public PosterModel(User usr)
{
username = usr.username;
}
public ActionResult setUsername(string username)
{
//nothing is done if provided username is blank
if (username != "")
{
OnlineChatDBEntities db = new OnlineChatDBEntities();
//if an existing username is taken by session, set it as inactive
if (Session["username"] != null && username != Session["username"].ToString())
setUsernameInactive(Session["username"].ToString());
//if username doesn't currently exist, create it in the database
User target_user = db.Users.Where(u => u.username == username).FirstOrDefault();
if (target_user == null)
{
target_user = new User();
target_user.username = username;
target_user.is_session_active = false;
db.Users.Add(target_user);
}
//check if username is taken, if free, set session variable to username and session trait in db to true
if (!isUsernameTaken(username, db))
{
HttpContext.Session["username"] = username;
target_user.is_session_active = true;
db.SaveChanges();
return Json(username, JsonRequestBehavior.AllowGet);
}
}
return Json(false, JsonRequestBehavior.AllowGet);
}