{-# 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.DMS.DescribeConnections
-- Copyright   : (c) 2013-2018 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay <brendan.g.hay+amazonka@gmail.com>
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Describes the status of the connections that have been made between the replication instance and an endpoint. Connections are created when you test an endpoint.
--
--
--
-- This operation returns paginated results.
module Network.AWS.DMS.DescribeConnections
    (
    -- * Creating a Request
      describeConnections
    , DescribeConnections
    -- * Request Lenses
    , dcFilters
    , dcMarker
    , dcMaxRecords

    -- * Destructuring the Response
    , describeConnectionsResponse
    , DescribeConnectionsResponse
    -- * Response Lenses
    , drsConnections
    , drsMarker
    , drsResponseStatus
    ) where

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

-- |
--
--
--
-- /See:/ 'describeConnections' smart constructor.
data DescribeConnections = DescribeConnections'
  { _dcFilters    :: !(Maybe [Filter])
  , _dcMarker     :: !(Maybe Text)
  , _dcMaxRecords :: !(Maybe Int)
  } deriving (Eq, Read, Show, Data, Typeable, Generic)


-- | Creates a value of 'DescribeConnections' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dcFilters' - The filters applied to the connection. Valid filter names: endpoint-arn | replication-instance-arn
--
-- * 'dcMarker' - An optional pagination token provided by a previous request. If this parameter is specified, the response includes only records beyond the marker, up to the value specified by @MaxRecords@ .
--
-- * 'dcMaxRecords' - The maximum number of records to include in the response. If more records exist than the specified @MaxRecords@ value, a pagination token called a marker is included in the response so that the remaining results can be retrieved.  Default: 100 Constraints: Minimum 20, maximum 100.
describeConnections
    :: DescribeConnections
describeConnections =
  DescribeConnections'
    {_dcFilters = Nothing, _dcMarker = Nothing, _dcMaxRecords = Nothing}


-- | The filters applied to the connection. Valid filter names: endpoint-arn | replication-instance-arn
dcFilters :: Lens' DescribeConnections [Filter]
dcFilters = lens _dcFilters (\ s a -> s{_dcFilters = a}) . _Default . _Coerce

-- | An optional pagination token provided by a previous request. If this parameter is specified, the response includes only records beyond the marker, up to the value specified by @MaxRecords@ .
dcMarker :: Lens' DescribeConnections (Maybe Text)
dcMarker = lens _dcMarker (\ s a -> s{_dcMarker = a})

-- | The maximum number of records to include in the response. If more records exist than the specified @MaxRecords@ value, a pagination token called a marker is included in the response so that the remaining results can be retrieved.  Default: 100 Constraints: Minimum 20, maximum 100.
dcMaxRecords :: Lens' DescribeConnections (Maybe Int)
dcMaxRecords = lens _dcMaxRecords (\ s a -> s{_dcMaxRecords = a})

instance AWSPager DescribeConnections where
        page rq rs
          | stop (rs ^. drsMarker) = Nothing
          | stop (rs ^. drsConnections) = Nothing
          | otherwise = Just $ rq & dcMarker .~ rs ^. drsMarker

instance AWSRequest DescribeConnections where
        type Rs DescribeConnections =
             DescribeConnectionsResponse
        request = postJSON dms
        response
          = receiveJSON
              (\ s h x ->
                 DescribeConnectionsResponse' <$>
                   (x .?> "Connections" .!@ mempty) <*> (x .?> "Marker")
                     <*> (pure (fromEnum s)))

instance Hashable DescribeConnections where

instance NFData DescribeConnections where

instance ToHeaders DescribeConnections where
        toHeaders
          = const
              (mconcat
                 ["X-Amz-Target" =#
                    ("AmazonDMSv20160101.DescribeConnections" ::
                       ByteString),
                  "Content-Type" =#
                    ("application/x-amz-json-1.1" :: ByteString)])

instance ToJSON DescribeConnections where
        toJSON DescribeConnections'{..}
          = object
              (catMaybes
                 [("Filters" .=) <$> _dcFilters,
                  ("Marker" .=) <$> _dcMarker,
                  ("MaxRecords" .=) <$> _dcMaxRecords])

instance ToPath DescribeConnections where
        toPath = const "/"

instance ToQuery DescribeConnections where
        toQuery = const mempty

-- |
--
--
--
-- /See:/ 'describeConnectionsResponse' smart constructor.
data DescribeConnectionsResponse = DescribeConnectionsResponse'
  { _drsConnections    :: !(Maybe [Connection])
  , _drsMarker         :: !(Maybe Text)
  , _drsResponseStatus :: !Int
  } deriving (Eq, Read, Show, Data, Typeable, Generic)


-- | Creates a value of 'DescribeConnectionsResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'drsConnections' - A description of the connections.
--
-- * 'drsMarker' - An optional pagination token provided by a previous request. If this parameter is specified, the response includes only records beyond the marker, up to the value specified by @MaxRecords@ .
--
-- * 'drsResponseStatus' - -- | The response status code.
describeConnectionsResponse
    :: Int -- ^ 'drsResponseStatus'
    -> DescribeConnectionsResponse
describeConnectionsResponse pResponseStatus_ =
  DescribeConnectionsResponse'
    { _drsConnections = Nothing
    , _drsMarker = Nothing
    , _drsResponseStatus = pResponseStatus_
    }


-- | A description of the connections.
drsConnections :: Lens' DescribeConnectionsResponse [Connection]
drsConnections = lens _drsConnections (\ s a -> s{_drsConnections = a}) . _Default . _Coerce

-- | An optional pagination token provided by a previous request. If this parameter is specified, the response includes only records beyond the marker, up to the value specified by @MaxRecords@ .
drsMarker :: Lens' DescribeConnectionsResponse (Maybe Text)
drsMarker = lens _drsMarker (\ s a -> s{_drsMarker = a})

-- | -- | The response status code.
drsResponseStatus :: Lens' DescribeConnectionsResponse Int
drsResponseStatus = lens _drsResponseStatus (\ s a -> s{_drsResponseStatus = a})

instance NFData DescribeConnectionsResponse where