const fs = require('fs');
const yaml = require('yaml');
const path = require('path');
const async = require('async');
const dedent = require('dedent');
const blogAuthorsFile = fs.readFileSync(
path.join(__dirname, '../src/data/blog/authors.yaml'),
{ encoding: 'utf-8' }
);
const blogAuthors = yaml.parse(blogAuthorsFile);
const applyBlogAuthors = metadataAuthors =>
metadataAuthors
.split(' and ')
.map(authorName => {
const foundAuthor = blogAuthors.find(
author => author.name === authorName
);
return foundAuthor ? `'${foundAuthor.id}'` : authorName;
})
.join(', ');
// eslint-disable-next-line import/no-extraneous-dependencies
const metadataParser = require('markdown-yaml-metadata-parser');
const commandLineArgs = process.argv.slice(2);
const getMarkdownFilesPath = args => (args.length ? args[0] : '.');
const markdownPath = path.join(getMarkdownFilesPath(commandLineArgs));
const processMarkdownFile = (originalSlug, source) => {
const { content, metadata } = metadataParser(source);
const dateFromMetadata = new Date(metadata.date);
const dateString = dateFromMetadata.toISOString().split('T')[0];
const newFileName = `${dateString}-${originalSlug}.md`;
const metadataAuthors = metadata.author
? `[${applyBlogAuthors(metadata.author)}]`
: `['node-js-website']`;
const newContent = dedent`
---
title: ${metadata.title}
blogAuthors: ${metadataAuthors}
category: '${metadata.category.toLowerCase()}'
---
`;
return { content: `${newContent}\n${content}`, filename: newFileName };
};
if (fs.existsSync(markdownPath)) {
const filenames = fs.readdirSync(path.join(markdownPath));
const markdownFilesFromDirectory = filenames.filter(
filename =>
filename.toLowerCase().includes('.md') &&
!filename.toLowerCase().includes('index.md')
);
const blogQueue = async.queue((filename, callback) => {
const markdownFile = path.join(markdownPath, filename);
fs.readFile(markdownFile, { encoding: 'utf-8' }, (_, data) => {
const originalSlug = filename.toLowerCase().replace('.md', '');
const { content, filename: newFileName } = processMarkdownFile(
originalSlug,
data
);
const newMarkdownFile = path.join(markdownPath, newFileName);
fs.unlink(markdownFile, () => {});
fs.writeFile(newMarkdownFile, content, () => callback());
});
});
blogQueue.push([...markdownFilesFromDirectory]);
// eslint-disable-next-line no-console
blogQueue.drain(() => console.log('Finished Processing'));
}