private async Task loadChildrenAsync(IContentItem item, bool silent)
{
if (item == null)
{
return;
}
if (item.Children != null)
{
item.Children = new ObservableCollection <IContentItem>();
}
if (item.IsChannel &&
(((item as ChannelEx).CredentialsType == ChannelCredentialsType.UsernamePassword) || ((item as ChannelEx).CredentialsType == ChannelCredentialsType.UsernamePasswordServiceProvider) || ((item as ChannelEx).CredentialsType == ChannelCredentialsType.UsernamePasswordPin)) &&
(!(item as ChannelEx).LoginInfo.HasCredentials))
{
SelectedChannel = item;
return;
}
try
{
IsLoading = true;
IEnumerable <IContentItem> children = null;
if (item.IsRoot)
{
LoggerService.Instance.Log("INFO: Loading channels list");
}
if (item.IsChannel)
{
SelectedChannel = item;
await ImageToolsService.Instance.PreloadUrl((item as ChannelEx).MastheadUrl);
}
if (item.Expired && !item.IsChannel)
{
await renewItemID(item);
}
try
{
children = await getItemChildren(item, silent);
}
catch (UpgradeException)
{
canRefresh = false;
}
catch (MaintenanceException)
{
canRefresh = false;
}
catch (SessionExpiredException)
{
if (await renewItemID(item))
{
markAllExpired();
children = await getItemChildren(item, silent);
item.Expired = false;
}
}
if (children != null)
{
if (children.Any() && !item.IsRoot)
{
var firstChildImage = await ContentClient.GetSmallImage(children.First().ID, SizingMode.Auto);
if ((firstChildImage == null) || (firstChildImage.Length == 0))
{
firstChildImage = await ContentClient.GetSmallImage(item.ID, 192, 128);
}
if ((firstChildImage != null) && (firstChildImage.Length > 0))
{
int width = 0;
int height = 0;
ImageToolsService.Instance.GetImageSize(firstChildImage, out width, out height);
if ((width > 0) && (height > 0))
{
double ratio = width / (double)height;
foreach (var child in children)
{
(child as ContentItemEx).ImageRatio = ratio;
}
}
}
}
item.Children = new ObservableCollection <IContentItem>(children);
}
if (item.IsRoot && (children != null))
{
foreach (var channel in children)
{
loadStoredChannelLoginInfo(channel as ChannelEx);
}
accountViewModel.Channels = new ObservableCollection <IContentItem>(children);
if (item.IsRoot)
{
LoggerService.Instance.Log("INFO: Channels list loaded");
}
}
}
catch (Exception ex)
{
//XXX : Handle error
LoggerService.Instance.Log("ERROR: MediaContent.loadChildrenAsync: " + ex);
}
finally
{
if (IsLoading)
{
IsLoading = false;
}
}
}