index.js

module.exports = function makeStuff(n, uid) {
  if (!uid) uid = 0;

  var results = {
    rooms: {},
    clients: {},
    users: {}
  }

  var room, client, user;
  for (var i = 0; i < n; i++) {

    room = {
      id: 'room_' + uid,
      ms: 'msid',
      clients: {}
    };

    // number of clients in the room
    var rnd = Math.random(),
      clients;
    if (rnd < 0.7) { // 75% just watching no multiscreen
      clients = 1
    } else if (rnd < 0.95) { // 20% 2 devices
      clients = 2;
    } else if (rnd < 0.99) { // 4% 3 devices
      clients = 3;
    } else if (rnd < 0.997) { // < 1% 4 or 5 devices
      clients = 4;
    } else {
      clients = 5;
    }


    user = false;
    for (var c = 0; c < clients; c++) {

      client = {
        id: 'client_' + uid + '_' + c
      }

      // connected user
      rnd = Math.random();

      if (user) {
        // have a logged in user > bigger chance to also be that user
        if (rnd < 0.5) {
          client.user = {
            __ref: ['users', user.id]
          };
          user.clients[client.id] = {
            __ref: ['clients', client.id]
          }
        }
      }
      if (!client.user) {
        if (clients >= 2) rnd *= 0.7; // bigger chance to be logged in when more clients
        if (rnd < 0.3) { // 30% base login rate
          user = {
            id: 'user_' + uid + '_' + c,
            content: {
              contentid: {
                position: 13242,
                liked: true,
                rated: 2.5,
                watched: false
              }
            },
            clients: {}
          };
          user.clients[client.id] = {
            __ref: ['clients', client.id]
          };

          results.users[user.id] = user;
          client.user = {
            __ref: ['users', user.id]
          };


        }
      }

      results.clients[client.id] = client;
      room.clients[client.id] = {
        __ref: ['clients', client.id]
      };

    }

    results.rooms[room.id] = room;

    uid++;


  }
  return results;

}

test.js

var makeStuff = require('./');

var stuff = makeStuff(1000);



var room, clients, client, users, user;
for (var r in stuff.rooms) {
  console.log('--------- room');
  room = stuff.rooms[r];
  users = 0;
  clients = 0;
  user = false
  for (var c in room.clients) {
    client = stuff.clients[room.clients[c].__ref[1]];
    clients++;

    if (client.user) {
      if (user && client.user.__ref[1] !== user.id) console.log('two different users in one room!', user.id);
      user = stuff.users[client.user.__ref[1]];
      console.log('client has user', user.id);
    }

    if (client.user && client.user.__ref[1] === 's') console.log('>>>>>>>', client.user)

  }
  console.log('total clients:', clients);


}