Add webpack cold reloading

On changes to the react bundle
webpack will store the current redux state
in localStorage, waits (to allow the server to restart)
then refreshes the page. On page load, it checks if it
has state stored and loads it into the app.

client/cold-reload.js

@@ -0,0 +1,16 @@
+import store from 'store';
+
+const key = '__cold-storage__';
+export function isColdStored() {
+  return store.has(key);
+}
+
+export function getColdStorage() {
+  const coldReloadData = store.get(key);
+  store.remove(key);
+  return coldReloadData;
+}
+
+export function saveToColdStorage(data) {
+  store.set(key, data);
+}

client/index.js

@@ -6,7 +6,7 @@ import { Router } from 'react-router';
 import { routeReducer as routing, syncHistory } from 'react-router-redux';
 import { createHistory } from 'history';
 
-import app$ from '../common/app';
+import createApp from '../common/app';
 import provideStore from '../common/app/provide-store';
 
 // client specific sagas
@@ -14,20 +14,26 @@ import sagas from './sagas';
 
 // render to observable
 import render from '../common/app/utils/render';
+import {
+  isColdStored,
+  getColdStorage,
+  saveToColdStorage
+} from './cold-reload';
+
+Rx.config.longStackSupport = !!debug.enabled;
 
 const log = debug('fcc:client');
 const DOMContainer = document.getElementById('fcc');
-const initialState = window.__fcc__.data;
+const hotReloadTimeout = 5000;
 const csrfToken = window.__fcc__.csrf.token;
+const initialState = isColdStored() ?
+  getColdStorage() :
+  window.__fcc__.data;
 initialState.app.csrfToken = csrfToken;
 
 const serviceOptions = { xhrPath: '/services', context: { _csrf: csrfToken } };
 
-Rx.config.longStackSupport = !!debug.enabled;
 const history = createHistory();
-const appLocation = history.createLocation(
-  location.pathname + location.search
-);
 const routingMiddleware = syncHistory(history);
 
 const devTools = window.devToolsExtension ? window.devToolsExtension() : f => f;
@@ -35,9 +41,8 @@ const shouldRouterListenForReplays = !!window.devToolsExtension;
 
 const clientSagaOptions = { doc: document };
 
-// returns an observable
-app$({
-  location: appLocation,
+
+createApp({
     history,
     serviceOptions,
     initialState,
@@ -48,24 +53,23 @@ app$({
     reducers: { routing },
     enhancers: [ devTools ]
   })
-  .flatMap(({ props, store }) => {
-
-    // because of weirdness in react-routers match function
-    // we replace the wrapped returned in props with the first one
-    // we passed in. This might be fixed in react-router 2.0
-    props.history = history;
-
+  .doOnNext(({ store }) => {
     if (shouldRouterListenForReplays && store) {
       log('routing middleware listening for replays');
       routingMiddleware.listenForReplays(store);
     }
-
-    log('rendering');
-    return render(
+    if (module.hot && typeof module.hot.accept === 'function') {
+      module.hot.accept('../common/app', function() {
+        saveToColdStorage(store.getState());
+        setTimeout(() => window.location.reload(), hotReloadTimeout);
+      });
+    }
+  })
+  .doOnNext(() => log('rendering'))
+  .flatMap(({ props, store }) => render(
     provideStore(React.createElement(Router, props), store),
     DOMContainer
-    );
-  })
+  ))
   .subscribe(
     () => debug('react rendered'),
     err => { throw err; },

gulpfile.js

@@ -21,7 +21,9 @@ var Rx = require('rx'),
   sourcemaps = require('gulp-sourcemaps'),
 
   // react app
-  webpack = require('webpack-stream'),
+  webpack = require('webpack'),
+  webpackStream = require('webpack-stream'),
+  WebpackDevServer = require('webpack-dev-server'),
   webpackConfig = require('./webpack.config.js'),
   webpackConfigNode = require('./webpack.config.node.js'),
 
@@ -55,7 +57,6 @@ var paths = {
   serverIgnore: [
     'gulpfile.js',
     'public/',
-    '!public/js/bundle*',
     'node_modules/',
     'client/',
     'seed',
@@ -225,7 +226,6 @@ var syncDepenedents = [
   'js',
   'less',
   'dependents',
-  'pack-watch',
   'build-manifest'
 ];
 
