course/lib.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  * Library of useful functions
  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 core
  24  * @subpackage course
  25  */
  26
  27 defined('MOODLE_INTERNAL') || die;
  28
  29 require_once($CFG->libdir.'/completionlib.php');
  30 require_once($CFG->libdir.'/filelib.php');
  31
  32 define('COURSE_MAX_LOG_DISPLAY', 150);          // days
  33 define('COURSE_MAX_LOGS_PER_PAGE', 1000);       // records
  34 define('COURSE_LIVELOG_REFRESH', 60);           // Seconds
  35 define('COURSE_MAX_RECENT_PERIOD', 172800);     // Two days, in seconds
  36 define('COURSE_MAX_SUMMARIES_PER_PAGE', 10);    // courses
  37 define('COURSE_MAX_COURSES_PER_DROPDOWN',1000); //  max courses in log dropdown before switching to optional
  38 define('COURSE_MAX_USERS_PER_DROPDOWN',1000);   //  max users in log dropdown before switching to optional
  39 define('FRONTPAGENEWS',           '0');
  40 define('FRONTPAGECOURSELIST',     '1');
  41 define('FRONTPAGECATEGORYNAMES',  '2');
  42 define('FRONTPAGETOPICONLY',      '3');
  43 define('FRONTPAGECATEGORYCOMBO',  '4');
  44 define('FRONTPAGECOURSELIMIT',    200);         // maximum number of courses displayed on the frontpage
  45 define('EXCELROWS', 65535);
  46 define('FIRSTUSEDEXCELROW', 3);
  47
  48 define('MOD_CLASS_ACTIVITY', 0);
  49 define('MOD_CLASS_RESOURCE', 1);
  50
  51 function make_log_url($module, $url) {
  52     switch ($module) {
  53         case 'course':
  54         case 'file':
  55         case 'login':
  56         case 'lib':
  57         case 'admin':
  58         case 'calendar':
  59         case 'mnet course':
  60             if (strpos($url, '../') === 0) {
  61                 $url = ltrim($url, '.');
  62             } else {
  63                 $url = "/course/$url";
  64             }
  65             break;
  66         case 'user':
  67         case 'blog':
  68             $url = "/$module/$url";
  69             break;
  70         case 'upload':
  71             $url = $url;
  72             break;
  73         case 'coursetags':
  74             $url = '/'.$url;
  75             break;
  76         case 'library':
  77         case '':
  78             $url = '/';
  79             break;
  80         case 'message':
  81             $url = "/message/$url";
  82             break;
  83         case 'notes':
  84             $url = "/notes/$url";
  85             break;
  86         case 'tag':
  87             $url = "/tag/$url";
  88             break;
  89         case 'role':
  90             $url = '/'.$url;
  91             break;
  92         default:
  93             $url = "/mod/$module/$url";
  94             break;
  95     }
  96
  97     //now let's sanitise urls - there might be some ugly nasties:-(
  98     $parts = explode('?', $url);
  99     $script = array_shift($parts);
 100     if (strpos($script, 'http') === 0) {
 101         $script = clean_param($script, PARAM_URL);
 102     } else {
 103         $script = clean_param($script, PARAM_PATH);
 104     }
 105
 106     $query = '';
 107     if ($parts) {
 108         $query = implode('', $parts);
 109         $query = str_replace('&amp;', '&', $query); // both & and &amp; are stored in db :-|
 110         $parts = explode('&', $query);
 111         $eq = urlencode('=');
 112         foreach ($parts as $key=>$part) {
 113             $part = urlencode(urldecode($part));
 114             $part = str_replace($eq, '=', $part);
 115             $parts[$key] = $part;
 116         }
 117         $query = '?'.implode('&amp;', $parts);
 118     }
 119
 120     return $script.$query;
 121 }
 122
 123
 124 function build_mnet_logs_array($hostid, $course, $user=0, $date=0, $order="l.time ASC", $limitfrom='', $limitnum='',
 125                    $modname="", $modid=0, $modaction="", $groupid=0) {
 126     global $CFG, $DB;
 127
 128     // It is assumed that $date is the GMT time of midnight for that day,
 129     // and so the next 86400 seconds worth of logs are printed.
 130
 131     /// Setup for group handling.
 132
 133     // TODO: I don't understand group/context/etc. enough to be able to do
 134     // something interesting with it here
 135     // What is the context of a remote course?
 136
 137     /// If the group mode is separate, and this user does not have editing privileges,
 138     /// then only the user's group can be viewed.
 139     //if ($course->groupmode == SEPARATEGROUPS and !has_capability('moodle/course:managegroups', get_context_instance(CONTEXT_COURSE, $course->id))) {
 140     //    $groupid = get_current_group($course->id);
 141     //}
 142     /// If this course doesn't have groups, no groupid can be specified.
 143     //else if (!$course->groupmode) {
 144     //    $groupid = 0;
 145     //}
 146
 147     $groupid = 0;
 148
 149     $joins = array();
 150
 151     $qry = "SELECT l.*, u.firstname, u.lastname, u.picture
 152               FROM {mnet_log} l
 153                LEFT JOIN {user} u ON l.userid = u.id
 154               WHERE ";
 155     $params = array();
 156
 157     $where .= "l.hostid = :hostid";
 158     $params['hostid'] = $hostid;
 159
 160     // TODO: Is 1 really a magic number referring to the sitename?
 161     if ($course != SITEID || $modid != 0) {
 162         $where .= " AND l.course=:courseid";
 163         $params['courseid'] = $course;
 164     }
 165
 166     if ($modname) {
 167         $where .= " AND l.module = :modname";
 168         $params['modname'] = $modname;
 169     }
 170
 171     if ('site_errors' === $modid) {
 172         $where .= " AND ( l.action='error' OR l.action='infected' )";
 173     } else if ($modid) {
 174         //TODO: This assumes that modids are the same across sites... probably
 175         //not true
 176         $where .= " AND l.cmid = :modid";
 177         $params['modid'] = $modid;
 178     }
 179
 180     if ($modaction) {
 181         $firstletter = substr($modaction, 0, 1);
 182         if ($firstletter == '-') {
 183             $where .= " AND ".$DB->sql_like('l.action', ':modaction', false, true, true);
 184             $params['modaction'] = '%'.substr($modaction, 1).'%';
 185         } else {
 186             $where .= " AND ".$DB->sql_like('l.action', ':modaction', false);
 187             $params['modaction'] = '%'.$modaction.'%';
 188         }
 189     }
 190
 191     if ($user) {
 192         $where .= " AND l.userid = :user";
 193         $params['user'] = $user;
 194     }
 195
 196     if ($date) {
 197         $enddate = $date + 86400;
 198         $where .= " AND l.time > :date AND l.time < :enddate";
 199         $params['date'] = $date;
 200         $params['enddate'] = $enddate;
 201     }
 202
 203     $result = array();
 204     $result['totalcount'] = $DB->count_records_sql("SELECT COUNT('x') FROM {mnet_log} l WHERE $where", $params);
 205     if(!empty($result['totalcount'])) {
 206         $where .= " ORDER BY $order";
 207         $result['logs'] = $DB->get_records_sql("$qry $where", $params, $limitfrom, $limitnum);
 208     } else {
 209         $result['logs'] = array();
 210     }
 211     return $result;
 212 }
 213
 214 function build_logs_array($course, $user=0, $date=0, $order="l.time ASC", $limitfrom='', $limitnum='',
 215                    $modname="", $modid=0, $modaction="", $groupid=0) {
 216     global $DB, $SESSION, $USER;
 217     // It is assumed that $date is the GMT time of midnight for that day,
 218     // and so the next 86400 seconds worth of logs are printed.
 219
 220     /// Setup for group handling.
 221
 222     /// If the group mode is separate, and this user does not have editing privileges,
 223     /// then only the user's group can be viewed.
 224     if ($course->groupmode == SEPARATEGROUPS and !has_capability('moodle/course:managegroups', get_context_instance(CONTEXT_COURSE, $course->id))) {
 225         if (isset($SESSION->currentgroup[$course->id])) {
 226             $groupid =  $SESSION->currentgroup[$course->id];
 227         } else {
 228             $groupid = groups_get_all_groups($course->id, $USER->id);
 229             if (is_array($groupid)) {
 230                 $groupid = array_shift(array_keys($groupid));
 231                 $SESSION->currentgroup[$course->id] = $groupid;
 232             } else {
 233                 $groupid = 0;
 234             }
 235         }
 236     }
 237     /// If this course doesn't have groups, no groupid can be specified.
 238     else if (!$course->groupmode) {
 239         $groupid = 0;
 240     }
 241
 242     $joins = array();
 243     $params = array();
 244
 245     if ($course->id != SITEID || $modid != 0) {
 246         $joins[] = "l.course = :courseid";
 247         $params['courseid'] = $course->id;
 248     }
 249
 250     if ($modname) {
 251         $joins[] = "l.module = :modname";
 252         $params['modname'] = $modname;
 253     }
 254
 255     if ('site_errors' === $modid) {
 256         $joins[] = "( l.action='error' OR l.action='infected' )";
 257     } else if ($modid) {
 258         $joins[] = "l.cmid = :modid";
 259         $params['modid'] = $modid;
 260     }
 261
 262     if ($modaction) {
 263         $firstletter = substr($modaction, 0, 1);
 264         if ($firstletter == '-') {
 265             $joins[] = $DB->sql_like('l.action', ':modaction', false, true, true);
 266             $params['modaction'] = '%'.substr($modaction, 1).'%';
 267         } else {
 268             $joins[] = $DB->sql_like('l.action', ':modaction', false);
 269             $params['modaction'] = '%'.$modaction.'%';
 270         }
 271     }
 272
 273
 274     /// Getting all members of a group.
 275     if ($groupid and !$user) {
 276         if ($gusers = groups_get_members($groupid)) {
 277             $gusers = array_keys($gusers);
 278             $joins[] = 'l.userid IN (' . implode(',', $gusers) . ')';
 279         } else {
 280             $joins[] = 'l.userid = 0'; // No users in groups, so we want something that will always be false.
 281         }
 282     }
 283     else if ($user) {
 284         $joins[] = "l.userid = :userid";
 285         $params['userid'] = $user;
 286     }
 287
 288     if ($date) {
 289         $enddate = $date + 86400;
 290         $joins[] = "l.time > :date AND l.time < :enddate";
 291         $params['date'] = $date;
 292         $params['enddate'] = $enddate;
 293     }
 294
 295     $selector = implode(' AND ', $joins);
 296
 297     $totalcount = 0;  // Initialise
 298     $result = array();
 299     $result['logs'] = get_logs($selector, $params, $order, $limitfrom, $limitnum, $totalcount);
 300     $result['totalcount'] = $totalcount;
 301     return $result;
 302 }
 303
 304
 305 function print_log($course, $user=0, $date=0, $order="l.time ASC", $page=0, $perpage=100,
 306                    $url="", $modname="", $modid=0, $modaction="", $groupid=0) {
 307
 308     global $CFG, $DB, $OUTPUT;
 309
 310     if (!$logs = build_logs_array($course, $user, $date, $order, $page*$perpage, $perpage,
 311                        $modname, $modid, $modaction, $groupid)) {
 312         echo $OUTPUT->notification("No logs found!");
 313         echo $OUTPUT->footer();
 314         exit;
 315     }
 316
 317     $courses = array();
 318
 319     if ($course->id == SITEID) {
 320         $courses[0] = '';
 321         if ($ccc = get_courses('all', 'c.id ASC', 'c.id,c.shortname')) {
 322             foreach ($ccc as $cc) {
 323                 $courses[$cc->id] = $cc->shortname;
 324             }
 325         }
 326     } else {
 327         $courses[$course->id] = $course->shortname;
 328     }
 329
 330     $totalcount = $logs['totalcount'];
 331     $count=0;
 332     $ldcache = array();
 333     $tt = getdate(time());
 334     $today = mktime (0, 0, 0, $tt["mon"], $tt["mday"], $tt["year"]);
 335
 336     $strftimedatetime = get_string("strftimedatetime");
 337
 338     echo "<div class=\"info\">\n";
 339     print_string("displayingrecords", "", $totalcount);
 340     echo "</div>\n";
 341
 342     echo $OUTPUT->paging_bar($totalcount, $page, $perpage, "$url&perpage=$perpage");
 343
 344     $table = new html_table();
 345     $table->classes = array('logtable','generalbox');
 346     $table->align = array('right', 'left', 'left');
 347     $table->head = array(
 348         get_string('time'),
 349         get_string('ip_address'),
 350         get_string('fullnamecourse'),
 351         get_string('action'),
 352         get_string('info')
 353     );
 354     $table->data = array();
 355
 356     if ($course->id == SITEID) {
 357         array_unshift($table->align, 'left');
 358         array_unshift($table->head, get_string('course'));
 359     }
 360
 361     // Make sure that the logs array is an array, even it is empty, to avoid warnings from the foreach.
 362     if (empty($logs['logs'])) {
 363         $logs['logs'] = array();
 364     }
 365
 366     foreach ($logs['logs'] as $log) {
 367
 368         if (isset($ldcache[$log->module][$log->action])) {
 369             $ld = $ldcache[$log->module][$log->action];
 370         } else {
 371             $ld = $DB->get_record('log_display', array('module'=>$log->module, 'action'=>$log->action));
 372             $ldcache[$log->module][$log->action] = $ld;
 373         }
 374         if ($ld && is_numeric($log->info)) {
 375             // ugly hack to make sure fullname is shown correctly
 376             if ($ld->mtable == 'user' && $ld->field == $DB->sql_concat('firstname', "' '" , 'lastname')) {
 377                 $log->info = fullname($DB->get_record($ld->mtable, array('id'=>$log->info)), true);
 378             } else {
 379                 $log->info = $DB->get_field($ld->mtable, $ld->field, array('id'=>$log->info));
 380             }
 381         }
 382
 383         //Filter log->info
 384         $log->info = format_string($log->info);
 385
 386         // If $log->url has been trimmed short by the db size restriction
 387         // code in add_to_log, keep a note so we don't add a link to a broken url
 388         $tl=textlib_get_instance();
 389         $brokenurl=($tl->strlen($log->url)==100 && $tl->substr($log->url,97)=='...');
 390
 391         $row = array();
 392         if ($course->id == SITEID) {
 393             if (empty($log->course)) {
 394                 $row[] = get_string('site');
 395             } else {
 396                 $row[] = "<a href=\"{$CFG->wwwroot}/course/view.php?id={$log->course}\">". format_string($courses[$log->course])."</a>";
 397             }
 398         }
 399
 400         $row[] = userdate($log->time, '%a').' '.userdate($log->time, $strftimedatetime);
 401
 402         $link = new moodle_url("/iplookup/index.php?ip=$log->ip&user=$log->userid");
 403         $row[] = $OUTPUT->action_link($link, $log->ip, new popup_action('click', $link, 'iplookup', array('height' => 440, 'width' => 700)));
 404
 405         $row[] = html_writer::link(new moodle_url("/user/view.php?id={$log->userid}&course={$log->course}"), fullname($log, has_capability('moodle/site:viewfullnames', get_context_instance(CONTEXT_COURSE, $course->id))));
 406
 407         $displayaction="$log->module $log->action";
 408         if ($brokenurl) {
 409             $row[] = $displayaction;
 410         } else {
 411             $link = make_log_url($log->module,$log->url);
 412             $row[] = $OUTPUT->action_link($link, $displayaction, new popup_action('click', $link, 'fromloglive'), array('height' => 440, 'width' => 700));
 413         }
 414         $row[] = $log->info;
 415         $table->data[] = $row;
 416     }
 417
 418     echo html_writer::table($table);
 419     echo $OUTPUT->paging_bar($totalcount, $page, $perpage, "$url&perpage=$perpage");
 420 }
 421
 422
 423 function print_mnet_log($hostid, $course, $user=0, $date=0, $order="l.time ASC", $page=0, $perpage=100,
 424                    $url="", $modname="", $modid=0, $modaction="", $groupid=0) {
 425
 426     global $CFG, $DB, $OUTPUT;
 427
 428     if (!$logs = build_mnet_logs_array($hostid, $course, $user, $date, $order, $page*$perpage, $perpage,
 429                        $modname, $modid, $modaction, $groupid)) {
 430         echo $OUTPUT->notification("No logs found!");
 431         echo $OUTPUT->footer();
 432         exit;
 433     }
 434
 435     if ($course->id == SITEID) {
 436         $courses[0] = '';
 437         if ($ccc = get_courses('all', 'c.id ASC', 'c.id,c.shortname,c.visible')) {
 438             foreach ($ccc as $cc) {
 439                 $courses[$cc->id] = $cc->shortname;
 440             }
 441         }
 442     }
 443
 444     $totalcount = $logs['totalcount'];
 445     $count=0;
 446     $ldcache = array();
 447     $tt = getdate(time());
 448     $today = mktime (0, 0, 0, $tt["mon"], $tt["mday"], $tt["year"]);
 449
 450     $strftimedatetime = get_string("strftimedatetime");
 451
 452     echo "<div class=\"info\">\n";
 453     print_string("displayingrecords", "", $totalcount);
 454     echo "</div>\n";
 455
 456     echo $OUTPUT->paging_bar($totalcount, $page, $perpage, "$url&perpage=$perpage");
 457
 458     echo "<table class=\"logtable\" cellpadding=\"3\" cellspacing=\"0\">\n";
 459     echo "<tr>";
 460     if ($course->id == SITEID) {
 461         echo "<th class=\"c0 header\">".get_string('course')."</th>\n";
 462     }
 463     echo "<th class=\"c1 header\">".get_string('time')."</th>\n";
 464     echo "<th class=\"c2 header\">".get_string('ip_address')."</th>\n";
 465     echo "<th class=\"c3 header\">".get_string('fullnamecourse')."</th>\n";
 466     echo "<th class=\"c4 header\">".get_string('action')."</th>\n";
 467     echo "<th class=\"c5 header\">".get_string('info')."</th>\n";
 468     echo "</tr>\n";
 469
 470     if (empty($logs['logs'])) {
 471         echo "</table>\n";
 472         return;
 473     }
 474
 475     $row = 1;
 476     foreach ($logs['logs'] as $log) {
 477
 478         $log->info = $log->coursename;
 479         $row = ($row + 1) % 2;
 480
 481         if (isset($ldcache[$log->module][$log->action])) {
 482             $ld = $ldcache[$log->module][$log->action];
 483         } else {
 484             $ld = $DB->get_record('log_display', array('module'=>$log->module, 'action'=>$log->action));
 485             $ldcache[$log->module][$log->action] = $ld;
 486         }
 487         if (0 && $ld && !empty($log->info)) {
 488             // ugly hack to make sure fullname is shown correctly
 489             if (($ld->mtable == 'user') and ($ld->field == $DB->sql_concat('firstname', "' '" , 'lastname'))) {
 490                 $log->info = fullname($DB->get_record($ld->mtable, array('id'=>$log->info)), true);
 491             } else {
 492                 $log->info = $DB->get_field($ld->mtable, $ld->field, array('id'=>$log->info));
 493             }
 494         }
 495
 496         //Filter log->info
 497         $log->info = format_string($log->info);
 498
 499         echo '<tr class="r'.$row.'">';
 500         if ($course->id == SITEID) {
 501             echo "<td class=\"r$row c0\" >\n";
 502             echo "    <a href=\"{$CFG->wwwroot}/course/view.php?id={$log->course}\">".$courses[$log->course]."</a>\n";
 503             echo "</td>\n";
 504         }
 505         echo "<td class=\"r$row c1\" align=\"right\">".userdate($log->time, '%a').
 506              ' '.userdate($log->time, $strftimedatetime)."</td>\n";
 507         echo "<td class=\"r$row c2\" >\n";
 508         $link = new moodle_url("/iplookup/index.php?ip=$log->ip&user=$log->userid");
 509         echo $OUTPUT->action_link($link, $log->ip, new popup_action('click', $link, 'iplookup', array('height' => 400, 'width' => 700)));
 510         echo "</td>\n";
 511         $fullname = fullname($log, has_capability('moodle/site:viewfullnames', get_context_instance(CONTEXT_COURSE, $course->id)));
 512         echo "<td class=\"r$row c3\" >\n";
 513         echo "    <a href=\"$CFG->wwwroot/user/view.php?id={$log->userid}\">$fullname</a>\n";
 514         echo "</td>\n";
 515         echo "<td class=\"r$row c4\">\n";
 516         echo $log->action .': '.$log->module;
 517         echo "</td>\n";;
 518         echo "<td class=\"r$row c5\">{$log->info}</td>\n";
 519         echo "</tr>\n";
 520     }
 521     echo "</table>\n";
 522
 523     echo $OUTPUT->paging_bar($totalcount, $page, $perpage, "$url&perpage=$perpage");
 524 }
 525
 526
 527 function print_log_csv($course, $user, $date, $order='l.time DESC', $modname,
 528                         $modid, $modaction, $groupid) {
 529     global $DB;
 530
 531     $text = get_string('course')."\t".get_string('time')."\t".get_string('ip_address')."\t".
