dpaw-monorail-plugin/src/transform.js

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

/**
 * @fileOverview
 * @name transform.js
 * @author Gavin Coombes
 * @license BSD-3-Clause
 *
 * Transform messages from the network -> QGIS ie appwards
 *  and from QGIS -> network ie. netwards
 */

let u = require('dpaw-brocket-utility');
let Rx = require('rx');

let log = u.log;
let Obs = Rx.Observable;

const APP_TAG_SEP = ':';

let Transform = {
  appwards
};

module.exports = Transform;

function appwards(msg) {
  log('Appwards received msg', msg);

  let cmd, qstring, cmdmsg;
  let {tag, payload} = msg;
  let [app, db, op] = tag.split(APP_TAG_SEP);
  if (op === 'add_feature') {
    cmd = 'add_vector_layer';
    let p = {
      data_source: '',
      layer_name: 'groovy square',
      provider_name: 'ogr',
      data: JSON.stringify(payload)
    };
    let querystring = `data_source=${p.data_source}&layer_name=${p.layer_name}&provider_name=${p.provider_name}&data=${p.data}`;
    cmdmsg = {tag: cmd, payload: querystring};
  } else {
    return null;
    // cmdmsg = msg;
  }
  return cmdmsg;
}