunctionsModule, FunctionsRegionToken } from '@angular/fire/functions';
-
-@NgModule({
-  imports: [
-    ...
-    AngularFireFunctionsModule,
-    ...
-  ],
-  ...
-  providers: [
-   { provide: FunctionsRegionToken, useValue: 'asia-northeast1' }
-  ]
-})
-export class AppModule {}
-
-```
-
 ### Injecting the AngularFireFunctions service
 
 Once the `AngularFireFunctionsModule` is registered you can inject the `AngularFireFunctions` service.
@@ -91,3 +68,51 @@ export class AppComponent {
 ```
 
 Notice that calling `httpsCallable()` does not initiate the request. It creates a function, which when called creates an Observable, subscribe or convert it to a Promise to initiate the request.
+
+## Configuration via Dependency Injection
+
+### Functions Region
+
+Allow configuration of the Function's region by adding `FUNCTIONS_REGION` to the `providers` section of your `NgModule`. The default is `us-central1`.
+
+```ts
+import { NgModule } from '@angular/core';
+import { AngularFireFunctionsModule, FUNCTIONS_REGION } from '@angular/fire/functions';
+
+@NgModule({
+  imports: [
+    ...
+    AngularFireFunctionsModule,
+    ...
+  ],
+  ...
+  providers: [
+   { provide: FUNCTIONS_REGION, useValue: 'asia-northeast1' }
+  ]
+})
+export class AppModule {}
+
+```
+
+### Cloud Functions emulator
+
+Point callable Functions to the Cloud Function emulator by adding `FUNCTIONS_ORIGIN` to the `providers` section of your `NgModule`.
+
+```ts
+import { NgModule } from '@angular/core';
+import { AngularFireFunctionsModule, FUNCTIONS_ORIGIN } from '@angular/fire/functions';
+
+@NgModule({
+  imports: [
+    ...
+    AngularFireFunctionsModule,
+    ...
+  ],
+  ...
+  providers: [
+   { provide: FUNCTIONS_ORIGIN, useValue: 'http://localhost:5005' }
+  ]
+})
+export class AppModule {}
+
+```

package.json

@@ -35,7 +35,7 @@
     "@angular/core": ">=6.0.0 <8",
     "@angular/platform-browser": ">=6.0.0 <8",
     "@angular/platform-browser-dynamic": ">=6.0.0 <8",
-    "firebase": ">= 5.5.0 <7",
+    "firebase": ">= 5.5.7 <7",
     "rxjs": "^6.0.0",
     "ws": "^3.3.2",
     "xhr2": "^0.1.4",

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, FunctionsRegionToken } from '@angular/fire/functions';
+import { AngularFireFunctions, AngularFireFunctionsModule, FUNCTIONS_REGION, FUNCTIONS_ORIGIN } from '@angular/fire/functions';
 import { COMMON_CONFIG } from './test-config';
 
 describe('AngularFireFunctions', () => {
@@ -51,7 +51,8 @@ describe('AngularFireFunctions with different app', () => {
       providers: [
         { provide: FirebaseNameOrConfigToken, useValue: FIREBASE_APP_NAME_TOO },
         { provide: FirebaseOptionsToken, useValue: COMMON_CONFIG },
-        { provide: FunctionsRegionToken, useValue: 'asia-northeast1' },
+        { provide: FUNCTIONS_ORIGIN, useValue: 'http://0.0.0.0:9999' },
+        { provide: FUNCTIONS_REGION, useValue: 'asia-northeast1' }
       ]
     });
     inject([FirebaseApp, AngularFireFunctions], (app_: FirebaseApp, _fns: AngularFireFunctions) => {

src/functions/functions.ts

@@ -4,7 +4,10 @@ import { map } from 'rxjs/operators';
 import { FirebaseOptions, FirebaseAppConfig } from '@angular/fire';
 import { FirebaseFunctions, FirebaseOptionsToken, FirebaseNameOrConfigToken, _firebaseAppFactory, FirebaseZoneScheduler } from '@angular/fire';
 
+// SEMVER: @ v6 remove FunctionsRegionToken in favor of FUNCTIONS_REGION
 export const FunctionsRegionToken = new InjectionToken<string>('angularfire2.functions.region');
+export const FUNCTIONS_ORIGIN = new InjectionToken<string>('angularfire2.functions.origin');
+export const FUNCTIONS_REGION = FunctionsRegionToken;
 
 @Injectable()
