Laravel 4.1 - Sentry 2 User group access/permission - laravel-4

Question

I'am building my project using Laravel 4.1 with Sentry 2 as authorization and authentication package.
I've managed to log users in, register them and assign proper user groups.
I have 3 user groups:
Administrator
Presenter
Registered
I want to achieve 2 things:
Administrators and Presenters can have access to the Administration Panel. Users don't.
Restrict views in Administration Panel for Presenters. I want them to see only few views (links), for example only Schedule.
I've never used roles before and this is first time i use Sentry 2. That's why i'd like to ask for some help. Some point, how to start. How can i achieve both?

Answer 1

For more general permission checks I would look at inGroup() helper:
// Find the user using the user id
$user = Sentry::findUserByID(1);
// Find the Administrator group
$admin = Sentry::findGroupByName('Administrator');
// Check if the user is in the administrator group
if ($user->inGroup($admin)) {
// User is in Administrator group
} else {
// User is not in Administrator group
}

Answer 2

Define permission for all groups.
check this tutorial https://cartalyst.com/manual/sentry/users/helpers
and focus on hasAccess($permission) and hasAnyAccess($permissions)

Answer 3

in filter.php
/**
* hasAcces filter (permissions)
*
* Check if the user has permission (group/user)
*/
Route::filter('hasAccess', function($route, $request, $value)
{
try {
$user = Sentry::getUser();
if( ! $user->hasAccess($value)) {
if(Sentry::check())
return Redirect::to('portal')->with('message', 'No Access.');
else
return Redirect::to('registration#login')->with('message', 'No Access.');
}
} catch (Cartalyst\Sentry\Users\UserNotFoundException $e) {
if(Sentry::check())
return Redirect::to('portal')->with('message', 'User not found.');
else
return Redirect::to('registration#login')->with('message', 'User not found.');
}
});
/**
* InGroup filter
*
* Check if the user belongs to a group
*/
Route::filter('inGroup', function($route, $request, $value) {
try {
$user = Sentry::getUser();
$group = Sentry::findGroupByName($value);
if( ! $user->inGroup($group)) {
if(Sentry::check())
return Redirect::to('portal')->with('message', 'No Access.');
else
return Redirect::to('registration#login')->with('message', 'No Access.');
}
} catch (Cartalyst\Sentry\Users\UserNotFoundException $e) {
if(Sentry::check())
return Redirect::to('portal')->with('message', 'User not found.');
else
return Redirect::to('registration#login')->with('message', 'User not found.');
} catch (Cartalyst\Sentry\Groups\GroupNotFoundException $e) {
if(Sentry::check())
return Redirect::to('portal')->with('message', 'Group not found.');
else
return Redirect::to('registration#login')->with('message', 'Group not found.');
}
});
Routes ->
Route::group(array( 'before' => 'Sentry|inGroup:Administrators'), function() {
Route::get('manageusers', array('as' => 'manageusers', 'uses' => 'UserController#viewUsersList'));
});