internal Realm(Realm parent, long id)
{
Parent = parent;
ID = id;
}
private void ChangeRealm(User user, long targetRealmID, bool createChildRealm)
{
// Don't do anything if the user is staying in the same realm
if ((user.Realm == null && targetRealmID == -1) ||
(user.Realm != null && user.Realm.ID == targetRealmID))
{
return;
}
// Child realms can only be created if user is currently in a realm
var oldRealm = user.Realm;
if (oldRealm == null && createChildRealm)
{
createChildRealm = false;
}
// Remove user from the old realm, informing everyone that the user has left it
if (oldRealm != null)
{
oldRealm.Users.Remove(user);
user.Realm = null;
foreach (var realmUser in oldRealm.Users)
{
Send(realmUser.EndPoint, "-" + user.ID);
}
}
// Get the target realm, creating it if necessary
var newRealm = (Realm)null;
if (targetRealmID != -1)
{
if (!realmsByID.TryGetValue(targetRealmID, out newRealm))
{
var parentRealm = createChildRealm ? oldRealm : null;
newRealm = new Realm(parentRealm, targetRealmID);
realmsByID.Add(targetRealmID, newRealm);
if (parentRealm != null)
{
parentRealm.ChildRealms.Add(newRealm);
}
}
// Add the user to the new realm
newRealm.Users.Add(user);
user.Realm = newRealm;
// Advise user that the new realm has been joined successfully
Send(user.EndPoint, (createChildRealm ? "&" : "^") + targetRealmID);
// Advise user of all child realms already existing in the new realm
foreach (var realm in newRealm.ChildRealms)
{
Send(user.EndPoint, "{" + realm.ID);
}
// Advise user of all other users already connected to that realm
var otherRealmUsers = newRealm.Users.Where(u => u != user).ToArray();
Send(user.EndPoint, "=" + string.Join(",", otherRealmUsers.Select(u => u.ID)));
// Advise everyone in the target realm that user has joined
foreach (var realmUser in otherRealmUsers)
{
Send(realmUser.EndPoint, "+" + user.ID);
}
}
// Advise everyone in the old realm that there is a new child realm
if (createChildRealm)
{
foreach (var realmUser in oldRealm.Users)
{
Send(realmUser.EndPoint, "{" + newRealm.ID);
}
}
// If there aren't any more users or child realms in the old realm then recursively destroy the old realm(s)
var currentRealm = oldRealm;
while (!createChildRealm && currentRealm != null && currentRealm.Users.Count == 0 && currentRealm.ChildRealms.Count == 0)
{
// Remove the realm from the parent's child list
if (currentRealm.Parent != null)
{
currentRealm.Parent.ChildRealms.Remove(currentRealm);
// Advise users of the parent realm that the child realm has been destroyed
foreach (var realmUser in currentRealm.Parent.Users)
{
Send(realmUser.EndPoint, "}" + currentRealm.ID);
}
}
// Remove realm data
if (currentRealm.ID >= Settings.Default.PublicRealmCount)
{
foreach (var fileName in Directory.GetFiles(".", "realm." + currentRealm.ID + ".*.entity"))
{
File.Delete(fileName);
}
}
// Remove the realm from the list
if (currentRealm.ID >= Settings.Default.PublicRealmCount)
{
reclaimableRealmIDs.Enqueue(currentRealm.ID);
}
realmsByID.Remove(currentRealm.ID);
// Move on to checking parent realm
currentRealm = currentRealm.Parent;
}
}