feat: Implement Kosma selection and role management in general settings, refine Kosma permissions, and update the default semester value.

app/Filament/Pages/System/ManageSettings.php

@@ -2,7 +2,10 @@
 
 namespace App\Filament\Pages\System;
 
+use App\Enums\RoleEnum;
 use App\Filament\Support\SystemNotification;
+use App\Models\Student;
+use App\Models\User;
 use App\Settings\GeneralSettings;
 use BackedEnum;
 use BezhanSalleh\FilamentShield\Traits\HasPageShield;
@@ -59,6 +62,15 @@ public function form(Schema $schema): Schema
                             ->native(false)
                             ->required()
                             ->helperText('Tentukan semester yang sedang aktif saat ini. Semester ini akan digunakan untuk menyaring data yang relevan.'),
+
+                        Select::make('kosma_id')
+                            ->label('Kosma')
+                            ->placeholder('Pilih Mahasiswa sebagai Kosma')
+                            ->options(Student::query()->pluck('full_name', 'id'))
+                            ->searchable()
+                            ->preload()
+                            ->native(false)
+                            ->helperText('Pilih mahasiswa yang bertanggung jawab sebagai Kosma (Ketua Kelas).'),
                     ])
                     ->columns(2)
                     ->columnSpanFull(),
@@ -69,4 +81,20 @@ public function getSavedNotification(): ?Notification
     {
         return SystemNotification::update();
     }
+
+    protected function afterSave(): void
+    {
+        $settings = app(GeneralSettings::class);
+        $kosmaId = $settings->kosma_id;
+
+        User::role('Kosma')->get()->each(fn (User $user) => $user->removeRole('Kosma'));
+
+        if ($kosmaId) {
+            $student = Student::find($kosmaId);
+
+            if ($student?->user) {
+                $student->user->assignRole(RoleEnum::Kosma);
+            }
+        }
+    }
 }

app/Settings/GeneralSettings.php

@@ -8,6 +8,8 @@ class GeneralSettings extends Settings
 {
     public int $current_semester;
 
+    public ?int $kosma_id;
+
     public static function group(): string
     {
         return 'general';

database/seeders/ShieldSeeder.php

@@ -167,32 +167,10 @@ public function run(): void
                 "name": "Kosma",
                 "guard_name": "web",
                 "permissions" : [
-                    "ViewAny:Student",
-                    "View:Student",
-
-                    "ViewAny:Lecturer",
-                    "View:Lecturer",
-
-                    "ViewAny:Course",
-                    "View:Course",
-
-                    "ViewAny:CourseSchedule",
-                    "View:CourseSchedule",
-
-                    "ViewAny:Assignment",
-                    "View:Assignment",
-
-                    "ViewAny:Attendance",
-                    "View:Attendance",
                     "Create:Attendance",
                     "Update:Attendance",
                     "Delete:Attendance",
 
-                    "ViewAny:Material",
-                    "View:Material",
-
-                    "ViewAny:StudyGroup",
-                    "View:StudyGroup",
                     "Create:StudyGroup",
                     "Update:StudyGroup",
                     "Delete:StudyGroup"

database/settings/2026_03_11_220817_create_general_settings.php

@@ -6,6 +6,7 @@
 {
     public function up(): void
     {
-        $this->migrator->add('general.current_semester', 1);
+        $this->migrator->add('general.current_semester', 4);
+        $this->migrator->add('general.kosma_id', null);
     }
 };