sfp_api_laravel_diarista/app/Http/Requests/UserAppsRequest.php

<?php

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;
use App\Enums\{
  UserTypeEnum,
  LanguageEnum
};
use Illuminate\Validation\Rule;

class UserAppsRequest extends FormRequest
{
  public function rules(): array
  {
    $rules = [
      'email' => 'sometimes|email',
      'phone' => 'sometimes|string|nullable',
    ];

    if (!$this->has('email')) {
      $rules['phone'] = 'required|string|max:20';
      $rules['email'] = 'nullable';
    }
    if (!$this->has('phone')) {
      $rules['email'] = 'required|email';
      $rules['phone'] = 'nullable';
    }

    return $rules;
  }
}