private void InitializeFeed(ForumsIndexFeed feed)
{
this.feed = feed;
this.feed.SubscribeAsync(OnNext, OnError, OnCompleted);
}
public ForumsIndexGroup(ForumsIndexFeed feed, PinnedForumsGroup pinned) : this() {
this.createFeed = () => feed;
}
protected override async Task OnSelectedAsyncCore(object state, IProgress<string> progress)
{
if (!this.IsBusy && this.Items.Count == 0)
await LoadAsync(() =>
{
if (this.feed == null)
{
ReportProgress(progress, "Creating forums index feed...");
this.feed = this.createFeed();
this.InitializeFeed(feed);
}
return this.feed.UpdateAsync();
}, progress);
else
{
SetOnItemsReady(true);
}
}
protected override async Task OnRefreshAsyncCore(object state, IProgress<string> progress)
{
if (!this.IsBusy)
await this.LoadAsync(() =>
{
if (this.feed == null)
{
ReportProgress(progress, "Creating forums index feed...");
this.feed = this.createFeed();
this.InitializeFeed(feed);
}
ReportProgress(progress, "Refreshing forums index...");
return this.feed.PullAsync();
}, progress);
}
private async Task LoadAsync(Func<Task> requestAsync, IProgress<string> progress)
{
this.IsBusy = true;
// detach listener to pin changes
ThreadDataGroup.PinChanged -= ThreadDataGroup_PinChanged;
ReportProgress(progress, "Loading forums...");
if (this.feed == null)
{
ReportProgress(progress, "Creating forums index feed...");
this.feed = this.createFeed();
this.InitializeFeed(feed);
}
await requestAsync();
this.IsBusy = false;
ReportProgress(progress, null);
}