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[platal.git] / upgrade / 1.1.0 / old_surveys.inc.php
1 <?php
2 /***************************************************************************
3 * Copyright (C) 2003-2014 Polytechnique.org *
4 * http://opensource.polytechnique.org/ *
5 * *
6 * This program is free software; you can redistribute it and/or modify *
7 * it under the terms of the GNU General Public License as published by *
8 * the Free Software Foundation; either version 2 of the License, or *
9 * (at your option) any later version. *
10 * *
11 * This program is distributed in the hope that it will be useful, *
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
14 * GNU General Public License for more details. *
15 * *
16 * You should have received a copy of the GNU General Public License *
17 * along with this program; if not, write to the Free Software *
18 * Foundation, Inc., *
19 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
20 ***************************************************************************/
21
22 // {{{ class Survey : root of any survey, contains all questions
23 class Survey
24 {
25 // {{{ static properties and functions, regarding survey modes and question types
26 const MODE_ALL = 0;
27 const MODE_XANON = 1;
28 const MODE_XIDENT = 2;
29 private static $longModes = array(self::MODE_ALL => "sondage ouvert à tout le monde, anonyme",
30 self::MODE_XANON => "sondage restreint aux polytechniciens, anonyme",
31 self::MODE_XIDENT => "sondage restreint aux polytechniciens, non anonyme");
32 private static $shortModes = array(self::MODE_ALL => "tout le monde, anonyme",
33 self::MODE_XANON => "polytechniciens, anonyme",
34 self::MODE_XIDENT => "polytechniciens, non anonyme");
35
36 public static function getModes($long = true) {
37 return ($long)? self::$longModes : self::$shortModes;
38 }
39
40 private static $types = array('text' => 'Texte court',
41 'textarea' => 'Texte long',
42 'num' => 'Numérique',
43 'radio' => 'Choix multiples (une réponse)',
44 'checkbox' => 'Choix multiples (plusieurs réponses)',
45 'radiotable' => 'Questions multiples à choix multiples (une réponse)',
46 'checkboxtable' => 'Questions multiples à choix mutliples (plusieurs réponses)');
47
48 public static function getTypes()
49 {
50 return self::$types;
51 }
52
53 public static function isType($t)
54 {
55 return array_key_exists($t, self::$types);
56 }
57 // }}}
58
59 // {{{ properties, constructor and basic methods
60 private $id;
61 private $title;
62 private $description;
63 private $end;
64 private $mode;
65 private $promos;
66 private $valid;
67 private $questions;
68 private $creator;
69
70 public function __construct($args, $id = -1, $valid = false, $questions = null)
71 {
72 $this->update($args);
73 $this->id = $id;
74 $this->valid = $valid;
75 $this->questions = ($questions == null)? array() : $questions;
76 }
77
78 public function update($args)
79 {
80 $this->title = $args['title'];
81 $this->description = $args['description'];
82 $this->end = $args['end'];
83 $this->mode = (isset($args['mode']))? $args['mode'] : self::MODE_ALL;
84 $this->creator = $args['uid'];
85 if ($this->mode == self::MODE_ALL) {
86 $args['promos'] = '';
87 }
88 $args['promos'] = str_replace(' ', '', $args['promos']);
89 $this->promos = ($args['promos'] == '' || preg_match('#^(\d{4}-?|(\d{4})?-\d{4})(,(\d{4}-?|(\d{4})?-\d{4}))*$#', $args['promos']))? $args['promos'] : '#';
90 }
91
92 public function canSeeEarlyResults(User $user)
93 {