 532             get_string('fullnamecourse')."\t".get_string('action')."\t".get_string('info');
 533
 534     if (!$logs = build_logs_array($course, $user, $date, $order, '', '',
 535                        $modname, $modid, $modaction, $groupid)) {
 536         return false;
 537     }
 538
 539     $courses = array();
 540
 541     if ($course->id == SITEID) {
 542         $courses[0] = '';
 543         if ($ccc = get_courses('all', 'c.id ASC', 'c.id,c.shortname')) {
 544             foreach ($ccc as $cc) {
 545                 $courses[$cc->id] = $cc->shortname;
 546             }
 547         }
 548     } else {
 549         $courses[$course->id] = $course->shortname;
 550     }
 551
 552     $count=0;
 553     $ldcache = array();
 554     $tt = getdate(time());
 555     $today = mktime (0, 0, 0, $tt["mon"], $tt["mday"], $tt["year"]);
 556
 557     $strftimedatetime = get_string("strftimedatetime");
 558
 559     $filename = 'logs_'.userdate(time(),get_string('backupnameformat', 'langconfig'),99,false);
 560     $filename .= '.txt';
 561     header("Content-Type: application/download\n");
 562     header("Content-Disposition: attachment; filename=$filename");
 563     header("Expires: 0");
 564     header("Cache-Control: must-revalidate,post-check=0,pre-check=0");
 565     header("Pragma: public");
 566
 567     echo get_string('savedat').userdate(time(), $strftimedatetime)."\n";
 568     echo $text;
 569
 570     if (empty($logs['logs'])) {
 571         return true;
 572     }
 573
 574     foreach ($logs['logs'] as $log) {
 575         if (isset($ldcache[$log->module][$log->action])) {
 576             $ld = $ldcache[$log->module][$log->action];
 577         } else {
 578             $ld = $DB->get_record('log_display', array('module'=>$log->module, 'action'=>$log->action));
 579             $ldcache[$log->module][$log->action] = $ld;
 580         }
 581         if ($ld && !empty($log->info)) {
 582             // ugly hack to make sure fullname is shown correctly
 583             if (($ld->mtable == 'user') and ($ld->field ==  $DB->sql_concat('firstname', "' '" , 'lastname'))) {
 584                 $log->info = fullname($DB->get_record($ld->mtable, array('id'=>$log->info)), true);
 585             } else {
 586                 $log->info = $DB->get_field($ld->mtable, $ld->field, array('id'=>$log->info));
 587             }
 588         }
 589
 590         //Filter log->info
 591         $log->info = format_string($log->info);
 592         $log->info = strip_tags(urldecode($log->info));    // Some XSS protection
 593
 594         $firstField = $courses[$log->course];
 595         $fullname = fullname($log, has_capability('moodle/site:viewfullnames', get_context_instance(CONTEXT_COURSE, $course->id)));
 596         $row = array($firstField, userdate($log->time, $strftimedatetime), $log->ip, $fullname, $log->module.' '.$log->action, $log->info);
 597         $text = implode("\t", $row);
 598         echo $text." \n";
 599     }
 600     return true;
 601 }
 602
 603
 604 function print_log_xls($course, $user, $date, $order='l.time DESC', $modname,
 605                         $modid, $modaction, $groupid) {
 606
 607     global $CFG, $DB;
 608
 609     require_once("$CFG->libdir/excellib.class.php");
 610
 611     if (!$logs = build_logs_array($course, $user, $date, $order, '', '',
 612                        $modname, $modid, $modaction, $groupid)) {
 613         return false;
 614     }
 615
 616     $courses = array();
 617
 618     if ($course->id == SITEID) {
 619         $courses[0] = '';
 620         if ($ccc = get_courses('all', 'c.id ASC', 'c.id,c.shortname')) {
 621             foreach ($ccc as $cc) {
 622                 $courses[$cc->id] = $cc->shortname;
 623             }
 624         }
 625     } else {
 626         $courses[$course->id] = $course->shortname;
 627     }
 628
 629     $count=0;
 630     $ldcache = array();
 631     $tt = getdate(time());
 632     $today = mktime (0, 0, 0, $tt["mon"], $tt["mday"], $tt["year"]);
 633
 634     $strftimedatetime = get_string("strftimedatetime");
 635
 636     $nroPages = ceil(count($logs)/(EXCELROWS-FIRSTUSEDEXCELROW+1));
 637     $filename = 'logs_'.userdate(time(),get_string('backupnameformat', 'langconfig'),99,false);
 638     $filename .= '.xls';
 639
 640     $workbook = new MoodleExcelWorkbook('-');
 641     $workbook->send($filename);
 642
 643     $worksheet = array();
 644     $headers = array(get_string('course'), get_string('time'), get_string('ip_address'),
 645                         get_string('fullnamecourse'),    get_string('action'), get_string('info'));
 646
 647     // Creating worksheets
 648     for ($wsnumber = 1; $wsnumber <= $nroPages; $wsnumber++) {
 649         $sheettitle = get_string('logs').' '.$wsnumber.'-'.$nroPages;
 650         $worksheet[$wsnumber] =& $workbook->add_worksheet($sheettitle);
 651         $worksheet[$wsnumber]->set_column(1, 1, 30);
 652         $worksheet[$wsnumber]->write_string(0, 0, get_string('savedat').
 653                                     userdate(time(), $strftimedatetime));
 654         $col = 0;
 655         foreach ($headers as $item) {
 656             $worksheet[$wsnumber]->write(FIRSTUSEDEXCELROW-1,$col,$item,'');
 657             $col++;
 658         }
 659     }
 660
 661     if (empty($logs['logs'])) {
 662         $workbook->close();
 663         return true;
 664     }
 665
 666     $formatDate =& $workbook->add_format();
 667     $formatDate->set_num_format(get_string('log_excel_date_format'));
 668
 669     $row = FIRSTUSEDEXCELROW;
 670     $wsnumber = 1;
 671     $myxls =& $worksheet[$wsnumber];
 672     foreach ($logs['logs'] as $log) {
 673         if (isset($ldcache[$log->module][$log->action])) {
 674             $ld = $ldcache[$log->module][$log->action];
 675         } else {
 676             $ld = $DB->get_record('log_display', array('module'=>$log->module, 'action'=>$log->action));
 677             $ldcache[$log->module][$log->action] = $ld;
 678         }
 679         if ($ld && !empty($log->info)) {
 680             // ugly hack to make sure fullname is shown correctly
 681             if (($ld->mtable == 'user') and ($ld->field == $DB->sql_concat('firstname', "' '" , 'lastname'))) {
 682                 $log->info = fullname($DB->get_record($ld->mtable, array('id'=>$log->info)), true);
 683             } else {
 684                 $log->info = $DB->get_field($ld->mtable, $ld->field, array('id'=>$log->info));
 685             }
 686         }
 687
 688         // Filter log->info
 689         $log->info = format_string($log->info);
 690         $log->info = strip_tags(urldecode($log->info));  // Some XSS protection
 691
 692         if ($nroPages>1) {
 693             if ($row > EXCELROWS) {
 694                 $wsnumber++;
 695                 $myxls =& $worksheet[$wsnumber];
 696                 $row = FIRSTUSEDEXCELROW;
 697             }
 698         }
 699
 700         $myxls->write($row, 0, $courses[$log->course], '');
 701         $myxls->write_date($row, 1, $log->time, $formatDate); // write_date() does conversion/timezone support. MDL-14934
 702         $myxls->write($row, 2, $log->ip, '');
 703         $fullname = fullname($log, has_capability('moodle/site:viewfullnames', get_context_instance(CONTEXT_COURSE, $course->id)));
 704         $myxls->write($row, 3, $fullname, '');
 705         $myxls->write($row, 4, $log->module.' '.$log->action, '');
 706         $myxls->write($row, 5, $log->info, '');
 707
 708         $row++;
 709     }
 710
 711     $workbook->close();
 712     return true;
 713 }
 714
 715 function print_log_ods($course, $user, $date, $order='l.time DESC', $modname,
 716                         $modid, $modaction, $groupid) {
 717
 718     global $CFG, $DB;
 719
 720     require_once("$CFG->libdir/odslib.class.php");
 721
 722     if (!$logs = build_logs_array($course, $user, $date, $order, '', '',
 723                        $modname, $modid, $modaction, $groupid)) {
 724         return false;
 725     }
 726
 727     $courses = array();
 728
 729     if ($course->id == SITEID) {
 730         $courses[0] = '';
 731         if ($ccc = get_courses('all', 'c.id ASC', 'c.id,c.shortname')) {
 732             foreach ($ccc as $cc) {
 733                 $courses[$cc->id] = $cc->shortname;
 734             }
 735         }
 736     } else {
 737         $courses[$course->id] = $course->shortname;
 738     }
 739
 740     $count=0;
 741     $ldcache = array();
 742     $tt = getdate(time());
 743     $today = mktime (0, 0, 0, $tt["mon"], $tt["mday"], $tt["year"]);
 744
 745     $strftimedatetime = get_string("strftimedatetime");
 746
 747     $nroPages = ceil(count($logs)/(EXCELROWS-FIRSTUSEDEXCELROW+1));
 748     $filename = 'logs_'.userdate(time(),get_string('backupnameformat', 'langconfig'),99,false);
 749     $filename .= '.ods';
 750
 751     $workbook = new MoodleODSWorkbook('-');
 752     $workbook->send($filename);
 753
 754     $worksheet = array();
 755     $headers = array(get_string('course'), get_string('time'), get_string('ip_address'),
 756                         get_string('fullnamecourse'),    get_string('action'), get_string('info'));
 757
 758     // Creating worksheets
 759     for ($wsnumber = 1; $wsnumber <= $nroPages; $wsnumber++) {
 760         $sheettitle = get_string('logs').' '.$wsnumber.'-'.$nroPages;
 761         $worksheet[$wsnumber] =& $workbook->add_worksheet($sheettitle);
 762         $worksheet[$wsnumber]->set_column(1, 1, 30);
 763         $worksheet[$wsnumber]->write_string(0, 0, get_string('savedat').
 764                                     userdate(time(), $strftimedatetime));
 765         $col = 0;
 766         foreach ($headers as $item) {
 767             $worksheet[$wsnumber]->write(FIRSTUSEDEXCELROW-1,$col,$item,'');
 768             $col++;
 769         }
 770     }
 771
 772     if (empty($logs['logs'])) {
 773         $workbook->close();
 774         return true;
 775     }
 776
 777     $formatDate =& $workbook->add_format();
 778     $formatDate->set_num_format(get_string('log_excel_date_format'));
 779
 780     $row = FIRSTUSEDEXCELROW;
 781     $wsnumber = 1;
 782     $myxls =& $worksheet[$wsnumber];
 783     foreach ($logs['logs'] as $log) {
 784         if (isset($ldcache[$log->module][$log->action])) {
 785             $ld = $ldcache[$log->module][$log->action];
 786         } else {
 787             $ld = $DB->get_record('log_display', array('module'=>$log->module, 'action'=>$log->action));
 788             $ldcache[$log->module][$log->action] = $ld;
 789         }
 790         if ($ld && !empty($log->info)) {
 791             // ugly hack to make sure fullname is shown correctly
 792             if (($ld->mtable == 'user') and ($ld->field == $DB->sql_concat('firstname', "' '" , 'lastname'))) {
 793                 $log->info = fullname($DB->get_record($ld->mtable, array('id'=>$log->info)), true);
 794             } else {
 795                 $log->info = $DB->get_field($ld->mtable, $ld->field, array('id'=>$log->info));
 796             }
 797         }
 798
 799         // Filter log->info
 800         $log->info = format_string($log->info);
 801         $log->info = strip_tags(urldecode($log->info));  // Some XSS protection
 802
 803         if ($nroPages>1) {
 804             if ($row > EXCELROWS) {
 805                 $wsnumber++;
 806                 $myxls =& $worksheet[$wsnumber];
 807                 $row = FIRSTUSEDEXCELROW;
 808             }
 809         }
 810
 811         $myxls->write_string($row, 0, $courses[$log->course]);
 812         $myxls->write_date($row, 1, $log->time);
 813         $myxls->write_string($row, 2, $log->ip);
 814         $fullname = fullname($log, has_capability('moodle/site:viewfullnames', get_context_instance(CONTEXT_COURSE, $course->id)));
 815         $myxls->write_string($row, 3, $fullname);
 816         $myxls->write_string($row, 4, $log->module.' '.$log->action);
 817         $myxls->write_string($row, 5, $log->info);
 818
 819         $row++;
 820     }
 821
 822     $workbook->close();
 823     return true;
 824 }
 825
 826
 827 function print_log_graph($course, $userid=0, $type="course.png", $date=0) {
 828     global $CFG, $USER;
 829     if (empty($CFG->gdversion)) {
 830         echo "(".get_string("gdneed").")";
 831     } else {
 832         // MDL-10818, do not display broken graph when user has no permission to view graph
 833         if (has_capability('coursereport/log:view', get_context_instance(CONTEXT_COURSE, $course->id)) ||
 834             ($course->showreports and $USER->id == $userid)) {
 835             echo '<img src="'.$CFG->wwwroot.'/course/report/log/graph.php?id='.$course->id.
 836                  '&amp;user='.$userid.'&amp;type='.$type.'&amp;date='.$date.'" alt="" />';
 837         }
 838     }
 839 }
 840
 841
 842 function print_overview($courses, array $remote_courses=array()) {
 843     global $CFG, $USER, $DB, $OUTPUT;
 844
 845     $htmlarray = array();
 846     if ($modules = $DB->get_records('modules')) {
 847         foreach ($modules as $mod) {
 848             if (file_exists(dirname(dirname(__FILE__)).'/mod/'.$mod->name.'/lib.php')) {
 849                 include_once(dirname(dirname(__FILE__)).'/mod/'.$mod->name.'/lib.php');
 850                 $fname = $mod->name.'_print_overview';
 851                 if (function_exists($fname)) {
 852                     $fname($courses,$htmlarray);
 853                 }
 854             }
 855         }
 856     }
 857     foreach ($courses as $course) {
 858         echo $OUTPUT->box_start('coursebox');
 859         $attributes = array('title' => s($course->fullname));
 860         if (empty($course->visible)) {
 861             $attributes['class'] = 'dimmed';
 862         }
 863         echo $OUTPUT->heading(html_writer::link(
 864             new moodle_url('/course/view.php', array('id' => $course->id)), format_string($course->fullname), $attributes), 3);
 865         if (array_key_exists($course->id,$htmlarray)) {
 866             foreach ($htmlarray[$course->id] as $modname => $html) {
 867                 echo $html;
 868             }
 869         }
 870         echo $OUTPUT->box_end();
 871     }
 872
 873     if (!empty($remote_courses)) {
 874         echo $OUTPUT->heading(get_string('remotecourses', 'mnet'));
 875     }
 876     foreach ($remote_courses as $course) {
 877         echo $OUTPUT->box_start('coursebox');
 878         $attributes = array('title' => s($course->fullname));
 879         echo $OUTPUT->heading(html_writer::link(
 880             new moodle_url('/auth/mnet/jump.php', array('hostid' => $course->hostid, 'wantsurl' => '/course/view.php?id='.$course->remoteid)),
 881             format_string($course->shortname),
 882             $attributes) . ' (' . format_string($course->hostname) . ')', 3);
 883         echo $OUTPUT->box_end();
 884     }
 885 }
 886
 887
 888 /**
 889  * This function trawls through the logs looking for
 890  * anything new since the user's last login
 891  */
 892 function print_recent_activity($course) {
 893     // $course is an object
 894     global $CFG, $USER, $SESSION, $DB, $OUTPUT;
 895
 896     $context = get_context_instance(CONTEXT_COURSE, $course->id);
 897
 898     $viewfullnames = has_capability('moodle/site:viewfullnames', $context);
 899
 900     $timestart = round(time() - COURSE_MAX_RECENT_PERIOD, -2); // better db caching for guests - 100 seconds
 901
 902     if (!isguestuser()) {
 903         if (!empty($USER->lastcourseaccess[$course->id])) {
 904             if ($USER->lastcourseaccess[$course->id] > $timestart) {
 905                 $timestart = $USER->lastcourseaccess[$course->id];
 906             }
 907         }
 908     }
 909
 910     echo '<div class="activitydate">';
 911     echo get_string('activitysince', '', userdate($timestart));
 912     echo '</div>';
 913     echo '<div class="activityhead">';
 914
 915     echo '<a href="'.$CFG->wwwroot.'/course/recent.php?id='.$course->id.'">'.get_string('recentactivityreport').'</a>';
 916
 917     echo "</div>\n";
 918
 919     $content = false;
 920
 921 /// Firstly, have there been any new enrolments?
 922
 923     $users = get_recent_enrolments($course->id, $timestart);
 924
 925     //Accessibility: new users now appear in an <OL> list.
 926     if ($users) {
 927         echo '<div class="newusers">';
 928         echo $OUTPUT->heading(get_string("newusers").':', 3);
 929         $content = true;
 930         echo "<ol class=\"list\">\n";
 931         foreach ($users as $user) {
 932             $fullname = fullname($user, $viewfullnames);
 933             echo '<li class="name"><a href="'."$CFG->wwwroot/user/view.php?id=$user->id&amp;course=$course->id\">$fullname</a></li>\n";
 934         }
 935         echo "</ol>\n</div>\n";
 936     }
 937
 938 /// Next, have there been any modifications to the course structure?
 939
 940     $modinfo =& get_fast_modinfo($course);
 941
 942     $changelist = array();
 943
 944     $logs = $DB->get_records_select('log', "time > ? AND course = ? AND
 945                                             module = 'course' AND
 946                                             (action = 'add mod' OR action = 'update mod' OR action = 'delete mod')",
 947                                     array($timestart, $course->id), "id ASC");
 948
 949     if ($logs) {
 950         $actions  = array('add mod', 'update mod', 'delete mod');
 951         $newgones = array(); // added and later deleted items
 952         foreach ($logs as $key => $log) {
 953             if (!in_array($log->action, $actions)) {
 954                 continue;
 955             }
 956             $info = explode(' ', $log->info);
 957
 958             // note: in most cases I replaced hardcoding of label with use of
 959             // $cm->has_view() but it was not possible to do this here because
 960             // we don't necessarily have the $cm for it
 961             if ($info[0] == 'label') {     // Labels are ignored in recent activity
 962                 continue;
 963             }
 964
 965             if (count($info) != 2) {
 966                 debugging("Incorrect log entry info: id = ".$log->id, DEBUG_DEVELOPER);
 967                 continue;
 968             }
 969
 970             $modname    = $info[0];
 971             $instanceid = $info[1];
 972
 973             if ($log->action == 'delete mod') {
 974                 // unfortunately we do not know if the mod was visible
 975                 if (!array_key_exists($log->info, $newgones)) {
 976                     $strdeleted = get_string('deletedactivity', 'moodle', get_string('modulename', $modname));
 977                     $changelist[$log->info] = array ('operation' => 'delete', 'text' => $strdeleted);
 978                 }
 979             } else {
 980                 if (!isset($modinfo->instances[$modname][$instanceid])) {
 981                     if ($log->action == 'add mod') {
 982                         // do not display added and later deleted activities
 983                         $newgones[$log->info] = true;
 984                     }
 985                     continue;
 986                 }
 987                 $cm = $modinfo->instances[$modname][$instanceid];
 988                 if (!$cm->uservisible) {
 989                     continue;
 990                 }
 991
 992                 if ($log->action == 'add mod') {
 993                     $stradded = get_string('added', 'moodle', get_string('modulename', $modname));
 994                     $changelist[$log->info] = array('operation' => 'add', 'text' => "$stradded:<br /><a href=\"$CFG->wwwroot/mod/$cm->modname/view.php?id={$cm->id}\">".format_string($cm->name, true)."</a>");
 995
 996                 } else if ($log->action == 'update mod' and empty($changelist[$log->info])) {
 997                     $strupdated = get_string('updated', 'moodle', get_string('modulename', $modname));
 998                     $changelist[$log->info] = array('operation' => 'update', 'text' => "$strupdated:<br /><a href=\"$CFG->wwwroot/mod/$cm->modname/view.php?id={$cm->id}\">".format_string($cm->name, true)."</a>");
 999                 }
1000             }
1001         }
1002     }
1003
1004     if (!empty($changelist)) {
1005         echo $OUTPUT->heading(get_string("courseupdates").':', 3);
1006         $content = true;
1007         foreach ($changelist as $changeinfo => $change) {
1008             echo '<p class="activity">'.$change['text'].'</p>';
1009         }
1010     }
1011
1012 /// Now display new things from each module
1013
1014     $usedmodules = array();
1015     foreach($modinfo->cms as $cm) {
1016         if (isset($usedmodules[$cm->modname])) {
1017             continue;
1018         }
1019         if (!$cm->uservisible) {
1020             continue;
1021         }
1022         $usedmodules[$cm->modname] = $cm->modname;
1023     }
1024
1025     foreach ($usedmodules as $modname) {      // Each module gets it's own logs and prints them
1026         if (file_exists($CFG->dirroot.'/mod/'.$modname.'/lib.php')) {
1027             include_once($CFG->dirroot.'/mod/'.$modname.'/lib.php');
1028             $print_recent_activity = $modname.'_print_recent_activity';
1029             if (function_exists($print_recent_activity)) {
1030                 // NOTE: original $isteacher (second parameter below) was replaced with $viewfullnames!
