How can we create custom capability for a member group so that we can check in our module and give access to it

Question

I am creating a module for a simple form submission. In admin, I am showing a table view of all entries. I have a specific member group "pitch" who can access only that module. In addition they can't access the "Export in CSV" functionality for listing. But super admin can do all things.

1. How can I create a custom privilege for "pitch" member group so that they can't access "Export" button.
2. OR hide button if "pitch" member login in CP
3. How can we do this through module?
4. Please provide a reference url or a piece of code.

Answer 1

You could use the add on CP CSS & JS to hide the button with CSS as you already suggest yourself. I know there are options to check for member privileges in add-ons but I don't know them off the top of my head.

Edit:

You could use this code in your module. More info:

if (ee()->session->userdata('group_id') == 1)
{
    exit('A Superadmin');
}