{-# 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.ListKeyPolicies
-- Copyright   : (c) 2013-2015 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)
--
-- Retrieves a list of policies attached to a key.
--
-- /See:/ <http://docs.aws.amazon.com/kms/latest/APIReference/API_ListKeyPolicies.html AWS API Reference> for ListKeyPolicies.
--
-- This operation returns paginated results.
module Network.AWS.KMS.ListKeyPolicies
    (
    -- * Creating a Request
      listKeyPolicies
    , ListKeyPolicies
    -- * Request Lenses
    , lkpMarker
    , lkpLimit
    , lkpKeyId

    -- * Destructuring the Response
    , listKeyPoliciesResponse
    , ListKeyPoliciesResponse
    -- * Response Lenses
    , lkprsPolicyNames
    , lkprsTruncated
    , lkprsNextMarker
    , lkprsResponseStatus
    ) 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:/ 'listKeyPolicies' smart constructor.
data ListKeyPolicies = ListKeyPolicies'
    { _lkpMarker :: !(Maybe Text)
    , _lkpLimit  :: !(Maybe Nat)
    , _lkpKeyId  :: !Text
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'ListKeyPolicies' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'lkpMarker'
--
-- * 'lkpLimit'
--
-- * 'lkpKeyId'
listKeyPolicies
    :: Text -- ^ 'lkpKeyId'
    -> ListKeyPolicies
listKeyPolicies pKeyId_ =
    ListKeyPolicies'
    { _lkpMarker = Nothing
    , _lkpLimit = Nothing
    , _lkpKeyId = pKeyId_
    }

-- | Use this parameter only when paginating results and only in a subsequent
-- request after you\'ve received a response with truncated results. Set it
-- to the value of 'NextMarker' from the response you just received.
lkpMarker :: Lens' ListKeyPolicies (Maybe Text)
lkpMarker = lens _lkpMarker (\ s a -> s{_lkpMarker = 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.
--
-- Currently only 1 policy can be attached to a key.
lkpLimit :: Lens' ListKeyPolicies (Maybe Natural)
lkpLimit = lens _lkpLimit (\ s a -> s{_lkpLimit = a}) . mapping _Nat;

-- | A unique identifier for the customer master key. This value can be a
-- globally unique identifier, a fully specified ARN to either an alias or
-- a key, or an alias name prefixed by \"alias\/\".
--
-- -   Key ARN Example -
--     arn:aws:kms:us-east-1:123456789012:key\/12345678-1234-1234-1234-123456789012
-- -   Alias ARN Example -
--     arn:aws:kms:us-east-1:123456789012:alias\/MyAliasName
-- -   Globally Unique Key ID Example -
--     12345678-1234-1234-1234-123456789012
-- -   Alias Name Example - alias\/MyAliasName
lkpKeyId :: Lens' ListKeyPolicies Text
lkpKeyId = lens _lkpKeyId (\ s a -> s{_lkpKeyId = a});

instance AWSPager ListKeyPolicies where
        page rq rs
          | stop (rs ^. lkprsTruncated) = Nothing
          | isNothing (rs ^. lkprsNextMarker) = Nothing
          | otherwise =
            Just $ rq & lkpMarker .~ rs ^. lkprsNextMarker

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

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

instance ToJSON ListKeyPolicies where
        toJSON ListKeyPolicies'{..}
          = object
              (catMaybes
                 [("Marker" .=) <$> _lkpMarker,
                  ("Limit" .=) <$> _lkpLimit,
                  Just ("KeyId" .= _lkpKeyId)])

instance ToPath ListKeyPolicies where
        toPath = const "/"

instance ToQuery ListKeyPolicies where
        toQuery = const mempty

-- | /See:/ 'listKeyPoliciesResponse' smart constructor.
data ListKeyPoliciesResponse = ListKeyPoliciesResponse'
    { _lkprsPolicyNames    :: !(Maybe [Text])
    , _lkprsTruncated      :: !(Maybe Bool)
    , _lkprsNextMarker     :: !(Maybe Text)
    , _lkprsResponseStatus :: !Int
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'ListKeyPoliciesResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'lkprsPolicyNames'
--
-- * 'lkprsTruncated'
--
-- * 'lkprsNextMarker'
--
-- * 'lkprsResponseStatus'
listKeyPoliciesResponse
    :: Int -- ^ 'lkprsResponseStatus'
    -> ListKeyPoliciesResponse
listKeyPoliciesResponse pResponseStatus_ =
    ListKeyPoliciesResponse'
    { _lkprsPolicyNames = Nothing
    , _lkprsTruncated = Nothing
    , _lkprsNextMarker = Nothing
    , _lkprsResponseStatus = pResponseStatus_
    }

-- | A list of policy names. Currently, there is only one policy and it is
-- named \"Default\".
lkprsPolicyNames :: Lens' ListKeyPoliciesResponse [Text]
lkprsPolicyNames = lens _lkprsPolicyNames (\ s a -> s{_lkprsPolicyNames = a}) . _Default . _Coerce;

-- | 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.
lkprsTruncated :: Lens' ListKeyPoliciesResponse (Maybe Bool)
lkprsTruncated = lens _lkprsTruncated (\ s a -> s{_lkprsTruncated = a});

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

-- | The response status code.
lkprsResponseStatus :: Lens' ListKeyPoliciesResponse Int
lkprsResponseStatus = lens _lkprsResponseStatus (\ s a -> s{_lkprsResponseStatus = a});