Prevent student from re-starting the same quiz, implement resuming logic (still buggish)

[qomet.git] / entities / assessment.js

diff --git a/entities/assessment.js b/entities/assessment.js
index 2104193..a8a781b 100644 (file)
--- a/entities/assessment.js
+++ b/entities/assessment.js
@@ -106,6 +106,25 @@ const AssessmentEntity =
                );
        },
 
+       getPaperByNumber: function(aid, number, callback)
+       {
+               db.assessments.findOne(
+                       {
+                               _id: aid,
+                               "papers.number": number,
+                       },
+                       (err,a) => {
+                               if (!!err || !a)
+                                       return callback(err,a);
+                               for (let p of a.papers)
+                               {
+                                       if (p.number == number)
+                                               return callback(null,p); //reached for sure
+                               }
+                       }
+               );
+       },
+
        startSession: function(aid, number, password, callback)
        {
                // TODO: security, do not re-do tasks if already done
@@ -123,6 +142,31 @@ const AssessmentEntity =
                );
        },
 
+
+       hasInput: function(aid, number, password, idx, cb)
+       {
+               db.assessments.findOne(
+                       {
+                               _id: aid,
+                               "papers.number": number,
+                               "papers.password": password,
+                       },
+                       (err,a) => {
+                               if (!!err || !a)
+                                       return cb(err,a);
+                               for (let p of a.papers)
+                               {
+                                       for (let i of p.inputs)
+                                       {
+                                               if (i.index == idx)
+                                                       return cb(null,true);
+                                       }
+                               }
+                               cb(null,false);
+                       }
+               );
+       },
+
        // https://stackoverflow.com/questions/27874469/mongodb-push-in-nested-array
        setInput: function(aid, number, password, input, callback) //input: index + arrayOfInt (or txt)
        {