app/Filament/Resources/VehicleEntryResource.php

@@ -6,6 +6,7 @@ use App\Filament\Resources\VehicleEntryResource\Pages;
 use App\Filament\Resources\VehicleEntryResource\RelationManagers;
 use App\Models\Plant;
 use App\Models\VehicleEntry;
+use Carbon\Carbon;
 use Filament\Facades\Filament;
 use Filament\Forms;
 use Filament\Forms\Form;
@@ -40,12 +41,36 @@ class VehicleEntryResource extends Resource
                     ->required(),
                 Forms\Components\DateTimePicker::make('entry_time')
                     ->label('Entry Time')
-                    ->required(),
+                    ->required()
+                    ->afterStateUpdated(function ($state, callable $get, callable $set) {
+                        $exitTime = $get('exit_time');
+
+                        if ($state && $exitTime) {
+                            $duration = Carbon::parse($exitTime)
+                                ->diff(Carbon::parse($state))
+                                ->format('%H:%I:%S');
+
+                            $set('duration', $duration);
+                        }
+                    }),
                 Forms\Components\DateTimePicker::make('exit_time')
                     ->label('Exit Time')
-                    ->required(),
+                    ->required()
+                    ->reactive()
+                    ->afterStateUpdated(function ($state, callable $get, callable $set) {
+                        $entryTime = $get('entry_time');
+
+                        if ($state && $entryTime) {
+                            $duration = Carbon::parse($state)
+                                ->diff(Carbon::parse($entryTime))
+                                ->format('%H:%I:%S');
+
+                            $set('duration', $duration);
+                        }
+                    }),
                 Forms\Components\TextInput::make('duration')
                     ->label('Duration')
+                    ->readOnly()
                     ->required(),
                 Forms\Components\TextInput::make('type')
                     ->label('Type')