Improve instance stats

src/services/following/create.ts

@@ -10,6 +10,8 @@ import renderReject from '../../remote/activitypub/renderer/reject';
 import { deliver } from '../../queue';
 import createFollowRequest from './requests/create';
 import perUserFollowingChart from '../../chart/per-user-following';
+import { registerOrFetchInstanceDoc } from '../register-or-fetch-instance-doc';
+import Instance from '../../models/instance';
 
 export default async function(follower: IUser, followee: IUser, requestId?: string) {
 	// check blocking
@@ -97,6 +99,32 @@ export default async function(follower: IUser, followee: IUser, requestId?: stri
 	});
 	//#endregion
 
+	//#region Update instance stats
+	if (isRemoteUser(follower) && isLocalUser(followee)) {
+		registerOrFetchInstanceDoc(follower.host).then(i => {
+			Instance.update({ _id: i._id }, {
+				$inc: {
+					followingCount: 1
+				}
+			});
+
+			// TODO
+			//perInstanceChart.newFollowing();
+		});
+	} else if (isLocalUser(follower) && isRemoteUser(followee)) {
+		registerOrFetchInstanceDoc(followee.host).then(i => {
+			Instance.update({ _id: i._id }, {
+				$inc: {
+					followersCount: 1
+				}
+			});
+
+			// TODO
+			//perInstanceChart.newFollower();
+		});
+	}
+	//#endregion
+
 	perUserFollowingChart.update(follower, followee, true);
 
 	// Publish follow event

src/services/note/create.ts

@@ -27,7 +27,7 @@ import activeUsersChart from '../../chart/active-users';
 
 import { erase, concat } from '../../prelude/array';
 import insertNoteUnread from './unread';
-import registerInstance from '../register-instance';
+import { registerOrFetchInstanceDoc } from '../register-or-fetch-instance-doc';
 import Instance from '../../models/instance';
 import extractMentions from '../../misc/extract-mentions';
 import extractEmojis from '../../misc/extract-emojis';
@@ -222,7 +222,7 @@ export default async (user: IUser, data: Option, silent = false) => new Promise<
 
 	// Register host
 	if (isRemoteUser(user)) {
-		registerInstance(user.host).then(i => {
+		registerOrFetchInstanceDoc(user.host).then(i => {
 			Instance.update({ _id: i._id }, {
 				$inc: {
 					notesCount: 1

src/services/register-or-fetch-instance-doc.ts

@@ -1,7 +1,7 @@
 import Instance, { IInstance } from '../models/instance';
 import federationChart from '../chart/federation';
 
-export default async function(host: string): Promise<IInstance> {
+export async function registerOrFetchInstanceDoc(host: string): Promise<IInstance> {
 	if (host == null) return null;
 
 	const index = await Instance.findOne({ host });