public static ItemActivationResult Activate(ItemType type, Atom<World> world)
{
var result = (ItemActivationResult?)null;
switch (type)
{
case ItemType.MiningDroid:
world.Set(w =>
{
var playerShip = w.GetWob<Ship>(w.GetPlayerShipID(Globals.PlayerID));
var planet = w.Wobs.Values.OfType<Planet>()
.FirstOrDefault(p => IsCloseAhead(playerShip.Pose, p.Pos));
result = planet == null ? ItemActivationResult.Nothing : ItemActivationResult.IsDepleted;
if (planet == null) return w;
var droidInventoryID = Guid.NewGuid();
return w
.SetWob(new Inventory(droidInventoryID))
.SetWob(new Droid(Guid.NewGuid(), playerShip.Pose, droidInventoryID));
});
break;
default: throw new NotImplementedException("Activate for " + type);
}
Debug.Assert(result.HasValue, "Bug: Forgot to set activation result for " + type);
return result.Value;
}