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Example refactoring #16

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Example refactoring #16

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25 changes: 13 additions & 12 deletions example/Main.hs
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Original file line number Diff line number Diff line change
@@ -1,26 +1,27 @@
module Main where

import Data.Default (def)
import Data.Maybe (fromMaybe)
import Data.String (fromString)
import qualified Data.Vault.Lazy as Vault

import Network.Wai
import Network.Wai (Application, pathInfo, responseLBS, vault)
import Network.Wai.Session (withSession, Session)
import Network.Wai.Session.Map (mapStore_)
import Network.Wai.Handler.Warp (run)
import Network.HTTP.Types (ok200)
import Web.Cookie (defaultSetCookie)

app :: Vault.Key (Session IO String String) -> Application
app session env = (>>=) $ do
u <- sessionLookup "u"
sessionInsert "u" insertThis
return $ responseLBS ok200 [] $ maybe (fromString "Nothing") fromString u
where
insertThis = show $ pathInfo env
Just (sessionLookup, sessionInsert) = Vault.lookup session (vault env)
app vaultKey request respond = do
u <- sessionLookup "u"
sessionInsert "u" path
respond . responseLBS ok200 [] . fromString $ fromMaybe "Nothing" u;
where
path = show $ pathInfo request
Just (sessionLookup, sessionInsert) = Vault.lookup vaultKey (vault request)

main :: IO ()
main = do
session <- Vault.newKey
store <- mapStore_
run 3000 $ withSession store (fromString "SESSION") def session $ app session
vaultKey <- Vault.newKey
store <- mapStore_
run 3000 . withSession store (fromString "SESSION") defaultSetCookie vaultKey $ app vaultKey