user/index.php

   1 <?php
   2
   3 //  Lists all the users within a given course
   4
   5     require_once('../config.php');
   6     require_once($CFG->libdir.'/tablelib.php');
   7     require_once($CFG->libdir.'/filelib.php');
   8
   9     define('USER_SMALL_CLASS', 20);   // Below this is considered small
  10     define('USER_LARGE_CLASS', 200);  // Above this is considered large
  11     define('DEFAULT_PAGE_SIZE', 20);
  12     define('SHOW_ALL_PAGE_SIZE', 5000);
  13     define('MODE_BRIEF', 0);
  14     define('MODE_USERDETAILS', 1);
  15
  16     $page         = optional_param('page', 0, PARAM_INT);                     // which page to show
  17     $perpage      = optional_param('perpage', DEFAULT_PAGE_SIZE, PARAM_INT);  // how many per page
  18     $mode         = optional_param('mode', NULL, PARAM_INT);                  // use the MODE_ constants
  19     $accesssince  = optional_param('accesssince',0,PARAM_INT);                // filter by last access. -1 = never
  20     $search       = optional_param('search','',PARAM_RAW);                    // make sure it is processed with p() or s() when sending to output!
  21     $roleid       = optional_param('roleid', 0, PARAM_INT);                   // optional roleid, 0 means all enrolled users (or all on the frontpage)
  22
  23     $contextid    = optional_param('contextid', 0, PARAM_INT);                // one of this or
  24     $courseid     = optional_param('id', 0, PARAM_INT);                       // this are required
  25
  26     $PAGE->set_url('/user/index.php', array(
  27             'page' => $page,
  28             'perpage' => $perpage,
  29             'mode' => $mode,
  30             'accesssince' => $accesssince,
  31             'search' => $search,
  32             'roleid' => $roleid,
  33             'contextid' => $contextid,
  34             'id' => $courseid));
  35
  36     if ($contextid) {
  37         $context = get_context_instance_by_id($contextid, MUST_EXIST);
  38         if ($context->contextlevel != CONTEXT_COURSE) {
  39             print_error('invalidcontext');
  40         }
  41         $course = $DB->get_record('course', array('id'=>$context->instanceid), '*', MUST_EXIST);
  42     } else {
  43         $course = $DB->get_record('course', array('id'=>$courseid), '*', MUST_EXIST);
  44         $context = get_context_instance(CONTEXT_COURSE, $course->id, MUST_EXIST);
  45     }
  46     // not needed anymore
  47     unset($contextid);
  48     unset($courseid);
  49
  50     require_login($course);
  51
  52     $systemcontext = get_context_instance(CONTEXT_SYSTEM);
  53     $isfrontpage = ($course->id == SITEID);
  54
  55     $frontpagectx = get_context_instance(CONTEXT_COURSE, SITEID);
  56
  57     if ($isfrontpage) {
  58         $PAGE->set_pagelayout('admin');
  59         require_capability('moodle/site:viewparticipants', $systemcontext);
  60     } else {
  61         $PAGE->set_pagelayout('incourse');
  62         require_capability('moodle/course:viewparticipants', $context);
  63     }
  64
  65     $rolenamesurl = new moodle_url("$CFG->wwwroot/user/index.php?contextid=$context->id&sifirst=&silast=");
  66
  67     $allroles = get_all_roles();
  68     $roles = get_profile_roles($context);
  69     $allrolenames = array();
  70     if ($isfrontpage) {
  71         $rolenames = array(0=>get_string('allsiteusers', 'role'));
  72     } else {
  73         $rolenames = array(0=>get_string('allparticipants'));
  74     }
  75
  76     foreach ($allroles as $role) {
  77         $allrolenames[$role->id] = strip_tags(role_get_name($role, $context));   // Used in menus etc later on
  78         if (isset($roles[$role->id])) {
  79             $rolenames[$role->id] = $allrolenames[$role->id];
  80         }
  81     }
  82
  83     // make sure other roles may not be selected by any means
  84     if (empty($rolenames[$roleid])) {
  85         print_error('noparticipants');
  86     }
  87
  88     // no roles to display yet?
