How to override a bad extensions controllers?

Question

Synopsis

I am trying to extend an admin controller of a module, however the frontend router and adminhtml router share the same frontname. I've tried so many things and none of them are working.

Extension router example

 <admin>
    <routers>
        <AdvancedStock>
            <use>admin</use>
            <args>
                <module>MDN_AdvancedStock</module>
                <frontName>AdvancedStock</frontName>
            </args>
        </AdvancedStock>
    </routers>
</admin>

... snip ...

<frontend>
    <routers>
        <AdvancedStock>
            <use>standard</use>
            <args>
                <module>MDN_AdvancedStock</module>
                <frontName>AdvancedStock</frontName>
            </args>
        </AdvancedStock>
    </routers>
</frontend>

Attempts

Attempt 1

<admin>
    <routers>
        <Vendor_AdvancedStock>
            <args>
                <modules>
                    <Vendor_AdvancedStock before="MDN_AdvancedStock">Vendor_AdvancedStock</Vendor_AdvancedStock>
                </modules>
            </args>
        </Vendor_AdvancedStock>
    </routers>
</admin>

Attempt 2

<frontend>
    <routers>
        <Vendor_AdvancedStock>
            <args>
                <modules>
                    <Vendor_AdvancedStock before="MDN_AdvancedStock">Vendor_AdvancedStock</Vendor_AdvancedStock>
                </modules>
            </args>
        </Vendor_AdvancedStock>
    </routers>
</frontend>

Attempt 3

This was attempt 1 and attempt 2 combined.

Attempt 4

<frontend>
    <routers>
        <AdvancedStock> <!-- this is the original vendors tag -->
            <args>
                <modules>
                    <Vendor_AdvancedStock before="MDN_AdvancedStock">Vendor_AdvancedStock</Vendor_AdvancedStock>
                </modules>
            </args>
        </AdvancedStock>
    </routers>
</frontend>

---

I have even added the depends tag and tried the above attempts with no success.

Answer 1

Try this:

<admin>
    <routers>
        <advancedstock> <!-- put there the router key of the original module -->
            <args>
                <modules>
                    <Vendor_AdvancedStock before="MDN_AdvancedStock">Vendor_AdvancedStock</Vendor_AdvancedStock>
                </modules>
            </args>
        </advancedstock>
    </routers>
</admin>

Then place your controller inside Vendor/AdvancedStock/controllers and make sure it's called the same as the original controller.

Answer 2

<admin>
        <routers>
            <advancedstock> <!-- assume advancedstock is routers of  MDN_AdvancedStock   -->
                <args>
                    <modules>
                        <Vendor_AdvancedStock before="MDN_AdvancedStock">Vendor_AdvancedStock_Adminhtml</Vendor_AdvancedStock>
                    </modules>
                </args>
            </advancedstock>
        </routers>
    </admin>

Vendor_AdvancedStock_Adminhtml is admincontroller dir of module Vendor_AdvancedStock

Answer 3

Ya I was waiting for marius to answer this question. He did it as I expected. I need to mention one more thing along with his answer. You need to call that "bad controller" just above your controller definition. That is

File :Vendor/AdvancedStock/controllers/ProductController.php

<?php    
require_once(Mage::getModuleDir('controllers','MDN_AdvancedStock').DS.'ProductController.php');
class Vendor_AdvancedStock_ProductController extends MDN_AdvancedStock_ProductController
{
     // some code
}

I told so because, as per my knowledge magento will not include the class that you are going to rewrite, if that class stands for a controller. For block rewrite, helper rewrite you may not require this step. Since magento will do that job for us.