CheckoutRequest.php

<?php

namespace DeliveryUrbano\Http\Requests;

use Illuminate\Http\Request as HttpRequest;

class CheckoutRequest extends Request {

    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize() {
        return true;
    }

    /**
     * @param HttpRequest $request
     * @return array
     */
    public function rules(HttpRequest $request) {

        $rules = [];

        //dd($this->method());

        switch ($this->method()) {
            case 'DELETE': {
                    $rules = [
                        'id' => 'required'
                    ];
                break;
                }
            case 'POST': {
                
                    $rules = [
                        'cupom_code' => 'exists:cupoms,code,used,0'
                    ];
                    $this->buildRulesItems(0, $rules);
                    $items = $request->get('items', []);
                    $items = !is_array($items) ? [] : $items;
                    foreach ($items as $key => $val) {
                        $this->buildRulesItems($key, $rules);
                    }

                    break;

                }
            case 'PATCH': {
                $rules = [
                    'teste' => 'required'
                ];
                break;
            }
            default: {
                $rules = [
                    'teste'=>'required'
                ];
                break;
            }

        }

        return $rules;

    }

    public function buildRulesItems($key, array &$rules) {
        $rules["items.$key.product.id"] = 'required';
        $rules["items.$key.product.qtd"] = 'required';
        $rules["items.$key.product.price"] = 'required';
    }

}