Merge commit 'origin/fusionax' into account
[platal.git] / modules / survey / survey.inc.php
1 <?php
2 /***************************************************************************
3 * Copyright (C) 2003-2009 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 $questions;
68
69 public function __construct($args, $id = -1, $valid = false, $questions = null)
70 {
71 $this->update($args);
72 $this->id = $id;
73 $this->valid = $valid;
74 $this->questions = ($questions == null)? array() : $questions;
75 }
76
77 public function update($args)
78 {
79 $this->title = $args['title'];
80 $this->description = $args['description'];
81 $this->end = $args['end'];
82 $this->mode = (isset($args['mode']))? $args['mode'] : self::MODE_ALL;
83 if ($this->mode == self::MODE_ALL) {
84 $args['promos'] = '';
85 }
86 $args['promos'] = str_replace(' ', '', $args['promos']);
87 $this->promos = ($args['promos'] == '' || preg_match('#^(\d{4}-?|(\d{4})?-\d{4})(,(\d{4}-?|(\d{4})?-\d{4}))*$#', $args['promos']))? $args['promos'] : '#';
88 }
89 // }}}
90
91 // {{{ functions to access general information
92 public function isMode($mode)
93 {
94 return ($this->mode == $mode);
95 }
96
97 public function checkPromo($promo)
98 {
99 if ($this->promos == '') {
100 return true;
101 }
102 $promos = explode(',', $this->promos);
103 foreach ($promos as $p) {
104 if ((preg_match('#^\d{4}$#', $p) && $p == $promo) ||
105 (preg_match('#^\d{4}-$#', $p) && intval(substr($p, 0, 4)) <= $promo) ||
106 (preg_match('#^-\d{4}$#', $p) && intval(substr($p, 1)) >= $promo) ||
107 (preg_match('#^\d{4}-\d{4}$#', $p) && intval(substr($p, 0, 4)) <= $promo && intval(substr($p, 5)) >= $promo)) {
108 return true;
109 }
110 }
111 return false;
112 }
113
114 public function isValid()
115 {
116 return $this->valid;
117 }
118
119 public function isEnded()
120 {
121 return (strtotime($this->end) - time() <= 0);
122 }
123
124 public function getTitle()
125 {
126 return $this->title;
127 }
128 // }}}
129
130 // {{{ function toArray() : converts a question (or the whole survey) to array, with results if the survey is ended
131 public function toArray($i = 'all')
132 {
133 if ($i != 'all' && $i != 'root') { // if a specific question is requested, then just returns this question converted to array
134 $i = intval($i);
135 if (array_key_exists($i, $this->questions)) {
136 return $this->questions[$i]->toArray();
137 } else {
138 return null;
139 }
140 } else { // else returns the root converted to array in any case
141 $a = array('title' => $this->title,
142 'description' => $this->description,
143 'end' => $this->end,
144 'mode' => $this->mode,
145 'promos' => $this->promos,
146 'valid' => $this->valid,
147 'type' => 'root');
148 if ($this->id != -1) {
149 $a['id'] = $this->id;
150 }
151 if ($this->isEnded()) { // if the survey is ended, then adds here the number of votes
152 $sql = 'SELECT COUNT(id)
153 FROM survey_votes
154 WHERE survey_id={?};';
155 $tot = XDB::query($sql, $this->id);
156 $a['votes'] = $tot->fetchOneCell();
157 }
158 if ($i == 'all' && count($this->questions) > 0) { // if the whole survey is requested, then returns all the questions converted to array
159 $qArr = array();
160 for ($k = 0; $k < count($this->questions); $k++) {
161 $q = $this->questions[$k]->toArray();
162 $q['id'] = $k;
163 if ($this->isEnded()) { // if the survey is ended, then adds here the results of this question
164 $q['result'] = $this->questions[$k]->getResultArray($this->id, $k);
165 }
166 $qArr[$k] = $q;
167 }
168 $a['questions'] = $qArr;
169 }
170 return $a;
171 }
172 }
173 // }}}
174
175 // {{{ function toCSV() : builds a CSV file containing all the results of the survey
