forked from moodle/moodle
-
Notifications
You must be signed in to change notification settings - Fork 0
/
backuplib.php
835 lines (718 loc) · 38.4 KB
/
backuplib.php
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
<?php //$Id$
//This php script contains all the stuff to backup/restore
//quiz mods
//To see, put your terminal to 160cc
//This is the "graphical" structure of the quiz mod:
//
// quiz quiz_categories
// (CL,pk->id) (CL,pk->id)
// | |
// ----------------------------------------------- |
// | | | |.......................................
// | | | | .
// | | | | .
// quiz_attempts quiz_grades quiz_question_grades | ----quiz_question_datasets---- .
// (UL,pk->id, fk->quiz) (UL,pk->id,fk->quiz) (CL,pk->id,fk->quiz) | | (CL,pk->id,fk->question, | .
// | | | | fk->dataset_definition) | .
// | | | | | .
// | | | | | .
// | | | | | .
// quiz_responses | quiz_questions quiz_dataset_definitions
// (UL,pk->id, fk->attempt)----------------------------------------------------(CL,pk->id,fk->category,files) (CL,pk->id,fk->category)
// | |
// | |
// | |
// | quiz_dataset_items
// | (CL,pk->id,fk->definition)
// |
// |
// |
// --------------------------------------------------------------------------------------------------------------
// | | | | | | |
// | | | | | | |
// | | | | quiz_calculated | | quiz_randomsamatch
// quiz_truefalse | quiz_multichoice | (CL,pl->id,fk->question) | |--(CL,pl->id,fk->question)
// (CL,pl->id,fk->question) | (CL,pl->id,fk->question) | . | |
// . | . | . | |
// . quiz_shortanswer . quiz_numerical . quiz_multianswer. |
// . (CL,pl->id,fk->question) . (CL,pl->id,fk->question) . (CL,pl->id,fk->question) | quiz_match
// . . . . . . |--(CL,pl->id,fk->question)
// . . . . . . | .
// . . . . . . | .
// . . . . . . | .
// . . . . . . | quiz_match_sub
// . . . . . . |--(CL,pl->id,fk->question)
// ........................................................................................ |
// . |
// . |
// . | quiz_numerical_units
// quiz_answers |--(CL,pl->id,fk->question)
// (CL,pk->id,fk->question)----------------------------------------------------------
//
// Meaning: pk->primary key field of the table
// fk->foreign key to link with parent
// nt->nested field (recursive data)
// CL->course level info
// UL->user level info
// files->table may have files
//
//-----------------------------------------------------------
//THIS MOD BACKUP NEEDS TO USE THE mdl_backup_ids TABLE
//This module is special, because we make the backup in two steps:
// 1.-We backup every category and their questions (complete structure). It includes this tables:
// - quiz_categories
// - quiz_questions
// - quiz_truefalse
// - quiz_shortanswer
// - quiz_multianswer
// - quiz_multichoice
// - quiz_numerical
// - quiz_randomsamatch
// - quiz_match
// - quiz_match_sub
// - quiz_calculated
// - quiz_answers
// - quiz_numerical_units
// - quiz_question_datasets
// - quiz_dataset_definitions
// - quiz_dataset_items
// All this backup info have its own section in moodle.xml (QUESTION_CATEGORIES) and it's generated
// before every module backup standard invocation. And only if to backup quizzes has been selected !!
// It's invoked with quiz_backup_question_categories. (course independent).
// 2.-Standard module backup (Invoked via quiz_backup_mods). It includes this tables:
// - quiz
// - quiz_question_grades
// - quiz_attempts
// - quiz_grades
// - quiz_responses
// This step is the standard mod backup. (course dependent).
