rating/rate_ajax.php

   1 <?php
   2 // This file is part of Moodle - http://moodle.org/
   3 //
   4 // Moodle is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, either version 3 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // Moodle is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License
  15 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 /**
  18  * This page receives ajax rating submissions
  19  *
  20  * It is similar to rate.php. Unlike rate.php a return url is NOT required.
  21  *
  22  * @package    core_rating
  23  * @category   rating
  24  * @copyright  2010 Andrew Davis
  25  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  26  */
  27
  28 define('AJAX_SCRIPT', true);
  29
  30 require_once('../config.php');
  31 require_once($CFG->dirroot.'/rating/lib.php');
  32
  33 $contextid         = required_param('contextid', PARAM_INT);
  34 $component         = required_param('component', PARAM_COMPONENT);
  35 $ratingarea        = required_param('ratingarea', PARAM_AREA);
  36 $itemid            = required_param('itemid', PARAM_INT);
  37 $scaleid           = required_param('scaleid', PARAM_INT);
  38 $userrating        = required_param('rating', PARAM_INT);
  39 $rateduserid       = required_param('rateduserid', PARAM_INT); // The user being rated. Required to update their grade.
  40 $aggregationmethod = optional_param('aggregation', RATING_AGGREGATE_NONE, PARAM_INT); // Used to calculate the aggregate to return.
  41
  42 $result = new stdClass;
  43
  44 // If session has expired and its an ajax request so we cant do a page redirect.
  45 if (!isloggedin()) {
  46     $result->error = get_string('sessionerroruser', 'error');
  47     echo json_encode($result);
  48     die();
  49 }
  50
  51 list($context, $course, $cm) = get_context_info_array($contextid);
  52 require_login($course, false, $cm);
  53
  54 $contextid = null; // Now we have a context object, throw away the id from the user.
  55 $PAGE->set_context($context);
  56 $PAGE->set_url('/rating/rate_ajax.php', array('contextid' => $context->id));
  57
  58 if (!confirm_sesskey() || !has_capability('moodle/rating:rate', $context)) {
  59     echo $OUTPUT->header();
  60     echo get_string('ratepermissiondenied', 'rating');
  61     echo $OUTPUT->footer();
  62     die();
  63 }
  64
  65 $rm = new rating_manager();
  66 $result = $rm->add_rating($cm, $context, $component, $ratingarea, $itemid, $scaleid, $userrating, $rateduserid, $aggregationmethod);
  67
  68 // Return translated error.
  69 if (!empty($result->error)) {
  70     $result->error = get_string($result->error, 'rating');
  71 }
  72
  73 echo json_encode($result);