{-# LANGUAGE CPP #-}
{-# LANGUAGE ConstraintKinds #-}
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DeriveFunctor #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE GADTs #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE NamedFieldPuns #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE PolyKinds #-}
{-# LANGUAGE RankNTypes #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE StandaloneDeriving #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE NoImplicitPrelude #-}

module Data.Morpheus.App.Internal.Resolving.Resolver
  ( Resolver,
    LiftOperation,
    lift,
    subscribe,
    ResponseEvent (..),
    ResponseStream,
    WithOperation,
    ResolverContext (..),
    unsafeInternalContext,
    withArguments,
    getArguments,
    SubscriptionField (..),
    liftResolverState,
    runResolver,
  )
where

import Control.Monad.Trans.Reader (mapReaderT)
import Data.Morpheus.App.Internal.Resolving.Event
  ( EventHandler (..),
    ResponseEvent (..),
  )
import Data.Morpheus.App.Internal.Resolving.ResolverState
  ( ResolverContext (..),
    ResolverState,
    ResolverStateT (..),
    clearStateResolverEvents,
    resolverFailureMessage,
    runResolverState,
    runResolverStateM,
    runResolverStateT,
    toResolverStateT,
  )
import Data.Morpheus.Internal.Ext
  ( Eventless,
    Failure (..),
    PushEvents (..),
    Result (..),
    ResultT (..),
    cleanEvents,
    mapEvent,
  )
import Data.Morpheus.Types.IO
  ( GQLResponse,
    renderResponse,
  )
import Data.Morpheus.Types.Internal.AST
  ( Arguments,
    MUTATION,
    OperationType (..),
    QUERY,
    SUBSCRIPTION,
    Selection (..),
    VALID,
    ValidValue,
    Value (..),
    msg,
  )
import Relude hiding
  ( Show,
    empty,
    show,
  )
import Prelude (Show (..))

type WithOperation (o :: OperationType) = LiftOperation o

type ResponseStream event (m :: * -> *) = ResultT (ResponseEvent event m) m

data SubscriptionField (a :: *) where
  SubscriptionField ::
    { SubscriptionField a
-> forall e (m :: * -> *) v.
   (a ~ Resolver SUBSCRIPTION e m v) =>
   Channel e
channel :: forall e m v. a ~ Resolver SUBSCRIPTION e m v => Channel e,
      SubscriptionField a -> a
unSubscribe :: a
    } ->
    SubscriptionField a

--
-- GraphQL Field Resolver
--
---------------------------------------------------------------
data Resolver (o :: OperationType) event (m :: * -> *) value where
  ResolverQ :: {Resolver QUERY event m value -> ResolverStateT () m value
runResolverQ :: ResolverStateT () m value} -> Resolver QUERY event m value
  ResolverM :: {Resolver MUTATION event m value -> ResolverStateT event m value
runResolverM :: ResolverStateT event m value} -> Resolver MUTATION event m value
  ResolverS :: {Resolver SUBSCRIPTION event m value
-> ResolverStateT () m (SubEventRes event m value)
runResolverS :: ResolverStateT () m (SubEventRes event m value)} -> Resolver SUBSCRIPTION event m value

type SubEventRes event m value = ReaderT event (ResolverStateT () m) value

instance Show (Resolver o e m value) where
  show :: Resolver o e m value -> String
show ResolverQ {} = String
"Resolver QUERY e m a"
  show ResolverM {} = String
"Resolver MUTATION e m a"
  show ResolverS {} = String
"Resolver SUBSCRIPTION e m a"

deriving instance (Functor m) => Functor (Resolver o e m)

