{-# LANGUAGE TemplateHaskell #-}
module Calamity.Commands.ParsePrefix
( ParsePrefix(..)
, parsePrefix
, useConstantPrefix ) where
import Calamity.Types.Model.Channel.Message
import Control.Lens
import qualified Data.Text.Lazy as L
import qualified Polysemy as P
data ParsePrefix m a where
ParsePrefix :: Message -> ParsePrefix m (Maybe (L.Text, L.Text))
P.makeSem ''ParsePrefix
useConstantPrefix :: L.Text -> P.Sem (ParsePrefix ': r) a -> P.Sem r a
useConstantPrefix :: Text -> Sem (ParsePrefix : r) a -> Sem r a
useConstantPrefix pre :: Text
pre = (forall x (m :: * -> *). ParsePrefix m x -> Sem r x)
-> Sem (ParsePrefix : r) a -> Sem r a
forall (e :: (* -> *) -> * -> *) (r :: [(* -> *) -> * -> *]) a.
FirstOrder e "interpret" =>
(forall x (m :: * -> *). e m x -> Sem r x)
-> Sem (e : r) a -> Sem r a
P.interpret (\case
ParsePrefix m -> Maybe (Text, Text) -> Sem r (Maybe (Text, Text))
forall (f :: * -> *) a. Applicative f => a -> f a
pure ((Text
pre, ) (Text -> (Text, Text)) -> Maybe Text -> Maybe (Text, Text)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> Text -> Text -> Maybe Text
L.stripPrefix Text
pre (Message
m Message -> Getting Text Message Text -> Text
forall s a. s -> Getting a s a -> a
^. IsLabel "content" (Getting Text Message Text)
Getting Text Message Text
#content)))