mod/data/rate.php

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