1031                 $content = $print_recent_activity($course, $viewfullnames, $timestart) || $content;
1032             }
1033         } else {
1034             debugging("Missing lib.php in lib/{$modname} - please reinstall files or uninstall the module");
1035         }
1036     }
1037
1038     if (! $content) {
1039         echo '<p class="message">'.get_string('nothingnew').'</p>';
1040     }
1041 }
1042
1043 /**
1044  * For a given course, returns an array of course activity objects
1045  * Each item in the array contains he following properties:
1046  */
1047 function get_array_of_activities($courseid) {
1048 //  cm - course module id
1049 //  mod - name of the module (eg forum)
1050 //  section - the number of the section (eg week or topic)
1051 //  name - the name of the instance
1052 //  visible - is the instance visible or not
1053 //  groupingid - grouping id
1054 //  groupmembersonly - is this instance visible to group members only
1055 //  extra - contains extra string to include in any link
1056     global $CFG, $DB;
1057     if(!empty($CFG->enableavailability)) {
1058         require_once($CFG->libdir.'/conditionlib.php');
1059     }
1060
1061     $course = $DB->get_record('course', array('id'=>$courseid));
1062
1063     if (empty($course)) {
1064         throw new moodle_exception('courseidnotfound');
1065     }
1066
1067     $mod = array();
1068
1069     $rawmods = get_course_mods($courseid);
1070     if (empty($rawmods)) {
1071         return $mod; // always return array
1072     }
1073
1074     if ($sections = $DB->get_records("course_sections", array("course"=>$courseid), "section ASC")) {
1075        foreach ($sections as $section) {
1076            if (!empty($section->sequence)) {
1077                $sequence = explode(",", $section->sequence);
1078                foreach ($sequence as $seq) {
1079                    if (empty($rawmods[$seq])) {
1080                        continue;
1081                    }
1082                    $mod[$seq]->id               = $rawmods[$seq]->instance;
1083                    $mod[$seq]->cm               = $rawmods[$seq]->id;
1084                    $mod[$seq]->mod              = $rawmods[$seq]->modname;
1085
1086                     // Oh dear. Inconsistent names left here for backward compatibility.
1087                    $mod[$seq]->section          = $section->section;
1088                    $mod[$seq]->sectionid        = $rawmods[$seq]->section;
1089
1090                    $mod[$seq]->module           = $rawmods[$seq]->module;
1091                    $mod[$seq]->added            = $rawmods[$seq]->added;
1092                    $mod[$seq]->score            = $rawmods[$seq]->score;
1093                    $mod[$seq]->idnumber         = $rawmods[$seq]->idnumber;
1094                    $mod[$seq]->visible          = $rawmods[$seq]->visible;
1095                    $mod[$seq]->visibleold       = $rawmods[$seq]->visibleold;
1096                    $mod[$seq]->groupmode        = $rawmods[$seq]->groupmode;
1097                    $mod[$seq]->groupingid       = $rawmods[$seq]->groupingid;
1098                    $mod[$seq]->groupmembersonly = $rawmods[$seq]->groupmembersonly;
1099                    $mod[$seq]->indent           = $rawmods[$seq]->indent;
1100                    $mod[$seq]->completion       = $rawmods[$seq]->completion;
1101                    $mod[$seq]->extra            = "";
1102                    $mod[$seq]->completiongradeitemnumber =
1103                            $rawmods[$seq]->completiongradeitemnumber;
1104                    $mod[$seq]->completionview   = $rawmods[$seq]->completionview;
1105                    $mod[$seq]->completionexpected = $rawmods[$seq]->completionexpected;
1106                    $mod[$seq]->availablefrom    = $rawmods[$seq]->availablefrom;
1107                    $mod[$seq]->availableuntil   = $rawmods[$seq]->availableuntil;
1108                    $mod[$seq]->showavailability = $rawmods[$seq]->showavailability;
1109                    if (!empty($CFG->enableavailability)) {
1110                        condition_info::fill_availability_conditions($rawmods[$seq]);
1111                        $mod[$seq]->conditionscompletion = $rawmods[$seq]->conditionscompletion;
1112                        $mod[$seq]->conditionsgrade  = $rawmods[$seq]->conditionsgrade;
1113                    }
1114
1115                    $modname = $mod[$seq]->mod;
1116                    $functionname = $modname."_get_coursemodule_info";
1117
1118                    if (!file_exists("$CFG->dirroot/mod/$modname/lib.php")) {
1119                        continue;
1120                    }
1121
1122                    include_once("$CFG->dirroot/mod/$modname/lib.php");
1123
1124                    if (function_exists($functionname)) {
1125                        if ($info = $functionname($rawmods[$seq])) {
1126                            if (!empty($info->icon)) {
1127                                $mod[$seq]->icon = $info->icon;
1128                            }
1129                            if (!empty($info->iconcomponent)) {
1130                                $mod[$seq]->iconcomponent = $info->iconcomponent;
1131                            }
1132                            if (!empty($info->name)) {
1133                                $mod[$seq]->name = $info->name;
1134                            }
1135                            if ($info instanceof cached_cm_info) {
1136                                // When using cached_cm_info you can include three new fields
1137                                // that aren't available for legacy code
1138                                if (!empty($info->content)) {
1139                                    $mod[$seq]->content = $info->content;
1140                                }
1141                                if (!empty($info->extraclasses)) {
1142                                    $mod[$seq]->extraclasses = $info->extraclasses;
1143                                }
1144                                if (!empty($info->onclick)) {
1145                                    $mod[$seq]->onclick = $info->onclick;
1146                                }
1147                                if (!empty($info->customdata)) {
1148                                    $mod[$seq]->customdata = $info->customdata;
1149                                }
1150                            } else {
1151                                // When using a stdclass, the (horrible) deprecated ->extra field
1152                                // is available for BC
1153                                if (!empty($info->extra)) {
1154                                    $mod[$seq]->extra = $info->extra;
1155                                }
1156                            }
1157                        }
1158                    }
1159                    if (!isset($mod[$seq]->name)) {
1160                        $mod[$seq]->name = $DB->get_field($rawmods[$seq]->modname, "name", array("id"=>$rawmods[$seq]->instance));
1161                    }
1162
1163                    // Minimise the database size by unsetting default options when they are
1164                    // 'empty'. This list corresponds to code in the cm_info constructor.
1165                    foreach(array('idnumber', 'groupmode', 'groupingid', 'groupmembersonly',
1166                            'indent', 'completion', 'extra', 'extraclasses', 'onclick', 'content',
1167                            'icon', 'iconcomponent', 'customdata', 'showavailability', 'availablefrom',
1168                            'availableuntil', 'conditionscompletion', 'conditionsgrade',
1169                            'completionview', 'completionexpected', 'score') as $property) {
1170                        if (property_exists($mod[$seq], $property) &&
1171                                empty($mod[$seq]->{$property})) {
1172                            unset($mod[$seq]->{$property});
1173                        }
1174                    }
1175                    // Special case: this value is usually set to null, but may be 0
1176                    if (property_exists($mod[$seq], 'completiongradeitemnumber') &&
1177                            is_null($mod[$seq]->completiongradeitemnumber)) {
1178                        unset($mod[$seq]->completiongradeitemnumber);
1179                    }
1180                }
1181             }
1182         }
1183     }
1184     return $mod;
1185 }
1186
1187
1188 /**
1189  * Returns a number of useful structures for course displays
1190  */
1191 function get_all_mods($courseid, &$mods, &$modnames, &$modnamesplural, &$modnamesused) {
1192     global $CFG, $DB, $COURSE;
1193
1194     $mods          = array();    // course modules indexed by id
1195     $modnames      = array();    // all course module names (except resource!)
1196     $modnamesplural= array();    // all course module names (plural form)
1197     $modnamesused  = array();    // course module names used
1198
1199     if ($allmods = $DB->get_records("modules")) {
1200         foreach ($allmods as $mod) {
1201             if (!file_exists("$CFG->dirroot/mod/$mod->name/lib.php")) {
1202                 continue;
1203             }
1204             if ($mod->visible) {
1205                 $modnames[$mod->name] = get_string("modulename", "$mod->name");
1206                 $modnamesplural[$mod->name] = get_string("modulenameplural", "$mod->name");
1207             }
1208         }
1209         textlib_get_instance()->asort($modnames);
1210     } else {
1211         print_error("nomodules", 'debug');
1212     }
1213
1214     $course = ($courseid==$COURSE->id) ? $COURSE : $DB->get_record('course',array('id'=>$courseid));
1215     $modinfo = get_fast_modinfo($course);
1216
1217     if ($rawmods=$modinfo->cms) {
1218         foreach($rawmods as $mod) {    // Index the mods
1219             if (empty($modnames[$mod->modname])) {
1220                 continue;
1221             }
1222             $mods[$mod->id] = $mod;
1223             $mods[$mod->id]->modfullname = $modnames[$mod->modname];
1224             if (!$mod->visible and !has_capability('moodle/course:viewhiddenactivities', get_context_instance(CONTEXT_COURSE, $courseid))) {
1225                 continue;
1226             }
1227             // Check groupings
1228             if (!groups_course_module_visible($mod)) {
1229                 continue;
1230             }
1231             $modnamesused[$mod->modname] = $modnames[$mod->modname];
1232         }
1233         if ($modnamesused) {
1234             textlib_get_instance()->asort($modnamesused);
1235         }
1236     }
1237 }
1238
1239 /**
1240  * Returns an array of sections for the requested course id
1241  *
1242  * This function stores the sections against the course id within a staticvar encase
1243  * of subsequent requests. This is used all over + in some standard libs and course
1244  * format callbacks so subsequent requests are a reality.
1245  *
1246  * @staticvar array $coursesections
1247  * @param int $courseid
1248  * @return array Array of sections
1249  */
1250 function get_all_sections($courseid) {
1251     global $DB;
1252     static $coursesections = array();
1253     if (!array_key_exists($courseid, $coursesections)) {
1254         $coursesections[$courseid] = $DB->get_records("course_sections", array("course"=>"$courseid"), "section",
1255                            "section, id, course, name, summary, summaryformat, sequence, visible");
1256     }
1257     return $coursesections[$courseid];
1258 }
1259
1260 /**
1261  * Returns the course section to display or 0 meaning show all sections. Returns 0 for guests.
1262  * It also sets the $USER->display cache to array($courseid=>return value)
1263  *
1264  * @param int $courseid The course id
1265  * @return int Course section to display, 0 means all
1266  */
1267 function course_get_display($courseid) {
1268     global $USER, $DB;
1269
1270     if (!isloggedin() or isguestuser()) {
1271         //do not get settings in db for guests
1272         return 0; //return the implicit setting
1273     }
1274
1275     if (!isset($USER->display[$courseid])) {
1276         if (!$display = $DB->get_field('course_display', 'display', array('userid' => $USER->id, 'course'=>$courseid))) {
1277             $display = 0; // all sections option is not stored in DB, this makes the table much smaller
1278         }
1279         //use display cache for one course only - we need to keep session small
1280         $USER->display = array($courseid => $display);
1281     }
1282
1283     return $USER->display[$courseid];
1284 }
1285
1286 /**
1287  * Show one section only or all sections.
1288  *
1289  * @param int $courseid The course id
1290  * @param mixed $display show only this section, 0 or 'all' means show all sections
1291  * @return int Course section to display, 0 means all
1292  */
1293 function course_set_display($courseid, $display) {
1294     global $USER, $DB;
1295
1296     if ($display === 'all' or empty($display)) {
1297         $display = 0;
1298     }
1299
1300     if (!isloggedin() or isguestuser()) {
1301         //do not store settings in db for guests
1302         return 0;
1303     }
1304
1305     if ($display == 0) {
1306         //show all, do not store anything in database
1307         $DB->delete_records('course_display', array('userid' => $USER->id, 'course' => $courseid));
1308
1309     } else {
1310         if ($DB->record_exists('course_display', array('userid' => $USER->id, 'course' => $courseid))) {
1311             $DB->set_field('course_display', 'display', $display, array('userid' => $USER->id, 'course' => $courseid));
1312         } else {
1313             $record = new stdClass();
1314             $record->userid = $USER->id;
1315             $record->course = $courseid;
1316             $record->display = $display;
1317             $DB->insert_record('course_display', $record);
1318         }
1319     }
1320
1321     //use display cache for one course only - we need to keep session small
1322     $USER->display = array($courseid => $display);
1323
1324     return $display;
1325 }
1326
1327 /**
1328  * For a given course section, marks it visible or hidden,
1329  * and does the same for every activity in that section
1330  */
1331 function set_section_visible($courseid, $sectionnumber, $visibility) {
1332     global $DB;
1333
1334     if ($section = $DB->get_record("course_sections", array("course"=>$courseid, "section"=>$sectionnumber))) {
1335         $DB->set_field("course_sections", "visible", "$visibility", array("id"=>$section->id));
1336         if (!empty($section->sequence)) {
1337             $modules = explode(",", $section->sequence);
1338             foreach ($modules as $moduleid) {
1339                 set_coursemodule_visible($moduleid, $visibility, true);
1340             }
1341         }
1342         rebuild_course_cache($courseid);
1343     }
1344 }
1345
1346 /**
1347  * Obtains shared data that is used in print_section when displaying a
1348  * course-module entry.
1349  *
1350  * Calls format_text or format_string as appropriate, and obtains the correct icon.
1351  *
1352  * This data is also used in other areas of the code.
1353  * @param cm_info $cm Course-module data (must come from get_fast_modinfo)
1354  * @param object $course Moodle course object
1355  * @return array An array with the following values in this order:
1356  *   $content (optional extra content for after link),
1357  *   $instancename (text of link)
1358  */
1359 function get_print_section_cm_text(cm_info $cm, $course) {
1360     global $OUTPUT;
1361
1362     // Get course context
1363     $coursecontext = get_context_instance(CONTEXT_COURSE, $course->id);
1364
1365     // Get content from modinfo if specified. Content displays either
1366     // in addition to the standard link (below), or replaces it if
1367     // the link is turned off by setting ->url to null.
1368     if (($content = $cm->get_content()) !== '') {
1369         $labelformatoptions = new stdClass();
1370         $labelformatoptions->noclean = true;
1371         $labelformatoptions->overflowdiv = true;
1372         $labelformatoptions->context = $coursecontext;
1373         $content = format_text($content, FORMAT_HTML, $labelformatoptions);
1374     } else {
1375         $content = '';
1376     }
1377
1378     $stringoptions = new stdClass;
1379     $stringoptions->context = $coursecontext;
1380     $instancename = format_string($cm->name, true,  $stringoptions);
1381     return array($content, $instancename);
1382 }
1383
1384 /**
1385  * Prints a section full of activity modules
1386  */
1387 function print_section($course, $section, $mods, $modnamesused, $absolute=false, $width="100%", $hidecompletion=false) {
1388     global $CFG, $USER, $DB, $PAGE, $OUTPUT;
1389
1390     static $initialised;
1391
1392     static $groupbuttons;
1393     static $groupbuttonslink;
1394     static $isediting;
1395     static $ismoving;
1396     static $strmovehere;
1397     static $strmovefull;
1398     static $strunreadpostsone;
1399     static $groupings;
1400     static $modulenames;
1401
1402     if (!isset($initialised)) {
1403         $groupbuttons     = ($course->groupmode or (!$course->groupmodeforce));
1404         $groupbuttonslink = (!$course->groupmodeforce);
1405         $isediting        = $PAGE->user_is_editing();
1406         $ismoving         = $isediting && ismoving($course->id);
1407         if ($ismoving) {
1408             $strmovehere  = get_string("movehere");
1409             $strmovefull  = strip_tags(get_string("movefull", "", "'$USER->activitycopyname'"));
1410         }
1411         $modulenames      = array();
1412         $initialised = true;
1413     }
1414
1415     $tl = textlib_get_instance();
1416
1417     $modinfo = get_fast_modinfo($course);
1418     $completioninfo = new completion_info($course);
1419
1420     //Accessibility: replace table with list <ul>, but don't output empty list.
1421     if (!empty($section->sequence)) {
1422
1423         // Fix bug #5027, don't want style=\"width:$width\".
1424         echo "<ul class=\"section img-text\">\n";
1425         $sectionmods = explode(",", $section->sequence);
1426
1427         foreach ($sectionmods as $modnumber) {
1428             if (empty($mods[$modnumber])) {
1429                 continue;
1430             }
1431
1432             /**
1433              * @var cm_info
1434              */
1435             $mod = $mods[$modnumber];
1436
1437             if ($ismoving and $mod->id == $USER->activitycopy) {
1438                 // do not display moving mod
1439                 continue;
1440             }
1441
1442             if (isset($modinfo->cms[$modnumber])) {
1443                 // We can continue (because it will not be displayed at all)
1444                 // if:
1445                 // 1) The activity is not visible to users
1446                 // and
1447                 // 2a) The 'showavailability' option is not set (if that is set,
1448                 //     we need to display the activity so we can show
1449                 //     availability info)
1450                 // or
1451                 // 2b) The 'availableinfo' is empty, i.e. the activity was
1452                 //     hidden in a way that leaves no info, such as using the
1453                 //     eye icon.
1454                 if (!$modinfo->cms[$modnumber]->uservisible &&
1455                     (empty($modinfo->cms[$modnumber]->showavailability) ||
1456                       empty($modinfo->cms[$modnumber]->availableinfo))) {
1457                     // visibility shortcut
1458                     continue;
1459                 }
1460             } else {
1461                 if (!file_exists("$CFG->dirroot/mod/$mod->modname/lib.php")) {
1462                     // module not installed
1463                     continue;
1464                 }
1465                 if (!coursemodule_visible_for_user($mod) &&
1466                     empty($mod->showavailability)) {
1467                     // full visibility check
1468                     continue;
1469                 }
1470             }
1471
1472             if (!isset($modulenames[$mod->modname])) {
1473                 $modulenames[$mod->modname] = get_string('modulename', $mod->modname);
1474             }
1475             $modulename = $modulenames[$mod->modname];
1476
1477             // In some cases the activity is visible to user, but it is
1478             // dimmed. This is done if viewhiddenactivities is true and if:
1479             // 1. the activity is not visible, or
1480             // 2. the activity has dates set which do not include current, or
1481             // 3. the activity has any other conditions set (regardless of whether
1482             //    current user meets them)
1483             $canviewhidden = has_capability(
1484                 'moodle/course:viewhiddenactivities',
1485                 get_context_instance(CONTEXT_MODULE, $mod->id));
1486             $accessiblebutdim = false;
1487             if ($canviewhidden) {
1488                 $accessiblebutdim = !$mod->visible;
1489                 if (!empty($CFG->enableavailability)) {
1490                     $accessiblebutdim = $accessiblebutdim ||
1491                         $mod->availablefrom > time() ||
1492                         ($mod->availableuntil && $mod->availableuntil < time()) ||
1493                         count($mod->conditionsgrade) > 0 ||
1494                         count($mod->conditionscompletion) > 0;
1495                 }
1496             }
1497
1498             $liclasses = array();
1499             $liclasses[] = 'activity';
1500             $liclasses[] = $mod->modname;
1501             $liclasses[] = 'modtype_'.$mod->modname;
1502             $extraclasses = $mod->get_extra_classes();
1503             if ($extraclasses) {
1504                 $liclasses = array_merge($liclasses, explode(' ', $extraclasses));
1505             }
1506             echo html_writer::start_tag('li', array('class'=>join(' ', $liclasses), 'id'=>'module-'.$modnumber));
1507             if ($ismoving) {
1508                 echo '<a title="'.$strmovefull.'"'.
1509                      ' href="'.$CFG->wwwroot.'/course/mod.php?moveto='.$mod->id.'&amp;sesskey='.sesskey().'">'.
1510                      '<img class="movetarget" src="'.$OUTPUT->pix_url('movehere') . '" '.
1511                      ' alt="'.$strmovehere.'" /></a><br />
1512                      ';
1513             }
1514
1515             $classes = array('mod-indent');
1516             if (!empty($mod->indent)) {
1517                 $classes[] = 'mod-indent-'.$mod->indent;
1518                 if ($mod->indent > 15) {
1519                     $classes[] = 'mod-indent-huge';
1520                 }
1521             }
1522             echo html_writer::start_tag('div', array('class'=>join(' ', $classes)));
1523
1524             // Get data about this course-module
1525             list($content, $instancename) =
1526                     get_print_section_cm_text($modinfo->cms[$modnumber], $course);
1527
1528             //Accessibility: for files get description via icon, this is very ugly hack!
