/// <inheritdoc />
public async Task LoadAsync()
{
if (this.contributionTypes != null || this.Loaded)
{
return;
}
await this.fileAccessSemaphore.WaitAsync();
this.Loaded = true;
try
{
var file = await ApplicationData.Current.LocalFolder.CreateFileAsync(
FileName,
CreationCollisionOption.OpenIfExists);
this.contributionTypes = await file.GetDataAsync <ContributionTypeContainerWrapper>();
}
catch (Exception ex)
{
#if DEBUG
System.Diagnostics.Debug.WriteLine(ex.ToString());
#endif
}
finally
{
this.fileAccessSemaphore.Release();
}
if (this.contributionTypes == null)
{
this.contributionTypes = new ContributionTypeContainerWrapper {
LastDateChecked = DateTime.MinValue
};
await this.SaveAsync();
}
this.LastDateChecked = this.contributionTypes.LastDateChecked;
}
/// <inheritdoc />
public async Task UpdateAsync(bool forceUpdate)
{
await this.LoadAsync();
if (!NetworkStatusManager.Current.IsConnected())
{
return;
}
if (this.LastDateChecked < DateTime.UtcNow - this.TimeBetweenUpdates || forceUpdate)
{
IEnumerable <ContributionType> serviceTypes = null;
try
{
serviceTypes = await this.client.GetContributionTypesAsync();
}
catch (HttpRequestException hre) when(hre.Message.Contains("401"))
{
// Show dialog, unauthorized user detected.
Application.Current.Exit();
}
if (serviceTypes != null)
{
if (this.contributionTypes == null)
{
this.contributionTypes = new ContributionTypeContainerWrapper();
}
this.LastDateChecked = DateTime.UtcNow;
this.contributionTypes.LastDateChecked = this.LastDateChecked;
this.contributionTypes.ContributionTypes.Clear();
this.contributionTypes.ContributionTypes.AddRange(serviceTypes);
await this.SaveAsync();
}
}
}
