course/lib.php

   1 <?php  // $Id$
   2    // Library of useful functions
   3
   4
   5 if (defined('COURSE_MAX_LOG_DISPLAY')) {  // Being included again - should never happen!!
   6     return;
   7 }
   8
   9 define('COURSE_MAX_LOG_DISPLAY', 150);          // days
  10 define('COURSE_MAX_LOGS_PER_PAGE', 1000);       // records
  11 define('COURSE_LIVELOG_REFRESH', 60);           // Seconds
  12 define('COURSE_MAX_RECENT_PERIOD', 172800);     // Two days, in seconds
  13 define('COURSE_MAX_SUMMARIES_PER_PAGE', 10);    // courses
  14 define('COURSE_MAX_COURSES_PER_DROPDOWN',1000); //  max courses in log dropdown before switching to optional
  15 define('COURSE_MAX_USERS_PER_DROPDOWN',1000);   //  max users in log dropdown before switching to optional
  16 define('FRONTPAGENEWS', 0);
  17 define('FRONTPAGECOURSELIST',     1);
  18 define('FRONTPAGECATEGORYNAMES',  2);
  19 define('FRONTPAGETOPICONLY',      3);
  20 define('FRONTPAGECATEGORYCOMBO',  4);
  21 define('FRONTPAGECOURSELIMIT',    200);         // maximum number of courses displayed on the frontpage
  22 define('EXCELROWS', 65535);
  23 define('FIRSTUSEDEXCELROW', 3);
  24
  25 define('MOD_CLASS_ACTIVITY', 0);
  26 define('MOD_CLASS_RESOURCE', 1);
  27
  28
  29 function print_recent_selector_form($course, $advancedfilter=0, $selecteduser=0, $selecteddate="lastlogin",
  30                                     $mod="", $modid="activity/All", $modaction="", $selectedgroup="", $selectedsort="default") {
  31
  32     global $USER, $CFG;
  33
  34     if ($advancedfilter) {
  35
  36         // Get all the possible users
  37         $users = array();
  38
  39         if ($courseusers = get_course_users($course->id, '', '', 'u.id, u.firstname, u.lastname')) {
  40             foreach ($courseusers as $courseuser) {
  41                 $users[$courseuser->id] = fullname($courseuser, has_capability('moodle/site:viewfullnames', get_context_instance(CONTEXT_COURSE, $course->id)));
  42             }
  43         }
  44         if ($guest = get_guest()) {
  45             $users[$guest->id] = fullname($guest);
  46         }
  47
  48         if (has_capability('moodle/course:update', get_context_instance(CONTEXT_SYSTEM, SITEID))) {
  49             if ($ccc = get_records("course", "", "", "fullname")) {
  50                 foreach ($ccc as $cc) {
  51                     if ($cc->category) {
  52                         $courses["$cc->id"] = "$cc->fullname";
  53                     } else {
  54                         $courses["$cc->id"] = " $cc->fullname (Site)";
  55                     }
  56                 }
  57             }
  58             asort($courses);
  59         }
  60
  61         $activities = array();
  62
  63         $selectedactivity = $modid;
  64
  65     /// Casting $course->modinfo to string prevents one notice when the field is null
  66         if ($modinfo = unserialize((string)$course->modinfo)) {
  67             $section = 0;
  68             if ($course->format == 'weeks') {  // Body
  69                 $strsection = get_string("week");
  70             } else {
  71                 $strsection = get_string("topic");
  72             }
  73
  74             $activities["activity/All"] = "All activities";
  75             $activities["activity/Assignments"] =  "All assignments";
  76             $activities["activity/Chats"] = "All chats";
  77             $activities["activity/Forums"] = "All forums";
  78             $activities["activity/Quizzes"] = "All quizzes";
  79             $activities["activity/Workshops"] = "All workshops";
  80
  81             $activities["section/individual"] = "------------- Individual Activities --------------";
  82
  83             foreach ($modinfo as $mod) {
  84                 if ($mod->mod == "label") {
  85                     continue;
  86                 }
  87                 if (!$mod->visible and !has_capability('moodle/course:viewhiddenactivities',get_context_instance(CONTEXT_MODULE, $mod->cm))) {
  88                     continue;
  89                 }
  90                 $mod->id = $mod->cm;
  91                 if (!groups_course_module_visible($mod)) {
  92                     continue;
  93                 }
  94
  95                 if ($mod->section > 0 and $section <> $mod->section) {
  96                     $activities["section/$mod->section"] = "-------------- $strsection $mod->section --------------";
  97                 }
  98                 $section = $mod->section;
  99                 $mod->name = strip_tags(format_string(urldecode($mod->name),true));
 100                 if (strlen($mod->name) > 55) {
 101                     $mod->name = substr($mod->name, 0, 50)."...";
 102                 }
 103                 if (!$mod->visible) {
 104                     $mod->name = "(".$mod->name.")";
 105                 }
 106                 $activities["$mod->cm"] = $mod->name;
 107
 108                 if ($mod->cm == $modid) {
 109                     $selectedactivity = "$mod->cm";
 110                 }
 111             }
 112         }
 113
 114         $strftimedate = get_string("strftimedate");
 115         $strftimedaydate = get_string("strftimedaydate");
 116
 117         asort($users);
 118
 119         // Get all the possible dates
 120         // Note that we are keeping track of real (GMT) time and user time
 121         // User time is only used in displays - all calcs and passing is GMT
 122
 123         $timenow = time(); // GMT
 124
 125         // What day is it now for the user, and when is midnight that day (in GMT).
 126         $timemidnight = $today = usergetmidnight($timenow);
 127
 128         $dates = array();
 129         $dates["$USER->lastlogin"] = get_string("lastlogin").", ".userdate($USER->lastlogin, $strftimedate);
 130         $dates["$timemidnight"] = get_string("today").", ".userdate($timenow, $strftimedate);
 131
 132         if (!$course->startdate or ($course->startdate > $timenow)) {
 133             $course->startdate = $course->timecreated;
 134         }
 135
 136         $numdates = 1;
 137         while ($timemidnight > $course->startdate and $numdates < 365) {
 138             $timemidnight = $timemidnight - 86400;
 139             $timenow = $timenow - 86400;
 140             $dates["$timemidnight"] = userdate($timenow, $strftimedaydate);
 141             $numdates++;
 142         }
 143
 144         if ($selecteddate === "lastlogin") {
 145             $selecteddate = $USER->lastlogin;
 146         }
 147
 148         echo '<form action="recent.php" method="get">';
 149         echo '<input type="hidden" name="chooserecent" value="1" />';
 150         echo "<center>";
 151         echo "<table>";
 152
 153         if (has_capability('moodle/course:update', get_context_instance(CONTEXT_SYSTEM, SITEID))) {
 154             echo "<tr><td><b>" . get_string("courses") . "</b></td><td>";
 155             choose_from_menu ($courses, "id", $course->id, "");
 156             echo "</td></tr>";
 157         } else {
 158             echo '<input type="hidden" name="id" value="'.$course->id.'" />';
 159         }
 160
 161         $sortfields = array("default" => get_string("bycourseorder"),"dateasc" => get_string("datemostrecentlast"), "datedesc" => get_string("datemostrecentfirst"));
 162
 163         echo "<tr><td><b>" . get_string("participants") . "</b></td><td>";
 164         choose_from_menu ($users, "user", $selecteduser, get_string("allparticipants") );
 165         echo "</td>";
 166
 167         echo '<td align="right"><b>' . get_string("since") . '</b></td><td>';
 168         choose_from_menu ($dates, "date", $selecteddate, get_string("alldays"));
 169         echo "</td></tr>";
 170
 171         echo "<tr><td><b>" . get_string("activities") . "</b></td><td>";
 172         choose_from_menu ($activities, "modid", $selectedactivity, "");
 173         echo "</td>";
 174
 175         echo '<td align="right"><b>' . get_string("sortby") . "</b></td><td>";
 176         choose_from_menu ($sortfields, "sortby", $selectedsort, "");
 177         echo "</td></tr>";
 178
 179         echo '<tr>';
 180
 181         $groupmode =  groups_get_course_groupmode($course);
 182
 183         if ($groupmode == VISIBLEGROUPS or ($groupmode and has_capability('moodle/course:managegroups', get_context_instance(CONTEXT_COURSE, $course->id)))) {
 184             if ($groups = groups_get_all_groups($course->id)) {
 185                 $group_names = array();
 186                 foreach($groups as $group) {
 187                     $group_names[$group->id] = format_string($group->name);
 188                 }
 189                 echo '<td><b>';
 190                 if ($groupmode == VISIBLEGROUPS) {
 191                     print_string('groupsvisible');
 192                 } else {
 193                     print_string('groupsseparate');
 194                 }
 195                 echo ':</b></td><td>';
 196                 choose_from_menu($group_names, "selectedgroup", $selectedgroup, get_string("allgroups"), "", "");
 197                 echo '</td>';
 198             }
 199         }
 200
 201
 202         echo '<td colspan="2" align="right">';
 203         echo '<input type="submit" value="'.get_string('showrecent').'" />';
 204         echo "</td></tr>";
 205
 206         echo "</table>";
 207
 208         $advancedlink = "<a href=\"$CFG->wwwroot/course/recent.php?id=$course->id&amp;advancedfilter=0\">" . get_string("normalfilter") . "</a>";
 209         print_heading($advancedlink);
 210         echo "</center>";
 211         echo "</form>";
 212
 213     } else {
 214
 215         $day_list = array("1","7","14","21","30");
 216         $strsince = get_string("since");
 217         $strlastlogin = get_string("lastlogin");
 218         $strday = get_string("day");
 219         $strdays = get_string("days");
 220
 221         $heading = "";
 222         foreach ($day_list as $count)  {
 223             if ($count == "1") {
 224               $day = $strday;
 225             } else {
 226               $day = $strdays;
 227             }
 228             $tmpdate = time() - ($count * 3600 * 24);
 229             $heading = $heading .
 230                 "<a href=\"$CFG->wwwroot/course/recent.php?id=$course->id&amp;date=$tmpdate\"> $count $day</a> | ";
 231         }
 232
 233         $heading = $strsince . ": <a href=\"$CFG->wwwroot/course/recent.php?id=$course->id\">$strlastlogin</a>" . " | " . $heading;
 234         print_heading($heading);
 235
 236         $advancedlink = "<a href=\"$CFG->wwwroot/course/recent.php?id=$course->id&amp;advancedfilter=1\">" . get_string("advancedfilter") . "</a>";
 237         print_heading($advancedlink);
 238
 239     }
 240
 241 }
 242
 243
 244 function make_log_url($module, $url) {
 245     switch ($module) {
 246         case 'user':
 247         case 'course':
 248         case 'file':
 249         case 'login':
 250         case 'lib':
 251         case 'admin':
 252         case 'message':
 253         case 'calendar':
 254         case 'mnet course':
 255             return "/course/$url";
 256             break;
 257         case 'blog':
 258             return "/$module/$url";
 259             break;
 260         case 'upload':
 261             return $url;
 262             break;
 263         case 'library':
 264         case '':
 265             return '/';
 266             break;
 267         default:
 268             return "/mod/$module/$url";
 269             break;
 270     }
 271 }
 272
 273
 274 function build_mnet_logs_array($hostid, $course, $user=0, $date=0, $order="l.time ASC", $limitfrom='', $limitnum='',
 275                    $modname="", $modid=0, $modaction="", $groupid=0) {
 276
 277     global $CFG;
 278
 279     // It is assumed that $date is the GMT time of midnight for that day,
 280     // and so the next 86400 seconds worth of logs are printed.
 281
 282     /// Setup for group handling.
 283
 284     // TODO: I don't understand group/context/etc. enough to be able to do
 285     // something interesting with it here
 286     // What is the context of a remote course?
 287
 288     /// If the group mode is separate, and this user does not have editing privileges,
 289     /// then only the user's group can be viewed.
 290     //if ($course->groupmode == SEPARATEGROUPS and !has_capability('moodle/course:managegroups', get_context_instance(CONTEXT_COURSE, $course->id))) {
 291     //    $groupid = get_current_group($course->id);
 292     //}
 293     /// If this course doesn't have groups, no groupid can be specified.
 294     //else if (!$course->groupmode) {
 295     //    $groupid = 0;
 296     //}
 297     $groupid = 0;
 298
 299     $joins = array();
 300
 301     $qry = "
 302             SELECT
 303                 l.*,
 304                 u.firstname,
 305                 u.lastname,
 306                 u.picture
 307             FROM
 308                 {$CFG->prefix}mnet_log l
 309             LEFT JOIN
 310                 {$CFG->prefix}user u
 311             ON
 312                 l.userid = u.id
 313             WHERE
 314                 ";
 315
 316     $where .= "l.hostid = '$hostid'";
 317
 318     // TODO: Is 1 really a magic number referring to the sitename?
 319     if ($course != 1 || $modid != 0) {
 320         $where .= " AND\n                l.course='$course'";
 321     }
 322
 323     if ($modname) {
 324         $where .= " AND\n                l.module = '$modname'";
 325     }
 326
 327     if ('site_errors' === $modid) {
 328         $where .= " AND\n                ( l.action='error' OR l.action='infected' )";
 329     } else if ($modid) {
 330         //TODO: This assumes that modids are the same across sites... probably
 331         //not true
 332         $where .= " AND\n                l.cmid = '$modid'";
 333     }
 334
 335     if ($modaction) {
 336         $firstletter = substr($modaction, 0, 1);
 337         if (ctype_alpha($firstletter)) {
 338             $where .= " AND\n                lower(l.action) LIKE '%" . strtolower($modaction) . "%'";
 339         } else if ($firstletter == '-') {
 340             $where .= " AND\n                lower(l.action) NOT LIKE '%" . strtolower(substr($modaction, 1)) . "%'";
 341         }
 342     }
 343
 344     if ($user) {
 345         $where .= " AND\n                l.userid = '$user'";
 346     }
 347
 348     if ($date) {
 349         $enddate = $date + 86400;
 350         $where .= " AND\n                l.time > '$date' AND l.time < '$enddate'";
 351     }
 352
 353     $result = array();
 354     $result['totalcount'] = count_records_sql("SELECT COUNT(*) FROM {$CFG->prefix}mnet_log l WHERE $where");
 355     if(!empty($result['totalcount'])) {
 356         $where .= "\n            ORDER BY\n                $order";
 357         $result['logs'] = get_records_sql($qry.$where, $limitfrom, $limitnum);
 358     } else {
 359         $result['logs'] = array();
 360     }
 361     return $result;
 362 }
 363
 364 function build_logs_array($course, $user=0, $date=0, $order="l.time ASC", $limitfrom='', $limitnum='',
 365                    $modname="", $modid=0, $modaction="", $groupid=0) {
 366
 367     // It is assumed that $date is the GMT time of midnight for that day,
 368     // and so the next 86400 seconds worth of logs are printed.