//STEP 1. Backup categories/questions and associated structures
// (course independent)
function quiz_backup_question_categories($bf,$preferences) {
global $CFG;
$status = true;
//First, we get the used categories from backup_ids
$categories = quiz_category_ids_by_backup ($preferences->backup_unique_code);
//If we've categories
if ($categories) {
//Write start tag
$status = fwrite($bf,start_tag("QUESTION_CATEGORIES",2,true));
//Iterate over each category
foreach ($categories as $cat) {
//Start category
$status =fwrite ($bf,start_tag("QUESTION_CATEGORY",3,true));
//Get category data from quiz_categories
$category = get_record ("quiz_categories","id",$cat->old_id);
//Print category contents
fwrite($bf,full_tag("ID",4,false,$category->id));
fwrite($bf,full_tag("NAME",4,false,$category->name));
fwrite($bf,full_tag("INFO",4,false,$category->info));
fwrite($bf,full_tag("PUBLISH",4,false,$category->publish));
fwrite($bf,full_tag("STAMP",4,false,$category->stamp));
//Now, backup their questions
$status = quiz_backup_question($bf,$preferences,$category->id);
//End category
$status =fwrite ($bf,end_tag("QUESTION_CATEGORY",3,true));
}
//Write end tag
$status =fwrite ($bf,end_tag("QUESTION_CATEGORIES",2,true));
}
return $status;
}
//This function backups all the questions in selected category and their
//asociated data
function quiz_backup_question($bf,$preferences,$category) {
global $CFG;
$status = true;
$questions = get_records("quiz_questions","category",$category,"id");
//If there is questions
if ($questions) {
//Write start tag
$status =fwrite ($bf,start_tag("QUESTIONS",4,true));
$counter = 0;
//Iterate over each question
foreach ($questions as $question) {
//Start question
$status =fwrite ($bf,start_tag("QUESTION",5,true));
//Print question contents
fwrite ($bf,full_tag("ID",6,false,$question->id));
fwrite ($bf,full_tag("NAME",6,false,$question->name));
fwrite ($bf,full_tag("QUESTIONTEXT",6,false,$question->questiontext));
fwrite ($bf,full_tag("QUESTIONTEXTFORMAT",6,false,$question->questiontextformat));
fwrite ($bf,full_tag("IMAGE",6,false,$question->image));
fwrite ($bf,full_tag("DEFAULTGRADE",6,false,$question->defaultgrade));
fwrite ($bf,full_tag("QTYPE",6,false,$question->qtype));
fwrite ($bf,full_tag("STAMP",6,false,$question->stamp));
fwrite ($bf,full_tag("VERSION",6,false,$question->version));
//Now, depending of the qtype, call one function or other
if ($question->qtype == "1") {
$status = quiz_backup_shortanswer($bf,$preferences,$question->id);
} else if ($question->qtype == "2") {
$status = quiz_backup_truefalse($bf,$preferences,$question->id);
} else if ($question->qtype == "3") {
$status = quiz_backup_multichoice($bf,$preferences,$question->id);
} else if ($question->qtype == "4") {
//Random question. Nothing to write.
} else if ($question->qtype == "5") {
$status = quiz_backup_match($bf,$preferences,$question->id);
} else if ($question->qtype == "6") {
$status = quiz_backup_randomsamatch($bf,$preferences,$question->id);
} else if ($question->qtype == "7") {
//Description question. Nothing to write.
