Support

Joomla allows you to give administrative powers to any user group for specific components, categories or even specific articles. Therefore the definition of a front-end "administrator" is very lax. If we were to generalise it to make it useful for everyone that would encompass any user logging into your site which beats the point of having this feature in the first place.

Please note that in your particular use case you might be able to define the "front-end administrator" as someone who belongs to specific user groups. The same may not apply for other people.

That's why we can't implement such a feature in a way which would be meaningful for everyone.

So, this is the thing that's not very clear :) What are the "parts of the site"? And what is "edit"? I will give you some examples.

Editing modules. This requires having the core.edit privilege either globally or in com_modules. You could say this is easy to determine by checking if you have such a privilege. But you'd actually have to check for all possible permissions giving "admin" privileges, whatever that is, both core and per-component and for each and every component. This starts becoming hairy since it requires a substantial amount of configuration: you have to tell Admin Tools which permissions are to be considered "admin" for each component.

Editing articles. Now, that's complicated. The permissions may be set globally, in com_content, in the category of the articles or just for that specific article. Moreover, there are two kinds of possible permissions, core.edit (edit any applicable article) or core.edit_own (only edit articles owned by you). Determining who is an "admin" is incredibly complicated: you would need to check the permissions for each and every article on your site. If you have 10 articles it's fast. If you have 100 it's becoming slow. At 1000 articles (half as much on our own, small, site) it's slowing down your site considerably. At 10,000 articles your sire no longer loads on most servers.

If you keep on following this line of thought you will see that providing a generally useful feature is not possible. The only thing one could do is send notification emails when specific user groups, selected by the user, log into the front-end of the site. The downside to that is that it's not something which can be automatically configured. You'd still need to tell it which user groups are considered "front-end admins".

OK, that makes more sense. You want to be notified when users belonging to a specific user group log into the site. I agree that using a third party plugin is the best approach.