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authorEugen Wissner <belka@caraus.de>2019-07-07 06:31:53 +0200
committerEugen Wissner <belka@caraus.de>2019-07-07 06:31:53 +0200
commit22d4a4e583d8075fc71cddc22566f41fc5a698dc (patch)
tree116b444d7b465aadf8a33a22fdd2a6db6994e7c0 /src/Data/GraphQL/Error.hs
parent1431db7e634e5447375e1c598f4336f499384730 (diff)
downloadgraphql-22d4a4e583d8075fc71cddc22566f41fc5a698dc.tar.gz
Change the main namespace to Language.GraphQL
Diffstat (limited to 'src/Data/GraphQL/Error.hs')
-rw-r--r--src/Data/GraphQL/Error.hs57
1 files changed, 0 insertions, 57 deletions
diff --git a/src/Data/GraphQL/Error.hs b/src/Data/GraphQL/Error.hs
deleted file mode 100644
index 08d1622..0000000
--- a/src/Data/GraphQL/Error.hs
+++ /dev/null
@@ -1,57 +0,0 @@
-{-# LANGUAGE OverloadedStrings #-}
-module Data.GraphQL.Error
- ( parseError
- , CollectErrsT
- , addErr
- , addErrMsg
- , runCollectErrs
- , runAppendErrs
- ) where
-
-import qualified Data.Aeson as Aeson
-import Data.Text (Text, pack)
-import Control.Monad.Trans.Class (lift)
-import Control.Monad.Trans.State ( StateT
- , modify
- , runStateT
- )
-
--- | Wraps a parse error into a list of errors.
-parseError :: Applicative f => String -> f Aeson.Value
-parseError s =
- pure $ Aeson.object [("errors", Aeson.toJSON [makeErrorMsg $ pack s])]
-
--- | A wrapper to pass error messages around.
-type CollectErrsT m = StateT [Aeson.Value] m
-
--- | Adds an error to the list of errors.
-addErr :: Monad m => Aeson.Value -> CollectErrsT m ()
-addErr v = modify (v :)
-
-makeErrorMsg :: Text -> Aeson.Value
-makeErrorMsg s = Aeson.object [("message", Aeson.toJSON s)]
-
--- | Convenience function for just wrapping an error message.
-addErrMsg :: Monad m => Text -> CollectErrsT m ()
-addErrMsg = addErr . makeErrorMsg
-
--- | Appends the given list of errors to the current list of errors.
-appendErrs :: Monad m => [Aeson.Value] -> CollectErrsT m ()
-appendErrs errs = modify (errs ++)
-
--- | Runs the given query computation, but collects the errors into an error
--- list, which is then sent back with the data.
-runCollectErrs :: Monad m => CollectErrsT m Aeson.Value -> m Aeson.Value
-runCollectErrs res = do
- (dat, errs) <- runStateT res []
- if null errs
- then return $ Aeson.object [("data", dat)]
- else return $ Aeson.object [("data", dat), ("errors", Aeson.toJSON $ reverse errs)]
-
--- | Runs the given computation, collecting the errors and appending them
--- to the previous list of errors.
-runAppendErrs :: Monad m => CollectErrsT m a -> CollectErrsT m a
-runAppendErrs f = do
- (v, errs) <- lift $ runStateT f []
- appendErrs errs
- return v