} else if ($question->qtype == "8") {
$status = quiz_backup_numerical($bf,$preferences,$question->id);
} else if ($question->qtype == "9") {
$status = quiz_backup_multianswer($bf,$preferences,$question->id);
} else if ($question->qtype == "10") {
$status = quiz_backup_calculated($bf,$preferences,$question->id);
}
//End question
$status =fwrite ($bf,end_tag("QUESTION",5,true));
//Do some output
$counter++;
if ($counter % 10 == 0) {
echo ".";
if ($counter % 200 == 0) {
echo "<br />";
}
backup_flush(300);
}
}
//Write end tag
$status =fwrite ($bf,end_tag("QUESTIONS",4,true));
}
return $status;
}
//This function backups the data in a truefalse question (qtype=2) and its
//asociated data
function quiz_backup_truefalse($bf,$preferences,$question) {
global $CFG;
$status = true;
$truefalses = get_records("quiz_truefalse","question",$question,"id");
//If there are truefalses
if ($truefalses) {
//Iterate over each truefalse
foreach ($truefalses as $truefalse) {
$status =fwrite ($bf,start_tag("TRUEFALSE",6,true));
//Print truefalse contents
fwrite ($bf,full_tag("TRUEANSWER",7,false,$truefalse->trueanswer));
fwrite ($bf,full_tag("FALSEANSWER",7,false,$truefalse->falseanswer));
$status =fwrite ($bf,end_tag("TRUEFALSE",6,true));
}
//Now print quiz_answers
$status = quiz_backup_answers($bf,$preferences,$question);
}
return $status;
}
//This function backups the data in a shortanswer question (qtype=1) and its
//asociated data
function quiz_backup_shortanswer($bf,$preferences,$question,$level=6,$include_answers=true) {
global $CFG;
$status = true;
$shortanswers = get_records("quiz_shortanswer","question",$question,"id");
//If there are shortanswers
if ($shortanswers) {
//Iterate over each shortanswer
foreach ($shortanswers as $shortanswer) {
$status =fwrite ($bf,start_tag("SHORTANSWER",$level,true));
//Print shortanswer contents
fwrite ($bf,full_tag("ANSWERS",$level+1,false,$shortanswer->answers));
fwrite ($bf,full_tag("USECASE",$level+1,false,$shortanswer->usecase));
$status =fwrite ($bf,end_tag("SHORTANSWER",$level,true));
}
//Now print quiz_answers
if ($include_answers) {
$status = quiz_backup_answers($bf,$preferences,$question);
}
}
return $status;
}
//This function backups the data in a multichoice question (qtype=3) and its
//asociated data
function quiz_backup_multichoice($bf,$preferences,$question,$level=6,$include_answers=true) {
global $CFG;
$status = true;
$multichoices = get_records("quiz_multichoice","question",$question,"id");
//If there are multichoices
if ($multichoices) {
//Iterate over each multichoice
foreach ($multichoices as $multichoice) {
$status =fwrite ($bf,start_tag("MULTICHOICE",$level,true));
//Print multichoice contents
fwrite ($bf,full_tag("LAYOUT",$level+1,false,$multichoice->layout));
fwrite ($bf,full_tag("ANSWERS",$level+1,false,$multichoice->answers));
fwrite ($bf,full_tag("SINGLE",$level+1,false,$multichoice->single));
$status =fwrite ($bf,end_tag("MULTICHOICE",$level,true));
}
//Now print quiz_answers
if ($include_answers) {
$status = quiz_backup_answers($bf,$preferences,$question);
}
}
return $status;
}
//This function backups the data in a randomsamatch question (qtype=6) and its
//asociated data
function quiz_backup_randomsamatch($bf,$preferences,$question) {
global $CFG;
$status = true;
$randomsamatchs = get_records("quiz_randomsamatch","question",$question,"id");
//If there are randomsamatchs
if ($randomsamatchs) {
//Iterate over each randomsamatch
foreach ($randomsamatchs as $randomsamatch) {
$status =fwrite ($bf,start_tag("RANDOMSAMATCH",6,true));
//Print randomsamatch contents
fwrite ($bf,full_tag("CHOOSE",7,false,$randomsamatch->choose));
$status =fwrite ($bf,end_tag("RANDOMSAMATCH",6,true));
}
}
return $status;
}
//This function backups the data in a match question (qtype=5) and its
//asociated data
function quiz_backup_match($bf,$preferences,$question) {
global $CFG;
$status = true;
$matchs = get_records("quiz_match_sub","question",$question,"id");
//If there are matchs
if ($matchs) {
$status =fwrite ($bf,start_tag("MATCHS",6,true));
