lmorchard/substack-to-opml.js

## substack-to-opml.js
// To use this script:
//
// 1. Copy this whole gist
// 2. Log into your account on substack.com
// 3. On a substack.com page, open the JavaScript console in your browser's web dev tools
// 4. Paste this into the console and hit return.
// 5. You should see substack-publications.opml has been downloaded.
//
// If you'd like to grab this code and improve it or turn it into a better tool, go right ahead!
// Maybe drop me a toot at @lmorchard@hackers.town or @lmorchard@toot.lmorchard.com if you liked it.

fetch("https://substack.com/api/v1/subscriptions")
	.then(res => res.json())
	.then(subscriptionsData => {
		const feeds = subscriptionsData.publications.map(item => ({
			text: item.name,
			type: "rss",
			htmlUrl: item.base_url,
			xmlUrl: item.base_url + "/feed"
		}));
		const nodes = feeds.map(feed => `
			<outline type="rss"
				text="${feed.text}"
				htmlUrl="${feed.htmlUrl}"
				xmlUrl="${feed.xmlUrl}" />
		`.trim());
		const opml = `
			<opml version='2.0'>
				<body>
					<outline text="Substack Publications" title="Substack Publications">
						${nodes.join("\n")}
					</outline>
				</body>
			</opml>
		`.trim();

		const data = new Blob([opml], {type: "application/xml"});
		const url = window.URL.createObjectURL(data);

		const a = document.createElement("a");
		a.textContent = "DOWNLOAD SUBSTACK OPML EXPORT";
		a.href = url;
		a.download = "substack-publications.opml";

		document.body.insertBefore(a, document.body.firstChild);
		a.click();
	});
	// To use this script:
	//
	// 1. Copy this whole gist
	// 2. Log into your account on substack.com
	// 3. On a substack.com page, open the JavaScript console in your browser's web dev tools
	// 4. Paste this into the console and hit return.
	// 5. You should see substack-publications.opml has been downloaded.
	//
	// If you'd like to grab this code and improve it or turn it into a better tool, go right ahead!
	// Maybe drop me a toot at @lmorchard@hackers.town or @lmorchard@toot.lmorchard.com if you liked it.

	fetch("https://substack.com/api/v1/subscriptions")
	.then(res => res.json())
	.then(subscriptionsData => {
	const feeds = subscriptionsData.publications.map(item => ({
	text: item.name,
	type: "rss",
	htmlUrl: item.base_url,
	xmlUrl: item.base_url + "/feed"
	}));
	const nodes = feeds.map(feed => `
	<outline type="rss"
	text="${feed.text}"
	htmlUrl="${feed.htmlUrl}"
	xmlUrl="${feed.xmlUrl}" />
	`.trim());
	const opml = `
	<opml version='2.0'>
	<body>
	<outline text="Substack Publications" title="Substack Publications">
	${nodes.join("\n")}
	</outline>
	</body>
	</opml>
	`.trim();

	const data = new Blob([opml], {type: "application/xml"});
	const url = window.URL.createObjectURL(data);

	const a = document.createElement("a");
	a.textContent = "DOWNLOAD SUBSTACK OPML EXPORT";
	a.href = url;
	a.download = "substack-publications.opml";

	document.body.insertBefore(a, document.body.firstChild);
	a.click();
	});