//User is disconnecting, remove user from list of registered users
public int Disconnect(int userId, string userName)
{
IQueueMessageCallback registeredUser = OperationContext.Current.GetCallbackChannel <IQueueMessageCallback>();
_queueData = new QueueDataBuilder().Build();
if (_callbackList.Select(u => u.Id).Contains(userId))
{
var leavingUser = _callbackList.Where(u => u.Id == userId).FirstOrDefault();
_callbackList.Remove(leavingUser);
leavingUser.QueueData.Owner = string.Empty;
QueueDatabase.UpdateUsersQueue(leavingUser.QueueData);
Console.WriteLine("User {0} disconnected at {1}", userName, DateTime.Now.ToShortTimeString());
}
try
{
_callbackList.Select(c => c.RegisteredUser).ToList().ForEach(
delegate(IQueueMessageCallback callback) {
callback.NotifyClientDisconnected(userName);
});
}
catch (Exception ex)
{
Console.WriteLine("ERROR in callback NotifyClientDisconnected: ");
Console.WriteLine(ex.Message);
}
return(_registeredUsers--);
}
//Pass additional message and call it back to the user
public void ReceiveAdditionalMessage(int userId, string additionalMessage)
{
IQueueMessageCallback registeredUser = OperationContext.Current.GetCallbackChannel <IQueueMessageCallback>();
var queueData = QueueDatabase.FindQueue(userId);
queueData.AdditionalMessage = additionalMessage;
QueueDatabase.UpdateUsersQueue(queueData);
var connectedUsers = _callbackList.Where(u => u.QueueData.UserId == userId).ToList();
foreach (var c in connectedUsers)
{
c.QueueData.AdditionalMessage = additionalMessage;
}
Console.WriteLine("Additional message: {0}", additionalMessage);
try
{
_callbackList.Where(q => q.QueueData.RoomNo == queueData.RoomNo).Select(c => c.RegisteredUser).ToList().ForEach(
delegate(IQueueMessageCallback callback) {
callback.NotifyOfReceivedAdditionalMessage(additionalMessage);
});
}
catch (Exception ex)
{
Console.WriteLine("ERROR in callback NotifyOfReceivedAdditionalMessage: ");
Console.WriteLine(ex.Message);
}
}
//Pass new queue number and call it back to the user
public void ReceiveQueueNo(int userId, int queueNo, string userInitials)
{
IQueueMessageCallback registeredUser = OperationContext.Current.GetCallbackChannel <IQueueMessageCallback>();
var queueData = QueueDatabase.FindQueue(userId);
//if queueNo > 0 update queueNo and turn off break, then update database
if (queueNo > 0)
{
queueData.QueueNo = queueNo;
queueData.isBreak = false;
}
//else if queueNo = -1 set break to true and keep do nothing with queueNo, then update database
else if (queueNo == -1)
{
queueData.isBreak = true;
}
queueData.UserInitials = userInitials;
QueueDatabase.UpdateUsersQueue(queueData);
//update queue of each connected user containing same queue userid
var connectedUsers = _callbackList.Where(u => u.QueueData.UserId == userId).ToList();
foreach (var c in connectedUsers)
{
c.QueueData = queueData;
}
try
{
_callbackList.Where(q => q.QueueData.RoomNo == queueData.RoomNo).Select(c => c.RegisteredUser).ToList().ForEach(
delegate(IQueueMessageCallback callback) {
callback.NotifyOfReceivedQueueNo(queueData.QueueNoMessage);
});
}
catch (Exception ex)
{
Console.WriteLine("ERROR in callback NotifyOfReceivedQueueNo: ");
Console.WriteLine(ex.Message);
}
}