mod/data/rate.php

   1 <?php  // $Id$
   2     require_once('../../config.php');
   3     require_once('lib.php');
   4
   5     $dataid = required_param('dataid', PARAM_INT); // The forum the rated posts are from
   6
   7     if (!$data = get_record('data', 'id', $dataid)) {
   8         error("Incorrect data id");
   9     }
  10
  11     if (!$course = get_record('course', 'id', $data->course)) {
  12         error("Course ID was incorrect");
  13     }
  14
  15     if (!$cm = get_coursemodule_from_instance('data', $data->id)) {
  16         error("Course Module ID was incorrect");
  17     }
  18
  19     require_login($course, false, $cm);
  20
  21     if (isguestuser()) {
  22         error("Guests are not allowed to rate entries.");
  23     }
  24
  25     $context = get_context_instance(CONTEXT_MODULE, $cm->id);
  26     require_capability('mod/data:rate', $context);
  27
  28     if (!$data->assessed) {
  29         error("Rating of items not allowed!");
  30     }
  31
  32     if (!$frmdata = data_submitted() or !confirm_sesskey()) {
  33         error("This page was not accessed correctly");
  34     }
  35
  36     $count = 0;
  37
  38     foreach ((array)$frmdata as $recordid => $rating) {
  39         if (!is_numeric($recordid)) {
  40             continue;
  41         }
  42
  43         if (!$record = get_record('data_records', 'id', $recordid)) {
  44             error("Record ID is incorrect");
  45         }
  46
  47         if ($data->id != $record->dataid) {
  48             error("Incorrect record.");
  49         }
  50
  51         if ($record->userid == $USER->id) {
  52             continue;
  53         }
  54
  55         // input validation ok
  56
  57         $count++;
  58
  59         if ($oldrating = get_record('data_ratings', 'userid', $USER->id, 'recordid', $record->id)) {
  60             if ($rating == -999) {
  61                 delete_records('data_ratings', 'userid', $oldrating->userid, 'recordid', $oldrating->recordid);
  62                 data_update_grades($data, $record->userid);
  63
  64             } else if ($rating != $oldrating->rating) {
  65                 $oldrating->rating = $rating;
  66                 if (! update_record('data_ratings', $oldrating)) {
  67                     error("Could not update an old rating ($record->id = $rating)");
  68                 }
  69                 data_update_grades($data, $record->userid);
  70
  71             }
  72
  73         } else if ($rating) {
  74             $newrating = new object();
  75             $newrating->userid   = $USER->id;
  76             $newrating->recordid = $record->id;
  77             $newrating->rating   = $rating;
  78             if (! insert_record('data_ratings', $newrating)) {
  79                 error("Could not insert a new rating ($record->id = $rating)");
  80             }
  81             data_update_grades($data, $record->userid);
  82         }
  83     }
  84
  85     if ($count == 0) {
  86         error("Incorrect submitted ratings data");
  87     }
  88
  89     if (!empty($_SERVER['HTTP_REFERER'])) {
  90         redirect($_SERVER['HTTP_REFERER'], get_string('ratingssaved', 'data'));
  91     } else {
  92         // try to guess where to return
  93         if ($count == 1) {
  94             redirect('view.php?mode=single&amp;rid='.$record->id, get_string('ratingssaved', 'data'));
  95         } else {
  96             redirect('view.php?d='.$data->id, get_string('ratingssaved', 'data'));
  97         }
  98     }
  99
 100 ?>