/// <summary>
/// Creates the user.
/// </summary>
/// <param name="user">The user.</param>
/// <param name="password">The password.</param>
/// <param name="email">The email.</param>
/// <returns></returns>
/// <exception cref="Exception"></exception>
public User CreateUser(string user, string password, string email)
{
using (var db = new WeSketchDataContext())
{
if (db.Users.Any(existingUser => existingUser.UserName == user))
{
throw new Exception($"User {user} already exists.");
}
byte[] salt = GetSalt();
var userId = Guid.NewGuid();
var boardId = Guid.NewGuid();
var newUser = new User()
{
UserID = userId,
UserName = user,
Email = email,
Password = GetComputedHash(password, salt),
SeaSalt = Convert.ToBase64String(salt),
Disabled = false,
UserBoard = new UserBoard()
{
UserID = userId,
BoardID = boardId,
BoardOwner = true,
CanSketch = true
}
};
db.Users.InsertOnSubmit(newUser);
db.SubmitChanges();
return(db.Users.Single(usr => usr.UserName == user));
}
}
/// <summary>
/// Sends the strokes to the specieied user.
/// </summary>
/// <param name="serializedStrokes">The serialized strokes.</param>
/// <param name="userId">The user identifier.</param>
public void SendStrokesToUser(string user, string serializedStrokes)
{
using (var db = new WeSketchDataContext())
{
var receiver = db.Users.Single(usr => usr.UserName == user);
Clients.Group(receiver.UserID.ToString()).ReceiveStrokes(serializedStrokes);
}
}
/// <summary>
/// Notifies the specified user that they have been kicked from the board.
/// </summary>
/// <param name="userName">User name of the user to kick from the board.</param>
/// <param name="boardId">The board identifier that the user is being kicked from.</param>
public void KickUserFromBoard(string userName, Guid boardId)
{
using (var db = new WeSketchDataContext())
{
var user = db.Users.Single(usr => usr.UserName == userName);
Clients.Group(user.UserID.ToString()).KickedFromBoard(boardId);
}
}
/// <summary>
/// Sends the connected users to the specified user.
/// </summary>
/// <param name="user">The user to send the users to.</param>
/// <param name="users">The users.</param>
public void SendConnectedUsersToUser(string user, string users)
{
using (var db = new WeSketchDataContext())
{
var receiver = db.Users.Single(usr => usr.UserName == user);
Clients.Group(receiver.UserID.ToString()).ReceiveConnectedUsers(users);
}
}
/// <summary>
/// After a user joins a board they request strokes from a board.
/// </summary>
/// <param name="user">The user identifier.</param>
/// <param name="boardId">The board identifier.</param>
public void RequestStrokes(string user, Guid boardId)
{
using (var db = new WeSketchDataContext())
{
var board = db.UserBoards.Single(brd => brd.BoardID == boardId && brd.BoardOwner);
Clients.Group(board.UserID.ToString()).ReceiveStrokeRequest(user);
}
}
/// <summary>
/// Remove user from board group
/// </summary>
/// <param name="userName"></param>
/// <param name="boardId"></param>
public void RemoveFromGroups(string userName, Guid boardId)
{
using (var db = new WeSketchDataContext())
{
var user = db.Users.Single(usr => usr.UserName == userName);
Groups.Remove(Context.ConnectionId, user.UserID.ToString());
}
Groups.Remove(Context.ConnectionId, boardId.ToString());
}
/// <summary>
/// After a user joins a board they request the connected users from a board.
/// </summary>
/// <param name="user">The user identifier.</param>
/// <param name="boardId">The board identifier.</param>
public void RequestConnectedUsers(string user, Guid boardId)
{
using (var db = new WeSketchDataContext())
{
var board = db.UserBoards.Single(brd => brd.BoardID == boardId && brd.BoardOwner);
var receiver = db.Users.Single(usr => usr.UserName == user);
Clients.Group(board.UserID.ToString()).ReceiveConnectedUsersRequest(user);
}
}
/// <summary>RequestConnectedUsers
/// Joins the user to the board group. This allows the userto receive strokes sent to the group.
/// </summary>
/// <param name="userName">Name of the user.</param>
/// <param name="color">The color currently assigned to the user.</param>
/// <param name="boardId">The board identifier.</param>
public void JoinBoardGroup(string userName, string color, Guid boardId)
{
Groups.Add(Context.ConnectionId, boardId.ToString());
using (var db = new WeSketchDataContext())
{
var user = db.Users.Single(usr => usr.UserName == userName);
Clients.Group(boardId.ToString()).UserJoinedBoard(JsonConvert.SerializeObject(new ConnectedUser()
{
UserName = userName,
Color = color,
Owner = boardId == user.UserBoard.BoardID
}));
}
}
/// <summary>
/// Leaves the board group.
/// </summary>
/// <param name="userName">Name of the user.</param>
/// <param name="boardId">The board identifier.</param>
public void LeaveBoardGroup(string userName, Guid boardId, string color)
{
Groups.Remove(Context.ConnectionId, boardId.ToString());
using (var db = new WeSketchDataContext())
{
var user = db.Users.Single(usr => usr.UserName == userName);
Groups.Add(Context.ConnectionId, user.UserBoard.BoardID.ToString());
if (boardId != user.UserBoard.BoardID)
{
Clients.Group(user.UserID.ToString()).UserBoardSetToDefault(user.UserBoard.BoardID, true);
}
Clients.Group(user.UserBoard.BoardID.ToString()).UserJoinedBoard(JsonConvert.SerializeObject(new ConnectedUser()
{
UserName = userName,
Color = color,
Owner = true
}));
}
Clients.Group(boardId.ToString()).UserLeftBoard(userName);
}
/// <summary>
/// Logins the specified user.
/// </summary>
/// <param name="user">The user.</param>
/// <param name="password">The password.</param>
/// <returns></returns>
public User Login(string user, string password)
{
string errorMessage = "Invalid credentials";
using (var db = new WeSketchDataContext())
{
db.DeferredLoadingEnabled = false;
var existingUser = db.Users.SingleOrDefault(eUser => eUser.UserName == user);
if (existingUser == null)
{
db.SubmitChanges();
throw new Exception(errorMessage);
}
existingUser.LastLoginAttempt = DateTime.Now;
HashAlgorithm algorithm = new SHA256Managed();
if (password == string.Empty)
{
throw new Exception(errorMessage);
}
byte[] attemptBytes = GetSeasonedPasswordBytes(password,
Convert.FromBase64String(existingUser.SeaSalt),
Encoding.UTF8.GetBytes(ConfigurationManager.AppSettings["pepper"]));
byte[] attemptHash = algorithm.ComputeHash(attemptBytes);
byte[] existingHash = Convert.FromBase64String(existingUser.Password);
if (!attemptHash.SequenceEqual(existingHash))
{
db.SubmitChanges();
throw new Exception(errorMessage);
}
existingUser.LastLogin = DateTime.Now;
db.SubmitChanges();
existingUser.UserBoard = db.UserBoards.Single(brd => brd.UserID == existingUser.UserID);
return(existingUser);
}
}
