{-# 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.EFS.DescribeMountTargets
-- 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)
--
-- Returns the descriptions of all the current mount targets, or a specific
-- mount target, for a file system. When requesting all of the current
-- mount targets, the order of mount targets returned in the response is
-- unspecified.
--
-- This operation requires permission for the
-- 'elasticfilesystem:DescribeMountTargets' action, on either the file
-- system id that you specify in 'FileSystemId', or on the file system of
-- the mount target that you specify in 'MountTargetId'.
--
-- /See:/ <http://docs.aws.amazon.com/directoryservice/latest/devguide/API_DescribeMountTargets.html AWS API Reference> for DescribeMountTargets.
module Network.AWS.EFS.DescribeMountTargets
    (
    -- * Creating a Request
      describeMountTargets
    , DescribeMountTargets
    -- * Request Lenses
    , dmtFileSystemId
    , dmtMarker
    , dmtMaxItems
    , dmtMountTargetId

    -- * Destructuring the Response
    , describeMountTargetsResponse
    , DescribeMountTargetsResponse
    -- * Response Lenses
    , dmtrsMountTargets
    , dmtrsMarker
    , dmtrsNextMarker
    , dmtrsResponseStatus
    ) where

import           Network.AWS.EFS.Types
import           Network.AWS.EFS.Types.Product
import           Network.AWS.Prelude
import           Network.AWS.Request
import           Network.AWS.Response

-- | /See:/ 'describeMountTargets' smart constructor.
data DescribeMountTargets = DescribeMountTargets'
    { _dmtFileSystemId  :: !(Maybe Text)
    , _dmtMarker        :: !(Maybe Text)
    , _dmtMaxItems      :: !(Maybe Nat)
    , _dmtMountTargetId :: !(Maybe Text)
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeMountTargets' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dmtFileSystemId'
--
-- * 'dmtMarker'
--
-- * 'dmtMaxItems'
--
-- * 'dmtMountTargetId'
describeMountTargets
    :: DescribeMountTargets
describeMountTargets =
    DescribeMountTargets'
    { _dmtFileSystemId = Nothing
    , _dmtMarker = Nothing
    , _dmtMaxItems = Nothing
    , _dmtMountTargetId = Nothing
    }

-- | Optional. String. The ID of the file system whose mount targets you want
-- to list. It must be included in your request if 'MountTargetId' is not
-- included.
dmtFileSystemId :: Lens' DescribeMountTargets (Maybe Text)
dmtFileSystemId = lens _dmtFileSystemId (\ s a -> s{_dmtFileSystemId = a});

-- | Optional. String. Opaque pagination token returned from a previous
-- 'DescribeMountTargets' operation. If present, it specifies to continue
-- the list from where the previous returning call left off.
dmtMarker :: Lens' DescribeMountTargets (Maybe Text)
dmtMarker = lens _dmtMarker (\ s a -> s{_dmtMarker = a});

-- | Optional. Maximum number of mount targets to return in the response. It
-- must be an integer with a value greater than zero.
dmtMaxItems :: Lens' DescribeMountTargets (Maybe Natural)
dmtMaxItems = lens _dmtMaxItems (\ s a -> s{_dmtMaxItems = a}) . mapping _Nat;

-- | Optional. String. The ID of the mount target that you want to have
-- described. It must be included in your request if 'FileSystemId' is not
-- included.
dmtMountTargetId :: Lens' DescribeMountTargets (Maybe Text)
dmtMountTargetId = lens _dmtMountTargetId (\ s a -> s{_dmtMountTargetId = a});

instance AWSRequest DescribeMountTargets where
        type Rs DescribeMountTargets =
             DescribeMountTargetsResponse
        request = get eFS
        response
          = receiveJSON
              (\ s h x ->
                 DescribeMountTargetsResponse' <$>
                   (x .?> "MountTargets" .!@ mempty) <*>
                     (x .?> "Marker")
                     <*> (x .?> "NextMarker")
                     <*> (pure (fromEnum s)))

instance ToHeaders DescribeMountTargets where
        toHeaders = const mempty

instance ToPath DescribeMountTargets where
        toPath = const "/2015-02-01/mount-targets"

instance ToQuery DescribeMountTargets where
        toQuery DescribeMountTargets'{..}
          = mconcat
              ["FileSystemId" =: _dmtFileSystemId,
               "Marker" =: _dmtMarker, "MaxItems" =: _dmtMaxItems,
               "MountTargetId" =: _dmtMountTargetId]

-- | /See:/ 'describeMountTargetsResponse' smart constructor.
data DescribeMountTargetsResponse = DescribeMountTargetsResponse'
    { _dmtrsMountTargets   :: !(Maybe [MountTargetDescription])
    , _dmtrsMarker         :: !(Maybe Text)
    , _dmtrsNextMarker     :: !(Maybe Text)
    , _dmtrsResponseStatus :: !Int
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeMountTargetsResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dmtrsMountTargets'
--
-- * 'dmtrsMarker'
--
-- * 'dmtrsNextMarker'
--
-- * 'dmtrsResponseStatus'
describeMountTargetsResponse
    :: Int -- ^ 'dmtrsResponseStatus'
    -> DescribeMountTargetsResponse
describeMountTargetsResponse pResponseStatus_ =
    DescribeMountTargetsResponse'
    { _dmtrsMountTargets = Nothing
    , _dmtrsMarker = Nothing
    , _dmtrsNextMarker = Nothing
    , _dmtrsResponseStatus = pResponseStatus_
    }

-- | Returns the file system\'s mount targets as an array of
-- 'MountTargetDescription' objects.
dmtrsMountTargets :: Lens' DescribeMountTargetsResponse [MountTargetDescription]
dmtrsMountTargets = lens _dmtrsMountTargets (\ s a -> s{_dmtrsMountTargets = a}) . _Default . _Coerce;

-- | If the request included the 'Marker', the response returns that value in
-- this field.
dmtrsMarker :: Lens' DescribeMountTargetsResponse (Maybe Text)
dmtrsMarker = lens _dmtrsMarker (\ s a -> s{_dmtrsMarker = a});

-- | If a value is present, there are more mount targets to return. In a
-- subsequent request, you can provide 'Marker' in your request with this
-- value to retrieve the next set of mount targets.
dmtrsNextMarker :: Lens' DescribeMountTargetsResponse (Maybe Text)
dmtrsNextMarker = lens _dmtrsNextMarker (\ s a -> s{_dmtrsNextMarker = a});

-- | The response status code.
dmtrsResponseStatus :: Lens' DescribeMountTargetsResponse Int
dmtrsResponseStatus = lens _dmtrsResponseStatus (\ s a -> s{_dmtrsResponseStatus = a});