eunomia-controller/source/generate/sitemap/sitemap.js

const fs = require(`fs`);
const ejs = require(`ejs`);
const common = require('./../../common')
const eunomia = require(`./../../variables`)(`./eunomia.json`);

exports.generate = (publicPath) => require(`./../../task/index`)(`sitemap`, (resolve, reject) => {
  // If the eunomia.json file does not exist
  if (!fs.existsSync(`./eunomia.json`)) {
    reject("Could not find the `eunomia.json` file in your project root")
  }
  else {
    // Broken eunomia json structure
    if (typeof eunomia === 'undefined' || eunomia === null) {
      reject("The `eunomia.json` contains broken JSON")
      return false
    }

    // Missing generate structure within your json structure
    if (typeof eunomia.generate === 'undefined') {
      reject("Missing a top-level `generate` field within the eunomia.json file")
      return false
    }

    // Missing sitemap structure within your generate json object
    if (typeof eunomia.generate.sitemap === 'undefined') {
      reject("Missing sitemap json object within the generate json object")
      return false
    }

    // If the module is disabled
    if (typeof eunomia.generate.sitemap.enabled !== 'undefined') {
      if (!eunomia.generate.sitemap.enabled) {
        resolve()
        return false
      }
    }

    // If the sitemap routes object are undefined
    if (typeof eunomia.generate.sitemap.routes === 'undefined') {
      reject("The eunomia json structure requires a generate.sitemap.routes json object")
    }
    else {
      // If the routes file does not exist
      if (!fs.existsSync(eunomia.generate.sitemap.routes)) {
        reject("file " + eunomia.generate.sitemap.routes + " does not exists")
      }
      else {
        try {
          const routes = JSON.parse(fs.readFileSync(eunomia.generate.sitemap.routes, `utf8`));
          const fullPath = `${__dirname}/sitemap.ejs`
          const template = fs.readFileSync(fullPath, `utf8`);
          const render = ejs.compile(template, { filename: fullPath });
          const urls = routes
            .filter(url => !url.path.includes(`:`))
            .map(url => ({
              loc: url.path
            }));
          const output = render({config: eunomia.generate.sitemap, urls});
          fs.writeFileSync(`${publicPath}/sitemap.xml`, output, `utf8`);
          resolve()
        }
        catch (e) {
          console.log(e)
          reject("Failed to create a sitemap.txt")
        }
      }
    }
  }
});