fix(firebase): map jwt to psuedo user object on server

Author: patrickmichalina

src/modules/firebase/auth/server.auth.module.ts

@@ -19,7 +19,7 @@ function repairInlinePem(str?: string) {
 }
 
 export function fbAdminFactory(es: EnvironmentService) {
-  !firebaseAdminAppAlreadyExists &&
+  !firebaseAdminAppAlreadyExists() &&
     initializeApp({
       credential: credential.cert({
         projectId: es.config.FIREBASE_PROJECT_ID,

src/modules/firebase/auth/server.auth.service.ts

@@ -1,27 +1,59 @@
 import { Injectable, Inject } from '@angular/core'
 import {
   FIREBASE_AUTH_SERVER_ADMIN_APP,
-  FIREBASE_AUTH_SERVER_USER_JWT
+  FIREBASE_AUTH_SERVER_USER_JWT,
+  FIREBASE_AUTH_OBJ_TS
 } from './server.common'
 import { auth } from 'firebase-admin'
 import { of } from 'rxjs'
-import { flatMap } from 'rxjs/operators'
+import { flatMap, catchError, map, tap } from 'rxjs/operators'
+import { TransferState } from '@angular/platform-browser'
 
 function validateToken(auth: auth.Auth, jwt: string) {
   return of(auth.verifyIdToken(jwt))
 }
 
+function byMappingItToUndefined(err: any) {
+  return of(undefined)
+}
+
+function cacheToBrowser(ts: TransferState) {
+  return function(obj: any) {
+    ts.set(FIREBASE_AUTH_OBJ_TS, obj)
+  }
+}
+
+function toPsuedoUserObject(jwtObj: any) {
+  return {
+    isAnonymous: false, // TODO
+    uid: jwtObj.uid,
+    displayName: jwtObj.name,
+    email: jwtObj.email,
+    emailVerified: jwtObj.email_verified,
+    photoURL: jwtObj.picture,
+    phoneNumber: jwtObj.phone_number,
+    // providerData: '',
+    providerId: jwtObj.firebase && jwtObj.firebase.sign_in_provider
+  }
+}
+
 // tslint:disable:no-this
 // tslint:disable-next-line:no-class
 @Injectable()
 export class FirebaseServerAuth {
   constructor(
+    private ts: TransferState,
     @Inject(FIREBASE_AUTH_SERVER_ADMIN_APP) private authAdmin: auth.Auth,
     @Inject(FIREBASE_AUTH_SERVER_USER_JWT) private jwt: string
   ) {}
 
   readonly validatedToken_ = this.jwt
-    ? validateToken(this.authAdmin, this.jwt).pipe(flatMap(a => a))
+    ? validateToken(this.authAdmin, this.jwt).pipe(
+        flatMap(a => a),
+        map(toPsuedoUserObject),
+        tap(cacheToBrowser(this.ts)),
+        catchError(byMappingItToUndefined)
+      )
     : of(null)
 
   readonly user = this.validatedToken_

src/modules/firebase/auth/server.common.ts

@@ -1,9 +1,12 @@
 import { InjectionToken } from '@angular/core'
 import { auth } from 'firebase-admin'
+import { makeStateKey } from '@angular/platform-browser'
 
 export const FIREBASE_AUTH_SERVER_ADMIN_APP = new InjectionToken<auth.Auth>(
   'fng.fb.svr.auth.admin'
 )
 export const FIREBASE_AUTH_SERVER_USER_JWT = new InjectionToken<string>(
   'fng.fb.svr.auth.jwt'
 )
+
+export const FIREBASE_AUTH_OBJ_TS = makeStateKey('fng.fb.auth.ts')