sfp_api_laravel_serprati/app/Http/Requests/UserDependentRequest.php

<?php

namespace App\Http\Requests;

use App\Enums\KinshipEnum;
use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Validation\Rule;

class UserDependentRequest extends FormRequest
{
    protected function prepareForValidation(): void
    {
        $user = $this->user();

        if ($user?->isAssociado()) {
            $this->merge(['responsible_user_id' => $user->id]);
        }
    }

    public function rules(): array
    {
        $rules = [
            'responsible_user_id' => 'sometimes|integer|exists:users,id',
            'name'                => 'sometimes|string|max:255',
            'kinship'             => ['sometimes', Rule::enum(KinshipEnum::class)],
        ];

        if ($this->isMethod('post')) {
            $rules['responsible_user_id'] = 'required|integer|exists:users,id';
            $rules['name']                = 'required|string|max:255';
            $rules['kinship']             = ['required', Rule::enum(KinshipEnum::class)];
            $rules['document']            = 'required|file|mimes:jpg,jpeg,png,webp,pdf|max:10240';
        }

        return $rules;
    }
}