src/Ganeti/MaintD/Utils.hs

{-| Utility functions for the maintenance daemon.

-}

{-

Copyright (C) 2015 Google Inc.
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-}

module Ganeti.MaintD.Utils
  ( annotateOpCode
  , getRepairCommand
  ) where

import Control.Lens.Setter (over)
import qualified Text.JSON as J

import qualified Ganeti.Constants as C
import Ganeti.JQueue (reasonTrailTimestamp)
import Ganeti.JQueue.Objects (Timestamp)
import Ganeti.Objects.Maintenance (Incident(..))
import Ganeti.OpCodes (OpCode, MetaOpCode, wrapOpCode)
import Ganeti.OpCodes.Lens (metaParamsL, opReasonL)

-- | Wrap an `OpCode` into a `MetaOpCode` and adding an indication
-- that the `OpCode` was submitted by the maintenance daemon.
annotateOpCode :: String -> Timestamp -> OpCode -> MetaOpCode
annotateOpCode reason ts =
  over (metaParamsL . opReasonL)
    (++ [(C.opcodeReasonSrcMaintd, reason, reasonTrailTimestamp ts)])
  . wrapOpCode

-- | Get the name of the repair command from a live-repair incident.
getRepairCommand :: Incident -> Maybe String
getRepairCommand incident
  | J.JSObject obj <- incidentOriginal incident,
    Just (J.JSString cmd) <- lookup "command" $ J.fromJSObject obj
      = return $ J.fromJSString cmd
getRepairCommand _ = Nothing