Add a very basic, naive auto-move command

Add a very basic, naive auto-move command, which just steps the player
in a direction until they collide with something, regardless of any
surrounding beasties who might want to eat them.

There's a lot of other stuff going on here - in order to get this
working the way I wanted with a slight (I settled on 50ms) delay between
every step in these autocommands while still redrawing in between I had
to do all the extra machinery for custom Brick events with a channel,
and then at the same time adding the bits for actually executing
autocommands in a general fashion (because there will definitely be
more!) hit my threshold for size for App.hs which sent me on a big
journey to break it up into smaller files -- which seems actually like
it was quite successful. Hopefully this will help with compile times
too, though App.hs is still pretty slow (maybe more to do here).

1 files changed, 40 insertions, 0 deletions

diff --git a/src/Xanthous/App/Time.hs b/src/Xanthous/App/Time.hs
new file mode 100644
index 000000000000..b17348f3853e
--- /dev/null
+++ b/src/Xanthous/App/Time.hs
@@ -0,0 +1,40 @@
+--------------------------------------------------------------------------------
+module Xanthous.App.Time
+  ( stepGame
+  , stepGameBy
+  ) where
+--------------------------------------------------------------------------------
+import           Xanthous.Prelude
+--------------------------------------------------------------------------------
+import           System.Exit
+--------------------------------------------------------------------------------
+import           Xanthous.Data (Ticks)
+import           Xanthous.App.Prompt
+import qualified Xanthous.Data.EntityMap as EntityMap
+import           Xanthous.Entities.Character (isDead)
+import           Xanthous.Game.State
+import           Xanthous.Game.Prompt
+import           Xanthous.Game.Lenses
+import           Control.Monad.State (modify)
+--------------------------------------------------------------------------------
+
+
+stepGameBy :: Ticks -> AppM ()
+stepGameBy ticks = do
+  ents <- uses entities EntityMap.toEIDsAndPositioned
+  for_ ents $ \(eid, pEntity) -> do
+    pEntity' <- step ticks pEntity
+    entities . ix eid .= pEntity'
+
+  modify updateCharacterVision
+
+  whenM (uses character isDead)
+    . prompt_ @'Continue ["dead"] Uncancellable
+    . const . lift . liftIO
+    $ exitSuccess
+
+ticksPerTurn :: Ticks
+ticksPerTurn = 100
+
+stepGame :: AppM ()
+stepGame = stepGameBy ticksPerTurn