Commit | Line | Data |
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43828378 BA |
1 | const CourseModel = require("../models/course"); |
2 | const UserModel = require("../models/user"); | |
e99c53fb | 3 | const ObjectId = require("bson-objectid"); |
e99c53fb | 4 | const TokenGen = require("../utils/tokenGenerator"); |
43828378 | 5 | const db = require("../utils/database"); |
e99c53fb BA |
6 | |
7 | const AssessmentModel = | |
8 | { | |
43828378 BA |
9 | /* |
10 | * Structure: | |
11 | * _id: BSON id | |
12 | * cid: course ID | |
13 | * name: varchar | |
a80c6a3b BA |
14 | * active: boolean |
15 | * mode: secure | watch | exam | open (decreasing security) | |
43828378 BA |
16 | * fixed: bool (questions in fixed order; default: false) |
17 | * display: "one" or "all" (generally "all" for open questions, but...) | |
a80c6a3b | 18 | * time: 0, global (one vaue) or per question (array of integers) |
43828378 BA |
19 | * introduction: "", |
20 | * coefficient: number, default 1 | |
21 | * questions: array of | |
22 | * index: for paper test, like 2.1.a (?!); and quiz: 0, 1, 2, 3... | |
23 | * wording: varchar (HTML) | |
24 | * options: array of varchar --> if present, question type == quiz! | |
25 | * fixed: bool, options in fixed order (default: false) | |
26 | * answer: array of integers (for quiz) or html text (for paper); striped in exam mode | |
27 | * active: boolean, is question in current assessment? | |
28 | * points: points for this question (default 1) | |
43828378 BA |
29 | * papers : array of |
30 | * number: student number | |
31 | * inputs: array of {index,answer[array of integers or html text],startTime} | |
32 | * current: index of current question (if relevant: display="one") | |
33 | * startTime | |
34 | * discoTime, totalDisco: last disconnect timestamp (if relevant) + total time | |
35 | * discoCount: number of disconnections | |
36 | * password: random string identifying student for exam session TEMPORARY | |
37 | */ | |
38 | ||
39 | ////////////////// | |
40 | // BASIC FUNCTIONS | |
41 | ||
42 | getById: function(aid, callback) | |
43 | { | |
44 | db.assessments.findOne( | |
45 | { _id: aid }, | |
46 | callback | |
47 | ); | |
48 | }, | |
49 | ||
50 | getByPath: function(cid, name, callback) | |
51 | { | |
52 | db.assessments.findOne( | |
53 | { | |
54 | cid: cid, | |
55 | name: name, | |
56 | }, | |
57 | callback | |
58 | ); | |
59 | }, | |
60 | ||
61 | insert: function(cid, name, callback) | |
62 | { | |
63 | db.assessments.insert( | |
64 | { | |
65 | name: name, | |
66 | cid: cid, | |
67 | active: false, | |
68 | mode: "exam", | |
69 | fixed: false, | |
70 | display: "one", | |
71 | time: 0, | |
72 | introduction: "", | |
73 | coefficient: 1, | |
74 | questions: [ ], | |
75 | papers: [ ], | |
76 | }, | |
77 | callback | |
78 | ); | |
79 | }, | |
80 | ||
81 | getByCourse: function(cid, callback) | |
82 | { | |
83 | db.assessments.find( | |
84 | { cid: cid }, | |
85 | callback | |
86 | ); | |
87 | }, | |
88 | ||
89 | // arg: full assessment without _id field | |
90 | replace: function(aid, assessment, cb) | |
91 | { | |
92 | // Should be: (but unsupported by mongojs) | |
93 | // db.assessments.replaceOne( | |
94 | // { _id: aid }, | |
95 | // assessment, | |
96 | // cb | |
97 | // ); | |
98 | // Temporary workaround: | |
99 | db.assessments.update( | |
