Chore: Convert to typescript some functions from app/lib/server/functions (#24519)

Co-authored-by: Pierre Lehnen <pierre.lehnen@rocket.chat>

apps/meteor/app/lib/server/functions/addUserToDefaultChannels.ts

@@ -3,7 +3,7 @@ import type { IRoom, IUser } from '@rocket.chat/core-typings';
 import { Rooms, Subscriptions, Messages } from '../../../models/server';
 import { callbacks } from '../../../../lib/callbacks';
 
-export const addUserToDefaultChannels = function (user: IUser, silenced: boolean): void {
+export const addUserToDefaultChannels = function (user: IUser, silenced?: boolean): void {
 	callbacks.run('beforeJoinDefaultChannels', user);
 	const defaultRooms = Rooms.findByDefaultAndTypes(true, ['c', 'p'], {
 		fields: { usernames: 0 },

apps/meteor/app/lib/server/functions/getStatusText.ts

 import { Users } from '../../../models/server';
 
-export const getStatusText = function (userId: string): unknown {
+export const getStatusText = function (userId: string): string | undefined {
 	if (!userId) {
-		return undefined;
+		return;
 	}
 
 	const fields = {

apps/meteor/app/lib/server/functions/setRealName.ts

@@ -8,15 +8,19 @@ import { hasPermission } from '../../../authorization/server';
 import { RateLimiter } from '../lib';
 import { api } from '../../../../server/sdk/api';
 
-export const _setRealName = function (userId: string, name: string, fullUser: IUser): unknown {
+export const _setRealName = function (userId: string, name: string, fullUser: IUser): IUser | undefined {
 	name = s.trim(name);
 
 	if (!userId || (settings.get('Accounts_RequireNameForSignUp') && !name)) {
-		return false;
+		return;
 	}
 
 	const user = fullUser || Users.findOneById(userId);
 
+	if (!user) {
+		return;
+	}
+
 	// User already has desired name, return
 	if (user.name && s.trim(user.name) === name) {
 		return user;

apps/meteor/app/lib/server/functions/setRoomAvatar.ts

@@ -7,7 +7,7 @@ import { Rooms, Messages } from '../../../models/server';
 import { Avatars } from '../../../models/server/raw';
 import { api } from '../../../../server/sdk/api';
 
-export const setRoomAvatar = async function (rid: string, dataURI: string, user: IUser): Promise<unknown> {
+export const setRoomAvatar = async function (rid: string, dataURI: string, user: IUser): Promise<void> {
 	const fileStore = FileUpload.getStore('Avatars');
 
 	const current = await Avatars.findOneByRoomId(rid);

apps/meteor/app/lib/server/functions/setStatusText.ts

 import { Meteor } from 'meteor/meteor';
 import s from 'underscore.string';
+import type { IUser } from '@rocket.chat/core-typings';
 
 import { Users } from '../../../models/server';
 import { Users as UsersRaw } from '../../../models/server/raw';
@@ -34,7 +35,7 @@ export const _setStatusTextPromise = async function (userId: string, statusText:
 	return true;
 };
 
-export const _setStatusText = function (userId: any, statusText: string): unknown {
+export const _setStatusText = function (userId: any, statusText: string): IUser | boolean {
 	statusText = s.trim(statusText);
 	if (statusText.length > 120) {
 		statusText = statusText.substr(0, 120);