void AddViewedThread(ViewedThread viewedThread)
{
this.viewedThreadsById.Add(viewedThread.ThreadId, viewedThread);
if (viewedThread.Read)
{
++this.readThreadCount;
}
}
void RemoveViewedThread(ViewedThread viewedThread)
{
if (!this.viewedThreadsById.Remove(viewedThread.ThreadId))
{
throw new KeyNotFoundException();
}
if (viewedThread.Read)
{
--this.readThreadCount;
}
}
void UpdateViewWithThread(YamsterThread thread)
{
bool shouldBeInView = false;
if (CompiledFunc != null)
{
var executionContext = new YqlExecutionContext(this.appContext);
executionContext.Thread = thread;
shouldBeInView = CompiledFunc(executionContext);
}
ViewedThread viewedThread = null;
bool isInView = viewedThreadsById.TryGetValue(thread.ThreadId, out viewedThread);
bool statisticsChanged = false;
if (isInView)
{
if (!shouldBeInView)
{
this.RemoveViewedThread(viewedThread);
NotifyViewChanged(YamsterViewChangeType.ModelLeaveView, thread);
// TotalItemCount changed
statisticsChanged = true;
}
else
{
if (thread.Read != viewedThread.Read)
{
this.readThreadCount += thread.Read ? +1 : -1;
viewedThread.Read = thread.Read;
statisticsChanged = true;
}
}
}
else
{
if (shouldBeInView)
{
AddViewedThread(new ViewedThread(thread));
NotifyViewChanged(YamsterViewChangeType.ModelEnterView, thread);
// TotalItemCount changed
statisticsChanged = true;
}
}
if (statisticsChanged)
{
NotifyViewChanged(YamsterViewChangeType.StatisticsChanged, null);
}
}