feat: ability to view federated profiles via url manipulation

src/activitypub/helpers.js

@@ -0,0 +1,32 @@
+'use strict';
+
+const request = require('request-promise-native');
+
+const Helpers = module.exports;
+
+Helpers.query = async (id) => {
+	const [username, hostname] = id.split('@');
+	if (!username || !hostname) {
+		return false;
+	}
+
+	// Make a webfinger query to retrieve routing information
+	const response = await request(`https://${hostname}/.well-known/webfinger?resource=acct:${id}`, {
+		simple: false,
+		resolveWithFullResponse: true,
+		json: true,
+	});
+
+	if (response.statusCode !== 200 || !response.body.hasOwnProperty('links')) {
+		return false;
+	}
+
+	// Parse links to find actor endpoint
+	let actorUri = response.body.links.filter(link => link.type === 'application/activity+json' && link.rel === 'self');
+	if (actorUri.length) {
+		actorUri = actorUri.pop();
+		({ href: actorUri } = actorUri);
+	}
+
+	return { username, hostname, actorUri };
+};