  89     // frontpage course is an exception, on the front page course we should display all users
  90     if (empty($rolenames) && !$isfrontpage) {
  91         if (has_capability('moodle/role:assign', $context)) {
  92             redirect($CFG->wwwroot.'/'.$CFG->admin.'/roles/assign.php?contextid='.$context->id);
  93         } else {
  94             print_error('noparticipants');
  95         }
  96     }
  97
  98     add_to_log($course->id, 'user', 'view all', 'index.php?id='.$course->id, '');
  99
 100     $bulkoperations = has_capability('moodle/course:bulkmessaging', $context);
 101
 102     $countries = get_string_manager()->get_list_of_countries();
 103
 104     $strnever = get_string('never');
 105
 106     $datestring = new stdClass();
 107     $datestring->year  = get_string('year');
 108     $datestring->years = get_string('years');
 109     $datestring->day   = get_string('day');
 110     $datestring->days  = get_string('days');
 111     $datestring->hour  = get_string('hour');
 112     $datestring->hours = get_string('hours');
 113     $datestring->min   = get_string('min');
 114     $datestring->mins  = get_string('mins');
 115     $datestring->sec   = get_string('sec');
 116     $datestring->secs  = get_string('secs');
 117
 118     if ($mode !== NULL) {
 119         $mode = (int)$mode;
 120         $SESSION->userindexmode = $mode;
 121     } else if (isset($SESSION->userindexmode)) {
 122         $mode = (int)$SESSION->userindexmode;
 123     } else {
 124         $mode = MODE_BRIEF;
 125     }
 126
 127 /// Check to see if groups are being used in this course
 128 /// and if so, set $currentgroup to reflect the current group
 129
 130     $groupmode    = groups_get_course_groupmode($course);   // Groups are being used
 131     $currentgroup = groups_get_course_group($course, true);
 132
 133     if (!$currentgroup) {      // To make some other functions work better later
 134         $currentgroup  = NULL;
 135     }
 136
 137     $isseparategroups = ($course->groupmode == SEPARATEGROUPS and !has_capability('moodle/site:accessallgroups', $context));
 138
 139     $PAGE->set_title("$course->shortname: ".get_string('participants'));
 140     $PAGE->set_heading($course->fullname);
 141     $PAGE->set_pagetype('course-view-' . $course->format);
 142     $PAGE->add_body_class('path-user');                     // So we can style it independently
 143     $PAGE->set_other_editing_capability('moodle/course:manageactivities');
 144
 145     echo $OUTPUT->header();
 146
 147     echo '<div class="userlist">';
 148
 149     if ($isseparategroups and (!$currentgroup) ) {
 150         // The user is not in the group so show message and exit
 151         echo $OUTPUT->heading(get_string("notingroup"));
 152         echo $OUTPUT->footer();
 153         exit;
 154     }
 155
 156
 157     // Should use this variable so that we don't break stuff every time a variable is added or changed.
 158     $baseurl = new moodle_url('/user/index.php', array(
 159             'contextid' => $context->id,
 160             'roleid' => $roleid,
 161             'id' => $course->id,
 162             'perpage' => $perpage,
 163             'accesssince' => $accesssince,
 164             'search' => s($search)));
 165
 166 /// setting up tags
 167     if ($course->id == SITEID) {
 168         $filtertype = 'site';
 169     } else if ($course->id && !$currentgroup) {
 170         $filtertype = 'course';
 171         $filterselect = $course->id;
 172     } else {
 173         $filtertype = 'group';
 174         $filterselect = $currentgroup;
 175     }
 176
 177
 178
 179 /// Get the hidden field list
 180     if (has_capability('moodle/course:viewhiddenuserfields', $context)) {
 181         $hiddenfields = array();  // teachers and admins are allowed to see everything
 182     } else {
 183         $hiddenfields = array_flip(explode(',', $CFG->hiddenuserfields));
 184     }
 185
 186     if (isset($hiddenfields['lastaccess'])) {
 187         // do not allow access since filtering
 188         $accesssince = 0;
 189     }
 190
 191 /// Print settings and things in a table across the top
 192     $controlstable = new html_table();
 193     $controlstable->attributes['class'] = 'controls';
 194     $controlstable->cellspacing = 0;
 195     $controlstable->data[] = new html_table_row();
 196
 197 /// Print my course menus
 198     if ($mycourses = enrol_get_my_courses()) {
 199         $courselist = array();
 200         $popupurl = new moodle_url('/user/index.php?roleid='.$roleid.'&sifirst=&silast=');
 201         foreach ($mycourses as $mycourse) {
 202             $coursecontext = get_context_instance(CONTEXT_COURSE, $mycourse->id);
 203             $courselist[$mycourse->id] = format_string($mycourse->shortname, true, array('context' => $coursecontext));
 204         }
 205         if (has_capability('moodle/site:viewparticipants', $systemcontext)) {
 206             unset($courselist[SITEID]);
 207             $courselist = array(SITEID => format_string($SITE->shortname, true, array('context' => $systemcontext))) + $courselist;
 208         }
 209         $select = new single_select($popupurl, 'id', $courselist, $course->id, array(''=>'choosedots'), 'courseform');
 210         $select->set_label(get_string('mycourses'));
 211         $controlstable->data[0]->cells[] = $OUTPUT->render($select);
 212     }
 213
 214     $controlstable->data[0]->cells[] = groups_print_course_menu($course, $baseurl->out(), true);
 215
 216     if (!isset($hiddenfields['lastaccess'])) {
 217         // get minimum lastaccess for this course and display a dropbox to filter by lastaccess going back this far.
