blocks/community/locallib.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  * Community library
  19  *
  20  * @package    block_community
  21  * @author     Jerome Mouneyrac <jerome@mouneyrac.com>
  22  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL
  23  * @copyright  (C) 1999 onwards Martin Dougiamas  http://dougiamas.com
  24  *
  25  *
  26  */
  27
  28 class block_community_manager {
  29
  30     /**
  31      * Add a community course
  32      * @param object $course
  33      * @param integer $userid
  34      * @return id of course or false if already added
  35      */
  36     public function block_community_add_course($course, $userid) {
  37         global $DB;
  38
  39         $community = $this->block_community_get_course($course->url, $userid);
  40
  41         if (empty($community)) {
  42             $community = new stdClass();
  43             $community->userid = $userid;
  44             $community->coursename = $course->name;
  45             $community->coursedescription = $course->description;
  46             $community->courseurl = $course->url;
  47             $community->imageurl = $course->imageurl;
  48             return $DB->insert_record('block_community', $community);
  49         } else {
  50             return false;
  51         }
  52     }
  53
  54     /**
  55      * Return all community courses of a user
  56      * @param integer $userid
  57      * @return array of course
  58      */
  59     public function block_community_get_courses($userid) {
  60         global $DB;
  61         return $DB->get_records('block_community', array('userid' => $userid), 'coursename');
  62     }
  63
  64     /**
  65      * Return a community courses of a user
  66      * @param integer $userid
  67      * @param integer $userid
  68      * @return array of course
  69      */
  70     public function block_community_get_course($courseurl, $userid) {
  71         global $DB;
  72         return $DB->get_record('block_community',
  73                 array('courseurl' => $courseurl, 'userid' => $userid));
  74     }
  75
  76     /**
  77      * Download the community course backup and save it in file API
  78      * @param integer $courseid
  79      * @param string $huburl
  80      * @return array 'privatefile' the file name saved in private area
  81      *               'tmpfile' the file name saved in the moodledata temp dir (for restore)
  82      */
  83     public function block_community_download_course_backup($course) {
  84         global $CFG, $USER;
  85         require_once($CFG->libdir . "/filelib.php");
  86         require_once($CFG->dirroot. "/course/publish/lib.php");
  87
  88         $params['courseid'] = $course->id;
  89         $params['filetype'] = HUB_BACKUP_FILE_TYPE;
  90
  91         make_temp_directory('backup');
  92
  93         $filename = md5(time() . '-' . $course->id . '-'. $USER->id . '-'. random_string(20));
  94
  95         $url  = new moodle_url($course->huburl.'/local/hub/webservice/download.php', $params);
  96         $path = $CFG->tempdir.'/backup/'.$filename.".mbz";
  97         $fp = fopen($path, 'w');
  98         $curlurl = $course->huburl.'/local/hub/webservice/download.php?filetype='
  99                 .HUB_BACKUP_FILE_TYPE.'&courseid='.$course->id;
 100
 101         //send an identification token if the site is registered on the hub
 102         require_once($CFG->dirroot . '/' . $CFG->admin . '/registration/lib.php');
 103         $registrationmanager = new registration_manager();
 104         $registeredhub = $registrationmanager->get_registeredhub($course->huburl);
 105         if (!empty($registeredhub)) {
 106             $token = $registeredhub->token;
 107             $curlurl .= '&token='.$token;
 108         }
 109
 110         $ch = curl_init($curlurl);
 111         curl_setopt($ch, CURLOPT_FILE, $fp);
 112         $data = curl_exec($ch);
 113         curl_close($ch);
 114         fclose($fp);
 115
 116         $fs = get_file_storage();
 117         $record = new stdClass();
 118         $record->contextid = context_user::instance($USER->id)->id;
 119         $record->component = 'user';
 120         $record->filearea = 'private';
 121         $record->itemid = 0;
 122         $record->filename = urlencode($course->fullname)."_".time().".mbz";
 123         $record->filepath = '/downloaded_backup/';
 124         if (!$fs->file_exists($record->contextid, $record->component,
 125                 $record->filearea, 0, $record->filepath, $record->filename)) {
 126             $fs->create_file_from_pathname($record,
 127                     $CFG->tempdir.'/backup/'.$filename.".mbz");
 128         }
 129
 130         $filenames = array();
 131         $filenames['privatefile'] = $record->filename;
 132         $filenames['tmpfile'] = $filename;
 133         return $filenames;
 134     }
 135
 136     /**
 137      * Delete a community course
 138      * @param integer $communityid
 139      * @param integer $userid
 140      * @return bool true
 141      */
 142     public function block_community_remove_course($communityid, $userid) {
 143         global $DB, $USER;
 144         return $DB->delete_records('block_community',
 145                 array('userid' => $userid, 'id' => $communityid));
 146     }
 147
 148 }