Copy redux/examples/async and update to use Babel 6

Author: Ryan Ashcraft

examples/async/.babelrc

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+{
+  "presets": ["react", "es2015"],
+  "env": {
+    "development": {
+      "presets": ["react-hmre"]
+    }
+  }
+}

examples/async/actions/index.js

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+import fetch from 'isomorphic-fetch'
+
+export const REQUEST_POSTS = 'REQUEST_POSTS'
+export const RECEIVE_POSTS = 'RECEIVE_POSTS'
+export const SELECT_REDDIT = 'SELECT_REDDIT'
+export const INVALIDATE_REDDIT = 'INVALIDATE_REDDIT'
+
+export function selectReddit(reddit) {
+  return {
+    type: SELECT_REDDIT,
+    reddit
+  }
+}
+
+export function invalidateReddit(reddit) {
+  return {
+    type: INVALIDATE_REDDIT,
+    reddit
+  }
+}
+
+function requestPosts(reddit) {
+  return {
+    type: REQUEST_POSTS,
+    reddit
+  }
+}
+
+function receivePosts(reddit, json) {
+  return {
+    type: RECEIVE_POSTS,
+    reddit: reddit,
+    posts: json.data.children.map(child => child.data),
+    receivedAt: Date.now()
+  }
+}
+
+function fetchPosts(reddit) {
+  return dispatch => {
+    dispatch(requestPosts(reddit))
+    return fetch(`https://www.reddit.com/r/${reddit}.json`)
+      .then(response => response.json())
+      .then(json => dispatch(receivePosts(reddit, json)))
+  }
+}
+
+function shouldFetchPosts(state, reddit) {
+  const posts = state.postsByReddit[reddit]
+  if (!posts) {
+    return true
+  }
+  if (posts.isFetching) {
+    return false
+  }
+  return posts.didInvalidate
+}
+
+export function fetchPostsIfNeeded(reddit) {
+  return (dispatch, getState) => {
+    if (shouldFetchPosts(getState(), reddit)) {
+      return dispatch(fetchPosts(reddit))
+    }
+  }
+}

examples/async/components/Picker.js

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+import React, { Component, PropTypes } from 'react'
+
+export default class Picker extends Component {
+  render() {
+    const { value, onChange, options } = this.props
+
+    return (
+      <span>
+        <h1>{value}</h1>
+        <select onChange={e => onChange(e.target.value)}
+                value={value}>
+          {options.map(option =>
+            <option value={option} key={option}>
+              {option}
+            </option>)
+          }
+        </select>
+      </span>
+    )
+  }
+}
+
+Picker.propTypes = {
+  options: PropTypes.arrayOf(
+    PropTypes.string.isRequired
+  ).isRequired,
+  value: PropTypes.string.isRequired,
+  onChange: PropTypes.func.isRequired
+}

examples/async/components/Posts.js

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+import React, { PropTypes, Component } from 'react'
+
+export default class Posts extends Component {
+  render() {
+    return (
+      <ul>
+        {this.props.posts.map((post, i) =>
+          <li key={i}>{post.title}</li>
+        )}
+      </ul>
+    )
+  }
+}
+
+Posts.propTypes = {
+  posts: PropTypes.array.isRequired
+}

examples/async/containers/App.js

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+import React, { Component, PropTypes } from 'react'
+import { connect } from 'react-redux'
+import { selectReddit, fetchPostsIfNeeded, invalidateReddit } from '../actions'
+import Picker from '../components/Picker'
+import Posts from '../components/Posts'
+
+class App extends Component {
+  constructor(props) {
+    super(props)
+    this.handleChange = this.handleChange.bind(this)
+    this.handleRefreshClick = this.handleRefreshClick.bind(this)
+  }
+
+  componentDidMount() {
+    const { dispatch, selectedReddit } = this.props
+    dispatch(fetchPostsIfNeeded(selectedReddit))
+  }
+
+  componentWillReceiveProps(nextProps) {
+    if (nextProps.selectedReddit !== this.props.selectedReddit) {
+      const { dispatch, selectedReddit } = nextProps
+      dispatch(fetchPostsIfNeeded(selectedReddit))
+    }
+  }
+
+  handleChange(nextReddit) {
+    this.props.dispatch(selectReddit(nextReddit))
+  }
+
+  handleRefreshClick(e) {
+    e.preventDefault()
+
+    const { dispatch, selectedReddit } = this.props
+    dispatch(invalidateReddit(selectedReddit))
+    dispatch(fetchPostsIfNeeded(selectedReddit))
+  }
+
+  render() {
+    const { selectedReddit, posts, isFetching, lastUpdated } = this.props
+    return (
+      <div>
+        <Picker value={selectedReddit}
+                onChange={this.handleChange}
+                options={[ 'reactjs', 'frontend' ]} />
+        <p>
+          {lastUpdated &&
+            <span>
+              Last updated at {new Date(lastUpdated).toLocaleTimeString()}.
+              {' '}
+            </span>
+          }
+          {!isFetching &&
+            <a href="#"
+               onClick={this.handleRefreshClick}>
+              Refresh
+            </a>
+          }
+        </p>
+        {isFetching && posts.length === 0 &&
+          <h2>Loading...</h2>
+        }
+        {!isFetching && posts.length === 0 &&
+          <h2>Empty.</h2>
+        }
+        {posts.length > 0 &&
+          <div style={{ opacity: isFetching ? 0.5 : 1 }}>
+            <Posts posts={posts} />
+          </div>
+        }
+      </div>
+    )
+  }
+}
+
+App.propTypes = {
+  selectedReddit: PropTypes.string.isRequired,
+  posts: PropTypes.array.isRequired,
+  isFetching: PropTypes.bool.isRequired,
+  lastUpdated: PropTypes.number,
+  dispatch: PropTypes.func.isRequired
+}
+
+function mapStateToProps(state) {
+  const { selectedReddit, postsByReddit } = state
+  const {
+    isFetching,
+    lastUpdated,
+    items: posts
+  } = postsByReddit[selectedReddit] || {
+    isFetching: true,
+    items: []
+  }
+
+  return {
+    selectedReddit,
+    posts,
+    isFetching,
+    lastUpdated
+  }
+}
+
+export default connect(mapStateToProps)(App)

