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'use strict';
const { template, templateSettings } = require('dot');
const { encodeXML } = require('entities');
const { readFile, writeFile } = require('fs/promises');
const { join } = require('path');
const { debuglog } = require('util');
const internals = {
debuglog: debuglog('blog'),
kFeedName: 'feed.xml',
extractTitle(postText) {
return postText.trim().split('\n')[0].replace('#', '').trim();
}
};
/**
* Generates an RSS feed XML file
*
* @name RSSGenerator
* @param {string} source the source directory
* @param {string} target the target directory
* @param {Array.<Blog.tPost>} posts the list of posts
*/
module.exports = async function RSSGenerator(source, target, posts) {
internals.debuglog('Generating RSS');
const feedTarget = join(target, internals.kFeedName);
const feedLocation = join(source, internals.kFeedName);
internals.debuglog(`Reading ${feedLocation}`);
const feedTemplate = await readFile(feedLocation, { encoding: 'utf8' });
internals.debuglog('Writing RSS');
posts = posts.map((post) => ({
...post,
createdOn: (new Date(post.createdOn)).toUTCString(),
title: internals.extractTitle(post.raw),
html: encodeXML(post.html)
}));
const feedXml = template(feedTemplate, {
...templateSettings,
strip: false
})({ posts });
await writeFile(feedTarget, feedXml);
};
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