# How to check user rights

Rights and groups can be managed in the `Rechteverwaltung` module.

The IDs for each user right can be found in `UserRightsConst.cs`. Always use these constants instead of the id itself.

## In viewmodels (Centron.WPF.UI)

In viewmodels it's quite easy to check for user rights:

``` csharp
CentronCache.Instance.CurrentUserAppRights.Any(f => f.I3D == UserRightsConst.T);
```

## For modules

Checking if an user has access to a module in `ModuleRegistration.cs` can be done via the first overload on:
``` csharp
ModuleRegistrationItem.For<TController>(() => Helper.HasRights(UserRightsConst.T))
```

## In BL (Centron.BL)

To check out user rights in BLs simply call `AppRightsBL.CheckRightsFromUser(currentUserI3D, your rightids)` then check if the result contains the necessary right.

``` csharp
var checkRightsResult = new AppRightsBL(Session).CheckRightsFromUser(currentUserI3D, new List<int>
{
    UserRightsConst.Sales.Customer.CustomerCommon.CREATE_CUSTOMER,
    UserRightsConst.Sales.Customer.CustomerCommon.EDIT_CUSTOMER,
    UserRightsConst.Sales.Customer.CustomerCommon.DELETE_CUSTOMER,
    UserRightsConst.Sales.Customer.CustomerCommon.SEARCH_CUSTOMER,
    UserRightsConst.Sales.Customer.CustomerCommon.UNLOCK_CUSTOMER
});
```
Then check via:
``` csharp
if (checkRightsResult.Contains(UserRightsConst.Sales.Customer.CustomerCommon.CREATE_CUSTOMER) == false)
{
    return Result.AsError("Fehlende Rechte um Accounts zu erstellen");
}
```
(from `AccountBL.cs`)