/// <summary>
/// Decrypts all messages shown again
/// </summary>
public void Decrypt()
{
ObservableCollection<ListBoxItem> msgs = _viewModel.ChatMsgs;
int i = 0;
foreach (var row in msgs)
{
var panel = row.Content as StackPanel;
if (panel != null)
foreach (object child in panel.Children)
{
if (child is TextBlock)
{
var temp = child as TextBlock;
if (_messages[i].Length > 13 && _messages[i].Substring(0, 13) == "------------ ")
{
continue;
}
switch (_viewModel.SelectedCypher)
{
case (int)Cyphers.SimpleEncryption:
var cypher1 = new SimpleEncryption();
temp.Text = _msgIds[i] + " : " + cypher1.DecryptMessage(_messages[i], _viewModel.Key);
break;
case (int)Cyphers.Rijndael:
var cypher2 = new Rijndael();
temp.Text = _msgIds[i] + " : " + cypher2.DecryptMessage(_messages[i], _viewModel.Key);
break;
}
}
}
i++;
}
}
/// <summary>
/// Handles message receiving and decryption of incoming messages.
/// </summary>
/// <param name="msg"></param>
public void Receive(Message msg)
{
foreach (SharedComponents.Client c in _onlineClients.Values)
{
if (c.Name == msg.Sender)
{
string output = "";
switch (_viewModel.SelectedCypher)
{
case (int)Cyphers.SimpleEncryption:
var cypher1 = new SimpleEncryption();
output = msg.Sender + " : " + cypher1.DecryptMessage(msg.Content, _viewModel.Key);
break;
case (int)Cyphers.Rijndael:
var cypher2 = new Rijndael();
output = msg.Sender + " : " + cypher2.DecryptMessage(msg.Content, _viewModel.Key);
break;
}
ListBoxItem item = MakeItem(c.AvatarID, output);
_viewModel.ChatMsgs.Add(item);
_messages.Add(msg.Content);
using (var terr = new ChatDataContainer())
{
var sender = terr.ChatUsersSet.Where(s => s.Username == msg.Sender).ToList();
var curUser = terr.ChatUsersSet.Where(s => s.Username == _viewModel.Name).ToList();
ChatData temp = new ChatData
{
Id = curUser[0].Id,
Sender = sender[0].Id,
Message = msg.Content,
RecTime = msg.Time,
ChatUsers = curUser[0]
};
_msgIds.Add(msg.Sender);
try
{
terr.ChatDataSet.Add(temp);
terr.SaveChanges();
}
catch (Exception e)
{
_viewModel.Name = e.ToString();
}
}
}
}
_viewModel.ScrollDown();
}
/// <summary>
/// Receives a whisper and decrypts it
/// </summary>
/// <param name="msg"></param>
/// <param name="receiver"></param>
public void ReceiveWhisper(Message msg, SharedComponents.Client receiver)
{
foreach (SharedComponents.Client c in _onlineClients.Values)
{
if (c.Name == msg.Sender)
{
string output = "";
switch (_viewModel.SelectedCypher)
{
case (int)Cyphers.SimpleEncryption:
var cypher1 = new SimpleEncryption();
output = cypher1.DecryptMessage(msg.Content, _viewModel.Key);
break;
case (int)Cyphers.Rijndael:
var cypher2 = new Rijndael();
output = cypher2.DecryptMessage(msg.Content, _viewModel.Key);
break;
}
ListBoxItem item = MakeItem(c.AvatarID,
msg.Sender + " whispers " + receiver.Name + " : " + output);
_viewModel.ChatMsgs.Add(item);
_messages.Add(msg.Content);
_msgIds.Add(msg.Sender + " whispers " + receiver.Name);
}
}
_viewModel.ScrollDown();
}
/// <summary>
/// This method encrypts the message we want to send
/// and sends it either to one recipient (whisper)
/// or all online chat clients
/// </summary>
public void Send()
{
if (_channel != null && _viewModel.ChatInputText != "")
{
if (_channel.State == CommunicationState.Faulted)
{
HandleProxy();
}
else
{
//Create message, assign its properties
//encrypt message
string temp = "";
switch (_viewModel.SelectedCypher)
{
case (int)Cyphers.SimpleEncryption:
var cypher1 = new SimpleEncryption();
temp = cypher1.EncryptMessage(_viewModel.ChatInputText, _viewModel.Key);
break;
case (int)Cyphers.Rijndael:
var cypher2 = new Rijndael();
temp = cypher2.EncryptMessage(_viewModel.ChatInputText, _viewModel.Key);
break;
}
Message msg = new Message
{
Sender = _localClient.Name,
Time = DateTime.Now,
Content = temp
};
//If whisper mode is checked and an item is
//selected in the list box of clients, it will
//arrange a client object called receiver
//to whisper
if (_viewModel.WhisperBox)
{
if (_receiver != null)
{
_channel.WhisperAsync(msg, _receiver);
_viewModel.ChatInputText = "";
}
}
else
{
_channel.SayAsync(msg);
_viewModel.ChatInputText = "";
}
//Tell the service to tell back all clients that this client
//has just finished typing..
_channel.IsWritingAsync(null);
}
}
}
