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         togglePresence: function(s) {
  46             s.present = !s.present;
  47         },
  48         allFinished: function() {
  49             for (s of this.students)
  50             {
  51                 if (!s.present)
  52                     continue;
  53                 const paperIdx = this.assessment.papers.findIndex( item => { return item.number == number; });
  54                 if (paperIdx === -1)
  55                     return false;
  56                 const paper = this.assessment.papers[paperIdx];
  57                 if (paper.inputs.length < this.assessment.questions.length)
  58                     return false;
  59             }
  60             return true;
  61         },
  62         getColor: function(number, qIdx) {
  63             // For the moment, green if correct and red if wrong; grey if unanswered yet
  64             // TODO: in-between color for partially right (especially for multi-questions)
  65             const paperIdx = this.assessment.papers.findIndex( item => { return item.number == number; });
  66             if (paperIdx === -1)
  67                 return "grey"; //student didn't start yet
  68             const inputIdx = this.assessment.papers[paperIdx].inputs.findIndex( item => {
  69                 const qNum = parseInt(item.index.split(".")[0]); //indexes separated by dots
  70                 return qIdx == qNum;
  71             });
  72             if (inputIdx === -1)
  73                 return "grey";
  74             if (_.isEqual(this.assessment.papers[paperIdx].inputs[inputIdx].input, this.assessment.questions[qIdx].answer))
  75                 return "green";
  76             return "red";
  77         },
  78         seeDetails: function(number, i) {
  79             // UNIMPLEMENTED: see question details, with current answer(s)
  80         },
  81         // stage 0 --> 1
  82         startMonitoring: function() {
  83             $.ajax("/start/monitoring", {
  84                 method: "GET",
  85                 data: {
  86                     password: Sha1.Compute(this.password),
  87                     aname: examName,
  88                     ccode: courseCode,
  89                     initials: initials,
  90                 },
  91                 dataType: "json",
  92                 success: s => {
  93                     if (!!s.errmsg)
  94                         return alert(s.errmsg);
  95                     this.assessment = s.assessment;
  96                     this.answers.inputs = s.assessment.questions.map( q => {
  97                         let input = _(q.options.length).times( _.constant(false) );
  98                         q.answer.forEach( idx => { input[idx] = true; });
  99                         return input;
 100                     });
 101                     this.students = s.students;
 102                     this.students.forEach( s => { s.present = true; }); //a priori...
 103                     this.stage = 1;
 104                     socket = io.connect("/", {
 105                         query: "aid=" + this.assessment._id + "&secret=" + s.secret
 106                     });
 107                     socket.on(message.studentBlur, m => {
 108                         const sIdx = this.students.findIndex( item => { return item.number == m.number; });
 109                         Vue.set(this.students, sIdx, Object.assign({},this.students[sIdx],{blur: true}));
 110                         //this.students[sIdx].blur = true;
 111                     });
 112                     socket.on(message.studentFocus, m => {
 113                         const sIdx = this.students.findIndex( item => { return item.number == m.number; });
 114                         this.students[sIdx].blur = false;
 115                     });
 116                     socket.on(message.studentResize, m => {
 117                         const sIdx = this.students.findIndex( item => { return item.number == m.number; });
 118                         Vue.set(this.students, sIdx, Object.assign({},this.students[sIdx],{resize: true}));
 119                         //this.students[sIdx].resize = true;
 120                     });
 121                     socket.on(message.studentFullscreen, m => {
 122                         const sIdx = this.students.findIndex( item => { return item.number == m.number; });
 123                         this.students[sIdx].resize = false;
 124                     });
 125                     socket.on(message.studentDisconnect, m => {
 126                         const sIdx = this.students.findIndex( item => { return item.number == m.number; });
 127                         Vue.set(this.students, sIdx, Object.assign({},this.students[sIdx],{disco: true}));
 128                         //this.students[sIdx].disco = true;
 129                     });
 130                     socket.on(message.studentConnect, m => {
 131                         const sIdx = this.students.findIndex( item => { return item.number == m.number; });
 132                         this.students[sIdx].disco = false;
 133                     });
 134                     socket.on(message.newAnswer, m => {
 135                         let paperIdx = this.assessment.papers.findIndex( item => {
 136                             return item.number == m.number;
 137                         });
 138                         if (paperIdx === -1)
 139                         {
 140                             // First answer
 141                             paperIdx = this.assessment.papers.length;
 142                             this.assessment.papers.push({
 143                                 number: m.number,
 144                                 inputs: [ ], //other fields irrelevant here
 145                             });
 146                         }
 147                         // TODO: notations not coherent (input / answer... when, which ?)
 148                         this.assessment.papers[paperIdx].inputs.push(JSON.parse(m.answer)); //input+index
 149                     });
 150                 },
 151             });
 152         },
 153         endMonitoring: function() {
 154             // In the end, send answers to students
 155             // TODO: disable this button until everyone finished (need ability to mark absents)
 156             socket.emit(
 157                 message.allAnswers,
 158                 { answers: JSON.stringify(this.assessment.questions.map( q => { return q.answer; })) }
 159             );
 160         },
 161     },
 162 });