refactor: minor restructure to move logic out of main controller file to src/api

src/api/activitypub.js

@@ -0,0 +1,53 @@
+'use strict';
+
+/**
+ * DEVELOPMENT NOTE
+ *
+ * THIS FILE IS UNDER ACTIVE DEVELOPMENT AND IS EXPLICITLY EXCLUDED FROM IMMUTABILITY GUARANTEES
+ *
+ * If you use api methods in this file, be prepared that they may be removed or modified with no warning.
+ */
+
+const db = require('../database');
+const activitypub = require('../activitypub');
+
+const activitypubApi = module.exports;
+
+activitypubApi.follow = async (caller, { actorId } = {}) => {
+	if (!actorId) {
+		throw new Error('[[error:invalid-uid]]'); // should be activitypub-specific
+	}
+
+	await activitypub.send(caller.uid, actorId, {
+		type: 'Follow',
+		object: {
+			type: 'Person',
+			name: actorId,
+		},
+	});
+
+	const now = Date.now();
+	await Promise.all([
+		db.sortedSetAdd(`followingRemote:${caller.uid}`, now, actorId),
+		db.incrObjectField(`user:${caller.uid}`, 'followingRemoteCount'),
+	]);
+};
+
+activitypubApi.unfollow = async (caller, { actorId }) => {
+	if (!actorId) {
+		throw new Error('[[error:invalid-uid]]'); // should be activitypub-specific
+	}
+
+	await activitypub.send(caller.uid, actorId, {
+		type: 'Unfollow',
+		object: {
+			type: 'Person',
+			name: actorId,
+		},
+	});
+
+	await Promise.all([
+		db.sortedSetRemove(`followingRemote:${caller.uid}`, actorId),
+		db.decrObjectField(`user:${caller.uid}`, 'followingRemoteCount'),
+	]);
+};