1529             $altname = '';
1530             $altname = $mod->modfullname;
1531             if (!empty($customicon)) {
1532                 $archetype = plugin_supports('mod', $mod->modname, FEATURE_MOD_ARCHETYPE, MOD_ARCHETYPE_OTHER);
1533                 if ($archetype == MOD_ARCHETYPE_RESOURCE) {
1534                     $mimetype = mimeinfo_from_icon('type', $customicon);
1535                     $altname = get_mimetype_description($mimetype);
1536                 }
1537             }
1538             // Avoid unnecessary duplication: if e.g. a forum name already
1539             // includes the word forum (or Forum, etc) then it is unhelpful
1540             // to include that in the accessible description that is added.
1541             if (false !== strpos($tl->strtolower($instancename),
1542                     $tl->strtolower($altname))) {
1543                 $altname = '';
1544             }
1545             // File type after name, for alphabetic lists (screen reader).
1546             if ($altname) {
1547                 $altname = get_accesshide(' '.$altname);
1548             }
1549
1550             // We may be displaying this just in order to show information
1551             // about visibility, without the actual link
1552             $contentpart = '';
1553             if ($mod->uservisible) {
1554                 // Nope - in this case the link is fully working for user
1555                 $linkclasses = '';
1556                 $textclasses = '';
1557                 if ($accessiblebutdim) {
1558                     $linkclasses .= ' dimmed';
1559                     $textclasses .= ' dimmed_text';
1560                     $accesstext = '<span class="accesshide">'.
1561                         get_string('hiddenfromstudents').': </span>';
1562                 } else {
1563                     $accesstext = '';
1564                 }
1565                 if ($linkclasses) {
1566                     $linkcss = 'class="' . trim($linkclasses) . '" ';
1567                 } else {
1568                     $linkcss = '';
1569                 }
1570                 if ($textclasses) {
1571                     $textcss = 'class="' . trim($textclasses) . '" ';
1572                 } else {
1573                     $textcss = '';
1574                 }
1575
1576                 // Get on-click attribute value if specified
1577                 $onclick = $mod->get_on_click();
1578                 if ($onclick) {
1579                     $onclick = ' onclick="' . $onclick . '"';
1580                 }
1581
1582                 if ($url = $mod->get_url()) {
1583                     // Display link itself
1584                     echo '<a ' . $linkcss . $mod->extra . $onclick .
1585                             ' href="' . $url . '"><img src="' . $mod->get_icon_url() .
1586                             '" class="activityicon" alt="' .
1587                             $modulename . '" /> ' .
1588                             $accesstext . '<span class="instancename">' .
1589                             $instancename . $altname . '</span></a>';
1590
1591                     // If specified, display extra content after link
1592                     if ($content) {
1593                         $contentpart = '<div class="contentafterlink' .
1594                                 trim($textclasses) . '">' . $content . '</div>';
1595                     }
1596                 } else {
1597                     // No link, so display only content
1598                     $contentpart = '<div ' . $textcss . $mod->extra . '>' .
1599                             $accesstext . $content . '</div>';
1600                 }
1601
1602                 if (!empty($mod->groupingid) && has_capability('moodle/course:managegroups', get_context_instance(CONTEXT_COURSE, $course->id))) {
1603                     if (!isset($groupings)) {
1604                         $groupings = groups_get_all_groupings($course->id);
1605                     }
1606                     echo " <span class=\"groupinglabel\">(".format_string($groupings[$mod->groupingid]->name).')</span>';
1607                 }
1608             } else {
1609                 $textclasses = $extraclasses;
1610                 $textclasses .= ' dimmed_text';
1611                 if ($textclasses) {
1612                     $textcss = 'class="' . trim($textclasses) . '" ';
1613                 } else {
1614                     $textcss = '';
1615                 }
1616                 $accesstext = '<span class="accesshide">' .
1617                         get_string('notavailableyet', 'condition') .
1618                         ': </span>';
1619
1620                 if ($url = $mod->get_url()) {
1621                     // Display greyed-out text of link
1622                     echo '<div ' . $textcss . $mod->extra .
1623                             ' >' . '<img src="' . $mod->get_icon_url() .
1624                             '" class="activityicon" alt="' .
1625                             $modulename .
1626                             '" /> <span>'. $instancename . $altname .
1627                             '</span></div>';
1628
1629                     // Do not display content after link when it is greyed out like this.
1630                 } else {
1631                     // No link, so display only content (also greyed)
1632                     $contentpart = '<div ' . $textcss . $mod->extra . '>' .
1633                             $accesstext . $content . '</div>';
1634                 }
1635             }
1636
1637             // Module can put text after the link (e.g. forum unread)
1638             echo $mod->get_after_link();
1639
1640             // If there is content but NO link (eg label), then display the
1641             // content here (BEFORE any icons). In this case cons must be
1642             // displayed after the content so that it makes more sense visually
1643             // and for accessibility reasons, e.g. if you have a one-line label
1644             // it should work similarly (at least in terms of ordering) to an
1645             // activity.
1646             if (empty($url)) {
1647                 echo $contentpart;
1648             }
1649
1650             if ($isediting) {
1651                 if ($groupbuttons and plugin_supports('mod', $mod->modname, FEATURE_GROUPS, 0)) {
1652                     if (! $mod->groupmodelink = $groupbuttonslink) {
1653                         $mod->groupmode = $course->groupmode;
1654                     }
1655
1656                 } else {
1657                     $mod->groupmode = false;
1658                 }
1659                 echo '&nbsp;&nbsp;';
1660                 echo make_editing_buttons($mod, $absolute, true, $mod->indent, $section->section);
1661                 echo $mod->get_after_edit_icons();
1662             }
1663
1664             // Completion
1665             $completion = $hidecompletion
1666                 ? COMPLETION_TRACKING_NONE
1667                 : $completioninfo->is_enabled($mod);
1668             if ($completion!=COMPLETION_TRACKING_NONE && isloggedin() &&
1669                 !isguestuser() && $mod->uservisible) {
1670                 $completiondata = $completioninfo->get_data($mod,true);
1671                 $completionicon = '';
1672                 if ($isediting) {
1673                     switch ($completion) {
1674                         case COMPLETION_TRACKING_MANUAL :
1675                             $completionicon = 'manual-enabled'; break;
1676                         case COMPLETION_TRACKING_AUTOMATIC :
1677                             $completionicon = 'auto-enabled'; break;
1678                         default: // wtf
1679                     }
1680                 } else if ($completion==COMPLETION_TRACKING_MANUAL) {
1681                     switch($completiondata->completionstate) {
1682                         case COMPLETION_INCOMPLETE:
1683                             $completionicon = 'manual-n'; break;
1684                         case COMPLETION_COMPLETE:
1685                             $completionicon = 'manual-y'; break;
1686                     }
1687                 } else { // Automatic
1688                     switch($completiondata->completionstate) {
1689                         case COMPLETION_INCOMPLETE:
1690                             $completionicon = 'auto-n'; break;
1691                         case COMPLETION_COMPLETE:
1692                             $completionicon = 'auto-y'; break;
1693                         case COMPLETION_COMPLETE_PASS:
1694                             $completionicon = 'auto-pass'; break;
1695                         case COMPLETION_COMPLETE_FAIL:
1696                             $completionicon = 'auto-fail'; break;
1697                     }
1698                 }
1699                 if ($completionicon) {
1700                     $imgsrc = $OUTPUT->pix_url('i/completion-'.$completionicon);
1701                     $imgalt = s(get_string('completion-alt-'.$completionicon, 'completion'));
1702                     if ($completion == COMPLETION_TRACKING_MANUAL && !$isediting) {
1703                         $imgtitle = s(get_string('completion-title-'.$completionicon, 'completion'));
1704                         $newstate =
1705                             $completiondata->completionstate==COMPLETION_COMPLETE
1706                             ? COMPLETION_INCOMPLETE
1707                             : COMPLETION_COMPLETE;
1708                         // In manual mode the icon is a toggle form...
1709
1710                         // If this completion state is used by the
1711                         // conditional activities system, we need to turn
1712                         // off the JS.
1713                         if (!empty($CFG->enableavailability) &&
1714                             condition_info::completion_value_used_as_condition($course, $mod)) {
1715                             $extraclass = ' preventjs';
1716                         } else {
1717                             $extraclass = '';
1718                         }
1719                         echo "
1720 <form class='togglecompletion$extraclass' method='post' action='".$CFG->wwwroot."/course/togglecompletion.php'><div>
1721 <input type='hidden' name='id' value='{$mod->id}' />
1722 <input type='hidden' name='sesskey' value='".sesskey()."' />
1723 <input type='hidden' name='completionstate' value='$newstate' />
1724 <input type='image' src='$imgsrc' alt='$imgalt' title='$imgtitle' />
1725 </div></form>";
1726                     } else {
1727                         // In auto mode, or when editing, the icon is just an image
1728                         echo "<span class='autocompletion'>";
1729                         echo "<img src='$imgsrc' alt='$imgalt' title='$imgalt' /></span>";
1730                     }
1731                 }
1732             }
1733
1734             // If there is content AND a link, then display the content here
1735             // (AFTER any icons). Otherwise it was displayed before
1736             if (!empty($url)) {
1737                 echo $contentpart;
1738             }
1739
1740             // Show availability information (for someone who isn't allowed to
1741             // see the activity itself, or for staff)
1742             if (!$mod->uservisible) {
1743                 echo '<div class="availabilityinfo">'.$mod->availableinfo.'</div>';
1744             } else if ($canviewhidden && !empty($CFG->enableavailability)) {
1745                 $ci = new condition_info($mod);
1746                 $fullinfo = $ci->get_full_information();
1747                 if($fullinfo) {
1748                     echo '<div class="availabilityinfo">'.get_string($mod->showavailability
1749                         ? 'userrestriction_visible'
1750                         : 'userrestriction_hidden','condition',
1751                         $fullinfo).'</div>';
1752                 }
1753             }
1754
1755             echo html_writer::end_tag('div');
1756             echo html_writer::end_tag('li')."\n";
1757         }
1758
1759     } elseif ($ismoving) {
1760         echo "<ul class=\"section\">\n";
1761     }
1762
1763     if ($ismoving) {
1764         echo '<li><a title="'.$strmovefull.'"'.
1765              ' href="'.$CFG->wwwroot.'/course/mod.php?movetosection='.$section->id.'&amp;sesskey='.sesskey().'">'.
1766              '<img class="movetarget" src="'.$OUTPUT->pix_url('movehere') . '" '.
1767              ' alt="'.$strmovehere.'" /></a></li>
1768              ';
1769     }
1770     if (!empty($section->sequence) || $ismoving) {
1771         echo "</ul><!--class='section'-->\n\n";
1772     }
1773 }
1774
1775 /**
1776  * Prints the menus to add activities and resources.
1777  */
1778 function print_section_add_menus($course, $section, $modnames, $vertical=false, $return=false) {
1779     global $CFG, $OUTPUT;
1780
1781     // check to see if user can add menus
1782     if (!has_capability('moodle/course:manageactivities', get_context_instance(CONTEXT_COURSE, $course->id))) {
1783         return false;
1784     }
1785
1786     $urlbase = "/course/mod.php?id=$course->id&section=$section&sesskey=".sesskey().'&add=';
1787
1788     $resources = array();
1789     $activities = array();
1790
1791     foreach($modnames as $modname=>$modnamestr) {
1792         if (!course_allowed_module($course, $modname)) {
1793             continue;
1794         }
1795
1796         $libfile = "$CFG->dirroot/mod/$modname/lib.php";
1797         if (!file_exists($libfile)) {
1798             continue;
1799         }
1800         include_once($libfile);
1801         $gettypesfunc =  $modname.'_get_types';
1802         if (function_exists($gettypesfunc)) {
1803             // NOTE: this is legacy stuff, module subtypes are very strongly discouraged!!
1804             if ($types = $gettypesfunc()) {
1805                 $menu = array();
1806                 $atype = null;
1807                 $groupname = null;
1808                 foreach($types as $type) {
1809                     if ($type->typestr === '--') {
1810                         continue;
1811                     }
1812                     if (strpos($type->typestr, '--') === 0) {
1813                         $groupname = str_replace('--', '', $type->typestr);
1814                         continue;
1815                     }
1816                     $type->type = str_replace('&amp;', '&', $type->type);
1817                     if ($type->modclass == MOD_CLASS_RESOURCE) {
1818                         $atype = MOD_CLASS_RESOURCE;
1819                     }
1820                     $menu[$urlbase.$type->type] = $type->typestr;
1821                 }
1822                 if (!is_null($groupname)) {
1823                     if ($atype == MOD_CLASS_RESOURCE) {
1824                         $resources[] = array($groupname=>$menu);
1825                     } else {
1826                         $activities[] = array($groupname=>$menu);
1827                     }
1828                 } else {
1829                     if ($atype == MOD_CLASS_RESOURCE) {
1830                         $resources = array_merge($resources, $menu);
1831                     } else {
1832                         $activities = array_merge($activities, $menu);
1833                     }
1834                 }
1835             }
1836         } else {
1837             $archetype = plugin_supports('mod', $modname, FEATURE_MOD_ARCHETYPE, MOD_ARCHETYPE_OTHER);
1838             if ($archetype == MOD_ARCHETYPE_RESOURCE) {
1839                 $resources[$urlbase.$modname] = $modnamestr;
1840             } else {
1841                 // all other archetypes are considered activity
1842                 $activities[$urlbase.$modname] = $modnamestr;
1843             }
1844         }
1845     }
1846
1847     $straddactivity = get_string('addactivity');
1848     $straddresource = get_string('addresource');
1849
1850     $output  = '<div class="section_add_menus">';
1851
1852     if (!$vertical) {
1853         $output .= '<div class="horizontal">';
1854     }
1855
1856     if (!empty($resources)) {
1857         $select = new url_select($resources, '', array(''=>$straddresource), "ressection$section");
1858         $select->set_help_icon('resources');
1859         $output .= $OUTPUT->render($select);
1860     }
1861
1862     if (!empty($activities)) {
1863         $select = new url_select($activities, '', array(''=>$straddactivity), "section$section");
1864         $select->set_help_icon('activities');
1865         $output .= $OUTPUT->render($select);
1866     }
1867
1868     if (!$vertical) {
1869         $output .= '</div>';
1870     }
1871
1872     $output .= '</div>';
1873
1874     if ($return) {
1875         return $output;
1876     } else {
1877         echo $output;
1878     }
1879 }
1880
1881 /**
1882  * Return the course category context for the category with id $categoryid, except
1883  * that if $categoryid is 0, return the system context.
1884  *
1885  * @param integer $categoryid a category id or 0.
1886  * @return object the corresponding context
1887  */
1888 function get_category_or_system_context($categoryid) {
1889     if ($categoryid) {
1890         return get_context_instance(CONTEXT_COURSECAT, $categoryid);
1891     } else {
1892         return get_context_instance(CONTEXT_SYSTEM);
1893     }
1894 }
1895
1896 /**
1897  * Gets the child categories of a given courses category. Uses a static cache
1898  * to make repeat calls efficient.
1899  *
1900  * @param int $parentid the id of a course category.
1901  * @return array all the child course categories.
1902  */
1903 function get_child_categories($parentid) {
1904     static $allcategories = null;
1905
1906     // only fill in this variable the first time
1907     if (null == $allcategories) {
1908         $allcategories = array();
1909
1910         $categories = get_categories();
1911         foreach ($categories as $category) {
1912             if (empty($allcategories[$category->parent])) {
1913                 $allcategories[$category->parent] = array();
1914             }
1915             $allcategories[$category->parent][] = $category;
1916         }
1917     }
1918
1919     if (empty($allcategories[$parentid])) {
1920         return array();
1921     } else {
1922         return $allcategories[$parentid];
1923     }
1924 }
1925
1926 /**
1927  * This function recursively travels the categories, building up a nice list
1928  * for display. It also makes an array that list all the parents for each
1929  * category.
1930  *
1931  * For example, if you have a tree of categories like:
1932  *   Miscellaneous (id = 1)
1933  *      Subcategory (id = 2)
1934  *         Sub-subcategory (id = 4)
1935  *   Other category (id = 3)
1936  * Then after calling this function you will have
1937  * $list = array(1 => 'Miscellaneous', 2 => 'Miscellaneous / Subcategory',
1938  *      4 => 'Miscellaneous / Subcategory / Sub-subcategory',
1939  *      3 => 'Other category');
1940  * $parents = array(2 => array(1), 4 => array(1, 2));
1941  *
1942  * If you specify $requiredcapability, then only categories where the current
1943  * user has that capability will be added to $list, although all categories
1944  * will still be added to $parents, and if you only have $requiredcapability
1945  * in a child category, not the parent, then the child catgegory will still be
1946  * included.
1947  *
1948  * If you specify the option $excluded, then that category, and all its children,
1949  * are omitted from the tree. This is useful when you are doing something like
1950  * moving categories, where you do not want to allow people to move a category
1951  * to be the child of itself.
1952  *
1953  * @param array $list For output, accumulates an array categoryid => full category path name
1954  * @param array $parents For output, accumulates an array categoryid => list of parent category ids.
1955  * @param string/array $requiredcapability if given, only categories where the current
1956  *      user has this capability will be added to $list. Can also be an array of capabilities,
1957  *      in which case they are all required.
1958  * @param integer $excludeid Omit this category and its children from the lists built.
1959  * @param object $category Build the tree starting at this category - otherwise starts at the top level.
1960  * @param string $path For internal use, as part of recursive calls.
1961  */
1962 function make_categories_list(&$list, &$parents, $requiredcapability = '',
1963         $excludeid = 0, $category = NULL, $path = "") {
1964
1965     // initialize the arrays if needed
1966     if (!is_array($list)) {
1967         $list = array();
1968     }
1969     if (!is_array($parents)) {
1970         $parents = array();
1971     }
1972
1973     if (empty($category)) {
1974         // Start at the top level.
1975         $category = new stdClass;
1976         $category->id = 0;
1977     } else {
1978         // This is the excluded category, don't include it.
1979         if ($excludeid > 0 && $excludeid == $category->id) {
1980             return;
1981         }
1982
1983         // Update $path.
1984         if ($path) {
1985             $path = $path.' / '.format_string($category->name);
1986         } else {
1987             $path = format_string($category->name);
1988         }
1989
1990         // Add this category to $list, if the permissions check out.
1991         if (empty($requiredcapability)) {
1992             $list[$category->id] = $path;
1993
1994         } else {
1995             ensure_context_subobj_present($category, CONTEXT_COURSECAT);
1996             $requiredcapability = (array)$requiredcapability;
1997             if (has_all_capabilities($requiredcapability, $category->context)) {
1998                 $list[$category->id] = $path;
1999             }
2000         }
2001     }
2002
2003     // Add all the children recursively, while updating the parents array.
2004     if ($categories = get_child_categories($category->id)) {
2005         foreach ($categories as $cat) {
2006             if (!empty($category->id)) {
2007                 if (isset($parents[$category->id])) {
2008                     $parents[$cat->id]   = $parents[$category->id];
2009                 }
2010                 $parents[$cat->id][] = $category->id;
2011             }
2012             make_categories_list($list, $parents, $requiredcapability, $excludeid, $cat, $path);
2013         }
2014     }
2015 }
2016
2017 /**
2018  * This function generates a structured array of courses and categories.
2019  *
2020  * The depth of categories is limited by $CFG->maxcategorydepth however there
2021  * is no limit on the number of courses!