 218         // we need to make it diferently for normal courses and site course
 219         if (!$isfrontpage) {
 220             $minlastaccess = $DB->get_field_sql('SELECT min(timeaccess)
 221                                                    FROM {user_lastaccess}
 222                                                   WHERE courseid = ?
 223                                                         AND timeaccess != 0', array($course->id));
 224             $lastaccess0exists = $DB->record_exists('user_lastaccess', array('courseid'=>$course->id, 'timeaccess'=>0));
 225         } else {
 226             $minlastaccess = $DB->get_field_sql('SELECT min(lastaccess)
 227                                                    FROM {user}
 228                                                   WHERE lastaccess != 0');
 229             $lastaccess0exists = $DB->record_exists('user', array('lastaccess'=>0));
 230         }
 231
 232         $now = usergetmidnight(time());
 233         $timeaccess = array();
 234         $baseurl->remove_params('accesssince');
 235
 236         // makes sense for this to go first.
 237         $timeoptions[0] = get_string('selectperiod');
 238
 239         // days
 240         for ($i = 1; $i < 7; $i++) {
 241             if (strtotime('-'.$i.' days',$now) >= $minlastaccess) {
 242                 $timeoptions[strtotime('-'.$i.' days',$now)] = get_string('numdays','moodle',$i);
 243             }
 244         }
 245         // weeks
 246         for ($i = 1; $i < 10; $i++) {
 247             if (strtotime('-'.$i.' weeks',$now) >= $minlastaccess) {
 248                 $timeoptions[strtotime('-'.$i.' weeks',$now)] = get_string('numweeks','moodle',$i);
 249             }
 250         }
 251         // months
 252         for ($i = 2; $i < 12; $i++) {
 253             if (strtotime('-'.$i.' months',$now) >= $minlastaccess) {
 254                 $timeoptions[strtotime('-'.$i.' months',$now)] = get_string('nummonths','moodle',$i);
 255             }
 256         }
 257         // try a year
 258         if (strtotime('-1 year',$now) >= $minlastaccess) {
 259             $timeoptions[strtotime('-1 year',$now)] = get_string('lastyear');
 260         }
 261
 262         if (!empty($lastaccess0exists)) {
 263             $timeoptions[-1] = get_string('never');
 264         }
 265
 266         if (count($timeoptions) > 1) {
 267             $select = new single_select($baseurl, 'accesssince', $timeoptions, $accesssince, null, 'timeoptions');
 268             $select->set_label(get_string('usersnoaccesssince'));
 269             $controlstable->data[0]->cells[] = $OUTPUT->render($select);
 270         }
 271     }
 272
 273     $formatmenu = array( '0' => get_string('brief'),
 274                          '1' => get_string('userdetails'));
 275     $select = new single_select($baseurl, 'mode', $formatmenu, $mode, null, 'formatmenu');
 276     $select->set_label(get_string('userlist'));
 277     $userlistcell = new html_table_cell();
 278     $userlistcell->attributes['class'] = 'right';
 279     $userlistcell->text = $OUTPUT->render($select);
 280     $controlstable->data[0]->cells[] = $userlistcell;
 281
 282     echo html_writer::table($controlstable);
 283
 284     if ($currentgroup and (!$isseparategroups or has_capability('moodle/site:accessallgroups', $context))) {    /// Display info about the group
 285         if ($group = groups_get_group($currentgroup)) {
 286             if (!empty($group->description) or (!empty($group->picture) and empty($group->hidepicture))) {
 287                 $groupinfotable = new html_table();
 288                 $groupinfotable->attributes['class'] = 'groupinfobox';
 289                 $picturecell = new html_table_cell();
 290                 $picturecell->attributes['class'] = 'left side picture';
 291                 $picturecell->text = print_group_picture($group, $course->id, true, true, false);
 292
 293                 $contentcell = new html_table_cell();
 294                 $contentcell->attributes['class'] = 'content';
 295
 296                 $contentheading = $group->name;
 297                 if (has_capability('moodle/course:managegroups', $context)) {
 298                     $aurl = new moodle_url('/group/group.php', array('id' => $group->id, 'courseid' => $group->courseid));
 299                     $contentheading .= '&nbsp;' . $OUTPUT->action_icon($aurl, new pix_icon('t/edit', get_string('editgroupprofile')));
 300                 }
 301
 302                 $group->description = file_rewrite_pluginfile_urls($group->description, 'pluginfile.php', $context->id, 'group', 'description', $group->id);
 303                 if (!isset($group->descriptionformat)) {
 304                     $group->descriptionformat = FORMAT_MOODLE;
 305                 }
 306                 $options = array('overflowdiv'=>true);
 307                 $contentcell->text = $OUTPUT->heading($contentheading, 3) . format_text($group->description, $group->descriptionformat, $options);
 308                 $groupinfotable->data[] = new html_table_row(array($picturecell, $contentcell));
 309                 echo html_writer::table($groupinfotable);
 310             }
 311         }
 312     }
 313