//Iterate over each match
foreach ($matchs as $match) {
$status =fwrite ($bf,start_tag("MATCH",7,true));
//Print match contents
fwrite ($bf,full_tag("ID",8,false,$match->id));
fwrite ($bf,full_tag("QUESTIONTEXT",8,false,$match->questiontext));
fwrite ($bf,full_tag("ANSWERTEXT",8,false,$match->answertext));
$status =fwrite ($bf,end_tag("MATCH",7,true));
}
$status =fwrite ($bf,end_tag("MATCHS",6,true));
}
return $status;
}
//This function backups the data in a numerical question (qtype=8) and its
//asociated data
function quiz_backup_numerical($bf,$preferences,$question,$level=6,$include_answers=true) {
global $CFG;
$status = true;
$numericals = get_records("quiz_numerical","question",$question,"id");
//If there are numericals
if ($numericals) {
//Iterate over each numerical
foreach ($numericals as $numerical) {
$status =fwrite ($bf,start_tag("NUMERICAL",$level,true));
//Print numerical contents
fwrite ($bf,full_tag("ANSWER",$level+1,false,$numerical->answer));
fwrite ($bf,full_tag("MIN",$level+1,false,$numerical->min));
fwrite ($bf,full_tag("MAX",$level+1,false,$numerical->max));
//Now backup numerical_units
$status = quiz_backup_numerical_units($bf,$preferences,$question,7);
$status =fwrite ($bf,end_tag("NUMERICAL",$level,true));
}
//Now print quiz_answers
if ($include_answers) {
$status = quiz_backup_answers($bf,$preferences,$question);
}
}
return $status;
}
//This function backups the data in a multianswer question (qtype=9) and its
//asociated data
function quiz_backup_multianswer($bf,$preferences,$question) {
global $CFG;
$status = true;
$multianswers = get_records("quiz_multianswers","question",$question,"id");
//If there are multianswers
if ($multianswers) {
//Print multianswers header
$status =fwrite ($bf,start_tag("MULTIANSWERS",6,true));
//Iterate over each multianswer
foreach ($multianswers as $multianswer) {
$status =fwrite ($bf,start_tag("MULTIANSWER",7,true));
//Print multianswer contents
fwrite ($bf,full_tag("ID",8,false,$multianswer->id));
fwrite ($bf,full_tag("ANSWERS",8,false,$multianswer->answers));
fwrite ($bf,full_tag("POSITIONKEY",8,false,$multianswer->positionkey));
fwrite ($bf,full_tag("ANSWERTYPE",8,false,$multianswer->answertype));
fwrite ($bf,full_tag("NORM",8,false,$multianswer->norm));
//Depending of the ANSWERTYPE, we must encode different info
//to be able to re-create records in quiz_shortanswer, quiz_multichoice and
//quiz_numerical
if ($multianswer->answertype == "1") {
$status = quiz_backup_shortanswer($bf,$preferences,$question,8,false);
} else if ($multianswer->answertype == "3") {
$status = quiz_backup_multichoice($bf,$preferences,$question,8,false);
} else if ($multianswer->answertype == "8") {
$status = quiz_backup_numerical($bf,$preferences,$question,8,false);
}
$status =fwrite ($bf,end_tag("MULTIANSWER",7,true));
}
//Print multianswers footer
$status =fwrite ($bf,end_tag("MULTIANSWERS",6,true));
//Now print quiz_answers
$status = quiz_backup_answers($bf,$preferences,$question);
}
return $status;
}
//This function backups the data in a calculated question (qtype=10) and its
//asociated data
function quiz_backup_calculated($bf,$preferences,$question,$level=6,$include_answers=true) {
global $CFG;
$status = true;
$calculateds = get_records("quiz_calculated","question",$question,"id");
//If there are calculated-s
if ($calculateds) {
//Iterate over each calculateds
foreach ($calculateds as $calculated) {
$status =fwrite ($bf,start_tag("CALCULATED",$level,true));
//Print calculated contents
fwrite ($bf,full_tag("ANSWER",$level+1,false,$calculated->answer));
fwrite ($bf,full_tag("TOLERANCE",$level+1,false,$calculated->tolerance));
fwrite ($bf,full_tag("TOLERANCETYPE",$level+1,false,$calculated->tolerancetype));
fwrite ($bf,full_tag("CORRECTANSWERLENGTH",$level+1,false,$calculated->correctanswerlength));
fwrite ($bf,full_tag("CORRECTANSWERFORMAT",$level+1,false,$calculated->correctanswerformat));
//Now backup numerical_units
$status = quiz_backup_numerical_units($bf,$preferences,$question,7);
//Now backup required dataset definitions and items...
