add frontend (boilerplate)

backend/app/Main.hs

@@ -112,7 +112,7 @@ main = do
       pure (Commit cid colls)
   A.execParser (A.info (args <**> A.helper) A.idm) >>= \case
     Args {cmd = Serve} -> do
-      W.runEnv 8080 $ \req respond -> do
+      W.runEnv 8081 $ \req respond -> do
         case P.parseOnly routeP (W.rawPathInfo req) of
           Right (SchemaJson path) -> do
             let [c] = filter ((== path) . (.path)) (head repo.commits).collections

backend/backend.cabal

@@ -1,5 +1,5 @@
 cabal-version: 3.4
-name:          acms
+name:          backend
 version:       0.1.0.0
 license:       BSD-3-Clause
 license-file:  LICENSE
@@ -7,7 +7,7 @@ maintainer:    aforemny@posteo.de
 author:        Alexander Foremny
 build-type:    Simple
 
-executable acms
+executable backend
     main-is:            Main.hs
     hs-source-dirs:     app
     default-language:   GHC2021

cabal.project

@@ -1 +1 @@
-packages: ./*.cabal autotypes/*.cabal
+packages: */*.cabal

default.nix

@@ -2,22 +2,40 @@
 , sources ? import ./nix/sources.nix
 }:
 let
-  haskellPackages = pkgs.haskellPackages.override {
+  haskellPackages = pkgs.haskell.packages.ghc98.override {
     overrides = self: super: {
-      acms = self.callCabal2nix "acms" ./. { };
       astore = self.callCabal2nix "astore" sources.json2sql { };
       autotypes = self.callCabal2nix "autotypes" ./autotypes { };
-      json2sql = self.callCabal2nix "json2sql" sources.json2sql { };
+      backend = self.callCabal2nix "backend" ./backend { };
+      frontend = self.callCabal2nix "frontend" ./frontend { };
+      websockets = pkgs.haskell.lib.doJailbreak super.websockets;
+    };
+  };
+
+  jsHaskellPackages = pkgs.pkgsCross.ghcjs.haskell.packages.ghc98.override {
+    overrides = self: super: {
+      frontend = self.callCabal2nix "frontend" ./frontend { };
     };
   };
 in
 rec {
-  inherit (haskellPackages) acms;
+  inherit (haskellPackages) backend;
+  inherit (jsHaskellPackages) frontend;
   shell = haskellPackages.shellFor {
-    packages = _: [ acms haskellPackages.autotypes ];
+    packages = _: [
+      haskellPackages.autotypes
+      haskellPackages.backend
+      haskellPackages.frontend
+    ];
     buildInputs = [
       haskellPackages.cabal-install
       haskellPackages.ormolu
+      (pkgs.writeScriptBin "reload" ''
+        set -efu
+        ${haskellPackages.ghcid.bin}/bin/ghcid -c \
+          '${haskellPackages.cabal-install}/bin/cabal new-repl' \
+          -T ':run Main.main'
+      '')
     ];
     withHoogle = true;
     withHaddock = true;

frontend/LICENSE

@@ -0,0 +1,30 @@
+Copyright (c) 2024, Alexander Foremny
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Alexander Foremny nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

frontend/app/Main.hs

@@ -0,0 +1,77 @@
+module Main where
+
+#ifndef ghcjs_HOST_OS
+import Language.Javascript.JSaddle.Warp as JSaddle
+#endif
+
+import Data.ByteString.UTF8 qualified as B
+import Data.Maybe
+import Miso
+import Miso.String
+
+#ifndef ghcjs_HOST_OS
+import Network.HTTP.Simple
+import Data.String
+#else
+import JavaScript.Web.XMLHttpRequest
+#endif
+
+type Model = Maybe Schema
+
+type Schema = String
+
+data Action
+  = FetchSchema
+  | SetSchema Schema
+  deriving (Show, Eq)
+
+#ifndef ghcjs_HOST_OS
+runApp :: JSM () -> IO ()
+runApp f = JSaddle.debugOr 8080 (f >> syncPoint) JSaddle.jsaddleApp
+#else
+runApp :: IO () -> IO ()
+runApp app = app
+#endif
+
+main :: IO ()
+main = runApp $ startApp App {..}
+  where
+    initialAction = FetchSchema
+    model = Nothing
+    update = updateModel
+    view = viewModel
+    events = defaultEvents
+    subs = []
+    mountPoint = Nothing
+    logLevel = Off
+
+updateModel :: Action -> Model -> Effect Action Model
+updateModel action m =
+  case action of
+    FetchSchema -> m <# do SetSchema <$> fetchSchema
+    SetSchema schema -> noEff (Just schema)
+
+fetchSchema :: JSM String
+fetchSchema = fetch "http://localhost:8081/posts.schema.json"
+
+#ifndef ghcjs_HOST_OS
+fetch :: String -> JSM String
+fetch url = B.toString . getResponseBody <$> httpBS (fromString url)
+#else
+fetch :: String -> JSM String
+fetch url = maybe "" B.toString . contents <$> xhrByteString req
+  where
+    req =
+      Request
+        { reqMethod = GET,
+          reqURI = pack url,
+          reqLogin = Nothing,
+          reqHeaders = [],
+          reqWithCredentials = False,
+          reqData = NoData
+        }
+#endif
+
+viewModel :: Model -> View Action
+viewModel schema =
+  div_ [] [text (toMisoString (fromMaybe ".." schema))]

frontend/frontend.cabal

@@ -0,0 +1,31 @@
+cabal-version:   3.4
+name:            frontend
+version:         0.1.0.0
+license:         BSD-3-Clause
+license-file:    LICENSE
+maintainer:      aforemny@posteo.de
+author:          Alexander Foremny
+build-type:      Simple
+extra-doc-files: CHANGELOG.md
+
+executable frontend
+    main-is:            Main.hs
+    hs-source-dirs:     app
+    default-language:   GHC2021
+    default-extensions: CPP OverloadedStrings RecordWildCards
+    ghc-options:        -Wall
+    build-depends:
+        base,
+        bytestring,
+        containers,
+        miso,
+        text,
+        utf8-string
+
+    if !arch(javascript)
+        build-depends: jsaddle-warp
+
+    if arch(javascript)
+        build-depends: ghcjs-base
+    else
+        build-depends: http-conduit

nix/sources.json

@@ -11,10 +11,10 @@
         "homepage": null,
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "6c43a3495a11e261e5f41e5d7eda2d71dae1b2fe",
-        "sha256": "16f329z831bq7l3wn1dfvbkh95l2gcggdwn6rk3cisdmv2aa3189",
+        "rev": "a7d95e2b0029b8ee30facbe664b62968c59b46a6",
+        "sha256": "0vprwa4h794bjd92arjnzdm8lb8mg3xvpfmqbk723zcxnvmpnafn",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/6c43a3495a11e261e5f41e5d7eda2d71dae1b2fe.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/a7d95e2b0029b8ee30facbe664b62968c59b46a6.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }