/// <summary>
/// Method for managing user actions
/// </summary>
/// <param name="socket"></param>
public void ProcessClient(object socket)
{
try
{
clientSocket = (Socket)socket;
networkStream = new NetworkStream(clientSocket);
BinaryReader = new BinaryReader(networkStream);
BunaryWriter = new BinaryWriter(networkStream);
//Authenticate the user
user = AuthenticateUser();
if (user != null)
{
while (clientSocket.Connected)
{
//While the connection is active process user action
if (!ProcessRequest())
{
//if user disconnects then close the socket connection
clientSocket.Close();
break;
}
}
}
else
{
//if user disconnects then close the socket connection
clientSocket.Close();
ProcessMessage(Constants.CONNECTION_CLOSED);
}
}
catch (Exception e)
{
if (ProcessError != null)
{
ProcessError(e.Message);
}
}
}
/// <summary>
/// Method to register new user
/// </summary>
/// <returns></returns>
private User RegisterUser()
{
string username;
string password;
UserRightsEnum rights = UserRightsEnum.None;
username = BinaryReader.ReadString();
password = BinaryReader.ReadString();
rights = (UserRightsEnum)BinaryReader.ReadInt32();
if (Users.Any(u => u.Username == username))
{
BunaryWriter.Write(string.Format(Constants.USERNAME_ALREADY_IN_USE, username));
return AuthenticateUser();
}
else
{
User newUser = new User(username, password, rights);
lock (Users)
{
Users.Add(newUser);
}
string message = string.Format(Constants.USER_SUCCESSFULLY_REGISTERED, username);
ProcessMessage(message);
BunaryWriter.Write(message);
return newUser;
}
}
/// <summary>
/// Method to login the user
/// </summary>
/// <returns></returns>
private User LoginUser()
{
string username;
string password;
User user;
try
{
username = BinaryReader.ReadString();
password = BinaryReader.ReadString();
user = Users.FirstOrDefault(u => u.Username == username && u.Password == password);
if (user != null)
{
ProcessMessage(string.Format(Constants.USER_LOGGED_IN, username));
BunaryWriter.Write(string.Format(Constants.WELLCOME_IN_THE_SYSTEM, username));
return user;
}
else
{
BunaryWriter.Write(Constants.USERNAME_OR_PASSWORD_INCORRECT);
}
}
catch (Exception e)
{
BunaryWriter.Write(e.Message);
}
return AuthenticateUser();
}
/// <summary>
/// Method for managing user actions
/// </summary>
/// <returns>True if user performs another action and False if user disconnects</returns>
private bool ProcessRequest()
{
//Get user action
ActionEnum currentAction = ((ActionEnum)BinaryReader.ReadInt32());
if (currentAction == ActionEnum.GenerateToken && (user.Rights == UserRightsEnum.GenerateToken || user.Rights == UserRightsEnum.All))
{
//Generate token if user has rights
GenerateToken();
}
else if (currentAction == ActionEnum.RequestCardNumber && (user.Rights == UserRightsEnum.Request || user.Rights == UserRightsEnum.All))
{
//request bank card number if user has rights
RequestCardId();
}
else if (currentAction == ActionEnum.Logout)
{
//Logout user from the sustem
ProcessMessage(string.Format(Constants.USER_HAS_LOGGED_OUT, user.Username));
this.user = null;
BunaryWriter.Write(true);
user = AuthenticateUser();
if(user == null)
return false;
}
else if (currentAction == ActionEnum.Disconnect)
{
//Disconnect client
ProcessMessage(string.Format(Constants.USER_HAS_DISCONNECTED, user.Username));
this.user = null;
return false;
}
else
{
//User has no rights
BunaryWriter.Write((int)ActionEnum.Denied);
}
//Operation completed successfully
return true;
}
/// <summary>
/// Copy constructor
/// </summary>
/// <param name="user"></param>
public User(User user)
: this(user.Username, user.Password, user.Rights)
{
}
