useAff example

3 years ago · b3434288d6
--- a/+ 201
+++ b/+ 201
@@ -0,0 +1,201 @@
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   Copyright 2020 Ken Aguilar

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--- a/README.md
+++ b/README.md
@@ -0,0 +1 @@
 # notes-examples
--- a/spago-react-hooks-login/.gitignore
+++ b/spago-react-hooks-login/.gitignore
@@ -0,0 +1,14 @@
 bower_components/
 node_modules/
 .pulp-cache/
 output/
 generated-docs/
 .psc-package/
 .psc*
 .purs*
 .psa*
 .spago
 dist/
 .spago/
 .cache/
 index.js
--- a/spago-react-hooks-login/Makefile
+++ b/spago-react-hooks-login/Makefile
@@ -0,0 +1,20 @@
 build:
 	spago build

 build-watch:
 	spago build --watch --clear-screen

 build-production:
 	spago bundle-app && parcel npx build html/index.html

 bundle:
 	spago bundle-app

 bundle-watch:
 	spago bundle-app --watch

 clean:
 	rm -rf .cache .spago .psci_modules node_modules output dist index.js

 start:
 	npx parcel html/index.html
--- a/spago-react-hooks-login/README.md
+++ b/spago-react-hooks-login/README.md
@@ -0,0 +1,30 @@
 # spago-react-scaffold

 Build the project
 ``` sh
 make build
 ```

 Build and watch the project
 ``` sh
 make build-watch
 ```

 Bundle the app to `index.js`

 ``` sh
 make bundle
 ```

 ### App development workflow
 This is probably not ideal.

 On one terminal run
 ``` sh
 make bundle-watch
 ```
 On another, run this command so the application will run on the browser
 ``` sh
 make start
 ```

--- a/spago-react-hooks-login/html/index.html
+++ b/spago-react-hooks-login/html/index.html
@@ -0,0 +1,10 @@
 <!doctype html>
 <html>
  <head>
    <title>Spago React Scaffold</title>
  </head>
  <body>
    <div id="app"><div>
    <script type="text/javascript" src="../index.js"></script>
  </body>
 </html>
--- a/spago-react-hooks-login/package-lock.json
+++ b/spago-react-hooks-login/package-lock.json
--- a/spago-react-hooks-login/package.json
+++ b/spago-react-hooks-login/package.json
@@ -0,0 +1,14 @@
 {
  "name": "spago-react-scaffold",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "react": "^16.13.0",
    "react-dom": "^16.13.0",
    "parcel-bundler": "^1.12.4"
  }
 }
--- a/spago-react-hooks-login/packages.dhall
+++ b/spago-react-hooks-login/packages.dhall
@@ -0,0 +1,128 @@
 {-
 Welcome to your new Dhall package-set!

 Below are instructions for how to edit this file for most use
 cases, so that you don't need to know Dhall to use it.

 ## Warning: Don't Move This Top-Level Comment!

 Due to how `dhall format` currently works, this comment's
 instructions cannot appear near corresponding sections below
 because `dhall format` will delete the comment. However,
 it will not delete a top-level comment like this one.

 ## Use Cases

 Most will want to do one or both of these options:
 1. Override/Patch a package's dependency
 2. Add a package not already in the default package set

 This file will continue to work whether you use one or both options.
 Instructions for each option are explained below.

 ### Overriding/Patching a package

 Purpose:
 - Change a package's dependency to a newer/older release than the
    default package set's release
 - Use your own modified version of some dependency that may
    include new API, changed API, removed API by
    using your custom git repo of the library rather than
    the package set's repo

 Syntax:
 Replace the overrides' "{=}" (an empty record) with the following idea
 The "//" or "⫽" means "merge these two records and
  when they have the same value, use the one on the right:"
 -------------------------------
 let override =
  { packageName =
      upstream.packageName // { updateEntity1 = "new value", updateEntity2 = "new value" }
  , packageName =
      upstream.packageName // { version = "v4.0.0" }
  , packageName =
      upstream.packageName // { repo = "https://www.example.com/path/to/new/repo.git" }
  }
 -------------------------------

 Example:
 -------------------------------
 let overrides =
  { halogen =
      upstream.halogen // { version = "master" }
  , halogen-vdom =
      upstream.halogen-vdom // { version = "v4.0.0" }
  }
 -------------------------------

 ### Additions

 Purpose:
 - Add packages that aren't already included in the default package set

 Syntax:
 Replace the additions' "{=}" (an empty record) with the following idea:
 -------------------------------
 let additions =
  { package-name =
       { dependencies =
           [ "dependency1"
           , "dependency2"
           ]
       , repo =
           "https://example.com/path/to/git/repo.git"
       , version =
           "tag ('v4.0.0') or branch ('master')"
       }
  , package-name =
       { dependencies =
           [ "dependency1"
           , "dependency2"
           ]
       , repo =
           "https://example.com/path/to/git/repo.git"
       , version =
           "tag ('v4.0.0') or branch ('master')"
       }
  , etc.
  }
 -------------------------------