-- Applicative
instance (LiftOperation o, Monad m) => Applicative (Resolver o e m) where
  pure :: a -> Resolver o e m a
pure = ResolverStateT e m a -> Resolver o e m a
forall (o :: OperationType) (m :: * -> *) e a.
(LiftOperation o, Monad m) =>
ResolverStateT e m a -> Resolver o e m a
packResolver (ResolverStateT e m a -> Resolver o e m a)
-> (a -> ResolverStateT e m a) -> a -> Resolver o e m a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. a -> ResolverStateT e m a
forall (f :: * -> *) a. Applicative f => a -> f a
pure
  ResolverQ ResolverStateT () m (a -> b)
r1 <*> :: Resolver o e m (a -> b) -> Resolver o e m a -> Resolver o e m b
<*> ResolverQ ResolverStateT () m a
r2 = ResolverStateT () m b -> Resolver QUERY e m b
forall (m :: * -> *) value event.
ResolverStateT () m value -> Resolver QUERY event m value
ResolverQ (ResolverStateT () m b -> Resolver QUERY e m b)
-> ResolverStateT () m b -> Resolver QUERY e m b
forall a b. (a -> b) -> a -> b
$ ResolverStateT () m (a -> b)
r1 ResolverStateT () m (a -> b)
-> ResolverStateT () m a -> ResolverStateT () m b
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> ResolverStateT () m a
r2
  ResolverM ResolverStateT e m (a -> b)
r1 <*> ResolverM ResolverStateT e m a
r2 = ResolverStateT e m b -> Resolver MUTATION e m b
forall event (m :: * -> *) value.
ResolverStateT event m value -> Resolver MUTATION event m value
ResolverM (ResolverStateT e m b -> Resolver MUTATION e m b)
-> ResolverStateT e m b -> Resolver MUTATION e m b
forall a b. (a -> b) -> a -> b
$ ResolverStateT e m (a -> b)
r1 ResolverStateT e m (a -> b)
-> ResolverStateT e m a -> ResolverStateT e m b
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> ResolverStateT e m a
r2
  ResolverS ResolverStateT () m (SubEventRes e m (a -> b))
r1 <*> ResolverS ResolverStateT () m (SubEventRes e m a)
r2 = ResolverStateT () m (SubEventRes e m b)
-> Resolver SUBSCRIPTION e m b
forall (m :: * -> *) event value.
ResolverStateT () m (SubEventRes event m value)
-> Resolver SUBSCRIPTION event m value
ResolverS (ResolverStateT () m (SubEventRes e m b)
 -> Resolver SUBSCRIPTION e m b)
-> ResolverStateT () m (SubEventRes e m b)
-> Resolver SUBSCRIPTION e m b
forall a b. (a -> b) -> a -> b
$ SubEventRes e m (a -> b) -> SubEventRes e m a -> SubEventRes e m b
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
(<*>) (SubEventRes e m (a -> b)
 -> SubEventRes e m a -> SubEventRes e m b)
-> ResolverStateT () m (SubEventRes e m (a -> b))
-> ResolverStateT () m (SubEventRes e m a -> SubEventRes e m b)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> ResolverStateT () m (SubEventRes e m (a -> b))
r1 ResolverStateT () m (SubEventRes e m a -> SubEventRes e m b)
-> ResolverStateT () m (SubEventRes e m a)
-> ResolverStateT () m (SubEventRes e m b)
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> ResolverStateT () m (SubEventRes e m a)
r2

-- Monad
instance (Monad m, LiftOperation o) => Monad (Resolver o e m) where
  return :: a -> Resolver o e m a
return = a -> Resolver o e m a
forall (f :: * -> *) a. Applicative f => a -> f a
pure
  (ResolverQ ResolverStateT () m a
x) >>= :: Resolver o e m a -> (a -> Resolver o e m b) -> Resolver o e m b
>>= a -> Resolver o e m b
m2 = ResolverStateT () m b -> Resolver QUERY e m b
forall (m :: * -> *) value event.
ResolverStateT () m value -> Resolver QUERY event m value
ResolverQ (ResolverStateT () m a
x ResolverStateT () m a
-> (a -> ResolverStateT () m b) -> ResolverStateT () m b
forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
>>= Resolver QUERY e m b -> ResolverStateT () m b
forall event (m :: * -> *) value.
Resolver QUERY event m value -> ResolverStateT () m value
runResolverQ (Resolver QUERY e m b -> ResolverStateT () m b)
-> (a -> Resolver QUERY e m b) -> a -> ResolverStateT () m b
forall b c a. (b -> c) -> (a -> b) -> a -> c
. a -> Resolver o e m b
a -> Resolver QUERY e m b
m2)
  (ResolverM ResolverStateT e m a
x) >>= a -> Resolver o e m b
m2 = ResolverStateT e m b -> Resolver MUTATION e m b
forall event (m :: * -> *) value.
ResolverStateT event m value -> Resolver MUTATION event m value
ResolverM (ResolverStateT e m a
x ResolverStateT e m a
-> (a -> ResolverStateT e m b) -> ResolverStateT e m b
forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
>>= Resolver MUTATION e m b -> ResolverStateT e m b
forall event (m :: * -> *) value.
Resolver MUTATION event m value -> ResolverStateT event m value
runResolverM (Resolver MUTATION e m b -> ResolverStateT e m b)
-> (a -> Resolver MUTATION e m b) -> a -> ResolverStateT e m b
forall b c a. (b -> c) -> (a -> b) -> a -> c
. a -> Resolver o e m b
a -> Resolver MUTATION e m b
m2)
  (ResolverS ResolverStateT () m (SubEventRes e m a)
res) >>= a -> Resolver o e m b
m2 = ResolverStateT () m (SubEventRes e m b)
-> Resolver SUBSCRIPTION e m b
forall (m :: * -> *) event value.
ResolverStateT () m (SubEventRes event m value)
-> Resolver SUBSCRIPTION event m value
ResolverS ((a -> Resolver SUBSCRIPTION e m b)
-> SubEventRes e m a -> SubEventRes e m b
forall (m :: * -> *) t r a.
Monad m =>
(t -> Resolver SUBSCRIPTION r m a)
-> ReaderT r (ResolverStateT () m) t
-> ReaderT r (ResolverStateT () m) a
liftSubResolver a -> Resolver o e m b
a -> Resolver SUBSCRIPTION e m b
m2 (SubEventRes e m a -> SubEventRes e m b)
-> ResolverStateT () m (SubEventRes e m a)
-> ResolverStateT () m (SubEventRes e m b)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> ResolverStateT () m (SubEventRes e m a)
res)

