public void Disconnect(Client clientToRemove)
{
string methodName = new StackFrame().GetMethod().Name;
//AppLog.InfoFormat("{0}(): Starting to disconnect from clients", methodName);
lock (syncObj)
{
IList<Client> foundClients = (from c in dictClientCallBacks.Keys
where c.Name == clientToRemove.Name
select c).ToList();
if (foundClients != null && foundClients.Count() > 0)
{
foreach (Client eachFound in foundClients)
{
dictClientCallBacks.Remove(eachFound);
clientsOnLine.Remove(eachFound);
}
}
foreach (KeyValuePair<Client, IChatCallback> keyValuePair in dictClientCallBacks)
{
Client client = keyValuePair.Key;
if (client.Facility == clientToRemove.Facility)
{
IChatCallback callBack = keyValuePair.Value;
try
{
callBack.RefreshClients(this.clientsOnLine);
callBack.UserLeave(clientToRemove);
}
catch (Exception ex)
{
//AppLog.ErrorFormat("{0}(): Failed to disconnect from client. client: {1}, Exception: {2}",
//methodName, clientToRemove.Name, ex);
}
}
}
}
return;
}
public bool Connect(Client client)
{
string methodName = new StackFrame().GetMethod().Name;
if (!dictClientCallBacks.ContainsValue(CurrentCallback) && !SearchClientsByName(client.Name))
{
return ProcessNewJoinConnection(client);
}
else if (SearchClientsByName(client.Name))
{ // handle reenter to chat server
return ProcessReJoinConnection(client);
}
else
{
//AppLog.ErrorFormat("{0}(): Problem to connect to chat server. Facility: {1}, Client: {2}",
//methodName, client.Facility, client.Name);
}
return false;
}
private bool ProcessReJoinConnection(Client client)
{
string methodName = new StackFrame().GetMethod().Name;
// notify everyone client rejoined
lock (syncObj)
{
//AppLog.InfoFormat("{0}(): Chat client already exists. Facility: {1}, client: {2}",
// methodName, client.Facility, client.Name);
Client existingClient = (from c in dictClientCallBacks.Keys
where c.Name == client.Name
select c).FirstOrDefault();
if (existingClient == null)
{
//AppLog.ErrorFormat("{0}(): client does not exist in dictClientCallBacks. Client: {1}", methodName, client.Name);
return false;
}
if (dictClientCallBacks[existingClient] != CurrentCallback)
{
dictClientCallBacks[client] = CurrentCallback;
//AppLog.InfoFormat("{0}(): Callback updated for client: {1}", methodName, client.Name);
}
}
return true;
}
private void ProcessIsWriting(Client client, bool isEnding)
{
if (client == null)
{
//AppLog.ErrorFormat("{0}(): client is not specified", new StackFrame().GetMethod().Name);
return;
}
foreach (KeyValuePair<Client, IChatCallback> keyValuePair in dictClientCallBacks)
{
Client callbackClient = keyValuePair.Key;
if (callbackClient.Facility == client.Facility)
{
IChatCallback callback = keyValuePair.Value;
try
{
if (isEnding)
{
callback.IsWritingCallback(null);
}
else
{
callback.IsWritingCallback(client);
}
}
catch (Exception ex)
{
//AppLog.ErrorFormat("{0}(): Failed to call IsWritingCallback. client: {1}, callBackClient: {2} Exception: {3}",
//new StackFrame().GetMethod().Name, client.Name, callbackClient.Name, ex);
}
}
}
}
private bool ProcessNewJoinConnection(Client client)
{
string methodName = new StackFrame().GetMethod().Name;
//AppLog.InfoFormat("{0}(): Chat client connected for client. facility: {1}, client: {2}",
// methodName, client.Facility, client.Name);
lock (syncObj)
{
dictClientCallBacks.Add(client, CurrentCallback);
