2FAuth/app/Api/v1/Requests/SettingUpdateRequest.php

<?php

namespace App\Api\v1\Requests;

use App\Rules\IsValidEmailList;
use App\Rules\IsValidRegex;
use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Support\Facades\Auth;

class SettingUpdateRequest extends FormRequest
{
    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize()
    {
        return Auth::check();
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
        $routeParam = $this->route()?->parameter('settingName');

        if ($routeParam == 'restrictList') {
            $rule = [
                'value' => [
                    new IsValidEmailList,
                ],
            ];
        }
        else if ($routeParam == 'restrictRule') {
            $rule = [
                'value' => [
                    new IsValidRegex,
                ],
            ];
        }
        else {
            $rule = [
                'value' => [
                    'required',
                ],
            ];
        }

        return $rule;
    }
}