2022  *
2023  * Suitable for use with the course renderers course_category_tree method:
2024  * $renderer = $PAGE->get_renderer('core','course');
2025  * echo $renderer->course_category_tree(get_course_category_tree());
2026  *
2027  * @global moodle_database $DB
2028  * @param int $id
2029  * @param int $depth
2030  */
2031 function get_course_category_tree($id = 0, $depth = 0) {
2032     global $DB, $CFG;
2033     $viewhiddencats = has_capability('moodle/category:viewhiddencategories', get_context_instance(CONTEXT_SYSTEM));
2034     $categories = get_child_categories($id);
2035     $categoryids = array();
2036     foreach ($categories as $key => &$category) {
2037         if (!$category->visible && !$viewhiddencats) {
2038             unset($categories[$key]);
2039             continue;
2040         }
2041         $categoryids[$category->id] = $category;
2042         if (empty($CFG->maxcategorydepth) || $depth <= $CFG->maxcategorydepth) {
2043             list($category->categories, $subcategories) = get_course_category_tree($category->id, $depth+1);
2044             foreach ($subcategories as $subid=>$subcat) {
2045                 $categoryids[$subid] = $subcat;
2046             }
2047             $category->courses = array();
2048         }
2049     }
2050
2051     if ($depth > 0) {
2052         // This is a recursive call so return the required array
2053         return array($categories, $categoryids);
2054     }
2055
2056     // The depth is 0 this function has just been called so we can finish it off
2057
2058     list($ccselect, $ccjoin) = context_instance_preload_sql('c.id', CONTEXT_COURSE, 'ctx');
2059     list($catsql, $catparams) = $DB->get_in_or_equal(array_keys($categoryids));
2060     $sql = "SELECT
2061             c.id,c.sortorder,c.visible,c.fullname,c.shortname,c.summary,c.category
2062             $ccselect
2063             FROM {course} c
2064             $ccjoin
2065             WHERE c.category $catsql ORDER BY c.sortorder ASC";
2066     if ($courses = $DB->get_records_sql($sql, $catparams)) {
2067         // loop throught them
2068         foreach ($courses as $course) {
2069             if ($course->id == SITEID) {
2070                 continue;
2071             }
2072             context_instance_preload($course);
2073             if (!empty($course->visible) || has_capability('moodle/course:viewhiddencourses', get_context_instance(CONTEXT_COURSE, $course->id))) {
2074                 $categoryids[$course->category]->courses[$course->id] = $course;
2075             }
2076         }
2077     }
2078     return $categories;
2079 }
2080
2081 /**
2082  * Recursive function to print out all the categories in a nice format
2083  * with or without courses included
2084  */
2085 function print_whole_category_list($category=NULL, $displaylist=NULL, $parentslist=NULL, $depth=-1, $showcourses = true) {
2086     global $CFG;
2087
2088     // maxcategorydepth == 0 meant no limit
2089     if (!empty($CFG->maxcategorydepth) && $depth >= $CFG->maxcategorydepth) {
2090         return;
2091     }
2092
2093     if (!$displaylist) {
2094         make_categories_list($displaylist, $parentslist);
2095     }
2096
2097     if ($category) {
2098         if ($category->visible or has_capability('moodle/category:viewhiddencategories', get_context_instance(CONTEXT_SYSTEM))) {
2099             print_category_info($category, $depth, $showcourses);
2100         } else {
2101             return;  // Don't bother printing children of invisible categories
2102         }
2103
2104     } else {
2105         $category->id = "0";
2106     }
2107
2108     if ($categories = get_child_categories($category->id)) {   // Print all the children recursively
2109         $countcats = count($categories);
2110         $count = 0;
2111         $first = true;
2112         $last = false;
2113         foreach ($categories as $cat) {
2114             $count++;
2115             if ($count == $countcats) {
2116                 $last = true;
2117             }
2118             $up = $first ? false : true;
2119             $down = $last ? false : true;
2120             $first = false;
2121
2122             print_whole_category_list($cat, $displaylist, $parentslist, $depth + 1, $showcourses);
2123         }
2124     }
2125 }
2126
2127 /**
2128  * This function will return $options array for html_writer::select(), with whitespace to denote nesting.
2129  */
2130 function make_categories_options() {
2131     make_categories_list($cats,$parents);
2132     foreach ($cats as $key => $value) {
2133         if (array_key_exists($key,$parents)) {
2134             if ($indent = count($parents[$key])) {
2135                 for ($i = 0; $i < $indent; $i++) {
2136                     $cats[$key] = '&nbsp;'.$cats[$key];
2137                 }
2138             }
2139         }
2140     }
2141     return $cats;
2142 }
2143
2144 /**
2145  * Prints the category info in indented fashion
2146  * This function is only used by print_whole_category_list() above
2147  */
2148 function print_category_info($category, $depth=0, $showcourses = false) {
2149     global $CFG, $DB, $OUTPUT;
2150
2151     $strsummary = get_string('summary');
2152
2153     $catlinkcss = null;
2154     if (!$category->visible) {
2155         $catlinkcss = array('class'=>'dimmed');
2156     }
2157     static $coursecount = null;
2158     if (null === $coursecount) {
2159         // only need to check this once
2160         $coursecount = $DB->count_records('course') <= FRONTPAGECOURSELIMIT;
2161     }
2162
2163     if ($showcourses and $coursecount) {
2164         $catimage = '<img src="'.$OUTPUT->pix_url('i/course') . '" alt="" />';
2165     } else {
2166         $catimage = "&nbsp;";
2167     }
2168
2169     $courses = get_courses($category->id, 'c.sortorder ASC', 'c.id,c.sortorder,c.visible,c.fullname,c.shortname,c.summary');
2170     if ($showcourses and $coursecount) {
2171         echo '<div class="categorylist clearfix">';
2172         $cat = '';
2173         $cat .= html_writer::tag('div', $catimage, array('class'=>'image'));
2174         $catlink = html_writer::link(new moodle_url('/course/category.php', array('id'=>$category->id)), format_string($category->name), $catlinkcss);
2175         $cat .= html_writer::tag('div', $catlink, array('class'=>'name'));
2176
2177         $html = '';
2178         if ($depth > 0) {
2179             for ($i=0; $i< $depth; $i++) {
2180                 $html = html_writer::tag('div', $html . $cat, array('class'=>'indentation'));
2181                 $cat = '';
2182             }
2183         } else {
2184             $html = $cat;
2185         }
2186         echo html_writer::tag('div', $html, array('class'=>'category'));
2187         echo html_writer::tag('div', '', array('class'=>'clearfloat'));
2188
2189         // does the depth exceed maxcategorydepth
2190         // maxcategorydepth == 0 or unset meant no limit
2191         $limit = !(isset($CFG->maxcategorydepth) && ($depth >= $CFG->maxcategorydepth-1));
2192         if ($courses && ($limit || $CFG->maxcategorydepth == 0)) {
2193             foreach ($courses as $course) {
2194                 $linkcss = null;
2195                 if (!$course->visible) {
2196                     $linkcss = array('class'=>'dimmed');
2197                 }
2198
2199                 $courselink = html_writer::link(new moodle_url('/course/view.php', array('id'=>$course->id)), format_string($course->fullname), $linkcss);
2200
2201                 // print enrol info
2202                 $courseicon = '';
2203                 if ($icons = enrol_get_course_info_icons($course)) {
2204                     foreach ($icons as $pix_icon) {
2205                         $courseicon = $OUTPUT->render($pix_icon).' ';
2206                     }
2207                 }
2208
2209                 $coursecontent = html_writer::tag('div', $courseicon.$courselink, array('class'=>'name'));
2210
2211                 if ($course->summary) {
2212                     $link = new moodle_url('/course/info.php?id='.$course->id);
2213                     $actionlink = $OUTPUT->action_link($link, '<img alt="'.$strsummary.'" src="'.$OUTPUT->pix_url('i/info') . '" />',
2214                         new popup_action('click', $link, 'courseinfo', array('height' => 400, 'width' => 500)),
2215                         array('title'=>$strsummary));
2216
2217                     $coursecontent .= html_writer::tag('div', $actionlink, array('class'=>'info'));
2218                 }
2219
2220                 $html = '';
2221                 for ($i=0; $i <= $depth; $i++) {
2222                     $html = html_writer::tag('div', $html . $coursecontent , array('class'=>'indentation'));
2223                     $coursecontent = '';
2224                 }
2225                 echo html_writer::tag('div', $html, array('class'=>'course clearfloat'));
2226             }
2227         }
2228         echo '</div>';
2229     } else {
2230         echo '<div class="categorylist">';
2231         $html = '';
2232         $cat = html_writer::link(new moodle_url('/course/category.php', array('id'=>$category->id)), format_string($category->name), $catlinkcss);
2233         $cat .= html_writer::tag('span', ' ('.count($courses).')', array('title'=>get_string('numberofcourses'), 'class'=>'numberofcourse'));
2234
2235         if ($depth > 0) {
2236             for ($i=0; $i< $depth; $i++) {
2237                 $html = html_writer::tag('div', $html .$cat, array('class'=>'indentation'));
2238                 $cat = '';
2239             }
2240         } else {
2241             $html = $cat;
2242         }
2243
2244         echo html_writer::tag('div', $html, array('class'=>'category'));
2245         echo html_writer::tag('div', '', array('class'=>'clearfloat'));
2246         echo '</div>';
2247     }
2248 }
2249
2250 /**
2251  * Print the buttons relating to course requests.
2252  *
2253  * @param object $systemcontext the system context.
2254  */
2255 function print_course_request_buttons($systemcontext) {
2256     global $CFG, $DB, $OUTPUT;
2257     if (empty($CFG->enablecourserequests)) {
2258         return;
2259     }
2260     if (!has_capability('moodle/course:create', $systemcontext) && has_capability('moodle/course:request', $systemcontext)) {
2261     /// Print a button to request a new course
2262         echo $OUTPUT->single_button('request.php', get_string('requestcourse'), 'get');
2263     }
2264     /// Print a button to manage pending requests
2265     if (has_capability('moodle/site:approvecourse', $systemcontext)) {
2266         $disabled = !$DB->record_exists('course_request', array());
2267         echo $OUTPUT->single_button('pending.php', get_string('coursespending'), 'get', array('disabled'=>$disabled));
2268     }
2269 }
2270
2271 /**
2272  * Does the user have permission to edit things in this category?
2273  *
2274  * @param integer $categoryid The id of the category we are showing, or 0 for system context.
2275  * @return boolean has_any_capability(array(...), ...); in the appropriate context.
2276  */
2277 function can_edit_in_category($categoryid = 0) {
2278     $context = get_category_or_system_context($categoryid);
2279     return has_any_capability(array('moodle/category:manage', 'moodle/course:create'), $context);
2280 }
2281
2282 /**
2283  * Prints the turn editing on/off button on course/index.php or course/category.php.
2284  *
2285  * @param integer $categoryid The id of the category we are showing, or 0 for system context.
2286  * @return string HTML of the editing button, or empty string, if this user is not allowed
2287  *      to see it.
2288  */
2289 function update_category_button($categoryid = 0) {
2290     global $CFG, $PAGE, $OUTPUT;
2291
2292     // Check permissions.
2293     if (!can_edit_in_category($categoryid)) {
2294         return '';
2295     }
2296
2297     // Work out the appropriate action.
2298     if ($PAGE->user_is_editing()) {
2299         $label = get_string('turneditingoff');
2300         $edit = 'off';
2301     } else {
2302         $label = get_string('turneditingon');
2303         $edit = 'on';
2304     }
2305
2306     // Generate the button HTML.
2307     $options = array('categoryedit' => $edit, 'sesskey' => sesskey());
2308     if ($categoryid) {
2309         $options['id'] = $categoryid;
2310         $page = 'category.php';
2311     } else {
2312         $page = 'index.php';
2313     }
2314     return $OUTPUT->single_button(new moodle_url('/course/' . $page, $options), $label, 'get');
2315 }
2316
2317 /**
2318  * Category is 0 (for all courses) or an object
2319  */
2320 function print_courses($category) {
2321     global $CFG, $OUTPUT;
2322
2323     if (!is_object($category) && $category==0) {
2324         $categories = get_child_categories(0);  // Parent = 0   ie top-level categories only
2325         if (is_array($categories) && count($categories) == 1) {
2326             $category   = array_shift($categories);
2327             $courses    = get_courses_wmanagers($category->id,
2328                                                 'c.sortorder ASC',
2329                                                 array('summary','summaryformat'));
2330         } else {
2331             $courses    = get_courses_wmanagers('all',
2332                                                 'c.sortorder ASC',
2333                                                 array('summary','summaryformat'));
2334         }
2335         unset($categories);
2336     } else {
2337         $courses    = get_courses_wmanagers($category->id,
2338                                             'c.sortorder ASC',
2339                                             array('summary','summaryformat'));
2340     }
2341
2342     if ($courses) {
2343         echo html_writer::start_tag('ul', array('class'=>'unlist'));
2344         foreach ($courses as $course) {
2345             $coursecontext = get_context_instance(CONTEXT_COURSE, $course->id);
2346             if ($course->visible == 1 || has_capability('moodle/course:viewhiddencourses', $coursecontext)) {
2347                 echo html_writer::start_tag('li');
2348                 print_course($course);
2349                 echo html_writer::end_tag('li');
2350             }
2351         }
2352         echo html_writer::end_tag('ul');
2353     } else {
2354         echo $OUTPUT->heading(get_string("nocoursesyet"));
2355         $context = get_context_instance(CONTEXT_SYSTEM);
2356         if (has_capability('moodle/course:create', $context)) {
2357             $options = array();
2358             if (!empty($category->id)) {
2359                 $options['category'] = $category->id;
2360             } else {
2361                 $options['category'] = $CFG->defaultrequestcategory;
2362             }
2363             echo html_writer::start_tag('div', array('class'=>'addcoursebutton'));
2364             echo $OUTPUT->single_button(new moodle_url('/course/edit.php', $options), get_string("addnewcourse"));
2365             echo html_writer::end_tag('div');
2366         }
2367     }
2368 }
2369
2370 /**
2371  * Print a description of a course, suitable for browsing in a list.
2372  *
2373  * @param object $course the course object.
2374  * @param string $highlightterms (optional) some search terms that should be highlighted in the display.
2375  */
2376 function print_course($course, $highlightterms = '') {
2377     global $CFG, $USER, $DB, $OUTPUT;
2378
2379     $context = get_context_instance(CONTEXT_COURSE, $course->id);
2380
2381     // Rewrite file URLs so that they are correct
2382     $course->summary = file_rewrite_pluginfile_urls($course->summary, 'pluginfile.php', $context->id, 'course', 'summary', NULL);
2383
2384     echo html_writer::start_tag('div', array('class'=>'coursebox clearfix'));
2385     echo html_writer::start_tag('div', array('class'=>'info'));
2386     echo html_writer::start_tag('h3', array('class'=>'name'));
2387
2388     $linkhref = new moodle_url('/course/view.php', array('id'=>$course->id));
2389     $linktext = highlight($highlightterms, format_string($course->fullname));
2390     $linkparams = array('title'=>get_string('entercourse'));
2391     if (empty($course->visible)) {
2392         $linkparams['class'] = 'dimmed';
2393     }
2394     echo html_writer::link($linkhref, $linktext, $linkparams);
2395     echo html_writer::end_tag('h3');
2396
2397     /// first find all roles that are supposed to be displayed
2398     if (!empty($CFG->coursecontact)) {
2399         $managerroles = explode(',', $CFG->coursecontact);
2400         $namesarray = array();
2401         if (isset($course->managers)) {
2402             if (count($course->managers)) {
2403                 $rusers = $course->managers;
2404                 $canviewfullnames = has_capability('moodle/site:viewfullnames', $context);
2405
2406                  /// Rename some of the role names if needed
2407                 if (isset($context)) {
2408                     $aliasnames = $DB->get_records('role_names', array('contextid'=>$context->id), '', 'roleid,contextid,name');
2409                 }
2410
2411                 // keep a note of users displayed to eliminate duplicates
2412                 $usersshown = array();
2413                 foreach ($rusers as $ra) {
2414
2415                     // if we've already displayed user don't again
2416                     if (in_array($ra->user->id,$usersshown)) {
2417                         continue;
2418                     }
2419                     $usersshown[] = $ra->user->id;
2420
2421                     $fullname = fullname($ra->user, $canviewfullnames);
2422
2423                     if (isset($aliasnames[$ra->roleid])) {
2424                         $ra->rolename = $aliasnames[$ra->roleid]->name;
2425                     }
2426
2427                     $namesarray[] = format_string($ra->rolename).': '.
2428                                     html_writer::link(new moodle_url('/user/view.php', array('id'=>$ra->user->id, 'course'=>SITEID)), $fullname);
2429                 }
2430             }
2431         } else {
2432             $rusers = get_role_users($managerroles, $context,
2433                                      true, '', 'r.sortorder ASC, u.lastname ASC');
2434             if (is_array($rusers) && count($rusers)) {
2435                 $canviewfullnames = has_capability('moodle/site:viewfullnames', $context);
2436
2437                 /// Rename some of the role names if needed
2438                 if (isset($context)) {
2439                     $aliasnames = $DB->get_records('role_names', array('contextid'=>$context->id), '', 'roleid,contextid,name');
2440                 }
2441
2442                 foreach ($rusers as $teacher) {
2443                     $fullname = fullname($teacher, $canviewfullnames);
2444
2445                     /// Apply role names
2446                     if (isset($aliasnames[$teacher->roleid])) {
2447                         $teacher->rolename = $aliasnames[$teacher->roleid]->name;
2448                     }
2449
2450                     $namesarray[] = format_string($teacher->rolename).': '.
2451                                     html_writer::link(new moodle_url('/user/view.php', array('id'=>$teacher->id, 'course'=>SITEID)), $fullname);
2452                 }
2453             }
2454         }
2455
2456         if (!empty($namesarray)) {
2457             echo html_writer::start_tag('ul', array('class'=>'teachers'));
2458             foreach ($namesarray as $name) {
2459                 echo html_writer::tag('li', $name);
2460             }
2461             echo html_writer::end_tag('ul');
2462         }
2463     }
2464     echo html_writer::end_tag('div'); // End of info div
2465
2466     echo html_writer::start_tag('div', array('class'=>'summary'));
2467     $options = NULL;
2468     $options->noclean = true;
2469     $options->para = false;
2470     $options->overflowdiv = true;
2471     if (!isset($course->summaryformat)) {
2472         $course->summaryformat = FORMAT_MOODLE;
2473     }
2474     echo highlight($highlightterms, format_text($course->summary, $course->summaryformat, $options,  $course->id));
2475     if ((!isloggedin() || is_siteadmin()) && $icons = enrol_get_course_info_icons($course)) {
2476         echo html_writer::start_tag('div', array('class'=>'enrolmenticons'));
2477         foreach ($icons as $icon) {
2478             echo $OUTPUT->render($icon);
2479         }
2480         echo html_writer::end_tag('div'); // End of enrolmenticons div
2481     }
2482     echo html_writer::end_tag('div'); // End of summary div
2483     echo html_writer::end_tag('div'); // End of coursebox div
2484 }
2485
2486 /**
2487  * Prints custom user information on the home page.
2488  * Over time this can include all sorts of information
2489  */
2490 function print_my_moodle() {
2491     global $USER, $CFG, $DB, $OUTPUT;
2492
2493     if (!isloggedin() or isguestuser()) {
2494         print_error('nopermissions', '', '', 'See My Moodle');
2495     }
2496
2497     $courses  = enrol_get_my_courses('summary', 'visible DESC,sortorder ASC');
2498     $rhosts   = array();
2499     $rcourses = array();
2500     if (!empty($CFG->mnet_dispatcher_mode) && $CFG->mnet_dispatcher_mode==='strict') {
2501         $rcourses = get_my_remotecourses($USER->id);
2502         $rhosts   = get_my_remotehosts();
2503     }
2504
2505     if (!empty($courses) || !empty($rcourses) || !empty($rhosts)) {
2506
2507         if (!empty($courses)) {
2508             echo '<ul class="unlist">';
2509             foreach ($courses as $course) {
2510                 if ($course->id == SITEID) {
2511                     continue;
2512                 }
2513                 echo '<li>';
2514                 print_course($course);
2515                 echo "</li>\n";
2516             }
2517             echo "</ul>\n";
2518         }
2519
2520         // MNET
2521         if (!empty($rcourses)) {
2522             // at the IDP, we know of all the remote courses
2523             foreach ($rcourses as $course) {
2524                 print_remote_course($course, "100%");
2525             }
2526         } elseif (!empty($rhosts)) {
2527             // non-IDP, we know of all the remote servers, but not courses
2528             foreach ($rhosts as $host) {
2529                 print_remote_host($host, "100%");
2530             }
2531         }
2532         unset($course);
2533         unset($host);
2534
2535         if ($DB->count_records("course") > (count($courses) + 1) ) {  // Some courses not being displayed
2536             echo "<table width=\"100%\"><tr><td align=\"center\">";
2537             print_course_search("", false, "short");
2538             echo "</td><td align=\"center\">";
2539             echo $OUTPUT->single_button("$CFG->wwwroot/course/index.php", get_string("fulllistofcourses"), "get");
2540             echo "</td></tr></table>\n";
2541         }
2542
2543     } else {
2544         if ($DB->count_records("course_categories") > 1) {
2545             echo $OUTPUT->box_start("categorybox");
2546             print_whole_category_list();
2547             echo $OUTPUT->box_end();
2548         } else {
2549             print_courses(0);
2550         }
2551     }
2552 }
2553
2554
2555 function print_course_search($value="", $return=false, $format="plain") {
2556     global $CFG;
2557     static $count = 0;
2558
2559     $count++;
2560
2561     $id = 'coursesearch';
2562
2563     if ($count > 1) {
2564         $id .= $count;
2565     }
2566
2567     $strsearchcourses= get_string("searchcourses");
2568
2569     if ($format == 'plain') {
2570         $output  = '<form id="'.$id.'" action="'.$CFG->wwwroot.'/course/search.php" method="get">';
2571         $output .= '<fieldset class="coursesearchbox invisiblefieldset">';
2572         $output .= '<label for="coursesearchbox">'.$strsearchcourses.': </label>';
2573         $output .= '<input type="text" id="coursesearchbox" size="30" name="search" value="'.s($value).'" />';
2574         $output .= '<input type="submit" value="'.get_string('go').'" />';
2575         $output .= '</fieldset></form>';
2576     } else if ($format == 'short') {
2577         $output  = '<form id="'.$id.'" action="'.$CFG->wwwroot.'/course/search.php" method="get">';
2578         $output .= '<fieldset class="coursesearchbox invisiblefieldset">';
2579         $output .= '<label for="shortsearchbox">'.$strsearchcourses.': </label>';
2580         $output .= '<input type="text" id="shortsearchbox" size="12" name="search" alt="'.s($strsearchcourses).'" value="'.s($value).'" />';
2581         $output .= '<input type="submit" value="'.get_string('go').'" />';
2582         $output .= '</fieldset></form>';
2583     } else if ($format == 'navbar') {
2584         $output  = '<form id="coursesearchnavbar" action="'.$CFG->wwwroot.'/course/search.php" method="get">';
2585         $output .= '<fieldset class="coursesearchbox invisiblefieldset">';
2586         $output .= '<label for="navsearchbox">'.$strsearchcourses.': </label>';
2587         $output .= '<input type="text" id="navsearchbox" size="20" name="search" alt="'.s($strsearchcourses).'" value="'.s($value).'" />';
2588         $output .= '<input type="submit" value="'.get_string('go').'" />';
2589         $output .= '</fieldset></form>';
2590     }
2591
2592     if ($return) {
2593         return $output;
2594     }
2595     echo $output;
2596 }
2597
2598 function print_remote_course($course, $width="100%") {
2599     global $CFG, $USER;
2600
2601     $linkcss = '';
2602
2603     $url = "{$CFG->wwwroot}/auth/mnet/jump.php?hostid={$course->hostid}&amp;wantsurl=/course/view.php?id={$course->remoteid}";
2604
2605     echo '<div class="coursebox remotecoursebox clearfix">';
2606     echo '<div class="info">';
2607     echo '<div class="name"><a title="'.get_string('entercourse').'"'.
