{-# 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.RDS.DownloadDBLogFilePortion
-- 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)
--
-- Downloads all or a portion of the specified log file, up to 1 MB in size.
--
--
--
-- This operation returns paginated results.
module Network.AWS.RDS.DownloadDBLogFilePortion
    (
    -- * Creating a Request
      downloadDBLogFilePortion
    , DownloadDBLogFilePortion
    -- * Request Lenses
    , ddlfpNumberOfLines
    , ddlfpMarker
    , ddlfpDBInstanceIdentifier
    , ddlfpLogFileName

    -- * Destructuring the Response
    , downloadDBLogFilePortionResponse
    , DownloadDBLogFilePortionResponse
    -- * Response Lenses
    , ddlfprsLogFileData
    , ddlfprsAdditionalDataPending
    , ddlfprsMarker
    , ddlfprsResponseStatus
    ) where

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

-- |
--
--
--
-- /See:/ 'downloadDBLogFilePortion' smart constructor.
data DownloadDBLogFilePortion = DownloadDBLogFilePortion'
    { _ddlfpNumberOfLines        :: !(Maybe Int)
    , _ddlfpMarker               :: !(Maybe Text)
    , _ddlfpDBInstanceIdentifier :: !Text
    , _ddlfpLogFileName          :: !Text
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DownloadDBLogFilePortion' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'ddlfpNumberOfLines' - The number of lines to download. If the number of lines specified results in a file over 1 MB in size, the file will be truncated at 1 MB in size. If the NumberOfLines parameter is specified, then the block of lines returned can be from the beginning or the end of the log file, depending on the value of the Marker parameter.     * If neither Marker or NumberOfLines are specified, the entire log file is returned up to a maximum of 10000 lines, starting with the most recent log entries first.     * If NumberOfLines is specified and Marker is not specified, then the most recent lines from the end of the log file are returned.     * If Marker is specified as "0", then the specified number of lines from the beginning of the log file are returned.     * You can download the log file in blocks of lines by specifying the size of the block using the NumberOfLines parameter, and by specifying a value of "0" for the Marker parameter in your first request. Include the Marker value returned in the response as the Marker value for the next request, continuing until the AdditionalDataPending response element returns false.
--
-- * 'ddlfpMarker' - The pagination token provided in the previous request or "0". If the Marker parameter is specified the response includes only records beyond the marker until the end of the file or up to NumberOfLines.
--
-- * 'ddlfpDBInstanceIdentifier' - The customer-assigned name of the DB instance that contains the log files you want to list. Constraints:     * Must contain from 1 to 63 alphanumeric characters or hyphens     * First character must be a letter     * Cannot end with a hyphen or contain two consecutive hyphens
--
-- * 'ddlfpLogFileName' - The name of the log file to be downloaded.
downloadDBLogFilePortion
    :: Text -- ^ 'ddlfpDBInstanceIdentifier'
    -> Text -- ^ 'ddlfpLogFileName'
    -> DownloadDBLogFilePortion
downloadDBLogFilePortion pDBInstanceIdentifier_ pLogFileName_ =
    DownloadDBLogFilePortion'
    { _ddlfpNumberOfLines = Nothing
    , _ddlfpMarker = Nothing
    , _ddlfpDBInstanceIdentifier = pDBInstanceIdentifier_
    , _ddlfpLogFileName = pLogFileName_
    }

-- | The number of lines to download. If the number of lines specified results in a file over 1 MB in size, the file will be truncated at 1 MB in size. If the NumberOfLines parameter is specified, then the block of lines returned can be from the beginning or the end of the log file, depending on the value of the Marker parameter.     * If neither Marker or NumberOfLines are specified, the entire log file is returned up to a maximum of 10000 lines, starting with the most recent log entries first.     * If NumberOfLines is specified and Marker is not specified, then the most recent lines from the end of the log file are returned.     * If Marker is specified as "0", then the specified number of lines from the beginning of the log file are returned.     * You can download the log file in blocks of lines by specifying the size of the block using the NumberOfLines parameter, and by specifying a value of "0" for the Marker parameter in your first request. Include the Marker value returned in the response as the Marker value for the next request, continuing until the AdditionalDataPending response element returns false.
ddlfpNumberOfLines :: Lens' DownloadDBLogFilePortion (Maybe Int)
ddlfpNumberOfLines = lens _ddlfpNumberOfLines (\ s a -> s{_ddlfpNumberOfLines = a});

-- | The pagination token provided in the previous request or "0". If the Marker parameter is specified the response includes only records beyond the marker until the end of the file or up to NumberOfLines.
ddlfpMarker :: Lens' DownloadDBLogFilePortion (Maybe Text)
ddlfpMarker = lens _ddlfpMarker (\ s a -> s{_ddlfpMarker = a});