liftSubResolver ::
  (Monad m) =>
  (t -> Resolver SUBSCRIPTION r m a) ->
  ReaderT r (ResolverStateT () m) t ->
  ReaderT r (ResolverStateT () m) a
liftSubResolver :: (t -> Resolver SUBSCRIPTION r m a)
-> ReaderT r (ResolverStateT () m) t
-> ReaderT r (ResolverStateT () m) a
liftSubResolver t -> Resolver SUBSCRIPTION r m a
m2 ReaderT r (ResolverStateT () m) t
readResA = (r -> ResolverStateT () m a) -> ReaderT r (ResolverStateT () m) a
forall r (m :: * -> *) a. (r -> m a) -> ReaderT r m a
ReaderT ((r -> ResolverStateT () m a) -> ReaderT r (ResolverStateT () m) a)
-> (r -> ResolverStateT () m a)
-> ReaderT r (ResolverStateT () m) a
forall a b. (a -> b) -> a -> b
$ \r
e -> do
  t
a <- ReaderT r (ResolverStateT () m) t -> r -> ResolverStateT () m t
forall r (m :: * -> *) a. ReaderT r m a -> r -> m a
runReaderT ReaderT r (ResolverStateT () m) t
readResA r
e
  ReaderT r (ResolverStateT () m) a
readResB <- Resolver SUBSCRIPTION r m a
-> ResolverStateT () m (ReaderT r (ResolverStateT () m) a)
forall event (m :: * -> *) value.
Resolver SUBSCRIPTION event m value
-> ResolverStateT () m (SubEventRes event m value)
runResolverS (t -> Resolver SUBSCRIPTION r m a
m2 t
a)
  ReaderT r (ResolverStateT () m) a -> r -> ResolverStateT () m a
forall r (m :: * -> *) a. ReaderT r m a -> r -> m a
runReaderT ReaderT r (ResolverStateT () m) a
readResB r
e

-- MonadIO
instance (MonadIO m, LiftOperation o) => MonadIO (Resolver o e m) where
  liftIO :: IO a -> Resolver o e m a
liftIO = m a -> Resolver o e m a
forall (t :: (* -> *) -> * -> *) (m :: * -> *) a.
(MonadTrans t, Monad m) =>
m a -> t m a
lift (m a -> Resolver o e m a)
-> (IO a -> m a) -> IO a -> Resolver o e m a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO

-- Monad Transformers
instance (LiftOperation o) => MonadTrans (Resolver o e) where
  lift :: m a -> Resolver o e m a
lift = ResolverStateT e m a -> Resolver o e m a
forall (o :: OperationType) (m :: * -> *) e a.
(LiftOperation o, Monad m) =>
ResolverStateT e m a -> Resolver o e m a
packResolver (ResolverStateT e m a -> Resolver o e m a)
-> (m a -> ResolverStateT e m a) -> m a -> Resolver o e m a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. m a -> ResolverStateT e m a
forall (t :: (* -> *) -> * -> *) (m :: * -> *) a.
(MonadTrans t, Monad m) =>
m a -> t m a
lift

-- Failure
instance (LiftOperation o, Monad m, Failure err (ResolverStateT e m)) => Failure err (Resolver o e m) where
  failure :: err -> Resolver o e m v
failure = ResolverStateT e m v -> Resolver o e m v
forall (o :: OperationType) (m :: * -> *) e a.
(LiftOperation o, Monad m) =>
ResolverStateT e m a -> Resolver o e m a
packResolver (ResolverStateT e m v -> Resolver o e m v)
-> (err -> ResolverStateT e m v) -> err -> Resolver o e m v
forall b c a. (b -> c) -> (a -> b) -> a -> c
. err -> ResolverStateT e m v
forall error (f :: * -> *) v. Failure error f => error -> f v
failure

instance (Monad m, LiftOperation o) => MonadFail (Resolver o e m) where
  fail :: String -> Resolver o e m a
fail = Message -> Resolver o e m a
forall error (f :: * -> *) v. Failure error f => error -> f v
failure (Message -> Resolver o e m a)
-> (String -> Message) -> String -> Resolver o e m a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. String -> Message
forall a. Msg a => a -> Message
msg

