datetime-duration-challenge/app/Http/Requests/CalculateDurationRequest.php

<?php

namespace App\Http\Requests;

use App\Enums\DurationModifier;
use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Validation\Rules\Enum;

class CalculateDurationRequest extends FormRequest
{
    public function authorize(): bool
    {
        return true;
    }

    public function rules(): array
    {
        return [
            'start.date' => ['required', 'date_format:Y-m-d'],
            'start.timezone' => ['nullable', 'timezone:all'],
            'end.date' => ['required', 'date_format:Y-m-d'],
            'end.timezone' => ['nullable', 'timezone:all'],
            'convert_to' => ['nullable', new Enum(DurationModifier::class)],
        ];
    }
}