blocks/community/communitycourse.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  * @package    blocks
  20  * @subpackage 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  * This page display the community course search form.
  26  * It also handles adding a course to the community block.
  27  * It also handles downloading a course template.
  28  */
  29
  30 require('../../config.php');
  31 require_once($CFG->dirroot . '/blocks/community/locallib.php');
  32 require_once($CFG->dirroot . '/blocks/community/forms.php');
  33 require_once($CFG->dirroot . '/' . $CFG->admin . '/registration/lib.php');
  34
  35 require_login();
  36
  37 $courseid = optional_param('courseid', $SITE->id, PARAM_INT); //if no courseid is given
  38 $context = get_context_instance(CONTEXT_COURSE, $courseid);
  39
  40 $PAGE->set_context($context);
  41 $PAGE->set_url('/blocks/community/communitycourse.php');
  42 $PAGE->set_heading($SITE->fullname);
  43 $PAGE->set_pagelayout('course');
  44 $PAGE->set_title(get_string('searchcourse', 'block_community'));
  45 $PAGE->navbar->ignore_active(true);
  46 $PAGE->navbar->add(get_string('searchcourse', 'block_community'));
  47
  48 $search = optional_param('search', null, PARAM_TEXT);
  49
  50 //if no capability to search course, display an error message
  51 $usercansearch = has_capability('moodle/community:add', $context);
  52 $usercandownload = has_capability('moodle/community:download', $context);
  53 if (empty($usercansearch)) {
  54     $notificationerror = get_string('cannotsearchcommunity', 'hub');
  55 } else if (!extension_loaded('xmlrpc')) {
  56     $notificationerror = $OUTPUT->doc_link('admin/environment/php_extension/xmlrpc', '');
  57     $notificationerror .= get_string('xmlrpcdisabledcommunity', 'hub');
  58 }
  59 if (!empty($notificationerror)) {
  60     echo $OUTPUT->header();
  61     echo $OUTPUT->heading(get_string('searchcommunitycourse', 'block_community'), 3, 'main');
  62     echo $OUTPUT->notification($notificationerror);
  63     echo $OUTPUT->footer();
  64     die();
  65 }
  66
  67 $communitymanager = new block_community_manager();
  68 $renderer = $PAGE->get_renderer('block_community');
  69
  70 /// Check if the page has been called with trust argument
  71 $add = optional_param('add', -1, PARAM_INTEGER);
  72 $confirm = optional_param('confirmed', false, PARAM_INTEGER);
  73 if ($add != -1 and $confirm and confirm_sesskey()) {
  74     $course = new stdClass();
  75     $course->name = optional_param('coursefullname', '', PARAM_TEXT);
  76     $course->description = optional_param('coursedescription', '', PARAM_TEXT);
  77     $course->url = optional_param('courseurl', '', PARAM_URL);
  78     $course->imageurl = optional_param('courseimageurl', '', PARAM_URL);
  79     $communitymanager->block_community_add_course($course, $USER->id);
  80     $notificationmessage = $OUTPUT->notification(get_string('addedtoblock', 'hub'),
  81                     'notifysuccess');
  82 }
  83
  84 /// Delete temp file when cancel restore
  85 $cancelrestore = optional_param('cancelrestore', false, PARAM_INT);
  86 if ($usercandownload and $cancelrestore and confirm_sesskey()) {
  87     $filename = optional_param('filename', '', PARAM_ALPHANUMEXT);
  88     //delete temp file
  89     unlink($CFG->dataroot . '/temp/backup/' . $filename . ".mbz");
  90 }
  91
  92 /// Download
  93 $huburl = optional_param('huburl', false, PARAM_URL);
  94 $download = optional_param('download', -1, PARAM_INTEGER);
  95 $downloadcourseid = optional_param('downloadcourseid', '', PARAM_INTEGER);
  96 $coursefullname = optional_param('coursefullname', '', PARAM_ALPHANUMEXT);
  97 $backupsize = optional_param('backupsize', 0, PARAM_INT);
  98 if ($usercandownload and $download != -1 and !empty($downloadcourseid) and confirm_sesskey()) {
  99     $course = new stdClass();
 100     $course->fullname = $coursefullname;
 101     $course->id = $downloadcourseid;
 102     $course->huburl = $huburl;
 103
 104     //OUTPUT: display restore choice page
 105     echo $OUTPUT->header();
 106     echo $OUTPUT->heading(get_string('downloadingcourse', 'block_community'), 3, 'main');
 107     echo html_writer::tag('div', get_string('downloading', 'block_community'),
 108             array('class' => 'textinfo'));
 109     $sizeinfo = new stdClass();
 110     $sizeinfo->total = $backupsize / 1000000;
 111     $sizeinfo->modem = (int) ($backupsize / 5000);
 112     $sizeinfo->dsl = (int) $sizeinfo->total;
 113     echo html_writer::tag('div', get_string('downloadingsize', 'block_community', $sizeinfo),
 114             array('class' => 'textinfo'));
 115     flush();
 116     echo html_writer::tag('div', get_string('downloaded', 'block_community'),
 117             array('class' => 'textinfo'));
 118     $filenames = $communitymanager->block_community_download_course_backup($course);
 119     echo $OUTPUT->notification(get_string('downloadconfirmed', 'block_community',
 120                     '/downloaded_backup/' . $filenames['privatefile']), 'notifysuccess');
 121     echo $renderer->restore_confirmation_box($filenames['tmpfile'], $context);
 122     echo $OUTPUT->footer();
 123     die();
 124 }
 125
 126 /// Remove community
