{-# 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.KMS.ListKeys
-- 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)
--
-- Lists the customer master keys.
--
--
--
-- This operation returns paginated results.
module Network.AWS.KMS.ListKeys
    (
    -- * Creating a Request
      listKeys
    , ListKeys
    -- * Request Lenses
    , lkMarker
    , lkLimit

    -- * Destructuring the Response
    , listKeysResponse
    , ListKeysResponse
    -- * Response Lenses
    , lkrsTruncated
    , lkrsKeys
    , lkrsNextMarker
    , lkrsResponseStatus
    ) where

import           Network.AWS.KMS.Types
import           Network.AWS.KMS.Types.Product
import           Network.AWS.Lens
import           Network.AWS.Pager
import           Network.AWS.Prelude
import           Network.AWS.Request
import           Network.AWS.Response

-- | /See:/ 'listKeys' smart constructor.
data ListKeys = ListKeys'
    { _lkMarker :: !(Maybe Text)
    , _lkLimit  :: !(Maybe Nat)
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'ListKeys' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'lkMarker' - Use this parameter only when paginating results and only in a subsequent request after you receive a response with truncated results. Set it to the value of @NextMarker@ from the response you just received.
--
-- * 'lkLimit' - When paginating results, specify the maximum number of items to return in the response. If additional items exist beyond the number you specify, the @Truncated@ element in the response is set to true. This value is optional. If you include a value, it must be between 1 and 1000, inclusive. If you do not include a value, it defaults to 100.
listKeys
    :: ListKeys
listKeys =
    ListKeys'
    { _lkMarker = Nothing
    , _lkLimit = Nothing
    }

-- | Use this parameter only when paginating results and only in a subsequent request after you receive a response with truncated results. Set it to the value of @NextMarker@ from the response you just received.
lkMarker :: Lens' ListKeys (Maybe Text)
lkMarker = lens _lkMarker (\ s a -> s{_lkMarker = a});

-- | When paginating results, specify the maximum number of items to return in the response. If additional items exist beyond the number you specify, the @Truncated@ element in the response is set to true. This value is optional. If you include a value, it must be between 1 and 1000, inclusive. If you do not include a value, it defaults to 100.
lkLimit :: Lens' ListKeys (Maybe Natural)
lkLimit = lens _lkLimit (\ s a -> s{_lkLimit = a}) . mapping _Nat;

instance AWSPager ListKeys where
        page rq rs
          | stop (rs ^. lkrsTruncated) = Nothing
          | isNothing (rs ^. lkrsNextMarker) = Nothing
          | otherwise =
            Just $ rq & lkMarker .~ rs ^. lkrsNextMarker

instance AWSRequest ListKeys where
        type Rs ListKeys = ListKeysResponse
        request = postJSON kms
        response
          = receiveJSON
              (\ s h x ->
                 ListKeysResponse' <$>
                   (x .?> "Truncated") <*> (x .?> "Keys" .!@ mempty) <*>
                     (x .?> "NextMarker")
                     <*> (pure (fromEnum s)))

instance Hashable ListKeys

instance NFData ListKeys

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

instance ToJSON ListKeys where
        toJSON ListKeys'{..}
          = object
              (catMaybes
                 [("Marker" .=) <$> _lkMarker,
                  ("Limit" .=) <$> _lkLimit])

instance ToPath ListKeys where
        toPath = const "/"

instance ToQuery ListKeys where
        toQuery = const mempty

-- | /See:/ 'listKeysResponse' smart constructor.
data ListKeysResponse = ListKeysResponse'
    { _lkrsTruncated      :: !(Maybe Bool)
    , _lkrsKeys           :: !(Maybe [KeyListEntry])
    , _lkrsNextMarker     :: !(Maybe Text)
    , _lkrsResponseStatus :: !Int
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'ListKeysResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'lkrsTruncated' - A flag that indicates whether there are more items in the list. If your results were truncated, you can use the @Marker@ parameter to make a subsequent pagination request to retrieve more items in the list.
--
-- * 'lkrsKeys' - A list of keys.
--
-- * 'lkrsNextMarker' - When @Truncated@ is true, this value is present and contains the value to use for the @Marker@ parameter in a subsequent pagination request.
--
-- * 'lkrsResponseStatus' - -- | The response status code.
listKeysResponse
    :: Int -- ^ 'lkrsResponseStatus'
    -> ListKeysResponse
listKeysResponse pResponseStatus_ =
    ListKeysResponse'
    { _lkrsTruncated = Nothing
    , _lkrsKeys = Nothing
    , _lkrsNextMarker = Nothing
    , _lkrsResponseStatus = pResponseStatus_
    }

-- | A flag that indicates whether there are more items in the list. If your results were truncated, you can use the @Marker@ parameter to make a subsequent pagination request to retrieve more items in the list.
lkrsTruncated :: Lens' ListKeysResponse (Maybe Bool)
lkrsTruncated = lens _lkrsTruncated (\ s a -> s{_lkrsTruncated = a});

-- | A list of keys.
lkrsKeys :: Lens' ListKeysResponse [KeyListEntry]
lkrsKeys = lens _lkrsKeys (\ s a -> s{_lkrsKeys = a}) . _Default . _Coerce;

-- | When @Truncated@ is true, this value is present and contains the value to use for the @Marker@ parameter in a subsequent pagination request.
lkrsNextMarker :: Lens' ListKeysResponse (Maybe Text)
lkrsNextMarker = lens _lkrsNextMarker (\ s a -> s{_lkrsNextMarker = a});

-- | -- | The response status code.
lkrsResponseStatus :: Lens' ListKeysResponse Int
lkrsResponseStatus = lens _lkrsResponseStatus (\ s a -> s{_lkrsResponseStatus = a});

instance NFData ListKeysResponse