/// <summary>
/// Runs the task.
/// </summary>
/// <returns>The task.</returns>
/// <param name="task">Task.</param>
/// <param name="handleException">If set to <c>true</c> handle exception. Otherwise, throw the exeption to be handled by calling ViewModel.</param>
/// <param name="actionOnException">If handleException is <c>false</c>, then invoke this method to handle exception.</param>
/// <param name="messageOnException">Message on display when exception occurs.</param>
/// <param name="lockNavigation">Lock the navigation and keep the user on the current view.</param>
/// <param name="ignoreIsBusy">tells the Task Runner that it should not modify the state of Is Busy</param>
/// <param name="caller">Calling method.</param>
/// <typeparam name="T">The 1st type parameter.</typeparam>
protected async Task RunTask(Task task, bool handleException = true, Action <Exception, string> actionOnException = null, string messageOnException = null, bool?lockNavigation = null,
bool ignoreIsBusy = false, [CallerMemberName] string caller = null)
{
UpdateIsBusy(!ignoreIsBusy || IsBusy, lockNavigation);
await task.ContinueWith((thisTask) => {
UpdateIsBusy(ignoreIsBusy && IsBusy);
if (thisTask.IsFaulted && thisTask.Exception != null)
{
Exception exception = null;
if (thisTask.Exception.InnerException != null)
{
exception = thisTask.Exception.InnerException;
while (exception.InnerException != null)
{
exception = exception.InnerException;
}
}
else
{
exception = thisTask.Exception;
}
if (exception is OfflineException)
{
DeviceService.BeginInvokeOnMainThread(() =>
{
//NavigationService.NavigateAsync(nameof(ServiceInfoPage), new NavigationParameters { { AppConstants.MaintenanceMessageKey, (exception.InnerException ?? exception).Message } }, true, false);
UserDialogs.Toast(Strings.Resources.OfflineMessage);
});
}
else if (!handleException)
{
if (actionOnException == null)
{
throw exception;
}
DeviceService.BeginInvokeOnMainThread(() => actionOnException.Invoke(exception, messageOnException));
}
}
});
}
protected async Task NavigateToUri(string uri)
{
if (string.IsNullOrWhiteSpace(uri))
{
throw new ArgumentException("Value cannot be null or white space.", nameof(uri));
}
try
{
DeviceService.BeginInvokeOnMainThread(async() =>
{
PlaySoundService.PlaySound(AppSoundsEnum.DigitalButton);
await NavigationService.NavigateAsync(uri, useModalNavigation: false);
});
}
catch (Exception ex)
{
await HandleException(ex);
}
}
protected void SetIsBusy()
{
DeviceService.BeginInvokeOnMainThread(() => IsBusy = true);
}
protected void ClearIsBusy()
{
DeviceService.BeginInvokeOnMainThread(() => IsBusy = false);
}