176 public function toCSV($sep = ',', $enc = '"', $asep='|')
177 {
178 $nbq = count($this->questions);
179 //require_once dirname(__FILE__) . '/../../classes/varstream.php';
180 VarStream::init();
181 global $csv_output;
182 $csv_output = '';
183 $csv = fopen('var://csv_output', 'w');
184 $line = ($this->isMode(self::MODE_XIDENT))? array('id', 'Nom', 'Prenom', 'Promo') : array('id');
185 $qids = array();
186 for ($qid = 0; $qid < $nbq; $qid++) {
187 $qids[$qid] = count($line); // stores the first id of a question (in case of questions with subquestions)
188 array_splice($line, count($line), 0, $this->questions[$qid]->getCSVColumns()); // the first line contains the questions
189 }
190 $nbf = count($line);
191 $users = array();
192 if ($this->isMode(self::MODE_XIDENT)) { // if the mode is non anonymous
193 $users = User::getBulkUsersWithUIDs(XDB::fetchAllAssoc('vid', 'SELECT v.id AS vid, v.user_id
194 FROM survey_votes AS v
195 WHERE v.survey_id = {?}
196 ORDER BY vid ASC',
197 $this->id));
198 }
199 $sql = 'SELECT v.id AS vid, a.question_id AS qid, a.answer AS answer
200 FROM survey_votes AS v
201 LEFT JOIN survey_answers AS a
202 ON a.vote_id=v.id
203 WHERE v.survey_id={?}
204 ORDER BY vid ASC, qid ASC, answer ASC;';
205 $res = XDB::iterator($sql, $this->id); // retrieves all answers from database
206 $vid = -1;
207 $vid_ = 0;
208 while (($cur = $res->next()) != null) {
209 if ($vid != $cur['vid']) { // if the vote id changes, then starts a new line
210 fputcsv($csv, $line, $sep, $enc); // stores the former line into $csv_output
211 $vid = $cur['vid'];
212 $line = array_fill(0, $nbf, ''); // creates an array full of empty string
213 $line[0] = $vid_; // the first field is a 'clean' vote id (not the one stored in database)
214 if ($this->isMode(self::MODE_XIDENT)) { // if the mode is non anonymous
215 if (array_key_exists($vid, $users)) { // and if the user data can be found
216 $line[1] = $users[$vid]->lastName(); // adds the user data (in the first fields of the line)
217 $line[2] = $users[$vid]->firstName();;
218 $line[3] = $users[$vid]->promo();
219 }
220 }
221 $vid_++;
222 }
223 $ans = $this->questions[$cur['qid']]->formatAnswer($cur['answer']); // formats the current answer
224 if (!is_null($ans)) {
225 if (is_array($ans)) {
226 $fid = $qids[$cur['qid']] + $ans['id']; // computes the field id
227 $a = $ans['answer'];
228 } else {
229 $fid = $qids[$cur['qid']];
230 $a = $ans;
231 }
232 if ($line[$fid] != '') { // if this field already contains something
233 $line[$fid] .= $asep; // then adds a separator before adding the new answer
234 }
235 $line[$fid] .= $a; // adds the current answer to the correct field
236 }
237 }
238 fputcsv($csv, $line, $sep, $enc); // stores the last line into $csv_output
239 return $csv_output;
240 }
241 // }}}
242
243 // {{{ function factory($type, $args) : builds a question according to the given type
244 public function factory($t, $args)
245 {
246 switch ($t) {
247 case 'text':
248 return new SurveyText($args);
249 case 'textarea':
250 return new SurveyTextarea($args);
251 case 'num':
252 return new SurveyNum($args);
253 case 'radio':
254 return new SurveyRadio($args);
255 case 'checkbox':
256 return new SurveyCheckbox($args);
257 case 'radiotable':
258 return new SurveyRadioTable($args);
259 case 'checkboxtable':
260 return new SurveyCheckboxTable($args);
261 default:
262 return null;
263 }
264 }
265 // }}}
266
267 // {{{ questions manipulation functions
268 public function addQuestion($i, $c)
269 {
270 $i = intval($i);
271 if ($this->valid || $i > count($this->questions)) {
272 return false;
273 } else {
274 array_splice($this->questions, $i, 0, array($c));