 369
 370     /// Setup for group handling.
 371
 372     /// If the group mode is separate, and this user does not have editing privileges,
 373     /// then only the user's group can be viewed.
 374     if ($course->groupmode == SEPARATEGROUPS and !has_capability('moodle/course:managegroups', get_context_instance(CONTEXT_COURSE, $course->id))) {
 375         $groupid = get_current_group($course->id);
 376     }
 377     /// If this course doesn't have groups, no groupid can be specified.
 378     else if (!$course->groupmode) {
 379         $groupid = 0;
 380     }
 381
 382     $joins = array();
 383
 384     if ($course->id != SITEID || $modid != 0) {
 385         $joins[] = "l.course='$course->id'";
 386     }
 387
 388     if ($modname) {
 389         $joins[] = "l.module = '$modname'";
 390     }
 391
 392     if ('site_errors' === $modid) {
 393         $joins[] = "( l.action='error' OR l.action='infected' )";
 394     } else if ($modid) {
 395         $joins[] = "l.cmid = '$modid'";
 396     }
 397
 398     if ($modaction) {
 399         $firstletter = substr($modaction, 0, 1);
 400         if (ctype_alpha($firstletter)) {
 401             $joins[] = "lower(l.action) LIKE '%" . strtolower($modaction) . "%'";
 402         } else if ($firstletter == '-') {
 403             $joins[] = "lower(l.action) NOT LIKE '%" . strtolower(substr($modaction, 1)) . "%'";
 404         }
 405     }
 406
 407     /// Getting all members of a group.
 408     if ($groupid and !$user) {
 409         if ($gusers = groups_get_members($groupid)) {
 410             $gusers = array_keys($gusers);
 411             $joins[] = 'l.userid IN (' . implode(',', $gusers) . ')';
 412         } else {
 413             $joins[] = 'l.userid = 0'; // No users in groups, so we want something that will always by false.
 414         }
 415     }
 416     else if ($user) {
 417         $joins[] = "l.userid = '$user'";
 418     }
 419
 420     if ($date) {
 421         $enddate = $date + 86400;
 422         $joins[] = "l.time > '$date' AND l.time < '$enddate'";
 423     }
 424
 425     $selector = implode(' AND ', $joins);
 426
 427     $totalcount = 0;  // Initialise
 428     $result = array();
 429     $result['logs'] = get_logs($selector, $order, $limitfrom, $limitnum, $totalcount);
 430     $result['totalcount'] = $totalcount;
 431     return $result;
 432 }
 433
 434
 435 function print_log($course, $user=0, $date=0, $order="l.time ASC", $page=0, $perpage=100,
 436                    $url="", $modname="", $modid=0, $modaction="", $groupid=0) {
 437
 438     global $CFG;
 439
 440     if (!$logs = build_logs_array($course, $user, $date, $order, $page*$perpage, $perpage,
 441                        $modname, $modid, $modaction, $groupid)) {
 442         notify("No logs found!");
 443         print_footer($course);
 444         exit;
 445     }
 446
 447     $courses = array();
 448
 449     if ($course->id == SITEID) {
 450         $courses[0] = '';
 451         if ($ccc = get_courses('all', 'c.id ASC', 'c.id,c.shortname')) {
 452             foreach ($ccc as $cc) {
 453                 $courses[$cc->id] = $cc->shortname;
 454             }
 455         }
 456     } else {
 457         $courses[$course->id] = $course->shortname;
 458     }
 459
 460     $totalcount = $logs['totalcount'];
 461     $count=0;
 462     $ldcache = array();
 463     $tt = getdate(time());
 464     $today = mktime (0, 0, 0, $tt["mon"], $tt["mday"], $tt["year"]);
 465
 466     $strftimedatetime = get_string("strftimedatetime");
 467
 468     echo "<div class=\"info\">\n";
 469     print_string("displayingrecords", "", $totalcount);
 470     echo "</div>\n";
 471
 472     print_paging_bar($totalcount, $page, $perpage, "$url&amp;perpage=$perpage&amp;");
 473
 474     echo '<table class="logtable genearlbox boxaligncenter" summary="">'."\n";
 475     // echo "<table class=\"logtable\" cellpadding=\"3\" cellspacing=\"0\" summary=\"\">\n";
 476     echo "<tr>";
 477     if ($course->id == SITEID) {
 478         echo "<th class=\"c0 header\" scope=\"col\">".get_string('course')."</th>\n";
 479     }
 480     echo "<th class=\"c1 header\" scope=\"col\">".get_string('time')."</th>\n";
 481     echo "<th class=\"c2 header\" scope=\"col\">".get_string('ip_address')."</th>\n";
 482     echo "<th class=\"c3 header\" scope=\"col\">".get_string('fullname')."</th>\n";
 483     echo "<th class=\"c4 header\" scope=\"col\">".get_string('action')."</th>\n";
 484     echo "<th class=\"c5 header\" scope=\"col\">".get_string('info')."</th>\n";
 485     echo "</tr>\n";
 486
 487     // Make sure that the logs array is an array, even it is empty, to avoid warnings from the foreach.
 488     if (empty($logs['logs'])) {
 489         $logs['logs'] = array();
 490     }
 491
 492     $row = 1;
 493     foreach ($logs['logs'] as $log) {
 494
 495         $row = ($row + 1) % 2;
 496
 497         if (isset($ldcache[$log->module][$log->action])) {
 498             $ld = $ldcache[$log->module][$log->action];
 499         } else {
 500             $ld = get_record('log_display', 'module', $log->module, 'action', $log->action);
 501             $ldcache[$log->module][$log->action] = $ld;
 502         }
 503         if ($ld && is_numeric($log->info)) {
 504             // ugly hack to make sure fullname is shown correctly
 505             if (($ld->mtable == 'user') and ($ld->field == sql_concat('firstname', "' '" , 'lastname'))) {
 506                 $log->info = fullname(get_record($ld->mtable, 'id', $log->info), true);
 507             } else {
 508                 $log->info = get_field($ld->mtable, $ld->field, 'id', $log->info);
 509             }
 510         }
 511
 512         //Filter log->info
 513         $log->info = format_string($log->info);
 514
 515         $log->url  = strip_tags(urldecode($log->url));   // Some XSS protection
 516         $log->info = strip_tags(urldecode($log->info));  // Some XSS protection
 517         $log->url  = str_replace('&', '&amp;', $log->url); /// XHTML compatibility
 518
 519         echo '<tr class="r'.$row.'">';
 520         if ($course->id == SITEID) {
 521             echo "<td class=\"cell c0\">\n";
 522             if (empty($log->course)) {
 523                 echo format_string($log->info)."\n";
 524             } else {
 525                 echo "    <a href=\"{$CFG->wwwroot}/course/view.php?id={$log->course}\">". format_string($courses[$log->course])."</a>\n";
 526             }
 527             echo "</td>\n";
 528         }
 529         echo "<td class=\"cell c1\" align=\"right\">".userdate($log->time, '%a').
 530              ' '.userdate($log->time, $strftimedatetime)."</td>\n";
 531         echo "<td class=\"cell c2\">\n";
 532         link_to_popup_window("/iplookup/index.php?ip=$log->ip&amp;user=$log->userid", 'iplookup',$log->ip, 400, 700);
 533         echo "</td>\n";
 534         $fullname = fullname($log, has_capability('moodle/site:viewfullnames', get_context_instance(CONTEXT_COURSE, $course->id)));
 535         echo "<td class=\"cell c3\">\n";
 536         echo "    <a href=\"$CFG->wwwroot/user/view.php?id={$log->userid}&amp;course={$log->course}\">$fullname</a>\n";
 537         echo "</td>\n";
 538         echo "<td class=\"cell c4\">\n";
 539         link_to_popup_window( make_log_url($log->module,$log->url), 'fromloglive',"$log->module $log->action", 400, 600);
 540         echo "</td>\n";;
 541         echo "<td class=\"cell c5\">{$log->info}</td>\n";
 542         echo "</tr>\n";
 543     }
 544     echo "</table>\n";
 545
 546     print_paging_bar($totalcount, $page, $perpage, "$url&amp;perpage=$perpage&amp;");
 547 }
 548
 549
 550 function print_mnet_log($hostid, $course, $user=0, $date=0, $order="l.time ASC", $page=0, $perpage=100,
 551                    $url="", $modname="", $modid=0, $modaction="", $groupid=0) {
 552
 553     global $CFG;
 554
 555     if (!$logs = build_mnet_logs_array($hostid, $course, $user, $date, $order, $page*$perpage, $perpage,
 556                        $modname, $modid, $modaction, $groupid)) {
 557         notify("No logs found!");
 558         print_footer($course);
 559         exit;
 560     }
 561
 562     if ($course->id == SITEID) {
 563         $courses[0] = '';
 564         if ($ccc = get_courses('all', 'c.id ASC', 'c.id,c.shortname,c.visible')) {
 565             foreach ($ccc as $cc) {
 566                 $courses[$cc->id] = $cc->shortname;
 567             }
 568         }
 569     }
 570
 571     $totalcount = $logs['totalcount'];
 572     $count=0;
 573     $ldcache = array();
 574     $tt = getdate(time());
 575     $today = mktime (0, 0, 0, $tt["mon"], $tt["mday"], $tt["year"]);
 576
 577     $strftimedatetime = get_string("strftimedatetime");
 578
 579     echo "<div class=\"info\">\n";
 580     print_string("displayingrecords", "", $totalcount);
 581     echo "</div>\n";
 582
 583     print_paging_bar($totalcount, $page, $perpage, "$url&amp;perpage=$perpage&amp;");
 584
 585     echo "<table class=\"logtable\" cellpadding=\"3\" cellspacing=\"0\">\n";
 586     echo "<tr>";
 587     if ($course->id == SITEID) {
 588         echo "<th class=\"c0 header\">".get_string('course')."</th>\n";
 589     }
 590     echo "<th class=\"c1 header\">".get_string('time')."</th>\n";
 591     echo "<th class=\"c2 header\">".get_string('ip_address')."</th>\n";
 592     echo "<th class=\"c3 header\">".get_string('fullname')."</th>\n";
 593     echo "<th class=\"c4 header\">".get_string('action')."</th>\n";
 594     echo "<th class=\"c5 header\">".get_string('info')."</th>\n";
 595     echo "</tr>\n";
 596
 597     if (empty($logs['logs'])) {
 598         echo "</table>\n";
 599         return;
 600     }
 601
 602     $row = 1;
 603     foreach ($logs['logs'] as $log) {
 604
 605         $log->info = $log->coursename;
 606         $row = ($row + 1) % 2;
 607
 608         if (isset($ldcache[$log->module][$log->action])) {
 609             $ld = $ldcache[$log->module][$log->action];
 610         } else {
 611             $ld = get_record('log_display', 'module', $log->module, 'action', $log->action);
 612             $ldcache[$log->module][$log->action] = $ld;
 613         }
 614         if (0 && $ld && !empty($log->info)) {
 615             // ugly hack to make sure fullname is shown correctly
 616             if (($ld->mtable == 'user') and ($ld->field == sql_concat('firstname', "' '" , 'lastname'))) {
 617                 $log->info = fullname(get_record($ld->mtable, 'id', $log->info), true);
 618             } else {
 619                 $log->info = get_field($ld->mtable, $ld->field, 'id', $log->info);
 620             }
 621         }
 622
 623         //Filter log->info
 624         $log->info = format_string($log->info);
 625
 626         $log->url  = strip_tags(urldecode($log->url));   // Some XSS protection
 627         $log->info = strip_tags(urldecode($log->info));  // Some XSS protection
 628         $log->url  = str_replace('&', '&amp;', $log->url); /// XHTML compatibility
 629
 630         echo '<tr class="r'.$row.'">';
 631         if ($course->id == SITEID) {
 632             echo "<td class=\"r$row c0\" >\n";
 633             echo "    <a href=\"{$CFG->wwwroot}/course/view.php?id={$log->course}\">".$courses[$log->course]."</a>\n";
 634             echo "</td>\n";
 635         }
 636         echo "<td class=\"r$row c1\" align=\"right\">".userdate($log->time, '%a').
 637              ' '.userdate($log->time, $strftimedatetime)."</td>\n";
 638         echo "<td class=\"r$row c2\" >\n";
 639         link_to_popup_window("/iplookup/index.php?ip=$log->ip&amp;user=$log->userid", 'iplookup',$log->ip, 400, 700);
 640         echo "</td>\n";
 641         $fullname = fullname($log, has_capability('moodle/site:viewfullnames', get_context_instance(CONTEXT_COURSE, $course->id)));
 642         echo "<td class=\"r$row c3\" >\n";
 643         echo "    <a href=\"$CFG->wwwroot/user/view.php?id={$log->userid}\">$fullname</a>\n";
 644         echo "</td>\n";
 645         echo "<td class=\"r$row c4\">\n";
 646         echo $log->action .': '.$log->module;
 647         echo "</td>\n";;
 648         echo "<td class=\"r$row c5\">{$log->info}</td>\n";
 649         echo "</tr>\n";
 650     }
 651     echo "</table>\n";
 652
 653     print_paging_bar($totalcount, $page, $perpage, "$url&amp;perpage=$perpage&amp;");
 654 }
 655
 656
 657 function print_log_csv($course, $user, $date, $order='l.time DESC', $modname,
 658                         $modid, $modaction, $groupid) {
 659
 660     $text = get_string('course')."\t".get_string('time')."\t".get_string('ip_address')."\t".
