'use strict';

const sep = require('path').sep;
// add suffix (".html" or sep for windows test) to each part of regex
// to ignore possible occurrences in titles (e.g. blog posts)
const isEditable = `(security|index).html|(about|download|docs|foundation|get-involved|knowledge)\\${sep}`;
const isEditableReg = new RegExp(isEditable);

// This middleware adds "Edit on GitHub" links to every editable page
function githubLinks(options) {
  return (files, m, next) => {
    Object.keys(files).forEach((path) => {
      if (!isEditableReg.test(path)) {
        return;
      }

      const file = files[path];
      path = path.replace('.html', '.md').replace(/\\/g, '/');
      const url = `https://github.com/nodejs/nodejs.org/edit/main/locale/${options.locale}/${path}`;

      const contents =
        file.contents.toString() +
        ` <input type = "hidden" id = "editOnGitHubUrl" value="${url}"/> `;

      file.contents = Buffer.from(contents);
    });

    next();
  };
}

module.exports = githubLinks;