first commit

src/app/_guards/auth.guard.ts

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+import { Injectable } from '@angular/core';
+import { Router, CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot } from '@angular/router';
+import { AuthService } from '../_services/auth.service';
+
+@Injectable()
+export class AuthGuard implements CanActivate {
+  constructor(private router: Router) {}
+
+  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
+    if (localStorage.getItem('currentUser')) {
+      // Logged in so return true
+
+      return true;
+    }
+
+    // Not logged in so redirect to login page with the return url
+    this.router.navigate(['/login'], { queryParams: { returnUrl: state.url } });
+    return false;
+  }
+}