Convert generated levels to walls

Add support for converting generated levels to walls, and merge one into
the entity map at the beginning of the game.

There's nothing here that guarantees the character ends up *inside* the
level though (they almost always don't) so that'll have to be slotted
into the level generation process.

1 files changed, 19 insertions, 0 deletions

diff --git a/src/Xanthous/Entities/Arbitrary.hs b/src/Xanthous/Entities/Arbitrary.hs
new file mode 100644
index 000000000000..9153722d9b12
--- /dev/null
+++ b/src/Xanthous/Entities/Arbitrary.hs
@@ -0,0 +1,19 @@
+{-# OPTIONS_GHC -fno-warn-orphans #-}
+--------------------------------------------------------------------------------
+module Xanthous.Entities.Arbitrary () where
+--------------------------------------------------------------------------------
+import           Xanthous.Prelude
+--------------------------------------------------------------------------------
+import           Test.QuickCheck
+import qualified Test.QuickCheck.Gen as Gen
+--------------------------------------------------------------------------------
+import           Xanthous.Entities (SomeEntity(..))
+import           Xanthous.Entities.Character
+import           Xanthous.Entities.Environment
+--------------------------------------------------------------------------------
+
+instance Arbitrary SomeEntity where
+  arbitrary = Gen.oneof
+    [ pure $ SomeEntity Character
+    , pure $ SomeEntity Wall
+    ]