 661             get_string('fullname')."\t".get_string('action')."\t".get_string('info');
 662
 663     if (!$logs = build_logs_array($course, $user, $date, $order, '', '',
 664                        $modname, $modid, $modaction, $groupid)) {
 665         return false;
 666     }
 667
 668     $courses = array();
 669
 670     if ($course->id == SITEID) {
 671         $courses[0] = '';
 672         if ($ccc = get_courses('all', 'c.id ASC', 'c.id,c.shortname')) {
 673             foreach ($ccc as $cc) {
 674                 $courses[$cc->id] = $cc->shortname;
 675             }
 676         }
 677     } else {
 678         $courses[$course->id] = $course->shortname;
 679     }
 680
 681     $count=0;
 682     $ldcache = array();
 683     $tt = getdate(time());
 684     $today = mktime (0, 0, 0, $tt["mon"], $tt["mday"], $tt["year"]);
 685
 686     $strftimedatetime = get_string("strftimedatetime");
 687
 688     $filename = 'logs_'.userdate(time(),get_string('backupnameformat'),99,false);
 689     $filename .= '.txt';
 690     header("Content-Type: application/download\n");
 691     header("Content-Disposition: attachment; filename=$filename");
 692     header("Expires: 0");
 693     header("Cache-Control: must-revalidate,post-check=0,pre-check=0");
 694     header("Pragma: public");
 695
 696     echo get_string('savedat').userdate(time(), $strftimedatetime)."\n";
 697     echo $text;
 698
 699     if (empty($logs['logs'])) {
 700         return true;
 701     }
 702
 703     foreach ($logs['logs'] as $log) {
 704         if (isset($ldcache[$log->module][$log->action])) {
 705             $ld = $ldcache[$log->module][$log->action];
 706         } else {
 707             $ld = get_record('log_display', 'module', $log->module, 'action', $log->action);
 708             $ldcache[$log->module][$log->action] = $ld;
 709         }
 710         if ($ld && !empty($log->info)) {
 711             // ugly hack to make sure fullname is shown correctly
 712             if (($ld->mtable == 'user') and ($ld->field ==  sql_concat('firstname', "' '" , 'lastname'))) {
 713                 $log->info = fullname(get_record($ld->mtable, 'id', $log->info), true);
 714             } else {
 715                 $log->info = get_field($ld->mtable, $ld->field, 'id', $log->info);
 716             }
 717         }
 718
 719         //Filter log->info
 720         $log->info = format_string($log->info);
 721
 722         $log->url  = strip_tags(urldecode($log->url));     // Some XSS protection
 723         $log->info = strip_tags(urldecode($log->info));    // Some XSS protection
 724         $log->url  = str_replace('&', '&amp;', $log->url); // XHTML compatibility
 725
 726         $firstField = $courses[$log->course];
 727         $fullname = fullname($log, has_capability('moodle/site:viewfullnames', get_context_instance(CONTEXT_COURSE, $course->id)));
 728         $row = array($firstField, userdate($log->time, $strftimedatetime), $log->ip, $fullname, $log->module.' '.$log->action, $log->info);
 729         $text = implode("\t", $row);
 730         echo $text." \n";
 731     }
 732     return true;
 733 }
 734
 735
 736 function print_log_xls($course, $user, $date, $order='l.time DESC', $modname,
 737                         $modid, $modaction, $groupid) {
 738
 739     global $CFG;
 740
 741     require_once("$CFG->libdir/excellib.class.php");
 742
 743     if (!$logs = build_logs_array($course, $user, $date, $order, '', '',
 744                        $modname, $modid, $modaction, $groupid)) {
 745         return false;
 746     }
 747
 748     $courses = array();
 749
 750     if ($course->id == SITEID) {
 751         $courses[0] = '';
 752         if ($ccc = get_courses('all', 'c.id ASC', 'c.id,c.shortname')) {
 753             foreach ($ccc as $cc) {
 754                 $courses[$cc->id] = $cc->shortname;
 755             }
 756         }
 757     } else {
 758         $courses[$course->id] = $course->shortname;
 759     }
 760
 761     $count=0;
 762     $ldcache = array();
 763     $tt = getdate(time());
 764     $today = mktime (0, 0, 0, $tt["mon"], $tt["mday"], $tt["year"]);
 765
 766     $strftimedatetime = get_string("strftimedatetime");
 767
 768     $nroPages = ceil(count($logs)/(EXCELROWS-FIRSTUSEDEXCELROW+1));
 769     $filename = 'logs_'.userdate(time(),get_string('backupnameformat'),99,false);
 770     $filename .= '.xls';
 771
 772     $workbook = new MoodleExcelWorkbook('-');
 773     $workbook->send($filename);
 774
 775     $worksheet = array();
 776     $headers = array(get_string('course'), get_string('time'), get_string('ip_address'),
 777                         get_string('fullname'),    get_string('action'), get_string('info'));
 778
 779     // Creating worksheets
 780     for ($wsnumber = 1; $wsnumber <= $nroPages; $wsnumber++) {
 781         $sheettitle = get_string('excel_sheettitle', 'logs', $wsnumber).$nroPages;
 782         $worksheet[$wsnumber] =& $workbook->add_worksheet($sheettitle);
 783         $worksheet[$wsnumber]->set_column(1, 1, 30);
 784         $worksheet[$wsnumber]->write_string(0, 0, get_string('savedat').
 785                                     userdate(time(), $strftimedatetime));
 786         $col = 0;
 787         foreach ($headers as $item) {
 788             $worksheet[$wsnumber]->write(FIRSTUSEDEXCELROW-1,$col,$item,'');
 789             $col++;
 790         }
 791     }
 792
 793     if (empty($logs['logs'])) {
 794         $workbook->close();
 795         return true;
 796     }
 797
 798     $formatDate =& $workbook->add_format();
 799     $formatDate->set_num_format(get_string('log_excel_date_format'));
 800
 801     $row = FIRSTUSEDEXCELROW;
 802     $wsnumber = 1;
 803     $myxls =& $worksheet[$wsnumber];
 804     foreach ($logs['logs'] as $log) {
 805         if (isset($ldcache[$log->module][$log->action])) {
 806             $ld = $ldcache[$log->module][$log->action];
 807         } else {
 808             $ld = get_record('log_display', 'module', $log->module, 'action', $log->action);
 809             $ldcache[$log->module][$log->action] = $ld;
 810         }
 811         if ($ld && !empty($log->info)) {
 812             // ugly hack to make sure fullname is shown correctly
 813             if (($ld->mtable == 'user') and ($ld->field == sql_concat('firstname', "' '" , 'lastname'))) {
 814                 $log->info = fullname(get_record($ld->mtable, 'id', $log->info), true);
 815             } else {
 816                 $log->info = get_field($ld->mtable, $ld->field, 'id', $log->info);
 817             }
 818         }
 819
 820         // Filter log->info
 821         $log->info = format_string($log->info);
 822         $log->info = strip_tags(urldecode($log->info));  // Some XSS protection
 823
 824         if ($nroPages>1) {
 825             if ($row > EXCELROWS) {
 826                 $wsnumber++;
 827                 $myxls =& $worksheet[$wsnumber];
 828                 $row = FIRSTUSEDEXCELROW;
 829             }
 830         }
 831
 832         $myxls->write($row, 0, $courses[$log->course], '');
 833         // Excel counts from 1/1/1900
 834         $excelTime=25569+$log->time/(3600*24);
 835         $myxls->write($row, 1, $excelTime, $formatDate);
 836         $myxls->write($row, 2, $log->ip, '');
 837         $fullname = fullname($log, has_capability('moodle/site:viewfullnames', get_context_instance(CONTEXT_COURSE, $course->id)));
 838         $myxls->write($row, 3, $fullname, '');
 839         $myxls->write($row, 4, $log->module.' '.$log->action, '');
 840         $myxls->write($row, 5, $log->info, '');
 841
 842         $row++;
 843     }
 844
 845     $workbook->close();
 846     return true;
 847 }
 848
 849 function print_log_ods($course, $user, $date, $order='l.time DESC', $modname,
 850                         $modid, $modaction, $groupid) {
 851
 852     global $CFG;
 853
 854     require_once("$CFG->libdir/odslib.class.php");
 855
 856     if (!$logs = build_logs_array($course, $user, $date, $order, '', '',
 857                        $modname, $modid, $modaction, $groupid)) {
 858         return false;
 859     }
 860
 861     $courses = array();
 862
 863     if ($course->id == SITEID) {
 864         $courses[0] = '';
 865         if ($ccc = get_courses('all', 'c.id ASC', 'c.id,c.shortname')) {
 866             foreach ($ccc as $cc) {
 867                 $courses[$cc->id] = $cc->shortname;
 868             }
 869         }
 870     } else {
 871         $courses[$course->id] = $course->shortname;
 872     }
 873
 874     $count=0;
 875     $ldcache = array();
 876     $tt = getdate(time());
 877     $today = mktime (0, 0, 0, $tt["mon"], $tt["mday"], $tt["year"]);
 878
 879     $strftimedatetime = get_string("strftimedatetime");
 880
 881     $nroPages = ceil(count($logs)/(EXCELROWS-FIRSTUSEDEXCELROW+1));
 882     $filename = 'logs_'.userdate(time(),get_string('backupnameformat'),99,false);
 883     $filename .= '.ods';
 884
 885     $workbook = new MoodleODSWorkbook('-');
 886     $workbook->send($filename);
 887
 888     $worksheet = array();
 889     $headers = array(get_string('course'), get_string('time'), get_string('ip_address'),
 890                         get_string('fullname'),    get_string('action'), get_string('info'));
 891
 892     // Creating worksheets
 893     for ($wsnumber = 1; $wsnumber <= $nroPages; $wsnumber++) {
 894         $sheettitle = get_string('excel_sheettitle', 'logs', $wsnumber).$nroPages;
 895         $worksheet[$wsnumber] =& $workbook->add_worksheet($sheettitle);
 896         $worksheet[$wsnumber]->set_column(1, 1, 30);
 897         $worksheet[$wsnumber]->write_string(0, 0, get_string('savedat').
 898                                     userdate(time(), $strftimedatetime));
 899         $col = 0;
 900         foreach ($headers as $item) {
 901             $worksheet[$wsnumber]->write(FIRSTUSEDEXCELROW-1,$col,$item,'');
 902             $col++;
 903         }
 904     }
 905
 906     if (empty($logs['logs'])) {
 907         $workbook->close();
 908         return true;
 909     }
 910
 911     $formatDate =& $workbook->add_format();
 912     $formatDate->set_num_format(get_string('log_excel_date_format'));
 913
 914     $row = FIRSTUSEDEXCELROW;
 915     $wsnumber = 1;
 916     $myxls =& $worksheet[$wsnumber];
 917     foreach ($logs['logs'] as $log) {
 918         if (isset($ldcache[$log->module][$log->action])) {
 919             $ld = $ldcache[$log->module][$log->action];
 920         } else {
 921             $ld = get_record('log_display', 'module', $log->module, 'action', $log->action);
 922             $ldcache[$log->module][$log->action] = $ld;
 923         }
 924         if ($ld && !empty($log->info)) {
 925             // ugly hack to make sure fullname is shown correctly
 926             if (($ld->mtable == 'user') and ($ld->field == sql_concat('firstname', "' '" , 'lastname'))) {
 927                 $log->info = fullname(get_record($ld->mtable, 'id', $log->info), true);
 928             } else {
 929                 $log->info = get_field($ld->mtable, $ld->field, 'id', $log->info);
 930             }
 931         }
 932
 933         // Filter log->info
 934         $log->info = format_string($log->info);
 935         $log->info = strip_tags(urldecode($log->info));  // Some XSS protection
 936
 937         if ($nroPages>1) {
 938             if ($row > EXCELROWS) {
 939                 $wsnumber++;
 940                 $myxls =& $worksheet[$wsnumber];
 941                 $row = FIRSTUSEDEXCELROW;
 942             }
 943         }
 944
 945         $myxls->write_string($row, 0, $courses[$log->course]);
 946         $myxls->write_date($row, 1, $log->time);
 947         $myxls->write_string($row, 2, $log->ip);
 948         $fullname = fullname($log, has_capability('moodle/site:viewfullnames', get_context_instance(CONTEXT_COURSE, $course->id)));
 949         $myxls->write_string($row, 3, $fullname);
 950         $myxls->write_string($row, 4, $log->module.' '.$log->action);
 951         $myxls->write_string($row, 5, $log->info);
 952
 953         $row++;
 954     }
 955
 956     $workbook->close();
 957     return true;
 958 }
 959
 960
 961 function print_log_graph($course, $userid=0, $type="course.png", $date=0) {
 962     global $CFG, $USER;
 963     if (empty($CFG->gdversion)) {
 964         echo "(".get_string("gdneed").")";
 965     } else {
 966         // MDL-10818, do not display broken graph when user has no permission to view graph
 967         if (has_capability('moodle/site:viewreports', get_context_instance(CONTEXT_COURSE, $course->id)) ||
 968             ($course->showreports and $USER->id == $userid)) {
 969             echo '<img src="'.$CFG->wwwroot.'/course/report/log/graph.php?id='.$course->id.
 970                  '&amp;user='.$userid.'&amp;type='.$type.'&amp;date='.$date.'" alt="" />';
 971         }
 972     }
 973 }
 974
 975
 976 function print_overview($courses) {
 977
 978     global $CFG, $USER;
 979
 980     $htmlarray = array();
 981     if ($modules = get_records('modules')) {
 982         foreach ($modules as $mod) {
 983             if (file_exists(dirname(dirname(__FILE__)).'/mod/'.$mod->name.'/lib.php')) {
 984                 require_once(dirname(dirname(__FILE__)).'/mod/'.$mod->name.'/lib.php');
 985                 $fname = $mod->name.'_print_overview';
 986                 if (function_exists($fname)) {
 987                     $fname($courses,$htmlarray);
 988                 }
 989             }
 990         }
 991     }
 992     foreach ($courses as $course) {
 993         print_simple_box_start('center', '100%', '', 5, "coursebox");
 994         $linkcss = '';
 995         if (empty($course->visible)) {
 996             $linkcss = 'class="dimmed"';
 997         }
 998         print_heading('<a title="'. format_string($course->fullname).'" '.$linkcss.' href="'.$CFG->wwwroot.'/course/view.php?id='.$course->id.'">'. format_string($course->fullname).'</a>');
 999         if (array_key_exists($course->id,$htmlarray)) {
1000             foreach ($htmlarray[$course->id] as $modname => $html) {
1001                 echo $html;
1002             }
1003         }
1004         print_simple_box_end();
1005     }
1006 }
1007
1008
1009 function print_recent_activity($course) {
1010     // $course is an object
1011     // This function trawls through the logs looking for
1012     // anything new since the user's last login
1013
1014     global $CFG, $USER, $SESSION;
1015
1016     $context = get_context_instance(CONTEXT_COURSE, $course->id);
1017
1018     $timestart = time() - COURSE_MAX_RECENT_PERIOD;
1019
1020     if (!has_capability('moodle/legacy:guest', $context, NULL, false)) {
1021         if (!empty($USER->lastcourseaccess[$course->id])) {
1022             if ($USER->lastcourseaccess[$course->id] > $timestart) {
1023                 $timestart = $USER->lastcourseaccess[$course->id];
1024             }
1025         }
1026     }
1027
1028     echo '<div class="activitydate">';
1029     echo get_string('activitysince', '', userdate($timestart));
1030     echo '</div>';
1031     echo '<div class="activityhead">';
1032
1033     echo '<a href="'.$CFG->wwwroot.'/course/recent.php?id='.$course->id.'">'.get_string('recentactivityreport').'</a>';
1034
1035     echo "</div>\n";
1036
1037
1038     // Firstly, have there been any new enrolments?
