module Gargantext.Utils where import Prelude import Data.Lens (Lens', lens) import Data.Newtype (class Newtype, unwrap, wrap) import Data.Set as Set import Data.Set (Set) -- | Astonishingly, not in the prelude id :: forall a. a -> a id a = a setterv :: forall nt record field. Newtype nt record => (record -> field -> record) -> field -> nt -> nt setterv fn v t = (setter (flip fn v) t) setter :: forall nt record. Newtype nt record => (record -> record) -> nt -> nt setter fn = wrap <<< fn <<< unwrap getter :: forall record field nt. Newtype nt record => (record -> field) -> nt -> field getter fn = fn <<< unwrap -- TODO: not optimal but Data.Set lacks some function (Set.alter) toggleSet :: forall a. Ord a => a -> Set a -> Set a toggleSet a s | Set.member a s = Set.delete a s | otherwise = Set.insert a s -- Default sort order is ascending, we may want descending invertOrdering :: Ordering -> Ordering invertOrdering LT = GT invertOrdering GT = LT invertOrdering EQ = EQ -- A lens that always returns unit _unit :: forall s. Lens' s Unit _unit = lens (\_ -> unit) (\s _ -> s)