Initial commit

index.js

@@ -0,0 +1,102 @@
+const fs = require('fs');
+const luxon = require('luxon');
+const path = require('path');
+const minimist = require('minimist');
+const xml2js = require('xml2js');
+
+// command line argument defaults
+let inputFile = 'export.xml';
+let outputDir = 'output';
+
+function init() {
+	const argv = minimist(process.argv.slice(2));
+	if (typeof argv.inputfile === 'string') {
+		inputFile = argv.inputfile;
+	}
+	if (typeof argv.outputdir === 'string') {
+		outputDir = argv.outputdir;
+	}
+
+	let fileContent = readFile(inputFile);
+	parseFileContent(fileContent);
+}
+
+function readFile(filename) {
+	try {
+		return fs.readFileSync(filename, 'utf8');
+	} catch (ex) {
+		console.log('Unable to read file.');
+		console.log(ex.message);
+	}
+}
+
+function parseFileContent(fileContent) {
+	const processors = { tagNameProcessors: [ xml2js.processors.stripPrefix ] };
+	xml2js.parseString(fileContent, processors, (err, result) => {
+		if (err) {
+			console.log('Unable to parse file content.');
+			console.log(err);        
+		} else {
+			processPosts(result);
+		}
+	});
+}
+
+function processPosts(result) {
+	let posts = result.rss.channel[0].item
+		.filter(item => item.post_type.includes('post'))
+		.map(post => ({
+			frontmatter: {
+				slug: translateSlug(post.link[0]),
+				title: translateTitle(post.title[0]),
+				date: translateDate(post.pubDate[0])
+			},
+			content: translateContent(post.encoded[0])
+		}));
+
+		writeMarkdownFiles(posts);
+}
+
+function translateSlug(value) {
+	let url = new URL(value);
+	let trimmedPath = url.pathname.replace(/\/$/, '');
+	let pathPieces = trimmedPath.split('/');
+	return pathPieces.pop();
+}
+
+function translateTitle(value) {
+	return value;
+}
+
+function translateDate(value) {
+	return luxon.DateTime.fromRFC2822(value, { zone: 'utc' }).toISO();
+}
+
+function translateContent(value) {
+	return value.trim();
+}
+
+function writeMarkdownFiles(posts) {
+	posts.forEach(post => {
+		const dir = path.join(outputDir, post.frontmatter.slug);
+		try {
+			fs.accessSync(dir, fs.constants.F_OK);
+		} catch (ex) {
+			fs.mkdirSync(dir, { recursive: true });
+		}
+
+		const content = createMarkdownContent(post);
+		fs.writeFileSync(path.join(dir, 'index.md'), content);
+	 });
+}
+
+function createMarkdownContent(post) {
+	const frontmatter = Object.entries(post.frontmatter)
+		.reduce((accumulator, pair) => {
+			return accumulator + pair[0] + ': "' + pair[1] + '"\n'
+		}, '');
+	
+	return '---\n' + frontmatter + '---\n\n' + post.content + '\n';
+}
+
+init();