94 return $user->id() == $this->creator || $user->checkPerms('admin');
95 }
96 // }}}
97
98 // {{{ functions to access general information
99 public function isMode($mode)
100 {
101 return ($this->mode == $mode);
102 }
103
104 public function checkPromo($promo)
105 {
106 if ($this->promos == '') {
107 return true;
108 }
109 $promos = explode(',', $this->promos);
110 foreach ($promos as $p) {
111 if ((preg_match('#^\d{4}$#', $p) && $p == $promo) ||
112 (preg_match('#^\d{4}-$#', $p) && intval(substr($p, 0, 4)) <= $promo) ||
113 (preg_match('#^-\d{4}$#', $p) && intval(substr($p, 1)) >= $promo) ||
114 (preg_match('#^\d{4}-\d{4}$#', $p) &&
115 (intval(substr($p, 0, 4)) <= $promo && intval(substr($p, 5)) >= $promo ||
116 intval(substr($p, 0, 4)) >= $promo && intval(substr($p, 5)) <= $promo ))) {
117 return true;
118 }
119 }
120 return false;
121 }
122
123 public function isValid()
124 {
125 return $this->valid;
126 }
127
128 public function isEnded()
129 {
130 return (strtotime($this->end) - time() <= 0);
131 }
132
133 public function getTitle()
134 {
135 return $this->title;
136 }
137 // }}}
138
139 // {{{ function toArray() : converts a question (or the whole survey) to array, with results if the survey is ended
140 public function toArray($i = 'all')
141 {
142 if ($i != 'all' && $i != 'root') { // if a specific question is requested, then just returns this question converted to array
143 $i = intval($i);
144 if (array_key_exists($i, $this->questions)) {
145 return $this->questions[$i]->toArray();
146 } else {
147 return null;
148 }
149 } else { // else returns the root converted to array in any case
150 $a = array('title' => $this->title,
151 'description' => $this->description,
152 'end' => $this->end,
153 'mode' => $this->mode,
154 'promos' => $this->promos,
155 'valid' => $this->valid,
156 'type' => 'root');
157 if ($this->id != -1) {
158 $a['id'] = $this->id;
159 }
160 if ($this->isEnded()) { // if the survey is ended, then adds here the number of votes
161 $sql = 'SELECT COUNT(id)
162 FROM survey_votes
163 WHERE survey_id={?};';
164 $tot = XDB::query($sql, $this->id);
165 $a['votes'] = $tot->fetchOneCell();
166 }
167 if ($i == 'all' && count($this->questions) > 0) { // if the whole survey is requested, then returns all the questions converted to array
168 $qArr = array();
169 for ($k = 0; $k < count($this->questions); $k++) {
170 $q = $this->questions[$k]->toArray();
171 $q['id'] = $k;
172 if ($this->isEnded()) { // if the survey is ended, then adds here the results of this question
173 $q['result'] = $this->questions[$k]->getResultArray($this->id, $k);
174 }
175 $qArr[$k] = $q;
176 }
177 $a['questions'] = $qArr;
178 }
179 return $a;
180 }
181 }
182 // }}}
183
184 // {{{ function toCSV() : builds a CSV file containing all the results of the survey
185 public function toCSV($sep = ',', $enc = '"', $asep='|')
186 {
187 $nbq = count($this->questions);
188 //require_once dirname(__FILE__) . '/../../classes/varstream.php';
189 VarStream::init();
190 global $csv_output;
191 $csv_output = '';
192 $csv = fopen('var://csv_output', 'w');
193 $line = ($this->isMode(self::MODE_XIDENT))? array('id', 'Nom', 'Prenom', 'Promo') : array('id');
194 $qids = array();
195 for ($qid = 0; $qid < $nbq; $qid++) {
196 $qids[$qid] = count($line); // stores the first id of a question (in case of questions with subquestions)
197 array_splice($line, count($line), 0, $this->questions[$qid]->getCSVColumns()); // the first line contains the questions
198 }