100 | { _id: aid }, | |
101 | { $set: assessment }, | |
102 | cb | |
103 | ); | |
104 | }, | |
105 | ||
106 | getQuestions: function(aid, callback) | |
107 | { | |
108 | db.assessments.findOne( | |
109 | { | |
110 | _id: aid, | |
111 | display: "all", | |
112 | }, | |
113 | { questions: 1}, | |
114 | (err,res) => { | |
115 | callback(err, !!res ? res.questions : null); | |
116 | } | |
117 | ); | |
118 | }, | |
119 | ||
120 | getQuestion: function(aid, index, callback) | |
121 | { | |
122 | db.assessments.findOne( | |
123 | { | |
124 | _id: aid, | |
125 | display: "one", | |
126 | }, | |
127 | { questions: 1}, | |
128 | (err,res) => { | |
129 | if (!!err || !res) | |
130 | return callback(err, res); | |
131 | const qIdx = res.questions.findIndex( item => { return item.index == index; }); | |
132 | if (qIdx === -1) | |
133 | return callback({errmsg: "Question not found"}, null); | |
134 | callback(null, res.questions[qIdx]); | |
135 | } | |
136 | ); | |
137 | }, | |
138 | ||
139 | getPaperByNumber: function(aid, number, callback) | |
140 | { | |
141 | db.assessments.findOne( | |
142 | { | |
143 | _id: aid, | |
144 | "papers.number": number, | |
145 | }, | |
146 | (err,a) => { | |
147 | if (!!err || !a) | |
148 | return callback(err,a); | |
149 | for (let p of a.papers) | |
150 | { | |
151 | if (p.number == number) | |
152 | return callback(null,p); //reached for sure | |
153 | } | |
154 | } | |
155 | ); | |
156 | }, | |
157 | ||
158 | // NOTE: no callbacks for 2 next functions, failures are not so important | |
159 | // (because monitored: teachers can see what's going on) | |
160 | ||
161 | addDisco: function(aid, number, deltaTime) | |
162 | { | |
163 | db.assessments.update( | |
164 | { | |
165 | _id: aid, | |
166 | "papers.number": number, | |
167 | }, | |
168 | { $inc: { | |
169 | "papers.$.discoCount": 1, | |
170 | "papers.$.totalDisco": deltaTime, | |
171 | } }, | |
172 | { $set: { "papers.$.discoTime": null } } | |
173 | ); | |
174 | }, | |
175 | ||
176 | setDiscoTime: function(aid, number) | |
177 | { | |
178 | db.assessments.update( | |
179 | { | |
180 | _id: aid, | |
181 | "papers.number": number, | |
182 | }, | |
183 | { $set: { "papers.$.discoTime": Date.now() } } | |
184 | ); | |
185 | }, | |
186 | ||
187 | getDiscoTime: function(aid, number, cb) | |
188 | { | |
189 | db.assessments.findOne( | |
190 | { _id: aid }, | |
191 | (err,a) => { | |
192 | if (!!err) | |
193 | return cb(err, null); | |
194 | const idx = a.papers.findIndex( item => { return item.number == number; }); | |
195 | cb(null, a.papers[idx].discoTime); | |
196 | } | |
197 | ); | |
198 | }, | |
199 | ||
200 | hasInput: function(aid, number, password, idx, cb) | |
201 | { | |
202 | db.assessments.findOne( | |
203 | { | |
204 | _id: aid, | |
205 | "papers.number": number, | |
206 | "papers.password": password, | |
207 | }, | |
208 | (err,a) => { | |
209 | if (!!err || !a) | |
210 | return cb(err,a); | |
211 | let papIdx = a.papers.findIndex( item => { return item.number == number; }); | |
212 | for (let i of a.papers[papIdx].inputs) | |
213 | { | |
214 | if (i.index == idx) | |
215 | return cb(null,true); | |
216 | } | |
217 | cb(null,false); | |
218 | } | |
219 | ); | |
220 | }, | |
221 | ||
222 | // https://stackoverflow.com/questions/27874469/mongodb-push-in-nested-array | |
