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Diffstat (limited to 'users/glittershark/xanthous/src/Xanthous/App/Common.hs')
-rw-r--r-- | users/glittershark/xanthous/src/Xanthous/App/Common.hs | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/users/glittershark/xanthous/src/Xanthous/App/Common.hs b/users/glittershark/xanthous/src/Xanthous/App/Common.hs new file mode 100644 index 000000000000..69ba6f0e0596 --- /dev/null +++ b/users/glittershark/xanthous/src/Xanthous/App/Common.hs @@ -0,0 +1,67 @@ +-------------------------------------------------------------------------------- +module Xanthous.App.Common + ( describeEntities + , describeEntitiesAt + , entitiesAtPositionWithType + + -- * Re-exports + , MonadState + , MonadRandom + , EntityMap + , module Xanthous.Game.Lenses + , module Xanthous.Monad + ) where +-------------------------------------------------------------------------------- +import Xanthous.Prelude +-------------------------------------------------------------------------------- +import Data.Aeson (object) +import qualified Data.Aeson as A +import Control.Monad.State (MonadState) +import Control.Monad.Random (MonadRandom) +-------------------------------------------------------------------------------- +import Xanthous.Data (Position, positioned) +import Xanthous.Data.EntityMap (EntityMap) +import qualified Xanthous.Data.EntityMap as EntityMap +import Xanthous.Game +import Xanthous.Game.Lenses +import Xanthous.Game.State +import Xanthous.Monad +import Xanthous.Entities.Character (Character) +import Xanthous.Util.Inflection (toSentence) +-------------------------------------------------------------------------------- + +entitiesAtPositionWithType + :: forall a. (Entity a, Typeable a) + => Position + -> EntityMap SomeEntity + -> [(EntityMap.EntityID, a)] +entitiesAtPositionWithType pos em = + let someEnts = EntityMap.atPositionWithIDs pos em + in flip foldMap someEnts $ \(eid, view positioned -> se) -> + case downcastEntity @a se of + Just e -> [(eid, e)] + Nothing -> [] + +describeEntitiesAt :: (MonadState GameState m, MonadRandom m) => Position -> m () +describeEntitiesAt pos = + use ( entities + . EntityMap.atPosition pos + . to (filter (not . entityIs @Character)) + ) >>= \case + Empty -> pure () + ents -> describeEntities ents + +describeEntities + :: ( Entity entity + , MonadRandom m + , MonadState GameState m + , MonoFoldable (f Text) + , Functor f + , Element (f Text) ~ Text + ) + => f entity + -> m () +describeEntities ents = + let descriptions = description <$> ents + in say ["entities", "description"] + $ object ["entityDescriptions" A..= toSentence descriptions] |