{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE DeriveGeneric      #-}
{-# LANGUAGE OverloadedStrings  #-}
{-# LANGUAGE RecordWildCards    #-}
{-# LANGUAGE TypeFamilies       #-}

{-# OPTIONS_GHC -fno-warn-unused-imports #-}
{-# OPTIONS_GHC -fno-warn-unused-binds   #-}
{-# OPTIONS_GHC -fno-warn-unused-matches #-}

-- Derived from AWS service descriptions, licensed under Apache 2.0.

-- |
-- Module      : Network.AWS.AppSync.ListResolvers
-- Copyright   : (c) 2013-2018 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay <brendan.g.hay+amazonka@gmail.com>
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Lists the resolvers for a given API and type.
--
--
module Network.AWS.AppSync.ListResolvers
    (
    -- * Creating a Request
      listResolvers
    , ListResolvers
    -- * Request Lenses
    , lrNextToken
    , lrMaxResults
    , lrApiId
    , lrTypeName

    -- * Destructuring the Response
    , listResolversResponse
    , ListResolversResponse
    -- * Response Lenses
    , lrrsNextToken
    , lrrsResolvers
    , lrrsResponseStatus
    ) where

import Network.AWS.AppSync.Types
import Network.AWS.AppSync.Types.Product
import Network.AWS.Lens
import Network.AWS.Prelude
import Network.AWS.Request
import Network.AWS.Response

-- | /See:/ 'listResolvers' smart constructor.
data ListResolvers = ListResolvers'
  { _lrNextToken  :: !(Maybe Text)
  , _lrMaxResults :: !(Maybe Nat)
  , _lrApiId      :: !Text
  , _lrTypeName   :: !Text
  } deriving (Eq, Read, Show, Data, Typeable, Generic)


-- | Creates a value of 'ListResolvers' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'lrNextToken' - An identifier that was returned from the previous call to this operation, which can be used to return the next set of items in the list.
--
-- * 'lrMaxResults' - The maximum number of results you want the request to return.
--
-- * 'lrApiId' - The API ID.
--
-- * 'lrTypeName' - The type name.
listResolvers
    :: Text -- ^ 'lrApiId'
    -> Text -- ^ 'lrTypeName'
    -> ListResolvers
listResolvers pApiId_ pTypeName_ =
  ListResolvers'
    { _lrNextToken = Nothing
    , _lrMaxResults = Nothing
    , _lrApiId = pApiId_
    , _lrTypeName = pTypeName_
    }


-- | An identifier that was returned from the previous call to this operation, which can be used to return the next set of items in the list.
lrNextToken :: Lens' ListResolvers (Maybe Text)
lrNextToken = lens _lrNextToken (\ s a -> s{_lrNextToken = a})

-- | The maximum number of results you want the request to return.
lrMaxResults :: Lens' ListResolvers (Maybe Natural)
lrMaxResults = lens _lrMaxResults (\ s a -> s{_lrMaxResults = a}) . mapping _Nat

-- | The API ID.
lrApiId :: Lens' ListResolvers Text
lrApiId = lens _lrApiId (\ s a -> s{_lrApiId = a})

-- | The type name.
lrTypeName :: Lens' ListResolvers Text
lrTypeName = lens _lrTypeName (\ s a -> s{_lrTypeName = a})

instance AWSRequest ListResolvers where
        type Rs ListResolvers = ListResolversResponse
        request = get appSync
        response
          = receiveJSON
              (\ s h x ->
                 ListResolversResponse' <$>
                   (x .?> "nextToken") <*>
                     (x .?> "resolvers" .!@ mempty)
                     <*> (pure (fromEnum s)))

instance Hashable ListResolvers where

instance NFData ListResolvers where

instance ToHeaders ListResolvers where
        toHeaders
          = const
              (mconcat
                 ["Content-Type" =#
                    ("application/x-amz-json-1.1" :: ByteString)])

instance ToPath ListResolvers where
        toPath ListResolvers'{..}
          = mconcat
              ["/v1/apis/", toBS _lrApiId, "/types/",
               toBS _lrTypeName, "/resolvers"]

instance ToQuery ListResolvers where
        toQuery ListResolvers'{..}
          = mconcat
              ["nextToken" =: _lrNextToken,
               "maxResults" =: _lrMaxResults]

-- | /See:/ 'listResolversResponse' smart constructor.
data ListResolversResponse = ListResolversResponse'
  { _lrrsNextToken      :: !(Maybe Text)
  , _lrrsResolvers      :: !(Maybe [Resolver])
  , _lrrsResponseStatus :: !Int
  } deriving (Eq, Read, Show, Data, Typeable, Generic)


-- | Creates a value of 'ListResolversResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'lrrsNextToken' - An identifier to be passed in the next request to this operation to return the next set of items in the list.
--
-- * 'lrrsResolvers' - The @Resolver@ objects.
--
-- * 'lrrsResponseStatus' - -- | The response status code.
listResolversResponse
    :: Int -- ^ 'lrrsResponseStatus'
    -> ListResolversResponse
listResolversResponse pResponseStatus_ =
  ListResolversResponse'
    { _lrrsNextToken = Nothing
    , _lrrsResolvers = Nothing
    , _lrrsResponseStatus = pResponseStatus_
    }


-- | An identifier to be passed in the next request to this operation to return the next set of items in the list.
lrrsNextToken :: Lens' ListResolversResponse (Maybe Text)
lrrsNextToken = lens _lrrsNextToken (\ s a -> s{_lrrsNextToken = a})

-- | The @Resolver@ objects.
lrrsResolvers :: Lens' ListResolversResponse [Resolver]
lrrsResolvers = lens _lrrsResolvers (\ s a -> s{_lrrsResolvers = a}) . _Default . _Coerce

-- | -- | The response status code.
lrrsResponseStatus :: Lens' ListResolversResponse Int
lrrsResponseStatus = lens _lrrsResponseStatus (\ s a -> s{_lrrsResponseStatus = a})

instance NFData ListResolversResponse where