CourseWork/app/Services/GradeService.php

<?php

namespace App\Services;

use App\Models\Grade;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Pagination\LengthAwarePaginator;

class GradeService implements ServiceInterface
{

    public function getAll(): LengthAwarePaginator
    {
        return Grade::filter()->paginate(5)->withQueryString();
    }

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

    public function update(Model $model, array $data): Grade
    {
        $model->update($data);

        return $model;
    }

    public function delete($model): void
    {
        $model->delete();
    }
}