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{-# LANGUAGE BangPatterns #-}
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DeriveAnyClass #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE DerivingStrategies #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE TypeApplications #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE TypeOperators #-}
module Server ( loadConfig
, Config(..)
, RemoteRef(..)
, ServerState, registry, jobs, defaultState
, JobStatus(..)
, setJobStatus
, setRegistry
, AdminOverview(..)
) where
import Universum
import CheckDir (DirResult)
import Control.Concurrent (modifyMVar_)
import Data.Aeson (FromJSON, ToJSON (toJSON), eitherDecode,
(.=))
import qualified Data.Aeson as A
import qualified Data.ByteString.Lazy as LB
import qualified Data.Map as M
import Data.UUID (UUID)
import Lens.Micro.TH
import LintConfig (LintConfig')
import Toml (TomlCodec)
import qualified Toml as T
-- | a reference in a remote git repository
data RemoteRef = RemoteRef
{ repourl :: Text
, reporef :: Text
} deriving (Generic, FromJSON, ToJSON, Eq, Ord)
type family ConfigRes (b :: Bool) a where
ConfigRes True a = a
ConfigRes False a = FilePath
-- | the server's configuration
data Config (loaded :: Bool) = Config
{ tmpdir :: FilePath
-- ^ dir to clone git things in
, port :: Int
, verbose :: Bool
-- ^ port to bind to
, entrypoint :: FilePath
, lintconfig :: ConfigRes loaded LintConfig'
} deriving Generic
configCodec :: TomlCodec (Config False)
configCodec = Config
<$> T.string "tmpdir" T..= tmpdir
<*> T.int "port" T..= port
<*> T.bool "verbose" T..= verbose
<*> T.string "entrypoint" T..= entrypoint
<*> T.string "lintconfig" T..= lintconfig
-- | a job status (of a specific uuid)
data JobStatus =
Pending | Linted DirResult | Failed Text
deriving (Generic, ToJSON)
-- | the server's global state
data ServerState = ServerState
{ _jobs :: Map RemoteRef JobStatus
, _registry :: Map UUID RemoteRef
}
makeLenses ''ServerState
defaultState :: ServerState
defaultState = ServerState mempty mempty
newtype AdminOverview =
AdminOverview { unAdminOverview :: ServerState }
instance ToJSON AdminOverview where
toJSON (AdminOverview state) =
toJSON . flip M.mapWithKey (view registry state) $ \uuid ref ->
A.object [ "reference" .= uuid
, "remote" .= ref
, "status" .= M.lookup ref (view jobs state)
]
loadConfig :: FilePath -> IO (Config True)
loadConfig path = do
res <- T.decodeFileEither configCodec path
case res of
Right config -> loadConfig' config
Left err -> do
print err
exitFailure
loadConfig' :: Config False -> IO (Config True)
loadConfig' config = do
loaded <- LB.readFile (lintconfig config) >>= \res ->
case eitherDecode res :: Either String LintConfig' of
Left err -> error $ "config file invalid: " <> show err
Right file -> pure file
pure $ config { lintconfig = loaded }
setJobStatus :: MVar ServerState -> RemoteRef -> JobStatus -> IO ()
setJobStatus mvar !ref !status = modifyMVar_ mvar
$ pure . over jobs (M.insert ref status)
setRegistry :: MVar ServerState -> UUID -> RemoteRef -> IO ()
setRegistry mvar !uuid !ref = modifyMVar_ mvar
$ pure . over registry (M.insert uuid ref)
|
