Eloquent conditional query based on database-field

Hi,

I have a table like this:

+----+------------------+-----------+
| id | mail_domain      | type      |
+----+------------------+-----------+
|  1 | my_app.test      | EQ        |
|  2 | another_app.test | ENDS_WITH |
+----+------------------+-----------+

I want to query this table depending on field type like this

if 'type' == 'EQ'
Model::where('mail_domain' , $search)

if 'type' == 'ENDS_WITH'
Model::where('mail_domain', 'like', '%' . $search)

I know, I can use when() but the documentation only tells about some condition based on a variable:

$role = $request->input('role');

$users = DB::table('users')
                ->when($role, function ($query, $role) {
                    return $query->where('role_id', $role);
                })
                ->get();

How can I relate the when() to a database-field instead of an separate variable?