course/rest.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  * Provide interface for topics AJAX course formats
  20  *
  21  * @copyright 1999 Martin Dougiamas  http://dougiamas.com
  22  * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23  * @package course
  24  */
  25
  26 if (!defined('AJAX_SCRIPT')) {
  27     define('AJAX_SCRIPT', true);
  28 }
  29 require_once(dirname(__FILE__) . '/../config.php');
  30 require_once($CFG->dirroot.'/course/lib.php');
  31
  32 // Initialise ALL the incoming parameters here, up front.
  33 $courseid   = required_param('courseId', PARAM_INT);
  34 $class      = required_param('class', PARAM_ALPHA);
  35 $field      = optional_param('field', '', PARAM_ALPHA);
  36 $instanceid = optional_param('instanceId', 0, PARAM_INT);
  37 $sectionid  = optional_param('sectionId', 0, PARAM_INT);
  38 $beforeid   = optional_param('beforeId', 0, PARAM_INT);
  39 $value      = optional_param('value', 0, PARAM_INT);
  40 $column     = optional_param('column', 0, PARAM_ALPHA);
  41 $id         = optional_param('id', 0, PARAM_INT);
  42 $summary    = optional_param('summary', '', PARAM_RAW);
  43 $sequence   = optional_param('sequence', '', PARAM_SEQUENCE);
  44 $visible    = optional_param('visible', 0, PARAM_INT);
  45 $pageaction = optional_param('action', '', PARAM_ALPHA); // Used to simulate a DELETE command
  46 $title      = optional_param('title', '', PARAM_TEXT);
  47
  48 $PAGE->set_url('/course/rest.php', array('courseId'=>$courseid,'class'=>$class));
  49
  50 //NOTE: when making any changes here please make sure it is using the same access control as course/mod.php !!
  51
  52 $course = $DB->get_record('course', array('id' => $courseid), '*', MUST_EXIST);
  53 // Check user is logged in and set contexts if we are dealing with resource
  54 if (in_array($class, array('resource'))) {
  55     $cm = get_coursemodule_from_id(null, $id, $course->id, false, MUST_EXIST);
  56     require_login($course, false, $cm);
  57     $modcontext = get_context_instance(CONTEXT_MODULE, $cm->id);
  58 } else {
  59     require_login($course);
  60 }
  61 $coursecontext = get_context_instance(CONTEXT_COURSE, $course->id);
  62 require_sesskey();
  63
  64 echo $OUTPUT->header(); // send headers
  65
  66 // OK, now let's process the parameters and do stuff
  67 // MDL-10221 the DELETE method is not allowed on some web servers, so we simulate it with the action URL param
  68 $requestmethod = $_SERVER['REQUEST_METHOD'];
  69 if ($pageaction == 'DELETE') {
  70     $requestmethod = 'DELETE';
  71 }
  72
  73 switch($requestmethod) {
  74     case 'POST':
  75
  76         switch ($class) {
  77             case 'section':
  78
  79                 if (!$DB->record_exists('course_sections', array('course'=>$course->id, 'section'=>$id))) {
  80                     throw new moodle_exception('AJAX commands.php: Bad Section ID '.$id);
  81                 }
  82
  83                 switch ($field) {
  84                     case 'visible':
  85                         require_capability('moodle/course:sectionvisibility', $coursecontext);
  86                         $resourcestotoggle = set_section_visible($course->id, $id, $value);
  87                         echo json_encode(array('resourcestotoggle' => $resourcestotoggle));
  88                         break;
  89
  90                     case 'move':
  91                         require_capability('moodle/course:update', $coursecontext);
  92                         move_section_to($course, $id, $value);
  93                         // See if format wants to do something about it
  94                         $libfile = $CFG->dirroot.'/course/format/'.$course->format.'/lib.php';
  95                         $functionname = 'callback_'.$course->format.'_ajax_section_move';
  96                         if (!function_exists($functionname) && file_exists($libfile)) {
  97                             require_once $libfile;
  98                         }
  99                         if (function_exists($functionname)) {
 100                             echo json_encode($functionname($course));
 101                         }
 102                         break;
 103                 }
 104                 rebuild_course_cache($course->id);
 105                 break;
 106
 107             case 'resource':
 108                 switch ($field) {
 109                     case 'visible':
 110                         require_capability('moodle/course:activityvisibility', $modcontext);
 111                         set_coursemodule_visible($cm->id, $value);
 112                         break;
 113
 114                     case 'groupmode':
 115                         require_capability('moodle/course:manageactivities', $modcontext);
 116                         set_coursemodule_groupmode($cm->id, $value);
 117                         break;
 118
 119                     case 'indent':
 120                         require_capability('moodle/course:manageactivities', $modcontext);
 121                         $cm->indent = $value;
 122                         if ($cm->indent >= 0) {
 123                             $DB->update_record('course_modules', $cm);
 124                         }
 125                         break;
 126
 127                     case 'move':
 128                         require_capability('moodle/course:manageactivities', $modcontext);
 129                         if (!$section = $DB->get_record('course_sections', array('course'=>$course->id, 'section'=>$sectionid))) {