-- PushEvents
instance (Monad m) => PushEvents e (Resolver MUTATION e m) where
  pushEvents :: [e] -> Resolver MUTATION e m ()
pushEvents = ResolverStateT e m () -> Resolver MUTATION e m ()
forall (o :: OperationType) (m :: * -> *) e a.
(LiftOperation o, Monad m) =>
ResolverStateT e m a -> Resolver o e m a
packResolver (ResolverStateT e m () -> Resolver MUTATION e m ())
-> ([e] -> ResolverStateT e m ())
-> [e]
-> Resolver MUTATION e m ()
forall b c a. (b -> c) -> (a -> b) -> a -> c
. [e] -> ResolverStateT e m ()
forall e (m :: * -> *). PushEvents e m => [e] -> m ()
pushEvents

instance (Monad m, Semigroup a, LiftOperation o) => Semigroup (Resolver o e m a) where
  Resolver o e m a
x <> :: Resolver o e m a -> Resolver o e m a -> Resolver o e m a
<> Resolver o e m a
y = (a -> a -> a) -> Resolver o e m a -> Resolver o e m (a -> a)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap a -> a -> a
forall a. Semigroup a => a -> a -> a
(<>) Resolver o e m a
x Resolver o e m (a -> a) -> Resolver o e m a -> Resolver o e m a
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> Resolver o e m a
y

instance (LiftOperation o, Monad m) => MonadReader ResolverContext (Resolver o e m) where
  ask :: Resolver o e m ResolverContext
ask = ResolverStateT e m ResolverContext
-> Resolver o e m ResolverContext
forall (o :: OperationType) (m :: * -> *) e a.
(LiftOperation o, Monad m) =>
ResolverStateT e m a -> Resolver o e m a
packResolver ResolverStateT e m ResolverContext
forall r (m :: * -> *). MonadReader r m => m r
ask
  local :: (ResolverContext -> ResolverContext)
-> Resolver o e m a -> Resolver o e m a
local ResolverContext -> ResolverContext
f (ResolverQ ResolverStateT () m a
res) = ResolverStateT () m a -> Resolver QUERY e m a
forall (m :: * -> *) value event.
ResolverStateT () m value -> Resolver QUERY event m value
ResolverQ ((ResolverContext -> ResolverContext)
-> ResolverStateT () m a -> ResolverStateT () m a
forall r (m :: * -> *) a. MonadReader r m => (r -> r) -> m a -> m a
local ResolverContext -> ResolverContext
f ResolverStateT () m a
res)
  local ResolverContext -> ResolverContext
f (ResolverM ResolverStateT e m a
res) = ResolverStateT e m a -> Resolver MUTATION e m a
forall event (m :: * -> *) value.
ResolverStateT event m value -> Resolver MUTATION event m value
ResolverM ((ResolverContext -> ResolverContext)
-> ResolverStateT e m a -> ResolverStateT e m a
forall r (m :: * -> *) a. MonadReader r m => (r -> r) -> m a -> m a
local ResolverContext -> ResolverContext
f ResolverStateT e m a
res)
  local ResolverContext -> ResolverContext
f (ResolverS ResolverStateT () m (SubEventRes e m a)
resM) = ResolverStateT () m (SubEventRes e m a)
-> Resolver SUBSCRIPTION e m a
forall (m :: * -> *) event value.
ResolverStateT () m (SubEventRes event m value)
-> Resolver SUBSCRIPTION event m value
ResolverS (ResolverStateT () m (SubEventRes e m a)
 -> Resolver SUBSCRIPTION e m a)
-> ResolverStateT () m (SubEventRes e m a)
-> Resolver SUBSCRIPTION e m a
forall a b. (a -> b) -> a -> b
$ (ResolverStateT () m a -> ResolverStateT () m a)
-> SubEventRes e m a -> SubEventRes e m a
forall (m :: * -> *) a (n :: * -> *) b r.
(m a -> n b) -> ReaderT r m a -> ReaderT r n b
mapReaderT ((ResolverContext -> ResolverContext)
-> ResolverStateT () m a -> ResolverStateT () m a
forall r (m :: * -> *) a. MonadReader r m => (r -> r) -> m a -> m a
local ResolverContext -> ResolverContext
f) (SubEventRes e m a -> SubEventRes e m a)
-> ResolverStateT () m (SubEventRes e m a)
-> ResolverStateT () m (SubEventRes e m a)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> ResolverStateT () m (SubEventRes e m a)
resM

