Alert admin when order is made with a specific payment method

Question

We currently have, on our site, the option to make payment either by credit card or Bank transfer. We would like a way for the admin to receive an alert email when payment is made using the Bank transfer method. We can get the system to send an email every time an order is made but we'd like to send a specific one, just for Bank transfer orders.

Is there a way to do this?

Thank you.

Answer 1

There are many different ways to do this. One way is to make an after plugin for place order like this:

app/code/StackExchange/BankTransferNotify/etc/di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd"
>
    <type name="Magento\Quote\Api\CartManagementInterface">
        <plugin type="StackExchange\BankTransferNotify\Plugin\NotifyAdminOnBankTransfer" name="NotifyAdminOnBankTransfer" />
    </type>
</config>

app/code/StackExchange/BankTransferNotify/etc/module.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
    <module name="StackExchange_BankTransferNotify" setup_version="0.1.0">
    </module>
</config>

app/code/StackExchange/BankTransferNotify/Plugin/NotifyAdminOnBankTransfer.php

<?php
declare(strict_types=1);

namespace StackExchange\BankTransferNotify\Plugin;

use Magento\OfflinePayments\Model\Banktransfer;
use Magento\Quote\Api\CartManagementInterface;
use Magento\Sales\Api\OrderRepositoryInterface;

class NotifyAdminOnBankTransfer
{
    /**
     * @var OrderRepositoryInterface
     */
    private OrderRepositoryInterface $orderRepository;

    public function __construct(
        OrderRepositoryInterface $orderRepository
    ) {
        $this->orderRepository = $orderRepository;
    }

    public function afterPlaceOrder(CartManagementInterface $cartManagement, $orderId)
    {
        $order = $this->orderRepository->get($orderId);

        if ($order->getPayment()->getMethod() == Banktransfer::PAYMENT_METHOD_BANKTRANSFER_CODE) {
            //
            // Send Email here......
            //
        }

        return $orderId;
    }
}

app/code/StackExchange/BankTransferNotify/registration.php

<?php
\Magento\Framework\Component\ComponentRegistrar::register(
    \Magento\Framework\Component\ComponentRegistrar::MODULE,
    'StackExchange_BankTransferNotify',
    __DIR__
);

Enable module

Run setup upgrade

Good luck!