magento 如何在跳转到支付界面前自动发送邮件

在magento系统中，默认是在支付成功后发送确认订单邮件的，但是有时我们会碰到支付不成功的情况或者客户不想支付，那我们怎样才能在支付前就发送订单邮件呢？首先我们打开appcodecoreMageCheckoutModelType文件夹下的Onepage.php文件，找到saveOrder()方法，可以看到有这么几句：

        $order = $service->getOrder();
        if ($order) {
            Mage::dispatchEvent('checkout_type_onepage_save_order_after', array('order'=>$order, 'quote'=>$this->getQuote()));

            /**
             * a flag to set that there will be redirect to third party after confirmation
             * eg: paypal standard ipn
             */
            $redirectUrl = $this->getQuote()->getPayment()->getOrderPlaceRedirectUrl();
            /**
             * we only want to send to customer about new order when there is no redirect to third party
             */
            if(!$redirectUrl){
                try {
                    $order->sendNewOrderEmail();
                } catch (Exception $e) {
                    Mage::logException($e);
                }
            }

            // add order information to the session
            $this->_checkoutSession->setLastOrderId($order->getId())
                ->setRedirectUrl($redirectUrl)
                ->setLastRealOrderId($order->getIncrementId());

            // as well a billing agreement can be created
            $agreement = $order->getPayment()->getBillingAgreement();
            if ($agreement) {
                $this->_checkoutSession->setLastBillingAgreementId($agreement->getId());
            }
        }

可以发现magento系统是在保存订单数据后就立即跳转到支付URL上去了，而如果没有支付跳转，则会发送邮件。那我们现在就可以把
            if(!$redirectUrl){
                try {
                    $order->sendNewOrderEmail();
                } catch (Exception $e) {
                    Mage::logException($e);
                }
            }

中的if条件注释掉，这样就可以保证无论是否存在支付跳转，系统都会发送订单确认邮件。