Hmm.. it's an interesting question that we haven't heard of. The way you'd likely do that is to setup a specific page on your site to host the add to Page Tab popup. In that page, create a custom Javascript module. We'd recommend using something like
Flexi Custom Code
(which is free and allows for Javascript). in that module, add:
<script>
jQuery(document).ready(function(){
FB.ui({
method: 'pagetab',
redirect_uri: 'YOUR_URL'
}, function(response){});
});
</script>Then, add that module to the special menu item you created in Joomla. That Javascript should automatically show the Add To Page popup whenever a user visits it. The YOUR_URL could be a good place for a separate "Thank you" page for the user that just added your App.
Test that page. Once it works, create a notification with a redirect URL to the page you created. Send and anyone that receives it should go to that page where the popup automatically appears.
I haven't tested that, and can't guarantee it will work, but hopefully it gets you started.
Should you have any other questions, just let me know!
Thanks,
Alex
FB Page Tab Dialog
