public async Task <WrapResult <T> > TryWithErrorHandlingAsync <T>(
Func <Task <T> > task,
Func <Exception, Task <bool> > customErrorHandler = null)
{
var result = WrapResult <T> .Failed;
bool keepTrying;
whenStarting?.Invoke();
if (!connectivityService.IsThereInternet)
{
loggingService?.Warning("There's no Internet access");
return(result);
}
do
{
keepTrying = false;
try
{
T actualResult = await task();
result = new WrapResult <T>(actualResult, true);
}
catch (HttpRequestException exception)
{
loggingService?.Warning($"{exception}");
if (customErrorHandler == null || !await customErrorHandler?.Invoke(exception))
{
await Application.Current.MainPage.DisplayAlert(
Resources.Alert_Title_UnexpectedError,
Resources.Alert_Message_InternetError,
Resources.Alert_OK_OKEllipsis);
}
}
catch (TaskCanceledException exception)
{
loggingService?.Debug($"{exception}");
}
catch (Exception exception)
{
loggingService?.Error(exception);
if (customErrorHandler == null || !await customErrorHandler?.Invoke(exception))
{
await Application.Current.MainPage.DisplayAlert(
Resources.Alert_Title_UnexpectedError,
Resources.Alert_Message_InternetError,
Resources.Alert_OK_OKEllipsis);
}
}
}while (keepTrying);
whenFinished?.Invoke();
return(result);
}
public async Task <WrapResult <object> > TryWithErrorHandlingAsync(
Func <Task> task,
Func <Exception, Task <bool> > customErrorHandler = null)
{
Func <Task <object> > taskWrapper = new Func <Task <object> >(async() =>
{
await task();
return(new object());
});
WrapResult <object> result = await TryWithErrorHandlingAsync(
new Func <Task <object> >(taskWrapper),
customErrorHandler);
return(result);
}