199 $nbf = count($line);
200 $users = array();
201 if ($this->isMode(self::MODE_XIDENT)) { // if the mode is non anonymous
202 $users = User::getBulkUsersWithUIDs(XDB::fetchAllAssoc('vid', 'SELECT v.id AS vid, v.uid
203 FROM survey_votes AS v
204 WHERE v.survey_id = {?}
205 ORDER BY vid ASC',
206 $this->id));
207 }
208 $sql = 'SELECT v.id AS vid, a.question_id AS qid, a.answer AS answer
209 FROM survey_votes AS v
210 INNER JOIN survey_answers AS a ON a.vote_id=v.id
211 WHERE v.survey_id={?}
212 ORDER BY vid ASC, qid ASC, answer ASC';
213 $res = XDB::iterator($sql, $this->id); // retrieves all answers from database
214 $vid = -1;
215 $vid_ = 0;
216 while (($cur = $res->next()) != null) {
217 if ($vid != $cur['vid']) { // if the vote id changes, then starts a new line
218 fputcsv($csv, $line, $sep, $enc); // stores the former line into $csv_output
219 $vid = $cur['vid'];
220 $line = array_fill(0, $nbf, ''); // creates an array full of empty string
221 $line[0] = $vid_; // the first field is a 'clean' vote id (not the one stored in database)
222 if ($this->isMode(self::MODE_XIDENT)) { // if the mode is non anonymous
223 if (array_key_exists($vid, $users)) { // and if the user data can be found
224 $line[1] = $users[$vid]->lastName(); // adds the user data (in the first fields of the line)
225 $line[2] = $users[$vid]->firstName();;
226 $line[3] = $users[$vid]->promo();
227 }
228 }
229 $vid_++;
230 }
231 $ans = $this->questions[$cur['qid']]->formatAnswer($cur['answer']); // formats the current answer
232 if (!is_null($ans)) {
233 if (is_array($ans)) {
234 $fid = $qids[$cur['qid']] + $ans['id']; // computes the field id
235 $a = $ans['answer'];
236 } else {
237 $fid = $qids[$cur['qid']];
238 $a = $ans;
239 }
240 if ($line[$fid] != '') { // if this field already contains something
241 $line[$fid] .= $asep; // then adds a separator before adding the new answer
242 }
243 $line[$fid] .= $a; // adds the current answer to the correct field
244 }
245 }
246 fputcsv($csv, $line, $sep, $enc); // stores the last line into $csv_output
247 return $csv_output;
248 }
249 // }}}
250
251 // {{{ function factory($type, $args) : builds a question according to the given type
252 public function factory($t, $args)
253 {
254 switch ($t) {
255 case 'text':
256 return new SurveyText($args);
257 case 'textarea':
258 return new SurveyTextarea($args);
259 case 'num':
260 return new SurveyNum($args);
261 case 'radio':
262 return new SurveyRadio($args);
263 case 'checkbox':
264 return new SurveyCheckbox($args);
265 case 'radiotable':
266 return new SurveyRadioTable($args);
267 case 'checkboxtable':
268 return new SurveyCheckboxTable($args);
269 default:
270 return null;
271 }
272 }
273 // }}}
274
275 // {{{ questions manipulation functions
276 public function addQuestion($i, $c)
277 {
278 $i = intval($i);
279 if ($this->valid || $i > count($this->questions)) {
280 return false;
281 } else {
282 array_splice($this->questions, $i, 0, array($c));
283 return true;
284 }
285 }
286
287 public function delQuestion($i)
288 {
289 $i = intval($i);
290 if ($this->valid || !array_key_exists($i, $this->questions)) {
291 return false;
292 } else {
293 array_splice($this->questions, $i, 1);
294 return true;
295 }
296 }
297
298 public function editQuestion($i, $a)
299 {
300 if ($i == 'root') {
301 $this->update($a);
302 } else {
303 $i = intval($i);
304 if ($this->valid ||!array_key_exists($i, $this->questions)) {
305 return false;
306 } else {
307 $this->questions[$i]->update($a);
