/// <summary>
/// This function handles the received data. It primarily prints the data into the conversation board.
/// </summary>
/// <param name="a_asyncRes"></param>
// It receives the data from the server.
private void ReceiveData(IAsyncResult a_asyncRes)
{
/// Gets the socket.
Socket socket = (Socket)a_asyncRes.AsyncState;
int received = socket.EndReceive(a_asyncRes);
byte[] dataBuf = new byte[received];
/// Copies the content into the data buffer and then converts it into the string.
Array.Copy(m_globalBuffer, dataBuf, received);
string receivedString = Encoding.ASCII.GetString(dataBuf);
/// Checks what kind of information is received.
/// If it is $client$, it consists of all the clients who are online at the moment. This is only received
/// if people join/leave the online status.
/// Otherwise, it is perceived as receiving conversation message. Then, it handles the received conversation
/// message accordingly.
if (receivedString.StartsWith("$clients$"))
{
/// This means that user is receiving the list of clients.
receivedString = receivedString.Substring(9);
writeToList(receivedString);
}
else
{
/// Parses the message to check who sent the message.
string[] splitted = receivedString.Split(new string[] { g_convoLogic }, 2, StringSplitOptions.None);
string email = splitted[0];
/// If the conversation is co-existing, then update into the existing conversation.
/// Else, make a new conversation.
if (m_conversations.ContainsKey(email))
{
m_conversations[email].HandleReceivedData(splitted[1]);
if (m_conversations[email].InvokeRequired)
{
Invoke(new SetCallback(BringConversationToFront), new object[] { email });
}
else
{
BringConversationToFront(email);
}
}
else
{
m_conversations[email] = new SingleChat(m_currentUserEmail, email);
m_conversations[email].HandleReceivedData(splitted[1]);
m_conversations[email].AssignClient(m_clientSocket);
m_conversations[email].ShowDialog();
}
}
/// Begins listening to the socket again.
m_clientSocket.BeginReceive(m_globalBuffer, 0, m_globalBuffer.Length, SocketFlags.None, new AsyncCallback(ReceiveData), m_clientSocket);
}
/// <summary>
/// This function is triggered if an online user is double clicked resulting in opening new form to chat.
/// </summary>
/// <param name="a_sender">It holds the sender.</param>
/// <param name="a_event">It holds the event arguments.</param>
public void ListDoubleClicked(Object a_sender, EventArgs a_event)
{
/// Gets the selected user and opens up the conversation.
string selected = userListView.SelectedItems[0].Text;
if (!m_conversations.ContainsKey(selected))
{
m_conversations[selected] = new SingleChat(m_currentUserEmail, selected);
m_conversations[selected].AssignClient(m_clientSocket);
m_conversations[selected].Show();
}
else
{
m_conversations[selected].BringToFront();
}
}