275 return true;
276 }
277 }
278
279 public function delQuestion($i)
280 {
281 $i = intval($i);
282 if ($this->valid || !array_key_exists($i, $this->questions)) {
283 return false;
284 } else {
285 array_splice($this->questions, $i, 1);
286 return true;
287 }
288 }
289
290 public function editQuestion($i, $a)
291 {
292 if ($i == 'root') {
293 $this->update($a);
294 } else {
295 $i = intval($i);
296 if ($this->valid ||!array_key_exists($i, $this->questions)) {
297 return false;
298 } else {
299 $this->questions[$i]->update($a);
300 }
301 }
302 return true;
303 }
304 // }}}
305
306 // {{{ function checkSyntax() : checks syntax of the questions (currently the root only) before storing the survey in database
307 private static $errorMessages = array(
308 "datepassed" => "la date de fin de sondage est déjà dépassée : vous devez préciser une date future",
309 "promoformat" => "les restrictions à certaines promotions sont mal formattées"
310 );
311
312 public function checkSyntax()
313 {
314 $rArr = array();
315 // checks that the end date given is not already passed
316 // (unless the survey has already been validated : an admin can have a validated survey expired)
317 if (!$this->valid && $this->isEnded()) {
318 $rArr[] = array('question' => 'root', 'error' => self::$errorMessages["datepassed"]);
319 }
320 if ($this->promos != '' && !preg_match('#^(\d{4}-?|(\d{4})?-\d{4})(,(\d{4}-?|(\d{4})?-\d{4}))*$#', $this->promos)) {
321 $rArr[] = array('question' => 'root', 'error' => self::$errorMessages["promoformat"]);
322 }
323 return (empty($rArr))? null : $rArr;
324 }
325 // }}}
326
327 // {{{ functions that manipulate surveys in database
328 // {{{ static function retrieveList() : gets the list of available survey (current, old and not validated surveys)
329 public static function retrieveList($type, $tpl = true)
330 {
331 switch ($type) {
332 case 'c':
333 case 'current':
334 $where = 'end > NOW()';
335 break;
336 case 'o':
337 case 'old':
338 $where = 'end <= NOW()';
339 break;
340 default:
341 return null;
342 }
343 $sql = 'SELECT id, title, end, mode
344 FROM survey_surveys
345 WHERE '.$where.'
346 ORDER BY end DESC;';
347 if ($tpl) {
348 return XDB::iterator($sql);
349 } else {
350 return XDB::iterRow($sql);
351 }
352 }
353 // }}}
354
355 // {{{ static function retrieveSurvey() : gets a survey in database (and unserialize the survey object structure)
356 public static function retrieveSurvey($sid)
357 {
358 $sql = 'SELECT questions, title, description, end, mode, promos
359 FROM survey_surveys
360 WHERE id={?}';
361 $res = XDB::query($sql, $sid);
362 $data = $res->fetchOneAssoc();
363 if (is_null($data) || !is_array($data)) {
364 return null;
365 }
366 $survey = new Survey($data, $sid, true, unserialize($data['questions']));
367 return $survey;
368 }
369 // }}}
370
371 // {{{ static function retrieveSurveyInfo() : gets information about a survey (title, description, end date, restrictions) but does not unserialize the survey object structure
372 public static function retrieveSurveyInfo($sid)
373 {
374 $sql = 'SELECT title, description, end, mode, promos
375 FROM survey_surveys
376 WHERE id={?}';
377 $res = XDB::query($sql, $sid);
378 return $res->fetchOneAssoc();
379 }
380 // }}}
381
382 // {{{ static function retrieveSurveyReq() : gets a survey request to validate
383 public static function retrieveSurveyReq($id)
384 {
385 require_once 'validations.inc.php';
386 $surveyreq = Validate::get_request_by_id($id);
387 if ($surveyreq == null) {
388 return null;
389 }
390 $data = array('title' => $surveyreq->title,
391 'description' => $surveyreq->description,
392 'end' => $surveyreq->end,