 314     /// Define a table showing a list of users in the current role selection
 315
 316     $tablecolumns = array('userpic', 'fullname');
 317     $extrafields = get_extra_user_fields($context);
 318     $tableheaders = array(get_string('userpic'), get_string('fullnameuser'));
 319     if ($mode === MODE_BRIEF) {
 320         foreach ($extrafields as $field) {
 321             $tablecolumns[] = $field;
 322             $tableheaders[] = get_user_field_name($field);
 323         }
 324     }
 325     if ($mode === MODE_BRIEF && !isset($hiddenfields['city'])) {
 326         $tablecolumns[] = 'city';
 327         $tableheaders[] = get_string('city');
 328     }
 329     if ($mode === MODE_BRIEF && !isset($hiddenfields['country'])) {
 330         $tablecolumns[] = 'country';
 331         $tableheaders[] = get_string('country');
 332     }
 333     if (!isset($hiddenfields['lastaccess'])) {
 334         $tablecolumns[] = 'lastaccess';
 335         $tableheaders[] = get_string('lastaccess');
 336     }
 337
 338     if ($bulkoperations) {
 339         $tablecolumns[] = 'select';
 340         $tableheaders[] = get_string('select');
 341     }
 342
 343     $table = new flexible_table('user-index-participants-'.$course->id);
 344     $table->define_columns($tablecolumns);
 345     $table->define_headers($tableheaders);
 346     $table->define_baseurl($baseurl->out());
 347
 348     if (!isset($hiddenfields['lastaccess'])) {
 349         $table->sortable(true, 'lastaccess', SORT_DESC);
 350     } else {
 351         $table->sortable(true, 'firstname', SORT_ASC);
 352     }
 353
 354     $table->no_sorting('roles');
 355     $table->no_sorting('groups');
 356     $table->no_sorting('groupings');
 357     $table->no_sorting('select');
 358
 359     $table->set_attribute('cellspacing', '0');
 360     $table->set_attribute('id', 'participants');
 361     $table->set_attribute('class', 'generaltable generalbox');
 362
 363     $table->set_control_variables(array(
 364                 TABLE_VAR_SORT    => 'ssort',
 365                 TABLE_VAR_HIDE    => 'shide',
 366                 TABLE_VAR_SHOW    => 'sshow',
 367                 TABLE_VAR_IFIRST  => 'sifirst',
 368                 TABLE_VAR_ILAST   => 'silast',
 369                 TABLE_VAR_PAGE    => 'spage'
 370                 ));
 371     $table->setup();
 372
 373     // we are looking for all users with this role assigned in this context or higher
 374     $contextlist = get_related_contexts_string($context);
 375
 376     list($esql, $params) = get_enrolled_sql($context, NULL, $currentgroup, true);
 377     $joins = array("FROM {user} u");
 378     $wheres = array();
 379
 380     $extrasql = get_extra_user_fields_sql($context, 'u', '', array(
 381             'id', 'username', 'firstname', 'lastname', 'email', 'city', 'country',
 382             'picture', 'lang', 'timezone', 'maildisplay', 'imagealt', 'lastaccess'));
 383
 384     if ($isfrontpage) {
 385         $select = "SELECT u.id, u.username, u.firstname, u.lastname,
 386                           u.email, u.city, u.country, u.picture,
 387                           u.lang, u.timezone, u.maildisplay, u.imagealt,
 388                           u.lastaccess$extrasql";
 389         $joins[] = "JOIN ($esql) e ON e.id = u.id"; // everybody on the frontpage usually
 390         if ($accesssince) {
 391             $wheres[] = get_user_lastaccess_sql($accesssince);
 392         }
 393
 394     } else {
 395         $select = "SELECT u.id, u.username, u.firstname, u.lastname,
 396                           u.email, u.city, u.country, u.picture,
 397                           u.lang, u.timezone, u.maildisplay, u.imagealt,
 398                           COALESCE(ul.timeaccess, 0) AS lastaccess$extrasql";
 399         $joins[] = "JOIN ($esql) e ON e.id = u.id"; // course enrolled users only
 400         $joins[] = "LEFT JOIN {user_lastaccess} ul ON (ul.userid = u.id AND ul.courseid = :courseid)"; // not everybody accessed course yet
 401         $params['courseid'] = $course->id;
 402         if ($accesssince) {
 403             $wheres[] = get_course_lastaccess_sql($accesssince);
 404         }
 405     }
 406
 407     // performance hacks - we preload user contexts together with accounts
 408     list($ccselect, $ccjoin) = context_instance_preload_sql('u.id', CONTEXT_USER, 'ctx');
 409     $select .= $ccselect;
 410     $joins[] = $ccjoin;
 411
 412
 413     // limit list to users with some role only
 414     if ($roleid) {
 415         $wheres[] = "u.id IN (SELECT userid FROM {role_assignments} WHERE roleid = :roleid AND contextid $contextlist)";
 416         $params['roleid'] = $roleid;
 417     }
 418
 419     $from = implode("\n", $joins);
 420     if ($wheres) {
 421         $where = "WHERE " . implode(" AND ", $wheres);
 422     } else {
 423         $where = "";
 424     }
 425
 426     $totalcount = $DB->count_records_sql("SELECT COUNT(u.id) $from $where", $params);
 427
 428     if (!empty($search)) {
 429         $fullname = $DB->sql_fullname('u.firstname','u.lastname');
 430         $wheres[] = "(". $DB->sql_like($fullname, ':search1', false, false) .
 431                     " OR ". $DB->sql_like('email', ':search2', false, false) .