-- | A function to return the internal 'ResolverContext' within a resolver's monad.
-- Using the 'ResolverContext' itself is unsafe because it expposes internal structures
-- of the AST, but you can use the "Data.Morpheus.Types.SelectionTree" typeclass to manipulate
-- the internal AST with a safe interface.
unsafeInternalContext :: (Monad m, LiftOperation o) => Resolver o e m ResolverContext
unsafeInternalContext :: Resolver o e m ResolverContext
unsafeInternalContext = Resolver o e m ResolverContext
forall r (m :: * -> *). MonadReader r m => m r
ask

liftResolverState :: (LiftOperation o, Monad m) => ResolverState a -> Resolver o e m a
liftResolverState :: ResolverState a -> Resolver o e m a
liftResolverState = ResolverStateT e m a -> Resolver o e m a
forall (o :: OperationType) (m :: * -> *) e a.
(LiftOperation o, Monad m) =>
ResolverStateT e m a -> Resolver o e m a
packResolver (ResolverStateT e m a -> Resolver o e m a)
-> (ResolverState a -> ResolverStateT e m a)
-> ResolverState a
-> Resolver o e m a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ResolverState a -> ResolverStateT e m a
forall (m :: * -> *) a e.
Applicative m =>
ResolverState a -> ResolverStateT e m a
toResolverStateT

class LiftOperation (o :: OperationType) where
  packResolver :: Monad m => ResolverStateT e m a -> Resolver o e m a

instance LiftOperation QUERY where
  packResolver :: ResolverStateT e m a -> Resolver QUERY e m a
packResolver = ResolverStateT () m a -> Resolver QUERY e m a
forall (m :: * -> *) value event.
ResolverStateT () m value -> Resolver QUERY event m value
ResolverQ (ResolverStateT () m a -> Resolver QUERY e m a)
-> (ResolverStateT e m a -> ResolverStateT () m a)
-> ResolverStateT e m a
-> Resolver QUERY e m a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ResolverStateT e m a -> ResolverStateT () m a
forall (m :: * -> *) e a e'.
Functor m =>
ResolverStateT e m a -> ResolverStateT e' m a
clearStateResolverEvents

instance LiftOperation MUTATION where
  packResolver :: ResolverStateT e m a -> Resolver MUTATION e m a
packResolver = ResolverStateT e m a -> Resolver MUTATION e m a
forall event (m :: * -> *) value.
ResolverStateT event m value -> Resolver MUTATION event m value
ResolverM

instance LiftOperation SUBSCRIPTION where
  packResolver :: ResolverStateT e m a -> Resolver SUBSCRIPTION e m a
packResolver = ResolverStateT () m (SubEventRes e m a)
-> Resolver SUBSCRIPTION e m a
forall (m :: * -> *) event value.
ResolverStateT () m (SubEventRes event m value)
-> Resolver SUBSCRIPTION event m value
ResolverS (ResolverStateT () m (SubEventRes e m a)
 -> Resolver SUBSCRIPTION e m a)
-> (ResolverStateT e m a
    -> ResolverStateT () m (SubEventRes e m a))
-> ResolverStateT e m a
-> Resolver SUBSCRIPTION e m a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. SubEventRes e m a -> ResolverStateT () m (SubEventRes e m a)
forall (f :: * -> *) a. Applicative f => a -> f a
pure (SubEventRes e m a -> ResolverStateT () m (SubEventRes e m a))
-> (ResolverStateT e m a -> SubEventRes e m a)
-> ResolverStateT e m a
-> ResolverStateT () m (SubEventRes e m a)
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ResolverStateT () m a -> SubEventRes e m a
forall (t :: (* -> *) -> * -> *) (m :: * -> *) a.
(MonadTrans t, Monad m) =>
m a -> t m a
lift (ResolverStateT () m a -> SubEventRes e m a)
-> (ResolverStateT e m a -> ResolverStateT () m a)
-> ResolverStateT e m a
-> SubEventRes e m a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ResolverStateT e m a -> ResolverStateT () m a
forall (m :: * -> *) e a e'.
Functor m =>
ResolverStateT e m a -> ResolverStateT e' m a
clearStateResolverEvents