308 }
309 }
310 return true;
311 }
312 // }}}
313
314 // {{{ function checkSyntax() : checks syntax of the questions (currently the root only) before storing the survey in database
315 private static $errorMessages = array(
316 "datepassed" => "la date de fin de sondage est déjà dépassée : vous devez préciser une date future",
317 "promoformat" => "les restrictions à certaines promotions sont mal formattées"
318 );
319
320 public function checkSyntax()
321 {
322 $rArr = array();
323 // checks that the end date given is not already passed
324 // (unless the survey has already been validated : an admin can have a validated survey expired)
325 if (!$this->valid && $this->isEnded()) {
326 $rArr[] = array('question' => 'root', 'error' => self::$errorMessages["datepassed"]);
327 }
328 if ($this->promos != '' && !preg_match('#^(\d{4}-?|(\d{4})?-\d{4})(,(\d{4}-?|(\d{4})?-\d{4}))*$#', $this->promos)) {
329 $rArr[] = array('question' => 'root', 'error' => self::$errorMessages["promoformat"]);
330 }
331 return (empty($rArr))? null : $rArr;
332 }
333 // }}}
334
335 // {{{ functions that manipulate surveys in database
336 // {{{ static function retrieveList() : gets the list of available survey (current, old and not validated surveys)
337 public static function retrieveList($type, $tpl = true)
338 {
339 switch ($type) {
340 case 'c':
341 case 'current':
342 $where = 'end > NOW()';
343 break;
344 case 'o':
345 case 'old':
346 $where = 'end <= NOW()';
347 break;
348 default:
349 return null;
350 }
351 $sql = 'SELECT id, title, end, mode
352 FROM surveys
353 WHERE '.$where.'
354 ORDER BY end DESC;';
355 if ($tpl) {
356 return XDB::iterator($sql);
357 } else {
358 return XDB::iterRow($sql);
359 }
360 }
361 // }}}
362
363 // {{{ static function retrieveSurvey() : gets a survey in database (and unserialize the survey object structure)
364 public static function retrieveSurvey($sid)
365 {
366 $sql = 'SELECT questions, title, description, end, mode, promos, uid
367 FROM surveys
368 WHERE id={?}';
369 $res = XDB::query($sql, $sid);
370 $data = $res->fetchOneAssoc();
371 if (is_null($data) || !is_array($data)) {
372 return null;
373 }
374 $survey = new Survey($data, $sid, true, unserialize($data['questions']));
375 return $survey;
376 }
377 // }}}
378
379 // {{{ static function retrieveSurveyInfo() : gets information about a survey (title, description, end date, restrictions) but does not unserialize the survey object structure
380 public static function retrieveSurveyInfo($sid)
381 {
382 $sql = 'SELECT title, description, end, mode, promos
383 FROM surveys
384 WHERE id={?}';
385 $res = XDB::query($sql, $sid);
386 return $res->fetchOneAssoc();
387 }
388 // }}}
389
390 // {{{ static function retrieveSurveyReq() : gets a survey request to validate
391 public static function retrieveSurveyReq($id)
392 {
393 $surveyreq = Validate::get_request_by_id($id);
394 if ($surveyreq == null) {
395 return null;
396 }
397 $data = array('title' => $surveyreq->title,
398 'description' => $surveyreq->description,
399 'end' => $surveyreq->end,
400 'mode' => $surveyreq->mode,
401 'promos' => $surveyreq->promos);
402 $survey = new Survey($data, $id, false, $surveyreq->questions);
403 return $survey;
404 }
405 // }}}
406
407 // {{{ function proposeSurvey() : stores a proposition of survey in database (before validation)
408 public function proposeSurvey()
409 {
410 $surveyreq = new SurveyReq($this->title, $this->description, $this->end, $this->mode, $this->promos, $this->questions, S::user());
