public async void NavigatedToView(Type viewType, bool forward)
{
_navId++;
int myNavID = _navId;
_cancelationTokenSource.Cancel();
var currentContext = _viewModelContextService.Context;
if (currentContext is CommentsViewModel && ((CommentsViewModel)currentContext).Link != null)
{
try
{
await _suspendableWorkQueue.QueueLowImportanceRestartableWork(async (token) =>
{
await NavigatedToOfflineableThingImpl(((CommentsViewModel)currentContext).Link.LinkThing, true);
});
}
catch (TaskCanceledException)
{
}
}
if (myNavID != _navId)
{
_cancelationTokenSource.Cancel();
return;
}
else
_cancelationTokenSource = new CancellationTokenSource();
if ((DateTime.Now - lastOppertunity).TotalSeconds < 10)
return;
else
lastOppertunity = DateTime.Now;
//determine if this is a good time to be caching things
//and what should be our highest priority to be cached
var viewModelContextStack = _viewModelContextService.ContextStack;
_firstRedditViewModel = viewModelContextStack.OfType<RedditViewModel>().FirstOrDefault();
_firstCommentsViewModel = viewModelContextStack.OfType<CommentsViewModel>().FirstOrDefault();
var networkAvailable = System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable();
//no network means there is no reason for us to do anything
if (!networkAvailable)
return;
var onMeteredConnection = _systemServices.IsOnMeteredConnection;
OffliningOpportunityPriority priority = OffliningOpportunityPriority.None;
if (viewType == _dynamicViewLocator.LinkedPictureView && forward)
priority = OffliningOpportunityPriority.Image;
else if (viewType == _dynamicViewLocator.CommentsView && forward)
priority = OffliningOpportunityPriority.Comments;
else if (viewType == _dynamicViewLocator.RedditView)
priority = OffliningOpportunityPriority.ImageAPI;
OffliningOpportunity(priority, onMeteredConnection ? NetworkConnectivityStatus.Metered : NetworkConnectivityStatus.Unmetered, _cancelationTokenSource.Token);
}
