{-# 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.WAF.GetChangeToken
-- 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)
--
-- When you want to create, update, or delete AWS WAF objects, get a change token and include the change token in the create, update, or delete request. Change tokens ensure that your application doesn't submit conflicting requests to AWS WAF.
--
--
-- Each create, update, or delete request must use a unique change token. If your application submits a @GetChangeToken@ request and then submits a second @GetChangeToken@ request before submitting a create, update, or delete request, the second @GetChangeToken@ request returns the same value as the first @GetChangeToken@ request.
--
-- When you use a change token in a create, update, or delete request, the status of the change token changes to @PENDING@ , which indicates that AWS WAF is propagating the change to all AWS WAF servers. Use @GetChangeTokenStatus@ to determine the status of your change token.
--
module Network.AWS.WAF.GetChangeToken
    (
    -- * Creating a Request
      getChangeToken
    , GetChangeToken

    -- * Destructuring the Response
    , getChangeTokenResponse
    , GetChangeTokenResponse
    -- * Response Lenses
    , gctrsChangeToken
    , gctrsResponseStatus
    ) where

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

-- | /See:/ 'getChangeToken' smart constructor.
data GetChangeToken =
  GetChangeToken'
  deriving (Eq, Read, Show, Data, Typeable, Generic)


-- | Creates a value of 'GetChangeToken' with the minimum fields required to make a request.
--
getChangeToken
    :: GetChangeToken
getChangeToken = GetChangeToken'


instance AWSRequest GetChangeToken where
        type Rs GetChangeToken = GetChangeTokenResponse
        request = postJSON waf
        response
          = receiveJSON
              (\ s h x ->
                 GetChangeTokenResponse' <$>
                   (x .?> "ChangeToken") <*> (pure (fromEnum s)))

instance Hashable GetChangeToken where

instance NFData GetChangeToken where

instance ToHeaders GetChangeToken where
        toHeaders
          = const
              (mconcat
                 ["X-Amz-Target" =#
                    ("AWSWAF_20150824.GetChangeToken" :: ByteString),
                  "Content-Type" =#
                    ("application/x-amz-json-1.1" :: ByteString)])

instance ToJSON GetChangeToken where
        toJSON = const (Object mempty)

instance ToPath GetChangeToken where
        toPath = const "/"

instance ToQuery GetChangeToken where
        toQuery = const mempty

-- | /See:/ 'getChangeTokenResponse' smart constructor.
data GetChangeTokenResponse = GetChangeTokenResponse'
  { _gctrsChangeToken    :: !(Maybe Text)
  , _gctrsResponseStatus :: !Int
  } deriving (Eq, Read, Show, Data, Typeable, Generic)


-- | Creates a value of 'GetChangeTokenResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'gctrsChangeToken' - The @ChangeToken@ that you used in the request. Use this value in a @GetChangeTokenStatus@ request to get the current status of the request.
--
-- * 'gctrsResponseStatus' - -- | The response status code.
getChangeTokenResponse
    :: Int -- ^ 'gctrsResponseStatus'
    -> GetChangeTokenResponse
getChangeTokenResponse pResponseStatus_ =
  GetChangeTokenResponse'
    {_gctrsChangeToken = Nothing, _gctrsResponseStatus = pResponseStatus_}


-- | The @ChangeToken@ that you used in the request. Use this value in a @GetChangeTokenStatus@ request to get the current status of the request.
gctrsChangeToken :: Lens' GetChangeTokenResponse (Maybe Text)
gctrsChangeToken = lens _gctrsChangeToken (\ s a -> s{_gctrsChangeToken = a})

-- | -- | The response status code.
gctrsResponseStatus :: Lens' GetChangeTokenResponse Int
gctrsResponseStatus = lens _gctrsResponseStatus (\ s a -> s{_gctrsResponseStatus = a})

instance NFData GetChangeTokenResponse where