{-# 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.IAM.GetGroup
-- 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 a list of IAM users that are in the specified IAM group. You can paginate the results using the 'MaxItems' and 'Marker' parameters.
--
-- This operation returns paginated results.
module Network.AWS.IAM.GetGroup
    (
    -- * Creating a Request
      getGroup
    , GetGroup
    -- * Request Lenses
    , ggMarker
    , ggMaxItems
    , ggGroupName

    -- * Destructuring the Response
    , getGroupResponse
    , GetGroupResponse
    -- * Response Lenses
    , ggrsMarker
    , ggrsIsTruncated
    , ggrsResponseStatus
    , ggrsGroup
    , ggrsUsers
    ) where

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

-- | /See:/ 'getGroup' smart constructor.
data GetGroup = GetGroup'
    { _ggMarker    :: !(Maybe Text)
    , _ggMaxItems  :: !(Maybe Nat)
    , _ggGroupName :: !Text
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'GetGroup' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'ggMarker'
--
-- * 'ggMaxItems'
--
-- * 'ggGroupName'
getGroup
    :: Text -- ^ 'ggGroupName'
    -> GetGroup
getGroup pGroupName_ =
    GetGroup'
    { _ggMarker = Nothing
    , _ggMaxItems = Nothing
    , _ggGroupName = pGroupName_
    }

-- | Use this parameter only when paginating results and only after you receive a response indicating that the results are truncated. Set it to the value of the 'Marker' element in the response that you received to indicate where the next call should start.
ggMarker :: Lens' GetGroup (Maybe Text)
ggMarker = lens _ggMarker (\ s a -> s{_ggMarker = a});

-- | Use this only when paginating results to indicate the maximum number of items you want in the response. If additional items exist beyond the maximum you specify, the 'IsTruncated' response element is 'true'.
--
-- This parameter is optional. If you do not include it, it defaults to 100. Note that IAM might return fewer results, even when there are more results available. In that case, the 'IsTruncated' response element returns 'true' and 'Marker' contains a value to include in the subsequent call that tells the service where to continue from.
ggMaxItems :: Lens' GetGroup (Maybe Natural)
ggMaxItems = lens _ggMaxItems (\ s a -> s{_ggMaxItems = a}) . mapping _Nat;

-- | The name of the group.
--
-- The <http://wikipedia.org/wiki/regex regex pattern> for this parameter is a string of characters consisting of upper and lowercase alphanumeric characters with no spaces. You can also include any of the following characters: =,.\'-
ggGroupName :: Lens' GetGroup Text
ggGroupName = lens _ggGroupName (\ s a -> s{_ggGroupName = a});

instance AWSPager GetGroup where
        page rq rs
          | stop (rs ^. ggrsIsTruncated) = Nothing
          | isNothing (rs ^. ggrsMarker) = Nothing
          | otherwise =
            Just $ rq & ggMarker .~ rs ^. ggrsMarker

instance AWSRequest GetGroup where
        type Rs GetGroup = GetGroupResponse
        request = postQuery iam
        response
          = receiveXMLWrapper "GetGroupResult"
              (\ s h x ->
                 GetGroupResponse' <$>
                   (x .@? "Marker") <*> (x .@? "IsTruncated") <*>
                     (pure (fromEnum s))
                     <*> (x .@ "Group")
                     <*>
                     (x .@? "Users" .!@ mempty >>= parseXMLList "member"))

instance Hashable GetGroup

instance NFData GetGroup

instance ToHeaders GetGroup where
        toHeaders = const mempty

instance ToPath GetGroup where
        toPath = const "/"

instance ToQuery GetGroup where
        toQuery GetGroup'{..}
          = mconcat
              ["Action" =: ("GetGroup" :: ByteString),
               "Version" =: ("2010-05-08" :: ByteString),
               "Marker" =: _ggMarker, "MaxItems" =: _ggMaxItems,
               "GroupName" =: _ggGroupName]

-- | Contains the response to a successful < GetGroup> request.
--
-- /See:/ 'getGroupResponse' smart constructor.
data GetGroupResponse = GetGroupResponse'
    { _ggrsMarker         :: !(Maybe Text)
    , _ggrsIsTruncated    :: !(Maybe Bool)
    , _ggrsResponseStatus :: !Int
    , _ggrsGroup          :: !Group
    , _ggrsUsers          :: ![User]
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'GetGroupResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'ggrsMarker'
--
-- * 'ggrsIsTruncated'
--
-- * 'ggrsResponseStatus'
--
-- * 'ggrsGroup'
--
-- * 'ggrsUsers'
getGroupResponse
    :: Int -- ^ 'ggrsResponseStatus'
    -> Group -- ^ 'ggrsGroup'
    -> GetGroupResponse
getGroupResponse pResponseStatus_ pGroup_ =
    GetGroupResponse'
    { _ggrsMarker = Nothing
    , _ggrsIsTruncated = Nothing
    , _ggrsResponseStatus = pResponseStatus_
    , _ggrsGroup = pGroup_
    , _ggrsUsers = mempty
    }

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

-- | A flag that indicates whether there are more items to return. If your results were truncated, you can make a subsequent pagination request using the 'Marker' request parameter to retrieve more items. Note that IAM might return fewer than the 'MaxItems' number of results even when there are more results available. We recommend that you check 'IsTruncated' after every call to ensure that you receive all of your results.
ggrsIsTruncated :: Lens' GetGroupResponse (Maybe Bool)
ggrsIsTruncated = lens _ggrsIsTruncated (\ s a -> s{_ggrsIsTruncated = a});

-- | The response status code.
ggrsResponseStatus :: Lens' GetGroupResponse Int
ggrsResponseStatus = lens _ggrsResponseStatus (\ s a -> s{_ggrsResponseStatus = a});

-- | A structure that contains details about the group.
ggrsGroup :: Lens' GetGroupResponse Group
ggrsGroup = lens _ggrsGroup (\ s a -> s{_ggrsGroup = a});

-- | A list of users in the group.
ggrsUsers :: Lens' GetGroupResponse [User]
ggrsUsers = lens _ggrsUsers (\ s a -> s{_ggrsUsers = a}) . _Coerce;

instance NFData GetGroupResponse