comment/comment_ajax.php

   1 <?php
   2
   3 // This file is part of Moodle - http://moodle.org/
   4 //
   5 // Moodle is free software: you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation, either version 3 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // Moodle is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 /*
  19  * Handling all ajax request for comments API
  20  */
  21 define('AJAX_SCRIPT', true);
  22
  23 require_once('../config.php');
  24 require_once($CFG->dirroot . '/comment/lib.php');
  25
  26 $contextid = optional_param('contextid', SYSCONTEXTID, PARAM_INT);
  27 list($context, $course, $cm) = get_context_info_array($contextid);
  28
  29 $PAGE->set_context($context);
  30 $PAGE->set_url('/comment/comment_ajax.php');
  31
  32 $action = optional_param('action', '', PARAM_ALPHA);
  33
  34 if (!confirm_sesskey()) {
  35     $error = array('error'=>get_string('invalidsesskey'));
  36     die(json_encode($error));
  37 }
  38
  39 if (!isloggedin()) {
  40     // display comments on front page without permission check
  41     if ($action == 'get') {
  42         if ($context->id == get_context_instance(CONTEXT_COURSE, SITEID)->id) {
  43             $ignore_permission = true;
  44         } else {
  45             // tell user to log in to view comments
  46             $ignore_permission = false;
  47             echo json_encode(array('error'=>'require_login'));
  48             die;
  49         }
  50     } else {
  51         // ignore request
  52         die;
  53     }
  54 } else {
  55     $ignore_permission = false;
  56 }
  57
  58 $area      = optional_param('area',      '', PARAM_ALPHAEXT);
  59 $client_id = optional_param('client_id', '', PARAM_RAW);
  60 $commentid = optional_param('commentid', -1, PARAM_INT);
  61 $content   = optional_param('content',   '', PARAM_RAW);
  62 $itemid    = optional_param('itemid',    '', PARAM_INT);
  63 $page      = optional_param('page',      0,  PARAM_INT);
  64 $component = optional_param('component', '',  PARAM_ALPHAEXT);
  65
  66 echo $OUTPUT->header(); // send headers
  67
  68 // initilising comment object
  69 if (!empty($client_id)) {
  70     $args = new stdClass();
  71     $args->context   = $context;
  72     $args->course    = $course;
  73     $args->cm        = $cm;
  74     $args->area      = $area;
  75     $args->itemid    = $itemid;
  76     $args->client_id = $client_id;
  77     $args->component = $component;
  78     // only for comments in frontpage
  79     $args->ignore_permission = $ignore_permission;
  80     $manager = new comment($args);
  81 } else {
  82     die;
  83 }
  84
  85 // process ajax request
  86 switch ($action) {
  87     case 'add':
  88         $result = $manager->add($content);
  89         if (!empty($result) && is_object($result)) {
  90             $result->count = $manager->count();
  91             $result->client_id = $client_id;
  92             echo json_encode($result);
  93         }
  94         break;
  95     case 'delete':
  96         $result = $manager->delete($commentid);
  97         if ($result === true) {
  98             echo json_encode(array('client_id'=>$client_id, 'commentid'=>$commentid));
  99         }
 100         break;
 101     case 'get':
 102     default:
 103         $result = array();
 104         $comments = $manager->get_comments($page);
 105         $result['list'] = $comments;
 106         $result['count'] = $manager->count();
 107         $result['pagination'] = $manager->get_pagination($page);
 108         $result['client_id']  = $client_id;
 109         echo json_encode($result);
 110 }