411 return $surveyreq->submit();
412 }
413 // }}}
414
415 // {{{ function updateSurvey() : updates a survey in database (before validation)
416 public function updateSurvey()
417 {
418 if ($this->valid) {
419 $sql = 'UPDATE surveys
420 SET questions={?},
421 title={?},
422 description={?},
423 end={?},
424 mode={?},
425 promos={?}
426 WHERE id={?};';
427 return XDB::execute($sql, serialize($this->questions), $this->title, $this->description, $this->end, $this->mode, $this->promos, $this->id);
428 } else {
429 $surveyreq = Validate::get_request_by_id($this->id);
430 if ($surveyreq == null) {
431 return false;
432 }
433 return $surveyreq->updateReq($this->title, $this->description, $this->end, $this->mode, $this->promos, $this->questions);
434 }
435 }
436 // }}}
437
438 // {{{ functions vote() and hasVoted() : handles vote to a survey
439 public function vote($uid, $args)
440 {
441 XDB::execute('INSERT INTO survey_votes
442 SET survey_id = {?}, uid = {?}',
443 $this->id, ($uid == 0) ? null : $uid); // notes the user as having voted
444 $vid = XDB::insertId();
445 for ($i = 0; $i < count($this->questions); $i++) {
446 $ans = $this->questions[$i]->checkAnswer($args[$i]);
447 if (!is_null($ans) && is_array($ans)) {
448 foreach ($ans as $a) {
449 XDB::execute('INSERT INTO survey_answers
450 SET vote_id = {?},
451 question_id = {?},
452 answer = {?}', $vid, $i, $a);
453 }
454 }
455 }
456 }
457
458 public function hasVoted($uid)
459 {
460 $res = XDB::query('SELECT id
461 FROM survey_votes
462 WHERE survey_id = {?} AND uid = {?};', $this->id, $uid); // checks whether the user has already voted
463 return ($res->numRows() != 0);
464 }
465 // }}}
466
467 // {{{ static function deleteSurvey() : deletes a survey (and all its votes)
468 public static function deleteSurvey($sid)
469 {
470 $sql = 'DELETE s.*, v.*, a.*
471 FROM surveys AS s
472 LEFT JOIN survey_votes AS v
473 ON v.survey_id=s.id
474 LEFT JOIN survey_answers AS a
475 ON a.vote_id=v.id
476 WHERE s.id={?};';
477 return XDB::execute($sql, $sid);
478 }
479 // }}}
480
481 // {{{ static function purgeVotes() : clears all votes concerning a survey (I'm not sure whether it's really useful)
482 public static function purgeVotes($sid)
483 {
484 $sql = 'DELETE v.*, a.*
485 FROM survey_votes AS v
486 LEFT JOIN survey_answers AS a
487 ON a.vote_id=v.id
488 WHERE v.survey_id={?};';
489 return XDB::execute($sql, $sid);
490 }
491 // }}}
492
493 // }}}
494 }
495 // }}}
496
497 // {{{ abstract class SurveyQuestion
498 abstract class SurveyQuestion
499 {
500 // {{{ common properties, constructor, and basic methods
501 private $question;
502 private $comment;
503
504 public function __construct($args)
505 {
506 $this->update($args);
507 }
508
509 public function update($a)
510 {
511 $this->question = $a['question'];
512 $this->comment = $a['comment'];
513 }
514
515 abstract protected function getQuestionType();
516 // }}}
517
518 // {{{ function toArray() : converts to array
519 public function toArray()
520 {
521 return array('type' => $this->getQuestionType(), 'question' => $this->question, 'comment' => $this->comment);
522 }
523 // }}}
524
525 // {{{ function checkSyntax() : checks question elements (before storing into database), not currently needed (with new structure)
526 protected function checkSyntax()
527 {
528 return null;
529 }
530 // }}}
531
532 // {{{ function checkAnswer : returns a correct answer (or a null value if error)
533 public function checkAnswer($ans)
