From 7e1dac39eaaa0e86910359cf434492dcb41912e4 Mon Sep 17 00:00:00 2001
From: Julian Lam <julian@nodebb.org>
Date: Sun, 28 May 2023 15:42:29 -0400
Subject: [PATCH] feat: followers and following endpoints

---
 src/controllers/activitypub.js | 36 ++++++++++++++++++++++++++++++++++
 src/routes/activitypub.js      |  3 +++
 2 files changed, 39 insertions(+)

diff --git a/src/controllers/activitypub.js b/src/controllers/activitypub.js
index 921e59cf2c..9e4527c7ac 100644
--- a/src/controllers/activitypub.js
+++ b/src/controllers/activitypub.js
@@ -40,6 +40,42 @@ Controller.getActor = async (req, res) => {
 	});
 };
 
+Controller.getFollowing = async (req, res) => {
+	const { followingCount: totalItems } = await user.getUserFields(res.locals.uid, ['followingCount']);
+
+	const page = parseInt(req.query.page, 10) || 1;
+	const resultsPerPage = 50;
+	const start = Math.max(0, page - 1) * resultsPerPage;
+	const stop = start + resultsPerPage - 1;
+
+	let orderedItems = await user.getFollowing(res.locals.uid, start, stop);
+	orderedItems = orderedItems.map(({ userslug }) => `${nconf.get('url')}/user/${userslug}`);
+	res.status(200).json({
+		'@context': 'https://www.w3.org/ns/activitystreams',
+		type: 'OrderedCollection',
+		totalItems,
+		orderedItems,
+	});
+};
+
+Controller.getFollowers = async (req, res) => {
+	const { followerCount: totalItems } = await user.getUserFields(res.locals.uid, ['followerCount']);
+
+	const page = parseInt(req.query.page, 10) || 1;
+	const resultsPerPage = 50;
+	const start = Math.max(0, page - 1) * resultsPerPage;
+	const stop = start + resultsPerPage - 1;
+
+	let orderedItems = await user.getFollowers(res.locals.uid, start, stop);
+	orderedItems = orderedItems.map(({ userslug }) => `${nconf.get('url')}/user/${userslug}`);
+	res.status(200).json({
+		'@context': 'https://www.w3.org/ns/activitystreams',
+		type: 'OrderedCollection',
+		totalItems,
+		orderedItems,
+	});
+};
+
 Controller.getOutbox = async (req, res) => {
 	// stub
 	res.status(200).json({
diff --git a/src/routes/activitypub.js b/src/routes/activitypub.js
index f96484a7b2..02fe9a2bf0 100644
--- a/src/routes/activitypub.js
+++ b/src/routes/activitypub.js
@@ -5,6 +5,9 @@ module.exports = function (app, middleware, controllers) {
 
 	app.get('/user/:userslug', middlewares, controllers.activitypub.getActor);
 
+	app.get('/user/:userslug/following', middlewares, controllers.activitypub.getFollowing);
+	app.get('/user/:userslug/followers', middlewares, controllers.activitypub.getFollowers);
+
 	app.get('/user/:userslug/outbox', middlewares, controllers.activitypub.getOutbox);
 	app.post('/user/:userslug/outbox', middlewares, controllers.activitypub.postOutbox);