-- | The customer-assigned name of the DB instance that contains the log files you want to list. Constraints:     * Must contain from 1 to 63 alphanumeric characters or hyphens     * First character must be a letter     * Cannot end with a hyphen or contain two consecutive hyphens
ddlfpDBInstanceIdentifier :: Lens' DownloadDBLogFilePortion Text
ddlfpDBInstanceIdentifier = lens _ddlfpDBInstanceIdentifier (\ s a -> s{_ddlfpDBInstanceIdentifier = a});

-- | The name of the log file to be downloaded.
ddlfpLogFileName :: Lens' DownloadDBLogFilePortion Text
ddlfpLogFileName = lens _ddlfpLogFileName (\ s a -> s{_ddlfpLogFileName = a});

instance AWSPager DownloadDBLogFilePortion where
        page rq rs
          | stop (rs ^. ddlfprsAdditionalDataPending) = Nothing
          | isNothing (rs ^. ddlfprsMarker) = Nothing
          | otherwise =
            Just $ rq & ddlfpMarker .~ rs ^. ddlfprsMarker

instance AWSRequest DownloadDBLogFilePortion where
        type Rs DownloadDBLogFilePortion =
             DownloadDBLogFilePortionResponse
        request = postQuery rds
        response
          = receiveXMLWrapper "DownloadDBLogFilePortionResult"
              (\ s h x ->
                 DownloadDBLogFilePortionResponse' <$>
                   (x .@? "LogFileData") <*>
                     (x .@? "AdditionalDataPending")
                     <*> (x .@? "Marker")
                     <*> (pure (fromEnum s)))

instance Hashable DownloadDBLogFilePortion

instance NFData DownloadDBLogFilePortion

instance ToHeaders DownloadDBLogFilePortion where
        toHeaders = const mempty

instance ToPath DownloadDBLogFilePortion where
        toPath = const "/"

instance ToQuery DownloadDBLogFilePortion where
        toQuery DownloadDBLogFilePortion'{..}
          = mconcat
              ["Action" =:
                 ("DownloadDBLogFilePortion" :: ByteString),
               "Version" =: ("2014-10-31" :: ByteString),
               "NumberOfLines" =: _ddlfpNumberOfLines,
               "Marker" =: _ddlfpMarker,
               "DBInstanceIdentifier" =: _ddlfpDBInstanceIdentifier,
               "LogFileName" =: _ddlfpLogFileName]

-- | This data type is used as a response element to 'DownloadDBLogFilePortion' .
--
--
--
-- /See:/ 'downloadDBLogFilePortionResponse' smart constructor.
data DownloadDBLogFilePortionResponse = DownloadDBLogFilePortionResponse'
    { _ddlfprsLogFileData           :: !(Maybe Text)
    , _ddlfprsAdditionalDataPending :: !(Maybe Bool)
    , _ddlfprsMarker                :: !(Maybe Text)
    , _ddlfprsResponseStatus        :: !Int
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DownloadDBLogFilePortionResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'ddlfprsLogFileData' - Entries from the specified log file.
--
-- * 'ddlfprsAdditionalDataPending' - Boolean value that if true, indicates there is more data to be downloaded.
--
-- * 'ddlfprsMarker' - A pagination token that can be used in a subsequent DownloadDBLogFilePortion request.
--
-- * 'ddlfprsResponseStatus' - -- | The response status code.
downloadDBLogFilePortionResponse
    :: Int -- ^ 'ddlfprsResponseStatus'
    -> DownloadDBLogFilePortionResponse
downloadDBLogFilePortionResponse pResponseStatus_ =
    DownloadDBLogFilePortionResponse'
    { _ddlfprsLogFileData = Nothing
    , _ddlfprsAdditionalDataPending = Nothing
    , _ddlfprsMarker = Nothing
    , _ddlfprsResponseStatus = pResponseStatus_
    }

-- | Entries from the specified log file.
ddlfprsLogFileData :: Lens' DownloadDBLogFilePortionResponse (Maybe Text)
ddlfprsLogFileData = lens _ddlfprsLogFileData (\ s a -> s{_ddlfprsLogFileData = a});

-- | Boolean value that if true, indicates there is more data to be downloaded.
ddlfprsAdditionalDataPending :: Lens' DownloadDBLogFilePortionResponse (Maybe Bool)
ddlfprsAdditionalDataPending = lens _ddlfprsAdditionalDataPending (\ s a -> s{_ddlfprsAdditionalDataPending = a});

-- | A pagination token that can be used in a subsequent DownloadDBLogFilePortion request.
ddlfprsMarker :: Lens' DownloadDBLogFilePortionResponse (Maybe Text)
ddlfprsMarker = lens _ddlfprsMarker (\ s a -> s{_ddlfprsMarker = a});

-- | -- | The response status code.
ddlfprsResponseStatus :: Lens' DownloadDBLogFilePortionResponse Int
ddlfprsResponseStatus = lens _ddlfprsResponseStatus (\ s a -> s{_ddlfprsResponseStatus = a});

instance NFData DownloadDBLogFilePortionResponse