rooms.js

const log = require("debug")("signal:rooms")

let rooms = {}

function addProperty(obj, key, value, info = true) {
  if (key == null) return false
  let values = obj[key]
  if (values == null) {
    values = {}
    obj[key] = values
  }
  const created = values[value] == null
  values[value] = info
  return created
}

function removeProperty(obj, key, value) {
  let removed = false
  if (key != null) {
    let values = obj[key]
    if (values != null) {
      removed = values[value] != null
      delete values[value]
    }
  }
  return removed
}

function addSocketToRoom(sid, room) {
  log("addSocketToRoom", sid, room)
  return addProperty(rooms, room, sid)
}

function removeSocketFromRoom(sid, room) {
  log("removeSocketFromRoom", sid, room)
  return removeProperty(rooms, room, sid)
}

function allSocketsForRoom(room) {
  const sockets = Object.keys(rooms[room] || {})
  log("allSocketsForRoom", room, sockets)
  return sockets
}

module.exports = {
  rooms,
  addSocketToRoom,
  removeSocketFromRoom,
  allSocketsForRoom,
}