//TODO doesnt work: may have to sync threads.
public static Boolean trade(ClientHandler oldOwner, ClientHandler newOwner, Stock stock)
{
Console.WriteLine(newOwner.getID() + " is in trade");
// UNCOMMENT FOR TESTING IF A TRADER DISCONNECTS MID-TRADE
/*
* try {
* Thread.sleep(10000);
* } catch (InterruptedException e) {
* e.printStackTrace();
* }
*/
lock (fileLock){
//ClientHandler oldOwner = stock.getOwner();
if (oldOwner == stock.getOwner())
{
//Check if the owner is also the buyer
if (stock.getOwner() == newOwner)
{
Console.WriteLine("stock owner: " + stock.getOwner().getID());
Console.WriteLine("new owner: " + newOwner.getID());
newOwner.sendMessage("Buy/Sell failed: cannot sell to owner.");
Console.WriteLine("There was an attempted trade of: " + stock.getName() + " but failed, because the owner tried to trade with themselves.");
return(false);
}
else
{
stock.setOwner(newOwner);
Console.WriteLine("new owner: " + stock.getOwner().getID());
//Check that new owner has been assigned
if (stock.getOwner() == newOwner)
{
if ((oldOwner.isConnected()) && (newOwner.isConnected())) //Check if traders are still connected before finalisation of trade.
{
String updateMsg = "[UPDATE]Stock is now owned by trader: " + Market.getStock("sample stock").getOwner().getID();
updateMarket(updateMsg);
return(true);
}
else
{
stock.setOwner(oldOwner);
Console.WriteLine("new owner offline");
return(false);
}
}
else
{
Console.WriteLine("Stock owner was unable to be changed.");
return(false);
}
}
}
else
{
Console.WriteLine("client: " + oldOwner.getID() + " tried to sell the stock, but are not the owner.");
return(false);
}
}
}
public void run()
{
try{
NetworkStream stream = socket.GetStream();
this.reader = new StreamReader(stream);
this.writer = new StreamWriter(stream);
String reconnection = "new connection"; //initiated to new connection
try {
reconnection = reader.ReadLine();
}catch (IOException e) {
Console.WriteLine("Error");
}
//If server restarted, client will send message reconnection with their previous ID, otherwise they're sent a new ID.
Console.WriteLine("reconection: " + reconnection);
if (reconnection.Equals("reconnection"))
{
this.ID = reader.ReadLine();
}
else if (reconnection.Equals("new connection"))
{
Console.WriteLine("Reconnection");
this.ID = Market.generateID().Replace("([ID])|\\s+", "");
sendMessage("[ID] " + this.ID);
}
Market.updateIDFile(this.ID);
/*
* if (!(reconnection.equals("new connection"))){ //user has reconnected
* this.ID = reconnection;
* Console.WriteLine("Client reconnected with ID: " + this.ID);
* }else{ //First time connection for user
* this.ID = Market.generateID();
* Console.WriteLine("Client connected with ID: " + this.ID);
* sendMessage(this.ID);
* }*/
//Add user to the Hashmap of connected traders.
Market.newConnection(this);
this.setConnected(true);
Console.WriteLine("User: "******" has connected to the server");
Market.updateMarket("[NEW_CONN]User: "******" has connected to the server");
String connectionsResponse; //Used to send connections status to client
Stock stock = Market.getStock("sample stock");
while (connected)
{
try{
String input = reader.ReadLine();
input = input.Replace("@", ""); //@ = ping signal and is not a valid character for any commands.
switch (Convert.ToString(input.ToLower()))
{
case "balance":
if (getBalance() != 0)
{
sendMessage("[UPDATE]" + Convert.ToString(getBalance()));
}
else
{
sendMessage("[WARNING] You do not own any stock.");
}
break;
case "buy":
//TODO Might have to go back to Market.trade as error is client side rather than serverside.
bool success = Market.trade(stock.getOwner(), this, stock);
if (success)
{
sendMessage("[WARNING]Trade successful");
}
else
{
sendMessage("[WARNING]Trade unsucessful");
}
break;
case "sell":
String IDtoSellTo = reader.ReadLine();
IDtoSellTo = IDtoSellTo.Replace("@", ""); //if any ping requests got mixed with the stream
IDtoSellTo = IDtoSellTo.Replace(" ", ""); //if any ping requests got mixed with the stream
ClientHandler clientToSellTo = Market.getClient(IDtoSellTo);
Console.WriteLine("Client to sell to: " + clientToSellTo);
bool sellSuccess = false;
if (clientToSellTo != null)
{
if (stock.getOwner() != clientToSellTo)
{
sellSuccess = Market.trade(this, clientToSellTo, stock);
}
else
{
Console.WriteLine("Trade unsucessful");
sendMessage("[WARNING] Trade unsucessful");
}
}
else
{
Console.WriteLine("ID to sell to: " + IDtoSellTo);
Console.WriteLine("Invalid client ID");
sendMessage("[WARNING]Invalid client ID to sell to");
}
if (sellSuccess)
{
Console.WriteLine("sending successul");
sendMessage("[UPDATE]Sell successful");
}
break;
case "status":
String message = "[UPDATE]Stock owned by trader: " + Market.getStock("sample stock").getOwner().getID();
Console.WriteLine("sending status message: " + message);
sendMessage(message);
break;
case "connections":
connectionsResponse = connectionsToString();
sendMessage(connectionsResponse);
break;
case "quit":
connected = false; // break out of while loop to catch statement: setConnected() runs the quit() function, so should not be used here.
break;
case "@": //Single character sent from the client every 5 seconds to see if the connection is still alive.
Console.WriteLine("ping detected.");
break;
case "": //Single character which acts as a ping when connection has been established.
break;
default:
Console.WriteLine("error input");
Console.WriteLine("input: " + input);
break;
}
//Handles client disconnecting
}catch (IOException e) {
this.setConnected(false);
}
}
}catch (IOException e) {
Console.WriteLine("Error establishing I/O stream");
}
}
