private static void GuaranteedExecuteInfo(
IItemContainer container, ItemChangeInfo info)
{
// make sure we're in range.
if (0 > info.Index || info.Index >= container.Provider.Count)
{
return;
}
// try managed
if (!container.ExecuteChangeInfo(info))
{
// it failed, force it
container.Provider[info.Index] = info.NewItem;
}
}
public static IEntityHandle PlayerDropItem(this IItemContainer container, int itemIndex, [NotNull] IPlayerComponent player)
{
if (player == null)
{
throw new ArgumentNullException(nameof(player));
}
var item = container.GetItem(itemIndex);
if (item == null)
{
return(null);
}
var itemFactory = (IGroundItemFactory)player.Parent.Server.Services.GetService(typeof(IGroundItemFactory));
if (itemFactory == null)
{
return(null);
}
var itemEntityHandle = itemFactory.CreatePlayerDrop(item, player, $"Dropped item {item.Id.Name}x{item.Amount}");
if (itemEntityHandle.IsDead())
{
return(null);
}
var itemEntity = itemEntityHandle.Get();
var itemTransform = itemEntity.GetTransform();
var playerTransform = player.Parent.GetTransform();
itemTransform.SwitchPoE(playerTransform.PoE);
itemTransform.Teleport(playerTransform);
container.ExecuteChangeInfo(ItemChangeInfo.Remove(itemIndex));
return(itemEntityHandle);
}
/// <summary>
/// Executes two ItemChangeInfo's in such a way that change will only occur if the two of them are successful.
/// </summary>
/// <returns>True if both infos were executed succesfully, false otherwise.</returns>
private static bool SafeDoubleInfoExecute(
IItemContainer managerA, ItemChangeInfo infoA,
IItemContainer managerB, ItemChangeInfo infoB)
{
// cache state of A.
var idx = infoA.Index;
var cacheA = new ItemChangeInfo(idx, managerA.Provider[idx], 0);
// execute
if (!managerA.ExecuteChangeInfo(infoA))
{
return(false);
}
if (!managerB.ExecuteChangeInfo(infoB))
{
// A succeeded, B didn't. Revert changes to A.
GuaranteedExecuteInfo(managerA, cacheA);
return(false);
}
return(true);
}