examples/async/index.html

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+<!DOCTYPE html>
+<html>
+  <head>
+    <title>Redux async example</title>
+  </head>
+  <body>
+    <div id="root">
+    </div>
+    <script src="/static/bundle.js"></script>
+  </body>
+</html>

examples/async/index.js

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+import 'babel-polyfill'
+import React from 'react'
+import { render } from 'react-dom'
+import { Provider } from 'react-redux'
+import App from './containers/App'
+import configureStore from './store/configureStore'
+
+const store = configureStore()
+
+render(
+  <Provider store={store}>
+    <App />
+  </Provider>,
+  document.getElementById('root')
+)

examples/async/package.json

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+{
+  "name": "redux-async-example",
+  "version": "0.0.0",
+  "description": "Redux async example",
+  "scripts": {
+    "start": "node server.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/rackt/redux.git"
+  },
+  "keywords": [
+    "react",
+    "reactjs",
+    "hot",
+    "reload",
+    "hmr",
+    "live",
+    "edit",
+    "webpack",
+    "flux"
+  ],
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/rackt/redux/issues"
+  },
+  "homepage": "http://rackt.github.io/redux",
+  "dependencies": {
+    "babel-polyfill": "^6.3.14",
+    "isomorphic-fetch": "^2.1.1",
+    "react": "^0.14.0",
+    "react-dom": "^0.14.0",
+    "react-redux": "^4.0.0",
+    "redux": "^3.0.0",
+    "redux-logger": "^2.0.2",
+    "redux-thunk": "^0.1.0"
+  },
+  "devDependencies": {
+    "babel-core": "^6.2.1",
+    "babel-loader": "^6.2.0",
+    "babel-preset-es2015": "^6.3.13",
+    "babel-preset-react": "^6.3.13",
+    "babel-preset-react-hmre": "^1.0.0",
+    "expect": "^1.6.0",
+    "express": "^4.13.3",
+    "node-libs-browser": "^0.5.2",
+    "webpack": "^1.12.9",
+    "webpack-dev-middleware": "^1.4.0",
+    "webpack-hot-middleware": "^2.6.0"
+  }
+}

examples/async/reducers/index.js

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+import { combineReducers } from 'redux'
+import {
+  SELECT_REDDIT, INVALIDATE_REDDIT,
+  REQUEST_POSTS, RECEIVE_POSTS
+} from '../actions'
+
+function selectedReddit(state = 'reactjs', action) {
+  switch (action.type) {
+    case SELECT_REDDIT:
+      return action.reddit
+    default:
+      return state
+  }
+}
+
+function posts(state = {
+  isFetching: false,
+  didInvalidate: false,
+  items: []
+}, action) {
+  switch (action.type) {
+    case INVALIDATE_REDDIT:
+      return Object.assign({}, state, {
+        didInvalidate: true
+      })
+    case REQUEST_POSTS:
+      return Object.assign({}, state, {
+        isFetching: true,
+        didInvalidate: false
+      })
+    case RECEIVE_POSTS:
+      return Object.assign({}, state, {
+        isFetching: false,
+        didInvalidate: false,
+        items: action.posts,
+        lastUpdated: action.receivedAt
+      })
+    default:
+      return state
+  }
+}
+
+function postsByReddit(state = { }, action) {
+  switch (action.type) {
+    case INVALIDATE_REDDIT:
+    case RECEIVE_POSTS:
+    case REQUEST_POSTS:
+      return Object.assign({}, state, {
+        [action.reddit]: posts(state[action.reddit], action)
+      })
+    default:
+      return state
+  }
+}
+
+const rootReducer = combineReducers({
+  postsByReddit,
+  selectedReddit
+})
+
+export default rootReducer

examples/async/server.js

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+var webpack = require('webpack')
+var webpackDevMiddleware = require('webpack-dev-middleware')
+var webpackHotMiddleware = require('webpack-hot-middleware')
+var config = require('./webpack.config')
+
+var app = new (require('express'))()
+var port = 3000
+
+var compiler = webpack(config)
+app.use(webpackDevMiddleware(compiler, { noInfo: true, publicPath: config.output.publicPath }))
+app.use(webpackHotMiddleware(compiler))
+
+app.get("/", function(req, res) {
+  res.sendFile(__dirname + '/index.html')
+})
+
+app.listen(port, function(error) {
+  if (error) {
+    console.error(error)
+  } else {
+    console.info("==> 🌎  Listening on port %s. Open up http://localhost:%s/ in your browser.", port, port)
+  }
+})