{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE PolyKinds #-}
{-# LANGUAGE RecordWildCards #-}
module Data.GraphQL.Monad
( module Data.GraphQL.Monad.Class
, GraphQLQueryT
, runGraphQLQueryT
, GraphQLSettings(..)
, defaultGraphQLSettings
) where
import Control.Monad.IO.Class (MonadIO(..))
import Control.Monad.IO.Unlift (MonadUnliftIO(..))
import Control.Monad.Reader (MonadReader, ReaderT, ask, runReaderT)
import Control.Monad.Trans.Class (MonadTrans)
import Data.Aeson ((.=))
import qualified Data.Aeson as Aeson
import Network.HTTP.Client
( Manager
, ManagerSettings
, Request(..)
, RequestBody(..)
, httpLbs
, newManager
, parseUrlThrow
, responseBody
)
import Network.HTTP.Client.TLS (tlsManagerSettings)
import Network.HTTP.Types (hContentType)
import Data.GraphQL.Monad.Class
import Data.GraphQL.Query (GraphQLQuery(..))
data QueryState = QueryState
{ QueryState -> Manager
manager :: Manager
, QueryState -> Request
baseReq :: Request
}
newtype GraphQLQueryT m a = GraphQLQueryT { GraphQLQueryT m a -> ReaderT QueryState m a
unGraphQLQueryT :: ReaderT QueryState m a }
deriving
( a -> GraphQLQueryT m b -> GraphQLQueryT m a
(a -> b) -> GraphQLQueryT m a -> GraphQLQueryT m b
(forall a b. (a -> b) -> GraphQLQueryT m a -> GraphQLQueryT m b)
-> (forall a b. a -> GraphQLQueryT m b -> GraphQLQueryT m a)
-> Functor (GraphQLQueryT m)
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forall (t :: (* -> *) -> * -> *).
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lift :: m a -> GraphQLQueryT m a
$clift :: forall (m :: * -> *) a. Monad m => m a -> GraphQLQueryT m a
MonadTrans
)
instance MonadUnliftIO m => MonadUnliftIO (GraphQLQueryT m) where
withRunInIO :: ((forall a. GraphQLQueryT m a -> IO a) -> IO b)
-> GraphQLQueryT m b
withRunInIO (forall a. GraphQLQueryT m a -> IO a) -> IO b
inner = ReaderT QueryState m b -> GraphQLQueryT m b
forall (m :: * -> *) a. ReaderT QueryState m a -> GraphQLQueryT m a
GraphQLQueryT (ReaderT QueryState m b -> GraphQLQueryT m b)
-> ReaderT QueryState m b -> GraphQLQueryT m b
forall a b. (a -> b) -> a -> b
$ ((forall a. ReaderT QueryState m a -> IO a) -> IO b)
-> ReaderT QueryState m b
forall (m :: * -> *) b.
MonadUnliftIO m =>
((forall a. m a -> IO a) -> IO b) -> m b
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-> ReaderT QueryState m b)
-> ((forall a. ReaderT QueryState m a -> IO a) -> IO b)
-> ReaderT QueryState m b
forall a b. (a -> b) -> a -> b
$ \forall a. ReaderT QueryState m a -> IO a
run -> (forall a. GraphQLQueryT m a -> IO a) -> IO b
inner (ReaderT QueryState m a -> IO a
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run (ReaderT QueryState m a -> IO a)
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-> IO a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. GraphQLQueryT m a -> ReaderT QueryState m a
forall (m :: * -> *) a. GraphQLQueryT m a -> ReaderT QueryState m a
unGraphQLQueryT)
instance MonadIO m => MonadGraphQLQuery (GraphQLQueryT m) where
runQuerySafe :: query -> GraphQLQueryT m (GraphQLResult (Object schema))
runQuerySafe query
query = do
QueryState{Request
Manager
baseReq :: Request
manager :: Manager
baseReq :: QueryState -> Request
manager :: QueryState -> Manager
..} <- GraphQLQueryT m QueryState
forall r (m :: * -> *). MonadReader r m => m r
ask
let request :: Request
request = Request
baseReq
{ requestBody :: RequestBody
requestBody = ByteString -> RequestBody
RequestBodyLBS (ByteString -> RequestBody) -> ByteString -> RequestBody
forall a b. (a -> b) -> a -> b
$ Value -> ByteString
forall a. ToJSON a => a -> ByteString
Aeson.encode (Value -> ByteString) -> Value -> ByteString
forall a b. (a -> b) -> a -> b
$ [Pair] -> Value
Aeson.object
[ Text
"query" Text -> Text -> Pair
forall kv v. (KeyValue kv, ToJSON v) => Text -> v -> kv
.= query -> Text
forall query. GraphQLQuery query => query -> Text
getQueryText query
query
, Text
"variables" Text -> Value -> Pair
forall kv v. (KeyValue kv, ToJSON v) => Text -> v -> kv
.= query -> Value
forall query. GraphQLQuery query => query -> Value
getArgs query
query
]
}
IO (GraphQLResult (Object schema))
-> GraphQLQueryT m (GraphQLResult (Object schema))
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO (GraphQLResult (Object schema))
-> GraphQLQueryT m (GraphQLResult (Object schema)))
-> IO (GraphQLResult (Object schema))
-> GraphQLQueryT m (GraphQLResult (Object schema))
forall a b. (a -> b) -> a -> b
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-> (GraphQLResult (Object schema)
