feat(xanthous): Add a method to get the name for a type of entity r/2660

I didn't end up using this directly for the thing I was doing, but it
still seems generally useful enough that I'm keeping it around for now

Change-Id: I05c8902d75845f2230ec2373a9677d61cfaafafd
Reviewed-on: https://cl.tvl.fyi/c/depot/+/3206
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI

4 files changed, 35 insertions, 1 deletions

diff --git a/users/grfn/xanthous/src/Xanthous/Game/State.hs b/users/grfn/xanthous/src/Xanthous/Game/State.hs
index cdaf23edcd48..6f51683d14fe 100644
--- a/users/grfn/xanthous/src/Xanthous/Game/State.hs
+++ b/users/grfn/xanthous/src/Xanthous/Game/State.hs
@@ -56,6 +56,8 @@ module Xanthous.Game.State
   , downcastEntity
   , _SomeEntity
   , entityIs
+  , entityTypeName
+
     -- ** Vias
   , Color(..)
   , DrawNothing(..)
@@ -394,6 +396,10 @@ entityIs = isJust . downcastEntity @a
 _SomeEntity :: forall a. (Entity a, Typeable a) => Prism' SomeEntity a
 _SomeEntity = prism' SomeEntity downcastEntity
 
+-- | Get the name of the type of 'SomeEntity' as a string
+entityTypeName :: SomeEntity -> Text
+entityTypeName (SomeEntity e) = pack . tyConName . typeRepTyCon $ typeOf e
+
 newtype DeriveEntity
   (blocksVision :: Bool)
   (description :: Symbol)
diff --git a/users/grfn/xanthous/test/Spec.hs b/users/grfn/xanthous/test/Spec.hs
index e71434863902..46e82c8c6c6b 100644
--- a/users/grfn/xanthous/test/Spec.hs
+++ b/users/grfn/xanthous/test/Spec.hs
@@ -11,6 +11,7 @@ import qualified Xanthous.Data.NestedMapSpec
 import qualified Xanthous.DataSpec
 import qualified Xanthous.Entities.RawsSpec
 import qualified Xanthous.GameSpec
+import qualified Xanthous.Game.StateSpec
 import qualified Xanthous.Generators.Level.UtilSpec
 import qualified Xanthous.MessageSpec
 import qualified Xanthous.Messages.TemplateSpec
@@ -36,6 +37,7 @@ test = testGroup "Xanthous"
   , Xanthous.DataSpec.test
   , Xanthous.Entities.RawsSpec.test
   , Xanthous.GameSpec.test
+  , Xanthous.Game.StateSpec.test
   , Xanthous.Generators.Level.UtilSpec.test
   , Xanthous.MessageSpec.test
   , Xanthous.Messages.TemplateSpec.test
diff --git a/users/grfn/xanthous/test/Xanthous/Game/StateSpec.hs b/users/grfn/xanthous/test/Xanthous/Game/StateSpec.hs
new file mode 100644
index 000000000000..3267d8ef9e9c
--- /dev/null
+++ b/users/grfn/xanthous/test/Xanthous/Game/StateSpec.hs
@@ -0,0 +1,25 @@
+--------------------------------------------------------------------------------
+module Xanthous.Game.StateSpec (main, test) where
+--------------------------------------------------------------------------------
+import           Test.Prelude
+--------------------------------------------------------------------------------
+import           Xanthous.Game.State
+import           Xanthous.Entities.Raws (raws, entityFromRaw)
+--------------------------------------------------------------------------------
+
+main :: IO ()
+main = defaultMain test
+
+test :: TestTree
+test = testGroup "Xanthous.Game.StateSpec"
+  [ testGroup "entityTypeName"
+    [ testCase "for a creature" $
+        let gormlakRaw = raws ^?! ix "gormlak"
+            creature = entityFromRaw gormlakRaw
+        in entityTypeName creature @?= "Creature"
+    , testCase "for an item" $
+        let stickRaw = raws ^?! ix "stick"
+            item = entityFromRaw stickRaw
+        in entityTypeName item @?= "Item"
+    ]
+  ]
diff --git a/users/grfn/xanthous/xanthous.cabal b/users/grfn/xanthous/xanthous.cabal
index 3ad667f62bee..3880969d7d39 100644
--- a/users/grfn/xanthous/xanthous.cabal
+++ b/users/grfn/xanthous/xanthous.cabal
@@ -4,7 +4,7 @@ cabal-version: 1.12
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 3887c4e473843f80e65cb0ae8a1def8fc4871de33e9f425a08820e9a8942e99c
+-- hash: 715e0ab333afb8723ffec128cf69c065f6f018e9622d65c45d404e5084852f54
 
 name:           xanthous
 version:        0.1.0.0
@@ -356,6 +356,7 @@ test-suite test
       Xanthous.Data.NestedMapSpec
       Xanthous.DataSpec
       Xanthous.Entities.RawsSpec
+      Xanthous.Game.StateSpec
       Xanthous.GameSpec
       Xanthous.Generators.Level.UtilSpec
       Xanthous.Messages.TemplateSpec