534 {
535 return null;
536 }
537 // }}}
538
539 // {{{ functions regarding the results of a survey
540 abstract public function getResultArray($sid, $qid);
541
542 public function formatAnswer($ans)
543 {
544 return $ans;
545 }
546
547 public function getCSVColumns()
548 {
549 return $this->question;
550 }
551 // }}}
552 }
553 // }}}
554
555 // {{{ abstract class SurveySimple and its derived classes : "open" questions
556 // {{{ abstract class SurveySimple extends SurveyQuestion
557 abstract class SurveySimple extends SurveyQuestion
558 {
559 public function checkAnswer($ans)
560 {
561 return array($ans);
562 }
563
564 public function getResultArray($sid, $qid)
565 {
566 $sql = 'SELECT answer
567 FROM survey_answers
568 WHERE vote_id IN (SELECT id FROM survey_votes WHERE survey_id={?})
569 AND question_id={?}
570 ORDER BY RAND()
571 LIMIT 5;';
572 $res = XDB::query($sql, $sid, $qid);
573 return $res->fetchAllAssoc();
574 }
575 }
576 // }}}
577
578 // {{{ class SurveyText extends SurveySimple : simple text field, allowing a few words
579 class SurveyText extends SurveySimple
580 {
581 public function getQuestionType()
582 {
583 return "text";
584 }
585 }
586 // }}}
587
588 // {{{ class SurveyTextarea extends SurveySimple : textarea field, allowing longer comments
589 class SurveyTextarea extends SurveySimple
590 {
591 public function getQuestionType()
592 {
593 return "textarea";
594 }
595 }
596 // }}}
597
598 // {{{ class SurveyNum extends SurveySimple : allows numerical answers
599 class SurveyNum extends SurveySimple
600 {
601 public function checkAnswer($ans)
602 {
603 return array(intval($ans));
604 }
605
606 protected function getQuestionType()
607 {
608 return "num";
609 }
610 }
611 // }}}
612 // }}}
613
614 // {{{ abstract class SurveyList and its derived classes : restricted questions that allows only a list of possible answers
615 // {{{ abstract class SurveyList extends SurveyQuestion
616 abstract class SurveyList extends SurveyQuestion
617 {
618 protected $choices;
619
620 public function update($args)
621 {
622 parent::update($args);
623 $this->choices = array();
624 foreach ($args['choices'] as $val) {
625 if (trim($val) || trim($val) == '0') {
626 $this->choices[] = $val;
627 }
628 }
629 }
630
631 public function toArray()
632 {
633 $rArr = parent::toArray();
634 $rArr['choices'] = $this->choices;
635 return $rArr;
636 }
637
638 public function getResultArray($sid, $qid)
639 {
640 $sql = 'SELECT answer, COUNT(id) AS count
641 FROM survey_answers
642 WHERE vote_id IN (SELECT id FROM survey_votes WHERE survey_id={?})
643 AND question_id={?}
644 GROUP BY answer ASC';
645 $res = XDB::query($sql, $sid, $qid);
646 return $res->fetchAllAssoc();
647 }
648
649 public function formatAnswer($ans)
650 {
651 if (array_key_exists($ans, $this->choices)) {
652 return $this->choices[$ans];
653 } else {
654 return null;
655 }
656 }
657 }
658 // }}}
659
660 // {{{ class SurveyRadio extends SurveyList : radio question, allows one answer among the list offered
661 class SurveyRadio extends SurveyList
662 {
663 public function checkAnswer($ans)
664 {
665 $a = intval($ans);
666 return (array_key_exists($a, $this->choices))? array($a) : null;
667 }
668
669 protected function getQuestionType()
670 {
671 return "radio";
672 }
673 }
674 // }}}
675
676 // {{{ class SurveyCheckbox extends SurveyList : checkbox question, allows any number of answers among the list offered
677 class SurveyCheckbox extends SurveyList
678 {