1039
1040     $heading = false;
1041     $content = false;
1042
1043     $users = get_recent_enrolments($course->id, $timestart);
1044
1045     //Accessibility: new users now appear in an <OL> list.
1046     if ($users) {
1047         echo '<div class="newusers">';
1048         if (! $heading) {
1049             print_headline(get_string("newusers").':', 3);
1050             $heading = true;
1051             $content = true;
1052         }
1053         echo "<ol class=\"list\">\n";
1054         foreach ($users as $user) {
1055
1056             $fullname = fullname($user, has_capability('moodle/site:viewfullnames', get_context_instance(CONTEXT_COURSE, $course->id)));
1057             echo '<li class="name"><a href="'.$CFG->wwwroot."/user/view.php?id=$user->id&amp;course=$course->id\">$fullname</a></li>\n";
1058         }
1059         echo "</ol>\n</div>\n";
1060     }
1061
1062     // Next, have there been any modifications to the course structure?
1063
1064     $logs = get_records_select('log', "time > '$timestart' AND course = '$course->id' AND
1065                                        module = 'course' AND action LIKE '% mod'", "time ASC");
1066
1067     if ($logs) {
1068         foreach ($logs as $key => $log) {
1069             $info = split(' ', $log->info);
1070
1071             if ($info[0] == 'label') {     // Labels are special activities
1072                 continue;
1073             }
1074
1075             $modname = get_field($info[0], 'name', 'id', $info[1]);
1076             //Create a temp valid module structure (course,id)
1077             $tempmod->course = $log->course;
1078             $tempmod->id = $info[1];
1079             //Obtain the visible property from the instance
1080             $modvisible = instance_is_visible($info[0],$tempmod);
1081
1082             //Only if the mod is visible
1083             if ($modvisible) {
1084                 switch ($log->action) {
1085                     case 'add mod':
1086                         $stradded = get_string('added', 'moodle', get_string('modulename', $info[0]));
1087                         $changelist[$log->info] = array ('operation' => 'add', 'text' => "$stradded:<br /><a href=\"$CFG->wwwroot/course/$log->url\">".format_string($modname,true)."</a>");
1088                     break;
1089                     case 'update mod':
1090                        $strupdated = get_string('updated', 'moodle', get_string('modulename', $info[0]));
1091                        if (empty($changelist[$log->info])) {
1092                            $changelist[$log->info] = array ('operation' => 'update', 'text' => "$strupdated:<br /><a href=\"$CFG->wwwroot/course/$log->url\">".format_string($modname,true)."</a>");
1093                        }
1094                     break;
1095                     case 'delete mod':
1096                        if (!empty($changelist[$log->info]['operation']) and
1097                                   $changelist[$log->info]['operation'] == 'add') {
1098                            $changelist[$log->info] = NULL;
1099                        } else {
1100                            $strdeleted = get_string('deletedactivity', 'moodle', get_string('modulename', $info[0]));
1101                            $changelist[$log->info] = array ('operation' => 'delete', 'text' => $strdeleted);
1102                        }
1103                     break;
1104                 }
1105             }
1106         }
1107     }
1108
1109     if (!empty($changelist)) {
1110         foreach ($changelist as $changeinfo => $change) {
1111             if ($change) {
1112                 $changes[$changeinfo] = $change;
1113             }
1114         }
1115         if (isset($changes)){
1116             if (count($changes) > 0) {
1117                 print_headline(get_string('courseupdates').':', 3);
1118                 $content = true;
1119                 foreach ($changes as $changeinfo => $change) {
1120                     echo '<p class="activity">'.$change['text'].'</p>';
1121                 }
1122             }
1123         }
1124     }
1125
1126     // Now display new things from each module
1127
1128     $mods = get_records('modules', 'visible', '1', 'name', 'id, name');
1129
1130     $viewfullnames = has_capability('moodle/site:viewfullnames', $context);
1131
1132     foreach ($mods as $mod) {      // Each module gets it's own logs and prints them
1133         include_once($CFG->dirroot.'/mod/'.$mod->name.'/lib.php');
1134         $print_recent_activity = $mod->name.'_print_recent_activity';
1135         if (function_exists($print_recent_activity)) {
1136             //
1137             // NOTE:
1138             //   $isteacher (second parameter below) is to be deprecated!
1139             //
1140             // TODO:
1141             //   1) Make sure that all _print_recent_activity functions are
1142             //      not using the $isteacher value.
1143             //   2) Eventually, remove the $isteacher parameter from the
1144             //      function calls.
1145             //
1146             $modcontent = $print_recent_activity($course, $viewfullnames, $timestart);
1147             if ($modcontent) {
1148                 $content = true;
1149             }
1150         }
1151     }
1152
1153     if (! $content) {
1154         echo '<p class="message">'.get_string('nothingnew').'</p>';
1155     }
1156 }
1157
1158
1159 function get_array_of_activities($courseid) {
1160 // For a given course, returns an array of course activity objects
1161 // Each item in the array contains he following properties:
1162 //  cm - course module id
1163 //  mod - name of the module (eg forum)
1164 //  section - the number of the section (eg week or topic)
1165 //  name - the name of the instance
1166 //  visible - is the instance visible or not
1167 //  groupingid - grouping id
1168 //  groupmembersonly - is this instance visible to group members only
1169 //  extra - contains extra string to include in any link
1170
1171     global $CFG;
1172
1173     $mod = array();
1174
1175     if (!$rawmods = get_course_mods($courseid)) {
1176         return NULL;
1177     }
1178
1179     if ($sections = get_records("course_sections", "course", $courseid, "section ASC")) {
1180        foreach ($sections as $section) {
1181            if (!empty($section->sequence)) {
1182                $sequence = explode(",", $section->sequence);
1183                foreach ($sequence as $seq) {
1184                    if (empty($rawmods[$seq])) {
1185                        continue;
1186                    }
1187                    $mod[$seq]->cm = $rawmods[$seq]->id;
1188                    $mod[$seq]->mod = $rawmods[$seq]->modname;
1189                    $mod[$seq]->section = $section->section;
1190                    $mod[$seq]->name = urlencode(get_field($rawmods[$seq]->modname, "name", "id", $rawmods[$seq]->instance));
1191                    $mod[$seq]->visible = $rawmods[$seq]->visible;
1192                    $mod[$seq]->groupingid = $rawmods[$seq]->groupingid;
1193                    $mod[$seq]->groupmembersonly = $rawmods[$seq]->groupmembersonly;
1194                    $mod[$seq]->extra = "";
1195
1196                    $modname = $mod[$seq]->mod;
1197                    $functionname = $modname."_get_coursemodule_info";
1198
1199                    include_once("$CFG->dirroot/mod/$modname/lib.php");
1200
1201                    if (function_exists($functionname)) {
1202                        if ($info = $functionname($rawmods[$seq])) {
1203                            if (!empty($info->extra)) {
1204                                $mod[$seq]->extra = $info->extra;
1205                            }
1206                            if (!empty($info->icon)) {
1207                                $mod[$seq]->icon = $info->icon;
1208                            }
1209                        }
1210                    }
1211                }
1212             }
1213         }
1214     }
1215     return $mod;
1216 }
1217
1218
1219
1220
1221 function get_all_mods($courseid, &$mods, &$modnames, &$modnamesplural, &$modnamesused) {
1222 // Returns a number of useful structures for course displays
1223
1224     $mods          = NULL;    // course modules indexed by id
1225     $modnames      = NULL;    // all course module names (except resource!)
1226     $modnamesplural= NULL;    // all course module names (plural form)
1227     $modnamesused  = NULL;    // course module names used
1228
1229     if ($allmods = get_records("modules")) {
1230         foreach ($allmods as $mod) {
1231             if ($mod->visible) {
1232                 $modnames[$mod->name] = get_string("modulename", "$mod->name");
1233                 $modnamesplural[$mod->name] = get_string("modulenameplural", "$mod->name");
1234             }
1235         }
1236         asort($modnames);
1237     } else {
1238         error("No modules are installed!");
1239     }
1240
1241     if ($rawmods = get_course_mods($courseid)) {
1242         foreach($rawmods as $mod) {    // Index the mods
1243             if (empty($modnames[$mod->modname])) {
1244                 continue;
1245             }
1246             // Check groupings
1247             if (!groups_course_module_visible($mod)) {
1248                 continue;
1249             }
1250             $mods[$mod->id] = $mod;
1251             $mods[$mod->id]->modfullname = $modnames[$mod->modname];
1252             if ($mod->visible or has_capability('moodle/course:viewhiddenactivities', get_context_instance(CONTEXT_COURSE, $courseid))) {
1253                 $modnamesused[$mod->modname] = $modnames[$mod->modname];
1254             }
1255         }
1256         if ($modnamesused) {
1257             asort($modnamesused);
1258         }
1259     }
1260 }
1261
1262
1263 function get_all_sections($courseid) {
1264
1265     return get_records("course_sections", "course", "$courseid", "section",
1266                        "section, id, course, summary, sequence, visible");
1267 }
1268
1269 function course_set_display($courseid, $display=0) {
1270     global $USER;
1271
1272     if ($display == "all" or empty($display)) {
1273         $display = 0;
1274     }
1275
1276     if (empty($USER->id) or $USER->username == 'guest') {
1277         //do not store settings in db for guests
1278     } else if (record_exists("course_display", "userid", $USER->id, "course", $courseid)) {
1279         set_field("course_display", "display", $display, "userid", $USER->id, "course", $courseid);
1280     } else {
1281         $record->userid = $USER->id;
1282         $record->course = $courseid;
1283         $record->display = $display;
1284         if (!insert_record("course_display", $record)) {
1285             notify("Could not save your course display!");
1286         }
1287     }
1288
1289     return $USER->display[$courseid] = $display;  // Note: = not ==
1290 }
1291
1292 function set_section_visible($courseid, $sectionnumber, $visibility) {
1293 /// For a given course section, markes it visible or hidden,
1294 /// and does the same for every activity in that section
1295
1296     if ($section = get_record("course_sections", "course", $courseid, "section", $sectionnumber)) {
1297         set_field("course_sections", "visible", "$visibility", "id", $section->id);
1298         if (!empty($section->sequence)) {
1299             $modules = explode(",", $section->sequence);
1300             foreach ($modules as $moduleid) {
1301                 set_coursemodule_visible($moduleid, $visibility, true);
1302             }
1303         }
1304         rebuild_course_cache($courseid);
1305     }
1306 }
1307
1308
1309 function print_section($course, $section, $mods, $modnamesused, $absolute=false, $width="100%") {
1310 /// Prints a section full of activity modules
1311     global $CFG, $USER;
1312
1313     static $groupbuttons;
1314     static $groupbuttonslink;
1315     static $isteacher;
1316     static $isediting;
1317     static $ismoving;
1318     static $strmovehere;
1319     static $strmovefull;
1320     static $strunreadpostsone;
1321
1322     static $untracked;
1323     static $usetracking;
1324
1325     $labelformatoptions = New stdClass;
1326
1327     if (!isset($isteacher)) {
1328         $groupbuttons     = ($course->groupmode or (!$course->groupmodeforce));
1329         $groupbuttonslink = (!$course->groupmodeforce);
1330         $isediting = isediting($course->id);
1331         $ismoving = $isediting && ismoving($course->id);
1332         if ($ismoving) {
1333             $strmovehere = get_string("movehere");
1334             $strmovefull = strip_tags(get_string("movefull", "", "'$USER->activitycopyname'"));
1335         }
1336         include_once($CFG->dirroot.'/mod/forum/lib.php');
1337         if ($usetracking = forum_tp_can_track_forums()) {
1338             $strunreadpostsone    = get_string('unreadpostsone', 'forum');
1339             $untracked = forum_tp_get_untracked_forums($USER->id, $course->id);
1340         }
1341     }
1342     $labelformatoptions->noclean = true;
1343
1344 /// Casting $course->modinfo to string prevents one notice when the field is null
1345     $modinfo = unserialize((string)$course->modinfo);
1346
1347     //Acccessibility: replace table with list <ul>, but don't output empty list.
1348     if (!empty($section->sequence)) {
1349
1350         // Fix bug #5027, don't want style=\"width:$width\".
1351         echo "<ul class=\"section\">\n";
1352         $sectionmods = explode(",", $section->sequence);
1353
1354         foreach ($sectionmods as $modnumber) {
1355             if (empty($mods[$modnumber])) {
1356                 continue;
1357             }
1358             $mod = $mods[$modnumber];
1359
1360             if (($mod->visible or has_capability('moodle/course:viewhiddenactivities', get_context_instance(CONTEXT_COURSE, $course->id))) &&
1361                 (!$ismoving || $mod->id != $USER->activitycopy) &&
1362                 groups_course_module_visible($mod)) {
1363                 echo '<li class="activity '.$mod->modname.'" id="module-'.$modnumber.'">';  // Unique ID
1364                 if ($ismoving) {
1365                     echo '<a title="'.$strmovefull.'"'.
1366                          ' href="'.$CFG->wwwroot.'/course/mod.php?moveto='.$mod->id.'&amp;sesskey='.$USER->sesskey.'">'.
1367                          '<img class="movetarget" src="'.$CFG->pixpath.'/movehere.gif" '.
1368                          ' alt="'.$strmovehere.'" /></a><br />
1369                          ';
1370                 }
1371                 $instancename = urldecode($modinfo[$modnumber]->name);
1372                 $instancename = format_string($instancename, true,  $course->id);
1373
1374                 if (!empty($modinfo[$modnumber]->extra)) {
1375                     $extra = urldecode($modinfo[$modnumber]->extra);
1376                 } else {
1377                     $extra = "";
1378                 }
1379
1380                 if (!empty($modinfo[$modnumber]->icon)) {
1381                     $icon = "$CFG->pixpath/".urldecode($modinfo[$modnumber]->icon);
1382                 } else {
1383                     $icon = "$CFG->modpixpath/$mod->modname/icon.gif";
1384                 }
1385
1386                 if ($mod->indent) {
1387                     print_spacer(12, 20 * $mod->indent, false);
1388                 }
1389
1390                 if ($mod->modname == "label") {
1391                     if (!$mod->visible) {
1392                         echo "<span class=\"dimmed_text\">";
1393                     }
1394                     echo format_text($extra, FORMAT_HTML, $labelformatoptions);
1395                     if (!$mod->visible) {
1396                         echo "</span>";
1397                     }
1398
1399                 } else { // Normal activity
1400
1401                     if (!empty($USER->screenreader)) {
1402                         $typestring = '('.get_string('modulename',$mod->modname).') ';
1403                     } else {
1404                         $typestring = '';
1405                     }
1406
1407                     $linkcss = $mod->visible ? "" : " class=\"dimmed\" ";
1408                     echo '<img src="'.$icon.'"'.
