overleaf/services/web/app/src/Features/Chat/ChatController.js

const { expressify } = require('@overleaf/promise-utils')
const ChatApiHandler = require('./ChatApiHandler')
const EditorRealTimeController = require('../Editor/EditorRealTimeController')
const SessionManager = require('../Authentication/SessionManager')
const UserInfoManager = require('../User/UserInfoManager')
const UserInfoController = require('../User/UserInfoController')
const ChatManager = require('./ChatManager')

async function sendMessage(req, res) {
  const { project_id: projectId } = req.params
  const { content, client_id: clientId } = req.body
  const userId = SessionManager.getLoggedInUserId(req.session)
  if (userId == null) {
    throw new Error('no logged-in user')
  }

  const message = await ChatApiHandler.promises.sendGlobalMessage(
    projectId,
    userId,
    content
  )

  const user = await UserInfoManager.promises.getPersonalInfo(message.user_id)
  message.user = UserInfoController.formatPersonalInfo(user)
  message.clientId = clientId
  EditorRealTimeController.emitToRoom(projectId, 'new-chat-message', message)
  res.sendStatus(204)
}

async function getMessages(req, res) {
  const { project_id: projectId } = req.params
  const { query } = req
  const messages = await ChatApiHandler.promises.getGlobalMessages(
    projectId,
    query.limit,
    query.before
  )

  await ChatManager.promises.injectUserInfoIntoThreads({ global: { messages } })
  res.json(messages)
}

module.exports = {
  sendMessage: expressify(sendMessage),
  getMessages: expressify(getMessages),
}