public async Task SyncAsync()
{
bool lockTaken = false;
try
{
lockTaken = await _semaphore.WaitAsync(0);
if (lockTaken)
{
string userId = Utilities.GetUserId();
var lastSyncedTicks = Utilities.GetLongFromPreferences(Application.Context, $"{userId}_LastSyncedOn");
var newTasksFromServer = await _syncHelper.PullAsync(lastSyncedTicks);
var newTasksInClient = await _dataHelper.GetAllFromDateTimeAsync(userId, lastSyncedTicks);
if (newTasksInClient != null && newTasksInClient.Count > 0)
{
await _syncHelper.PushAsync(newTasksInClient);
}
if (newTasksFromServer != null && newTasksFromServer.Any())
{
await UpdateTasksAsync(newTasksFromServer);
// Invoke event
NewTasksAvailable?.Invoke(this, new EventArgs());
}
Utilities.SaveLongToPreferences(Application.Context, $"{userId}_LastSyncedOn", DateTime.UtcNow.Ticks);
}
}
catch (Exception ex)
{
Log.WriteLine(LogPriority.Error, "Planner Error", ex.Message);
}
finally
{
if (lockTaken)
{
_semaphore.Release();
}
}
}