79 lines
3.1 KiB
Haskell
79 lines
3.1 KiB
Haskell
module Utils.Parameters
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( GlobalGetParam(..)
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, lookupGlobalGetParam, hasGlobalGetParam
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, lookupGlobalGetParamForm, hasGlobalGetParamForm
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, globalGetParamField
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, GlobalPostParam(..)
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, lookupGlobalPostParam, hasGlobalPostParam
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, lookupGlobalPostParamForm, hasGlobalPostParamForm
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, globalPostParamField
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) where
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import ClassyPrelude.Yesod
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import Utils.PathPiece
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import qualified Data.Map as Map
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import Data.Universe
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import Control.Monad.Trans.Maybe (MaybeT(..))
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data GlobalGetParam = GetReferer
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deriving (Eq, Ord, Enum, Bounded, Read, Show, Generic)
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instance Universe GlobalGetParam
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instance Finite GlobalGetParam
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nullaryPathPiece ''GlobalGetParam (camelToPathPiece' 1)
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lookupGlobalGetParam :: (MonadHandler m, PathPiece result) => GlobalGetParam -> m (Maybe result)
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lookupGlobalGetParam ident = (>>= fromPathPiece) <$> lookupGetParam (toPathPiece ident)
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hasGlobalGetParam :: MonadHandler m => GlobalGetParam -> m Bool
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hasGlobalGetParam ident = isJust <$> lookupGetParam (toPathPiece ident)
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lookupGlobalGetParamForm :: (Monad m, PathPiece result) => GlobalGetParam -> MForm m (Maybe result)
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lookupGlobalGetParamForm ident = runMaybeT $ do
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ps <- MaybeT askParams
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MaybeT . return $ Map.lookup (toPathPiece ident) ps >>= listToMaybe >>= fromPathPiece
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hasGlobalGetParamForm :: Monad m => GlobalGetParam -> MForm m Bool
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hasGlobalGetParamForm ident = maybe False (Map.member $ toPathPiece ident) <$> askParams
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globalGetParamField :: Monad m => GlobalPostParam -> Field m a -> MForm m (Maybe a)
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globalGetParamField ident Field{fieldParse} = runMaybeT $ do
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ts <- fromMaybe [] . Map.lookup (toPathPiece ident) <$> MaybeT askParams
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fs <- fromMaybe [] . Map.lookup (toPathPiece ident) <$> MaybeT askFiles
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MaybeT $ either (const Nothing) id <$> lift (fieldParse ts fs)
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data GlobalPostParam = PostFormIdentifier
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| PostDeleteTarget
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| PostMassInputShape
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deriving (Eq, Ord, Enum, Bounded, Read, Show, Generic)
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instance Universe GlobalPostParam
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instance Finite GlobalPostParam
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nullaryPathPiece ''GlobalPostParam (camelToPathPiece' 1)
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lookupGlobalPostParam :: (MonadHandler m, PathPiece result) => GlobalPostParam -> m (Maybe result)
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lookupGlobalPostParam ident = (>>= fromPathPiece) <$> lookupPostParam (toPathPiece ident)
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hasGlobalPostParam :: MonadHandler m => GlobalPostParam -> m Bool
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hasGlobalPostParam ident = isJust <$> lookupPostParam (toPathPiece ident)
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lookupGlobalPostParamForm :: (Monad m, PathPiece result) => GlobalPostParam -> MForm m (Maybe result)
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lookupGlobalPostParamForm ident = runMaybeT $ do
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ps <- MaybeT askParams
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MaybeT . return $ Map.lookup (toPathPiece ident) ps >>= listToMaybe >>= fromPathPiece
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hasGlobalPostParamForm :: Monad m => GlobalPostParam -> MForm m Bool
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hasGlobalPostParamForm ident = maybe False (Map.member $ toPathPiece ident) <$> askParams
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globalPostParamField :: Monad m => GlobalPostParam -> Field m a -> MForm m (Maybe a)
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globalPostParamField ident Field{fieldParse} = runMaybeT $ do
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ts <- fromMaybe [] . Map.lookup (toPathPiece ident) <$> MaybeT askParams
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fs <- fromMaybe [] . Map.lookup (toPathPiece ident) <$> MaybeT askFiles
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MaybeT $ either (const Nothing) id <$> lift (fieldParse ts fs)
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