Triggering an action on backend login

I'm currently working on some synchronisation stuff. I've already created Buttons n stuff in the Backend to trigger the synchronisation method and things work just fine, but I'd need a way to trigger the synchronisation as soon as a Backend user logs in, quite like the postLogin-Hook, just for the Backend.

I'd be glad if you could help me.
Thanks in advance
Chris

There were some comments below the contao hooks page.

You can do detection in your routine to determine if the login was from the FE or the BE.

Code:

---

public function postLogin($objUser)
{
    // Front end
    if (TL_MODE == 'FE')
    {

    }
       
    // Back end
    elseif (TL_MODE == 'BE')
    {

    }
}

---

Ok, thank you for the quick answer and the good code example, just one more question: How is this method triggered? Thats what i was actually looking for. Because as far as I know Contao executes the postLogin-Hook only when a Frontend-User logs in (or am I wrong with that?)

I am running Contao 2.9.2 on a Server2Go as my development-sandbox. Maybe this information can help you to help me :)

Thanks in advance
Chris

It does trigger on both, however it was only added to both later, not sure at which version. Look at the Contao Hooks page:
https://contao.org/en/hooks.html

Oh, I've found the Problem. In Contao 2.9.2 (the Version I'm using) the postLogin-Hook is only triggered on a frontend user's login. From Contao 2.10 and onwards it triggers on both, front- and backend login.

Thanks a lot for your Help, thyon!

Chris

Well, somehow it still doesn't work out...

Here's some of my code. I'd be glad if somebody'd have a look at it.

This is a part of my config.php

Code:

---

//Cron-Job und Login-Hook für synchro
$GLOBALS['TL_HOOKS']['postLogin'][] = array('Sync', 'synchronize');

---

And this is an extract of the Sync-Class:

Code:

---

class Sync extends Frontend
{
        function __construct()
        {
                parent::__construct();
        }

        public function synchronize($objUser=null)
        {

---

Am I diong this right?