} // login command
// function that try login and produces the changes acordingly (change to main window or warn the user about the error)
private void Login(object parameter)
{
// get password
PasswordBox pBox = parameter as PasswordBox;
string password = pBox.Password;
if (Username.Length == 0 || password.Length == 0) // if one of the fields isn't fulfilled
{
MessageBox.Show(Application.Current.MainWindow, "Provide username and password in order to login!", "Missing fields", MessageBoxButton.OK, MessageBoxImage.Error);
}
else if (client.Login(Username, Encrypt(password))) // if succesfully logged
{
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.Login, null), "DEFAULT");
}
else // else
{
if (!noserver) // wrong login info or already logged
{
MessageBox.Show(Application.Current.MainWindow, "Wrong user/password information or already logged in.\nPlease try again!", "Wrong login", MessageBoxButton.OK, MessageBoxImage.Error);
}
else // can't reach server
{
MessageBox.Show(Application.Current.MainWindow, "Can't reach server! Exiting Application!", "No server", MessageBoxButton.OK, MessageBoxImage.Exclamation);
Environment.Exit(-1);
}
}
}
// function that performs the logout on server
internal void Logout()
{
try
{
if (this.user != null) // if not already logged out
{
// logout in server
diginoteSystem.Logout(user);
// unsubscribe changes
evRepeater.ChangeEvent -= ChangeHandler;
diginoteSystem.ChangeEvent -= evRepeater.Repeater;
// reset data
user = null;
Quotation = 0.0;
Diginotes = null;
Orders = null;
QuotationEvolution = null;
TransactionsPerMin = null;
}
}
catch
{
// couldn't reach server
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.NoServer, null), "");
}
}
// function that gets the statistics information in the server
internal void GetStatistics()
{
try
{
// initialize lists
QuotationEvolution = new ObservableCollection <DataPoint>();
TransactionsPerMin = new ObservableCollection <DataPoint>();
// add stats to the list
foreach (Pair <DateTime, double> pair in diginoteSystem.GetQuotationEvolution())
{
QuotationEvolution.Add(new DataPoint(DateTimeAxis.ToDouble(pair.first), pair.second));
}
// add stats to the list
foreach (Pair <DateTime, int> pair in diginoteSystem.GetTransactionsPerMin())
{
TransactionsPerMin.Add(new DataPoint(DateTimeAxis.ToDouble(pair.first), pair.second));
}
}
catch
{
// couldn't reach server
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.NoServer, null), "");
}
}
// function that performs the logout
private void Logout(object parameter)
{
// stop diggings
StopDigging();
// logout
client.Logout();
// notify
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.LogOut, null), "");
}
// function that shows the user the dialog to approve keeping an order after login
private void QueryApproval(object sender, EventArgs e)
{
// stop the timer
DispatcherTimer timer = (DispatcherTimer)sender;
timer.Tick -= QueryApproval;
timer.Stop();
// notify main window to show the dialog
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.AskApprove, null), "");
}
// function that gets the time to dig a new diginote
internal void GetDigSeed()
{
try
{
// get time
DigTime = diginoteSystem.GetDigtime();
}
catch
{
// couldn't reach server
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.NoServer, null), "");
}
}
// function that suggests the new quotation in the server
internal void SetNewQuotation(double value)
{
try
{
// suggest quotation
diginoteSystem.SuggestNewQuotation(user, value);
}
catch
{
// couldn't reach server
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.NoServer, null), "");
}
}
// function that warns main window to show change quotation dialog to user
private void ChangeQuotation(object parameter)
{
// get operation
string operation = parameter as string;
// show the dialog with the correct parameter
if (operation == "Lower")
{
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.AskQuotation, null), "-" + Quotation);
}
else
{
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.AskQuotation, null), "+" + Quotation);
}
}
// function that add a new buy order in server
internal void BuyDiginotes(int quantity)
{
try
{
// add sell order in server and add the returned order to orders list
Orders.Insert(0, diginoteSystem.AddBuyOrder(user, quantity, OrderType.Buy));
// notify udpdate
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.Order, null), "");
}
catch
{
// couldn't reach server
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.NoServer, null), "");
}
}
// function that gets the information about diginotes owned by the logged user in the server
internal void GetDiginotes()
{
try
{
// initialize list
Diginotes = new ObservableCollection <DiginoteInfo>();
// get diginotes info and adds them to the list
diginoteSystem.DiginotesFromUser(user).ForEach(Diginotes.Add);
}
catch
{
// couldn't reach server
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.NoServer, null), "");
}
}
// function that performs the registration on server
internal bool Register(string name, string user, string password)
{
try
{
if (diginoteSystem.RegisterUser(name, user, password)) // try register in server
{
// if success then login
Login(user, password);
return(true);
}
}
catch
{
// couldn't reach server