1409                          ' class="activityicon" alt="'.$mod->modfullname.'" />'.
1410                          ' <a title="'.$mod->modfullname.'" '.$linkcss.' '.$extra.
1411                          ' href="'.$CFG->wwwroot.'/mod/'.$mod->modname.'/view.php?id='.$mod->id.'">'.
1412                          $typestring.$instancename.'</a>';
1413                 }
1414                 if ($usetracking && $mod->modname == 'forum') {
1415                     $groupmode = groups_get_course_groupmode($course, $mod);
1416                     $groupid = ($groupmode == SEPARATEGROUPS && !has_capability('moodle/course:managegroups', get_context_instance(CONTEXT_COURSE, $course->id))) ?
1417                                groups_get_course_group($course, true) : false;
1418
1419                     if (forum_tp_can_track_forums() && !isset($untracked[$mod->instance])) {
1420                         $unread = forum_tp_count_forum_unread_posts($USER->id, $mod->instance, $groupid);
1421                         if ($unread) {
1422                             echo '<span class="unread"> <a href="'.$CFG->wwwroot.'/mod/forum/view.php?id='.$mod->id.'">';
1423                             if ($unread == 1) {
1424                                 echo $strunreadpostsone;
1425                             } else {
1426                                 print_string('unreadpostsnumber', 'forum', $unread);
1427                             }
1428                             echo '</a> </span>';
1429                         }
1430                     }
1431                 }
1432
1433                 if ($isediting) {
1434                     // TODO: we must define this as mod property!
1435                     if ($groupbuttons and $mod->modname != 'label' and $mod->modname != 'resource' and $mod->modname != 'glossary') {
1436                         if (! $mod->groupmodelink = $groupbuttonslink) {
1437                             $mod->groupmode = $course->groupmode;
1438                         }
1439
1440                     } else {
1441                         $mod->groupmode = false;
1442                     }
1443                     echo '&nbsp;&nbsp;';
1444                     echo make_editing_buttons($mod, $absolute, true, $mod->indent, $section->section);
1445                 }
1446                 echo "</li>\n";
1447             }
1448         }
1449     } elseif ($ismoving) {
1450         echo "<ul class=\"section\">\n";
1451     }
1452     if ($ismoving) {
1453         echo '<li><a title="'.$strmovefull.'"'.
1454              ' href="'.$CFG->wwwroot.'/course/mod.php?movetosection='.$section->id.'&amp;sesskey='.$USER->sesskey.'">'.
1455              '<img class="movetarget" src="'.$CFG->pixpath.'/movehere.gif" '.
1456              ' alt="'.$strmovehere.'" /></a></li>
1457              ';
1458     }
1459     if (!empty($section->sequence) || $ismoving) {
1460         echo "</ul><!--class='section'-->\n\n";
1461     }
1462 }
1463
1464 /**
1465  * Prints the menus to add activities and resources.
1466  */
1467 function print_section_add_menus($course, $section, $modnames, $vertical=false, $return=false) {
1468     global $CFG;
1469
1470     // check to see if user can add menus
1471     if (!has_capability('moodle/course:manageactivities', get_context_instance(CONTEXT_COURSE, $course->id))) {
1472         return false;
1473     }
1474
1475     static $resources = false;
1476     static $activities = false;
1477
1478     if ($resources === false) {
1479         $resources = array();
1480         $activities = array();
1481
1482         foreach($modnames as $modname=>$modnamestr) {
1483             if (!course_allowed_module($course, $modname)) {
1484                 continue;
1485             }
1486
1487             require_once("$CFG->dirroot/mod/$modname/lib.php");
1488             $gettypesfunc =  $modname.'_get_types';
1489             if (function_exists($gettypesfunc)) {
1490                 $types = $gettypesfunc();
1491                 foreach($types as $type) {
1492                     if ($type->modclass == MOD_CLASS_RESOURCE) {
1493                         $resources[$type->type] = $type->typestr;
1494                     } else {
1495                         $activities[$type->type] = $type->typestr;
1496                     }
1497                 }
1498             } else {
1499                 // all mods without type are considered activity
1500                 $activities[$modname] = $modnamestr;
1501             }
1502         }
1503     }
1504
1505     $straddactivity = get_string('addactivity');
1506     $straddresource = get_string('addresource');
1507
1508     $output  = '<div class="section_add_menus">';
1509
1510     if (!$vertical) {
1511         $output .= '<div class="horizontal">';
1512     }
1513
1514     if (!empty($resources)) {
1515         $output .= popup_form("$CFG->wwwroot/course/mod.php?id=$course->id&amp;section=$section&amp;sesskey=".sesskey()."&amp;add=",
1516                               $resources, "ressection$section", "", $straddresource, 'resource/types', $straddresource, true);
1517     }
1518
1519     if (!empty($activities)) {
1520         $output .= ' ';
1521         $output .= popup_form("$CFG->wwwroot/course/mod.php?id=$course->id&amp;section=$section&amp;sesskey=".sesskey()."&amp;add=",
1522                     $activities, "section$section", "", $straddactivity, 'mods', $straddactivity, true);
1523     }
1524
1525     if (!$vertical) {
1526         $output .= '</div>';
1527     }
1528
1529     $output .= '</div>';
1530
1531     if ($return) {
1532         return $output;
1533     } else {
1534         echo $output;
1535     }
1536 }
1537
1538 function rebuild_course_cache($courseid=0) {
1539 // Rebuilds the cached list of course activities stored in the database
1540 // If a courseid is not specified, then all are rebuilt
1541
1542     if ($courseid) {
1543         $select = "id = '$courseid'";
1544     } else {
1545         $select = "";
1546         @set_time_limit(0);  // this could take a while!   MDL-10954
1547     }
1548
1549     if ($courses = get_records_select("course", $select,'','id,fullname')) {
1550         foreach ($courses as $course) {
1551             $modinfo = serialize(get_array_of_activities($course->id));
1552             if (!set_field("course", "modinfo", $modinfo, "id", $course->id)) {
1553                 notify("Could not cache module information for course '" . format_string($course->fullname) . "'!");
1554             }
1555         }
1556     }
1557 }
1558
1559
1560
1561 function make_categories_list(&$list, &$parents, $category=NULL, $path="") {
1562 /// Given an empty array, this function recursively travels the
1563 /// categories, building up a nice list for display.  It also makes
1564 /// an array that list all the parents for each category.
1565
1566     // initialize the arrays if needed
1567     if (!is_array($list)) {
1568         $list = array();
1569     }
1570     if (!is_array($parents)) {
1571         $parents = array();
1572     }
1573
1574     if ($category) {
1575         if ($path) {
1576             $path = $path.' / '.format_string($category->name);
1577         } else {
1578             $path = format_string($category->name);
1579         }
1580         $list[$category->id] = $path;
1581     } else {
1582         $category->id = 0;
1583     }
1584
1585     if ($categories = get_categories($category->id)) {   // Print all the children recursively
1586         foreach ($categories as $cat) {
1587             if (!empty($category->id)) {
1588                 if (isset($parents[$category->id])) {
1589                     $parents[$cat->id]   = $parents[$category->id];
1590                 }
1591                 $parents[$cat->id][] = $category->id;
1592             }
1593             make_categories_list($list, $parents, $cat, $path);
1594         }
1595     }
1596 }
1597
1598
1599 function print_whole_category_list($category=NULL, $displaylist=NULL, $parentslist=NULL, $depth=-1, $files = true) {
1600 /// Recursive function to print out all the categories in a nice format
1601 /// with or without courses included
1602     global $CFG;
1603
1604     if (isset($CFG->max_category_depth) && ($depth >= $CFG->max_category_depth)) {
1605         return;
1606     }
1607
1608     if (!$displaylist) {
1609         make_categories_list($displaylist, $parentslist);
1610     }
1611
1612     if ($category) {
1613         if ($category->visible or has_capability('moodle/course:update', get_context_instance(CONTEXT_SYSTEM, SITEID))) {
1614             print_category_info($category, $depth, $files);
1615         } else {
1616             return;  // Don't bother printing children of invisible categories
1617         }
1618
1619     } else {
1620         $category->id = "0";
1621     }
1622
1623     if ($categories = get_categories($category->id)) {   // Print all the children recursively
1624         $countcats = count($categories);
1625         $count = 0;
1626         $first = true;
1627         $last = false;
1628         foreach ($categories as $cat) {
1629             $count++;
1630             if ($count == $countcats) {
1631                 $last = true;
1632             }
1633             $up = $first ? false : true;
1634             $down = $last ? false : true;
1635             $first = false;
1636
1637             print_whole_category_list($cat, $displaylist, $parentslist, $depth + 1, $files);
1638         }
1639     }
1640 }
1641
1642 // this function will return $options array for choose_from_menu, with whitespace to denote nesting.
1643
1644 function make_categories_options() {
1645     make_categories_list($cats,$parents);
1646     foreach ($cats as $key => $value) {
1647         if (array_key_exists($key,$parents)) {
1648             if ($indent = count($parents[$key])) {
1649                 for ($i = 0; $i < $indent; $i++) {
1650                     $cats[$key] = '&nbsp;'.$cats[$key];
1651                 }
1652             }
1653         }
1654     }
1655     return $cats;
1656 }
1657
1658 function print_category_info($category, $depth, $files = false) {
1659 /// Prints the category info in indented fashion
1660 /// This function is only used by print_whole_category_list() above
1661
1662     global $CFG;
1663     static $strallowguests, $strrequireskey, $strsummary;
1664
1665     if (empty($strsummary)) {
1666         $strallowguests = get_string('allowguests');
1667         $strrequireskey = get_string('requireskey');
1668         $strsummary = get_string('summary');
1669     }
1670
1671     $catlinkcss = $category->visible ? '' : ' class="dimmed" ';
1672
1673     $coursecount = count_records('course') <= FRONTPAGECOURSELIMIT;
1674     if ($files and $coursecount) {
1675         $catimage = '<img src="'.$CFG->pixpath.'/i/course.gif" alt="" />';
1676     } else {
1677         $catimage = "&nbsp;";
1678     }
1679
1680     echo "\n\n".'<table class="categorylist">';
1681
1682     if ($files and $coursecount) {
1683         $courses = get_courses($category->id, 'c.sortorder ASC', 'c.id,c.sortorder,c.visible,c.fullname,c.shortname,c.password,c.summary,c.guest,c.cost,c.currency');
1684
1685         echo '<tr>';
1686
1687         if ($depth) {
1688             $indent = $depth*30;
1689             $rows = count($courses) + 1;
1690             echo '<td rowspan="'.$rows.'" valign="top" width="'.$indent.'">';
1691             print_spacer(10, $indent);
1692             echo '</td>';
1693         }
1694
1695         echo '<td valign="top" class="category image">'.$catimage.'</td>';
1696         echo '<td valign="top" class="category name">';
1697         echo '<a '.$catlinkcss.' href="'.$CFG->wwwroot.'/course/category.php?id='.$category->id.'">'. format_string($category->name).'</a>';
1698         echo '</td>';
1699         echo '<td class="category info">&nbsp;</td>';
1700         echo '</tr>';
1701
1702         if ($courses && !(isset($CFG->max_category_depth)&&($depth>=$CFG->max_category_depth-1))) {
1703             foreach ($courses as $course) {
1704                 $linkcss = $course->visible ? '' : ' class="dimmed" ';
1705                 echo '<tr><td valign="top">&nbsp;';
1706                 echo '</td><td valign="top" class="course name">';
1707                 echo '<a '.$linkcss.' href="'.$CFG->wwwroot.'/course/view.php?id='.$course->id.'">'. format_string($course->fullname).'</a>';
1708                 echo '</td><td align="right" valign="top" class="course info">';
1709                 if ($course->guest ) {
1710                     echo '<a title="'.$strallowguests.'" href="'.$CFG->wwwroot.'/course/view.php?id='.$course->id.'">';
1711                     echo '<img alt="'.$strallowguests.'" src="'.$CFG->pixpath.'/i/guest.gif" /></a>';
1712                 } else {
1713                     echo '<img alt="" style="width:18px;height:16px;" src="'.$CFG->pixpath.'/spacer.gif" />';
1714                 }
1715                 if ($course->password) {
1716                     echo '<a title="'.$strrequireskey.'" href="'.$CFG->wwwroot.'/course/view.php?id='.$course->id.'">';
1717                     echo '<img alt="'.$strrequireskey.'" src="'.$CFG->pixpath.'/i/key.gif" /></a>';
1718                 } else {
1719                     echo '<img alt="" style="width:18px;height:16px;" src="'.$CFG->pixpath.'/spacer.gif" />';
1720                 }
1721                 if ($course->summary) {
1722                     link_to_popup_window ('/course/info.php?id='.$course->id, 'courseinfo',
1723                                           '<img alt="'.$strsummary.'" src="'.$CFG->pixpath.'/i/info.gif" />',
1724                                            400, 500, $strsummary);
1725                 } else {
1726                     echo '<img alt="" style="width:18px;height:16px;" src="'.$CFG->pixpath.'/spacer.gif" />';
1727                 }
1728                 echo '</td></tr>';
1729             }
1730         }
1731     } else {
1732
1733         echo '<tr>';
1734
1735         if ($depth) {
1736             $indent = $depth*20;
1737             echo '<td valign="top" width="'.$indent.'">';
1738             print_spacer(10, $indent);
1739             echo '</td>';
1740         }
1741
1742         echo '<td valign="top" class="category name">';
1743         echo '<a '.$catlinkcss.' href="'.$CFG->wwwroot.'/course/category.php?id='.$category->id.'">'. format_string($category->name).'</a>';
1744         echo '</td>';
1745         echo '<td valign="top" class="category number">';
1746         if ($category->coursecount) {
1747             echo $category->coursecount;
1748         }
1749         echo '</td></tr>';
1750     }
1751     echo '</table>';
1752 }
1753
1754
1755 function print_courses($category) {
1756 /// Category is 0 (for all courses) or an object
1757
1758     global $CFG;
1759
1760     if (!is_object($category) && $category==0) {
1761         $categories = get_categories(0);  // Parent = 0   ie top-level categories only
1762         if (is_array($categories) && count($categories) == 1) {
1763             $category   = array_shift($categories);
1764             $courses    = get_courses_wmanagers($category->id,
1765                                                 'c.sortorder ASC',
1766                                                 array('password','summary','currency'));
1767         } else {
1768             $courses    = get_courses_wmanagers('all',
1769                                                 'c.sortorder ASC',
1770                                                 array('password','summary','currency'));
1771         }
1772         unset($categories);
1773     } else {
1774         $courses    = get_courses_wmanagers($category->id,
1775                                             'c.sortorder ASC',
1776                                             array('password','summary','currency'));
1777     }
1778
1779     if ($courses) {
1780         foreach ($courses as $course) {
1781             if ($course->visible == 1
1782                 || has_capability('moodle/course:viewhidden',$course->context)) {
1783                 print_course($course);
1784             }
1785         }
1786     } else {
1787         print_heading(get_string("nocoursesyet"));
1788         $context = get_context_instance(CONTEXT_SYSTEM, SITEID);
1789         if (has_capability('moodle/course:create', $context)) {
1790             $options = array();
1791             $options['category'] = $category->id;
1792             echo '<div class="addcoursebutton">';
1793             print_single_button($CFG->wwwroot.'/course/edit.php', $options, get_string("addnewcourse"));
1794             echo '</div>';
1795         }
1796     }
1797
1798
1799
1800 }
1801
1802
1803 function print_course($course) {
1804
1805     global $CFG, $USER;
1806
1807     if (isset($course->context)) {
1808         $context = $course->context;
1809     } else {
1810         $context = get_context_instance(CONTEXT_COURSE, $course->id);
1811     }
1812
1813     $linkcss = $course->visible ? '' : ' class="dimmed" ';
1814
1815     echo '<div class="coursebox">';
1816     echo '<div class="info">';
1817     echo '<div class="name"><a title="'.get_string('entercourse').'"'.