2608          $linkcss.' href="'.$url.'">'
2609         .  format_string($course->fullname) .'</a><br />'
2610         . format_string($course->hostname) . ' : '
2611         . format_string($course->cat_name) . ' : '
2612         . format_string($course->shortname). '</div>';
2613     echo '</div><div class="summary">';
2614     $options = NULL;
2615     $options->noclean = true;
2616     $options->para = false;
2617     $options->overflowdiv = true;
2618     echo format_text($course->summary, $course->summaryformat, $options);
2619     echo '</div>';
2620     echo '</div>';
2621 }
2622
2623 function print_remote_host($host, $width="100%") {
2624     global $OUTPUT;
2625
2626     $linkcss = '';
2627
2628     echo '<div class="coursebox clearfix">';
2629     echo '<div class="info">';
2630     echo '<div class="name">';
2631     echo '<img src="'.$OUTPUT->pix_url('i/mnethost') . '" class="icon" alt="'.get_string('course').'" />';
2632     echo '<a title="'.s($host['name']).'" href="'.s($host['url']).'">'
2633         . s($host['name']).'</a> - ';
2634     echo $host['count'] . ' ' . get_string('courses');
2635     echo '</div>';
2636     echo '</div>';
2637     echo '</div>';
2638 }
2639
2640
2641 /// MODULE FUNCTIONS /////////////////////////////////////////////////////////////////
2642
2643 function add_course_module($mod) {
2644     global $DB;
2645
2646     $mod->added = time();
2647     unset($mod->id);
2648
2649     return $DB->insert_record("course_modules", $mod);
2650 }
2651
2652 /**
2653  * Returns course section - creates new if does not exist yet.
2654  * @param int $relative section number
2655  * @param int $courseid
2656  * @return object $course_section object
2657  */
2658 function get_course_section($section, $courseid) {
2659     global $DB;
2660
2661     if ($cw = $DB->get_record("course_sections", array("section"=>$section, "course"=>$courseid))) {
2662         return $cw;
2663     }
2664     $cw = new stdClass();
2665     $cw->course   = $courseid;
2666     $cw->section  = $section;
2667     $cw->summary  = "";
2668     $cw->summaryformat = FORMAT_HTML;
2669     $cw->sequence = "";
2670     $id = $DB->insert_record("course_sections", $cw);
2671     return $DB->get_record("course_sections", array("id"=>$id));
2672 }
2673 /**
2674  * Given a full mod object with section and course already defined, adds this module to that section.
2675  *
2676  * @param object $mod
2677  * @param int $beforemod An existing ID which we will insert the new module before
2678  * @return int The course_sections ID where the mod is inserted
2679  */
2680 function add_mod_to_section($mod, $beforemod=NULL) {
2681     global $DB;
2682
2683     if ($section = $DB->get_record("course_sections", array("course"=>$mod->course, "section"=>$mod->section))) {
2684
2685         $section->sequence = trim($section->sequence);
2686
2687         if (empty($section->sequence)) {
2688             $newsequence = "$mod->coursemodule";
2689
2690         } else if ($beforemod) {
2691             $modarray = explode(",", $section->sequence);
2692
2693             if ($key = array_keys($modarray, $beforemod->id)) {
2694                 $insertarray = array($mod->id, $beforemod->id);
2695                 array_splice($modarray, $key[0], 1, $insertarray);
2696                 $newsequence = implode(",", $modarray);
2697
2698             } else {  // Just tack it on the end anyway
2699                 $newsequence = "$section->sequence,$mod->coursemodule";
2700             }
2701
2702         } else {
2703             $newsequence = "$section->sequence,$mod->coursemodule";
2704         }
2705
2706         $DB->set_field("course_sections", "sequence", $newsequence, array("id"=>$section->id));
2707         return $section->id;     // Return course_sections ID that was used.
2708
2709     } else {  // Insert a new record
2710         $section->course   = $mod->course;
2711         $section->section  = $mod->section;
2712         $section->summary  = "";
2713         $section->summaryformat = FORMAT_HTML;
2714         $section->sequence = $mod->coursemodule;
2715         return $DB->insert_record("course_sections", $section);
2716     }
2717 }
2718
2719 function set_coursemodule_groupmode($id, $groupmode) {
2720     global $DB;
2721     return $DB->set_field("course_modules", "groupmode", $groupmode, array("id"=>$id));
2722 }
2723
2724 function set_coursemodule_idnumber($id, $idnumber) {
2725     global $DB;
2726     return $DB->set_field("course_modules", "idnumber", $idnumber, array("id"=>$id));
2727 }
2728
2729 /**
2730 * $prevstateoverrides = true will set the visibility of the course module
2731 * to what is defined in visibleold. This enables us to remember the current
2732 * visibility when making a whole section hidden, so that when we toggle
2733 * that section back to visible, we are able to return the visibility of
2734 * the course module back to what it was originally.
2735 */
2736 function set_coursemodule_visible($id, $visible, $prevstateoverrides=false) {
2737     global $DB, $CFG;
2738     require_once($CFG->libdir.'/gradelib.php');
2739
2740     if (!$cm = $DB->get_record('course_modules', array('id'=>$id))) {
2741         return false;
2742     }
2743     if (!$modulename = $DB->get_field('modules', 'name', array('id'=>$cm->module))) {
2744         return false;
2745     }
2746     if ($events = $DB->get_records('event', array('instance'=>$cm->instance, 'modulename'=>$modulename))) {
2747         foreach($events as $event) {
2748             if ($visible) {
2749                 show_event($event);
2750             } else {
2751                 hide_event($event);
2752             }
2753         }
2754     }
2755
2756     // hide the associated grade items so the teacher doesn't also have to go to the gradebook and hide them there
2757     $grade_items = grade_item::fetch_all(array('itemtype'=>'mod', 'itemmodule'=>$modulename, 'iteminstance'=>$cm->instance, 'courseid'=>$cm->course));
2758     if ($grade_items) {
2759         foreach ($grade_items as $grade_item) {
2760             $grade_item->set_hidden(!$visible);
2761         }
2762     }
2763
2764     if ($prevstateoverrides) {
2765         if ($visible == '0') {
2766             // Remember the current visible state so we can toggle this back.
2767             $DB->set_field('course_modules', 'visibleold', $cm->visible, array('id'=>$id));
2768         } else {
2769             // Get the previous saved visible states.
2770             return $DB->set_field('course_modules', 'visible', $cm->visibleold, array('id'=>$id));
2771         }
2772     }
2773     return $DB->set_field("course_modules", "visible", $visible, array("id"=>$id));
2774 }
2775
2776 /**
2777  * Delete a course module and any associated data at the course level (events)
2778  * Until 1.5 this function simply marked a deleted flag ... now it
2779  * deletes it completely.
2780  *
2781  */
2782 function delete_course_module($id) {
2783     global $CFG, $DB;
2784     require_once($CFG->libdir.'/gradelib.php');
2785     require_once($CFG->dirroot.'/blog/lib.php');
2786
2787     if (!$cm = $DB->get_record('course_modules', array('id'=>$id))) {
2788         return true;
2789     }
2790     $modulename = $DB->get_field('modules', 'name', array('id'=>$cm->module));
2791     //delete events from calendar
2792     if ($events = $DB->get_records('event', array('instance'=>$cm->instance, 'modulename'=>$modulename))) {
2793         foreach($events as $event) {
2794             delete_event($event->id);
2795         }
2796     }
2797     //delete grade items, outcome items and grades attached to modules
2798     if ($grade_items = grade_item::fetch_all(array('itemtype'=>'mod', 'itemmodule'=>$modulename,
2799                                                    'iteminstance'=>$cm->instance, 'courseid'=>$cm->course))) {
2800         foreach ($grade_items as $grade_item) {
2801             $grade_item->delete('moddelete');
2802         }
2803     }
2804     // Delete completion and availability data; it is better to do this even if the
2805     // features are not turned on, in case they were turned on previously (these will be
2806     // very quick on an empty table)
2807     $DB->delete_records('course_modules_completion', array('coursemoduleid' => $cm->id));
2808     $DB->delete_records('course_modules_availability', array('coursemoduleid'=> $cm->id));
2809
2810     delete_context(CONTEXT_MODULE, $cm->id);
2811     return $DB->delete_records('course_modules', array('id'=>$cm->id));
2812 }
2813
2814 function delete_mod_from_section($mod, $section) {
2815     global $DB;
2816
2817     if ($section = $DB->get_record("course_sections", array("id"=>$section)) ) {
2818
2819         $modarray = explode(",", $section->sequence);
2820
2821         if ($key = array_keys ($modarray, $mod)) {
2822             array_splice($modarray, $key[0], 1);
2823             $newsequence = implode(",", $modarray);
2824             return $DB->set_field("course_sections", "sequence", $newsequence, array("id"=>$section->id));
2825         } else {
2826             return false;
2827         }
2828
2829     }
2830     return false;
2831 }
2832
2833 /**
2834  * Moves a section up or down by 1. CANNOT BE USED DIRECTLY BY AJAX!
2835  *
2836  * @param object $course
2837  * @param int $section
2838  * @param int $move (-1 or 1)
2839  */
2840 function move_section($course, $section, $move) {
2841 /// Moves a whole course section up and down within the course
2842     global $USER, $DB;
2843
2844     if (!$move) {
2845         return true;
2846     }
2847
2848     $sectiondest = $section + $move;
2849
2850     if ($sectiondest > $course->numsections or $sectiondest < 1) {
2851         return false;
2852     }
2853
2854     if (!$sectionrecord = $DB->get_record("course_sections", array("course"=>$course->id, "section"=>$section))) {
2855         return false;
2856     }
2857
2858     if (!$sectiondestrecord = $DB->get_record("course_sections", array("course"=>$course->id, "section"=>$sectiondest))) {
2859         return false;
2860     }
2861
2862     $DB->set_field("course_sections", "section", $sectiondest, array("id"=>$sectionrecord->id));
2863     $DB->set_field("course_sections", "section", $section, array("id"=>$sectiondestrecord->id));
2864
2865     // if the focus is on the section that is being moved, then move the focus along
2866     if (course_get_display($course->id) == $section) {
2867         course_set_display($course->id, $sectiondest);
2868     }
2869
2870     // Check for duplicates and fix order if needed.
2871     // There is a very rare case that some sections in the same course have the same section id.
2872     $sections = $DB->get_records('course_sections', array('course'=>$course->id), 'section ASC');
2873     $n = 0;
2874     foreach ($sections as $section) {
2875         if ($section->section != $n) {
2876             $DB->set_field('course_sections', 'section', $n, array('id'=>$section->id));
2877         }
2878         $n++;
2879     }
2880     return true;
2881 }
2882
2883 /**
2884  * Moves a section within a course, from a position to another.
2885  * Be very careful: $section and $destination refer to section number,
2886  * not id!.
2887  *
2888  * @param object $course
2889  * @param int $section Section number (not id!!!)
2890  * @param int $destination
2891  * @return boolean Result
2892  */
2893 function move_section_to($course, $section, $destination) {
2894 /// Moves a whole course section up and down within the course
2895     global $USER, $DB;
2896
2897     if (!$destination && $destination != 0) {
2898         return true;
2899     }
2900
2901     if ($destination > $course->numsections) {
2902         return false;
2903     }
2904
2905     // Get all sections for this course and re-order them (2 of them should now share the same section number)
2906     if (!$sections = $DB->get_records_menu('course_sections', array('course' => $course->id),
2907             'section ASC, id ASC', 'id, section')) {
2908         return false;
2909     }
2910
2911     $sections = reorder_sections($sections, $section, $destination);
2912
2913     // Update all sections
2914     foreach ($sections as $id => $position) {
2915         $DB->set_field('course_sections', 'section', $position, array('id' => $id));
2916     }
2917
2918     // if the focus is on the section that is being moved, then move the focus along
2919     if (course_get_display($course->id) == $section) {
2920         course_set_display($course->id, $destination);
2921     }
2922     return true;
2923 }
2924
2925 /**
2926  * Reordering algorithm for course sections. Given an array of section->section indexed by section->id,
2927  * an original position number and a target position number, rebuilds the array so that the
2928  * move is made without any duplication of section positions.
2929  * Note: The target_position is the position AFTER WHICH the moved section will be inserted. If you want to
2930  * insert a section before the first one, you must give 0 as the target (section 0 can never be moved).
2931  *
2932  * @param array $sections
2933  * @param int $origin_position
2934  * @param int $target_position
2935  * @return array
2936  */
2937 function reorder_sections($sections, $origin_position, $target_position) {
2938     if (!is_array($sections)) {
2939         return false;
2940     }
2941
2942     // We can't move section position 0
2943     if ($origin_position < 1) {
2944         echo "We can't move section position 0";
2945         return false;
2946     }
2947
2948     // Locate origin section in sections array
2949     if (!$origin_key = array_search($origin_position, $sections)) {
2950         echo "searched position not in sections array";
2951         return false; // searched position not in sections array
2952     }
2953
2954     // Extract origin section
2955     $origin_section = $sections[$origin_key];
2956     unset($sections[$origin_key]);
2957
2958     // Find offset of target position (stupid PHP's array_splice requires offset instead of key index!)
2959     $found = false;
2960     $append_array = array();
2961     foreach ($sections as $id => $position) {
2962         if ($found) {
2963             $append_array[$id] = $position;
2964             unset($sections[$id]);
2965         }
2966         if ($position == $target_position) {
2967             $found = true;
2968         }
2969     }
2970
2971     // Append moved section
2972     $sections[$origin_key] = $origin_section;
2973
2974     // Append rest of array (if applicable)
2975     if (!empty($append_array)) {
2976         foreach ($append_array as $id => $position) {
2977             $sections[$id] = $position;
2978         }
2979     }
2980
2981     // Renumber positions
2982     $position = 0;
2983     foreach ($sections as $id => $p) {
2984         $sections[$id] = $position;
2985         $position++;
2986     }
2987
2988     return $sections;
2989
2990 }
2991
2992 /**
2993  * Move the module object $mod to the specified $section
2994  * If $beforemod exists then that is the module
2995  * before which $modid should be inserted
2996  * All parameters are objects
2997  */
2998 function moveto_module($mod, $section, $beforemod=NULL) {
2999     global $DB, $OUTPUT;
3000
3001 /// Remove original module from original section
3002     if (! delete_mod_from_section($mod->id, $mod->section)) {
3003         echo $OUTPUT->notification("Could not delete module from existing section");
3004     }
3005
3006 /// Update module itself if necessary
3007
3008     if ($mod->section != $section->id) {
3009         $mod->section = $section->id;
3010         $DB->update_record("course_modules", $mod);
3011         // if moving to a hidden section then hide module
3012         if (!$section->visible) {
3013             set_coursemodule_visible($mod->id, 0);
3014         }
3015     }
3016
3017 /// Add the module into the new section
3018
3019     $mod->course       = $section->course;
3020     $mod->section      = $section->section;  // need relative reference
3021     $mod->coursemodule = $mod->id;
3022
3023     if (! add_mod_to_section($mod, $beforemod)) {
3024         return false;
3025     }
3026
3027     return true;
3028 }
3029
3030 function make_editing_buttons($mod, $absolute=false, $moveselect=true, $indent=-1, $section=-1) {
3031     global $CFG, $USER, $DB, $OUTPUT;
3032
3033     static $str;
3034     static $sesskey;
3035
3036     $modcontext = get_context_instance(CONTEXT_MODULE, $mod->id);
3037     // no permission to edit
3038     if (!has_capability('moodle/course:manageactivities', $modcontext)) {
3039         return false;
3040     }
3041
3042     if (!isset($str)) {
3043         $str->assign         = get_string("assignroles", 'role');
3044         $str->delete         = get_string("delete");
3045         $str->move           = get_string("move");
3046         $str->moveup         = get_string("moveup");
3047         $str->movedown       = get_string("movedown");
3048         $str->moveright      = get_string("moveright");
3049         $str->moveleft       = get_string("moveleft");
3050         $str->update         = get_string("update");
3051         $str->duplicate      = get_string("duplicate");
3052         $str->hide           = get_string("hide");
3053         $str->show           = get_string("show");
3054         $str->clicktochange  = get_string("clicktochange");
3055         $str->forcedmode     = get_string("forcedmode");
3056         $str->groupsnone     = get_string("groupsnone");
3057         $str->groupsseparate = get_string("groupsseparate");
3058         $str->groupsvisible  = get_string("groupsvisible");
3059         $sesskey = sesskey();
3060     }
3061
3062     if ($section >= 0) {
3063         $section = '&amp;sr='.$section;   // Section return
3064     } else {
3065         $section = '';
3066     }
3067
3068     if ($absolute) {
3069         $path = $CFG->wwwroot.'/course';
3070     } else {
3071         $path = '.';
3072     }
3073     if (has_capability('moodle/course:activityvisibility', $modcontext)) {
3074         if ($mod->visible) {
3075             $hideshow = '<a class="editing_hide" title="'.$str->hide.'" href="'.$path.'/mod.php?hide='.$mod->id.
3076                         '&amp;sesskey='.$sesskey.$section.'"><img'.
3077                         ' src="'.$OUTPUT->pix_url('t/hide') . '" class="iconsmall" '.
3078                         ' alt="'.$str->hide.'" /></a>'."\n";
3079         } else {
3080             $hideshow = '<a class="editing_show" title="'.$str->show.'" href="'.$path.'/mod.php?show='.$mod->id.
3081                         '&amp;sesskey='.$sesskey.$section.'"><img'.
3082                         ' src="'.$OUTPUT->pix_url('t/show') . '" class="iconsmall" '.
3083                         ' alt="'.$str->show.'" /></a>'."\n";
3084         }
3085     } else {
3086         $hideshow = '';
3087     }
3088
3089     if ($mod->groupmode !== false) {
3090         if ($mod->groupmode == SEPARATEGROUPS) {
3091             $grouptitle = $str->groupsseparate;
3092             $groupclass = 'editing_groupsseparate';
3093             $groupimage = $OUTPUT->pix_url('t/groups') . '';
3094             $grouplink  = $path.'/mod.php?id='.$mod->id.'&amp;groupmode=0&amp;sesskey='.$sesskey;
3095         } else if ($mod->groupmode == VISIBLEGROUPS) {
3096             $grouptitle = $str->groupsvisible;
3097             $groupclass = 'editing_groupsvisible';
3098             $groupimage = $OUTPUT->pix_url('t/groupv') . '';
3099             $grouplink  = $path.'/mod.php?id='.$mod->id.'&amp;groupmode=1&amp;sesskey='.$sesskey;
3100         } else {
3101             $grouptitle = $str->groupsnone;
3102             $groupclass = 'editing_groupsnone';
3103             $groupimage = $OUTPUT->pix_url('t/groupn') . '';
3104             $grouplink  = $path.'/mod.php?id='.$mod->id.'&amp;groupmode=2&amp;sesskey='.$sesskey;
3105         }
3106         if ($mod->groupmodelink) {
3107             $groupmode = '<a class="'.$groupclass.'" title="'.$grouptitle.' ('.$str->clicktochange.')" href="'.$grouplink.'">'.
3108                          '<img src="'.$groupimage.'" class="iconsmall" '.
3109                          'alt="'.$grouptitle.'" /></a>';
3110         } else {
3111             $groupmode = '<img title="'.$grouptitle.' ('.$str->forcedmode.')" '.
3112                          ' src="'.$groupimage.'" class="iconsmall" '.
3113                          'alt="'.$grouptitle.'" />';
3114         }
3115     } else {
3116         $groupmode = "";
3117     }
3118
3119     if (has_capability('moodle/course:update', get_context_instance(CONTEXT_COURSE, $mod->course))) {
3120         if ($moveselect) {
3121             $move =     '<a class="editing_move" title="'.$str->move.'" href="'.$path.'/mod.php?copy='.$mod->id.