 432                     " OR ". $DB->sql_like('idnumber', ':search3', false, false) .") ";
 433         $params['search1'] = "%$search%";
 434         $params['search2'] = "%$search%";
 435         $params['search3'] = "%$search%";
 436     }
 437
 438     list($twhere, $tparams) = $table->get_sql_where();
 439     if ($twhere) {
 440         $wheres[] = $twhere;
 441         $params = array_merge($params, $tparams);
 442     }
 443
 444     $from = implode("\n", $joins);
 445     if ($wheres) {
 446         $where = "WHERE " . implode(" AND ", $wheres);
 447     } else {
 448         $where = "";
 449     }
 450
 451     if ($table->get_sql_sort()) {
 452         $sort = ' ORDER BY '.$table->get_sql_sort();
 453     } else {
 454         $sort = '';
 455     }
 456
 457     $matchcount = $DB->count_records_sql("SELECT COUNT(u.id) $from $where", $params);
 458
 459     $table->initialbars(true);
 460     $table->pagesize($perpage, $matchcount);
 461
 462     // list of users at the current visible page - paging makes it relatively short
 463     $userlist = $DB->get_recordset_sql("$select $from $where $sort", $params, $table->get_page_start(), $table->get_page_size());
 464
 465     /// If there are multiple Roles in the course, then show a drop down menu for switching
 466     if (count($rolenames) > 1) {
 467         echo '<div class="rolesform">';
 468         echo '<label for="rolesform_jump">'.get_string('currentrole', 'role').'&nbsp;</label>';
 469         echo $OUTPUT->single_select($rolenamesurl, 'roleid', $rolenames, $roleid, null, 'rolesform');
 470         echo '</div>';
 471
 472     } else if (count($rolenames) == 1) {
 473         // when all users with the same role - print its name
 474         echo '<div class="rolesform">';
 475         echo get_string('role').get_string('labelsep', 'langconfig');
 476         $rolename = reset($rolenames);
 477         echo $rolename;
 478         echo '</div>';
 479     }
 480
 481     if ($roleid > 0) {
 482         $a = new stdClass();
 483         $a->number = $totalcount;
 484         $a->role = $rolenames[$roleid];
 485         $heading = format_string(get_string('xuserswiththerole', 'role', $a));
 486
 487         if ($currentgroup and $group) {
 488             $a->group = $group->name;
 489             $heading .= ' ' . format_string(get_string('ingroup', 'role', $a));
 490         }
 491
 492         if ($accesssince) {
 493             $a->timeperiod = $timeoptions[$accesssince];
 494             $heading .= ' ' . format_string(get_string('inactiveformorethan', 'role', $a));
 495         }
 496
 497         $heading .= ": $a->number";
 498
 499         if (user_can_assign($context, $roleid)) {
 500             $heading .= ' <a href="'.$CFG->wwwroot.'/'.$CFG->admin.'/roles/assign.php?roleid='.$roleid.'&amp;contextid='.$context->id.'">';
 501             $heading .= '<img src="'.$OUTPUT->pix_url('i/edit') . '" class="icon" alt="" /></a>';
 502         }
 503         echo $OUTPUT->heading($heading, 3);
 504     } else {
 505         if ($course->id != SITEID && has_capability('moodle/course:enrolreview', $context)) {
 506             $editlink = $OUTPUT->action_icon(new moodle_url('/enrol/users.php', array('id' => $course->id)),
 507                                              new pix_icon('i/edit', get_string('edit')));
 508         } else {
 509             $editlink = '';
 510         }
 511         if ($course->id == SITEID and $roleid < 0) {
 512             $strallparticipants = get_string('allsiteusers', 'role');
 513         } else {
 514             $strallparticipants = get_string('allparticipants');
 515         }
 516         if ($matchcount < $totalcount) {
 517             echo $OUTPUT->heading($strallparticipants.get_string('labelsep', 'langconfig').$matchcount.'/'.$totalcount . $editlink, 3);
 518         } else {
 519             echo $OUTPUT->heading($strallparticipants.get_string('labelsep', 'langconfig').$matchcount . $editlink, 3);
 520         }
 521     }
 522
 523
 524     if ($bulkoperations) {
 525         echo '<form action="action_redir.php" method="post" id="participantsform">';
 526         echo '<div>';
 527         echo '<input type="hidden" name="sesskey" value="'.sesskey().'" />';
 528         echo '<input type="hidden" name="returnto" value="'.s($PAGE->url->out(false)).'" />';
 529     }
 530
 531     if ($mode === MODE_USERDETAILS) {    // Print simple listing
 532         if ($totalcount < 1) {
 533             echo $OUTPUT->heading(get_string('nothingtodisplay'));
 534         } else {
 535             if ($totalcount > $perpage) {
 536
 537                 $firstinitial = $table->get_initial_first();
 538                 $lastinitial  = $table->get_initial_last();
 539                 $strall = get_string('all');
 540                 $alpha  = explode(',', get_string('alphabet', 'langconfig'));
 541
 542                 // Bar of first initials
 543