679 public function checkAnswer($ans)
680 {
681 $rep = array();
682 foreach ($ans as $a) {
683 $a = intval($a);
684 if (array_key_exists($a, $this->choices)) {
685 $rep[] = $a;
686 }
687 }
688 return (count($rep) == 0)? null : $rep;
689 }
690
691 protected function getQuestionType()
692 {
693 return "checkbox";
694 }
695 }
696 // }}}
697 // }}}
698
699 // {{{ abstract class SurveyTable and its derived classes : table question, each column represents a choice, each line represents a question
700 // {{{ abstract class SurveyTable extends SurveyList
701 abstract class SurveyTable extends SurveyList
702 {
703 protected $subquestions;
704
705 public function update($args)
706 {
707 parent::update($args);
708 $this->subquestions = array();
709 foreach ($args['subquestions'] as $val) {
710 if (trim($val) || trim($val) == '0') {
711 $this->subquestions[] = $val;
712 }
713 }
714 }
715
716 public function toArray()
717 {
718 $rArr = parent::toArray();
719 $rArr['subquestions'] = $this->subquestions;
720 return $rArr;
721 }
722
723 public function getResultArray($sid, $qid)
724 {
725 $sql = 'SELECT answer, COUNT(id) AS count
726 FROM survey_answers
727 WHERE vote_id IN (SELECT id FROM survey_votes WHERE survey_id={?})
728 AND question_id={?}
729 GROUP BY answer ASC';
730 $res = XDB::iterator($sql, $sid, $qid);
731 $result = array();
732 for ($i = 0; $i < count($this->subquestions); $i++) {
733 $result[$i] = array_fill(0, count($this->choices), 0);
734 }
735 while ($r = $res->next()) {
736 list($i, $j) = explode(':', $r['answer']);
737 $result[$i][$j] = $r['count'];
738 }
739 return $result;
740 }
741
742 public function formatAnswer($ans)
743 {
744 list($q, $c) = explode(':', $ans);
745 if (array_key_exists($q, $this->subquestions) && array_key_exists($c, $this->choices)) {
746 return array('id' => $q, 'answer' => $this->choices[$c]);
747 } else {
748 return null;
749 }
750 }
751
752 public function getCSVColumns()
753 {
754 $q = parent::getCSVColumns();
755 if (empty($this->subquestions)) {
756 return $q;
757 }
758 $a = array();
759 for ($k = 0; $k < count($this->subquestions); $k++) {
760 $a[$k] = $q.' : '.$this->subquestions[$k];
761 }
762 return $a;
763 }
764 }
765 // }}}
766
767 // {{{ class SurveyRadioTable extends SurveyTable : SurveyTable with radio type choices
768 class SurveyRadioTable extends SurveyTable
769 {
770 public function checkAnswer($ans)
771 {
772 $rep = array();
773 foreach ($ans as $k => $a) {
774 if (!array_key_exists($k, $this->subquestions)) {
775 continue;
776 }
777 $a = intval($a);
778 if (array_key_exists($a, $this->choices)) {
779 $rep[] = $k . ':' . $a;
780 }
781 }
782 return (count($rep) == 0)? null : $rep;
783 }
784
785 protected function getQuestionType()
786 {
787 return "radiotable";
788 }
789
790 }
791 // }}}
792
793 // {{{ class SurveyCheckboxTable extends SurveyTable : SurveyTable with checkbox type choices
794 class SurveyCheckboxTable extends SurveyTable
795 {
796 public function checkAnswer($ans)
797 {
798 $rep = array();
799 foreach ($ans as $k => $aa) {
800 if (!array_key_exists($k, $this->subquestions)) {
801 continue;
802 }
803 foreach ($aa as $a) {
804 $a = intval($a);
805 if (array_key_exists($a, $this->choices)) {
806 $rep[] = $k . ':' . $a;
807 }
808 }
809 }
810 return (count($rep) == 0)? null : $rep;
811 }
812
813 protected function getQuestionType()
814 {
815 return "checkboxtable";
816 }
817
818 }
819 // }}}
820 // }}}
821
822 // vim:set et sw=4 sts=4 ts=4 foldmethod=marker enc=utf-8:
823 ?>