3122                         '&amp;sesskey='.$sesskey.$section.'"><img'.
3123                         ' src="'.$OUTPUT->pix_url('t/move') . '" class="iconsmall" '.
3124                         ' alt="'.$str->move.'" /></a>'."\n";
3125         } else {
3126             $move =     '<a class="editing_moveup" title="'.$str->moveup.'" href="'.$path.'/mod.php?id='.$mod->id.
3127                         '&amp;move=-1&amp;sesskey='.$sesskey.$section.'"><img'.
3128                         ' src="'.$OUTPUT->pix_url('t/up') . '" class="iconsmall" '.
3129                         ' alt="'.$str->moveup.'" /></a>'."\n".
3130                         '<a class="editing_movedown" title="'.$str->movedown.'" href="'.$path.'/mod.php?id='.$mod->id.
3131                         '&amp;move=1&amp;sesskey='.$sesskey.$section.'"><img'.
3132                         ' src="'.$OUTPUT->pix_url('t/down') . '" class="iconsmall" '.
3133                         ' alt="'.$str->movedown.'" /></a>'."\n";
3134         }
3135     } else {
3136         $move = '';
3137     }
3138
3139     $leftright = '';
3140     if (has_capability('moodle/course:update', get_context_instance(CONTEXT_COURSE, $mod->course))) {
3141
3142         if (right_to_left()) {   // Exchange arrows on RTL
3143             $rightarrow = 't/left';
3144             $leftarrow  = 't/right';
3145         } else {
3146             $rightarrow = 't/right';
3147             $leftarrow  = 't/left';
3148         }
3149
3150         if ($indent > 0) {
3151             $leftright .= '<a class="editing_moveleft" title="'.$str->moveleft.'" href="'.$path.'/mod.php?id='.$mod->id.
3152                         '&amp;indent=-1&amp;sesskey='.$sesskey.$section.'"><img'.
3153                         ' src="'.$OUTPUT->pix_url($leftarrow).'" class="iconsmall" '.
3154                         ' alt="'.$str->moveleft.'" /></a>'."\n";
3155         }
3156         if ($indent >= 0) {
3157             $leftright .= '<a class="editing_moveright" title="'.$str->moveright.'" href="'.$path.'/mod.php?id='.$mod->id.
3158                         '&amp;indent=1&amp;sesskey='.$sesskey.$section.'"><img'.
3159                         ' src="'.$OUTPUT->pix_url($rightarrow).'" class="iconsmall" '.
3160                         ' alt="'.$str->moveright.'" /></a>'."\n";
3161         }
3162     }
3163     if (has_capability('moodle/course:managegroups', $modcontext)){
3164         $context = get_context_instance(CONTEXT_MODULE, $mod->id);
3165         $assign = '<a class="editing_assign" title="'.$str->assign.'" href="'.$CFG->wwwroot.'/'.$CFG->admin.'/roles/assign.php?contextid='.
3166             $context->id.'"><img src="'.$OUTPUT->pix_url('i/roles') . '" alt="'.$str->assign.'" class="iconsmall"/></a>';
3167     } else {
3168         $assign = '';
3169     }
3170
3171     return '<span class="commands">'."\n".$leftright.$move.
3172            '<a class="editing_update" title="'.$str->update.'" href="'.$path.'/mod.php?update='.$mod->id.
3173            '&amp;sesskey='.$sesskey.$section.'"><img'.
3174            ' src="'.$OUTPUT->pix_url('t/edit') . '" class="iconsmall" '.
3175            ' alt="'.$str->update.'" /></a>'."\n".
3176            '<a class="editing_duplicate" title="'.$str->duplicate.'" href="'.$path.'/mod.php?duplicate='.$mod->id.
3177            '&amp;sesskey='.$sesskey.$section.'"><img'.
3178            ' src="'.$OUTPUT->pix_url('t/copy') . '" class="iconsmall" '.
3179            ' alt="'.$str->duplicate.'" /></a>'."\n".
3180            '<a class="editing_delete" title="'.$str->delete.'" href="'.$path.'/mod.php?delete='.$mod->id.
3181            '&amp;sesskey='.$sesskey.$section.'"><img'.
3182            ' src="'.$OUTPUT->pix_url('t/delete') . '" class="iconsmall" '.
3183            ' alt="'.$str->delete.'" /></a>'."\n".$hideshow.$groupmode."\n".$assign.'</span>';
3184 }
3185
3186 /**
3187  * given a course object with shortname & fullname, this function will
3188  * truncate the the number of chars allowed and add ... if it was too long
3189  */
3190 function course_format_name ($course,$max=100) {
3191
3192     $str = $course->shortname.': '. $course->fullname;
3193     if (strlen($str) <= $max) {
3194         return $str;
3195     }
3196     else {
3197         return substr($str,0,$max-3).'...';
3198     }
3199 }
3200
3201 function update_restricted_mods($course, $mods) {
3202     global $DB;
3203
3204 /// Delete all the current restricted list
3205     $DB->delete_records('course_allowed_modules', array('course'=>$course->id));
3206
3207     if (empty($course->restrictmodules)) {
3208         return;   // We're done
3209     }
3210
3211 /// Insert the new list of restricted mods
3212     foreach ($mods as $mod) {
3213         if ($mod == 0) {
3214             continue; // this is the 'allow none' option
3215         }
3216         $am = new stdClass();
3217         $am->course = $course->id;
3218         $am->module = $mod;
3219         $DB->insert_record('course_allowed_modules',$am);
3220     }
3221 }
3222
3223 /**
3224  * This function will take an int (module id) or a string (module name)
3225  * and return true or false, whether it's allowed in the given course (object)
3226  * $mod is not allowed to be an object, as the field for the module id is inconsistent
3227  * depending on where in the code it's called from (sometimes $mod->id, sometimes $mod->module)
3228  */
3229
3230 function course_allowed_module($course,$mod) {
3231     global $DB;
3232
3233     if (empty($course->restrictmodules)) {
3234         return true;
3235     }
3236
3237     // Admins and admin-like people who can edit everything can also add anything.
3238     // Originally there was a course:update test only, but it did not match the test in course edit form
3239     if (has_capability('moodle/site:config', get_context_instance(CONTEXT_SYSTEM))) {
3240         return true;
3241     }
3242
3243     if (is_numeric($mod)) {
3244         $modid = $mod;
3245     } else if (is_string($mod)) {
3246         $modid = $DB->get_field('modules', 'id', array('name'=>$mod));
3247     }
3248     if (empty($modid)) {
3249         return false;
3250     }
3251
3252     return $DB->record_exists('course_allowed_modules', array('course'=>$course->id, 'module'=>$modid));
3253 }
3254
3255 /**
3256  * Recursively delete category including all subcategories and courses.
3257  * @param stdClass $category
3258  * @param boolean $showfeedback display some notices
3259  * @return array return deleted courses
3260  */
3261 function category_delete_full($category, $showfeedback=true) {
3262     global $CFG, $DB;
3263     require_once($CFG->libdir.'/gradelib.php');
3264     require_once($CFG->libdir.'/questionlib.php');
3265     require_once($CFG->dirroot.'/cohort/lib.php');
3266
3267     if ($children = $DB->get_records('course_categories', array('parent'=>$category->id), 'sortorder ASC')) {
3268         foreach ($children as $childcat) {
3269             category_delete_full($childcat, $showfeedback);
3270         }
3271     }
3272
3273     $deletedcourses = array();
3274     if ($courses = $DB->get_records('course', array('category'=>$category->id), 'sortorder ASC')) {
3275         foreach ($courses as $course) {
3276             if (!delete_course($course, false)) {
3277                 throw new moodle_exception('cannotdeletecategorycourse','','',$course->shortname);
3278             }
3279             $deletedcourses[] = $course;
3280         }
3281     }
3282
3283     // move or delete cohorts in this context
3284     cohort_delete_category($category);
3285
3286     // now delete anything that may depend on course category context
3287     grade_course_category_delete($category->id, 0, $showfeedback);
3288     if (!question_delete_course_category($category, 0, $showfeedback)) {
3289         throw new moodle_exception('cannotdeletecategoryquestions','','',$category->name);
3290     }
3291
3292     // finally delete the category and it's context
3293     $DB->delete_records('course_categories', array('id'=>$category->id));
3294     delete_context(CONTEXT_COURSECAT, $category->id);
3295
3296     events_trigger('course_category_deleted', $category);
3297
3298     return $deletedcourses;
3299 }
3300
3301 /**
3302  * Delete category, but move contents to another category.
3303  * @param object $ccategory
3304  * @param int $newparentid category id
3305  * @return bool status
3306  */
3307 function category_delete_move($category, $newparentid, $showfeedback=true) {
3308     global $CFG, $DB, $OUTPUT;
3309     require_once($CFG->libdir.'/gradelib.php');
3310     require_once($CFG->libdir.'/questionlib.php');
3311     require_once($CFG->dirroot.'/cohort/lib.php');
3312
3313     if (!$newparentcat = $DB->get_record('course_categories', array('id'=>$newparentid))) {
3314         return false;
3315     }
3316
3317     if ($children = $DB->get_records('course_categories', array('parent'=>$category->id), 'sortorder ASC')) {
3318         foreach ($children as $childcat) {
3319             move_category($childcat, $newparentcat);
3320         }
3321     }
3322
3323     if ($courses = $DB->get_records('course', array('category'=>$category->id), 'sortorder ASC', 'id')) {
3324         if (!move_courses(array_keys($courses), $newparentid)) {
3325             echo $OUTPUT->notification("Error moving courses");
3326             return false;
3327         }
3328         echo $OUTPUT->notification(get_string('coursesmovedout', '', format_string($category->name)), 'notifysuccess');
3329     }
3330
3331     // move or delete cohorts in this context
3332     cohort_delete_category($category);
3333
3334     // now delete anything that may depend on course category context
3335     grade_course_category_delete($category->id, $newparentid, $showfeedback);
3336     if (!question_delete_course_category($category, $newparentcat, $showfeedback)) {
3337         echo $OUTPUT->notification(get_string('errordeletingquestionsfromcategory', 'question', $category), 'notifysuccess');
3338         return false;
3339     }
3340
3341     // finally delete the category and it's context
3342     $DB->delete_records('course_categories', array('id'=>$category->id));
3343     delete_context(CONTEXT_COURSECAT, $category->id);
3344
3345     events_trigger('course_category_deleted', $category);
3346
3347     echo $OUTPUT->notification(get_string('coursecategorydeleted', '', format_string($category->name)), 'notifysuccess');
3348
3349     return true;
3350 }
3351
3352 /**
3353  * Efficiently moves many courses around while maintaining
3354  * sortorder in order.
3355  *
3356  * @param array $courseids is an array of course ids
3357  * @param int $categoryid
3358  * @return bool success
3359  */
3360 function move_courses($courseids, $categoryid) {
3361     global $CFG, $DB, $OUTPUT;
3362
3363     if (empty($courseids)) {
3364         // nothing to do
3365         return;
3366     }
3367
3368     if (!$category = $DB->get_record('course_categories', array('id'=>$categoryid))) {
3369         return false;
3370     }
3371
3372     $courseids = array_reverse($courseids);
3373     $i = 1;
3374
3375     foreach ($courseids as $courseid) {
3376         if ($course = $DB->get_record('course', array('id'=>$courseid), 'id, category')) {
3377             $course->category  = $category->id;
3378             $course->sortorder = $category->sortorder + MAX_COURSES_IN_CATEGORY - $i++;
3379             if ($category->visible == 0) {
3380                 // hide the course when moving into hidden category,
3381                 // do not update the visibleold flag - we want to get to previous state if somebody unhides the category
3382                 $course->visible = 0;
3383             }
3384
3385             $DB->update_record('course', $course);
3386
3387             $context   = get_context_instance(CONTEXT_COURSE, $course->id);
3388             $newparent = get_context_instance(CONTEXT_COURSECAT, $course->category);
3389             context_moved($context, $newparent);
3390         }
3391     }
3392     fix_course_sortorder();
3393
3394     return true;
3395 }
3396
3397 /**
3398  * Hide course category and child course and subcategories
3399  * @param stdClass $category
3400  * @return void
3401  */
3402 function course_category_hide($category) {
3403     global $DB;
3404
3405     $category->visible = 0;
3406     $DB->set_field('course_categories', 'visible', 0, array('id'=>$category->id));
3407     $DB->set_field('course_categories', 'visibleold', 0, array('id'=>$category->id));
3408     $DB->execute("UPDATE {course} SET visibleold = visible WHERE category = ?", array($category->id)); // store visible flag so that we can return to it if we immediately unhide
3409     $DB->set_field('course', 'visible', 0, array('category' => $category->id));
3410     // get all child categories and hide too
3411     if ($subcats = $DB->get_records_select('course_categories', "path LIKE ?", array("$category->path/%"))) {
3412         foreach ($subcats as $cat) {
3413             $DB->set_field('course_categories', 'visibleold', $cat->visible, array('id'=>$cat->id));
3414             $DB->set_field('course_categories', 'visible', 0, array('id'=>$cat->id));
3415             $DB->execute("UPDATE {course} SET visibleold = visible WHERE category = ?", array($cat->id));
3416             $DB->set_field('course', 'visible', 0, array('category' => $cat->id));
3417         }
3418     }
3419 }
3420
3421 /**
3422  * Show course category and child course and subcategories
3423  * @param stdClass $category
3424  * @return void
3425  */
3426 function course_category_show($category) {
3427     global $DB;
3428
3429     $category->visible = 1;
3430     $DB->set_field('course_categories', 'visible', 1, array('id'=>$category->id));
3431     $DB->set_field('course_categories', 'visibleold', 1, array('id'=>$category->id));
3432     $DB->execute("UPDATE {course} SET visible = visibleold WHERE category = ?", array($category->id));
3433     // get all child categories and unhide too
3434     if ($subcats = $DB->get_records_select('course_categories', "path LIKE ?", array("$category->path/%"))) {
3435         foreach ($subcats as $cat) {
3436             if ($cat->visibleold) {
3437                 $DB->set_field('course_categories', 'visible', 1, array('id'=>$cat->id));
3438             }
3439             $DB->execute("UPDATE {course} SET visible = visibleold WHERE category = ?", array($cat->id));
3440         }
3441     }
3442 }
3443
3444 /**
3445  * Efficiently moves a category - NOTE that this can have
3446  * a huge impact access-control-wise...
3447  */
3448 function move_category($category, $newparentcat) {
3449     global $CFG, $DB;
3450
3451     $context = get_context_instance(CONTEXT_COURSECAT, $category->id);
3452
3453     $hidecat = false;
3454     if (empty($newparentcat->id)) {
3455         $DB->set_field('course_categories', 'parent', 0, array('id'=>$category->id));
3456
3457         $newparent = get_context_instance(CONTEXT_SYSTEM);
3458
3459     } else {
3460         $DB->set_field('course_categories', 'parent', $newparentcat->id, array('id'=>$category->id));
3461         $newparent = get_context_instance(CONTEXT_COURSECAT, $newparentcat->id);
3462
3463         if (!$newparentcat->visible and $category->visible) {
3464             // better hide category when moving into hidden category, teachers may unhide afterwards and the hidden children will be restored properly
3465             $hidecat = true;
3466         }
3467     }
3468
3469     context_moved($context, $newparent);
3470
3471     // now make it last in new category
3472     $DB->set_field('course_categories', 'sortorder', MAX_COURSES_IN_CATEGORY*MAX_COURSE_CATEGORIES, array('id'=>$category->id));
3473
3474     // and fix the sortorders
3475     fix_course_sortorder();
3476
3477     if ($hidecat) {
3478         course_category_hide($category);
3479     }
3480 }
3481
3482 /**
3483  * Returns the display name of the given section that the course prefers.
3484  *
3485  * This function utilizes a callback that can be implemented within the course
3486  * formats lib.php file to customize the display name that is used to reference
3487  * the section.
3488  *
3489  * By default (if callback is not defined) the method
3490  * {@see get_numeric_section_name} is called instead.
3491  *
3492  * @param stdClass $course The course to get the section name for
3493  * @param stdClass $section Section object from database
3494  * @return Display name that the course format prefers, e.g. "Week 2"
3495  *
3496  * @see get_generic_section_name
3497  */
3498 function get_section_name(stdClass $course, stdClass $section) {
3499     global $CFG;
3500
3501     /// Inelegant hack for bug 3408
3502     if ($course->format == 'site') {
3503         return get_string('site');
3504     }
3505
3506     // Use course formatter callback if it exists
3507     $namingfile = $CFG->dirroot.'/course/format/'.$course->format.'/lib.php';
3508     $namingfunction = 'callback_'.$course->format.'_get_section_name';
3509     if (!function_exists($namingfunction) && file_exists($namingfile)) {
3510         require_once $namingfile;
3511     }
3512     if (function_exists($namingfunction)) {
3513         return $namingfunction($course, $section);
3514     }
3515
3516     // else, default behavior:
3517     return get_generic_section_name($course->format, $section);
3518 }
3519
3520 /**
3521  * Gets the generic section name for a courses section.
3522  *
3523  * @param string $format Course format ID e.g. 'weeks' $course->format
3524  * @param stdClass $section Section object from database
3525  * @return Display name that the course format prefers, e.g. "Week 2"
3526  */
3527 function get_generic_section_name($format, stdClass $section) {
3528     return get_string('sectionname', "format_$format") . ' ' . $section->section;
3529 }
3530
3531
3532 function course_format_uses_sections($format) {
3533     global $CFG;
3534
3535     $featurefile = $CFG->dirroot.'/course/format/'.$format.'/lib.php';
3536     $featurefunction = 'callback_'.$format.'_uses_sections';
3537     if (!function_exists($featurefunction) && file_exists($featurefile)) {
3538         require_once $featurefile;
3539     }
3540     if (function_exists($featurefunction)) {
3541         return $featurefunction();
3542     }
3543
3544     return false;
3545 }
3546
3547 /**
3548  * Returns the information about the ajax support in the given source format
3549  *
3550  * The returned object's property (boolean)capable indicates that
3551  * the course format supports Moodle course ajax features.
3552  * The property (array)testedbrowsers can be used as a parameter for {@see ajaxenabled()}.
3553  *
3554  * @param string $format
3555  * @return stdClass
3556  */
3557 function course_format_ajax_support($format) {
3558     global $CFG;
3559
3560     // set up default values
3561     $ajaxsupport = new stdClass();
3562     $ajaxsupport->capable = false;
3563     $ajaxsupport->testedbrowsers = array();
3564
3565     // get the information from the course format library
3566     $featurefile = $CFG->dirroot.'/course/format/'.$format.'/lib.php';
3567     $featurefunction = 'callback_'.$format.'_ajax_support';
3568     if (!function_exists($featurefunction) && file_exists($featurefile)) {
3569         require_once $featurefile;
3570     }
3571     if (function_exists($featurefunction)) {
3572         $formatsupport = $featurefunction();
3573         if (isset($formatsupport->capable)) {
3574             $ajaxsupport->capable = $formatsupport->capable;
3575         }
3576         if (is_array($formatsupport->testedbrowsers)) {
3577             $ajaxsupport->testedbrowsers = $formatsupport->testedbrowsers;
3578         }
3579     }
3580
3581     return $ajaxsupport;
3582 }
3583
3584 /**
3585  * Can the current user delete this course?
3586  * Course creators have exception,
3587  * 1 day after the creation they can sill delete the course.
3588  * @param int $courseid
3589  * @return boolean
3590  */
3591 function can_delete_course($courseid) {
3592     global $USER, $DB;
3593
3594     $context = get_context_instance(CONTEXT_COURSE, $courseid);
3595
3596     if (has_capability('moodle/course:delete', $context)) {
3597         return true;
3598     }
3599
3600     // hack: now try to find out if creator created this course recently (1 day)
3601     if (!has_capability('moodle/course:create', $context)) {
3602         return false;
3603     }
3604
3605     $since = time() - 60*60*24;
3606
3607     $params = array('userid'=>$USER->id, 'url'=>"view.php?id=$courseid", 'since'=>$since);
3608     $select = "module = 'course' AND action = 'new' AND userid = :userid AND url = :url AND time > :since";
3609
3610     return $DB->record_exists_select('log', $select, $params);
3611 }
3612
3613 /**
3614  * Save the Your name for 'Some role' strings.
3615  *
3616  * @param integer $courseid the id of this course.
3617  * @param array $data the data that came from the course settings form.
3618  */
3619 function save_local_role_names($courseid, $data) {
3620     global $DB;
3621     $context = get_context_instance(CONTEXT_COURSE, $courseid);
3622
3623     foreach ($data as $fieldname => $value) {
3624         if (strpos($fieldname, 'role_') !== 0) {
3625             continue;
3626         }
3627         list($ignored, $roleid) = explode('_', $fieldname);
3628
3629         // make up our mind whether we want to delete, update or insert
3630         if (!$value) {
3631             $DB->delete_records('role_names', array('contextid' => $context->id, 'roleid' => $roleid));
3632
3633         } else if ($rolename = $DB->get_record('role_names', array('contextid' => $context->id, 'roleid' => $roleid))) {
3634             $rolename->name = $value;
3635             $DB->update_record('role_names', $rolename);
3636
3637         } else {
3638             $rolename = new stdClass;
3639             $rolename->contextid = $context->id;
3640             $rolename->roleid = $roleid;
3641             $rolename->name = $value;
3642             $DB->insert_record('role_names', $rolename);
3643         }
3644     }
3645 }
3646
3647 /**
3648  * Create a course and either return a $course object
3649  *
3650  * Please note this functions does not verify any access control,
3651  * the calling code is responsible for all validation (usually it is the form definition).
