Dummy front
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12
default.nix
12
default.nix
@ -1,11 +1,18 @@
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{ nixpkgs, haskellPackages }:
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let jsaddle = nixpkgs.fetchFromGitHub {
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let
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jsaddle = nixpkgs.fetchFromGitHub {
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owner = "ghcjs";
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repo = "jsaddle";
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rev = "68208be806c49a2a0c9f037dfac85feae10a8c80";
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sha256 = "0acj0x716ikfb08ndib36jmwxkwq399lvkip46sfkh1ynn0pvc1c";
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};
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};
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miso = nixpkgs.fetchFromGitHub {
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owner = "dmjio";
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repo = "miso";
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rev = "a9c4f0a3a6e7d87f9432dc6cf4b1d0c052bf7ef1";
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sha256 = "1yq5y4vffslm6abnfnggp5m3k6vla6mzcwmhmm23l8yizsvdkwv2";
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};
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in
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@ -19,6 +26,7 @@ in
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generic-lens = nixpkgs.haskell.lib.dontCheck super.generic-lens;
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jsaddle-warp = nixpkgs.haskell.lib.dontCheck (super.callPackage (jsaddle + "/jsaddle-warp") {});
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jsaddle = super.callPackage (jsaddle + "/jsaddle") {};
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miso = super.callPackage (miso + "/miso-ghc-jsaddle.nix") {};
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};
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tools = with haskellPackages; [
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ghcid
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@ -23,5 +23,6 @@ executable frontend
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, common
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, miso
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, jsaddle-warp
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, mtl
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hs-source-dirs: src
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default-language: Haskell2010
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@ -1,4 +1,41 @@
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{-# LANGUAGE GeneralizedNewtypeDeriving #-}
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{-# LANGUAGE LambdaCase #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE RecordWildCards #-}
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module Main where
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import Control.Monad.Trans (liftIO)
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import Language.Javascript.JSaddle.Warp
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import Miso
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import Miso.String
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data Action = Add
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| Subtract
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| SayHello
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| NoOp
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newtype Model = Model Int deriving (Eq, Num, ToMisoString)
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updateModel :: Action -> Model -> Effect Action Model
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updateModel Add m = noEff (m + 1)
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updateModel Subtract m = noEff (m - 1)
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updateModel SayHello m = m <# (liftIO (putStrLn "Hello world") >> pure NoOp)
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updateModel NoOp m = noEff m
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viewModel :: Model -> View Action
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viewModel x =
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div_ [] [ button_ [ onClick Add ] [ text "+" ]
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, text (ms x)
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, button_ [ onClick Subtract ] [ text "-" ]
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]
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main :: IO ()
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main = putStrLn "Hello, Haskell!"
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main = run 8081 $ startApp App{..}
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where
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model = Model 0
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initialAction = SayHello
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update = updateModel
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view = viewModel
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subs = []
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events = defaultEvents
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mountPoint = Nothing
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