ldc-crm/app/Http/Requests/Bo/CustomerExport.php

<?php

namespace App\Http\Requests\Bo;

use App\Enums\CustomerExportType;
use Illuminate\Foundation\Http\FormRequest;

class CustomerExport extends FormRequest
{
    /**
     * Determine if the user is authorized to make this request.
     *
     * @return boolean
     */
    public function authorize(): bool
    {
        return auth('backend')->check();
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules(): array
    {
        return [
            'brand'       => 'required|numeric|exists:brands,id',
            'export_type' => [
                'required',
                'numeric',
                // phpcs:ignore Generic.CodeAnalysis.UnusedFunctionParameter.FoundInExtendedClassBeforeLastUsed
                function ($attribute, $value, $fail) {
                    if (!\in_array($value, CustomerExportType::toValues())) {
                        $fail(trans('Le type d\'export invalide'));
                    }
                }
            ]
        ];
    }
}