 Example:
 -------------------------------
 let additions =
  { benchotron =
      { dependencies =
          [ "arrays"
          , "exists"
          , "profunctor"
          , "strings"
          , "quickcheck"
          , "lcg"
          , "transformers"
          , "foldable-traversable"
          , "exceptions"
          , "node-fs"
          , "node-buffer"
          , "node-readline"
          , "datetime"
          , "now"
          ]
      , repo =
          "https://github.com/hdgarrood/purescript-benchotron.git"
      , version =
          "v7.0.0"
      }
  }
 -------------------------------
 -}


 let upstream =
      https://github.com/purescript/package-sets/releases/download/psc-0.13.6-20200127/packages.dhall sha256:06a623f48c49ea1c7675fdf47f81ddb02ae274558e29f511efae1df99ea92fb8

 let overrides = {=}

 let additions = {=}

 in  upstream // overrides // additions
--- a/spago-react-hooks-login/spago.dhall
+++ b/spago-react-hooks-login/spago.dhall
@@ -0,0 +1,22 @@
 {-
 Welcome to a Spago project!
 You can edit this file as you like.
 -}
 { name = "spago-react-scaffold"
 , dependencies =
    [ "aff"
    , "affjax"
    , "argonaut-codecs"
    , "argonaut-core"
    , "console"
    , "effect"
    , "exceptions"
    , "psci-support"
    , "react-basic"
    , "react-basic-hooks"
    , "web-dom"
    , "web-html"
    ]
 , packages = ./packages.dhall
 , sources = [ "src/**/*.purs", "test/**/*.purs" ]
 }
--- a/spago-react-hooks-login/src/Component/Login.purs
+++ b/spago-react-hooks-login/src/Component/Login.purs
@@ -0,0 +1,76 @@
 module Component.Login where

 import Prelude ( pure, ($), (>>>), Unit, bind, void, const )
 import Data.Maybe ( fromMaybe, Maybe(..) )
 import Data.Argonaut.Encode.Class ( encodeJson )
 import Data.Argonaut.Core ( stringify )
 import Data.Either ( Either(..) )
 -- Aff
 import Affjax as AX
 import Affjax.ResponseFormat as ResponseFormat
 import Affjax.RequestBody as RequestBody
 import Effect.Aff ( launchAff )
 -- Effect
 import Effect ( Effect )
 import Effect.Class.Console ( log )
 import Effect.Uncurried ( EffectFn1 )
 -- React
 import React.Basic.DOM as R
 import React.Basic.Events ( handler, SyntheticEvent, EventHandler )
 import React.Basic.DOM.Events ( targetValue, preventDefault, stopPropagation )
 import React.Basic.Hooks as React
 import React.Basic.Hooks ( component, ReactComponent, Hook, UseState, useState,
                           (/\) )

 mkLogin :: Effect ( ReactComponent {} )
 mkLogin = do
  component "Login" \props -> React.do
    email <- useInput ""
    password <- useInput ""
    pure
      $ R.form
        { onSubmit: submitHandler $ { email: email.value, password: password.value }
        , children:
          [ R.input { onChange: email.onChange, placeholder: "email" }
          , R.input { onChange: password.onChange, placeholder: "password" }
          , R.button_ [ R.text "Sign-In" ]
          ]
        }

 submitHandler :: Login -> EffectFn1 SyntheticEvent Unit
 submitHandler login =
  handler ( preventDefault >>> stopPropagation ) $ const do
    submitLogin login

 type Login =
  { email :: String
  , password :: String
  }

 submitLogin :: Login -> Effect Unit
 submitLogin login = void $ launchAff $ do
  result <- AX.post
    ResponseFormat.json "http://localhost:8080/login"
    ( Just $ RequestBody.json $ encodeJson login )
  case result of
    Left err -> log $ AX.printError err
    Right res -> log $ stringify res.body

 useInput
  :: String
  -> Hook
    ( UseState { value :: String } )
    { onChange :: EventHandler
    , value :: String
    }
 useInput initialValue = React.do
  { value } /\ replaceState <- useState { value: initialValue }
  pure
    { onChange:
      handler
        ( preventDefault >>> stopPropagation >>> targetValue ) \val -> do
        replaceState \_ ->
          { value: fromMaybe "" val
          }
    , value
    }
--- a/spago-react-hooks-login/src/Component/LoginAff.purs
+++ b/spago-react-hooks-login/src/Component/LoginAff.purs
@@ -0,0 +1,79 @@
 module Component.LoginAff where

