erpsaas/app/Filament/Company/Resources/Core/DepartmentResource.php

<?php

namespace App\Filament\Company\Resources\Core;

use App\Filament\Company\Resources\Core\DepartmentResource\Pages;
use App\Models\Core\Department;
use Filament\Forms\Form;
use Filament\Resources\Resource;
use Filament\Tables\Table;
use Filament\{Forms, Tables};

class DepartmentResource extends Resource
{
    protected static ?string $model = Department::class;

    protected static ?string $navigationIcon = 'heroicon-o-square-3-stack-3d';

    protected static ?string $navigationGroup = 'HR';

    protected static ?string $slug = 'hr/departments';

    public static function form(Form $form): Form
    {
        return $form
            ->schema([
                Forms\Components\Section::make('General')
                    ->schema([
                        Forms\Components\TextInput::make('name')
                            ->autofocus()
                            ->required()
                            ->maxLength(100),
                        Forms\Components\Select::make('manager_id')
                            ->label('Manager')
                            ->relationship('manager', 'name')
                            ->searchable()
                            ->preload()
                            ->placeholder('Select a manager')
                            ->nullable(),
                        Forms\Components\Group::make()
                            ->schema([
                                Forms\Components\Select::make('parent_id')
                                    ->label('Parent Department')
                                    ->relationship('parent', 'name')
                                    ->preload()
                                    ->searchable()
                                    ->nullable(),
                                Forms\Components\Textarea::make('description')
                                    ->label('Description')
                                    ->autosize()
                                    ->nullable(),
                            ])->columns(1),
                    ])->columns(),
            ]);
    }

    public static function table(Table $table): Table
    {
        return $table
            ->columns([
                Tables\Columns\TextColumn::make('name')
                    ->weight('semibold')
                    ->searchable()
                    ->sortable(),
                Tables\Columns\TextColumn::make('manager.name')
                    ->label('Manager')
                    ->searchable()
                    ->sortable(),
            ])
            ->filters([
                //
            ])
            ->actions([
                Tables\Actions\EditAction::make(),
            ])
            ->bulkActions([
                Tables\Actions\BulkActionGroup::make([
                    Tables\Actions\DeleteBulkAction::make(),
                ]),
            ]);
    }

    public static function getRelations(): array
    {
        return [
            //
        ];
    }

    public static function getPages(): array
    {
        return [
            'index' => Pages\ListDepartments::route('/'),
            'create' => Pages\CreateDepartment::route('/create'),
            'edit' => Pages\EditDepartment::route('/{record}/edit'),
        ];
    }
}