Node example for downloading event XMLs

readme.md

Usage:

$ npx {url of this gist} {hostname} {user} {password} {absolute dir path}

Example:

$ npx https://gist.github.com/kuu/6eeeec31cd27eb33af5358db840a9dd0 192.168.100.230 elemental 'E1ementa!5' `pwd`

File wrote to: /home/kuu/live_event_1.xml
File wrote to: /home/kuu/live_event_2.xml
File wrote to: /home/kuu/live_event_3.xml

get-xml.js

#!/usr/bin/env node

const fs = require('fs');
const path = require('path');
const {URL} = require('url');
const qs = require('querystring');
const ElementalApi = require('elemental-api');
const xmlJs = require('xml-js');

const HOST = process.argv[2];
const USER = process.argv[3];
const PASS = process.argv[4];
const DEST = process.argv[5];
const api = new ElementalApi(HOST, USER, PASS);

main();

function main() {
  fetchEvents(`http://${HOST}/live_events?per_page=10`)
  .then(() => {
    console.log('Done');
  })
  .catch(err => {
    console.error(err.stack);
  });
}

function unescape(xml) {
  xml = decodeURIComponent(xml);
  xml = xml.replace('&lt;', '<');
  xml = xml.replace('&gt;', '>');
  xml = xml.replace('&amp;', '&');
  xml = xml.replace('&nbsp;', ' ');
  return xml;
}

function fetchEvents(urlStr, promises) {
  const {pathname, search} = new URL(urlStr);
  const params = search ? qs.parse(search.slice(1)) : {};
  return api.get(pathname, params)
  .then(xml => {
    const unescapedXml = unescape(xml);
    const {live_event_list: list} = JSON.parse(xmlJs.xml2json(unescapedXml, {compact: true, sanitize: true}));
    if (!promises) {
      promises = [];
    }
    if (list.live_event) {
      let itor = list.live_event;
      if (typeof itor[Symbol.iterator] !== 'function') {
        itor = [itor];
      }
      for (const {_attributes: event} of itor) {
        promises.push(api.get(event.href, {clean: true}).then(writeFile));
      }
    }
    if (list.next) {
      return fetchEvents(list.next._attributes.href, promises);
    }
    return Promise.all(promises);
  });
}

function writeFile(xml) {
  return new Promise((resolve, reject) => {
    const {live_event: event} = JSON.parse(xmlJs.xml2json(xml, {compact: true, sanitize: true}));
    const arr = event._attributes.href.split('/');
    const id = arr[arr.length - 1];
    const filePath = path.join(DEST, `live_event_${id}.xml`);
    fs.writeFile(filePath, xml, err => {
      if (err) {
        return reject(err);
      }
      console.log(`File wrote to: ${filePath}`);
      return resolve();
    });
  });
}

package.json

{
  "name": "get-xml",
  "version": "1.0.0",
  "description": "Node example for downloading event XMLs",
  "bin": "./get-xml.js",
  "dependencies": {
    "elemental-api": "0.0.5",
    "xml-js": "^1.6.11"
  }
}