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.NoServer, null), "");
}
return(false);
}
// function that performs the login on server
internal bool Login(string user, string password)
{
try
{
Pair <bool, User> result = diginoteSystem.Login(user, password); // try login in server
if (result.first)
{
// set user
this.user = result.second;
// get actual quotation
Quotation = diginoteSystem.GetQuotation();
// get diginotes
GetDiginotes();
// get orders
GetOrders();
// get info
GetInfo();
// get statistics
GetStatistics();
// subscribe changes
evRepeater.ChangeEvent += ChangeHandler;
diginoteSystem.ChangeEvent += evRepeater.Repeater;
// return success
return(true);
}
}
catch
{
// couldn't reach server
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.NoServer, null), "DEFAULT");
}
return(false);
}
// function that gets the information about system in the server
internal void GetInfo()
{
try
{
// get info
Tuple <int, int, int, int, int> info = diginoteSystem.GetSystemInfo();
// set data
NumUsers = info.Item1;
NumLoggedUsers = info.Item2;
NumSysDiginotes = info.Item3;
DiginotesOffer = info.Item4;
DiginotesDemand = info.Item5;
}
catch
{
// couldn't reach server
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.NoServer, null), "");
}
}
// function that gets the new diginote digged and the new time needed to dig another diginote
internal void GetDiginoteDigged()
{
try
{
if (user != null) // if not already logged out
{
// add new diginote
Diginotes.Add(diginoteSystem.DigDiginote(user));
// notify update because we have a new diginote
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.Diginotes, null), "");
// get new time needed to dig
DigTime = diginoteSystem.GetDigtime();
}
}
catch
{
// couldn't reach server
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.NoServer, null), "");
}
}
// function that gets orders made by the logged user in the server
internal void GetOrders()
{
try
{
// initialize list
Orders = new ObservableCollection <Order>();
// get the orders
List <Order> reversed = diginoteSystem.OrdersFromUser(user);
// reverse
reversed.Reverse();
// adds them to the list
reversed.ForEach(Orders.Add);
}
catch
{
// couldn't reach server
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.NoServer, null), "");
}
}
// function that sends the approval or disapproval of keeping an order active to the server
internal void ChangeQuotationApproval(bool approve)
{
try
{
// get last order
Order lastOrder = Orders[0];
// send approval to the server
Order changedOrder = diginoteSystem.ReceiveApproval(user, lastOrder, approve);
// update list with the changed order, we need to remove and add to cast the listview update
Orders.Remove(lastOrder);
Orders.Insert(0, changedOrder);
// notify update
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.Order, null), "");
}
catch
{
// couldn't reach server
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.NoServer, null), "");
}
}
// handler for incoming messenger notifications
private void NotificationMessageHandler(NotificationMessage <NotificationType> msg)
{
if (msg.Content.Type == NotifType.LogOut) // logout
{
// open login window
new LoginWindow().Show();
// unregister
Messenger.Default.Unregister <NotificationMessage <NotificationType> >(this);
// close current
this.Close();
}
else if (msg.Content.Type == NotifType.AskQuotation) // ask user for new quotation
{
double quot = Double.Parse(msg.Notification); // get value
// create new dialog
ChangeQuotationDialog dialog = new ChangeQuotationDialog(this, Math.Abs(quot), quot >= 0);
if (dialog.ShowDialog() == true) // show dialog, if user clicks ok then suggest new quotation
{
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.SetQuotation, null), dialog.NewQuotation.ToString());
}
}
else if (msg.Content.Type == NotifType.AskApprove) // ask user to approve keeping the offer and send to server the result
{
if (new ApproveChangeDialog(this, 60d).ShowDialog() == true)
{
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.ApproveQuotation, null), "Approve");
}
else
{
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.ApproveQuotation, null), "Disapprove");
}
}
}
} // register command
// function that try resgiter and produces the changes acordingly (change to main window or warn the user about the error)
private void Register(object parameter)
{
// get passwords
Tuple <PasswordBox, PasswordBox> param = parameter as Tuple <PasswordBox, PasswordBox>;
string password = ((PasswordBox)param.Item1).Password;
string passwordConfirm = ((PasswordBox)param.Item2).Password;
if (UsernameRegister == "" || NameRegister == "" || password == "" || passwordConfirm == "") // if one of the fields isn't fulfilled
{
MessageBox.Show(Application.Current.MainWindow, "Please provide all fields in order to register!", "Missing fields", MessageBoxButton.OK, MessageBoxImage.Error);
}
else if (UsernameRegister.Length < 3) // if username is too short
{
MessageBox.Show(Application.Current.MainWindow, "Your username must at least 3 characters!", "Bad username", MessageBoxButton.OK, MessageBoxImage.Error);
}
else if (password != passwordConfirm) // if passwords don't match
{
MessageBox.Show(Application.Current.MainWindow, "Passwords don't match! Please make to confirm your password!", "Wrong passwords", MessageBoxButton.OK, MessageBoxImage.Error);
