finished the upgrade to filament 4. completely revamped the frontend with codex, now it looks great!

app/Filament/Pages/GlobalSettings.php

@@ -2,41 +2,44 @@
 
 namespace App\Filament\Pages;
 
-use App\Models\Setting;
 use App\Services\PrinterService;
+use App\Settings\GeneralSettings;
+use BackedEnum;
 use Filament\Forms\Components\Select;
 use Filament\Forms\Components\TextInput;
 use Filament\Forms\Components\Toggle;
 use Filament\Forms\Concerns\InteractsWithForms;
 use Filament\Forms\Contracts\HasForms;
-use Filament\Forms\Form;
 use Filament\Notifications\Notification;
 use Filament\Pages\Page;
+use Filament\Schemas\Schema;
 use Illuminate\Support\Arr;
+use UnitEnum;
 
 class GlobalSettings extends Page implements HasForms
 {
     use InteractsWithForms;
 
-    protected static ?string $navigationIcon = 'heroicon-o-cog';
-    protected static string $view = 'filament.pages.global-settings';
-    protected static ?string $navigationGroup = 'Admin';
+    protected static string|BackedEnum|null $navigationIcon = 'heroicon-o-cog';
+
+    protected string $view = 'filament.pages.global-settings';
+
+    protected static string|UnitEnum|null $navigationGroup = 'Admin';
 
     public ?array $data = [];
 
-    public function mount(): void
+    public function mount(GeneralSettings $settings): void
     {
-        $settings = Setting::all()->pluck('value', 'key')->toArray();
-        $this->form->fill($settings);
+        $this->form->fill($settings->toArray());
     }
 
-    public function form(Form $form): Form
+    public function form(Schema $schema): Schema
     {
-        $printerService = new PrinterService();
+        $printerService = new PrinterService;
         $printers = $printerService->getPrinters();
         $printerOptions = array_merge($printers, ['__custom__' => __('filament.resource.setting.form.custom_printer')]);
 
-        return $form
+        return $schema
             ->schema([
                 TextInput::make('gallery_heading')
                     ->label(__('filament.resource.setting.form.gallery_heading'))
@@ -66,18 +69,21 @@ class GlobalSettings extends Page implements HasForms
             ->statePath('data');
     }
 
-    public function save(): void
+    public function save(GeneralSettings $settings): void
     {
         $data = $this->form->getState();
 
-        // if a non-custom printer is selected, clear the custom address
         if (Arr::get($data, 'selected_printer') !== '__custom__') {
-            $data['custom_printer_address'] = '';
+            $data['custom_printer_address'] = null;
         }
 
-        foreach ($data as $key => $value) {
-            Setting::where('key', $key)->update(['value' => $value]);
-        }
+        $data['new_image_timespan_minutes'] = (int) Arr::get($data, 'new_image_timespan_minutes', 0);
+        $data['image_refresh_interval'] = (int) Arr::get($data, 'image_refresh_interval', 0);
+        $data['max_number_of_copies'] = (int) Arr::get($data, 'max_number_of_copies', 0);
+        $data['show_print_button'] = (bool) Arr::get($data, 'show_print_button', false);
+        $data['custom_printer_address'] = $data['custom_printer_address'] ?: null;
+
+        $settings->fill($data)->save();
 
         Notification::make()
             ->title(__('settings.saved_successfully'))