modules/survey/answer.inc.php

   1 <?php
   2 /***************************************************************************
   3  *  Copyright (C) 2003-2011 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 SurveyVote extends PlDBTableEntry
  23 {
  24     protected $survey;
  25     protected $user;
  26
  27     private $answers = array();
  28     private $fetchAnswers;
  29
  30     public function __construct(Survey $survey, User $user)
  31     {
  32         parent::__construct('survey_votes');
  33         $this->survey = $survey;
  34         $this->user = $user;
  35         $this->sid = $survey->id;
  36     }
  37
  38     protected function postSave()
  39     {
  40         Platal::assert(!is_null($this->vid), "Cannot process a vote without its identifier");
  41         XDB::execute("REPLACE INTO  survey_voters (sid, uid, vid)
  42                             VALUES  ({?}, {?}, {?})",
  43                      $this->survey->id, $this->user->id(),
  44                      $this->survey->flags->hasFlag('anonymous') ? null : $this->vid);
  45
  46         /* Save answers */
  47         $selector = new SurveyAnswer($this);
  48         $selector->delete();
  49
  50         $answers = array();
  51         foreach ($this->answers as $key=>$answer) {
  52             if (!is_null($answer)) {
  53                 $answer->vid = $this->vid;
  54                 $answers[] = $answer;
  55             }
  56         }
  57         PlDBTableEntry::insertBatch($answers);
  58         return true;
  59     }
  60
  61     protected function postFetch()
  62     {
  63         $selector = new SurveyAnswer($this);
  64         foreach ($selector as $answer) {
  65             $question = $this->survey->questionForId($answer->qid);
  66             $this->answers[$answer->qid] = $answer;
  67         }
  68         return true;
  69     }
  70
  71     public function inError()
  72     {
  73         foreach ($this->answers as $answer) {
  74             if ($answer->inError !== false) {
  75                 return true;
  76             }
  77         }
  78         return false;
  79     }
  80
  81     public function getAnswer(SurveyQuestion $question)
  82     {
  83         if (!isset($this->answers[$question->qid])) {
  84             $val = new SurveyAnswer($this);
  85             $val->qid = $question->qid;
  86             $this->answers[$question->qid] = $val;
  87         }
  88         return $this->answers[$question->qid];
  89     }
  90
  91     public function export()
  92     {
  93         $export = array();
  94         foreach ($this->answers as $qid=>$answer) {
  95             $export[$qid] = $answer->export();
  96         }
  97         return $export;
  98     }
  99
 100     public static function getVote(Survey $survey, User $user, $fetchAnswers = true)
 101     {
 102         $vid = XDB::query('SELECT  vid
 103                              FROM  survey_voters
 104                             WHERE  sid = {?} AND uid = {?}',
 105                           $survey->id, $user->id());
 106         if ($vid->numRows() == 0) {
 107             $vote = new SurveyVote($survey, $user);
 108             $vote->fetchAnswers = $fetchAnswers;
 109             return $vote;
 110         }
 111         $vid = $vid->fetchOneCell();
 112         if (is_null($vid)) {
 113             /* User already vote, but survey is anonymous and the vote
 114              * cannot be changed
 115              */
 116             return null;
 117         }
 118         $vote = new SurveyVote($survey, $user);
 119         $vote->vid = $vid;
 120         $vote->fetchAnswers = $fetchAnswers;
 121         $vote->fetch();
 122         return $vote;
 123     }
 124 }
 125
 126 class SurveyAnswer extends PlDBTableEntry
 127 {
 128     public $inError = false;
 129     public $vote;
 130
 131     public function __construct(SurveyVote $vote)
 132     {
 133         parent::__construct('survey_vote_answers');
 134         $this->registerFieldFormatter('answer', 'JSonFieldFormatter');
 135         $this->vote = $vote;
 136         if (!is_null($vote->vid)) {
 137             $this->vid = $vote->vid;
 138         }
 139     }
 140
 141     protected function preSave()
 142     {
 143         Platal::assert(!$this->inError, "Cannot save an invalid answer");
 144         $this->sid = $this->vote->sid;
 145         $this->vid = $this->vote->vid;
 146         return true;
 147     }
 148
 149     public function export()
 150     {
 151         $export = array();
 152         if (!is_null($this->answer)) {
 153             $export['value'] = $this->answer->export();
 154         }
 155         if ($this->inError !== false) {
 156             $export['error'] = $this->inError;
 157         }
 158         return $export;
 159     }
 160 }
 161
 162 // vim:set et sw=4 sts=4 ts=4 foldmethod=marker enc=utf-8:
 163 ?>