qimall/addons/UpgradeGift/common/logic/order/OrderValidateLogic.php

<?php

namespace addons\UpgradeGift\common\logic\order;

use addons\UpgradeGift\common\logic\order\validate\OrderValidateInterface;
use addons\UpgradeGift\common\logic\order\validate\UpgradeGiftValidate;

class OrderValidateLogic
{

    /**
     * @var OrderValidateInterface[]
     */
    protected static $handlers = [
        UpgradeGiftValidate::class
    ];

    /**
     * @param BaseOrderForm $form
     *
     * @return string|true
     */
    public static function run(BaseOrderForm $form)
    {
        try {
            if (!empty(self::$handlers)) {
                foreach (self::$handlers as $handler) {
                    (new $handler())->valid($form);
                }
            }
        } catch (\Exception $e) {
            return $e->getMessage();
        }
        return true;
    }
}