@@ -269,7 +269,7 @@ gulp.task('pack-client', function() {
 
   return gulp.src(webpackConfig.entry)
     .pipe(plumber({ errorHandler: errorHandler }))
-    .pipe(webpack(Object.assign(
+    .pipe(webpackStream(Object.assign(
       {},
       webpackConfig,
       webpackOptions
@@ -289,51 +289,47 @@ gulp.task('pack-client', function() {
     .pipe(gulp.dest(paths.manifest));
 });
 
-var defaultStatsOptions = {
-  colors: gutil.colors.supportsColor,
-  hash: false,
-  timings: false,
-  chunks: false,
-  chunkModules: false,
-  modules: false,
-  children: true,
-  version: true,
-  cached: false,
-  cachedAssets: false,
-  reasons: false,
-  source: false,
-  errorDetails: false
-};
-
 var webpackCalled = false;
-gulp.task('pack-watch', function(cb) {
+gulp.task('webpack-dev-server', function(cb) {
   if (webpackCalled) {
-    console.log('webpack watching already runnning');
+    console.log('webpack dev server already runnning');
     return cb();
   }
-  gulp.src(webpackConfig.entry)
-    .pipe(plumber({ errorHandler: errorHandler }))
-    .pipe(webpack(Object.assign(
-      {},
-      webpackConfig,
-      webpackOptions,
-      { watch: true }
-    ), null, function(notUsed, stats) {
-      if (stats) {
-        gutil.log(stats.toString(defaultStatsOptions));
+  var devServerOptions = {
+    headers: {
+      'Access-Control-Allow-Credentials': 'true'
+    },
+    hot: true,
+    noInfo: true,
+    contentBase: false,
+    publicPath: '/js'
+  };
+  webpackConfig.entry = [
+    'webpack-dev-server/client?http://localhost:2999/',
+    'webpack/hot/dev-server'
+  ].concat(webpackConfig.entry);
+
+  var compiler = webpack(webpackConfig);
+  var devServer = new WebpackDevServer(compiler, devServerOptions);
+  devServer.use(function(req, res, next) {
+    res.setHeader('Access-Control-Allow-Origin', req.headers.origin || '*');
+    next();
+  });
+  return devServer.listen('2999', 'localhost', function(err) {
+      if (err) {
+        throw new gutil.PluginError('webpack-dev-server', err);
       }
 
       if (!webpackCalled) {
-        debug('webpack init completed');
+        gutil.log('[webpack-dev-server]', 'webpack init completed');
         webpackCalled = true;
         cb();
       }
 
-    }))
-    .pipe(gulp.dest(webpackConfig.output.path));
+    });
 });
 
-gulp.task('pack-watch-manifest', ['pack-watch'], function() {
+gulp.task('pack-watch-manifest', function() {
   var manifestName = 'react-manifest.json';
   var dest = webpackConfig.output.path;
   return gulp.src(dest + '/bundle.js')
@@ -520,8 +516,6 @@ var watchDependents = [
   'dependents',
   'serve',
   'sync',
-  'pack-watch',
-  'pack-watch-manifest',
   'build-manifest'
 ];
 
@@ -540,14 +534,12 @@ gulp.task('watch', watchDependents, function() {
     ['dependents']
   );
   gulp.watch(paths.manifest + '/*.json', ['build-manifest-watch']);
-  gulp.watch(webpackConfig.output.path + '/bundle.js', ['pack-watch-manifest']);
 });
 
 gulp.task('default', [
   'less',
   'serve',
-  'pack-watch',
-  'pack-watch-manifest',
+  'webpack-dev-server',
   'build-manifest-watch',
   'watch',
   'sync'

package.json

@@ -135,6 +135,7 @@
     "url-regex": "^3.0.0",
     "validator": "^5.0.0",
     "webpack": "^1.9.12",
+    "webpack-dev-server": "^1.14.1",
     "webpack-stream": "^3.1.0",
     "xss-filters": "^1.2.6",
     "yargs": "^4.1.0",

server/boot/a-react.js

@@ -5,7 +5,7 @@ import debug from 'debug';
 import renderToString from '../../common/app/utils/render-to-string';
 import provideStore from '../../common/app/provide-store';
 
