added a package guard

projects/common/src/fm/services/package-guard.service.ts

@@ -0,0 +1,19 @@
+import {Injectable} from '@angular/core';
+import {ActivatedRouteSnapshot, CanActivate, RouterStateSnapshot} from '@angular/router';
+import {PackageService} from './package.service';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class PackageGuardService implements CanActivate {
+
+  constructor(private packageService: PackageService) { }
+
+  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): boolean {
+    return route.data && route.data.package && this.hasPackageForRoute(route.data.package);
+  }
+
+  private hasPackageForRoute(packageId: string): boolean {
+    return this.packageService.hasPackage(packageId);
+  }
+}