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|
{-# LANGUAGE NumericUnderscores #-}
{-# LANGUAGE OverloadedStrings #-}
module SpaceTraders
( SpaceTradersT
, microSinceEpoch
, newEnv
, runSpaceTradersT
, Env(..)
, HasDatabaseConn
, HasRequest
, ask
, getConn
, getLastAPICall
, getRequest
, liftIO
) where
import Control.Monad.IO.Class
import Control.Monad.Reader
import Data.IORef
import Data.Time.Clock
import Data.Time.Clock.POSIX
import qualified Database.SQLite.Simple as S
import Network.HTTP.Simple
type SpaceTradersT a = ReaderT Env IO a
newEnv :: S.Connection -> Request -> IO Env
newEnv conn req = do
r <- newIORef 0
return $ Env conn r req
runSpaceTradersT :: SpaceTradersT a -> Env -> IO a
runSpaceTradersT = runReaderT
microSinceEpoch :: IO Integer
microSinceEpoch = do
t <- getCurrentTime
return $ floor . (1e6 *) . nominalDiffTimeToSeconds $ utcTimeToPOSIXSeconds t
data Env = Env { envConn :: S.Connection
, envLastAPICall :: IORef Integer
, envRequest :: Request }
class HasDatabaseConn a where
getConn :: a -> S.Connection
instance HasDatabaseConn S.Connection where
getConn = id
instance HasDatabaseConn Env where
getConn = envConn
class HasRequest a where
getLastAPICall :: a -> IORef Integer
getRequest :: a -> Request
instance HasRequest Env where
getLastAPICall = envLastAPICall
getRequest = envRequest
|