-import app$ from '../../common/app';
+import createApp from '../../common/app';
 
 const log = debug('fcc:react-server');
 
@@ -14,7 +14,8 @@ const log = debug('fcc:react-server');
 const routes = [
   '/videos',
   '/videos/*',
-  '/challenges'
+  '/challenges',
+  '/map'
 ];
 
 const devRoutes = [];
@@ -37,9 +38,9 @@ export default function reactSubRouter(app) {
 
   function serveReactApp(req, res, next) {
     const serviceOptions = { req };
-    app$({
-      location: req.path,
-      serviceOptions
+    createApp({
+      serviceOptions,
+      location: req.path
     })
       // if react-router does not find a route send down the chain
       .filter(({ redirect, props }) => {
@@ -47,7 +48,7 @@ export default function reactSubRouter(app) {
           res.redirect(redirect.pathname + redirect.search);
         }
         if (!props) {
-          log(`react tried to find ${location.pathname} but got 404`);
+          log(`react tried to find ${req.path} but got 404`);
           return next();
         }
         return !!props;

server/middlewares/csp.js

@@ -5,7 +5,11 @@ let trusted = [
 ];
 
 if (process.env.NODE_ENV !== 'production') {
-  trusted.push('ws://localhost:3001');
+  trusted = trusted.concat([
+    'ws://localhost:3001',
+    'http://localhost:2999',
+    'ws://localhost:2999'
+  ]);
 }
 
 export default function csp() {

server/middlewares/jade-helpers.js

@@ -1,4 +1,7 @@
 const challengesRegex = /^(bonfire|waypoint|zipline|basejump|checkpoint):\s/i;
+import config from '../../webpack.config';
+
+const __DEV__ = process.env.NODE_ENV !== 'production';
 
 export default function jadeHelpers() {
   return function jadeHelpersMiddleware(req, res, next) {
@@ -6,6 +9,12 @@ export default function jadeHelpers() {
       return str.replace(challengesRegex, '');
     };
 
+    res.locals.getBundleLocation = function getBundleLocation() {
+      return __DEV__ ?
+        config.output.publicPath + '/bundle.js' :
+        'js/bundle.js';
+    };
+
     next();
   };
 }

server/server.js

@@ -3,12 +3,14 @@ var pmx = require('pmx');
 pmx.init();
 
 var _ = require('lodash'),
+    Rx = require('rx'),
     loopback = require('loopback'),
     boot = require('loopback-boot'),
     expressState = require('express-state'),
     path = require('path'),
     setupPassport = require('./component-passport');
 
+Rx.config.longStackSupport = process.env.NODE_DEBUG !== 'production';
 var app = loopback();
 var isBeta = !!process.env.BETA;
 

server/views/layout-react.jade

@@ -10,4 +10,4 @@ html(lang='en')
     #fcc!= markup
     script!= state
     script(src=rev('/js', 'vendor-challenges.js'))
-    script(src=rev('/js', 'bundle.js'))
+    script(src=getBundleLocation())

webpack.config.js

@@ -1,15 +1,15 @@
 var webpack = require('webpack');
 var path = require('path');
-var webpack = require('webpack');
 
 var __DEV__ = process.env.NODE_ENV !== 'production';
 
 module.exports = {
   entry: './client',
+  devtool: 'inline-source-map',
   output: {
     filename: 'bundle.js',
     path: path.join(__dirname, '/public/js'),
-    publicPath: 'public/'
+    publicPath: __DEV__ ? 'http://localhost:2999/js' : '/js'
   },
   module: {
     loaders: [
@@ -42,6 +42,8 @@ module.exports = {
         'NODE_ENV': JSON.stringify(__DEV__ ? 'development' : 'production')
       },
       '__DEVTOOLS__': !__DEV__
-    })
+    }),
+    new webpack.HotModuleReplacementPlugin(),
+    new webpack.NoErrorsPlugin()
   ]
 };