feat: add internship date fields and business day calculation to career applications

app/Filament/Admin/Resources/CareerApplications/Schemas/CareerApplicationForm.php

@@ -6,6 +6,7 @@ use Filament\Forms\Components\FileUpload;
 use Filament\Forms\Components\Select;
 use Filament\Forms\Components\Textarea;
 use Filament\Forms\Components\TextInput;
+use Filament\Forms\Components\DatePicker;
 use Filament\Schemas\Components\Section;
 use Filament\Schemas\Schema;
 use Illuminate\Support\Facades\Hash;
@@ -94,8 +95,53 @@ class CareerApplicationForm
                             ->directory('signed_interns')
                             ->downloadable()
                             ->nullable(),
+
+                        DatePicker::make('internship_start_date')
+                            ->label('Staj Başlangıç Tarihi')
+                            ->live()
+                            ->afterStateUpdated(fn ($state, $get, Set $set) => self::calculateTotalDays($state, $get('internship_end_date'), $set))
+                            ->nullable(),
+                        
+                        DatePicker::make('internship_end_date')
+                            ->label('Staj Bitiş Tarihi')
+                            ->live()
+                            ->afterStateUpdated(fn ($state, $get, Set $set) => self::calculateTotalDays($get('internship_start_date'), $state, $set))
+                            ->nullable(),
+
+                        TextInput::make('internship_total_days')
+                            ->label('Toplam Staj Süresi (İş Günü)')
+                            ->numeric()
+                            ->disabled()
+                            ->dehydrated()
+                            ->nullable(),
                     ])
                     ->columnSpanFull(),
             ]);
     }
+
+    public static function calculateTotalDays($start, $end, Set $set): void
+    {
+        if (!$start || !$end) {
+            $set('internship_total_days', null);
+            return;
+        }
+
+        $startDate = \Carbon\Carbon::parse($start);
+        $endDate = \Carbon\Carbon::parse($end);
+
+        if ($startDate->gt($endDate)) {
+            $set('internship_total_days', 0);
+            return;
+        }
+
+        $days = 0;
+        while ($startDate->lte($endDate)) {
+            if (!$startDate->isWeekend()) {
+                $days++;
+            }
+            $startDate->addDay();
+        }
+
+        $set('internship_total_days', $days);
+    }
 }

app/Http/Controllers/CareerController.php

@@ -136,11 +136,18 @@ class CareerController extends Controller
 
         $request->validate([
             'internship_form' => 'required|file|mimes:pdf,docx,jpg,png,jpeg|max:51200',
+            'internship_start_date' => 'required|date',
+            'internship_end_date' => 'required|date|after_or_equal:internship_start_date',
         ], [
             'internship_form.required' => 'Lütfen bir dosya seçin.',
             'internship_form.file' => 'Yüklenen öğe geçerli bir dosya olmalıdır.',
             'internship_form.mimes' => 'Yalnızca PDF, DOCX, JPG ve PNG formatındaki dosyalar kabul edilir.',
             'internship_form.max' => 'Dosya boyutu en fazla 50MB olabilir.',
+            'internship_start_date.required' => 'Lütfen staj başlangıç tarihini girin.',
+            'internship_start_date.date' => 'Geçerli bir başlangıç tarihi girin.',
+            'internship_end_date.required' => 'Lütfen staj bitiş tarihini girin.',
+            'internship_end_date.date' => 'Geçerli bir bitiş tarihi girin.',
+            'internship_end_date.after_or_equal' => 'Bitiş tarihi, başlangıç tarihinden önce olamaz.',
         ]);
 
         $intern = CareerApplication::findOrFail(session('intern_id'));
@@ -152,11 +159,27 @@ class CareerController extends Controller
             }
 
             $path = $request->file('internship_form')->store('to_be_signed_interns', 'public');
+
+            // Calculate business days (excluding weekends)
+            $startDate = \Carbon\Carbon::parse($request->internship_start_date);
+            $endDate = \Carbon\Carbon::parse($request->internship_end_date);
+            $days = 0;
+            $tempDate = $startDate->copy();
+            while ($tempDate->lte($endDate)) {
+                if (!$tempDate->isWeekend()) {
+                    $days++;
+                }
+                $tempDate->addDay();
+            }
+
             $intern->update([
-                'to_be_signed_internship_form_path' => $path
+                'to_be_signed_internship_form_path' => $path,
+                'internship_start_date' => $request->internship_start_date,
+                'internship_end_date' => $request->internship_end_date,
+                'internship_total_days' => $days,
             ]);
 
-            return redirect()->back()->with('success', 'İmzalanacak staj formunuz başarıyla yüklendi.');
+            return redirect()->back()->with('success', 'İmzalanacak staj formunuz ve staj tarihleri başarıyla kaydedildi.');
         }
 
         return redirect()->back()->with('error', 'Dosya yüklenirken bir hata oluştu.');

app/Models/CareerApplication.php

@@ -25,6 +25,9 @@ class CareerApplication extends Model
         'password',
         'signed_internship_form_path',
         'to_be_signed_internship_form_path',
+        'internship_start_date',
+        'internship_end_date',
+        'internship_total_days',
     ];
 
     /**