1818          $linkcss.' href="'.$CFG->wwwroot.'/course/view.php?id='.$course->id.'">'.
1819          format_string($course->fullname).'</a></div>';
1820
1821     /// first find all roles that are supposed to be displayed
1822
1823     if (!empty($CFG->coursemanager)) {
1824         $managerroles = split(',', $CFG->coursemanager);
1825         $canseehidden = has_capability('moodle/role:viewhiddenassigns', $context);
1826         $namesarray = array();
1827         if (isset($course->managers)) {
1828             if (count($course->managers)) {
1829                 $rusers = $course->managers;
1830                 $canviewfullnames = has_capability('moodle/site:viewfullnames', $context);
1831                 foreach ($rusers as $ra) {
1832                     if ($ra->hidden == 0 || $canseehidden) {
1833                         $fullname = fullname($ra->user, $canviewfullnames);
1834                         $namesarray[] = format_string($ra->rolename)
1835                             . ': <a href="'.$CFG->wwwroot.'/user/view.php?id='.$ra->user->id.'&amp;course='.SITEID.'">'
1836                             . $fullname . '</a>';
1837                     }
1838                 }
1839             }
1840         } else {
1841             $rusers = get_role_users($managerroles, $context,
1842                                      true, '', 'r.sortorder ASC, u.lastname ASC', $canseehidden);
1843             if (is_array($rusers) && count($rusers)) {
1844                 $canviewfullnames = has_capability('moodle/site:viewfullnames', $context);
1845                 foreach ($rusers as $teacher) {
1846                     $fullname = fullname($teacher, $canviewfullnames);
1847                     $namesarray[] = format_string($teacher->rolename)
1848                         . ': <a href="'.$CFG->wwwroot.'/user/view.php?id='.$teacher->id.'&amp;course='.SITEID.'">'
1849                         . $fullname . '</a>';
1850                 }
1851             }
1852         }
1853
1854         if (!empty($namesarray)) {
1855             echo "<ul class=\"teachers\">\n<li>";
1856             echo implode('</li><li>', $namesarray);
1857             echo "</li></ul>";
1858         }
1859     }
1860
1861     require_once("$CFG->dirroot/enrol/enrol.class.php");
1862     $enrol = enrolment_factory::factory($course->enrol);
1863     echo $enrol->get_access_icons($course);
1864
1865     echo '</div><div class="summary">';
1866     $options = NULL;
1867     $options->noclean = true;
1868     $options->para = false;
1869     echo format_text($course->summary, FORMAT_MOODLE, $options,  $course->id);
1870     echo '</div>';
1871     echo '</div>';
1872     echo '<div class="clearer"></div>';
1873 }
1874
1875
1876 function print_my_moodle() {
1877 /// Prints custom user information on the home page.
1878 /// Over time this can include all sorts of information
1879
1880     global $USER, $CFG;
1881
1882     if (empty($USER->id)) {
1883         error("It shouldn't be possible to see My Moodle without being logged in.");
1884     }
1885
1886     $courses  = get_my_courses($USER->id, 'visible DESC,sortorder ASC', array('summary'));
1887     $rhosts   = array();
1888     $rcourses = array();
1889     if (!empty($CFG->mnet_dispatcher_mode) && $CFG->mnet_dispatcher_mode==='strict') {
1890         $rcourses = get_my_remotecourses($USER->id);
1891         $rhosts   = get_my_remotehosts();
1892     }
1893
1894     if (!empty($courses) || !empty($rcourses) || !empty($rhosts)) {
1895
1896         if (!empty($courses)) {
1897             foreach ($courses as $course) {
1898                 if ($course->id == SITEID) {
1899                     continue;
1900                 }
1901                 print_course($course, "100%");
1902             }
1903         }
1904
1905         // MNET
1906         if (!empty($rcourses)) {
1907             // at the IDP, we know of all the remote courses
1908             foreach ($rcourses as $course) {
1909                 print_remote_course($course, "100%");
1910             }
1911         } elseif (!empty($rhosts)) {
1912             // non-IDP, we know of all the remote servers, but not courses
1913             foreach ($rhosts as $host) {
1914                 print_remote_host($host, "100%");
1915             }
1916         }
1917         unset($course);
1918         unset($host);
1919
1920         if (count_records("course") > (count($courses) + 1) ) {  // Some courses not being displayed
1921             echo "<table width=\"100%\"><tr><td align=\"center\">";
1922             print_course_search("", false, "short");
1923             echo "</td><td align=\"center\">";
1924             print_single_button("$CFG->wwwroot/course/index.php", NULL, get_string("fulllistofcourses"), "get");
1925             echo "</td></tr></table>\n";
1926         }
1927
1928     } else {
1929         if (count_records("course_categories") > 1) {
1930             print_simple_box_start("center", "100%", "#FFFFFF", 5, "categorybox");
1931             print_whole_category_list();
1932             print_simple_box_end();
1933         } else {
1934             print_courses(0);
1935         }
1936     }
1937 }
1938
1939
1940 function print_course_search($value="", $return=false, $format="plain") {
1941
1942     global $CFG;
1943     static $count = 0;
1944
1945     $count++;
1946
1947     $id = 'coursesearch';
1948
1949     if ($count > 1) {
1950         $id .= $count;
1951     }
1952
1953     $strsearchcourses= get_string("searchcourses");
1954
1955     if ($format == 'plain') {
1956         $output  = '<form id="'.$id.'" action="'.$CFG->wwwroot.'/course/search.php" method="get">';
1957         $output .= '<fieldset class="coursesearchbox invisiblefieldset">';
1958         $output .= '<label for="coursesearchbox">'.$strsearchcourses.': </label>';
1959         $output .= '<input type="text" id="coursesearchbox" size="30" name="search" alt="'.s($strsearchcourses).'" value="'.s($value, true).'" />';
1960         $output .= '<input type="submit" value="'.get_string('go').'" />';
1961         $output .= '</fieldset></form>';
1962     } else if ($format == 'short') {
1963         $output  = '<form id="'.$id.'" action="'.$CFG->wwwroot.'/course/search.php" method="get">';
1964         $output .= '<fieldset class="coursesearchbox invisiblefieldset">';
1965         $output .= '<label for="coursesearchbox">'.$strsearchcourses.': </label>';
1966         $output .= '<input type="text" id="coursesearchbox" size="12" name="search" alt="'.s($strsearchcourses).'" value="'.s($value, true).'" />';
1967         $output .= '<input type="submit" value="'.get_string('go').'" />';
1968         $output .= '</fieldset></form>';
1969     } else if ($format == 'navbar') {
1970         $output  = '<form id="coursesearchnavbar" action="'.$CFG->wwwroot.'/course/search.php" method="get">';
1971         $output .= '<fieldset class="coursesearchbox invisiblefieldset">';
1972         $output .= '<label for="coursesearchbox">'.$strsearchcourses.': </label>';
1973         $output .= '<input type="text" id="coursesearchbox" size="20" name="search" alt="'.s($strsearchcourses).'" value="'.s($value, true).'" />';
1974         $output .= '<input type="submit" value="'.get_string('go').'" />';
1975         $output .= '</fieldset></form>';
1976     }
1977
1978     if ($return) {
1979         return $output;
1980     }
1981     echo $output;
1982 }
1983
1984 function print_remote_course($course, $width="100%") {
1985
1986     global $CFG, $USER;
1987
1988     $linkcss = '';
1989
1990     $url = "{$CFG->wwwroot}/auth/mnet/jump.php?hostid={$course->hostid}&amp;wantsurl=/course/view.php?id={$course->remoteid}";
1991
1992     echo '<div class="coursebox remotecoursebox">';
1993     echo '<div class="info">';
1994     echo '<div class="name"><a title="'.get_string('entercourse').'"'.
1995          $linkcss.' href="'.$url.'">'
1996         .  format_string($course->fullname) .'</a><br />'
1997         . format_string($course->hostname) . ' : '
1998         . format_string($course->cat_name) . ' : '
1999         . format_string($course->shortname). '</div>';
2000     echo '</div><div class="summary">';
2001     $options = NULL;
2002     $options->noclean = true;
2003     $options->para = false;
2004     echo format_text($course->summary, FORMAT_MOODLE, $options);
2005     echo '</div>';
2006     echo '</div>';
2007     echo '<div class="clearer"></div>';
2008 }
2009
2010 function print_remote_host($host, $width="100%") {
2011
2012     global $CFG, $USER;
2013
2014     $linkcss = '';
2015
2016     echo '<div class="coursebox">';
2017     echo '<div class="info">';
2018     echo '<div class="name">';
2019     echo '<img src="'.$CFG->pixpath.'/i/mnethost.gif" class="icon" alt="'.get_string('course').'" />';
2020     echo '<a title="'.s($host['name']).'" href="'.s($host['url']).'">'
2021         . s($host['name']).'</a> - ';
2022     echo $host['count'] . ' ' . get_string('courses');
2023     echo '</div>';
2024     echo '</div>';
2025     echo '</div>';
2026     echo '<div class="clearer"></div>';
2027 }
2028
2029
2030 /// MODULE FUNCTIONS /////////////////////////////////////////////////////////////////
2031
2032 function add_course_module($mod) {
2033
2034     $mod->added = time();
2035     unset($mod->id);
2036
2037     return insert_record("course_modules", $mod);
2038 }
2039
2040 /**
2041  * Returns course section - creates new if does not exist yet.
2042  * @param int $relative section number
2043  * @param int $courseid
2044  * @return object $course_section object
2045  */
2046 function get_course_section($section, $courseid) {
2047     if ($cw = get_record("course_sections", "section", $section, "course", $courseid)) {
2048         return $cw;
2049     }
2050     $cw = new object();
2051     $cw->course = $courseid;
2052     $cw->section = $section;
2053     $cw->summary = "";
2054     $cw->sequence = "";
2055     $id = insert_record("course_sections", $cw);
2056     return get_record("course_sections", "id", $id);
2057 }
2058
2059 function add_mod_to_section($mod, $beforemod=NULL) {
2060 /// Given a full mod object with section and course already defined
2061 /// If $before is specified, then this is an existing ID which we
2062 /// will insert the new module before
2063 ///
2064 /// Returns the course_sections ID where the mod is inserted
2065
2066     if ($section = get_record("course_sections", "course", "$mod->course", "section", "$mod->section")) {
2067
2068         $section->sequence = trim($section->sequence);
2069
2070         if (empty($section->sequence)) {
2071             $newsequence = "$mod->coursemodule";
2072
2073         } else if ($beforemod) {
2074             $modarray = explode(",", $section->sequence);
2075
2076             if ($key = array_keys ($modarray, $beforemod->id)) {
2077                 $insertarray = array($mod->id, $beforemod->id);
2078                 array_splice($modarray, $key[0], 1, $insertarray);
2079                 $newsequence = implode(",", $modarray);
2080
2081             } else {  // Just tack it on the end anyway
2082                 $newsequence = "$section->sequence,$mod->coursemodule";
2083             }
2084
2085         } else {
2086             $newsequence = "$section->sequence,$mod->coursemodule";
2087         }
2088
2089         if (set_field("course_sections", "sequence", $newsequence, "id", $section->id)) {
2090             return $section->id;     // Return course_sections ID that was used.
2091         } else {
2092             return 0;
2093         }
2094
2095     } else {  // Insert a new record
2096         $section->course = $mod->course;
2097         $section->section = $mod->section;
2098         $section->summary = "";
2099         $section->sequence = $mod->coursemodule;
2100         return insert_record("course_sections", $section);
2101     }
2102 }
2103
2104 function set_coursemodule_groupmode($id, $groupmode) {
2105     return set_field("course_modules", "groupmode", $groupmode, "id", $id);
2106 }
2107
2108 function set_coursemodule_groupingid($id, $groupingid) {
2109     return set_field("course_modules", "groupingid", $groupingid, "id", $id);
2110 }
2111
2112 function set_coursemodule_groupmembersonly($id, $groupmembersonly) {
2113     return set_field("course_modules", "groupmembersonly", $groupmembersonly, "id", $id);
2114 }
2115
2116 function set_coursemodule_idnumber($id, $idnumber) {
2117     return set_field("course_modules", "idnumber", $idnumber, "id", $id);
2118 }
2119 /**
2120 * $prevstateoverrides = true will set the visibility of the course module
2121 * to what is defined in visibleold. This enables us to remember the current
2122 * visibility when making a whole section hidden, so that when we toggle
2123 * that section back to visible, we are able to return the visibility of
2124 * the course module back to what it was originally.
2125 */
2126 function set_coursemodule_visible($id, $visible, $prevstateoverrides=false) {
2127     if (!$cm = get_record('course_modules', 'id', $id)) {
2128         return false;
2129     }
2130     if (!$modulename = get_field('modules', 'name', 'id', $cm->module)) {
2131         return false;
2132     }
2133     if ($events = get_records_select('event', "instance = '$cm->instance' AND modulename = '$modulename'")) {
2134         foreach($events as $event) {
2135             if ($visible) {
2136                 show_event($event);
2137             } else {
2138                 hide_event($event);
2139             }
2140         }
2141     }
2142     if ($prevstateoverrides) {
2143         if ($visible == '0') {
2144             // Remember the current visible state so we can toggle this back.