393 'mode' => $surveyreq->mode,
394 'promos' => $surveyreq->promos);
395 $survey = new Survey($data, $id, false, $surveyreq->questions);
396 return $survey;
397 }
398 // }}}
399
400 // {{{ function proposeSurvey() : stores a proposition of survey in database (before validation)
401 public function proposeSurvey()
402 {
403 require_once 'validations.inc.php';
404 $surveyreq = new SurveyReq($this->title, $this->description, $this->end, $this->mode, $this->promos, $this->questions, S::user());
405 return $surveyreq->submit();
406 }
407 // }}}
408
409 // {{{ function updateSurvey() : updates a survey in database (before validation)
410 public function updateSurvey()
411 {
412 if ($this->valid) {
413 $sql = 'UPDATE survey_surveys
414 SET questions={?},
415 title={?},
416 description={?},
417 end={?},
418 mode={?},
419 promos={?}
420 WHERE id={?};';
421 return XDB::execute($sql, serialize($this->questions), $this->title, $this->description, $this->end, $this->mode, $this->promos, $this->id);
422 } else {
423 require_once 'validations.inc.php';
424 $surveyreq = Validate::get_request_by_id($this->id);
425 if ($surveyreq == null) {
426 return false;
427 }
428 return $surveyreq->updateReq($this->title, $this->description, $this->end, $this->mode, $this->promos, $this->questions);
429 }
430 }
431 // }}}
432
433 // {{{ functions vote() and hasVoted() : handles vote to a survey
434 public function vote($uid, $args)
435 {
436 XDB::execute('INSERT INTO survey_votes
437 SET survey_id={?}, user_id={?};', $this->id, $uid); // notes the user as having voted
438 $vid = XDB::insertId();
439 for ($i = 0; $i < count($this->questions); $i++) {
440 $ans = $this->questions[$i]->checkAnswer($args[$i]);
441 if (!is_null($ans) && is_array($ans)) {
442 foreach ($ans as $a) {
443 XDB::execute('INSERT INTO survey_answers
444 SET vote_id = {?},
445 question_id = {?},
446 answer = {?}', $vid, $i, $a);
447 }
448 }
449 }
450 }
451
452 public function hasVoted($uid)
453 {
454 $res = XDB::query('SELECT id
455 FROM survey_votes
456 WHERE survey_id={?} AND user_id={?};', $this->id, $uid); // checks whether the user has already voted
457 return ($res->numRows() != 0);
458 }
459 // }}}
460
461 // {{{ static function deleteSurvey() : deletes a survey (and all its votes)
462 public static function deleteSurvey($sid)
463 {
464 $sql = 'DELETE s.*, v.*, a.*
465 FROM survey_surveys AS s
466 LEFT JOIN survey_votes AS v
467 ON v.survey_id=s.id
468 LEFT JOIN survey_answers AS a
469 ON a.vote_id=v.id
470 WHERE s.id={?};';
471 return XDB::execute($sql, $sid);
472 }
473 // }}}
474
475 // {{{ static function purgeVotes() : clears all votes concerning a survey (I'm not sure whether it's really useful)
476 public static function purgeVotes($sid)
477 {
478 $sql = 'DELETE v.*, a.*
479 FROM survey_votes AS v
480 LEFT JOIN survey_answers AS a
481 ON a.vote_id=v.id
482 WHERE v.survey_id={?};';
483 return XDB::execute($sql, $sid);
484 }
485 // }}}
486
487 // }}}
488 }
489 // }}}
490
491 // {{{ abstract class SurveyQuestion
492 abstract class SurveyQuestion
493 {
494 // {{{ common properties, constructor, and basic methods
495 private $question;
496 private $comment;
497
498 public function __construct($args)
499 {
500 $this->update($args);
501 }
502
503 public function update($a)
504 {
505 $this->question = $a['question'];
506 $this->comment = $a['comment'];
507 }
508
509 abstract protected function getQuestionType();
510 // }}}
511
512 // {{{ function toArray() : converts to array
513 public function toArray()
514 {
515 return array('type' => $this->getQuestionType(), 'question' => $this->question, 'comment' => $this->comment);
516 }
517 // }}}
