public void UpdateContacts(IEnumerable <IContact> addedContacts, IEnumerable <IContact> changedContacts)
{
foreach (var contact in addedContacts)
{
bool add = false;
var user = contact as IUser;
var group = contact as IGroup;
if (user != null && (user.Relation == UserRelation.Friend || user.Relation == UserRelation.PendingFriend))
{
add = true;
}
else if (group != null && group.Joined)
{
add = true;
}
if (add)
{
contactVMs.Add(ContactViewModel.Create(client, contact));
}
}
foreach (var contact in changedContacts)
{
bool remove = false;
var user = contact as IUser;
var group = contact as IGroup;
if (user != null)
{
switch (user.Relation)
{
case UserRelation.None:
remove = true;
break;
// Don't include ourselves in any lists
case UserRelation.Me:
continue;
// Add any users who just became our friends
case UserRelation.Friend:
case UserRelation.PendingFriend:
if (contactVMs.SingleOrDefault(_ => _.Contact == contact) == null)
{
contactVMs.Add(ContactViewModel.Create(client, contact));
}
break;
}
}
if (user != null && user.Relation == UserRelation.None)
{
remove = true;
}
else if (group != null && !group.Joined)
{
remove = true;
}
if (remove)
{
var vm = contactVMs.SingleOrDefault(_ => _.Contact == contact);
if (vm != null)
{
contactVMs.Remove(vm);
}
}
}
contactsView.Refresh();
NotifyPropertyChanged("Contacts");
NotifyPropertyChanged("ContactsView");
}