public UserManagerViewmodel(IAuthenticationService authenticationService)
{
_authenticationService = authenticationService;
Groups = new ObservableCollection <GroupViewmodel>(authenticationService.Groups.Select(g =>
{
var newVm = new GroupViewmodel(g);
newVm.Load();
return(newVm);
}));
Users = new ObservableCollection <UserViewmodel>(authenticationService.Users.Select(u =>
{
var newVm = new UserViewmodel(u, this);
newVm.Load();
return(newVm);
}));
CommandAddUser = new UICommand {
ExecuteDelegate = AddUser
};
CommandDeleteUser = new UICommand {
ExecuteDelegate = DeleteUser, CanExecuteDelegate = CanDeleteUser
};
CommandAddGroup = new UICommand {
ExecuteDelegate = AddGroup
};
CommandDeleteGroup = new UICommand {
ExecuteDelegate = DeleteGroup, CanExecuteDelegate = CanDeleteGroup
};
authenticationService.UsersOperation += AuthenticationService_UsersOperation;
authenticationService.GroupsOperation += AuthenticationService_GroupsOperation;
}
private void AddGroup(object obj)
{
var newVm = new GroupViewmodel(_authenticationService.CreateGroup());
Groups.Add(newVm);
SelectedGroup = newVm;
}
private void AuthenticationService_GroupsOperation(object sender, CollectionOperationEventArgs <IGroup> e)
{
Application.Current.Dispatcher.BeginInvoke((Action) delegate
{
var vm = Groups.FirstOrDefault(u => u.Model == e.Item);
if (e.Operation == CollectionOperation.Add)
{
if (vm == null)
{
vm = new GroupViewmodel(e.Item);
vm.Load();
Groups.Add(vm);
}
}
else
{
if (vm != null)
{
Groups.Remove(vm);
vm.Dispose();
}
}
});
}