subscribe ::
  (Monad m) =>
  Channel e ->
  Resolver QUERY e m (e -> Resolver SUBSCRIPTION e m a) ->
  SubscriptionField (Resolver SUBSCRIPTION e m a)
subscribe :: Channel e
-> Resolver QUERY e m (e -> Resolver SUBSCRIPTION e m a)
-> SubscriptionField (Resolver SUBSCRIPTION e m a)
subscribe Channel e
ch Resolver QUERY e m (e -> Resolver SUBSCRIPTION e m a)
res =
  (forall e (m :: * -> *) v.
 (Resolver SUBSCRIPTION e m a ~ Resolver SUBSCRIPTION e m v) =>
 Channel e)
-> Resolver SUBSCRIPTION e m a
-> SubscriptionField (Resolver SUBSCRIPTION e m a)
forall a.
(forall e (m :: * -> *) v.
 (a ~ Resolver SUBSCRIPTION e m v) =>
 Channel e)
-> a -> SubscriptionField a
SubscriptionField Channel e
forall e (m :: * -> *) v.
(Resolver SUBSCRIPTION e m a ~ Resolver SUBSCRIPTION e m v) =>
Channel e
ch
    (Resolver SUBSCRIPTION e m a
 -> SubscriptionField (Resolver SUBSCRIPTION e m a))
-> Resolver SUBSCRIPTION e m a
-> SubscriptionField (Resolver SUBSCRIPTION e m a)
forall a b. (a -> b) -> a -> b
$ ResolverStateT () m (SubEventRes e m a)
-> Resolver SUBSCRIPTION e m a
forall (m :: * -> *) event value.
ResolverStateT () m (SubEventRes event m value)
-> Resolver SUBSCRIPTION event m value
ResolverS
    (ResolverStateT () m (SubEventRes e m a)
 -> Resolver SUBSCRIPTION e m a)
-> ResolverStateT () m (SubEventRes e m a)
-> Resolver SUBSCRIPTION e m a
forall a b. (a -> b) -> a -> b
$ (e -> Resolver SUBSCRIPTION e m a) -> SubEventRes e m a
forall (m :: * -> *) e a.
Monad m =>
(e -> Resolver SUBSCRIPTION e m a)
-> ReaderT e (ResolverStateT () m) a
fromSub ((e -> Resolver SUBSCRIPTION e m a) -> SubEventRes e m a)
-> ResolverStateT () m (e -> Resolver SUBSCRIPTION e m a)
-> ResolverStateT () m (SubEventRes e m a)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> Resolver QUERY e m (e -> Resolver SUBSCRIPTION e m a)
-> ResolverStateT () m (e -> Resolver SUBSCRIPTION e m a)
forall event (m :: * -> *) value.
Resolver QUERY event m value -> ResolverStateT () m value
runResolverQ Resolver QUERY e m (e -> Resolver SUBSCRIPTION e m a)
res
  where
    fromSub :: Monad m => (e -> Resolver SUBSCRIPTION e m a) -> ReaderT e (ResolverStateT () m) a
    fromSub :: (e -> Resolver SUBSCRIPTION e m a)
-> ReaderT e (ResolverStateT () m) a
fromSub e -> Resolver SUBSCRIPTION e m a
f = ReaderT e (ResolverStateT () m) (ReaderT e (ResolverStateT () m) a)
-> ReaderT e (ResolverStateT () m) a
forall (m :: * -> *) a. Monad m => m (m a) -> m a
join ((e -> ResolverStateT () m (ReaderT e (ResolverStateT () m) a))
-> ReaderT
     e (ResolverStateT () m) (ReaderT e (ResolverStateT () m) a)
forall r (m :: * -> *) a. (r -> m a) -> ReaderT r m a
ReaderT (Resolver SUBSCRIPTION e m a
-> ResolverStateT () m (ReaderT e (ResolverStateT () m) a)
forall event (m :: * -> *) value.
Resolver SUBSCRIPTION event m value
-> ResolverStateT () m (SubEventRes event m value)
runResolverS (Resolver SUBSCRIPTION e m a
 -> ResolverStateT () m (ReaderT e (ResolverStateT () m) a))
-> (e -> Resolver SUBSCRIPTION e m a)
-> e
-> ResolverStateT () m (ReaderT e (ResolverStateT () m) a)
forall b c a. (b -> c) -> (a -> b) -> a -> c
. e -> Resolver SUBSCRIPTION e m a
f))

withArguments ::
  (LiftOperation o, Monad m) =>
  (Arguments VALID -> Resolver o e m a) ->
  Resolver o e m a
withArguments :: (Arguments VALID -> Resolver o e m a) -> Resolver o e m a
withArguments = (Resolver o e m (Arguments VALID)
forall (o :: OperationType) (m :: * -> *) e.
(LiftOperation o, Monad m) =>
Resolver o e m (Arguments VALID)
getArguments Resolver o e m (Arguments VALID)
-> (Arguments VALID -> Resolver o e m a) -> Resolver o e m a
forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
>>=)

