private async Task StartDequeuingMarkedItems(MarkedDelegate onSuccess = null, MarkedDelegate onFailure = null)
{
try
{
if (_markedMessagesQueue.Count > 0)
{
ProductMarkChangedMessage msg = null;
lock (_markedMessagesQueue)
{
msg = _markedMessagesQueue.Dequeue();
}
var succeeded = await MarkProductAsFavorite(msg.Model.GroupId, msg.Model.Id, msg.Marked);
if (succeeded)
{
_previuosTryWasFailure = false;
onSuccess?.Invoke(msg.Model.GroupId, msg.Model.Id, msg.Marked);
}
else
{
onFailure?.Invoke(msg.Model.GroupId, msg.Model.Id, msg.Marked);
if (_previuosTryWasFailure)
{
foreach (var queuedMsg in _markedMessagesQueue)
{
onFailure?.Invoke(queuedMsg.Model.GroupId, queuedMsg.Model.Id, queuedMsg.Marked);
}
_markedMessagesQueue = new Queue <ProductMarkChangedMessage>();
_markedMessagesDequeuingStarted = false;
}
_previuosTryWasFailure = true;
}
await StartDequeuingMarkedItems(onSuccess, onFailure);
}
else
{
_markedMessagesDequeuingStarted = false;
}
}
catch (Exception ex)
{
OnException(ex);
}
}
public void MarkProductAsFavorite(ProductMarkChangedMessage msg, MarkedDelegate onSuccess = null, MarkedDelegate onFailure = null)
{
lock (_markedMessagesQueue)
{
if (!_markedMessagesQueue.Any(x => (!x.Model.GroupId.IsNullOrEmpty() && x.Model.GroupId == msg.Model.GroupId) || x.Model.Id == msg.Model.Id))
{
_markedMessagesQueue.Enqueue(msg);
}
}
if (!_markedMessagesDequeuingStarted)
{
_markedMessagesDequeuingStarted = true;
Task.Run(() => StartDequeuingMarkedItems(onSuccess, onFailure));
}
}
protected override void OnMarkChangedMsgRecieved(ProductMarkChangedMessage msg)
{
//обрабатываем только удаление товара
if (msg.Marked)
return;
var product = msg.Model;
InvokeOnMainThread(() =>
{
Items.Remove(Items.FirstOrDefault(p => p.Model.Id == product.Id &&
p.Model.GroupId == product.GroupId));
Empty = Items.IsNullOrEmpty();
});
MarkProductVmService.MarkProductAsFavorite(msg, onSuccess: (groupId, productId, isMarked) =>
{
Messenger.Publish(new ProductMarkedQuantityChangedMessage(this));
});
}
