zhao/imports/api/methods/newGame.js

import { Meteor } from "meteor/meteor";
import { Random } from "meteor/random";
import { check } from "meteor/check";
import Rooms from "../collections/Rooms.js";
import Players from "../collections/Players.js";

Meteor.methods({
  "newGame": async ({ name }) => {
    check(name, String);
    let roomId = null;
    let state = "waitingRoom";

    // attempt to get a valid room code 10 times
    let remainingAttempts = 10;
    let joinCode;
    while (roomId === null && remainingAttempts > 0) {
      joinCode = Random.hexString(6);
      let started = new Date();

      try {
        let result = Rooms.insert({ joinCode, started, state });
        roomId = result;
        break;
      } catch (e) {
        // BulkWriteError
        if (e.code === 11000) {
          remainingAttempts -= 1;
        }
      }
    }

    let playerId = Players.insert({ roomId, name });

    if (remainingAttempts == 0 && roomId === null) {
      return "failed";
    }

    return { playerId, roomId, joinCode };
  },
});