feat(client): add auth-guard service

Author: Awk34

Diff for: templates/app/client/components/auth(auth)/auth-guard.service.js

@@ -0,0 +1,16 @@
+import { Injectable } from '@angular/core';
+import { CanActivate } from '@angular/router';
+
+import { AuthService } from './auth.service';
+
+@Injectable()
+export class AuthGuard implements CanActivate {
+    static parameters = [AuthService];
+    constructor(authService: AuthService) {
+        this.authService = authService;
+    }
+
+    canActivate() {
+        return this.authService.isLoggedIn();
+    }
+}