/**
  * Display a listing of the resource.
  *
  * @return Response
  */
 public function index()
 {
     //
     $employees = Employee::all();
     $query = Request::query();
     $employees = $employees->filter(function ($employee) use($query) {
         foreach ($query as $filter => $value) {
             if ($filter == 'location') {
                 if ($employee->locations->contains(Location::find($value))) {
                     continue;
                 } else {
                     return false;
                 }
             }
             if ($employee->{$filter} != $value) {
                 return false;
             }
         }
         return true;
     });
     return $employees;
 }