Auth Guard initial implementation

Commented out until routing is simplified

src/app/_guards/auth.guard.ts

@@ -0,0 +1,21 @@
+import { Injectable } from '@angular/core';
+import { Router, CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot } from '@angular/router';
+ 
+@Injectable()
+export class AuthGuard implements CanActivate {
+ 
+    constructor(private router: Router) { }
+ 
+    canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
+        if (localStorage.getItem('sessionKey')) {
+            console.log('session key found')
+			// logged in so return true
+            return true;
+        }
+ 
+        // not logged in so redirect to login page with the return url
+        console.log('no session key found')
+		this.router.navigate(['/login'], { queryParams: { returnUrl: state.url }});
+        return false;
+    }
+}

src/app/_guards/index.ts

@@ -0,0 +1 @@
+export * from './auth.guard';