Add a comment to an order on Magento after backend javascript action with XMLHTTPRequest

Question

I'm working on a custom module for Magento CE 1.9.1 and i need to add a comment to an order after a javascript function is triggered (clicking on a button). I thought to do this using an AJAX/XMLHTTPRequest call, pointing to a php file that has a code similar to this.

From what I understood I can't use a general php file like I thought, but instead I need to use a Controller (tell me if I'm wrong).

I created a basic controller on the module I was working, applying those changes:

/app/code/local/test/testModule/etc/config.xml

<config>
    <!--...-->
    <admin>
        <routers>
            <adminhtml>
                <args>
                    <modules>
                        <test_testModule after="Mage_Adminhtml">test_testModule</test_testModule>
                    </modules>
                </args>
            </adminhtml>
        </routers>
    </admin>
    <!--...-->
</config>

/app/code/local/test/testModule/controllers/IndexController.php

<?php
class test_testModule_IndexController extends Mage_Adminhtml_Controller_Action
{
    public function indexAction()
    {
        $this->loadLayout();
        $this->renderLayout();
    }


}  

And nothing else. All the other code hasn't been touched. To call the controller I followed the answer given by Louis Bataillard on this thread, so

Mage::helper('adminhtml')->getUrl('adminhtml/testModule/index/');

I know the controller by now shouldn't really do anything, but I keep getting an error 302 which should be wrong.

Do you have any tip or a better idea about how to do this?

Edit: I've managed to make the controller work, modifying the module name from testModule to testmodule and the controller name from IndexController to testmoduleController.

Now in my Javascript I have

<script>
/* ... */
    var tempPath = "<?php echo Mage::helper('adminhtml')->getUrl('adminhtml/testmodule/index/'); ?>"+"?isAjax=true";
    var addcomment = new XMLHttpRequest();
    var commentParameters = "orderID="+<?php echo $_order->getId(); ?>+"&supplier="+chosenSupplier;
    addcomment.open("post", tempPath, true);
    addcomment.setRequestHeader("Content-type","application/x-www-form-urlencoded");
    addcomment.send(commentParameters);
</script>

And in my controller, into indexAction

    public function indexAction()
            {
            //$orderID=$_POST['orderID'];
            //$supplier=$_POST['supplier'];
            $orderID=4882;
            $_order = Mage::getModel('sales/order')->load($orderID);
            $_order->addStatusToHistory($_order->getStatus(), 'TEST FROM INDEXACTION, false);
            $_order->save();
    }

As you can see right now I'm loading a static order, but I the code to get the content I need is the one on the two commented rows above.

Now when I call the controller from the javascript I get an answer 200 but nothing happens , meanwhile when I call directly the controller from the URL it works and adds a comment. Any idea about what is the problem here?

Note: I get the 200 only because I added the ?isAjax=true, otherwise I would still get a 302.

Edit2: I'm not sure this is the appropriate way to do it, but I found a workaround.

I've passed from a POST to a GET. This way I have to pass the parameters into the url, so this is how I modified the javascript:

<script>
    /* ... */
    var tempPath= "<?php echo Mage::helper('adminhtml')->getUrl('adminhtml/helloworld/comment/'); ?>"+"?isAjax=true"+"&orderID="+<?php echo $_order->getId(); ?>+"&supplier="+chosenSupplier;
    var addcomment = new XMLHttpRequest();
    addcomment.open("get", tempPath, true);
    addcomment.setRequestHeader("Content-type","application/x-www-form-urlencoded");
    addcomment.send();
</script>

And, into the testmoduleController, I've modified this:

    public function indexAction()
{
    $orderID=$_GET['orderID'];
    $supplier=$_GET['supplier'];
    $_order = Mage::getModel('sales/order')->load($orderID);
    $_order->addStatusToHistory($_order->getStatus(), 'TEST FROM INDEXACTION; supplier:'.$supplier, false);
    $_order->save();
}

I'm leaving the question open, so you can tell me if there is another (a better) way to do this

Answer 1

You have to create your own custom module.I guess you have good idea about creating an module and observer and event handling.

Config.xml file Path :- app\code\local\Wired\Orders\etc

<?xml version="1.0"?>
<config>
<modules>
    <Wired_Orders>
        <version>0.1.0</version>
    </Wired_Orders>
</modules>
<global>
    <models>
        <orders>
            <class>Wired_Orders_Model</class>
        </orders>
    </models>
    <helpers>
        <orders>
            <class>Wired_Orders_Helper</class>
        </orders>
    </helpers>
    <events>
        <checkout_submit_all_after>
            <observers>
                <change_order_status>
                    <class>orders/observer</class>
                    <method>CodeOrdeStatus</method>
                </change_order_status>
            </observers>
        </checkout_submit_all_after>
    </events>
 </global>   

Observer.php file Path :- app\code\local\Wired\Orders\Model

<?php
class Wired_Orders_Model_Observer extends Varien_Event_Observer
{
   public function CodeOrdeStatus($observer){

     $order = $observer->getEvent()->getOrder();
     $order=Mage::getModel('sales/order')->load($order->getId());
     // what ever the condition you used to update the comment
     if(**you condition**):

     //Method 1
     $order->setStatus("**Your Status**");//What ever the text you want to update with order status.
           //OR you can use like this

     //Method 2
      $order->addStatusToHistory('complete', 'Put your comment here', false);
     $order->save(); 
     endif;
}
}

module xml(Wired_Orders.xml) file Path : - \app\etc\modules

<?xml version="1.0" encoding="utf-8"?>
<config>
<modules>
    <Wired_Orders>
        <active>true</active>
        <codePool>local</codePool>
    </Wired_Orders>
</modules>

Hope you can get an idea from this coding part and customize your code accodring to your need.