Created
October 11, 2012 07:46
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Demonstrate conversion from standard Yesod to yesod-pure
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{-# LANGUAGE MultiParamTypeClasses #-} | |
{-# LANGUAGE OverloadedStrings #-} | |
{-# LANGUAGE TypeFamilies #-} | |
import Control.Applicative ((<|>)) | |
import Text.Blaze.Html (toValue, (!)) | |
import qualified Text.Blaze.Html5 as H | |
import qualified Text.Blaze.Html5.Attributes as HA | |
import Yesod.Pure.NoRoute | |
instance Yesod App | |
type Handler = GHandler App App | |
fibR :: Int -> Route App | |
fibR i = AppRoute ["fib", toPathPiece i] | |
getHomeR :: Handler RepHtml | |
getHomeR = defaultLayout $ do | |
setTitle "Hello World!" | |
toWidget $ \render -> do | |
H.p "Hello World" | |
H.a ! HA.href (toValue $ render (fibR 5) []) $ "Fifth fib" | |
addCSS "p { color: red }" | |
getFibR :: Int -> Handler RepHtml | |
getFibR i = defaultLayout $ do | |
setTitle "Fibs" | |
toWidget $ \render -> do | |
H.p $ do | |
"Fib for " | |
toHtml i | |
": " | |
toHtml $ fibs !! i | |
H.a ! HA.href (toValue $ render (fibR $ i + 1) []) $ "Next fib" | |
fib :: Int -> Int | |
fib i = fibs !! i | |
fibs :: [Int] | |
fibs = 0 : 1 : zipWith (+) fibs (tail fibs) | |
main :: IO () | |
main = warpDebug 3000 $ App $ | |
method "GET" (serve getHomeR) | |
<|> static "fib" (dynamic $ \i -> method "GET" $ serve $ getFibR i) |
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