/// <summary>
/// When the method is called with no arguments, just return the view
/// When argument logOn is true, a user logged on
/// When argument logOff is true, a user closed their browser or navigated away (log off)
/// When argument chatMessage is specified, the user typed something in the chat
/// </summary>
public ActionResult Index(bool? logOn, bool? logOff, string chatMessage)
{
string UserID = User.Identity.GetUserId();
if (UserID != null)
{
try
{
if (chatModel == null) chatModel = new ChatModel();
ChatModel.ChatUser currentUser = chatModel.Users.FirstOrDefault(u => u.ChatUserID == User.Identity.GetUserId());
if (logOn != null && (bool)logOn)
{
return CheckLoggedInUser(UserID, chatModel);
}
else if (logOff != null && (bool)logOff)
{
LogOffUser(chatModel.Users.FirstOrDefault(u => u.ChatUserID == User.Identity.GetUserId()));
ChatViewModel chatViewModel = new ChatViewModel();
chatViewModel.Users = chatModel.Users;
chatViewModel.ChatHistory = currentUser.ChatHistory;
return PartialView("Lobby", chatViewModel);
}
else
{
//remember each user's last ping time
currentUser.LastPing = DateTime.Now;
#region remove inactive users
RemoveInactiveUsers(chatModel);
#endregion
#region if there is a new message, append it to the chat
if (!string.IsNullOrEmpty(chatMessage))
{
AddMessage(UserID, chatMessage, chatModel);
}
#endregion
ChatViewModel chatViewModel = new ChatViewModel();
chatViewModel.Users = chatModel.Users;
chatViewModel.ChatHistory = currentUser.ChatHistory;
return PartialView("ChatHistory", chatViewModel);
}
}
catch (Exception ex)
{
//return error to AJAX function
Response.StatusCode = 500;
return Content(ex.Message);
}
}
else
{
return View();
}
}
/// <summary>
/// Remove this user from the lobby
/// </summary>
/// <param name="user"></param>
public static void LogOffUser(ChatModel.ChatUser user)
{
ChatModel.ChatUser userToRemove = null;
if (chatModel != null)
{
foreach (ChatModel.ChatUser aUser in chatModel.Users)
{
if (aUser.ChatUserID.Equals(user.ChatUserID))
{
userToRemove = aUser;
}
}
chatModel.Users.Remove(userToRemove);
}
}
private ActionResult CheckLoggedInUser(string UserID, ChatModel chatModel)
{
if (chatModel.Users.FirstOrDefault(u => u.ChatUserID == User.Identity.GetUserId()) == null)
{
#region create new user and add to lobby
ChatModel.ChatUser currentUser = new ChatModel.ChatUser()
{
ChatUserID = UserID,
Name = User.Identity.GetUserName(),
LoggedOnTime = DateTime.Now,
LastPing = DateTime.Now
};
chatModel.Users.Add(currentUser);
//stored procedure select
MySqlConnection selectConn = new MySqlConnection();
selectConn.CreateConn();
SqlCommand command = new SqlCommand("GetChatMessages", selectConn.Connection);
command.CommandType = System.Data.CommandType.StoredProcedure;
command.Parameters.Add(new SqlParameter("@UserID", UserID));
selectConn.DataReader = command.ExecuteReader();
while (selectConn.DataReader.Read())
{
currentUser.ChatHistory.Add(new ChatModel.ChatMessage
{
Message = selectConn.DataReader["MessageContent"].ToString(),
Username = selectConn.DataReader["UserName"].ToString()
});
}
#endregion
}
ChatModel.ChatUser curUser = chatModel.Users.FirstOrDefault(u => u.ChatUserID == User.Identity.GetUserId());
ChatViewModel chatViewModel = new ChatViewModel();
chatViewModel.Users = chatModel.Users;
chatViewModel.ChatHistory = curUser.ChatHistory;
return PartialView("Lobby", chatViewModel);
}
private void RemoveInactiveUsers(ChatModel chatModel)
{
List<ChatModel.ChatUser> removeThese = new List<ChatModel.ChatUser>();
foreach (Models.ChatModel.ChatUser usr in chatModel.Users)
{
TimeSpan span = DateTime.Now - usr.LastPing;
if (span.TotalSeconds > 15)
removeThese.Add(usr);
}
foreach (ChatModel.ChatUser usr in removeThese)
{
LogOffUser(usr);
}
}
private void AddMessage(string UserID, string chatMessage, ChatModel chatModel)
{
DateTime currentTime = DateTime.Now;
MySqlConnection conn = new MySqlConnection();
conn.CreateConn();
SqlCommand cmd = new SqlCommand("AddChatMessage", conn.Connection);
cmd.CommandType = System.Data.CommandType.StoredProcedure;
cmd.Parameters.Add(new SqlParameter("@UserId", UserID));
cmd.Parameters.Add(new SqlParameter("@MessageContent", chatMessage));
cmd.Parameters.Add(new SqlParameter("@TimeReceived", currentTime));
conn.Command = cmd;
conn.Command.Prepare();
conn.Command.ExecuteNonQuery();
foreach (ChatModel.ChatUser usr in chatModel.Users)
{
SqlCommand cmd2 = new SqlCommand("AddReceivedMessage", conn.Connection);
cmd2.CommandType = System.Data.CommandType.StoredProcedure;
cmd2.Parameters.Add(new SqlParameter("@ReceivedUserID", usr.ChatUserID));
cmd2.Parameters.Add(new SqlParameter("@MessageContent", chatMessage));
cmd2.Parameters.Add(new SqlParameter("@CurrentTime", currentTime));
conn.Command = cmd2;
conn.Command.Prepare();
conn.Command.ExecuteNonQuery();
usr.ChatHistory.Add(new ChatModel.ChatMessage { Message = chatMessage, Username = User.Identity.Name });
}
conn.CloseConn();
}