223 | setInput: function(aid, number, password, input, callback) //input: index + arrayOfInt (or txt) | |
224 | { | |
225 | db.assessments.update( | |
226 | { | |
227 | _id: aid, | |
228 | "papers.number": number, | |
229 | "papers.password": password, | |
230 | }, | |
231 | { $push: { "papers.$.inputs": input } }, | |
232 | callback | |
233 | ); | |
234 | }, | |
235 | ||
236 | endAssessment: function(aid, number, password, callback) | |
237 | { | |
238 | db.assessments.update( | |
239 | { | |
240 | _id: aid, | |
241 | "papers.number": number, | |
242 | "papers.password": password, | |
243 | }, | |
244 | { $set: { | |
245 | "papers.$.endTime": Date.now(), | |
246 | "papers.$.password": "", | |
247 | } }, | |
248 | callback | |
249 | ); | |
250 | }, | |
251 | ||
252 | remove: function(aid, cb) | |
253 | { | |
254 | db.assessments.remove( | |
255 | { _id: aid }, | |
256 | cb | |
257 | ); | |
258 | }, | |
259 | ||
260 | removeGroup: function(cid, cb) | |
261 | { | |
262 | db.assessments.remove( | |
263 | { cid: cid }, | |
264 | cb | |
265 | ); | |
266 | }, | |
267 | ||
268 | ///////////////////// | |
269 | // ADVANCED FUNCTIONS | |
270 | ||
e99c53fb BA |
271 | getByRefs: function(initials, code, name, cb) |
272 | { | |
43828378 | 273 | UserModel.getByInitials(initials, (err,user) => { |
e99c53fb BA |
274 | if (!!err || !user) |
275 | return cb(err || {errmsg: "User not found"}); | |
43828378 | 276 | CourseModel.getByPath(user._id, code, (err2,course) => { |
e99c53fb BA |
277 | if (!!err2 || !course) |
278 | return cb(err2 || {errmsg: "Course not found"}); | |
43828378 | 279 | AssessmentModel.getByPath(course._id, name, (err3,assessment) => { |
e99c53fb BA |
280 | if (!!err3 || !assessment) |
281 | return cb(err3 || {errmsg: "Assessment not found"}); | |
282 | cb(null,assessment); | |
283 | }); | |
284 | }); | |
285 | }); | |
286 | }, | |
287 | ||
71d1ca9c BA |
288 | checkPassword: function(aid, number, password, cb) |
289 | { | |
43828378 | 290 | AssessmentModel.getById(aid, (err,assessment) => { |
71d1ca9c BA |
291 | if (!!err || !assessment) |
292 | return cb(err, assessment); | |
293 | const paperIdx = assessment.papers.findIndex( item => { return item.number == number; }); | |
294 | if (paperIdx === -1) | |
295 | return cb({errmsg: "Paper not found"}, false); | |
296 | cb(null, assessment.papers[paperIdx].password == password); | |
297 | }); | |
298 | }, | |
299 | ||
e99c53fb BA |
300 | add: function(uid, cid, name, cb) |
301 | { | |
302 | // 1) Check that course is owned by user of ID uid | |
43828378 | 303 | CourseModel.getById(cid, (err,course) => { |
e99c53fb BA |
304 | if (!!err || !course) |
305 | return cb({errmsg: "Course retrieval failure"}); | |
306 | if (!course.uid.equals(uid)) | |
307 | return cb({errmsg:"Not your course"},undefined); | |
308 | // 2) Insert new blank assessment | |
43828378 | 309 | AssessmentModel.insert(cid, name, cb); |
e99c53fb BA |
310 | }); |
311 | }, | |
312 | ||
313 | update: function(uid, assessment, cb) | |
314 | { | |
71d1ca9c | 315 | const aid = ObjectId(assessment._id); |
e99c53fb | 316 | // 1) Check that assessment is owned by user of ID uid |
43828378 | 317 | AssessmentModel.getById(aid, (err,assessmentOld) => { |
e99c53fb BA |
318 | if (!!err || !assessmentOld) |
319 | return cb({errmsg: "Assessment retrieval failure"}); | |