2145             set_field('course_modules', 'visibleold', $cm->visible, 'id', $id);
2146         } else {
2147             // Get the previous saved visible states.
2148             return set_field('course_modules', 'visible', $cm->visibleold, 'id', $id);
2149         }
2150     }
2151     return set_field("course_modules", "visible", $visible, "id", $id);
2152 }
2153
2154 /*
2155  * Delete a course module and any associated data at the course level (events)
2156  * Until 1.5 this function simply marked a deleted flag ... now it
2157  * deletes it completely.
2158  *
2159  */
2160 function delete_course_module($id) {
2161     global $CFG;
2162     require_once($CFG->libdir.'/gradelib.php');
2163
2164     if (!$cm = get_record('course_modules', 'id', $id)) {
2165         return true;
2166     }
2167     $modulename = get_field('modules', 'name', 'id', $cm->module);
2168     //delete events from calendar
2169     if ($events = get_records_select('event', "instance = '$cm->instance' AND modulename = '$modulename'")) {
2170         foreach($events as $event) {
2171             delete_event($event->id);
2172         }
2173     }
2174     //delete grade items, outcome items and grades attached to modules
2175     if ($grade_items = grade_item::fetch_all(array('itemtype'=>'mod', 'itemmodule'=>$modulename,
2176                                                    'iteminstance'=>$cm->instance, 'courseid'=>$cm->course))) {
2177         foreach ($grade_items as $grade_item) {
2178             $grade_item->delete('moddelete');
2179         }
2180
2181     }
2182     return delete_records('course_modules', 'id', $cm->id);
2183 }
2184
2185 function delete_mod_from_section($mod, $section) {
2186
2187     if ($section = get_record("course_sections", "id", "$section") ) {
2188
2189         $modarray = explode(",", $section->sequence);
2190
2191         if ($key = array_keys ($modarray, $mod)) {
2192             array_splice($modarray, $key[0], 1);
2193             $newsequence = implode(",", $modarray);
2194             return set_field("course_sections", "sequence", $newsequence, "id", $section->id);
2195         } else {
2196             return false;
2197         }
2198
2199     }
2200     return false;
2201 }
2202
2203 function move_section($course, $section, $move) {
2204 /// Moves a whole course section up and down within the course
2205     global $USER;
2206
2207     if (!$move) {
2208         return true;
2209     }
2210
2211     $sectiondest = $section + $move;
2212
2213     if ($sectiondest > $course->numsections or $sectiondest < 1) {
2214         return false;
2215     }
2216
2217     if (!$sectionrecord = get_record("course_sections", "course", $course->id, "section", $section)) {
2218         return false;
2219     }
2220
2221     if (!$sectiondestrecord = get_record("course_sections", "course", $course->id, "section", $sectiondest)) {
2222         return false;
2223     }
2224
2225     if (!set_field("course_sections", "section", $sectiondest, "id", $sectionrecord->id)) {
2226         return false;
2227     }
2228     if (!set_field("course_sections", "section", $section, "id", $sectiondestrecord->id)) {
2229         return false;
2230     }
2231     // if the focus is on the section that is being moved, then move the focus along
2232     if (isset($USER->display[$course->id]) and ($USER->display[$course->id] == $section)) {
2233         course_set_display($course->id, $sectiondest);
2234     }
2235
2236     // Check for duplicates and fix order if needed.
2237     // There is a very rare case that some sections in the same course have the same section id.
2238     $sections = get_records_select('course_sections', "course = $course->id", 'section ASC');
2239     $n = 0;
2240     foreach ($sections as $section) {
2241         if ($section->section != $n) {
2242             if (!set_field('course_sections', 'section', $n, 'id', $section->id)) {
2243                 return false;
2244             }
2245         }
2246         $n++;
2247     }
2248     return true;
2249 }
2250
2251
2252 function moveto_module($mod, $section, $beforemod=NULL) {
2253 /// All parameters are objects
2254 /// Move the module object $mod to the specified $section
2255 /// If $beforemod exists then that is the module
2256 /// before which $modid should be inserted
2257
2258 /// Remove original module from original section
2259
2260     if (! delete_mod_from_section($mod->id, $mod->section)) {
2261         notify("Could not delete module from existing section");
2262     }
2263
2264 /// Update module itself if necessary
2265
2266     if ($mod->section != $section->id) {
2267         $mod->section = $section->id;
2268         if (!update_record("course_modules", $mod)) {
2269             return false;
2270         }
2271         // if moving to a hidden section then hide module
2272         if (!$section->visible) {
2273             set_coursemodule_visible($mod->id, 0);
2274         }
2275     }
2276
2277 /// Add the module into the new section
2278
2279     $mod->course       = $section->course;
2280     $mod->section      = $section->section;  // need relative reference
2281     $mod->coursemodule = $mod->id;
2282
2283     if (! add_mod_to_section($mod, $beforemod)) {
2284         return false;
2285     }
2286
2287     return true;
2288
2289 }
2290
2291 function make_editing_buttons($mod, $absolute=false, $moveselect=true, $indent=-1, $section=-1) {
2292     global $CFG, $USER;
2293
2294     static $str;
2295     static $sesskey;
2296
2297     $modcontext = get_context_instance(CONTEXT_MODULE, $mod->id);
2298     // no permission to edit
2299     if (!has_capability('moodle/course:manageactivities', $modcontext)) {
2300         return false;
2301     }
2302
2303     if (!isset($str)) {
2304         $str->delete         = get_string("delete");
2305         $str->move           = get_string("move");
2306         $str->moveup         = get_string("moveup");
2307         $str->movedown       = get_string("movedown");
2308         $str->moveright      = get_string("moveright");
2309         $str->moveleft       = get_string("moveleft");
2310         $str->update         = get_string("update");
2311         $str->duplicate      = get_string("duplicate");
2312         $str->hide           = get_string("hide");
2313         $str->show           = get_string("show");
2314         $str->clicktochange  = get_string("clicktochange");
2315         $str->forcedmode     = get_string("forcedmode");
2316         $str->groupsnone     = get_string("groupsnone");
2317         $str->groupsseparate = get_string("groupsseparate");
2318         $str->groupsvisible  = get_string("groupsvisible");
2319         $sesskey = sesskey();
2320     }
2321
2322     if ($section >= 0) {
2323         $section = '&amp;sr='.$section;   // Section return
2324     } else {
2325         $section = '';
2326     }
2327
2328     if ($absolute) {
2329         $path = $CFG->wwwroot.'/course';
2330     } else {
2331         $path = '.';
2332     }
2333
2334     if (has_capability('moodle/course:activityvisibility', $modcontext)) {
2335         if ($mod->visible) {
2336             $hideshow = '<a class="editing_hide" title="'.$str->hide.'" href="'.$path.'/mod.php?hide='.$mod->id.
2337                         '&amp;sesskey='.$sesskey.$section.'"><img'.
2338                         ' src="'.$CFG->pixpath.'/t/hide.gif" class="iconsmall" '.
2339                         ' alt="'.$str->hide.'" /></a>'."\n";
2340         } else {
2341             $hideshow = '<a class="editing_show" title="'.$str->show.'" href="'.$path.'/mod.php?show='.$mod->id.
2342                         '&amp;sesskey='.$sesskey.$section.'"><img'.
2343                         ' src="'.$CFG->pixpath.'/t/show.gif" class="iconsmall" '.
2344                         ' alt="'.$str->show.'" /></a>'."\n";
2345         }
2346     }
2347     if ($mod->groupmode !== false) {
2348         if ($mod->groupmode == SEPARATEGROUPS) {
2349             $grouptitle = $str->groupsseparate;
2350             $groupclass = 'editing_groupsseparate';
2351             $groupimage = $CFG->pixpath.'/t/groups.gif';
2352             $grouplink  = $path.'/mod.php?id='.$mod->id.'&amp;groupmode=0&amp;sesskey='.$sesskey;
2353         } else if ($mod->groupmode == VISIBLEGROUPS) {
2354             $grouptitle = $str->groupsvisible;
2355             $groupclass = 'editing_groupsvisible';
2356             $groupimage = $CFG->pixpath.'/t/groupv.gif';
2357             $grouplink  = $path.'/mod.php?id='.$mod->id.'&amp;groupmode=1&amp;sesskey='.$sesskey;
2358         } else {
2359             $grouptitle = $str->groupsnone;
2360             $groupclass = 'editing_groupsnone';
2361             $groupimage = $CFG->pixpath.'/t/groupn.gif';
2362             $grouplink  = $path.'/mod.php?id='.$mod->id.'&amp;groupmode=2&amp;sesskey='.$sesskey;
2363         }
2364         if ($mod->groupmodelink) {
2365             $groupmode = '<a class="'.$groupclass.'" title="'.$grouptitle.' ('.$str->clicktochange.')" href="'.$grouplink.'">'.
2366                          '<img src="'.$groupimage.'" class="iconsmall" '.
2367                          'alt="'.$grouptitle.'" /></a>';
2368         } else {
2369             $groupmode = '<img title="'.$grouptitle.' ('.$str->forcedmode.')" '.
2370                          ' src="'.$groupimage.'" class="iconsmall" '.
2371                          'alt="'.$grouptitle.'" />';
2372         }
2373     } else {
2374         $groupmode = "";
2375     }
2376
2377     if (has_capability('moodle/course:update', get_context_instance(CONTEXT_COURSE, $mod->course))) {
2378         if ($moveselect) {
2379             $move =     '<a class="editing_move" title="'.$str->move.'" href="'.$path.'/mod.php?copy='.$mod->id.
2380                         '&amp;sesskey='.$sesskey.$section.'"><img'.
2381                         ' src="'.$CFG->pixpath.'/t/move.gif" class="iconsmall" '.
2382                         ' alt="'.$str->move.'" /></a>'."\n";
2383         } else {
2384             $move =     '<a class="editing_moveup" title="'.$str->moveup.'" href="'.$path.'/mod.php?id='.$mod->id.
2385                         '&amp;move=-1&amp;sesskey='.$sesskey.$section.'"><img'.
2386                         ' src="'.$CFG->pixpath.'/t/up.gif" class="iconsmall" '.
2387                         ' alt="'.$str->moveup.'" /></a>'."\n".
2388                         '<a class="editing_movedown" title="'.$str->movedown.'" href="'.$path.'/mod.php?id='.$mod->id.
2389                         '&amp;move=1&amp;sesskey='.$sesskey.$section.'"><img'.
2390                         ' src="'.$CFG->pixpath.'/t/down.gif" class="iconsmall" '.
2391                         ' alt="'.$str->movedown.'" /></a>'."\n";
2392         }
2393     } else {
2394         $move = '';
2395     }
2396
2397     $leftright = '';
2398     if (has_capability('moodle/course:update', get_context_instance(CONTEXT_COURSE, $mod->course))) {
2399
2400             if (right_to_left()) {   // Exchange arrows on RTL
2401                     $rightarrow = 'left.gif';
2402                     $leftarrow  = 'right.gif';
2403             } else {
2404                 $rightarrow = 'right.gif';
2405                 $leftarrow  = 'left.gif';
2406         }
2407
2408         if ($indent > 0) {
2409             $leftright .= '<a class="editing_moveleft" title="'.$str->moveleft.'" href="'.$path.'/mod.php?id='.$mod->id.
2410                         '&amp;indent=-1&amp;sesskey='.$sesskey.$section.'"><img'.
2411                         ' src="'.$CFG->pixpath.'/t/'.$leftarrow.'" class="iconsmall" '.
2412                         ' alt="'.$str->moveleft.'" /></a>'."\n";
2413         }
2414         if ($indent >= 0) {
2415             $leftright .= '<a class="editing_moveright" title="'.$str->moveright.'" href="'.$path.'/mod.php?id='.$mod->id.
2416                         '&amp;indent=1&amp;sesskey='.$sesskey.$section.'"><img'.
2417                         ' src="'.$CFG->pixpath.'/t/'.$rightarrow.'" class="iconsmall" '.
2418                         ' alt="'.$str->moveright.'" /></a>'."\n";
2419         }
2420     }
2421
2422     return '<span class="commands">'."\n".$leftright.$move.
2423            '<a class="editing_update" title="'.$str->update.'" href="'.$path.'/mod.php?update='.$mod->id.
2424            '&amp;sesskey='.$sesskey.$section.'"><img'.
2425            ' src="'.$CFG->pixpath.'/t/edit.gif" class="iconsmall" '.
2426            ' alt="'.$str->update.'" /></a>'."\n".
2427            '<a class="editing_delete" title="'.$str->delete.'" href="'.$path.'/mod.php?delete='.$mod->id.
2428            '&amp;sesskey='.$sesskey.$section.'"><img'.
2429            ' src="'.$CFG->pixpath.'/t/delete.gif" class="iconsmall" '.
