diff --git a/src/app/auth/auth.service.ts b/src/app/auth/auth.service.ts
new file mode 100644
index 0000000..c16d795
--- /dev/null
+++ b/src/app/auth/auth.service.ts
@@ -0,0 +1,37 @@
+import {Injectable} from "@angular/core";
+import {BehaviorSubject, from} from "rxjs";
+import {AngularFirestore} from "@angular/fire/firestore";
+import {AngularFireAuth} from "@angular/fire/auth";
+import {auth} from 'firebase';
+import {Router} from "@angular/router";
+import {flatMap, map, skip} from 'rxjs/operators';
+import {User} from './user';
+
+@Injectable({
+    providedIn: 'root'
+})
+export class AuthService {
+    readonly collection = 'Users';
+
+    user = new BehaviorSubject<User>(null);
+
+    constructor(private afAuth: AngularFireAuth, private router: Router, private db: AngularFirestore) {
+        this.afAuth.user.pipe(
+            flatMap((user: any) => {
+                if(!user) return from([false]);
+                let ref = this.db.collection(this.collection).doc(user.uid);
+                return ref.valueChanges().pipe(map(dbUser => Object.assign({ref: ref}, user, dbUser)))
+            })
+        ).subscribe(user => this.user.next(<User>user));
+    }
+
+    async loginWithGoogle() {
+        this.afAuth.auth.signInWithPopup(new auth.GoogleAuthProvider());
+        return this.user.pipe(skip(1));
+    }
+
+    async logout() {
+        await this.afAuth.auth.signOut();
+        return this.router.navigate(['/']);
+    }
+}
diff --git a/src/app/auth/guards/admin.guard.ts b/src/app/auth/guards/admin.guard.ts
new file mode 100644
index 0000000..2de4ad4
--- /dev/null
+++ b/src/app/auth/guards/admin.guard.ts
@@ -0,0 +1,17 @@
+import {CanActivate, Router} from '@angular/router';
+import {Injectable} from '@angular/core';
+import {Observable} from 'rxjs';
+import {filter, map, tap} from 'rxjs/operators';
+import {AuthService} from '../auth.service';
+
+@Injectable({
+    providedIn: 'root'
+})
+export class AdminGuard implements CanActivate {
+
+    constructor(private auth: AuthService, private router: Router) {}
+
+    canActivate(): Observable<boolean> {
+        return this.auth.user.pipe(filter((user: any) => user != null), map(user => user && user.isAdmin));
+    }
+}
diff --git a/src/app/auth/guards/guest.guard.ts b/src/app/auth/guards/guest.guard.ts
new file mode 100644
index 0000000..70c1629
--- /dev/null
+++ b/src/app/auth/guards/guest.guard.ts
@@ -0,0 +1,17 @@
+import {CanActivate, Router} from '@angular/router';
+import {Injectable} from '@angular/core';
+import {Observable} from 'rxjs';
+import {filter, map, tap} from 'rxjs/operators';
+import {AuthService} from '../auth.service';
+
+@Injectable({
+    providedIn: 'root'
+})
+export class GuestGuard implements CanActivate {
+
+    constructor(private auth: AuthService, private router: Router) {}
+
+    canActivate(): Observable<boolean> {
+        return this.auth.user.pipe(filter((user: any) => user != null), map(user => user && user.isAnonymous), tap(auth => auth ? this.router.navigate(['/']) : null));
+    }
+}
diff --git a/src/app/auth/guards/login.guard.ts b/src/app/auth/guards/login.guard.ts
new file mode 100644
index 0000000..ddb6896
--- /dev/null
+++ b/src/app/auth/guards/login.guard.ts
@@ -0,0 +1,17 @@
+import {CanActivate, Router} from '@angular/router';
+import {Injectable} from '@angular/core';
+import {Observable} from 'rxjs';
+import {filter, map, tap} from 'rxjs/operators';
+import {AuthService} from '../auth.service';
+
+@Injectable({
+    providedIn: 'root'
+})
+export class LoginGuard implements CanActivate {
+
+    constructor(private auth: AuthService, private router: Router) {}
+
+    canActivate(): Observable<boolean> {
+        return this.auth.user.pipe(filter((user: any) => user != null), map(user => user && !user.isAnonymous), tap(auth => auth ? null : this.router.navigate(['/login'])));
+    }
+}
diff --git a/src/app/auth/user.ts b/src/app/auth/user.ts
new file mode 100644
index 0000000..2dbd4b8
--- /dev/null
+++ b/src/app/auth/user.ts
@@ -0,0 +1,9 @@
+import {User as FirebaseUser} from "firebase"
+import {AngularFirestoreDocument} from '@angular/fire/firestore';
+
+export interface User extends FirebaseUser {
+    ref?: AngularFirestoreDocument;
+
+    isAdmin: boolean;
+    battery: string;
+}