cssd-back/app/Http/Requests/StorePackageRequest.php

<?php

namespace App\Http\Requests;

use App\Rules\ValidateItemOwnership;
use Illuminate\Foundation\Http\FormRequest;

class StorePackageRequest extends FormRequest
{
    public function authorize()
    {
        if ($this->method() == 'POST') {
            return true;
        } else {
            $Package = $this->route('Package');
            return auth('api')->check() && $Package && auth('api')->user()->can('update', $Package);
        }
    }

    public function rules()
    {
        switch ($this->method()) {
            case 'POST': {
                return [
                    'name' => 'required|max:250',
                    'note' => 'nullable',
                    'items' => 'required|array|min:1',
                    'items.*' => ['exists:items,id','integer',new ValidateItemOwnership()],
                ];
                break;
            }
            case 'PUT':
            case 'PATCH': {
                $Package =  $this->route('Package');
                return [
                    'name' => 'required|max:250',
                    'note' => 'nullable',
                    'items' => 'required|array|min:1',
                    'items.*' => ['exists:items,id','integer',new ValidateItemOwnership()],
                ];
                break;

            }
            default:
                break;
        }

    }

}