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module Events.Eval
( evaluate
) where
import Control.Monad.Fix (MonadFix(mfix))
import Events.Types
import Data.Maybe (catMaybes)
import Control.Lens
evaluate :: MonadFix m => (Maybe Object -> StateT EvalCtx m Bool) -> Eval m () -> m [Object]
evaluate predicate x = catMaybes <$> mfix x'
where
x' = evalStateT (foldNDT predicate (preview objCtx <$> execStateT x def)) . flip (set ctxEvents) def . catMaybes
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