mirror of
https://github.com/simplex-chat/simplex-chat.git
synced 2024-12-17 17:20:21 +01:00
Evgeny Poberezkin
24 lines
607 B
Haskell
24 lines
607 B
Haskell
module Simplex.Chat.Util where
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import Control.Monad (when)
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import Data.ByteString.Char8 (ByteString)
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import Data.Text (Text)
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import Data.Text.Encoding (decodeUtf8With)
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safeDecodeUtf8 :: ByteString -> Text
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safeDecodeUtf8 = decodeUtf8With onError
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where
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onError _ _ = Just '?'
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ifM :: Monad m => m Bool -> m a -> m a -> m a
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ifM ba t f = ba >>= \b -> if b then t else f
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whenM :: Monad m => m Bool -> m () -> m ()
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whenM ba a = ba >>= (`when` a)
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unlessM :: Monad m => m Bool -> m () -> m ()
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unlessM b = ifM b $ pure ()
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eitherToMaybe :: Either a b -> Maybe b
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eitherToMaybe = either (const Nothing) Just
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