sfp_api_laravel_serprati/app/Services/CategoryService.php

<?php

namespace App\Services;

use App\Models\Category;
use Illuminate\Database\Eloquent\Collection;

class CategoryService
{
    public function getAll(?string $type = null): Collection
    {
        return Category::when($type, fn($q) => $q->where('type', $type))
            ->orderBy('name')
            ->get();
    }

    public function findById(int $id): ?Category
    {
        return Category::find($id);
    }

    public function create(array $data): Category
    {
        return Category::create($data);
    }

    public function update(int $id, array $data): ?Category
    {
        $model = $this->findById($id);

        if (!$model) {
            return null;
        }

        $model->update($data);
        return $model->fresh();
    }

    public function delete(int $id): bool
    {
        $model = $this->findById($id);

        if (!$model) {
            return false;
        }

        return $model->delete();
    }
}