public function index(Request $request)
 {
     $start_date = $request->get('start_date', null);
     $end_date = $request->get('end_date', null);
     $level = $request->get('level', null);
     $message = $request->get('message', null);
     $logs = Logger::where(function ($query) use($start_date) {
         if ($start_date != null) {
             $query->whereRaw("DATE(created_at) >= DATE('{$start_date}')");
         }
     })->where(function ($query) use($end_date) {
         if ($end_date != null) {
             $query->whereRaw("DATE(created_at) <= DATE('{$end_date}')");
         }
     })->where(function ($query) use($level) {
         if ($level != null) {
             $query->where("level_name", $level);
         }
     })->where(function ($query) use($message) {
         if ($message != null) {
             $query->where("message", $message);
         }
     })->orderBy('created_at', 'desc')->paginate(100);
     $messages = config('dblogger.messages');
     $levels = config('dblogger.levels');
     $channels = config('dblogger.channels');
     return view('dblogger-gui::index', compact('logs', 'messages', 'levels', 'level', 'message', 'start_date', 'end_date', 'channels'));
 }