43828378 | 320 | CourseModel.getById(ObjectId(assessmentOld.cid), (err2,course) => { |
e99c53fb BA |
321 | if (!!err2 || !course) |
322 | return cb({errmsg: "Course retrieval failure"}); | |
323 | if (!course.uid.equals(uid)) | |
324 | return cb({errmsg:"Not your course"},undefined); | |
325 | // 2) Replace assessment | |
326 | delete assessment["_id"]; | |
327 | assessment.cid = ObjectId(assessment.cid); | |
43828378 | 328 | AssessmentModel.replace(aid, assessment, cb); |
e99c53fb BA |
329 | }); |
330 | }); | |
331 | }, | |
332 | ||
333 | // Set password in responses collection | |
f03a2ad9 | 334 | startSession: function(aid, number, password, cb) |
e99c53fb | 335 | { |
43828378 | 336 | AssessmentModel.getPaperByNumber(aid, number, (err,paper) => { |
f03a2ad9 BA |
337 | if (!!err) |
338 | return cb(err,null); | |
71d1ca9c BA |
339 | if (!paper && !!password) |
340 | return cb({errmsg: "Cannot start a new exam before finishing current"},null); | |
f03a2ad9 BA |
341 | if (!!paper) |
342 | { | |
343 | if (!password) | |
71d1ca9c | 344 | return cb({errmsg: "Missing password"}); |
f03a2ad9 | 345 | if (paper.password != password) |
71d1ca9c | 346 | return cb({errmsg: "Wrong password"}); |
f03a2ad9 | 347 | } |
43828378 BA |
348 | AssessmentModel.getQuestions(aid, (err2,questions) => { |
349 | if (!!err2) | |
350 | return cb(err2,null); | |
f03a2ad9 | 351 | if (!!paper) |
43828378 | 352 | return cb(null,{paper:paper}); |
2c545c26 | 353 | const pwd = TokenGen.generate(12); //arbitrary number, 12 seems enough... |
43828378 BA |
354 | db.assessments.update( |
355 | { _id: aid }, | |
356 | { $push: { papers: { | |
357 | number: number, | |
358 | startTime: Date.now(), | |
359 | endTime: undefined, | |
360 | password: password, | |
361 | totalDisco: 0, | |
362 | discoCount: 0, | |
363 | inputs: [ ], //TODO: this is stage 1, stack indexed answers. | |
364 | // then build JSON tree for easier access / correct | |
365 | }}}, | |
366 | (err3,ret) => { cb(err3,{password:password}); } | |
367 | ); | |
e99c53fb BA |
368 | }); |
369 | }); | |
370 | }, | |
371 | ||
f03a2ad9 BA |
372 | newAnswer: function(aid, number, password, input, cb) |
373 | { | |
f03a2ad9 | 374 | // Check that student hasn't already answered |
43828378 | 375 | AssessmentModel.hasInput(aid, number, password, input.index, (err,ret) => { |
f03a2ad9 BA |
376 | if (!!err) |
377 | return cb(err,null); | |
378 | if (!!ret) | |
379 | return cb({errmsg:"Question already answered"},null); | |
43828378 | 380 | AssessmentModel.setInput(aid, number, password, input, (err2,ret2) => { |
f03a2ad9 BA |
381 | if (!!err2 || !ret2) |
382 | return cb(err2,ret2); | |
383 | return cb(null,ret2); | |
384 | }); | |
385 | }); | |
386 | }, | |
387 | ||
43828378 | 388 | // NOTE: no callbacks for next function, failures are not so important |
29c8b391 | 389 | // (because monitored: teachers can see what's going on) |
29c8b391 BA |
390 | newConnection: function(aid, number) |
391 | { | |
392 | //increment discoCount, reset discoTime to NULL, update totalDisco | |
43828378 | 393 | AssessmentModel.getDiscoTime(aid, number, (err,discoTime) => { |
29c8b391 | 394 | if (!!discoTime) |
43828378 | 395 | AssessmentModel.addDisco(aid, number, Date.now() - discoTime); |
29c8b391 BA |
396 | }); |
397 | }, | |
43828378 | 398 | } |
e99c53fb BA |
399 | |
400 | module.exports = AssessmentModel; |