public function index(Request $request)
{
$now = new Carbon();
if ($request->isMethod('post')) {
$from = new Carbon($request->input('from', $now->toDateString()));
$to = new Carbon($request->input('to', $now->toDateString()));
$lessons = \App\Lesson::orderBy('given_at', 'asc')->where('given_at', '>=', $from->startOfDay()->toDateTimeString())->where('given_at', '<=', $to->endOfDay()->toDateTimeString())->get();
} else {
$lessons = \App\Lesson::orderBy('given_at', 'asc')->get();
}
$groups = \App\CustomerGroup::orderBy('groupname', 'desc')->get();
return view('lesson.index')->with(['lessons' => $lessons, 'groups' => $groups, 'now' => $now->toDateString(), 'from' => isset($from) ? $from->toDateString() : '', 'to' => isset($to) ? $to->toDateString() : '']);
}
