models/course.js

   1 const CourseEntity = require("../entities/course");
   2 const UserEntity = require("../entities/user");
   3 const AssessmentEntity = require("../entities/assessment");
   4
   5 const CourseModel =
   6 {
   7     getByInitials: function(initials, callback)
   8     {
   9         UserEntity.getByInitials(initials, (err,user) => {
  10             if (!!err || !user)
  11                 callback(err, []);
  12             else
  13             {
  14                 CourseEntity.getByUser(user._id, (err2,courseArray) => {
  15                     callback(err2, courseArray);
  16                 });
  17             }
  18         });
  19     },
  20
  21     getByRefs: function(initials, code, callback)
  22     {
  23         UserEntity.getByInitials(initials, (err,user) => {
  24             if (!!err || !user)
  25                 callback(err, []);
  26             else
  27             {
  28                 CourseEntity.getByPath(user._id, code, (err2,course) => {
  29                     callback(err2, course);
  30                 });
  31             }
  32         });
  33     },
  34
  35     importStudents: function(uid, cid, students, cb)
  36     {
  37         // 1) check if uid == course uid
  38         CourseEntity.getById(cid, (err,course) => {
  39             if (!!err || !course || !course.uid.equals(uid))
  40                 return cb({errmsg:"Not your course"},{});
  41             // 2) Set students
  42             CourseEntity.setStudents(cid, students, cb);
  43         });
  44     },
  45
  46     setPassword: function(uid, cid, pwd, cb)
  47     {
  48         // 1) check if uid == course uid
  49         CourseEntity.getById(cid, (err,course) => {
  50             if (!!err || !course || !course.uid.equals(uid))
  51                 return cb({errmsg:"Not your course"},{});
  52             // 2) Insert new student (overwrite if number already exists)
  53             CourseEntity.setPassword(cid, pwd, cb);
  54         });
  55     },
  56
  57     remove: function(uid, cid, cb)
  58     {
  59         // 1) check if uid == course uid
  60         CourseEntity.getById(cid, (err,course) => {
  61             if (!!err || !course || !course.uid.equals(uid))
  62                 return cb({errmsg:"Not your course"},{});
  63             // 2) remove all associated assessments
  64             AssessmentEntity.removeGroup(cid, (err2,ret) => {
  65                 if (!!err)
  66                     return cb(err,{});
  67                 // 3) remove course (with its students)
  68                 CourseEntity.remove(cid, cb);
  69             });
  70         });
  71     },
  72 }
  73
  74 module.exports = CourseModel;