sockets.js

   1 const message = require("./public/javascripts/utils/socketMessages");
   2 const params = require("./config/parameters");
   3 const AssessmentModel = require("./models/assessment");
   4 const ObjectId = require("bson-objectid");
   5
   6 module.exports = function(io)
   7 {
   8     io.of("/").on("connection", socket => { //student or monitor connexion
   9         const aid = socket.handshake.query.aid;
  10         const isTeacher = !!socket.handshake.query.secret && socket.handshake.query.secret == params.secret;
  11
  12         if (isTeacher)
  13         {
  14             socket.join(aid + "_teacher");
  15             socket.on(message.allAnswers, m => { //send feedback to student (answers)
  16                 socket.broadcast.to(aid + "_student").emit(message.allAnswers, m);
  17             });
  18         }
  19         else //student
  20         {
  21             const number = socket.handshake.query.number;
  22             const password = socket.handshake.query.password;
  23             AssessmentModel.checkPassword(ObjectId(aid), number, password, (err,ret) => {
  24                 if (!!err || !ret)
  25                     return; //wrong password, or some unexpected error...
  26                 AssessmentModel.newConnection(ObjectId(aid), number);
  27                 socket.broadcast.to(aid + "_teacher").emit(message.studentConnect, {number: number});
  28                 socket.join(aid + "_student");
  29                 socket.on(message.newAnswer, m => { //got answer from student client
  30                     socket.broadcast.to(aid + "_teacher").emit(message.newAnswer, m);
  31                 });
  32                 socket.on(message.studentBlur, m => {
  33                     socket.broadcast.to(aid + "_teacher").emit(message.studentBlur, m);
  34                 });
  35                 socket.on(message.studentFocus, m => {
  36                     socket.broadcast.to(aid + "_teacher").emit(message.studentFocus, m);
  37                 });
  38                 socket.on(message.studentResize, m => {
  39                     socket.broadcast.to(aid + "_teacher").emit(message.studentResize, m);
  40                 });
  41                 socket.on(message.studentFullscreen, m => {
  42                     socket.broadcast.to(aid + "_teacher").emit(message.studentFullscreen, m);
  43                 });
  44                 socket.on("disconnect", () => { //notify monitor + server
  45                     AssessmentModel.setDiscoTime(ObjectId(aid), number);
  46                     socket.broadcast.to(aid + "_teacher").emit(message.studentDisconnect, {number: number});
  47                 });
  48             });
  49         }
  50     });
  51 }