/
InMemory.purs
47 lines (38 loc) · 1.53 KB
/
InMemory.purs
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module Hyper.Node.Session.InMemory where
import Prelude
import Effect.Class (class MonadEffect, liftEffect)
import Effect (Effect)
import Effect.Console (log)
import Effect.Ref (Ref, modify_, new, read)
import Data.Map (Map)
import Data.Map as Map
import Data.Newtype (unwrap)
import Hyper.Session (class SessionStore, SessionID(..))
data InMemorySessionStore session = InMemorySessionStore (Ref (Map SessionID session))
foreign import generatedSessionID :: Effect String
instance sessionStoreInMemorySessionStore :: ( Monad m
, MonadEffect m
)
=> SessionStore
(InMemorySessionStore session)
m
session where
newSessionID _ = do
id <- liftEffect generatedSessionID
pure (SessionID id)
get (InMemorySessionStore var) id =
liftEffect do
log ("Looking up session: " <> show (unwrap id))
Map.lookup id <$> read var
put (InMemorySessionStore var) id session = do
liftEffect do
log ("Saving session: " <> unwrap id)
flip modify_ var $ Map.insert id session
delete (InMemorySessionStore var) id = do
liftEffect do
log ("Deleting session: " <> unwrap id)
flip modify_ var $ Map.delete id
newInMemorySessionStore
:: forall session
. Effect (InMemorySessionStore session)
newInMemorySessionStore = InMemorySessionStore <$> new Map.empty