{-# 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.GetRule
-- 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)
--
-- Returns the < Rule> that is specified by the 'RuleId' that you included
-- in the 'GetRule' request.
module Network.AWS.WAF.GetRule
    (
    -- * Creating a Request
      getRule
    , GetRule
    -- * Request Lenses
    , grRuleId

    -- * Destructuring the Response
    , getRuleResponse
    , GetRuleResponse
    -- * Response Lenses
    , grrsRule
    , grrsResponseStatus
    ) 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:/ 'getRule' smart constructor.
newtype GetRule = GetRule'
    { _grRuleId :: Text
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'GetRule' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'grRuleId'
getRule
    :: Text -- ^ 'grRuleId'
    -> GetRule
getRule pRuleId_ =
    GetRule'
    { _grRuleId = pRuleId_
    }

-- | The 'RuleId' of the < Rule> that you want to get. 'RuleId' is returned
-- by < CreateRule> and by < ListRules>.
grRuleId :: Lens' GetRule Text
grRuleId = lens _grRuleId (\ s a -> s{_grRuleId = a});

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

instance Hashable GetRule

instance NFData GetRule

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

instance ToJSON GetRule where
        toJSON GetRule'{..}
          = object (catMaybes [Just ("RuleId" .= _grRuleId)])

instance ToPath GetRule where
        toPath = const "/"

instance ToQuery GetRule where
        toQuery = const mempty

-- | /See:/ 'getRuleResponse' smart constructor.
data GetRuleResponse = GetRuleResponse'
    { _grrsRule           :: !(Maybe Rule)
    , _grrsResponseStatus :: !Int
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'GetRuleResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'grrsRule'
--
-- * 'grrsResponseStatus'
getRuleResponse
    :: Int -- ^ 'grrsResponseStatus'
    -> GetRuleResponse
getRuleResponse pResponseStatus_ =
    GetRuleResponse'
    { _grrsRule = Nothing
    , _grrsResponseStatus = pResponseStatus_
    }

-- | Information about the < Rule> that you specified in the 'GetRule'
-- request. For more information, see the following topics:
--
-- -   < Rule>: Contains 'MetricName', 'Name', an array of 'Predicate'
--     objects, and 'RuleId'
-- -   < Predicate>: Each 'Predicate' object contains 'DataId', 'Negated',
--     and 'Type'
grrsRule :: Lens' GetRuleResponse (Maybe Rule)
grrsRule = lens _grrsRule (\ s a -> s{_grrsRule = a});

-- | The response status code.
grrsResponseStatus :: Lens' GetRuleResponse Int
grrsResponseStatus = lens _grrsResponseStatus (\ s a -> s{_grrsResponseStatus = a});

instance NFData GetRuleResponse