/*
* Users SHOULD be able to:
* Request object creation and assign the object to themselves
* Request object ownership change of others' objects if the object is unlocked
* Request object deletion of their own objects
*
*
* Users SHOULD NOT be able to:
* Request object deletion of others' objects
* Create objects and make other players the owner
* Request object ownership change of others' objects if the object is locked
* Request changing objects' objectID, prefabID, or any other
*
*/
public void ConsiderChangeRequest(MeshPacket p)
{
if (GetAuthorized() == false)
{
Debug.LogError("Being asked to change the database when not authorized!");
return;
}
if (LookupPlayer(p.GetSourcePlayerId()) == null)
{
Debug.LogError("Change request source player does not exist on the database");
return;
}
StateChangeTransaction transaction = StateChangeTransaction.ParseSerializedBytes(p.GetContents());
if (transaction.GetChangeType() == StateChange.Addition)
{
//Check if the desired owner is the packet sender
if (p.GetSourcePlayerId() != transaction.GetObjectData().GetOwnerID())
{
Debug.LogError("Requested object creation tries to assign to new player: prohibited");
return;
}
DatabaseChangeResult result = AddObject(transaction.GetObjectData(), true);
if (result.success == false)
{
Debug.LogError("Requested object addition failed: " + result.error);
return;
}
else
{
game.SpawnObject(result.data);
EchoChangeRequest(transaction.GetTransactionID(), result.data, p.GetSourcePlayerId());
}
}
else if (transaction.GetChangeType() == StateChange.Removal)
{
//Check if requesting user owns the object
if (p.GetSourcePlayerId() != transaction.GetObjectData().GetOwnerID())
{
Debug.LogError("User trying to remove an object that doesn't belong to them");
return;
}
MeshNetworkIdentity localObjectToRemove = LookupObject(transaction.GetObjectData().GetObjectID());
if (localObjectToRemove == null)
{
Debug.LogError("Couldn't find the object requested to be removed.");
return;
}
DatabaseChangeResult result = RemoveObject(LookupObject(transaction.GetObjectData().GetObjectID()), true);
if (result.success == false)
{
Debug.LogError("Requested object removal failed: " + result.error);
return;
}
else
{
game.RemoveObject(result.data);
EchoChangeRequest(transaction.GetTransactionID(), localObjectToRemove.GetObjectID(), p.GetSourcePlayerId());
}
}
else if (transaction.GetChangeType() == StateChange.Change)
{
if (p.GetSourcePlayerId() != transaction.GetObjectData().GetOwnerID())
{
Debug.LogError("User trying to change an object that doesn't belong to them");
return;
}
MeshNetworkIdentity localObjectToChange = LookupObject(transaction.GetObjectData().GetObjectID());
if (localObjectToChange == null)
{
Debug.LogError("Couldn't find the object requested to be changed.");
return;
}
DatabaseChangeResult result = ChangeObject(LookupObject(transaction.GetObjectData().GetObjectID()), true);
if (result.success == false)
{
Debug.LogError("Requested object change failed: " + result.error);
return;
}
else
{
EchoChangeRequest(transaction.GetTransactionID(), localObjectToChange.GetObjectID(), p.GetSourcePlayerId());
}
}
}
//This is called when the authorized database sends an update to this database.
//If this object is the authorized database, this should never be called.
public void ReceiveDeltaUpdate(DatabaseUpdate dbup)
{
//TODO: Write safe methods for local addition/deletion etc
//TODO: Make sure that network and local references are not confused (StateChange.Change)
//TODO: Refactor "override" full update system so that omissions are meaningful
foreach (Player p in dbup.playerDelta.Keys)
{
if (dbup.playerDelta[p] == StateChange.Addition)
{
AddPlayer(p, false);
}
else if (dbup.playerDelta[p] == StateChange.Removal)
{
RemovePlayer(p, false);
}
else if (dbup.playerDelta[p] == StateChange.Change)
{
playerList[p.GetUniqueID()].DeepCopyAndApply(p);
}
else if (dbup.playerDelta[p] == StateChange.Override) //Probably coming from a FullUpdate
{
Debug.LogError("Received an override update inside a delta update");
}
}
foreach (MeshNetworkIdentity i in dbup.objectDelta.Keys)
{
if (dbup.objectDelta[i] == StateChange.Addition)
{
//If the incoming object is the database, we don't want to create it
//(because this script is running off of the already created database!)
//We only want to create a recursive link.
if (i.GetObjectID() == (ushort)ReservedObjectIDs.DatabaseObject)
{
DatabaseChangeResult result = AddObject(GetIdentity(), false);
if (result.success)
{
Debug.Log("Successfully added database to database: recursive link achieved");
}
}
else
{
DatabaseChangeResult result = AddObject(i, false);
if (result.success)
{
game.SpawnObject(i.GetObjectID());
}
}
}
else if (dbup.objectDelta[i] == StateChange.Removal)
{
DatabaseChangeResult result = RemoveObject(i, false);
if (result.success)
{
game.RemoveObject(i.GetObjectID());
}
}
else if (dbup.objectDelta[i] == StateChange.Change)
{
objectList[i.GetObjectID()].DeepCopyAndApply(i);
}
else if (dbup.objectDelta[i] == StateChange.Override) //Probably coming from a FullUpdate
{
Debug.LogError("Received an override update inside a delta update");
}
}
ushort check = GenerateDatabaseChecksum(playerList, objectList);
if (check != dbup.fullHash)
{
Debug.Log("Database checksum doesn't match: " + check + " vs " + dbup.fullHash + ". Requesting full update.");
MeshPacket p = new MeshPacket(new byte[0], PacketType.FullUpdateRequest,
GetIdentity().meshnetReference.GetLocalPlayerID(),
GetIdentity().GetOwnerID(),
GetIdentity().GetObjectID(),
GetIdentity().GetObjectID(),
GetSubcomponentID());
GetIdentity().RoutePacket(p);
}
else
{
//Debug.Log("Delta successful, hash matches");
}
}