Added login routes guard

src/app/app-routing.module.ts

@@ -5,6 +5,7 @@ import { HomeComponent } from './home/home.component';
 import { LoginComponent } from './login/login.component';
 import { DashboardComponent } from './dashboard/dashboard.component';
 import { CanActivateRoutesGuard } from './can-activate-routes.guard';
+import { CanActivateLoginRoutesGuard } from './can-activate-login-routes.guard';
 
 const routes: Routes = [
   {
@@ -14,11 +15,13 @@ const routes: Routes = [
   },
   {
     path: 'home',
-    component: HomeComponent
+    component: HomeComponent,
+    canActivate: [CanActivateLoginRoutesGuard]
   },
   {
     path: 'login',
-    component: LoginComponent
+    component: LoginComponent,
+    canActivate: [CanActivateLoginRoutesGuard]
   },
   {
     path: 'dashboard',
@@ -30,6 +33,6 @@ const routes: Routes = [
 @NgModule({
   imports: [RouterModule.forRoot(routes)],
   exports: [RouterModule],
-  providers: [CanActivateRoutesGuard]
+  providers: [CanActivateRoutesGuard, CanActivateLoginRoutesGuard]
 })
 export class AppRoutingModule {}

src/app/can-activate-login-routes.guard.spec.ts

@@ -0,0 +1,16 @@
+import { CanActivateLoginRoutesGuard } from './can-activate-login-routes.guard';
+import { inject, TestBed } from '@angular/core/testing';
+import { RouterTestingModule } from '@angular/router/testing';
+
+describe('CanActivateLoginRoutesGuard', () => {
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      imports: [RouterTestingModule],
+      providers: [CanActivateLoginRoutesGuard]
+    });
+  });
+
+  it('should create an instance', inject([CanActivateLoginRoutesGuard], (guard: CanActivateLoginRoutesGuard) => {
+    expect(guard).toBeTruthy();
+  }));
+});

src/app/can-activate-login-routes.guard.ts

@@ -0,0 +1,17 @@
+import { CanActivate, Router } from '@angular/router';
+import { Injectable } from '@angular/core';
+import { AuthService } from './auth.service';
+import { Observable } from 'rxjs';
+
+@Injectable()
+export class CanActivateLoginRoutesGuard implements CanActivate {
+  constructor(private authService: AuthService, private router: Router) {}
+
+  public canActivate(): Observable<boolean> | Promise<boolean> | boolean {
+    if (this.authService.isSignedIn()) {
+      this.router.navigate(['/dashboard']);
+      return false;
+    }
+    return true;
+  }
+}