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   1  <?php  // $Id: format.php,v 1.6.2.2 2008/08/15 03:13:39 tjhunt Exp $ 
   2  
   3  ////////////////////////////////////////////////////////////////////////////
   4  /// AIKEN FORMAT
   5  ///
   6  /// This Moodle class provides all functions necessary to import and export 
   7  /// one-correct-answer multiple choice questions in this format:
   8  ///
   9  ///  Question text
  10  ///  A) Choice #1
  11  ///  B) Choice #2
  12  ///  C) Choice #3
  13  ///  D) Choice #4
  14  ///  ANSWER: B
  15  ///    (blank line next not necessary since "AN" at the beginning of a line 
  16  ///     triggers the question input and causes input to start all over.
  17  ///
  18  ///Only ONE correct answer is allowed with no feedback responses.
  19  ///
  20  ///Be sure to reword "All of the above" type questions as "All of these" (etc.) so that choices can
  21  ///  be randomized
  22  ///
  23  ////////////////////////////////////////////////////////////////////////////
  24  
  25  class qformat_aiken extends qformat_default {
  26  
  27    function provide_import() {
  28      return true;
  29    }
  30  
  31      function readquestions($lines){
  32          $questions = array();
  33          $question = $this->defaultquestion();
  34          $endchar = chr(13); 
  35          foreach ($lines as $line) {
  36              $stp = strpos($line,$endchar,0);
  37              $newlines = explode($endchar,$line);
  38              $foundQ = 0;
  39              for ($i=0; $i < count($newlines);$i++){
  40                  $nowline = addslashes(trim($newlines[$i]));
  41                  ///Go through the array and build an object called $question
  42                  ///When done, add $question to $questions
  43                  if (strlen($nowline) < 2) {
  44                      continue;
  45                  }
  46                  //                This will show everyline when file is being processed
  47                  //                print("$nowline<br />");
  48                  $leader = substr($nowline,0,2);
  49                  if (preg_match('/[A-Z][).]/',$leader)){
  50                      //trim off the label and space
  51                      $question->answer[] = htmlspecialchars(trim(substr($nowline,2)), ENT_NOQUOTES);
  52                      $question->fraction[] = 0;
  53                      $question->feedback[] = '';
  54                      continue;
  55                  }
  56                  if ($leader == "AN"){
  57                      $ans = trim(substr($nowline,strpos($nowline,':') + 1));
  58                      $ans = substr($ans,0,1);
  59                      //A becomes 0 since array starts from 0
  60                      $rightans = ord($ans) - ord('A');
  61                      $question->fraction[$rightans] = 1;
  62                      $questions[] = $question;
  63                      //clear array for next question set
  64                      $question = $this->defaultquestion();
  65                      continue;
  66                  } else {
  67                      //Must be the first line since no leader
  68                      $question->qtype = MULTICHOICE;
  69                      $question->name = htmlspecialchars(substr($nowline,0,50));
  70                      $question->questiontext = htmlspecialchars($nowline);
  71                      $question->single = 1;
  72                      $question->feedback[] = "";
  73                  }
  74              }
  75          }
  76          return $questions;
  77      }
  78  
  79      function readquestion($lines) {
  80          //this is no longer needed but might still be called by default.php
  81          return;
  82      }
  83  }
  84  
  85  ?>