sockets.js

   1 const message = require("./public/javascripts/utils/socketMessages");
   2 const params = require("./config/parameters");
   3 const AssessmentEntity = require("./entities/assessment");
   4 const AssessmentModel = require("./models/assessment");
   5 const ObjectId = require("bson-objectid");
   6
   7 module.exports = function(io)
   8 {
   9     io.of("/").on("connection", socket => { //student or monitor connexion
  10         const aid = socket.handshake.query.aid;
  11         const isTeacher = !!socket.handshake.query.secret && socket.handshake.query.secret == params.secret;
  12
  13         if (isTeacher)
  14         {
  15             socket.join(aid + "_teacher");
  16             socket.on(message.allAnswers, m => { //send feedback to student (answers)
  17                 socket.broadcast.to(aid + "_student").emit(message.allAnswers, m);
  18             });
  19         }
  20         else //student
  21         {
  22             const number = socket.handshake.query.number;
  23             const password = socket.handshake.query.password;
  24             AssessmentModel.checkPassword(ObjectId(aid), number, password, (err,ret) => {
  25                 if (!!err || !ret)
  26                     return; //wrong password, or some unexpected error...
  27                 AssessmentModel.newConnection(ObjectId(aid), number);
  28                 socket.broadcast.to(aid + "_teacher").emit(message.studentConnect, {number: number});
  29                 socket.join(aid + "_student");
  30                 socket.on(message.newAnswer, m => { //got answer from student client
  31                     socket.broadcast.to(aid + "_teacher").emit(message.newAnswer, m);
  32                 });
  33                 socket.on("disconnect", () => { //notify monitor + server
  34                     AssessmentEntity.setDiscoTime(ObjectId(aid), number);
  35                     socket.broadcast.to(aid + "_teacher").emit(message.studentDisconnect, {number: number});
  36                 });
  37             });
  38         }
  39     });
  40 }