Add items and inventory

Add a new "Item" entity, which pulls from the previously-existent
ItemType raw, and add a "PickUp" command which takes the (currently
*only*) item off the ground and puts it into the inventory.

1 files changed, 34 insertions, 4 deletions

diff --git a/src/Xanthous/Entities/Raws.hs b/src/Xanthous/Entities/Raws.hs
index 4a4cba8c9a..e1bb429a0f 100644
--- a/src/Xanthous/Entities/Raws.hs
+++ b/src/Xanthous/Entities/Raws.hs
@@ -1,17 +1,23 @@
 {-# LANGUAGE TemplateHaskell #-}
-
+--------------------------------------------------------------------------------
 module Xanthous.Entities.Raws
   ( raws
   , raw
+  , RawType(..)
+  , rawsWithType
+  , entityFromRaw
   ) where
-
+--------------------------------------------------------------------------------
 import           Data.FileEmbed
 import qualified Data.Yaml as Yaml
 import           Xanthous.Prelude
 import           System.FilePath.Posix
-
+--------------------------------------------------------------------------------
 import           Xanthous.Entities.RawTypes
-
+import           Xanthous.Entities
+import qualified Xanthous.Entities.Creature as Creature
+import qualified Xanthous.Entities.Item as Item
+--------------------------------------------------------------------------------
 rawRaws :: [(FilePath, ByteString)]
 rawRaws = $(embedDir "src/Xanthous/Entities/Raws")
 
@@ -26,3 +32,27 @@ raws
 
 raw :: Text -> Maybe EntityRaw
 raw n = raws ^. at n
+
+class RawType (a :: Type) where
+  _RawType :: Prism' EntityRaw a
+
+instance RawType CreatureType where
+  _RawType = prism' Creature $ \case
+    Creature c -> Just c
+    _ -> Nothing
+
+instance RawType ItemType where
+  _RawType = prism' Item $ \case
+    Item i -> Just i
+    _ -> Nothing
+
+rawsWithType :: forall a. RawType a => HashMap Text a
+rawsWithType = mapFromList . itoListOf (ifolded . _RawType) $ raws
+
+--------------------------------------------------------------------------------
+
+entityFromRaw :: EntityRaw -> SomeEntity
+entityFromRaw (Creature creatureType)
+  = SomeEntity $ Creature.newWithType creatureType
+entityFromRaw (Item itemType)
+  = SomeEntity $ Item.newWithType itemType