sfp_api_laravel_serprati/app/Http/Requests/EventRequest.php

<?php

namespace App\Http\Requests;

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

class EventRequest extends FormRequest
{
    public function rules(): array
    {
        $rules = [
            'title'       => 'sometimes|string|max:255',
            'description' => 'sometimes|nullable|string',
            'date'        => 'sometimes|nullable|date',
            'time'        => 'sometimes|nullable|date_format:H:i',
            'type'        => ['sometimes', Rule::enum(EventTypeEnum::class)],
            'order'       => 'sometimes|integer|min:0',
        ];

        if ($this->isMethod('post')) {
            $rules['title'] = 'required|string|max:255';
            $rules['type']  = ['required', Rule::enum(EventTypeEnum::class)];
        }

        return $rules;
    }
}