public/javascripts/monitor.js

   1 let socket = null; //monitor answers in real time
   2
   3 new Vue({
   4     el: "#monitor",
   5     data: {
   6         password: "", //from password field
   7         assessment: { }, //obtained after authentication
   8         // Stage 0: unauthenticated (password),
   9         //       1: authenticated (password hash validated), start monitoring
  10         stage: 0,
  11         answers: {
  12             displayAll: true,
  13             showSolution: true, //TODO: allow to hide, to let teachers search too
  14             inputs: [ ],
  15             index : -1,
  16         },
  17         students: [ ], //to know their names
  18         display: "assessment", //or student's answers
  19     },
  20     methods: {
  21         // TODO: redundant code, next 4 funcs already exist in course.js
  22         toggleDisplay: function(area) {
  23             if (this.display == area)
  24                 this.display = "";
  25             else
  26                 this.display = area;
  27         },
  28         studentList: function(group) {
  29             return this.students
  30                 .filter( s => { return group==0 || s.group == group; })
  31                 .map( s => { return Object.assign({}, s); }) //not altering initial array
  32                 .sort( (a,b) => {
  33                     let res = a.name.localeCompare(b.name);
  34                     if (res == 0)
  35                         res += a.forename.localeCompare(b.forename);
  36                     return res;
  37                 });
  38         },
  39         groupList: function() {
  40             let maxGrp = 1;
  41             this.students.forEach( s => {
  42                 if (s.group > maxGrp)
  43                     maxGrp = s.group;
  44             });
  45             return _.range(1,maxGrp+1);
  46         },
  47         groupId: function(group, prefix) {
  48             return (prefix || "") + "group" + group;
  49         },
  50         getColor: function(number, qIdx) {
  51             // For the moment, green if correct and red if wrong; grey if unanswered yet
  52             // TODO: in-between color for partially right (especially for multi-questions)
  53             const paperIdx = this.assessment.papers.findIndex( item => { return item.number == number; });
  54             if (paperIdx === -1)
  55                 return "grey"; //student didn't start yet
  56             const inputIdx = this.assessment.papers[paperIdx].inputs.findIndex( item => {
  57                 const qNum = parseInt(item.index.split(".")[0]); //indexes separated by dots
  58                 return qIdx == qNum;
  59             });
  60             if (inputIdx === -1)
  61                 return "grey";
  62             if (_.isEqual(this.assessment.papers[paperIdx].inputs[inputIdx].input, this.assessment.questions[qIdx].answer))
  63                 return "green";
  64             return "red";
  65         },
  66         seeDetails: function(number, i) {
  67             // UNIMPLEMENTED: see question details, with current answer(s)
  68         },
  69         // stage 0 --> 1
  70         startMonitoring: function() {
  71             $.ajax("/start/monitoring", {
  72                 method: "GET",
  73                 data: {
  74                     password: Sha1.Compute(this.password),
  75                     aname: examName,
  76                     ccode: courseCode,
  77                     initials: initials,
  78                 },
  79                 dataType: "json",
  80                 success: s => {
  81                     if (!!s.errmsg)
  82                         return alert(s.errmsg);
  83                     this.assessment = s.assessment;
  84                     this.answers.inputs = s.assessment.questions.map( q => { return q.answer; });
  85                     this.students = s.students;
  86                     this.stage = 1;
  87                     socket = io.connect("/", {
  88                         query: "aid=" + this.assessment._id + "&secret=" + s.secret
  89                     });
  90                     socket.on(message.newAnswer, m => {
  91                         let paperIdx = this.assessment.papers.findIndex( item => {
  92                             return item.number == m.number;
  93                         });
  94                         if (paperIdx === -1)
  95                         {
  96                             // First answer
  97                             paperIdx = this.assessment.papers.length;
  98                             this.assessment.papers.push({
  99                                 number: m.number,
 100                                 inputs: [ ], //other fields irrelevant here
 101                             });
 102                         }
 103                         // TODO: notations not coherent (input / answer... when, which ?)
 104                         this.assessment.papers[paperIdx].inputs.push(m.answer); //input+index
 105                     });
 106                 },
 107             });
 108         },
 109         endMonitoring: function() {
 110             // In the end, send answers to students
 111             socket.emit(
 112                 message.allAnswers,
 113                 { answers: this.assessment.questions.map( q => { return q.answer; }) }
 114             );
 115         },
 116     },
 117 });