public string ParseMessage(string Message)
{
int UserID;
String Type;
String Contents;
try
{
Type = Message.Substring(0, 4);
Console.WriteLine("Message type " + Type);
if (Message.Substring(4, 4) == "0000")
{
UserID = 0;
}
else
{
UserID = int.Parse((Message.Substring(4, 4)).TrimStart('0'));
}
Contents = Message.Substring(8);
Console.WriteLine("User Id: " + UserID.ToString());
Console.WriteLine("Message: " + Contents);
}
catch
{
return("Message Not Accepted");
}
if (Type != "PING" && UserID != 0 && !UserDict.ContainsKey(UserID))
{
return("User ID not accepted, message not processed");
}
switch (Type)
{
case "NWID":
Console.WriteLine("New ID");
if (UserID != 0 && UserDict.ContainsKey(UserID))
{
return(UserID.ToString());
}
else
{
for (int i = 1; i < 1000; i++)
{
if (!UserDict.ContainsKey(i))
{
UserDict.Add(i, new UserData(i, Contents, new List <String>()));
return(i.ToString());
}
}
}
break;
case "CHLS":
Console.WriteLine("List Channels");
string output = "";
foreach (String Name in ChannelDict.Keys)
{
output = output + Name + ",";
}
output.Trim(',');
return(output);
case "CRCH":
Console.WriteLine("Create Channel");
if (ChannelDict.ContainsKey(Contents.Trim()))
{
return("Already Exists");
}
else
{
ChannelDict.Add(Contents.Trim(),
new ChannelData(Contents.Trim(),
"Channel " + Contents.Trim() + " Started by " + UserDict[UserID].Alias + "\n",
new List <int>()));
ChannelDict[Contents.Trim()].Members.Add(UserID);
return("Channel Created");
}
case "JNCH":
Console.WriteLine("Join Channel");
if (ChannelDict.ContainsKey(Contents.Trim()))
{
if (!ChannelDict[Contents.Trim()].Members.Contains(UserID))
{
ChannelDict[Contents.Trim()].Members.Add(UserID);
}
if (!UserDict[UserID].Channels.Contains(Contents.Trim()))
{
UserDict[UserID].Channels.Add(Contents.Trim());
}
return(ChannelDict[Contents.Trim()].Messages);
}
else
{
return("Channel Does Not Exist");
}
case "LVCH":
Console.WriteLine("Leave Channel");
if (!ChannelDict.ContainsKey(Contents.Trim()))
{
return("Channel Does Not Exist");
}
if (UserDict[UserID].Channels.Contains(Contents.Trim()))
{
UserDict[UserID].Channels.Remove(Contents.Trim());
}
if (ChannelDict[Contents.Trim()].Members.Contains(UserID))
{
ChannelDict[Contents.Trim()].Members.Remove(UserID);
}
return("User is no longer in channel " + Contents.Trim());
case "CHCH":
Console.WriteLine("Channel History");
if (ChannelDict.ContainsKey(Contents.Trim()))
{
if (ChannelDict[Contents.Trim()].Members.Contains(UserID))
{
return(ChannelDict[Contents.Trim()].Messages);
}
else
{
return("User is not a member of this channel");
}
}
else
{
return("Channel Does not exist");
}
case "MEMB":
Console.WriteLine("Member List");
if (ChannelDict.ContainsKey(Contents.Trim()))
{
if (ChannelDict[Contents.Trim()].Members.Contains(UserID))
{
string members = "";
foreach (int UserInt in ChannelDict[Contents.Trim()].Members)
{
members = members + UserDict[UserInt].Alias + ", ";
}
members.Trim();
members.Trim(',');
return(members);
}
else
{
return("User is not a member of this channel");
}
}
else
{
return("Channel Does not exist");
}
case "PING":
Console.WriteLine("Ping");
return("Hello Client!");
case "MECH":
Console.WriteLine("Message Channel");
String ChatMessage;
String ChannelName;
ChannelName = Contents.Substring(0, Contents.IndexOf(','));
ChatMessage = Contents.Substring(Contents.IndexOf(',') + 1);
if (!ChannelDict.ContainsKey(ChannelName))
{
return("Channel dosen't exist");
}
ChannelDict[ChannelName].Messages = ChannelDict[ChannelName].Messages + UserDict[UserID].Alias + ": " + ChatMessage + "\n";
return(ChannelDict[ChannelName.Trim()].Messages);
case "GBYE":
Console.WriteLine("Disconnect");
foreach (ChannelData Channel in ChannelDict.Values)
{
if (Channel.Members.Contains(UserID))
{
Channel.Members.Remove(UserID);
}
}
UserDict.Remove(UserID);
return("Bye!");
default:
Console.WriteLine("No Command");
return("Message Type not Recognised");
}
return("");
}
