peertube-plugin-livechat/bots/lib/bot/handlers/demo.ts

import type { XMPPUser } from '../types'
import { logger } from '../../logger'
import { BotHandler } from './base'

export class BotHandlerDemo extends BotHandler {
  protected readonly lastHellos: Map<string, Date> = new Map()

  protected init (): void {
    const room = this.room
    room.on('room_join', (user: XMPPUser) => {
      if (user.isMe) {
        return
      }
      if (!room.isOnline()) {
        return
      }
      const lastHello = this.lastHellos.get(user.nick)
      const now = new Date()
      let msg: string
      if (lastHello) {
        logger.debug(`The user ${user.nick} was already seen at ${lastHello.toString()}`)
        if ((now.getTime() - lastHello.getTime()) < 3600 * 1000) { // no more than one hello per hour
          logger.info(`The user ${user.nick} was seen to recently, no message to send.`)
          return
        }
        logger.info(`The user ${user.nick} was seen a long time ago, sending a message.`)
        msg = `Hello ${user.nick}! Happy to see you again.`
      } else {
        logger.info(`The user ${user.nick} is here for the first time. Sending a message.`)
        msg = `Hello ${user.nick}! I'm the DemoBot, I'm here to demonstrate the chatroom.`
      }
      this.lastHellos.set(user.nick, now)
      room.sendGroupchat(msg).catch(() => {})
    })
  }
}