 544                 echo '<div class="initialbar firstinitial">'.get_string('firstname').' : ';
 545                 if(!empty($firstinitial)) {
 546                     echo '<a href="'.$baseurl->out().'&amp;sifirst=">'.$strall.'</a>';
 547                 } else {
 548                     echo '<strong>'.$strall.'</strong>';
 549                 }
 550                 foreach ($alpha as $letter) {
 551                     if ($letter == $firstinitial) {
 552                         echo ' <strong>'.$letter.'</strong>';
 553                     } else {
 554                         echo ' <a href="'.$baseurl->out().'&amp;sifirst='.$letter.'">'.$letter.'</a>';
 555                     }
 556                 }
 557                 echo '</div>';
 558
 559                 // Bar of last initials
 560
 561                 echo '<div class="initialbar lastinitial">'.get_string('lastname').' : ';
 562                 if(!empty($lastinitial)) {
 563                     echo '<a href="'.$baseurl->out().'&amp;silast=">'.$strall.'</a>';
 564                 } else {
 565                     echo '<strong>'.$strall.'</strong>';
 566                 }
 567                 foreach ($alpha as $letter) {
 568                     if ($letter == $lastinitial) {
 569                         echo ' <strong>'.$letter.'</strong>';
 570                     } else {
 571                         echo ' <a href="'.$baseurl->out().'&amp;silast='.$letter.'">'.$letter.'</a>';
 572                     }
 573                 }
 574                 echo '</div>';
 575
 576                 $pagingbar = new paging_bar($matchcount, intval($table->get_page_start() / $perpage), $perpage, $baseurl);
 577                 $pagingbar->pagevar = 'spage';
 578                 echo $OUTPUT->render($pagingbar);
 579             }
 580
 581             if ($matchcount > 0) {
 582                 $usersprinted = array();
 583                 foreach ($userlist as $user) {
 584                     if (in_array($user->id, $usersprinted)) { /// Prevent duplicates by r.hidden - MDL-13935
 585                         continue;
 586                     }
 587                     $usersprinted[] = $user->id; /// Add new user to the array of users printed
 588
 589                     context_instance_preload($user);
 590
 591                     $context = get_context_instance(CONTEXT_COURSE, $course->id);
 592                     $usercontext = get_context_instance(CONTEXT_USER, $user->id);
 593
 594                     $countries = get_string_manager()->get_list_of_countries();
 595
 596                     /// Get the hidden field list
 597                     if (has_capability('moodle/course:viewhiddenuserfields', $context)) {
 598                         $hiddenfields = array();
 599                     } else {
 600                         $hiddenfields = array_flip(explode(',', $CFG->hiddenuserfields));
 601                     }
 602                     $table = new html_table();
 603                     $table->attributes['class'] = 'userinfobox';
 604
 605                     $row = new html_table_row();
 606                     $row->cells[0] = new html_table_cell();
 607                     $row->cells[0]->attributes['class'] = 'left side';
 608
 609                     $row->cells[0]->text = $OUTPUT->user_picture($user, array('size' => 100, 'courseid'=>$course->id));
 610                     $row->cells[1] = new html_table_cell();
 611                     $row->cells[1]->attributes['class'] = 'content';
 612
 613                     $row->cells[1]->text = $OUTPUT->container(fullname($user, has_capability('moodle/site:viewfullnames', $context)), 'username');
 614                     $row->cells[1]->text .= $OUTPUT->container_start('info');
 615
 616                     if (!empty($user->role)) {
 617                         $row->cells[1]->text .= get_string('role').get_string('labelsep', 'langconfig').$user->role.'<br />';
 618                     }
 619                     if ($user->maildisplay == 1 or ($user->maildisplay == 2 and ($course->id != SITEID) and !isguestuser()) or
 620                                 has_capability('moodle/course:viewhiddenuserfields', $context) or
 621                                 in_array('email', $extrafields)) {
 622                         $row->cells[1]->text .= get_string('email').get_string('labelsep', 'langconfig').html_writer::link("mailto:$user->email", $user->email) . '<br />';
 623                     }
 624                     foreach ($extrafields as $field) {
 625                         if ($field === 'email') {
 626                             // Skip email because it was displayed with different
 627                             // logic above (because this page is intended for
 628                             // students too)
 629                             continue;
 630                         }
 631                         $row->cells[1]->text .= get_user_field_name($field) .