 export class AngularFireFunctions {
@@ -21,7 +24,8 @@ export class AngularFireFunctions {
     @Optional() @Inject(FirebaseNameOrConfigToken) nameOrConfig:string|FirebaseAppConfig|null|undefined,
     @Inject(PLATFORM_ID) platformId: Object,
     zone: NgZone,
-    @Optional() @Inject(FunctionsRegionToken) region:string|null
+    @Optional() @Inject(FUNCTIONS_REGION) region:string|null,
+    @Optional() @Inject(FUNCTIONS_ORIGIN) origin:string|null
   ) {
     this.scheduler = new FirebaseZoneScheduler(zone, platformId);
 
@@ -30,6 +34,10 @@ export class AngularFireFunctions {
       return app.functions(region || undefined);
     });
 
+    if (origin) {
+      this.functions.useFunctionsEmulator(origin);
+    }
+
   }
 
   public httpsCallable<T=any, R=any>(name: string) {

yarn.lock

@@ -1746,7 +1746,7 @@ dateformat@^3.0.0:
   resolved "https://registry.yarnpkg.com/dateformat/-/dateformat-3.0.3.tgz#a6e37499a4d9a9cf85ef5872044d62901c9889ae"
   integrity sha512-jyCETtSl3VMZMWeRo7iY1FL19ges1t55hMo5yaam4Jrsm5EPL89UQkoQRyiI+Yf4k8r2ZpdngkV8hr1lIdjb3Q==
 
-debug@2, debug@2.6.9, debug@^2.2.0, debug@^2.3.3, debug@^2.6.8, debug@^2.6.9, debug@~2.6.4, debug@~2.6.6, debug@~2.6.9:
+debug@2, debug@2.6.9, debug@^2.1.2, debug@^2.2.0, debug@^2.3.3, debug@^2.6.8, debug@^2.6.9, debug@~2.6.4, debug@~2.6.6, debug@~2.6.9:
   version "2.6.9"
   resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.9.tgz#5d128515df134ff327e90a4c93f4e077a536341f"
   integrity sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==
@@ -1760,7 +1760,7 @@ debug@3.1.0, debug@~3.1.0:
   dependencies:
     ms "2.0.0"
 
-debug@4, debug@^4.1.0:
+debug@4:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/debug/-/debug-4.1.1.tgz#3b72260255109c6b589cee050f1d516139664791"
   integrity sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==
@@ -2411,7 +2411,7 @@ fined@^1.0.1:
     object.pick "^1.2.0"
     parse-filepath "^1.0.1"
 
-"firebase@>= 5.5.0 <7":
+"firebase@>= 5.5.7 <7":
   version "6.0.2"
   resolved "https://registry.yarnpkg.com/firebase/-/firebase-6.0.2.tgz#a2d1daa9a3f329aac2974349d521fbd923ee0f35"
   integrity sha512-KA4VviZQJCzCIkCEvt3sJEsNe/HpqQdNE+ajy3wELHCxNV8PK8eBa10qxWDQhNgEtorHHltgYw3VwS0rbSvWrQ==
@@ -4523,11 +4523,16 @@ multipipe@^0.1.2:
   dependencies:
     duplexer2 "0.0.2"
 
-nan@^2.0.5, nan@^2.12.1, nan@^2.13.2:
+nan@^2.0.5, nan@^2.12.1:
   version "2.13.2"
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.13.2.tgz#f51dc7ae66ba7d5d55e1e6d4d8092e802c9aefe7"
   integrity sha512-TghvYc72wlMGMVMluVo9WRJc0mB8KxxF/gZ4YYFy7V2ZQX9l7rgbPg7vjS9mt6U5HXODVFVI2bOduCzwOMv/lw==
 
+nan@^2.13.2:
+  version "2.14.0"
+  resolved "https://registry.yarnpkg.com/nan/-/nan-2.14.0.tgz#7818f722027b2459a86f0295d434d1fc2336c52c"
+  integrity sha512-INOFj37C7k3AfaNTtX8RhsTw7qRy7eLET14cROi9+5HAVbbHuIWUHEauBv5qT4Av2tWasiTY1Jw6puUNqRJXQg==
+
 nan@~2.10.0:
   version "2.10.0"
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.10.0.tgz#96d0cd610ebd58d4b4de9cc0c6828cda99c7548f"
@@ -4566,11 +4571,11 @@ ncp@^2.0.0:
   integrity sha1-GVoh1sRuNh0vsSgbo4uR6d9727M=
 
 needle@^2.2.1:
-  version "2.3.1"
-  resolved "https://registry.yarnpkg.com/needle/-/needle-2.3.1.tgz#d272f2f4034afb9c4c9ab1379aabc17fc85c9388"
-  integrity sha512-CaLXV3W8Vnbps8ZANqDGz7j4x7Yj1LW4TWF/TQuDfj7Cfx4nAPTvw98qgTevtto1oHDrh3pQkaODbqupXlsWTg==
+  version "2.2.4"
+  resolved "https://registry.yarnpkg.com/needle/-/needle-2.2.4.tgz#51931bff82533b1928b7d1d69e01f1b00ffd2a4e"
+  integrity sha512-HyoqEb4wr/rsoaIDfTH2aVL9nWtQqba2/HvMv+++m8u0dz808MaagKILxtfeSN7QU7nvbQ79zk3vYOJp9zsNEA==
   dependencies:
-    debug "^4.1.0"
+    debug "^2.1.2"
     iconv-lite "^0.4.4"
     sax "^1.2.4"