git.r.bdr.sh - rbdr/blog/blob - lib/generators/rss.js

   1 'use strict';
   2
   3 const { template } = require('dot');
   4 const { encodeXML } = require('entities');
   5 const { readFile, writeFile } = require('fs/promises');
   6 const { join } = require('path');
   7 const { debuglog } = require('util');
   8
   9 const internals = {
  10   debuglog: debuglog('blog'),
  11
  12   kFeedName: 'feed.xml'
  13 };
  14
  15 /**
  16  * Generates an RSS feed XML file
  17  *
  18  * @name RSSGenerator
  19  * @param {string} source the source directory
  20  * @param {string} target the target directory
  21  * @param {Array.<Blog.tPost>} posts the list of posts
  22  */
  23 module.exports = async function RSSGenerator(source, target, posts) {
  24
  25   internals.debuglog('Generating RSS');
  26   const feedTarget = join(target, internals.kFeedName);
  27   const feedLocation = join(source, internals.kFeedName);
  28
  29   internals.debuglog(`Reading ${feedLocation}`);
  30   const feedTemplate = await readFile(feedLocation, { encoding: 'utf8' });
  31
  32   internals.debuglog('Writing RSS');
  33   posts = posts.map((post) => ({
  34     ...post,
  35     createdOn: (new Date(post.createdOn)).toUTCString(),
  36     html: encodeXML(post.html)
  37   }));
  38   const feedXml = template(feedTemplate)({ posts });
  39   await writeFile(feedTarget, feedXml);
  40 };
  41
  42