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) => { return a.name.localeCompare(b.name); });
  33         },
  34         groupList: function() {
  35             let maxGrp = 1;
  36             this.students.forEach( s => {
  37                 if (s.group > maxGrp)
  38                     maxGrp = s.group;
  39             });
  40             return _.range(1,maxGrp+1);
  41         },
  42         groupId: function(group, prefix) {
  43             return (prefix || "") + "group" + group;
  44         },
  45         getColor: function(number, qIdx) {
  46             // For the moment, green if correct and red if wrong; grey if unanswered yet
  47             // TODO: in-between color for partially right (especially for multi-questions)
  48             const paperIdx = this.assessment.papers.findIndex( item => { return item.number == number; });
  49             if (paperIdx === -1)
  50                 return "grey"; //student didn't start yet
  51             const inputIdx = this.assessment.papers[paperIdx].inputs.findIndex( item => {
  52                 const qNum = parseInt(item.index.split(".")[0]); //indexes separated by dots
  53                 return qIdx == qNum;
  54             });
  55             if (inputIdx === -1)
  56                 return "grey";
  57             if (_.isEqual(this.assessment.papers[paperIdx].inputs[inputIdx].input, this.assessment.questions[qIdx].answer))
  58                 return "green";
  59             return "red";
  60         },
  61         seeDetails: function(number, i) {
  62             // UNIMPLEMENTED: see question details, with current answer(s)
  63         },
  64         // stage 0 --> 1
  65         startMonitoring: function() {
  66             $.ajax("/start/monitoring", {
  67                 method: "GET",
  68                 data: {
  69                     password: Sha1.Compute(this.password),
  70                     aname: examName,
  71                     ccode: courseCode,
  72                     initials: initials,
  73                 },
  74                 dataType: "json",
  75                 success: s => {
  76                     if (!!s.errmsg)
  77                         return alert(s.errmsg);
  78                     this.assessment = s.assessment;
  79                     this.answers.inputs = s.assessment.questions.map( q => {
  80                         let input = _(q.options.length).times( _.constant(false) );
  81                         q.answer.forEach( idx => { input[idx] = true; });
  82                         return input;
  83                     });
  84                     this.students = s.students;
  85                     this.stage = 1;
  86                     socket = io.connect("/", {
  87                         query: "aid=" + this.assessment._id + "&secret=" + s.secret
  88                     });
  89                     socket.on(message.studentBlur, m => {
  90                         const sIdx = this.students.findIndex( item => { return item.number == m.number; });
  91                         Vue.set(this.students, sIdx, Object.assign({},this.students[sIdx],{blur: true}));
  92                         //this.students[sIdx].blur = true;
  93                     });
  94                     socket.on(message.studentFocus, m => {
  95                         const sIdx = this.students.findIndex( item => { return item.number == m.number; });
  96                         this.students[sIdx].blur = false;
  97                     });
  98                     socket.on(message.studentResize, m => {
  99                         const sIdx = this.students.findIndex( item => { return item.number == m.number; });
 100                         Vue.set(this.students, sIdx, Object.assign({},this.students[sIdx],{resize: true}));
 101                         //this.students[sIdx].resize = true;
 102                     });
 103                     socket.on(message.studentFullscreen, m => {
 104                         const sIdx = this.students.findIndex( item => { return item.number == m.number; });
 105                         this.students[sIdx].resize = false;
 106                     });
 107                     socket.on(message.studentDisconnect, m => {
 108                         const sIdx = this.students.findIndex( item => { return item.number == m.number; });
 109                         Vue.set(this.students, sIdx, Object.assign({},this.students[sIdx],{disco: true}));
 110                         //this.students[sIdx].disco = true;
 111                     });
 112                     socket.on(message.studentConnect, m => {
 113                         const sIdx = this.students.findIndex( item => { return item.number == m.number; });
 114                         this.students[sIdx].disco = false;
 115                     });
 116                     socket.on(message.newAnswer, m => {
 117                         let paperIdx = this.assessment.papers.findIndex( item => {
 118                             return item.number == m.number;
 119                         });
 120                         if (paperIdx === -1)
 121                         {
 122                             // First answer
 123                             paperIdx = this.assessment.papers.length;
 124                             this.assessment.papers.push({
 125                                 number: m.number,
 126                                 inputs: [ ], //other fields irrelevant here
 127                             });
 128                         }
 129                         // TODO: notations not coherent (input / answer... when, which ?)
 130                         this.assessment.papers[paperIdx].inputs.push(JSON.parse(m.answer)); //input+index
 131                     });
 132                 },
 133             });
 134         },
 135         endMonitoring: function() {
 136             // In the end, send answers to students
 137             // TODO: disable this button until everyone finished (need ability to mark absents)
 138             socket.emit(
 139                 message.allAnswers,
 140                 { answers: JSON.stringify(this.assessment.questions.map( q => { return q.answer; })) }
 141             );
 142         },
 143     },
 144 });