{-# 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) 2013-2016 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay <brendan.g.hay@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

instance NFData GetChangeToken

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'
--
-- * 'gctrsResponseStatus'
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