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{-# LANGUAGE TemplateHaskell #-}

{-| Implementation of the Ganeti data collector types.

-}

{-

Copyright (C) 2012 Google Inc.

This program is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful, but

WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software

Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301, USA.

-}

module Ganeti.DataCollectors.Types

  ( DCReport(..)

  , buildReport

  ) where

import Data.Maybe

import Text.JSON

import Ganeti.Constants as C

import Ganeti.THH

import Ganeti.Utils (getCurrentTime)

-- | This is the format of the report produced by each data collector.

$(buildObject "DCReport" "dcReport"

  [ simpleField "name"           [t| String |]

  , simpleField "version"        [t| String |]

  , simpleField "format_version" [t| Int |]

  , simpleField "timestamp"      [t| Integer |]

  , simpleField "data"           [t| JSValue |]

  ])

-- | Utility function for building a report automatically adding the current

-- timestamp (rounded up to seconds).

-- If the version is not specified, it will be set to the value indicating

-- a builtin collector.

buildReport :: String -> Maybe String -> Int -> JSValue -> IO DCReport

buildReport name version format_version jsonData = do

  now <- getCurrentTime

  let timestamp = now * 1000000000 :: Integer

      ver = fromMaybe C.builtinDataCollectorVersion version

  return $ DCReport name ver format_version timestamp jsonData