$status = quiz_backup_datasets($bf,$preferences,$question,7);
//End calculated data
$status =fwrite ($bf,end_tag("CALCULATED",$level,true));
}
//Now print quiz_answers
if ($include_answers) {
$status = quiz_backup_answers($bf,$preferences,$question);
}
}
return $status;
}
//This function backups the answers data in some question types
//(truefalse, shortanswer,multichoice,numerical,calculated)
function quiz_backup_answers($bf,$preferences,$question) {
global $CFG;
$status = true;
$answers = get_records("quiz_answers","question",$question,"id");
//If there are answers
if ($answers) {
$status =fwrite ($bf,start_tag("ANSWERS",6,true));
//Iterate over each answer
foreach ($answers as $answer) {
$status =fwrite ($bf,start_tag("ANSWER",7,true));
//Print answer contents
fwrite ($bf,full_tag("ID",8,false,$answer->id));
fwrite ($bf,full_tag("ANSWER_TEXT",8,false,$answer->answer));
fwrite ($bf,full_tag("FRACTION",8,false,$answer->fraction));
fwrite ($bf,full_tag("FEEDBACK",8,false,$answer->feedback));
$status =fwrite ($bf,end_tag("ANSWER",7,true));
}
$status =fwrite ($bf,end_tag("ANSWERS",6,true));
}
return $status;
}
//This function backups quiz_numerical_units from different question types
function quiz_backup_numerical_units($bf,$preferences,$question,$level=7) {
global $CFG;
$status = true;
$numerical_units = get_records("quiz_numerical_units","question",$question,"id");
//If there are numericals_units
if ($numerical_units) {
$status =fwrite ($bf,start_tag("NUMERICAL_UNITS",$level,true));
//Iterate over each numerical_unit
foreach ($numerical_units as $numerical_unit) {
$status =fwrite ($bf,start_tag("NUMERICAL_UNIT",$level+1,true));
//Print numerical_unit contents
fwrite ($bf,full_tag("MULTIPLIER",$level+2,false,$numerical_unit->multiplier));
fwrite ($bf,full_tag("UNIT",$level+2,false,$numerical_unit->unit));
//Now backup numerical_units
$status =fwrite ($bf,end_tag("NUMERICAL_UNIT",$level+1,true));
}
$status =fwrite ($bf,end_tag("NUMERICAL_UNITS",$level,true));
}
return $status;
}
//This function backups dataset_definitions (via question_datasets) from different question types
function quiz_backup_datasets($bf,$preferences,$question,$level=7) {
global $CFG;
$status = true;
//First, we get the used datasets for this question
$question_datasets = get_records("quiz_question_datasets","question",$question,"id");
//If there are question_datasets
if ($question_datasets) {
$status =fwrite ($bf,start_tag("DATASET_DEFINITIONS",$level,true));
//Iterate over each question_dataset
foreach ($question_datasets as $question_dataset) {
$def = NULL;
//Get dataset_definition
if ($def = get_record("quiz_dataset_definitions","id",$question_dataset->datasetdefinition)) {;
$status =fwrite ($bf,start_tag("DATASET_DEFINITION",$level+1,true));
//Print question_dataset contents
fwrite ($bf,full_tag("CATEGORY",$level+2,false,$def->category));
fwrite ($bf,full_tag("NAME",$level+2,false,$def->name));
fwrite ($bf,full_tag("TYPE",$level+2,false,$def->type));
fwrite ($bf,full_tag("OPTIONS",$level+2,false,$def->options));
fwrite ($bf,full_tag("ITEMCOUNT",$level+2,false,$def->itemcount));
//Now backup dataset_entries