 130                             throw new moodle_exception('AJAX commands.php: Bad section ID '.$sectionid);
 131                         }
 132
 133                         if ($beforeid > 0){
 134                             $beforemod = get_coursemodule_from_id('', $beforeid, $course->id);
 135                             $beforemod = $DB->get_record('course_modules', array('id'=>$beforeid));
 136                         } else {
 137                             $beforemod = NULL;
 138                         }
 139
 140                         moveto_module($cm, $section, $beforemod);
 141                         break;
 142                     case 'gettitle':
 143                         require_capability('moodle/course:manageactivities', $modcontext);
 144                         $cm = get_coursemodule_from_id('', $id, 0, false, MUST_EXIST);
 145                         $module = new stdClass();
 146                         $module->id = $cm->instance;
 147
 148                         // Don't pass edit strings through multilang filters - we need the entire string
 149                         echo json_encode(array('instancename' => $cm->name));
 150                         break;
 151                     case 'updatetitle':
 152                         require_capability('moodle/course:manageactivities', $modcontext);
 153                         $cm = get_coursemodule_from_id('', $id, 0, false, MUST_EXIST);
 154                         $module = new stdClass();
 155                         $module->id = $cm->instance;
 156
 157                         // Escape strings as they would be by mform
 158                         if (!empty($CFG->formatstringstriptags)) {
 159                             $module->name = clean_param($title, PARAM_TEXT);
 160                         } else {
 161                             $module->name = clean_param($title, PARAM_CLEANHTML);
 162                         }
 163
 164                         if (!empty($module->name)) {
 165                             $DB->update_record($cm->modname, $module);
 166                         } else {
 167                             $module->name = $cm->name;
 168                         }
 169
 170                         // We need to return strings after they've been through filters for multilang
 171                         $stringoptions = new stdClass;
 172                         $stringoptions->context = $coursecontext;
 173                         echo json_encode(array('instancename' => format_string($module->name, true,  $stringoptions)));
 174                         break;
 175                 }
 176                 rebuild_course_cache($course->id);
 177                 break;
 178
 179             case 'course':
 180                 switch($field) {
 181                     case 'marker':
 182                         require_capability('moodle/course:setcurrentsection', $coursecontext);
 183                         course_set_marker($course->id, $value);
 184                         break;
 185                 }
 186                 break;
 187         }
 188         break;
 189
 190     case 'DELETE':
 191         switch ($class) {
 192             case 'resource':
 193                 require_capability('moodle/course:manageactivities', $modcontext);
 194                 $modlib = "$CFG->dirroot/mod/$cm->modname/lib.php";
 195
 196                 if (file_exists($modlib)) {
 197                     include_once($modlib);
 198                 } else {
 199                     throw new moodle_exception("Ajax rest.php: This module is missing mod/$cm->modname/lib.php");
 200                 }
 201                 $deleteinstancefunction = $cm->modname."_delete_instance";
 202
 203                 // Run the module's cleanup funtion.
 204                 if (!$deleteinstancefunction($cm->instance)) {
 205                     throw new moodle_exception("Ajax rest.php: Could not delete the $cm->modname $cm->name (instance)");
 206                     die;
 207                 }
 208
 209                 // remove all module files in case modules forget to do that
 210                 $fs = get_file_storage();
 211                 $fs->delete_area_files($modcontext->id);
 212
 213                 if (!delete_course_module($cm->id)) {
 214                     throw new moodle_exception("Ajax rest.php: Could not delete the $cm->modname $cm->name (coursemodule)");
 215                 }
 216                 // Remove the course_modules entry.
 217                 if (!delete_mod_from_section($cm->id, $cm->section)) {
 218                     throw new moodle_exception("Ajax rest.php: Could not delete the $cm->modname $cm->name from section");
 219                 }
 220
 221                 // Trigger a mod_deleted event with information about this module.
 222                 $eventdata = new stdClass();
 223                 $eventdata->modulename = $cm->modname;
 224                 $eventdata->cmid       = $cm->id;
 225                 $eventdata->courseid   = $course->id;
 226                 $eventdata->userid     = $USER->id;
 227                 events_trigger('mod_deleted', $eventdata);
 228
 229                 rebuild_course_cache($course->id);
 230
 231                 add_to_log($courseid, "course", "delete mod",
 232                            "view.php?id=$courseid",
 233                            "$cm->modname $cm->instance", $cm->id);
 234                 break;
 235         }
 236         break;
 237 }