public async override void ViewAppeared()
{
Products = ProductService.GetAllProducts();
Events = EventService.GetAllEvents();
ProductsLoaded = (ProductCount > 0);
EventsLoaded = (EventCount > 0);
//if we're connected lets check for data
if (IsConnected)
{
ProgressBarTitle = "Syncing...";
await Task.Delay(100);
//if either the products or events aren't loaded, lets go get them.
if (!ProductsLoaded || !EventsLoaded)
{
//something's not loaded, lets go get it.
if (!ProductsLoaded)
{
ProgressBarTitle = "Retrieving Products...";
try
{
if (Products == null)
{
Products = new List <Product>();
}
var productData = await DataRetrievalService.GetProductData();
ProgressBarProgress = 10;
await Task.Delay(100);
//uncomment to pitch error here
//int i = 0;
//int text = 15 / i;
ProgressBarTitle = "Saving Products...";
int progress = 10;
var numProducts = 0;
foreach (Product p in productData.data)
{
numProducts = numProducts + ProductService.SaveProduct(p);
if (numProducts % 25 == 0)
{
progress++;
ProgressBarProgress = progress;
await Task.Delay(10);
}
}
await Task.Delay(100);
Products = ProductService.GetAllProducts();
ProductsLoaded = true;
}
catch
{
//if we're in error, set the message, isnoterror and bail, we can't do any more.
ErrorMessage = "We couldn't load that.";
IsNotError = false;
return;
}
}
ProgressBarTitle = "Products Loaded!";
await Task.Delay(250);
if (!EventsLoaded)
{
ProgressBarTitle = "Retrieving Events...";
ProgressBarProgress = 50;
try
{
if (Events == null)
{
Events = new List <Event>();
}
var eventData = await DataRetrievalService.GetEventData();
ProgressBarTitle = "Saving Events...";
int progress = 50;
var numEvents = 0;
foreach (Event e in eventData.data)
{
numEvents = numEvents + EventService.SaveEvent(e);
if (numEvents % 25 == 0)
{
progress++;
ProgressBarProgress = progress;
await Task.Delay(10);
}
}
Events = EventService.GetAllEvents();
EventsLoaded = true;
ProgressBarTitle = "Events Loaded.";
ProgressBarProgress = 100;
await Task.Delay(100);
}
catch
{
//if we're in error, set the message, isnoterror and bail, we can't do any more.
//ErrorMessage = "We couldn't load that.";
IsNotError = false;
return;
}
}
ProgressBarTitle = "Data Loaded!";
ProgressBarProgress = 100;
await Task.Delay(1000);
if (ProductsLoaded && EventsLoaded)
{
await _navigationService.Navigate <ProductsViewModel>();
}
}
else if (ProductsLoaded && EventsLoaded)
{
//everything's loaded, lets ski-daddle!
ProgressBarProgress = 100;
ProgressBarTitle = "Data Loaded!";
await Task.Delay(2000);
await _navigationService.Navigate <ProductsViewModel>();
}
}
base.ViewAppeared();
}