$status = quiz_backup_dataset_items($bf,$preferences,$def->id,$level+2);
//End dataset definition
$status =fwrite ($bf,end_tag("DATASET_DEFINITION",$level+1,true));
}
}
$status =fwrite ($bf,end_tag("DATASET_DEFINITIONS",$level,true));
}
return $status;
}
//This function backups datases_items from dataset_definitions
function quiz_backup_dataset_items($bf,$preferences,$datasetdefinition,$level=9) {
global $CFG;
$status = true;
//First, we get the datasets_items for this dataset_definition
$dataset_items = get_records("quiz_dataset_items","definition",$datasetdefinition,"id");
//If there are dataset_items
if ($dataset_items) {
$status =fwrite ($bf,start_tag("DATASET_ITEMS",$level,true));
//Iterate over each dataset_item
foreach ($dataset_items as $dataset_item) {
$status =fwrite ($bf,start_tag("DATASET_ITEM",$level+1,true));
//Print question_dataset contents
fwrite ($bf,full_tag("NUMBER",$level+2,false,$dataset_item->number));
fwrite ($bf,full_tag("VALUE",$level+2,false,$dataset_item->value));
//End dataset definition
$status =fwrite ($bf,end_tag("DATASET_ITEM",$level+1,true));
}
$status =fwrite ($bf,end_tag("DATASET_ITEMS",$level,true));
}
return $status;
}
//STEP 2. Backup quizzes and associated structures
// (course dependent)
function quiz_backup_mods($bf,$preferences) {
global $CFG;
$status = true;
//Iterate over quiz table
$quizzes = get_records ("quiz","course",$preferences->backup_course,"id");
if ($quizzes) {
foreach ($quizzes as $quiz) {
//Start mod
fwrite ($bf,start_tag("MOD",3,true));
//Print quiz data
fwrite ($bf,full_tag("ID",4,false,$quiz->id));
fwrite ($bf,full_tag("MODTYPE",4,false,"quiz"));
fwrite ($bf,full_tag("NAME",4,false,$quiz->name));
fwrite ($bf,full_tag("INTRO",4,false,$quiz->intro));
fwrite ($bf,full_tag("TIMEOPEN",4,false,$quiz->timeopen));
fwrite ($bf,full_tag("TIMECLOSE",4,false,$quiz->timeclose));
fwrite ($bf,full_tag("ATTEMPTS_NUMBER",4,false,$quiz->attempts));
fwrite ($bf,full_tag("ATTEMPTONLAST",4,false,$quiz->attemptonlast));
fwrite ($bf,full_tag("FEEDBACK",4,false,$quiz->feedback));
fwrite ($bf,full_tag("CORRECTANSWERS",4,false,$quiz->correctanswers));
fwrite ($bf,full_tag("GRADEMETHOD",4,false,$quiz->grademethod));
fwrite ($bf,full_tag("REVIEW",4,false,$quiz->review));
fwrite ($bf,full_tag("SHUFFLEQUESTIONS",4,false,$quiz->shufflequestions));
fwrite ($bf,full_tag("SHUFFLEANSWERS",4,false,$quiz->shuffleanswers));
fwrite ($bf,full_tag("QUESTIONS",4,false,$quiz->questions));
fwrite ($bf,full_tag("SUMGRADES",4,false,$quiz->sumgrades));
fwrite ($bf,full_tag("GRADE",4,false,$quiz->grade));
fwrite ($bf,full_tag("TIMECREATED",4,false,$quiz->timecreated));
fwrite ($bf,full_tag("TIMEMODIFIED",4,false,$quiz->timemodified));
fwrite ($bf,full_tag("TIMELIMIT",4,false,$quiz->timelimit));
fwrite ($bf,full_tag("PASSWORD",4,false,$quiz->password));
fwrite ($bf,full_tag("SUBNET",4,false,$quiz->subnet));
fwrite ($bf,full_tag("POPUP",4,false,$quiz->popup));
//Now we print to xml question_grades (Course Level)
$status = backup_quiz_question_grades($bf,$preferences,$quiz->id);
//if we've selected to backup users info, then execute:
// - backup_quiz_grades
// - backup_quiz_attempts
if ($preferences->mods["quiz"]->userinfo and $status) {
$status = backup_quiz_grades($bf,$preferences,$quiz->id);
if ($status) {
$status = backup_quiz_attempts($bf,$preferences,$quiz->id);
}
}
//End mod
$status =fwrite ($bf,end_tag("MOD",3,true));
}
}
return $status;
}
//Backup quiz_question_grades contents (executed from quiz_backup_mods)
function backup_quiz_question_grades ($bf,$preferences,$quiz) {
global $CFG;
$status = true;
$quiz_question_grades = get_records("quiz_question_grades","quiz",$quiz,"id");
//If there are question_grades
if ($quiz_question_grades) {
//Write start tag
$status =fwrite ($bf,start_tag("QUESTION_GRADES",4,true));
//Iterate over each question_grade
foreach ($quiz_question_grades as $que_gra) {
//Start question grade
$status =fwrite ($bf,start_tag("QUESTION_GRADE",5,true));
//Print question_grade contents
fwrite ($bf,full_tag("ID",6,false,$que_gra->id));
fwrite ($bf,full_tag("QUESTION",6,false,$que_gra->question));
fwrite ($bf,full_tag("GRADE",6,false,$que_gra->grade));
//End question grade
$status =fwrite ($bf,end_tag("QUESTION_GRADE",5,true));
}
//Write end tag
$status =fwrite ($bf,end_tag("QUESTION_GRADES",4,true));
}
return $status;
}
//Backup quiz_grades contents (executed from quiz_backup_mods)
function backup_quiz_grades ($bf,$preferences,$quiz) {
global $CFG;
$status = true;
$quiz_grades = get_records("quiz_grades","quiz",$quiz,"id");
//If there are grades
if ($quiz_grades) {
//Write start tag
$status =fwrite ($bf,start_tag("GRADES",4,true));
//Iterate over each grade
foreach ($quiz_grades as $gra) {
//Start grade
$status =fwrite ($bf,start_tag("GRADE",5,true));
//Print grade contents
fwrite ($bf,full_tag("ID",6,false,$gra->id));
fwrite ($bf,full_tag("USERID",6,false,$gra->userid));
fwrite ($bf,full_tag("GRADEVAL",6,false,$gra->grade));
fwrite ($bf,full_tag("TIMEMODIFIED",6,false,$gra->timemodified));
//End question grade
$status =fwrite ($bf,end_tag("GRADE",5,true));
}
//Write end tag
$status =fwrite ($bf,end_tag("GRADES",4,true));
}
return $status;
}
//Backup quiz_attempts contents (executed from quiz_backup_mods)
function backup_quiz_attempts ($bf,$preferences,$quiz) {
global $CFG;
$status = true;
$quiz_attempts = get_records("quiz_attempts","quiz",$quiz,"id");
//If there are attempts
if ($quiz_attempts) {
//Write start tag
$status =fwrite ($bf,start_tag("ATTEMPTS",4,true));
//Iterate over each attempt
foreach ($quiz_attempts as $attempt) {
//Start attempt
$status =fwrite ($bf,start_tag("ATTEMPT",5,true));
//Print attempt contents
fwrite ($bf,full_tag("ID",6,false,$attempt->id));
fwrite ($bf,full_tag("USERID",6,false,$attempt->userid));
fwrite ($bf,full_tag("ATTEMPTNUM",6,false,$attempt->attempt));
fwrite ($bf,full_tag("SUMGRADES",6,false,$attempt->sumgrades));
fwrite ($bf,full_tag("TIMESTART",6,false,$attempt->timestart));
fwrite ($bf,full_tag("TIMEFINISH",6,false,$attempt->timefinish));
fwrite ($bf,full_tag("TIMEMODIFIED",6,false,$attempt->timemodified));
//Now write to xml the responses (in this attempt)
$status = backup_quiz_responses ($bf,$preferences,$attempt->id);
//End attempt