 632                                 get_string('labelsep', 'langconfig') . s($user->{$field}) . '<br />';
 633                     }
 634                     if (($user->city or $user->country) and (!isset($hiddenfields['city']) or !isset($hiddenfields['country']))) {
 635                         $row->cells[1]->text .= get_string('city').get_string('labelsep', 'langconfig');
 636                         if ($user->city && !isset($hiddenfields['city'])) {
 637                             $row->cells[1]->text .= $user->city;
 638                         }
 639                         if (!empty($countries[$user->country]) && !isset($hiddenfields['country'])) {
 640                             if ($user->city && !isset($hiddenfields['city'])) {
 641                                 $row->cells[1]->text .= ', ';
 642                             }
 643                             $row->cells[1]->text .= $countries[$user->country];
 644                         }
 645                         $row->cells[1]->text .= '<br />';
 646                     }
 647
 648                     if (!isset($hiddenfields['lastaccess'])) {
 649                         if ($user->lastaccess) {
 650                             $row->cells[1]->text .= get_string('lastaccess').get_string('labelsep', 'langconfig').userdate($user->lastaccess);
 651                             $row->cells[1]->text .= '&nbsp; ('. format_time(time() - $user->lastaccess, $datestring) .')';
 652                         } else {
 653                             $row->cells[1]->text .= get_string('lastaccess').get_string('labelsep', 'langconfig').get_string('never');
 654                         }
 655                     }
 656
 657                     $row->cells[1]->text .= $OUTPUT->container_end();
 658
 659                     $row->cells[2] = new html_table_cell();
 660                     $row->cells[2]->attributes['class'] = 'links';
 661                     $row->cells[2]->text = '';
 662
 663                     $links = array();
 664
 665                     if ($CFG->bloglevel > 0) {
 666                         $links[] = html_writer::link(new moodle_url('/blog/index.php?userid='.$user->id), get_string('blogs','blog'));
 667                     }
 668
 669                     if (!empty($CFG->enablenotes) and (has_capability('moodle/notes:manage', $context) || has_capability('moodle/notes:view', $context))) {
 670                         $links[] = html_writer::link(new moodle_url('/notes/index.php?course=' . $course->id. '&user='.$user->id), get_string('notes','notes'));
 671                     }
 672
 673                     if (has_capability('moodle/site:viewreports', $context) or has_capability('moodle/user:viewuseractivitiesreport', $usercontext)) {
 674                         $links[] = html_writer::link(new moodle_url('/course/user.php?id='. $course->id .'&user='. $user->id), get_string('activity'));
 675                     }
 676
 677                     if ($USER->id != $user->id && !session_is_loggedinas() && has_capability('moodle/user:loginas', $context) && !is_siteadmin($user->id)) {
 678                         $links[] = html_writer::link(new moodle_url('/course/loginas.php?id='. $course->id .'&user='. $user->id .'&sesskey='. sesskey()), get_string('loginas'));
 679                     }
 680
 681                     $links[] = html_writer::link(new moodle_url('/user/view.php?id='. $user->id .'&course='. $course->id), get_string('fullprofile') . '...');
 682
 683                     $row->cells[2]->text .= implode('', $links);
 684
 685                     if ($bulkoperations) {
 686                         $row->cells[2]->text .= '<br /><input type="checkbox" class="usercheckbox" name="user'.$user->id.'" /> ';
 687                     }
 688                     $table->data = array($row);
 689                     echo html_writer::table($table);
 690                 }
 691
 692             } else {
 693                 echo $OUTPUT->heading(get_string('nothingtodisplay'));
 694             }
 695         }
 696
 697     } else {
 698         $countrysort = (strpos($sort, 'country') !== false);
 699         $timeformat = get_string('strftimedate');
 700
 701
 702         if ($userlist)  {
 703
 704             $usersprinted = array();
 705             foreach ($userlist as $user) {
 706                 if (in_array($user->id, $usersprinted)) { /// Prevent duplicates by r.hidden - MDL-13935
 707                     continue;
 708                 }
 709                 $usersprinted[] = $user->id; /// Add new user to the array of users printed
 710
 711                 context_instance_preload($user);
 712
 713                 if ($user->lastaccess) {
 714                     $lastaccess = format_time(time() - $user->lastaccess, $datestring);
 715                 } else {
 716                     $lastaccess = $strnever;
 717                 }
 718
 719                 if (empty($user->country)) {
 720                     $country = '';
 721
 722                 } else {
 723                     if($countrysort) {
 724                         $country = '('.$user->country.') '.$countries[$user->country];
 725                     }
 726                     else {
 727                         $country = $countries[$user->country];
 728                     }
 729                 }
 730
 731                 $usercontext = get_context_instance(CONTEXT_USER, $user->id);
 732
 733                 if ($piclink = ($USER->id == $user->id || has_capability('moodle/user:viewdetails', $context) || has_capability('moodle/user:viewdetails', $usercontext))) {
 734                     $profilelink = '<strong><a href="'.$CFG->wwwroot.'/user/view.php?id='.$user->id.'&amp;course='.$course->id.'">'.fullname($user).'</a></strong>';