clientsOnLine.Add(client);
List<Client> clientsOnFacility = (from c in dictClientCallBacks.Keys
where c.Facility == client.Facility
select c).ToList();
// call back to the new joined client first
if (!CallbackUserJoined(clientsOnFacility, client, client))
{
//AppLog.ErrorFormat("{0}(): Chat client failed to set up connection");
return false;
}
int clientNotified = 0;
foreach (Client callBackClient in clientsOnFacility)
{
if (client.Name != callBackClient.Name)
{
if (CallbackUserJoined(clientsOnFacility, client, callBackClient))
{
clientNotified++;
}
}
}
if (clientNotified > 0)
{
//AppLog.ErrorFormat("{0}(): Failed to notify {1} client(s)", methodName, clientNotified);
}
}
return true;
}
private bool CallbackUserJoined(List<Client> clientsOnFacility, Client client, Client callBackClient)
{
IChatCallback callback = dictClientCallBacks[callBackClient];
try
{
callback.RefreshClients(clientsOnFacility);
callback.UserJoin(client);
}
catch (Exception ex)
{
dictClientCallBacks.Remove(callBackClient);
//AppLog.ErrorFormat("{0}(): Failed to callback. Facility: {1}, Client: {2}, Callback client: {3}, Exception {4}",
// new StackFrame().GetMethod().Name, client.Facility, client.Name, callBackClient.Name, ex);
return false;
}
return true;
}
public void Whisper(ChatMessage msg, Client receiver)
{
foreach (Client rec in dictClientCallBacks.Keys)
{
if (rec.Name == receiver.Name)
{
try
{
IChatCallback callback = dictClientCallBacks[rec];
callback.ReceiveWhisper(msg, rec);
foreach (Client sender in dictClientCallBacks.Keys)
{
if (sender.Name == msg.Sender)
{
IChatCallback senderCallback = dictClientCallBacks[sender];
senderCallback.ReceiveWhisper(msg, rec);
return;
}
}
}
catch (Exception ex)
{
//AppLog.ErrorFormat("{0}(): Failed to whisper. sender: {1}, Receiver: {2}, Exception: {3}.",
//new StackFrame().GetMethod().Name, msg.Sender, receiver.Name, ex);
}
}
}
}
public bool SendFile(FileMessage fileMsg, Client receiver)
{
foreach (Client rcvr in dictClientCallBacks.Keys)
{
if (rcvr.Name == receiver.Name)
{
try
{
string fileSizeText = string.Empty;
if (fileMsg.Data.Length < 1024)
{
fileSizeText = string.Format("{0} bytes", fileMsg.Data.Length);
}
else if ((fileMsg.Data.Length < 1024 * 1024))
{
fileSizeText = string.Format("{0:F2} KBytes", (float)fileMsg.Data.Length / 1024);
}
else
{
fileSizeText = string.Format("{0:F2} MBytes", (float)fileMsg.Data.Length / (1024 * 1024));
}
ChatMessage msg = new ChatMessage();
msg.Sender = fileMsg.Sender;
msg.Content = string.Format("I'm sending file. {0}, Size: {1}", fileMsg.FileName, fileSizeText);
IChatCallback rcvrCallback = dictClientCallBacks[rcvr];
rcvrCallback.ReceiveWhisper(msg, receiver);
rcvrCallback.ReceiverFile(fileMsg, receiver);
foreach (Client sender in dictClientCallBacks.Keys)
{
if (sender.Name == fileMsg.Sender)
{
IChatCallback sndrCallback = dictClientCallBacks[sender];
sndrCallback.ReceiveWhisper(msg, receiver);
return true;
}
}
}
catch (Exception ex)
{
//AppLog.ErrorFormat("{0}(): Failed to send file. Sender: {1}, FilePath: {2}, Receiver: {3}, Exception: {4}",
//new StackFrame().GetMethod().Name, fileMsg.Sender, fileMsg.FileName, receiver.Name, ex);
}
}
}
return false;
}
public void IsWriting(Client client)
{
ProcessIsWriting(client, false);
}
public void EndWriting(Client client)
{
ProcessIsWriting(client, true);
}