518
519 // {{{ function checkSyntax() : checks question elements (before storing into database), not currently needed (with new structure)
520 protected function checkSyntax()
521 {
522 return null;
523 }
524 // }}}
525
526 // {{{ function checkAnswer : returns a correct answer (or a null value if error)
527 public function checkAnswer($ans)
528 {
529 return null;
530 }
531 // }}}
532
533 // {{{ functions regarding the results of a survey
534 abstract public function getResultArray($sid, $qid);
535
536 public function formatAnswer($ans)
537 {
538 return $ans;
539 }
540
541 public function getCSVColumns()
542 {
543 return $this->question;
544 }
545 // }}}
546 }
547 // }}}
548
549 // {{{ abstract class SurveySimple and its derived classes : "open" questions
550 // {{{ abstract class SurveySimple extends SurveyQuestion
551 abstract class SurveySimple extends SurveyQuestion
552 {
553 public function checkAnswer($ans)
554 {
555 return array($ans);
556 }
557
558 public function getResultArray($sid, $qid)
559 {
560 $sql = 'SELECT answer
561 FROM survey_answers
562 WHERE vote_id IN (SELECT id FROM survey_votes WHERE survey_id={?})
563 AND question_id={?}
564 ORDER BY RAND()
565 LIMIT 5;';
566 $res = XDB::query($sql, $sid, $qid);
567 return $res->fetchAllAssoc();
568 }
569 }
570 // }}}
571
572 // {{{ class SurveyText extends SurveySimple : simple text field, allowing a few words
573 class SurveyText extends SurveySimple
574 {
575 public function getQuestionType()
576 {
577 return "text";
578 }
579 }
580 // }}}
581
582 // {{{ class SurveyTextarea extends SurveySimple : textarea field, allowing longer comments
583 class SurveyTextarea extends SurveySimple
584 {
585 public function getQuestionType()
586 {
587 return "textarea";
588 }
589 }
590 // }}}
591
592 // {{{ class SurveyNum extends SurveySimple : allows numerical answers
593 class SurveyNum extends SurveySimple
594 {
595 public function checkAnswer($ans)
596 {
597 return array(intval($ans));
598 }
599
600 protected function getQuestionType()
601 {
602 return "num";
603 }
604 }
605 // }}}
606 // }}}
607
608 // {{{ abstract class SurveyList and its derived classes : restricted questions that allows only a list of possible answers
609 // {{{ abstract class SurveyList extends SurveyQuestion
610 abstract class SurveyList extends SurveyQuestion
611 {
612 protected $choices;
613
614 public function update($args)
615 {
616 parent::update($args);
617 $this->choices = array();
618 foreach ($args['choices'] as $val) {
619 if (trim($val) || trim($val) == '0') {
620 $this->choices[] = $val;
621 }
622 }
623 }
624
625 public function toArray()
626 {
627 $rArr = parent::toArray();
628 $rArr['choices'] = $this->choices;
629 return $rArr;
630 }
631
632 public function getResultArray($sid, $qid)
633 {
634 $sql = 'SELECT answer, COUNT(id) AS count
635 FROM survey_answers
636 WHERE vote_id IN (SELECT id FROM survey_votes WHERE survey_id={?})
637 AND question_id={?}
638 GROUP BY answer ASC';
639 $res = XDB::query($sql, $sid, $qid);
640 return $res->fetchAllAssoc();
641 }
642
643 public function formatAnswer($ans)
644 {
645 if (array_key_exists($ans, $this->choices)) {
646 return $this->choices[$ans];
647 } else {
648 return null;
649 }
650 }
651 }
652 // }}}
653
654 // {{{ class SurveyRadio extends SurveyList : radio question, allows one answer among the list offered
655 class SurveyRadio extends SurveyList
656 {
657 public function checkAnswer($ans)
658 {
659 $a = intval($ans);
660 return (array_key_exists($a, $this->choices))? array($a) : null;
661 }
662
663 protected function getQuestionType()
664 {
665 return "radio";
666 }
667 }
668 // }}}
669