-> IO (GraphQLResult (Object schema)))
-> Either String (GraphQLResult (Object schema))
-> IO (GraphQLResult (Object schema))
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either String -> IO (GraphQLResult (Object schema))
forall (m :: * -> *) a. MonadFail m => String -> m a
fail GraphQLResult (Object schema) -> IO (GraphQLResult (Object schema))
forall (m :: * -> *) a. Monad m => a -> m a
return (Either String (GraphQLResult (Object schema))
-> IO (GraphQLResult (Object schema)))
-> (Response ByteString
-> Either String (GraphQLResult (Object schema)))
-> Response ByteString
-> IO (GraphQLResult (Object schema))
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ByteString -> Either String (GraphQLResult (Object schema))
forall a. FromJSON a => ByteString -> Either String a
Aeson.eitherDecode (ByteString -> Either String (GraphQLResult (Object schema)))
-> (Response ByteString -> ByteString)
-> Response ByteString
-> Either String (GraphQLResult (Object schema))
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Response ByteString -> ByteString
forall body. Response body -> body
responseBody (Response ByteString -> IO (GraphQLResult (Object schema)))
-> IO (Response ByteString) -> IO (GraphQLResult (Object schema))
forall (m :: * -> *) a b. Monad m => (a -> m b) -> m a -> m b
=<< Request -> Manager -> IO (Response ByteString)
httpLbs Request
request Manager
manager
runGraphQLQueryT :: MonadIO m => GraphQLSettings -> GraphQLQueryT m a -> m a
runGraphQLQueryT :: GraphQLSettings -> GraphQLQueryT m a -> m a
runGraphQLQueryT GraphQLSettings{String
ManagerSettings
Request -> Request
modifyReq :: GraphQLSettings -> Request -> Request
url :: GraphQLSettings -> String
managerSettings :: GraphQLSettings -> ManagerSettings
modifyReq :: Request -> Request
url :: String
managerSettings :: ManagerSettings
..} GraphQLQueryT m a
m = do
QueryState
state <- IO QueryState -> m QueryState
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO QueryState -> m QueryState) -> IO QueryState -> m QueryState
forall a b. (a -> b) -> a -> b
$ do
Manager
manager <- ManagerSettings -> IO Manager
newManager ManagerSettings
managerSettings
Request
baseReq <- Request -> Request
modifyReq (Request -> Request) -> (Request -> Request) -> Request -> Request
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Request -> Request
modifyReq' (Request -> Request) -> IO Request -> IO Request
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> String -> IO Request
forall (m :: * -> *). MonadThrow m => String -> m Request
parseUrlThrow String
url
QueryState -> IO QueryState
forall (m :: * -> *) a. Monad m => a -> m a
return QueryState :: Manager -> Request -> QueryState
QueryState{Request
Manager
baseReq :: Request
manager :: Manager
baseReq :: Request
manager :: Manager
..}
(ReaderT QueryState m a -> QueryState -> m a
forall r (m :: * -> *) a. ReaderT r m a -> r -> m a
`runReaderT` QueryState
state)
(ReaderT QueryState m a -> m a)
-> (GraphQLQueryT m a -> ReaderT QueryState m a)
-> GraphQLQueryT m a
-> m a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. GraphQLQueryT m a -> ReaderT QueryState m a
forall (m :: * -> *) a. GraphQLQueryT m a -> ReaderT QueryState m a
unGraphQLQueryT
(GraphQLQueryT m a -> m a) -> GraphQLQueryT m a -> m a
forall a b. (a -> b) -> a -> b
$ GraphQLQueryT m a
m
where
modifyReq' :: Request -> Request
modifyReq' Request
req = Request
req
{ method :: Method
method = Method
"POST"
, requestHeaders :: RequestHeaders
requestHeaders = (HeaderName
hContentType, Method
"application/json") (HeaderName, Method) -> RequestHeaders -> RequestHeaders
forall a. a -> [a] -> [a]
: Request -> RequestHeaders
requestHeaders Request
req
}
data GraphQLSettings = GraphQLSettings
{ GraphQLSettings -> ManagerSettings
managerSettings :: ManagerSettings
, GraphQLSettings -> String
url :: String
, GraphQLSettings -> Request -> Request
modifyReq :: Request -> Request
}
defaultGraphQLSettings :: GraphQLSettings
defaultGraphQLSettings :: GraphQLSettings
defaultGraphQLSettings = GraphQLSettings :: ManagerSettings
-> String -> (Request -> Request) -> GraphQLSettings
GraphQLSettings
{ managerSettings :: ManagerSettings
managerSettings = ManagerSettings
tlsManagerSettings
, url :: String
url = String -> String
forall a. HasCallStack => String -> a
error String
"No URL is provided"
, modifyReq :: Request -> Request
modifyReq = Request -> Request
forall a. a -> a
id
}