Sidebar munging

sidebars-script.js

const fs = require('fs');
const yaml = require('js-yaml');
const cheerio = require("cheerio");

const sidebars_file = "sidebars.yaml";

async function getTitle(url) {
  await fetch(url)
    .then(result => result.text())
    .then(html => {
        const $ = cheerio.load(html);
        const title = $('title').text();
        return title;
    }).catch(error => {
        console.log(error);
    })

}

async function prepare (entry, groups) {
  // construct the object 
  item = new Object();

  item.page = entry.page ? entry.page : "";
  item.groups = groups;

  if(entry.page) {
    // it's a page
    item.type = "page";
    item.label = entry.label ? entry.label : "";

    if (entry.page.substr(-3) == ".md") {
      const slug = entry.page.substr(0,entry.page.length-3);
      item.url = entry.page ? "https://beta-docs.redocly.com/" +  slug: "";
      if (item.label == "") {
        item.label = await getTitle("http://localhost:4000/" + slug + "/");
      }
    }
  } else if (entry.group) {
    // it's a group
    item.type = "group";
    item.label = entry.group ? entry.group : "-";
    item.url = entry.page ? "https://beta-docs.redocly.com/" + entry.page : "";

  } else if (entry.separator) {
    item.type = "separator";
  }

  if( item.label == "" && entry.group) {
    item.label = entry.group;
  }

  // build output string
  if(item.type == "page" || item.type == "group") {
    console.log(
      item.label
      + ", " + item.type
      + ", " + item.page
      + ", " + item.url
      + ", " + item.groups.join(",")
    );
  }

  if(entry.items) {
    let new_groups = Array.from(groups);
    new_groups.push(entry.group);
    process(entry.items, new_groups);
  }
}

async function process(data, groups) {
  if(data instanceof Array) {
    data.forEach((entry) => {
      prepare (entry, groups);
    });
  }
}

console.log(" > Sidebar started");

let rawdata = fs.readFileSync(sidebars_file);
let nav = yaml.load(rawdata);
process(nav, ["Main"]).then(() => {
  console.log(" > Sidebars managed");
});