670 // {{{ class SurveyCheckbox extends SurveyList : checkbox question, allows any number of answers among the list offered
671 class SurveyCheckbox extends SurveyList
672 {
673 public function checkAnswer($ans)
674 {
675 $rep = array();
676 foreach ($ans as $a) {
677 $a = intval($a);
678 if (array_key_exists($a, $this->choices)) {
679 $rep[] = $a;
680 }
681 }
682 return (count($rep) == 0)? null : $rep;
683 }
684
685 protected function getQuestionType()
686 {
687 return "checkbox";
688 }
689 }
690 // }}}
691 // }}}
692
693 // {{{ abstract class SurveyTable and its derived classes : table question, each column represents a choice, each line represents a question
694 // {{{ abstract class SurveyTable extends SurveyList
695 abstract class SurveyTable extends SurveyList
696 {
697 protected $subquestions;
698
699 public function update($args)
700 {
701 parent::update($args);
702 $this->subquestions = array();
703 foreach ($args['subquestions'] as $val) {
704 if (trim($val) || trim($val) == '0') {
705 $this->subquestions[] = $val;
706 }
707 }
708 }
709
710 public function toArray()
711 {
712 $rArr = parent::toArray();
713 $rArr['subquestions'] = $this->subquestions;
714 return $rArr;
715 }
716
717 public function getResultArray($sid, $qid)
718 {
719 $sql = 'SELECT answer, COUNT(id) AS count
720 FROM survey_answers
721 WHERE vote_id IN (SELECT id FROM survey_votes WHERE survey_id={?})
722 AND question_id={?}
723 GROUP BY answer ASC';
724 $res = XDB::iterator($sql, $sid, $qid);
725 $result = array();
726 for ($i = 0; $i < count($this->subquestions); $i++) {
727 $result[$i] = array_fill(0, count($this->choices), 0);
728 }
729 while ($r = $res->next()) {
730 list($i, $j) = explode(':', $r['answer']);
731 $result[$i][$j] = $r['count'];
732 }
733 return $result;
734 }
735
736 public function formatAnswer($ans)
737 {
738 list($q, $c) = explode(':', $ans);
739 if (array_key_exists($q, $this->subquestions) && array_key_exists($c, $this->choices)) {
740 return array('id' => $q, 'answer' => $this->choices[$c]);
741 } else {
742 return null;
743 }
744 }
745
746 public function getCSVColumns()
747 {
748 $q = parent::getCSVColumns();
749 if (empty($this->subquestions)) {
750 return $q;
751 }
752 $a = array();
753 for ($k = 0; $k < count($this->subquestions); $k++) {
754 $a[$k] = $q.' : '.$this->subquestions[$k];
755 }
756 return $a;
757 }
758 }
759 // }}}
760
761 // {{{ class SurveyRadioTable extends SurveyTable : SurveyTable with radio type choices
762 class SurveyRadioTable extends SurveyTable
763 {
764 public function checkAnswer($ans)
765 {
766 $rep = array();
767 foreach ($ans as $k => $a) {
768 if (!array_key_exists($k, $this->subquestions)) {
769 continue;
770 }
771 $a = intval($a);
772 if (array_key_exists($a, $this->choices)) {
773 $rep[] = $k . ':' . $a;
774 }
775 }
776 return (count($rep) == 0)? null : $rep;
777 }
778
779 protected function getQuestionType()
780 {
781 return "radiotable";
782 }
783
784 }
785 // }}}
786
787 // {{{ class SurveyCheckboxTable extends SurveyTable : SurveyTable with checkbox type choices
788 class SurveyCheckboxTable extends SurveyTable
789 {
790 public function checkAnswer($ans)
791 {
792 $rep = array();
793 foreach ($ans as $k => $aa) {
794 if (!array_key_exists($k, $this->subquestions)) {
795 continue;
796 }
797 foreach ($aa as $a) {
798 $a = intval($a);
799 if (array_key_exists($a, $this->choices)) {
800 $rep[] = $k . ':' . $a;
801 }
802 }
803 }
804 return (count($rep) == 0)? null : $rep;
805 }
806
807 protected function getQuestionType()
808 {
809 return "checkboxtable";
810 }
811
812 }
813 // }}}
814 // }}}
815
816 // vim:set et sw=4 sts=4 ts=4 foldmethod=marker enc=utf-8:
817 ?>