private async void DataServiceOnDataRefreshed(object sender, DataRefreshedEventArgs dataRefreshedEventArgs)
{
await DispatcherHelper.UIDispatcher.InvokeAsync(() =>
{
try
{
switch (dataRefreshedEventArgs.DataType)
{
case DataType.TopStoriesArticles:
UpdateHeadLine();
UpdateTopStoriesArticles();
HasInternet = dataRefreshedEventArgs.IsSuccess;
if (!dataRefreshedEventArgs.IsSuccess && !IsCachedModeMessageDisplayed)
{
IsCachedModeMessageDisplayed = true;
}
IsRefreshingTopStoriesArticles = false;
break;
case DataType.BreakingNewsArticles:
UpdateBreakingStoriesArticles();
HasInternet = dataRefreshedEventArgs.IsSuccess;
if (!dataRefreshedEventArgs.IsSuccess && !IsCachedModeMessageDisplayed)
{
IsCachedModeMessageDisplayed = true;
}
IsRefreshingBreakingNewsArticles = false;
break;
case DataType.Categories:
IsRefreshingCategories = true;
if (ListOfCategories != null && ListOfCategories.Count != 0)
{
IsRefreshingCategories = false;
return;
}
else if (ListOfCategories == null)
{
ListOfCategories = new ObservableCollection <CategoryDetailsModel>();
}
ListOfCategories.Clear();
foreach (var category in _dataService.ListOfCategories)
{
ListOfCategories.Add(category);
}
IsRefreshingCategories = false;
break;
}
}
catch (Exception exception)
{
if (Debugger.IsAttached)
{
Debug.WriteLine("MainViewModel:" + exception);
}
}
});
}
private async void RefreshCategories()
{
DispatcherHelper.UIDispatcher.BeginInvoke(() =>
{
IsRefreshingCategories = true;
if (ListOfCategories == null)
{
ListOfCategories = new ObservableCollection <CategoryDetailsModel>();
}
});
try
{
var categories = new List <CategoryDetailsModel>();
foreach (var category in await _dataService.GetCategoryDetailsAsync(true))
{
categories.Add(category);
}
if (categories != null && categories.Count >= 1)
{
DispatcherHelper.UIDispatcher.BeginInvoke(() =>
{
ListOfCategories.Clear();
foreach (var category in categories.OrderBy(o => o.Order))
{
ListOfCategories.Add(category);
}
});
}
}
catch (Exception exception)
{
if (Debugger.IsAttached)
{
Debug.WriteLine("MainViewModel:" + exception);
}
}
DispatcherHelper.UIDispatcher.BeginInvoke(() =>
{
IsRefreshingCategories = false;
if (ListOfCategories != null && ListOfCategories.Count > 0)
{
if (FavCategories == null)
{
FavCategories = new ObservableCollection <CategoryDetailsModel>();
}
FavCategories.Clear();
foreach (var category in ListOfCategories)
{
if (category.IsPinned == true)
{
FavCategories.Add(category);
}
}
}
});
}
private async void LoadOrRefreshCategories()
{
DispatcherHelper.UIDispatcher.BeginInvoke(() => { IsRefreshingCategories = true; });
try
{
if (ListOfCategories == null || ListOfCategories.Count != 0)
{
DispatcherHelper.UIDispatcher.BeginInvoke(() => { IsRefreshingCategories = false; });
return;
}
var categories = new List <CategoryDetailsModel>();
var categoriesFromDS = await _dataService.GetCategoryDetailsAsync();
if (categoriesFromDS != null && categoriesFromDS.Count > 0)
{
foreach (var category in categoriesFromDS)
{
categories.Add(category);
}
DispatcherHelper.UIDispatcher.BeginInvoke(() =>
{
ListOfCategories.Clear();
foreach (var category in categories.OrderBy(o => o.Order))
{
ListOfCategories.Add(category);
}
});
}
}
catch (Exception exception)
{
if (Debugger.IsAttached)
{
Debug.WriteLine("MainViewModel:" + exception);
}
}
DispatcherHelper.UIDispatcher.BeginInvoke(() => { IsRefreshingCategories = false; });
}