dpaw-monorail-plugin/src/plugin.js

JS library to link the brocket network to the QGIS/monorail server

/**
 * @fileOverview
 * @name plugin.js
 * @author Gavin Coombes
 * @license BSD-3-Clause
 *
 */
'use strict';

let Cycle = require('@cycle/core');
let CycleDOM = require('@cycle/dom');
let Rx = require('rx');
let u = require('dpaw-brocket-utility');

let h = CycleDOM.h;
let makeDOMDriver = CycleDOM.makeDOMDriver;
let makeRelayDriver = require('./relay-driver');
let log = u.log;
let Obs = Rx.Observable;

// let Relay = require('dpaw-brocket-relay');

let intent = require('./intent');
let model = require('./model');
let view = require('./view');
let xform = require('./transform');
let command = require('./command');
let LogComponent = require('./logs-component');


// UPDATED!
function main({DOM, relay}) {
  let {channel, port} = parseQuery(window.location);
  console.log(`Parsed channel ${channel} and port ${port}`);

  // Incoming streams
  let incoming$     = relay;
  let incomingLog   = LogComponent(DOM, incoming$, {title: 'Incoming'});


  // The Command Object takes a stream of commands and options and
  // returns any messages returning from qgis.
  let commandOpts = {channelName: channel, port: port};
  let command$ = incoming$
        .map(xform.appwards)
        .do(cmd => log('Plugin: transformed cmd', cmd))
        .filter(cmd => !u.isNull(cmd));
  let qgisOutgoing$ = command(command$, commandOpts);

  // Outgoing streams
  let outgoing$ = Obs.combineLatest(
    Obs.interval(10000),
    Obs.just({tag: 'monorail:plugin:beat', payload: 'dadum'}),
    (i, msg) => msg
  );

  // Main loop
  let action$       = intent(DOM, incoming$);
  let state$        = model(action$, incoming$);
  let newDOM        = view(state$, incomingLog.vtree$);

  return {
    DOM: newDOM,
    relay: outgoing$
  };
}

Cycle.run(main, {
  DOM: makeDOMDriver('#app'),
  relay: makeRelayDriver()
});



function parseQuery(location) {
  log('Parsing query string');
  let reChannel = /[\\?&]channel=([^&#]*)/;
  let rePort = /[\\?&]port=([^&#]*)/;
  let [_, channel] = reChannel.exec(location.search);
  let [__, port] = rePort.exec(location.search);
  return {channel, port};
}