$status =fwrite ($bf,end_tag("ATTEMPT",5,true));
}
//Write end tag
$status =fwrite ($bf,end_tag("ATTEMPTS",4,true));
}
return $status;
}
//Backup quiz_responses contents (executed from backup_quiz_attempts)
function backup_quiz_responses ($bf,$preferences,$attempt) {
global $CFG;
$status = true;
$quiz_responses = get_records("quiz_responses","attempt",$attempt,"id");
//If there are responses
if ($quiz_responses) {
//Write start tag
$status =fwrite ($bf,start_tag("RESPONSES",6,true));
//Iterate over each response
foreach ($quiz_responses as $response) {
//Start response
$status =fwrite ($bf,start_tag("RESPONSE",7,true));
//Print response contents
fwrite ($bf,full_tag("ID",8,false,$response->id));
fwrite ($bf,full_tag("QUESTION",8,false,$response->question));
fwrite ($bf,full_tag("ANSWER",8,false,$response->answer));
fwrite ($bf,full_tag("GRADE",8,false,$response->grade));
//End response
$status =fwrite ($bf,end_tag("RESPONSE",7,true));
}
//Write end tag
$status =fwrite ($bf,end_tag("RESPONSES",6,true));
}
return $status;
}
////Return an array of info (name,value)
function quiz_check_backup_mods($course,$user_data=false,$backup_unique_code) {
//Deletes data from mdl_backup_ids (categories section)
delete_category_ids ($backup_unique_code);
//Create date into mdl_backup_ids (categories section)
insert_category_ids ($course,$backup_unique_code);
//First the course data
$info[0][0] = get_string("modulenameplural","quiz");
if ($ids = quiz_ids ($course)) {
$info[0][1] = count($ids);
} else {
$info[0][1] = 0;
}
//Categories
$info[1][0] = get_string("categories","quiz");
if ($ids = quiz_category_ids_by_backup ($backup_unique_code)) {
$info[1][1] = count($ids);
} else {
$info[1][1] = 0;
}
//Questions
$info[2][0] = get_string("questions","quiz");
if ($ids = quiz_question_ids_by_backup ($backup_unique_code)) {
$info[2][1] = count($ids);
} else {
$info[2][1] = 0;
}
//Now, if requested, the user_data
if ($user_data) {
//Grades
$info[3][0] = get_string("grades");
if ($ids = quiz_grade_ids_by_course ($course)) {
$info[3][1] = count($ids);
} else {
$info[3][1] = 0;
}
}
return $info;
}
// INTERNAL FUNCTIONS. BASED IN THE MOD STRUCTURE
//Returns an array of quiz id
function quiz_ids ($course) {
global $CFG;
return get_records_sql ("SELECT a.id, a.course
FROM {$CFG->prefix}quiz a
WHERE a.course = '$course'");
}
//Returns an array of categories id
function quiz_category_ids_by_backup ($backup_unique_code) {
global $CFG;
return get_records_sql ("SELECT a.old_id, a.backup_code
FROM {$CFG->prefix}backup_ids a
WHERE a.backup_code = '$backup_unique_code' AND
a.table_name = 'quiz_categories'");
}
function quiz_question_ids_by_backup ($backup_unique_code) {
global $CFG;
return get_records_sql ("SELECT q.id, q.category
FROM {$CFG->prefix}backup_ids a,
{$CFG->prefix}quiz_questions q
WHERE a.backup_code = '$backup_unique_code' AND
q.category = a.old_id AND
a.table_name = 'quiz_categories'");
}
function quiz_grade_ids_by_course ($course) {
global $CFG;
return get_records_sql ("SELECT g.id, g.quiz
FROM {$CFG->prefix}quiz a,
{$CFG->prefix}quiz_grades g
WHERE a.course = '$course' and
g.quiz = a.id");
}
?>