2430            ' alt="'.$str->delete.'" /></a>'."\n".$hideshow.$groupmode."\n".'</span>';
2431 }
2432
2433 /**
2434  * given a course object with shortname & fullname, this function will
2435  * truncate the the number of chars allowed and add ... if it was too long
2436  */
2437 function course_format_name ($course,$max=100) {
2438
2439     $str = $course->shortname.': '. $course->fullname;
2440     if (strlen($str) <= $max) {
2441         return $str;
2442     }
2443     else {
2444         return substr($str,0,$max-3).'...';
2445     }
2446 }
2447
2448 /**
2449  * This function will return true if the given course is a child course at all
2450  */
2451 function course_in_meta ($course) {
2452     return record_exists("course_meta","child_course",$course->id);
2453 }
2454
2455
2456 /**
2457  * Print standard form elements on module setup forms in mod/.../mod.html
2458  */
2459 function print_standard_coursemodule_settings($form, $features=null) {
2460     if (! $course = get_record('course', 'id', $form->course)) {
2461         error("This course doesn't exist");
2462     }
2463     print_groupmode_setting($form, $course);
2464     if (!empty($features->groupings)) {
2465         print_grouping_settings($form, $course);
2466     }
2467     print_visible_setting($form, $course);
2468 }
2469
2470 /**
2471  * Print groupmode form element on module setup forms in mod/.../mod.html
2472  */
2473 function print_groupmode_setting($form, $course=NULL) {
2474
2475     if (empty($course)) {
2476         if (! $course = get_record('course', 'id', $form->course)) {
2477             error("This course doesn't exist");
2478         }
2479     }
2480     if ($form->coursemodule) {
2481         if (! $cm = get_record('course_modules', 'id', $form->coursemodule)) {
2482             error("This course module doesn't exist");
2483         }
2484         $groupmode = groups_get_activity_groupmode($cm);
2485     } else {
2486         $cm = null;
2487         $groupmode = groups_get_course_groupmode($course);
2488     }
2489     if ($course->groupmode or (!$course->groupmodeforce)) {
2490         echo '<tr valign="top">';
2491         echo '<td align="right"><b>'.get_string('groupmode').':</b></td>';
2492         echo '<td align="left">';
2493         $choices = array();
2494         $choices[NOGROUPS] = get_string('groupsnone');
2495         $choices[SEPARATEGROUPS] = get_string('groupsseparate');
2496         $choices[VISIBLEGROUPS] = get_string('groupsvisible');
2497         choose_from_menu($choices, 'groupmode', $groupmode, '', '', 0, false, $course->groupmodeforce);
2498         helpbutton('groupmode', get_string('groupmode'));
2499         echo '</td></tr>';
2500     }
2501 }
2502
2503 /**
2504  * Print groupmode form element on module setup forms in mod/.../mod.html
2505  */
2506 function print_grouping_settings($form, $course=NULL) {
2507
2508     if (empty($course)) {
2509         if (! $course = get_record('course', 'id', $form->course)) {
2510             error("This course doesn't exist");
2511         }
2512     }
2513     if ($form->coursemodule) {
2514         if (! $cm = get_record('course_modules', 'id', $form->coursemodule)) {
2515             error("This course module doesn't exist");
2516         }
2517     } else {
2518         $cm = null;
2519     }
2520
2521     $groupings = get_records_menu('groupings', 'courseid', $course->id, 'name', 'id, name');
2522     if (!empty($groupings)) {
2523         echo '<tr valign="top">';
2524         echo '<td align="right"><b>'.get_string('grouping', 'group').':</b></td>';
2525         echo '<td align="left">';
2526
2527         $groupings;
2528         $groupingid = isset($cm->groupingid) ? $cm->groupingid : 0;
2529
2530         choose_from_menu($groupings, 'groupingid', $groupingid, get_string('none'), '', 0, false);
2531         echo '</td></tr>';
2532
2533         $checked = empty($cm->groupmembersonly) ? '':'checked="checked"';
2534         echo '<tr valign="top">';
2535         echo '<td align="right"><b>'.get_string('groupmembersonly', 'group').':</b></td>';
2536         echo '<td align="left">';
2537         echo "<input type=\"checkbox\" name=\"groupmembersonly\" value=\"1\" $checked />";
2538         echo '</td></tr>';
2539
2540     }
2541 }
2542
2543 /**
2544  * Print visibility setting form element on module setup forms in mod/.../mod.html
2545  */
2546 function print_visible_setting($form, $course=NULL) {
2547     if (empty($course)) {
2548         if (! $course = get_record('course', 'id', $form->course)) {
2549             error("This course doesn't exist");
2550         }
2551     }
2552     if ($form->coursemodule) {
2553         $visible = get_field('course_modules', 'visible', 'id', $form->coursemodule);
2554     } else {
2555         $visible = true;
2556     }
2557
2558     if ($form->mode == 'add') { // in this case $form->section is the section number, not the id
2559         $hiddensection = !get_field('course_sections', 'visible', 'section', $form->section, 'course', $form->course);
2560     } else {
2561         $hiddensection = !get_field('course_sections', 'visible', 'id', $form->section);
2562     }
2563     if ($hiddensection) {
2564         $visible = false;
2565     }
2566
2567     echo '<tr valign="top">';
2568     echo '<td align="right"><b>'.get_string('visible', '').':</b></td>';
2569     echo '<td align="left">';
2570     unset($choices);
2571     $choices[1] = get_string('show');
2572     $choices[0] = get_string('hide');
2573     choose_from_menu($choices, 'visible', $visible, '', '', 0, false, $hiddensection);
2574     echo '</td></tr>';
2575 }
2576
2577 function update_restricted_mods($course,$mods) {
2578     delete_records("course_allowed_modules","course",$course->id);
2579     if (empty($course->restrictmodules)) {
2580         return;
2581     }
2582     else {
2583         foreach ($mods as $mod) {
2584             if ($mod == 0)
2585                 continue; // this is the 'allow none' option
2586             $am->course = $course->id;
2587             $am->module = $mod;
2588             insert_record("course_allowed_modules",$am);
2589         }
2590     }
2591 }
2592
2593 /**
2594  * This function will take an int (module id) or a string (module name)
2595  * and return true or false, whether it's allowed in the given course (object)
2596  * $mod is not allowed to be an object, as the field for the module id is inconsistent
2597  * depending on where in the code it's called from (sometimes $mod->id, sometimes $mod->module)
2598  */
2599
2600 function course_allowed_module($course,$mod) {
2601     if (empty($course->restrictmodules)) {
2602         return true;
2603     }
2604
2605     // i am not sure this capability is correct
2606     if (has_capability('moodle/course:update', get_context_instance(CONTEXT_SYSTEM, SITEID))) {
2607         return true;
2608     }
2609     if (is_numeric($mod)) {
2610         $modid = $mod;
2611     } else if (is_string($mod)) {
2612         if ($mod = get_field("modules","id","name",$mod))
2613             $modid = $mod;
2614     }
2615     if (empty($modid)) {
2616         return false;
2617     }
2618     return (record_exists("course_allowed_modules","course",$course->id,"module",$modid));
2619 }
2620
2621 /***
2622  *** Efficiently moves many courses around while maintaining
2623  *** sortorder in order.
2624  ***
2625  *** $courseids is an array of course ids
2626  ***
2627  **/
2628
2629 function move_courses ($courseids, $categoryid) {
2630
2631     global $CFG;
2632
2633     if (!empty($courseids)) {
2634
2635             $courseids = array_reverse($courseids);
2636
2637             foreach ($courseids as $courseid) {
2638
2639                 if (! $course  = get_record("course", "id", $courseid)) {
2640                     notify("Error finding course $courseid");
2641                 } else {
2642                     // figure out a sortorder that we can use in the destination category
2643                     $sortorder = get_field_sql('SELECT MIN(sortorder)-1 AS min
2644                                                     FROM ' . $CFG->prefix . 'course WHERE category=' . $categoryid);
2645                     if ($sortorder === false) {
2646                         // the category is empty
2647                         // rather than let the db default to 0
2648                         // set it to > 100 and avoid extra work in fix_coursesortorder()
2649                         $sortorder = 200;
2650                     } else if ($sortorder < 10) {
2651                         fix_course_sortorder($categoryid);
2652                     }
2653
2654                     $course->category  = $categoryid;
2655                     $course->sortorder = $sortorder;
2656                     $course->fullname = addslashes($course->fullname);
2657                     $course->shortname = addslashes($course->shortname);
2658                     $course->summary = addslashes($course->summary);
2659                     $course->password = addslashes($course->password);
2660                     $course->teacher = addslashes($course->teacher);
2661                     $course->teachers = addslashes($course->teachers);
2662                     $course->student = addslashes($course->student);
2663                     $course->students = addslashes($course->students);
2664
2665                     if (!update_record('course', $course)) {
2666                         notify("An error occurred - course not moved!");
2667                     }
2668
2669                     $context   = get_context_instance(CONTEXT_COURSE, $course->id);
2670                     $newparent = get_context_instance(CONTEXT_COURSECAT, $course->category);
2671                     context_moved($context, $newparent);
2672                 }
2673             }
2674             fix_course_sortorder();
2675         }
2676     return true;
2677 }
2678
2679 /***
2680  *** Efficiently moves a category - NOTE that this can have
2681  *** a huge impact access-control-wise...
2682  ***
2683  ***
2684  **/
2685 function move_category ($category, $newparentcat) {
2686
2687     global $CFG;
2688
2689     if (!set_field('course_categories', 'parent', $newparentcat->id, 'id', $category->id)) {
2690         return false;
2691     }
2692
2693     $context   = get_context_instance(CONTEXT_COURSECAT, $category->id);
2694     $newparent = get_context_instance(CONTEXT_COURSECAT, $newparentcat->id);
2695     context_moved($context, $newparent);
2696
2697     // The most effective thing would be to find the common parent,
2698     // until then, do it sitewide...
2699     fix_course_sortorder();
2700
2701
2702     return true;
2703 }
2704
2705 /**
2706  * @param string $format Course format ID e.g. 'weeks'
2707  * @return Name that the course format prefers for sections
2708  */
2709 function get_section_name($format) {
2710     $sectionname = get_string("name$format","format_$format");
2711     if($sectionname == "[[name$format]]") {
2712         $sectionname = get_string("name$format");
2713     }
2714     return $sectionname;
2715 }
2716
2717 /**
2718  * Can the current user delete this course?
2719  * @param int $courseid
2720  * @return boolean
2721  *
2722  * Exception here to fix MDL-7796.
2723  *
2724  * FIXME
2725  *   Course creators who can manage activities in the course
2726  *   shoule be allowed to delete the course. We do it this
2727  *   way because we need a quick fix to bring the functionality
2728  *   in line with what we had pre-roles. We can't give the
2729  *   default course creator role moodle/course:delete at
2730  *   CONTEXT_SYSTEM level because this will allow them to
2731  *   delete any course in the site. So we hard code this here
2732  *   for now.
2733  *
2734  * @author vyshane AT gmail.com
2735  */
2736 function can_delete_course($courseid) {
2737
2738     $context = get_context_instance(CONTEXT_COURSE, $courseid);
2739
2740     return ( has_capability('moodle/course:delete', $context)
2741              || (has_capability('moodle/legacy:coursecreator', $context)
2742              && has_capability('moodle/course:manageactivities', $context)) );
2743 }
2744
2745
2746 /*
2747  * Create a course and either return a $course object or false
2748  *
2749  * @param object $data  - all the data needed for an entry in the 'course' table
2750  */
2751 function create_course($data) {
2752     global $CFG, $USER;
2753
2754     // preprocess allowed mods
2755     $allowedmods = empty($data->allowedmods) ? array() : $data->allowedmods;
2756     unset($data->allowedmods);
2757     if (!has_capability('moodle/site:config', get_context_instance(CONTEXT_SYSTEM))) {
2758         if ($CFG->restrictmodulesfor == 'all') {
2759             $data->restrictmodules = 1;
2760         } else {
2761             $data->restrictmodules = 0;
2762         }
2763     }
2764
2765     $data->timecreated = time();
2766
2767     // place at beginning of category
2768     fix_course_sortorder();
2769     $data->sortorder = get_field_sql("SELECT min(sortorder)-1 FROM {$CFG->prefix}course WHERE category=$data->category");
2770     if (empty($data->sortorder)) {
2771         $data->sortorder = 100;
2772     }
2773
2774     if ($newcourseid = insert_record('course', $data)) {  // Set up new course
2775
2776         $course = get_record('course', 'id', $newcourseid);
2777
2778         // Setup the blocks
2779         $page = page_create_object(PAGE_COURSE_VIEW, $course->id);
2780         blocks_repopulate_page($page); // Return value not checked because you can always edit later
2781
2782         if (has_capability('moodle/site:config', get_context_instance(CONTEXT_SYSTEM))) {
2783             update_restricted_mods($course, $allowedmods);
2784         }
2785
2786         $section = new object();
2787         $section->course = $course->id;   // Create a default section.
2788         $section->section = 0;
2789         $section->id = insert_record('course_sections', $section);
2790
2791         fix_course_sortorder();
2792
2793         add_to_log(SITEID, 'course', 'new', 'view.php?id='.$course->id, $data->fullname.' (ID '.$course->id.')');
2794
2795         return $course;
2796     }
2797
2798     return false;   // error
2799 }
2800
2801
2802 /*
2803  * Update a course and return true or false
2804  *
2805  * @param object $data  - all the data needed for an entry in the 'course' table
2806  */
2807 function update_course($data) {
2808     global $USER, $CFG;
2809
2810     // preprocess allowed mods
2811     $allowedmods = empty($data->allowedmods) ? array() : $data->allowedmods;
2812     unset($data->allowedmods);
2813     if (!has_capability('moodle/site:config', get_context_instance(CONTEXT_SYSTEM))) {
2814         unset($data->restrictmodules);
2815     }
2816
2817     $movecat = false;
2818     $oldcourse = get_record('course', 'id', $data->id); // should not fail, already tested above
2819     if (!has_capability('moodle/course:create', get_context_instance(CONTEXT_COURSECAT, $oldcourse->category))
2820       or !has_capability('moodle/course:create', get_context_instance(CONTEXT_COURSECAT, $data->category))) {
2821         // can not move to new category, keep the old one
2822         unset($data->category);
2823     } elseif ($oldcourse->category != $data->category) {
2824         $movecat = true;
2825     }
2826
2827     // Update with the new data
2828     if (update_record('course', $data)) {
2829
2830         $course = get_record('course', 'id', $data->id);
2831
2832         add_to_log($course->id, "course", "update", "edit.php?id=$course->id", $course->id);
2833
2834         if (has_capability('moodle/site:config', get_context_instance(CONTEXT_SYSTEM))) {
2835             update_restricted_mods($course, $allowedmods);
2836         }
2837
2838         if ($movecat) {
2839             $context   = get_context_instance(CONTEXT_COURSE, $course->id);
2840             $newparent = get_context_instance(CONTEXT_COURSECAT, $course->category);
2841             context_moved($context, $newparent);
2842         }
2843
2844         fix_course_sortorder();
2845
2846         // Test for and remove blocks which aren't appropriate anymore
2847         $page = page_create_object(PAGE_COURSE_VIEW, $course->id);
2848         blocks_remove_inappropriate($page);
2849
2850         // put custom role names into db
2851         $context = get_context_instance(CONTEXT_COURSE, $course->id);
2852
2853         foreach ($data as $dname => $dvalue) {
2854
2855             // is this the right param?
2856             $dvalue = clean_param($dvalue, PARAM_NOTAGS);
2857
2858             if (!strstr($dname, 'role_')) {
2859                 continue;
2860             }
2861
2862             $dt = explode('_', $dname);
2863             $roleid = $dt[1];
2864             // make up our mind whether we want to delete, update or insert
2865
2866             if (empty($dvalue)) {
2867
2868                 delete_records('role_names', 'contextid', $context->id, 'roleid', $roleid);
2869
2870             } else if ($t = get_record('role_names', 'contextid', $context->id, 'roleid', $roleid)) {
2871
2872                 $t->text = $dvalue;
2873                 update_record('role_names', $t);
2874
2875             } else {
2876
2877                 $t->contextid = $context->id;
2878                 $t->roleid = $roleid;
2879                 $t->text = $dvalue;
2880                 insert_record('role_names', $t);
2881             }
2882
2883         }
2884
2885         return true;
2886
2887     }
2888
2889     return false;
2890 }
2891
2892 ?>