cordova-elm-template-jumpstart/template_src/src/launchElm.js

Cordova template to jumpstart development using Elm and Webpack

/*
 * This file is responsible for launching Elm and connecting it to the outside world.
 *
 * The returned function is assumed to be run *after* all the initialization has executed.
 *
 * If you want to do something with the function (eg: attach a handler to a port), then
 * define that as a JavaScript module in ./launchElm.d -- we require every *.js file in
 * that directory. We assume that it exports a function, and we pass that function the
 * app as the first argument.
 * */

import Promise from "bluebird";
import _ from "lodash";

const appHandlers = require.context(
  "./launchElm.d/", // Directory where the handlers live
  true,             // Whether or not to look in subdirectories
  /\.js$/i          // Filename regex defining files to process
);

module.exports = Promise.try(
  () => console.info("Starting Elm application")
).then(
  () => require("./elm/Main.elm")
).then(Elm =>
  Elm.Main.fullscreen({
    assets: require("./assets.js"),
  })
).tap(
  () => console.info("Launched application; now processing app handlers")
).then(
  app => {
    console.info("Passing app into handlers", app, appHandlers.keys());
    return Promise.map(
      appHandlers.keys(), appHandlers
    ).map(
      handlerModule => handlerModule(app)
    ).all().return(app)
  }
).catch(e => {
  console.error("Error launching application", e);
  throw e;
}).finally(
  () => console.info("Done launching application and processing app handlers")
)