getArguments ::
  (LiftOperation o, Monad m) =>
  Resolver o e m (Arguments VALID)
getArguments :: Resolver o e m (Arguments VALID)
getArguments = Selection VALID -> Arguments VALID
forall (s :: Stage). Selection s -> Arguments s
selectionArguments (Selection VALID -> Arguments VALID)
-> (ResolverContext -> Selection VALID)
-> ResolverContext
-> Arguments VALID
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ResolverContext -> Selection VALID
currentSelection (ResolverContext -> Arguments VALID)
-> Resolver o e m ResolverContext
-> Resolver o e m (Arguments VALID)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> Resolver o e m ResolverContext
forall (m :: * -> *) (o :: OperationType) e.
(Monad m, LiftOperation o) =>
Resolver o e m ResolverContext
unsafeInternalContext

runResolver ::
  Monad m =>
  Maybe (Selection VALID -> ResolverState (Channel event)) ->
  Resolver o event m ValidValue ->
  ResolverContext ->
  ResponseStream event m ValidValue
runResolver :: Maybe (Selection VALID -> ResolverState (Channel event))
-> Resolver o event m ValidValue
-> ResolverContext
-> ResponseStream event m ValidValue
runResolver Maybe (Selection VALID -> ResolverState (Channel event))
_ (ResolverQ ResolverStateT () m ValidValue
resT) ResolverContext
sel = ResultT () m ValidValue -> ResponseStream event m ValidValue
forall (m :: * -> *) e a e'.
Functor m =>
ResultT e m a -> ResultT e' m a
cleanEvents (ResultT () m ValidValue -> ResponseStream event m ValidValue)
-> ResultT () m ValidValue -> ResponseStream event m ValidValue
forall a b. (a -> b) -> a -> b
$ ResolverStateT () m ValidValue
-> ResolverContext -> ResultT () m ValidValue
forall e (m :: * -> *) a.
ResolverStateT e m a -> ResolverContext -> ResultT e m a
runResolverStateT ResolverStateT () m ValidValue
resT ResolverContext
sel
runResolver Maybe (Selection VALID -> ResolverState (Channel event))
_ (ResolverM ResolverStateT event m ValidValue
resT) ResolverContext
sel = (event -> ResponseEvent event m)
-> ResultT event m ValidValue -> ResponseStream event m ValidValue
forall (m :: * -> *) e e' value.
Monad m =>
(e -> e') -> ResultT e m value -> ResultT e' m value
mapEvent event -> ResponseEvent event m
forall event (m :: * -> *). event -> ResponseEvent event m
Publish (ResultT event m ValidValue -> ResponseStream event m ValidValue)
-> ResultT event m ValidValue -> ResponseStream event m ValidValue
forall a b. (a -> b) -> a -> b
$ ResolverStateT event m ValidValue
-> ResolverContext -> ResultT event m ValidValue
forall e (m :: * -> *) a.
ResolverStateT e m a -> ResolverContext -> ResultT e m a
runResolverStateT ResolverStateT event m ValidValue
resT ResolverContext
sel
runResolver Maybe (Selection VALID -> ResolverState (Channel event))
toChannel (ResolverS ResolverStateT () m (SubEventRes event m ValidValue)
resT) ResolverContext
ctx = m (Result (ResponseEvent event m) ValidValue)
-> ResponseStream event m ValidValue
forall event (m :: * -> *) a.
m (Result event a) -> ResultT event m a
ResultT (m (Result (ResponseEvent event m) ValidValue)
 -> ResponseStream event m ValidValue)
-> m (Result (ResponseEvent event m) ValidValue)
-> ResponseStream event m ValidValue
forall a b. (a -> b) -> a -> b
$ do
  Result () (SubEventRes event m ValidValue)
readResValue <- ResolverStateT () m (SubEventRes event m ValidValue)
-> ResolverContext
-> m (Result () (SubEventRes event m ValidValue))
forall e (m :: * -> *) a.
ResolverStateT e m a -> ResolverContext -> m (Result e a)
runResolverStateM ResolverStateT () m (SubEventRes event m ValidValue)
resT ResolverContext
ctx
  Result (ResponseEvent event m) ValidValue
-> m (Result (ResponseEvent event m) ValidValue)
forall (f :: * -> *) a. Applicative f => a -> f a
pure (Result (ResponseEvent event m) ValidValue
 -> m (Result (ResponseEvent event m) ValidValue))
-> Result (ResponseEvent event m) ValidValue
-> m (Result (ResponseEvent event m) ValidValue)
forall a b. (a -> b) -> a -> b
$ case Result () (SubEventRes event m ValidValue)
readResValue Result () (SubEventRes event m ValidValue)
-> (SubEventRes event m ValidValue
    -> Result () (ResponseEvent event m))
-> Result () (ResponseEvent event m)
forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
>>= ResolverContext
-> Maybe (Selection VALID -> ResolverState (Channel event))
-> (event -> m GQLResponse)
-> Result () (ResponseEvent event m)
forall e (m :: * -> *).
ResolverContext
-> Maybe (Selection VALID -> ResolverState (Channel e))
-> (e -> m GQLResponse)
-> Eventless (ResponseEvent e m)
subscriptionEvents ResolverContext
ctx Maybe (Selection VALID -> ResolverState (Channel event))
toChannel ((event -> m GQLResponse) -> Result () (ResponseEvent event m))
-> (SubEventRes event m ValidValue -> event -> m GQLResponse)
-> SubEventRes event m ValidValue
-> Result () (ResponseEvent event m)
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ResolverContext
-> SubEventRes event m ValidValue -> event -> m GQLResponse
forall (m :: * -> *) event.
Monad m =>
ResolverContext
-> SubEventRes event m ValidValue -> event -> m GQLResponse
toEventResolver ResolverContext
ctx of
    Failure GQLErrors
x -> GQLErrors -> Result (ResponseEvent event m) ValidValue
forall events a. GQLErrors -> Result events a
Failure GQLErrors
x
    Success {GQLErrors
warnings :: forall events a. Result events a -> GQLErrors
warnings :: GQLErrors
warnings, ResponseEvent event m
result :: forall events a. Result events a -> a
result :: ResponseEvent event m
result} ->
      Success :: forall events a. a -> GQLErrors -> [events] -> Result events a
Success
        { events :: [ResponseEvent event m]
events = [ResponseEvent event m
result],
          GQLErrors
warnings :: GQLErrors
warnings :: GQLErrors
warnings,
          result :: ValidValue
result = ValidValue
forall (stage :: Stage). Value stage
Null
        }