 127 $remove = optional_param('remove', '', PARAM_INTEGER);
 128 $communityid = optional_param('communityid', '', PARAM_INTEGER);
 129 if ($remove != -1 and !empty($communityid) and confirm_sesskey()) {
 130     $communitymanager->block_community_remove_course($communityid, $USER->id);
 131     $notificationmessage = $OUTPUT->notification(get_string('communityremoved', 'hub'),
 132                     'notifysuccess');
 133 }
 134
 135 //Get form default/current values
 136 $fromformdata['coverage'] = optional_param('coverage', 'all', PARAM_TEXT);
 137 $fromformdata['licence'] = optional_param('licence', 'all', PARAM_ALPHANUMEXT);
 138 $fromformdata['subject'] = optional_param('subject', 'all', PARAM_ALPHANUMEXT);
 139 $fromformdata['audience'] = optional_param('audience', 'all', PARAM_ALPHANUMEXT);
 140 $fromformdata['language'] = optional_param('language', 'all', PARAM_ALPHANUMEXT);
 141 $fromformdata['educationallevel'] = optional_param('educationallevel', 'all', PARAM_ALPHANUMEXT);
 142 $fromformdata['downloadable'] = optional_param('downloadable', 0, PARAM_ALPHANUM);
 143 $fromformdata['orderby'] = optional_param('orderby', 'newest', PARAM_ALPHA);
 144 $fromformdata['huburl'] = optional_param('huburl', HUB_MOODLEORGHUBURL, PARAM_URL);
 145 $fromformdata['search'] = $search;
 146 $fromformdata['courseid'] = $courseid;
 147 $hubselectorform = new community_hub_search_form('', $fromformdata);
 148 $hubselectorform->set_data($fromformdata);
 149
 150 //Retrieve courses by web service
 151 $courses = null;
 152 if (optional_param('executesearch', 0, PARAM_INTEGER) and confirm_sesskey()) {
 153     $downloadable = optional_param('downloadable', false, PARAM_INTEGER);
 154
 155     $options = new stdClass();
 156     if (!empty($fromformdata['coverage'])) {
 157         $options->coverage = $fromformdata['coverage'];
 158     }
 159     if ($fromformdata['licence'] != 'all') {
 160         $options->licenceshortname = $fromformdata['licence'];
 161     }
 162     if ($fromformdata['subject'] != 'all') {
 163         $options->subject = $fromformdata['subject'];
 164     }
 165     if ($fromformdata['audience'] != 'all') {
 166         $options->audience = $fromformdata['audience'];
 167     }
 168     if ($fromformdata['educationallevel'] != 'all') {
 169         $options->educationallevel = $fromformdata['educationallevel'];
 170     }
 171     if ($fromformdata['language'] != 'all') {
 172         $options->language = $fromformdata['language'];
 173     }
 174
 175     $options->orderby = $fromformdata['orderby'];
 176
 177     //the range of course requested
 178     $options->givememore = optional_param('givememore', 0, PARAM_INTEGER);
 179
 180     //check if the selected hub is from the registered list (in this case we use the private token)
 181     $token = 'publichub';
 182     $registrationmanager = new registration_manager();
 183     $registeredhubs = $registrationmanager->get_registered_on_hubs();
 184     foreach ($registeredhubs as $registeredhub) {
 185         if ($huburl == $registeredhub->huburl) {
 186             $token = $registeredhub->token;
 187         }
 188     }
 189
 190     $function = 'hub_get_courses';
 191     $params = array('search' => $search, 'downloadable' => $downloadable,
 192         'enrollable' => !$downloadable, 'options' => $options);
 193     $serverurl = $huburl . "/local/hub/webservice/webservices.php";
 194     require_once($CFG->dirroot . "/webservice/xmlrpc/lib.php");
 195     $xmlrpcclient = new webservice_xmlrpc_client($serverurl, $token);
 196     try {
 197         $result = $xmlrpcclient->call($function, $params);
 198         $courses = $result['courses'];
 199         $coursetotal = $result['coursetotal'];
 200     } catch (Exception $e) {
 201         $errormessage = $OUTPUT->notification(
 202                         get_string('errorcourselisting', 'block_community', $e->getMessage()));
 203     }
 204 }
 205
 206 // OUTPUT
 207 echo $OUTPUT->header();
 208 echo $OUTPUT->heading(get_string('searchcommunitycourse', 'block_community'), 3, 'main');
 209 if (!empty($notificationmessage)) {
 210     echo $notificationmessage;
 211 }
 212 $hubselectorform->display();
 213 if (!empty($errormessage)) {
 214     echo $errormessage;
 215 }
 216
 217 //load javascript
 218 $courseids = array();
 219 if (!empty($courses)) {
 220     foreach ($courses as $course) {
 221         if (!empty($course['comments'])) {
 222             $courseids[] = $course['id'];
 223         }
 224     }
 225 }
 226 $PAGE->requires->yui_module('moodle-block_community-comments', 'M.blocks_community.init_comments',
 227         array(array('commentids' => $courseids)));
 228
 229 echo highlight($search, $renderer->course_list($courses, $huburl, $courseid));
 230
 231 //display givememore/Next link if more course can be displayed
 232 if (!empty($courses)) {
 233     if (($options->givememore + count($courses)) < $coursetotal) {
 234         $fromformdata['givememore'] = count($courses) + $options->givememore;
 235         $fromformdata['executesearch'] = true;
 236         $fromformdata['sesskey'] = sesskey();
 237         echo $renderer->next_button($fromformdata);
 238     }
 239 }
 240
 241 echo $OUTPUT->footer();