Add file

src/Dodge/Item/Location.hs

@@ -0,0 +1,23 @@
+module Dodge.Item.Location where
+import Dodge.Data
+import qualified IntMapHelp as IM
+
+import Control.Lens
+import Data.Maybe
+
+setHeldItemPos :: Creature -> World -> World
+setHeldItemPos cr = fst . getHeldItemPos cr
+
+getHeldItemPos :: Creature -> World -> (World,Int)
+getHeldItemPos cr w = case maybeitid of
+    Nothing -> 
+        ( w & creatures . ix cid . crInv . ix j . itID ?~ newitid
+            & itemPositions %~ IM.insert newitid (InInv cid j)
+        , itid)
+    _ -> (w, itid)
+  where
+    cid = _crID cr
+    j = _crInvSel cr
+    newitid = IM.newKey $ _itemPositions w
+    maybeitid = cr ^? crInv . ix j . itID . _Just
+    itid = fromMaybe newitid maybeitid