3652  *
3653  * @param array $editoroptions course description editor options
3654  * @param object $data  - all the data needed for an entry in the 'course' table
3655  * @return object new course instance
3656  */
3657 function create_course($data, $editoroptions = NULL) {
3658     global $CFG, $DB;
3659
3660     //check the categoryid - must be given for all new courses
3661     $category = $DB->get_record('course_categories', array('id'=>$data->category), '*', MUST_EXIST);
3662
3663     //check if the shortname already exist
3664     if (!empty($data->shortname)) {
3665         if ($DB->record_exists('course', array('shortname' => $data->shortname))) {
3666             throw new moodle_exception('shortnametaken');
3667         }
3668     }
3669
3670     //check if the id number already exist
3671     if (!empty($data->idnumber)) {
3672         if ($DB->record_exists('course', array('idnumber' => $data->idnumber))) {
3673             throw new moodle_exception('idnumbertaken');
3674         }
3675     }
3676
3677     $data->timecreated  = time();
3678     $data->timemodified = $data->timecreated;
3679
3680     // place at beginning of any category
3681     $data->sortorder = 0;
3682
3683     if ($editoroptions) {
3684         // summary text is updated later, we need context to store the files first
3685         $data->summary = '';
3686         $data->summary_format = FORMAT_HTML;
3687     }
3688
3689     if (!isset($data->visible)) {
3690         // data not from form, add missing visibility info
3691         $data->visible = $category->visible;
3692     }
3693     $data->visibleold = $data->visible;
3694
3695     $newcourseid = $DB->insert_record('course', $data);
3696     $context = get_context_instance(CONTEXT_COURSE, $newcourseid, MUST_EXIST);
3697
3698     if ($editoroptions) {
3699         // Save the files used in the summary editor and store
3700         $data = file_postupdate_standard_editor($data, 'summary', $editoroptions, $context, 'course', 'summary', 0);
3701         $DB->set_field('course', 'summary', $data->summary, array('id'=>$newcourseid));
3702         $DB->set_field('course', 'summaryformat', $data->summary_format, array('id'=>$newcourseid));
3703     }
3704
3705     $course = $DB->get_record('course', array('id'=>$newcourseid));
3706
3707     // Setup the blocks
3708     blocks_add_default_course_blocks($course);
3709
3710     $section = new stdClass();
3711     $section->course        = $course->id;   // Create a default section.
3712     $section->section       = 0;
3713     $section->summaryformat = FORMAT_HTML;
3714     $DB->insert_record('course_sections', $section);
3715
3716     fix_course_sortorder();
3717
3718     // update module restrictions
3719     if ($course->restrictmodules) {
3720         if (isset($data->allowedmods)) {
3721             update_restricted_mods($course, $data->allowedmods);
3722         } else {
3723             if (!empty($CFG->defaultallowedmodules)) {
3724                 update_restricted_mods($course, explode(',', $CFG->defaultallowedmodules));
3725             }
3726         }
3727     }
3728
3729     // new context created - better mark it as dirty
3730     mark_context_dirty($context->path);
3731
3732     // Save any custom role names.
3733     save_local_role_names($course->id, (array)$data);
3734
3735     // set up enrolments
3736     enrol_course_updated(true, $course, $data);
3737
3738     add_to_log(SITEID, 'course', 'new', 'view.php?id='.$course->id, $data->fullname.' (ID '.$course->id.')');
3739
3740     // Trigger events
3741     events_trigger('course_created', $course);
3742
3743     return $course;
3744 }
3745
3746 /**
3747  * Update a course.
3748  *
3749  * Please note this functions does not verify any access control,
3750  * the calling code is responsible for all validation (usually it is the form definition).
3751  *
3752  * @param object $data  - all the data needed for an entry in the 'course' table
3753  * @param array $editoroptions course description editor options
3754  * @return void
3755  */
3756 function update_course($data, $editoroptions = NULL) {
3757     global $CFG, $DB;
3758
3759     $data->timemodified = time();
3760
3761     $oldcourse = $DB->get_record('course', array('id'=>$data->id), '*', MUST_EXIST);
3762     $context   = get_context_instance(CONTEXT_COURSE, $oldcourse->id);
3763
3764     if ($editoroptions) {
3765         $data = file_postupdate_standard_editor($data, 'summary', $editoroptions, $context, 'course', 'summary', 0);
3766     }
3767
3768     if (!isset($data->category) or empty($data->category)) {
3769         // prevent nulls and 0 in category field
3770         unset($data->category);
3771     }
3772     $movecat = (isset($data->category) and $oldcourse->category != $data->category);
3773
3774     if (!isset($data->visible)) {
3775         // data not from form, add missing visibility info
3776         $data->visible = $oldcourse->visible;
3777     }
3778
3779     if ($data->visible != $oldcourse->visible) {
3780         // reset the visibleold flag when manually hiding/unhiding course
3781         $data->visibleold = $data->visible;
3782     } else {
3783         if ($movecat) {
3784             $newcategory = $DB->get_record('course_categories', array('id'=>$data->category));
3785             if (empty($newcategory->visible)) {
3786                 // make sure when moving into hidden category the course is hidden automatically
3787                 $data->visible = 0;
3788             }
3789         }
3790     }
3791
3792     // Update with the new data
3793     $DB->update_record('course', $data);
3794
3795     $course = $DB->get_record('course', array('id'=>$data->id));
3796
3797     if ($movecat) {
3798         $newparent = get_context_instance(CONTEXT_COURSECAT, $course->category);
3799         context_moved($context, $newparent);
3800     }
3801
3802     fix_course_sortorder();
3803
3804     // Test for and remove blocks which aren't appropriate anymore
3805     blocks_remove_inappropriate($course);
3806
3807     // update module restrictions
3808     if (isset($data->allowedmods)) {
3809         update_restricted_mods($course, $data->allowedmods);
3810     }
3811
3812     // Save any custom role names.
3813     save_local_role_names($course->id, $data);
3814
3815     // update enrol settings
3816     enrol_course_updated(false, $course, $data);
3817
3818     add_to_log($course->id, "course", "update", "edit.php?id=$course->id", $course->id);
3819
3820     // Trigger events
3821     events_trigger('course_updated', $course);
3822 }
3823
3824 /**
3825  * Average number of participants
3826  * @return integer
3827  */
3828 function average_number_of_participants() {
3829     global $DB, $SITE;
3830
3831     //count total of enrolments for visible course (except front page)
3832     $sql = 'SELECT COUNT(*) FROM (
3833         SELECT DISTINCT ue.userid, e.courseid
3834         FROM {user_enrolments} ue, {enrol} e, {course} c
3835         WHERE ue.enrolid = e.id
3836             AND e.courseid <> :siteid
3837             AND c.id = e.courseid
3838             AND c.visible = 1) as total';
3839     $params = array('siteid' => $SITE->id);
3840     $enrolmenttotal = $DB->count_records_sql($sql, $params);
3841
3842
3843     //count total of visible courses (minus front page)
3844     $coursetotal = $DB->count_records('course', array('visible' => 1));
3845     $coursetotal = $coursetotal - 1 ;
3846
3847     //average of enrolment
3848     if (empty($coursetotal)) {
3849         $participantaverage = 0;
3850     } else {
3851         $participantaverage = $enrolmenttotal / $coursetotal;
3852     }
3853
3854     return $participantaverage;
3855 }
3856
3857 /**
3858  * Average number of course modules
3859  * @return integer
3860  */
3861 function average_number_of_courses_modules() {
3862     global $DB, $SITE;
3863
3864     //count total of visible course module (except front page)
3865     $sql = 'SELECT COUNT(*) FROM (
3866         SELECT cm.course, cm.module
3867         FROM {course} c, {course_modules} cm
3868         WHERE c.id = cm.course
3869             AND c.id <> :siteid
3870             AND cm.visible = 1
3871             AND c.visible = 1) as total';
3872     $params = array('siteid' => $SITE->id);
3873     $moduletotal = $DB->count_records_sql($sql, $params);
3874
3875
3876     //count total of visible courses (minus front page)
3877     $coursetotal = $DB->count_records('course', array('visible' => 1));
3878     $coursetotal = $coursetotal - 1 ;
3879
3880     //average of course module
3881     if (empty($coursetotal)) {
3882         $coursemoduleaverage = 0;
3883     } else {
3884         $coursemoduleaverage = $moduletotal / $coursetotal;
3885     }
3886
3887     return $coursemoduleaverage;
3888 }
3889
3890 /**
3891  * This class pertains to course requests and contains methods associated with
3892  * create, approving, and removing course requests.
3893  *
3894  * Please note we do not allow embedded images here because there is no context
3895  * to store them with proper access control.
3896  *
3897  * @copyright 2009 Sam Hemelryk
3898  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
3899  * @since Moodle 2.0
3900  *
3901  * @property-read int $id
3902  * @property-read string $fullname
3903  * @property-read string $shortname
3904  * @property-read string $summary
3905  * @property-read int $summaryformat
3906  * @property-read int $summarytrust
3907  * @property-read string $reason
3908  * @property-read int $requester
3909  */
3910 class course_request {
3911
3912     /**
3913      * This is the stdClass that stores the properties for the course request
3914      * and is externally accessed through the __get magic method
3915      * @var stdClass
3916      */
3917     protected $properties;
3918
3919     /**
3920      * An array of options for the summary editor used by course request forms.
3921      * This is initially set by {@link summary_editor_options()}
3922      * @var array
3923      * @static
3924      */
3925     protected static $summaryeditoroptions;
3926
3927     /**
3928      * Static function to prepare the summary editor for working with a course
3929      * request.
3930      *
3931      * @static
3932      * @param null|stdClass $data Optional, an object containing the default values
3933      *                       for the form, these may be modified when preparing the
3934      *                       editor so this should be called before creating the form
3935      * @return stdClass An object that can be used to set the default values for
3936      *                   an mforms form
3937      */
3938     public static function prepare($data=null) {
3939         if ($data === null) {
3940             $data = new stdClass;
3941         }
3942         $data = file_prepare_standard_editor($data, 'summary', self::summary_editor_options());
3943         return $data;
3944     }
3945
3946     /**
3947      * Static function to create a new course request when passed an array of properties
3948      * for it.
3949      *
3950      * This function also handles saving any files that may have been used in the editor
3951      *
3952      * @static
3953      * @param stdClass $data
3954      * @return course_request The newly created course request
3955      */
3956     public static function create($data) {
3957         global $USER, $DB, $CFG;
3958         $data->requester = $USER->id;
3959
3960         // Summary is a required field so copy the text over
3961         $data->summary       = $data->summary_editor['text'];
3962         $data->summaryformat = $data->summary_editor['format'];
3963
3964         $data->id = $DB->insert_record('course_request', $data);
3965
3966         // Create a new course_request object and return it
3967         $request = new course_request($data);
3968
3969         // Notify the admin if required.
3970         if ($users = get_users_from_config($CFG->courserequestnotify, 'moodle/site:approvecourse')) {
3971
3972             $a = new stdClass;
3973             $a->link = "$CFG->wwwroot/course/pending.php";
3974             $a->user = fullname($USER);
3975             $subject = get_string('courserequest');
3976             $message = get_string('courserequestnotifyemail', 'admin', $a);
3977             foreach ($users as $user) {
3978                 $request->notify($user, $USER, 'courserequested', $subject, $message);
3979             }
3980         }
3981
3982         return $request;
3983     }
3984
3985     /**
3986      * Returns an array of options to use with a summary editor
3987      *
3988      * @uses course_request::$summaryeditoroptions
3989      * @return array An array of options to use with the editor
3990      */
3991     public static function summary_editor_options() {
3992         global $CFG;
3993         if (self::$summaryeditoroptions === null) {
3994             self::$summaryeditoroptions = array('maxfiles' => 0, 'maxbytes'=>0);
3995         }
3996         return self::$summaryeditoroptions;
3997     }
3998
3999     /**
4000      * Loads the properties for this course request object. Id is required and if
4001      * only id is provided then we load the rest of the properties from the database
4002      *
4003      * @param stdClass|int $properties Either an object containing properties
4004      *                      or the course_request id to load
4005      */
4006     public function __construct($properties) {
4007         global $DB;
4008         if (empty($properties->id)) {
4009             if (empty($properties)) {
4010                 throw new coding_exception('You must provide a course request id when creating a course_request object');
4011             }
4012             $id = $properties;
4013             $properties = new stdClass;
4014             $properties->id = (int)$id;
4015             unset($id);
4016         }
4017         if (empty($properties->requester)) {
4018             if (!($this->properties = $DB->get_record('course_request', array('id' => $properties->id)))) {
4019                 print_error('unknowncourserequest');
4020             }
4021         } else {
4022             $this->properties = $properties;
4023         }
4024         $this->properties->collision = null;
4025     }
4026
4027     /**
4028      * Returns the requested property
4029      *
4030      * @param string $key
4031      * @return mixed
4032      */
4033     public function __get($key) {
4034         return $this->properties->$key;
4035     }
4036
4037     /**
4038      * Override this to ensure empty($request->blah) calls return a reliable answer...
4039      *
4040      * This is required because we define the __get method
4041      *
4042      * @param mixed $key
4043      * @return bool True is it not empty, false otherwise
4044      */
4045     public function __isset($key) {
4046         return (!empty($this->properties->$key));
4047     }
4048
4049     /**
4050      * Returns the user who requested this course
4051      *
4052      * Uses a static var to cache the results and cut down the number of db queries
4053      *
4054      * @staticvar array $requesters An array of cached users
4055      * @return stdClass The user who requested the course
4056      */
4057     public function get_requester() {
4058         global $DB;
4059         static $requesters= array();
4060         if (!array_key_exists($this->properties->requester, $requesters)) {
4061             $requesters[$this->properties->requester] = $DB->get_record('user', array('id'=>$this->properties->requester));
4062         }
4063         return $requesters[$this->properties->requester];
4064     }
4065
4066     /**
4067      * Checks that the shortname used by the course does not conflict with any other
4068      * courses that exist
4069      *
4070      * @param string|null $shortnamemark The string to append to the requests shortname
4071      *                     should a conflict be found
4072      * @return bool true is there is a conflict, false otherwise
4073      */
4074     public function check_shortname_collision($shortnamemark = '[*]') {
4075         global $DB;
4076
4077         if ($this->properties->collision !== null) {
4078             return $this->properties->collision;
4079         }
4080
4081         if (empty($this->properties->shortname)) {
4082             debugging('Attempting to check a course request shortname before it has been set', DEBUG_DEVELOPER);
4083             $this->properties->collision = false;
4084         } else if ($DB->record_exists('course', array('shortname' => $this->properties->shortname))) {
4085             if (!empty($shortnamemark)) {
4086                 $this->properties->shortname .= ' '.$shortnamemark;
4087             }
4088             $this->properties->collision = true;
4089         } else {
4090             $this->properties->collision = false;
4091         }
4092         return $this->properties->collision;
4093     }
4094
4095     /**
4096      * This function approves the request turning it into a course
4097      *
4098      * This function converts the course request into a course, at the same time
4099      * transferring any files used in the summary to the new course and then removing
4100      * the course request and the files associated with it.
4101      *
4102      * @return int The id of the course that was created from this request
4103      */
4104     public function approve() {
4105         global $CFG, $DB, $USER;
4106
4107         $user = $DB->get_record('user', array('id' => $this->properties->requester, 'deleted'=>0), '*', MUST_EXIST);
4108
4109         $category = get_course_category($CFG->defaultrequestcategory);
4110         $courseconfig = get_config('moodlecourse');
4111
4112         // Transfer appropriate settings
4113         $data = clone($this->properties);
4114         unset($data->id);
4115         unset($data->reason);
4116         unset($data->requester);
4117
4118         // Set category
4119         $data->category = $category->id;
4120         $data->sortorder = $category->sortorder; // place as the first in category
4121
4122         // Set misc settings
4123         $data->requested = 1;
4124         if (!empty($CFG->restrictmodulesfor) && $CFG->restrictmodulesfor != 'none' && !empty($CFG->restrictbydefault)) {
4125             $data->restrictmodules = 1;
4126         }
4127
4128         // Apply course default settings
4129         $data->format             = $courseconfig->format;
4130         $data->numsections        = $courseconfig->numsections;
4131         $data->hiddensections     = $courseconfig->hiddensections;
4132         $data->newsitems          = $courseconfig->newsitems;
4133         $data->showgrades         = $courseconfig->showgrades;
4134         $data->showreports        = $courseconfig->showreports;
4135         $data->maxbytes           = $courseconfig->maxbytes;
4136         $data->groupmode          = $courseconfig->groupmode;
4137         $data->groupmodeforce     = $courseconfig->groupmodeforce;
4138         $data->visible            = $courseconfig->visible;
4139         $data->visibleold         = $data->visible;
4140         $data->lang               = $courseconfig->lang;
4141
4142         $course = create_course($data);
4143         $context = get_context_instance(CONTEXT_COURSE, $course->id, MUST_EXIST);
4144
4145         // add enrol instances
4146         if (!$DB->record_exists('enrol', array('courseid'=>$course->id, 'enrol'=>'manual'))) {
4147             if ($manual = enrol_get_plugin('manual')) {
4148                 $manual->add_default_instance($course);
4149             }
4150         }
4151
4152         // enrol the requester as teacher if necessary
4153         if (!empty($CFG->creatornewroleid) and !is_viewing($context, $user, 'moodle/role:assign') and !is_enrolled($context, $user, 'moodle/role:assign')) {
4154             enrol_try_internal_enrol($course->id, $user->id, $CFG->creatornewroleid);
4155         }
4156
4157         $this->delete();
4158
4159         $a = new stdClass();
4160         $a->name = $course->fullname;
4161         $a->url = $CFG->wwwroot.'/course/view.php?id=' . $course->id;
4162         $this->notify($user, $USER, 'courserequestapproved', get_string('courseapprovedsubject'), get_string('courseapprovedemail2', 'moodle', $a));
4163
4164         return $course->id;
4165     }
4166
4167     /**
4168      * Reject a course request
4169      *
4170      * This function rejects a course request, emailing the requesting user the
4171      * provided notice and then removing the request from the database
4172      *
4173      * @param string $notice The message to display to the user
4174      */
4175     public function reject($notice) {
4176         global $USER, $DB;
4177         $user = $DB->get_record('user', array('id' => $this->properties->requester), '*', MUST_EXIST);
4178         $this->notify($user, $USER, 'courserequestrejected', get_string('courserejectsubject'), get_string('courserejectemail', 'moodle', $notice));
4179         $this->delete();
4180     }
4181
4182     /**
4183      * Deletes the course request and any associated files
4184      */
4185     public function delete() {
4186         global $DB;
4187         $DB->delete_records('course_request', array('id' => $this->properties->id));
4188     }
4189
4190     /**
4191      * Send a message from one user to another using events_trigger
4192      *
4193      * @param object $touser
4194      * @param object $fromuser
4195      * @param string $name
4196      * @param string $subject
4197      * @param string $message
4198      */
4199     protected function notify($touser, $fromuser, $name='courserequested', $subject, $message) {
4200         $eventdata = new stdClass();
4201         $eventdata->component         = 'moodle';
4202         $eventdata->name              = $name;
4203         $eventdata->userfrom          = $fromuser;
4204         $eventdata->userto            = $touser;
4205         $eventdata->subject           = $subject;
4206         $eventdata->fullmessage       = $message;
4207         $eventdata->fullmessageformat = FORMAT_PLAIN;
4208         $eventdata->fullmessagehtml   = '';
4209         $eventdata->smallmessage      = '';
4210         $eventdata->notification      = 1;
4211         message_send($eventdata);
4212     }
4213 }
4214
4215 /**
4216  * Return a list of page types
4217  * @param string $pagetype current page type
4218  * @param stdClass $parentcontext Block's parent context
4219  * @param stdClass $currentcontext Current context of block
4220  */
4221 function course_pagetypelist($pagetype, $parentcontext, $currentcontext) {
4222     // if above course context ,display all course fomats
4223     list($currentcontext, $course, $cm) = get_context_info_array($currentcontext->id);
4224     if ($course->id == SITEID) {
4225         return array('*'=>get_string('page-x', 'pagetype'));
4226     } else {
4227         return array('*'=>get_string('page-x', 'pagetype'),
4228             'course-*'=>get_string('page-course-x', 'pagetype'),
4229             'course-view-*'=>get_string('page-course-view-x', 'pagetype'),
4230             'mod-*'=>get_string('page-mod-x', 'pagetype')
4231         );
4232     }
4233 }