public async void Enqueue(Message message)
{
if (_serviceBus == null)
return;
//fire & forget
var bm = new BrokeredMessage(JsonConvert.SerializeObject(message));
bm.ContentType = "text/plain";
await _serviceBus.SendAsync(bm).ConfigureAwait(false);
}
private bool OnMessageArrived(Message messageDto)
{
var userTag = new string[2];
try
{
using (var db = new ApplicationDbContext())
{
var result = db.Users.FirstOrDefault(node => node.Id == messageDto.SenderId);
userTag[0] = "username:"******"Some rando";
var senderId = 0;
if (result != null)
{
username = result.NickName;
senderId = result.Id;
result.KinderPoints++;
}
userTag[1] = "from:" + senderId;
var push = new PushObject()
{
Message = username + " has sent you an encrypted message!",
FromId = senderId.ToString()
};
var notification = new Dictionary<string, string> { { "message", JsonConvert.SerializeObject(push) } };
//await Notifications.Instance.Hub.SendTemplateNotificationAsync(notification, userTag);
//await db.SaveChangesAsync();
}
}
catch (Exception ex)
{
// TODO: Log error.
}
return true;
}
//Use AutoMapper?
private IncomingMessage MessageDtoConverter(Message msg)
{
return new IncomingMessage
{
Text = msg.Text,
GroupId = msg.GroupId,
EncryptionKey = msg.EncryptionKey,
Thumbnail = msg.Thumbnail,
MessageToken = msg.MessageToken,
FromUserName = msg.SenderName,
FromUserId = msg.SenderId,
ToUserId = msg.ReceiverId,
MessageType = (MessageType)msg.MessageTypeId,
EventId = msg.EventId,
Time = msg.CreatedAt
};
}
private void OnMessageProcessed(Message msg, bool isSent)
{
msg.IsSent = isSent;
_processedMessagesQueue.Enqueue(msg);
if (isSent)
{
//TODO: remove this line later
_deliveryStatusEventManager.DeliverEventToDevice(new DeliveryNotification { MessageToken = msg.MessageToken, ReceiverDeviceId = msg.SenderDeviceId });
foreach (var senderDeviceId in _devicesRepository.GetDevices(msg.SenderId))
{
if (senderDeviceId != msg.SenderDeviceId)
_deliveryStatusEventManager.DeliverEventToDevice(new DeliveryNotification { MessageToken = msg.MessageToken, ReceiverDeviceId = senderDeviceId });
}
}
}
public SendMessageResponse SendMessage(ISession session, SendMessageRequest request)
{
var response = request.CreateResponse<SendMessageResponse>();
Logger.Info("SendMessage from Id={0} (Device={1}) to Id={2} ({3} devices)",
session.UserId, session.DeviceId.Cut(), request.ReceiverUserId, request.Keys != null ? request.Keys.Count : -1);
Dictionary<string, long> actualMessageReceiversDevices = null;
Dictionary<string, byte[]> keys = request.Keys;
if (request.GroupId != Guid.Empty)// group conversation
{
var groupChat = _groupChatsRepository.GetChat(request.GroupId);
//sender is in the group?
if (groupChat.Participants.All(i => i.UserId != session.UserId))
{
response.Success = false;
response.Error = Errors.YouAreNotParticipantOfThatGroup;
return response;
}
if (keys == null) //means not encrypted
{
keys = groupChat.Participants
.SelectMany(p => p.Devices)
.Where(p => p != session.DeviceId)
.Distinct()
.ToDictionary<string, string, byte[]>(k => k, v => null); //null value means unencrypted
}
else
{
//it means we will check all provided devices below (see if (actualMessageReceiversDevices != null)) -- just to avoid copy-paste
actualMessageReceiversDevices = new Dictionary<string, long>();
foreach (var groupChatParticipant in groupChat.Participants)
{
foreach (var device in groupChatParticipant.Devices)
{
actualMessageReceiversDevices[device] = groupChatParticipant.UserId;
}
}
}
}
else // private conversation
{
if (request.ReceiverUserId == session.UserId)
{
response.Success = false;
response.Error = Errors.SendMessage_ReceiverAndSenderAreSame;
return response;
}
if (keys == null)//means not encrypted
{
keys = _devicesRepository.GetDevices(request.ReceiverUserId).ToDictionary<string, string, byte[]>(k => k, v => null);
}
else
{
//it means we will check all provided devices below (see if (actualMessageReceiversDevices != null)) -- just to avoid copy-paste
actualMessageReceiversDevices = _devicesRepository.GetDevices(request.ReceiverUserId).ToDictionary(k => k, v => request.ReceiverUserId);
}
}
if (actualMessageReceiversDevices != null) //TODO: uncoment later
{
var providedDevices = keys.Select(i => i.Key);
List<string> union;
List<string> notProvidedDevices; //conversation has more devices than user provided as targets
List<string> wrongDevices; //some of the devices user provided are not members of that conversation
actualMessageReceiversDevices.Select(i => i.Key)
.FindIntersectionAndDifference(providedDevices, out union, out notProvidedDevices, out wrongDevices);
if (notProvidedDevices.Any())
{
response.Success = false;
response.Error = Errors.SendMessage_ProvideKeysForTheseDevices;
//we will help the user - provide public keys as well
response.MissedDevicesWithPublicKeysToReEncrypt = notProvidedDevices
.Where(d => session.DeviceId != d)
.Select(d => new PublicKeyInfo
{
DeviceId = d,
PublicKey = _devicesRepository.GetPublicKeyForDevice(d),
UserId = actualMessageReceiversDevices[d]
})
.ToList();
return response;
}
//cut receivers not in the conversation
//TODO: uncomment it later
/*foreach (var key in wrongDevices)
{
keys.Remove(key);
}*/
}
keys.Remove(session.DeviceId);
if (keys.Count < 1)
{
response.Success = false;
response.Error = Errors.SendMessage_ReceiversNotFound;
return response;
}
foreach (var key in keys)
{
var innerMsg = new Message
{
SenderAccessToken = session.AccessToken,
Text = request.Message,
GroupId = request.GroupId,
SenderId = session.UserId,
SenderDeviceId = session.DeviceId,
SenderName = request.SenderName,
ReceiverId = request.ReceiverUserId,
MessageTypeId = (int)request.MessageType,
Thumbnail = request.Thumbnail,
ReceiverDeviceId = key.Key,
EncryptionKey = key.Value,
MessageToken = request.MessageToken,
};
_messageEventManager.DeliverEventToDevice(innerMsg);
}
return response;
}