 import Prelude
 import Data.Maybe ( Maybe(..), fromMaybe )
 import Data.Argonaut.Encode.Class ( encodeJson )
 import Data.Argonaut.Core ( Json )
 import Data.Either ( Either )
 -- Effect
 import Effect ( Effect )
 -- Aff
 import Affjax as AX
 import Affjax.ResponseFormat as ResponseFormat
 import Affjax.RequestBody as RequestBody
 import Effect.Aff ( Aff, never )
 -- React
 import React.Basic.Hooks as React
 import React.Basic.Hooks ( ReactComponent, component, Hook, UseState, useState, (/\) )
 import React.Basic.Hooks.Aff ( useAff )
 import React.Basic.DOM as R
 import React.Basic.Events ( handler, EventHandler )
 import React.Basic.DOM.Events ( preventDefault, stopPropagation, targetValue )

 mkLoginAff :: Effect ( ReactComponent {} )
 mkLoginAff = do
  component "LoginAff" $ const React.do
    isSubmitting/\setSubmitting <- useState false
    email <- useInput ""
    password <- useInput ""
    login/\setLogin <- useState { email: "", password: "" }
    useAff login $ do
      void $ submitLogin isSubmitting { email: login.email, password: login.password }
      pure $ setSubmitting \_ -> false
    pure
      $ R.form_
        [ R.input
          { placeholder: "email"
          , onChange: email.onChange
          }
        , R.input
          { placeholder: "password"
          , onChange: password.onChange
          }
        , R.button
          { onClick: handler ( preventDefault >>> stopPropagation >>> targetValue ) \_ -> do
               setSubmitting \_ -> true
               setLogin \_ -> login { email = email.value, password = password.value }
          , children: [ R.text "Sign-In" ]
          }
        ]

 type Login =
  { email :: String
  , password :: String
  }

 submitLogin :: Boolean -> Login -> Aff ( Either AX.Error Json )
 submitLogin isSubmitting login = do
  if not isSubmitting
  then never
  else do
    result <- AX.post  ResponseFormat.json "http://localhost:8080/login"
      ( Just $ RequestBody.json $ encodeJson login )
    pure $ _.body <$> result

 useInput
  :: String
  -> Hook
    ( UseState String )
    { onChange :: EventHandler
    , value :: String
    }
 useInput initialValue = React.do
  value /\ replaceValue <- useState initialValue
  pure
    { onChange: handler
    ( preventDefault >>> stopPropagation >>> targetValue ) \val -> do
      replaceValue \_ -> fromMaybe "" val
    , value
    }
--- a/spago-react-hooks-login/src/Component/Title.purs
+++ b/spago-react-hooks-login/src/Component/Title.purs
@@ -0,0 +1,18 @@
 module Component.Title
  ( mkTitle
  ) where

 import Prelude ( ($), pure )
 import React.Basic.DOM as R
 import React.Basic.Hooks ( ReactComponent, component )
 import Effect ( Effect )

 type Props = { text :: String }

 mkTitle :: Effect ( ReactComponent Props )
 mkTitle = do
  component "Title" $ \props -> React.do
    pure $
      R.h1_
        [ R.text props.text ]

--- a/spago-react-hooks-login/src/Main.purs
+++ b/spago-react-hooks-login/src/Main.purs
@@ -0,0 +1,37 @@
 module Main where

 import Prelude ( Unit, bind, map, ($), (=<<), const, pure )
 import React.Basic.DOM as R
 import Web.DOM.NonElementParentNode ( getElementById )
 import Web.HTML.HTMLDocument ( toNonElementParentNode )
 import Web.HTML.Window ( document )
 import Web.HTML ( window )
 import Data.Maybe ( Maybe(..) )
 import Effect.Exception ( throw )
 import Component.Title
 import Component.Login ( mkLogin )
 import Component.LoginAff ( mkLoginAff )
 import Effect ( Effect )
 import React.Basic.Hooks ( element, ReactComponent, component )

 mkMainComponent :: Effect ( ReactComponent {} )
 mkMainComponent = do
  title <- mkTitle
  login <- mkLogin
  loginAff <- mkLoginAff
  component "Main" $ const React.do
    pure $
      R.div_
        [ element title { text: "Hello, World" }
        -- , element login {}
        , element loginAff {}
        ]

 main :: Effect Unit
 main = do
  mApp <- getElementById "app" =<< ( map toNonElementParentNode $ document =<< window )
  case mApp of
    Nothing -> throw "App element not found."
    Just app -> do
      mainComponent <- mkMainComponent
      R.render ( element mainComponent {} ) app
--- a/spago-react-hooks-login/test/Main.purs
+++ b/spago-react-hooks-login/test/Main.purs
@@ -0,0 +1,11 @@
 module Test.Main where

 import Prelude

 import Effect (Effect)
 import Effect.Class.Console (log)

 main :: Effect Unit
 main = do
  log "🍝"
  log "You should add some tests."