public static void ProcessChanges <T>(DbChangeStatus status, T arg, ObservableCollection <T> collection, TaskFactory sync)
{
Logger.Log.Info($"Изменения в объекте: {{object: {typeof(T)}, status: {status}}}");
switch (status)
{
case DbChangeStatus.Add:
case DbChangeStatus.Update:
int index = collection.IndexOf(arg);
if (index > -1)
{
sync.StartNew(() =>
{
collection.RemoveAt(index);
collection.Insert(index, arg);
});
}
else
{
sync.StartNew(() => collection.Add(arg));
}
break;
case DbChangeStatus.Remove:
if (collection.Contains(arg))
{
sync.StartNew(() => collection.Remove(arg));
}
break;
default:
Logger.Log.Warn($"Необработанное событие изменения: {{type: {typeof(T)}, status: {status}}}");
break;
}
}
void ProcessChanges <T>(DbChangeStatus status, T arg, ObservableCollection <T> collection)
{
ProcessChangesHelper.ProcessChanges(status, arg, collection, sync);
if (status == DbChangeStatus.Remove && arg is Staff staff)
{
Clear(Groups, x => x.CuratorId == staff.Id);
}
}
private void Groups_OnChanged(DbChangeStatus status, Group group)
{
if (status != DbChangeStatus.Remove)
{
return;
}
if (selectedGroup.Id == group.Id)
{
sync.StartNew(() => GoBack());
}
}
private void Students_OnChanged(DbChangeStatus status, Student student)
{
int index = Items.IndexOf(student);
if (index > -1 && student.GroupId != Items[index].GroupId)
{
sync.StartNew(() => Items.Remove(student));
}
if (student.GroupId != selectedGroup.Id)
{
return;
}
ProcessChangesHelper.ProcessChanges(status, student, Items, sync);
}
private void Users_OnChanged(DbChangeStatus status, User arg)
{
ProcessChanges(status, arg, Users);
}
private void Staff_OnChanged(DbChangeStatus status, Staff arg)
{
ProcessChanges(status, arg, Staff);
}
private void Groups_OnChanged(DbChangeStatus status, Group arg)
{
ProcessChanges(status, arg, Groups);
}