}
else if (client.Register(NameRegister, UsernameRegister, Encrypt(password))) // if successfully logged
{
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.Login, null), "DEFAULT");
}
else // else
{
if (!noserver) // username already taken
{
MessageBox.Show(Application.Current.MainWindow, "Username already taken! Please choose another username!", "Username taken", MessageBoxButton.OK, MessageBoxImage.Error);
}
else // can't reach server
{
MessageBox.Show(Application.Current.MainWindow, "Can't reach server! Exiting Application!", "No server", MessageBoxButton.OK, MessageBoxImage.Exclamation);
Environment.Exit(-1);
}
}
}
// handler for incoming messenger notifications
private void ChangeHandler(ChangeArgs args)
{
if (args.User1 == null || args.User1 == user.Username || args.User2 == user.Username) // if the logged user can receive the message
{
if (args.Type == ChangeType.QuotationUp || args.Type == ChangeType.QuotationDown) // quotation changed
{
App.Current.Dispatcher.Invoke((System.Action)(() =>
{
// set new quotation value
Quotation = args.QuotationValue;
// notify change
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.Quotation, null), "");
// add new stat
QuotationEvolution.Add(new DataPoint(DateTimeAxis.ToDouble(args.QuotationStat.first), args.QuotationStat.second));
if (Orders.Count > 0 && Orders[0].State == OrderState.Pending) // if last order is pending
{
if (args.User2 != user.Username &&
((args.Type == ChangeType.QuotationUp && Orders[0].Type == OrderType.Buy) ||
(args.Type == ChangeType.QuotationDown && Orders[0].Type == OrderType.Sell)))
// if the new quotation needs to be appproved by the user
{
// get last order
Order lastOrder = Orders[0];
// remove and set new state
Orders.Remove(lastOrder);
lastOrder.State = OrderState.WaitApproval;
// add to the list, we need to remove and add to cast the listview update
Orders.Insert(0, lastOrder);
// notify main window to show approve dialog
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.AskApprove, null), "");
}
}
}));
}
else if (args.Type == ChangeType.Transaction) // transaction occurred
{
App.Current.Dispatcher.Invoke((System.Action)(() =>
{
// get last order
Order lastOrder = Orders[0];
// remove order
Orders.Remove(lastOrder);
if (args.User1 == user.Username) // if the user logged sold the diginotes
{
// insert the changed order, we need to remove and add to cast the listview update
Orders.Insert(0, args.Order1);
// look for and remove the diginotes traded
List <DiginoteInfo> toRemove = new List <DiginoteInfo>();
foreach (DiginoteInfo dInfo in Diginotes)
{
if (args.DiginotesTraded.Exists(d => d.Serial == dInfo.Serial))
{
toRemove.Add(dInfo);
}
}
foreach (DiginoteInfo dInfo in toRemove)
{
Diginotes.Remove(dInfo);
}
}
else if (args.User2 == user.Username) // if the user logged bought the diginotes
{
// insert the changed order, we need to remove and add to cast the listview update
Orders.Insert(0, args.Order2);
// add the diginotes traded
args.DiginotesTraded.ForEach(Diginotes.Add);
}
// update transaction statistics
if (TransactionsPerMin.Count > 0)
{
DataPoint lastStatItem = TransactionsPerMin[TransactionsPerMin.Count - 1];
if (lastStatItem.X == DateTimeAxis.ToDouble(args.TransactionStat.first))
{
TransactionsPerMin.Remove(lastStatItem);
lastStatItem.Y++;
TransactionsPerMin.Add(lastStatItem);
}
else
{
TransactionsPerMin.Add(new DataPoint(DateTimeAxis.ToDouble(args.TransactionStat.first), args.TransactionStat.second));
}
}
else
{
TransactionsPerMin.Add(new DataPoint(DateTimeAxis.ToDouble(args.TransactionStat.first), args.TransactionStat.second));
}
// notify changes
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.Transaction, null), "");
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.Diginotes, null), "");
// if the order of the logged user wasn't totally satifiest, notify main window to show the dialog to ask for a new quotation
if (Orders[0].Quantity != 0)
{
if (Orders[0].Type == OrderType.Buy)
{
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.AskQuotation, null), "+" + Quotation);
}
else
{
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.AskQuotation, null), "-" + Quotation);
}
}
}));
}
else if (args.Type == ChangeType.Login) // login occurred
{
// set data
NumUsers = args.NumUsers;
NumLoggedUsers = args.NumLoggedUsers;
NumSysDiginotes = args.NumSysDiginotes;
// notify update
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.SystemInfo, null), "");
}
else if (args.Type == ChangeType.Logout) // logout occurred
{
// set data
NumLoggedUsers = args.NumLoggedUsers;
// notify update
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.SystemInfo, null), "");
}
else if (args.Type == ChangeType.SysDiginotes) // update on number of diginotes in system
{
// set data
NumSysDiginotes = args.NumSysDiginotes;
// notify update
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.SystemInfo, null), "");
}
else if (args.Type == ChangeType.OfferDemand) // update in number of diginotes to buy or sell
{
// set data
DiginotesOffer = args.DiginotesOffer;
DiginotesDemand = args.DiginotesDemand;
// notify update
NotificationMessenger.sendNotification(this, new NotificationType(NotifType.SystemInfo, null), "");
}
}
}
