misskey/packages/backend/src/server/api/endpoints/get-online-users-count.ts

import { MoreThan } from 'typeorm';
import { Inject, Injectable } from '@nestjs/common';
import { USER_ONLINE_THRESHOLD } from '@/const.js';
import type { UsersRepository } from '@/models/index.js';
import { Endpoint } from '@/server/api/endpoint-base.js';
import { DI } from '@/di-symbols.js';

export const meta = {
	tags: ['meta'],

	requireCredential: false,
} as const;

export const paramDef = {
	type: 'object',
	properties: {},
	required: [],
} as const;

// eslint-disable-next-line import/no-default-export
@Injectable()
export default class extends Endpoint<typeof meta, typeof paramDef> {
	constructor(
		@Inject(DI.usersRepository)
		private usersRepository: UsersRepository,
	) {
		super(meta, paramDef, async () => {
			const count = await this.usersRepository.countBy({
				lastActiveDate: MoreThan(new Date(Date.now() - USER_ONLINE_THRESHOLD)),
			});

			return {
				count,
			};
		});
	}
}