zhao/imports/api/methods/joinGame.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({
  "joinGame": async ({ code, name }) => {
    check(code, String);
    check(name, String);
    name = name.trim();

    let room = Rooms.findOne({ joinCode: code.toLowerCase() });
    if (room === undefined) {
      throw new Meteor.Error("room-not-found");
    }

    if (room.state !== "waitingRoom") {
      throw new Meteor.Error("room-already-playing");
    }

    let roomId = room._id;
    if (roomId === undefined) {
      throw new Meteor.Error("room-id-undefined");
    }

    let level = 2;
    let playerId;
    try {
      playerId = Players.insert({ roomId, name, level });
    } catch (e) {
      if (e.code === 11000) {
        throw new Meteor.Error("name-collision");
      }
    }

    let joinCode = room.joinCode;
    return { joinCode, playerId, roomId };
  }
});