toEventResolver :: Monad m => ResolverContext -> SubEventRes event m ValidValue -> (event -> m GQLResponse)
toEventResolver :: ResolverContext
-> SubEventRes event m ValidValue -> event -> m GQLResponse
toEventResolver ResolverContext
sel (ReaderT event -> ResolverStateT () m ValidValue
subRes) event
event = Result () ValidValue -> GQLResponse
forall e. Result e ValidValue -> GQLResponse
renderResponse (Result () ValidValue -> GQLResponse)
-> m (Result () ValidValue) -> m GQLResponse
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> ResolverStateT () m ValidValue
-> ResolverContext -> m (Result () ValidValue)
forall e (m :: * -> *) a.
ResolverStateT e m a -> ResolverContext -> m (Result e a)
runResolverStateM (event -> ResolverStateT () m ValidValue
subRes event
event) ResolverContext
sel

subscriptionEvents ::
  ResolverContext ->
  Maybe (Selection VALID -> ResolverState (Channel e)) ->
  (e -> m GQLResponse) ->
  Eventless (ResponseEvent e m)
subscriptionEvents :: ResolverContext
-> Maybe (Selection VALID -> ResolverState (Channel e))
-> (e -> m GQLResponse)
-> Eventless (ResponseEvent e m)
subscriptionEvents ctx :: ResolverContext
ctx@ResolverContext {Selection VALID
currentSelection :: Selection VALID
currentSelection :: ResolverContext -> Selection VALID
currentSelection} (Just Selection VALID -> ResolverState (Channel e)
channelGenerator) e -> m GQLResponse
res =
  ResolverState (ResponseEvent e m)
-> ResolverContext -> Eventless (ResponseEvent e m)
forall a. ResolverState a -> ResolverContext -> Eventless a
runResolverState ResolverState (ResponseEvent e m)
handle ResolverContext
ctx
  where
    handle :: ResolverState (ResponseEvent e m)
handle = do
      Channel e
channel <- Selection VALID -> ResolverState (Channel e)
channelGenerator Selection VALID
currentSelection
      ResponseEvent e m -> ResolverState (ResponseEvent e m)
forall (f :: * -> *) a. Applicative f => a -> f a
pure (ResponseEvent e m -> ResolverState (ResponseEvent e m))
-> ResponseEvent e m -> ResolverState (ResponseEvent e m)
forall a b. (a -> b) -> a -> b
$ Channel e -> (e -> m GQLResponse) -> ResponseEvent e m
forall event (m :: * -> *).
Channel event -> (event -> m GQLResponse) -> ResponseEvent event m
Subscribe Channel e
channel e -> m GQLResponse
res
subscriptionEvents ResolverContext
ctx Maybe (Selection VALID -> ResolverState (Channel e))
Nothing e -> m GQLResponse
_ = GQLErrors -> Eventless (ResponseEvent e m)
forall error (f :: * -> *) v. Failure error f => error -> f v
failure [ResolverContext -> Message -> GQLError
resolverFailureMessage ResolverContext
ctx Message
"channel Resolver is not defined"]