 735                 } else {
 736                     $profilelink = '<strong>'.fullname($user).'</strong>';
 737                 }
 738
 739                 $data = array ($OUTPUT->user_picture($user, array('size' => 35, 'courseid'=>$course->id)), $profilelink);
 740
 741                 if ($mode === MODE_BRIEF) {
 742                     foreach ($extrafields as $field) {
 743                         $data[] = $user->{$field};
 744                     }
 745                 }
 746                 if ($mode === MODE_BRIEF && !isset($hiddenfields['city'])) {
 747                     $data[] = $user->city;
 748                 }
 749                 if ($mode === MODE_BRIEF && !isset($hiddenfields['country'])) {
 750                     $data[] = $country;
 751                 }
 752                 if (!isset($hiddenfields['lastaccess'])) {
 753                     $data[] = $lastaccess;
 754                 }
 755
 756                 if (isset($userlist_extra) && isset($userlist_extra[$user->id])) {
 757                     $ras = $userlist_extra[$user->id]['ra'];
 758                     $rastring = '';
 759                     foreach ($ras AS $key=>$ra) {
 760                         $rolename = $allrolenames[$ra['roleid']] ;
 761                         if ($ra['ctxlevel'] == CONTEXT_COURSECAT) {
 762                             $rastring .= $rolename. ' @ ' . '<a href="'.$CFG->wwwroot.'/course/category.php?id='.$ra['ctxinstanceid'].'">'.s($ra['ccname']).'</a>';
 763                         } elseif ($ra['ctxlevel'] == CONTEXT_SYSTEM) {
 764                             $rastring .= $rolename. ' - ' . get_string('globalrole','role');
 765                         } else {
 766                             $rastring .= $rolename;
 767                         }
 768                     }
 769                     $data[] = $rastring;
 770                     if ($groupmode != 0) {
 771                         // htmlescape with s() and implode the array
 772                         $data[] = implode(', ', array_map('s',$userlist_extra[$user->id]['group']));
 773                         $data[] = implode(', ', array_map('s', $userlist_extra[$user->id]['gping']));
 774                     }
 775                 }
 776
 777                 if ($bulkoperations) {
 778                     $data[] = '<input type="checkbox" class="usercheckbox" name="user'.$user->id.'" />';
 779                 }
 780                 $table->add_data($data);
 781             }
 782         }
 783
 784         $table->print_html();
 785
 786     }
 787
 788     if ($bulkoperations) {
 789         echo '<br /><div class="buttons">';
 790         echo '<input type="button" id="checkall" value="'.get_string('selectall').'" /> ';
 791         echo '<input type="button" id="checknone" value="'.get_string('deselectall').'" /> ';
 792         $displaylist = array();
 793         $displaylist['messageselect.php'] = get_string('messageselectadd');
 794         if (!empty($CFG->enablenotes) && has_capability('moodle/notes:manage', $context) && $context->id != $frontpagectx->id) {
 795             $displaylist['addnote.php'] = get_string('addnewnote', 'notes');
 796             $displaylist['groupaddnote.php'] = get_string('groupaddnewnote', 'notes');
 797         }
 798
 799         echo $OUTPUT->help_icon('withselectedusers');
 800         echo html_writer::tag('label', get_string("withselectedusers"), array('for'=>'formactionid'));
 801         echo html_writer::select($displaylist, 'formaction', '', array(''=>'choosedots'), array('id'=>'formactionid'));
 802
 803         echo '<input type="hidden" name="id" value="'.$course->id.'" />';
 804         echo '<noscript style="display:inline">';
 805         echo '<div><input type="submit" value="'.get_string('ok').'" /></div>';
 806         echo '</noscript>';
 807         echo '</div></div>';
 808         echo '</form>';
 809
 810         $module = array('name'=>'core_user', 'fullpath'=>'/user/module.js');
 811         $PAGE->requires->js_init_call('M.core_user.init_participation', null, false, $module);
 812     }
 813
 814     if (has_capability('moodle/site:viewparticipants', $context) && $totalcount > ($perpage*3)) {
 815         echo '<form action="index.php" class="searchform"><div><input type="hidden" name="id" value="'.$course->id.'" />'.get_string('search').':&nbsp;'."\n";
 816         echo '<input type="text" name="search" value="'.s($search).'" />&nbsp;<input type="submit" value="'.get_string('search').'" /></div></form>'."\n";
 817     }
 818
 819     $perpageurl = clone($baseurl);
 820     $perpageurl->remove_params('perpage');
 821     if ($perpage == SHOW_ALL_PAGE_SIZE) {
 822         $perpageurl->param('perpage', DEFAULT_PAGE_SIZE);
 823         echo $OUTPUT->container(html_writer::link($perpageurl, get_string('showperpage', '', DEFAULT_PAGE_SIZE)), array(), 'showall');
 824
 825     } else if ($matchcount > 0 && $perpage < $matchcount) {
 826         $perpageurl->param('perpage', SHOW_ALL_PAGE_SIZE);
 827         echo $OUTPUT->container(html_writer::link($perpageurl, get_string('showall', '', $matchcount)), array(), 'showall');
 828     }
 829
 830     echo '</div>';  // userlist
 831
 832     echo $OUTPUT->footer();
 833
 834     if ($userlist) {
 835         $userlist->close();
 836     }
 837
 838
 839 function get_course_lastaccess_sql($accesssince='') {
 840     if (empty($accesssince)) {
 841         return '';
 842     }
 843     if ($accesssince == -1) { // never
 844         return 'ul.timeaccess = 0';
 845     } else {
 846         return 'ul.timeaccess != 0 AND ul.timeaccess < '.$accesssince;
 847     }
 848 }
 849
 850 function get_user_lastaccess_sql($accesssince='') {
 851     if (empty($accesssince)) {
 852         return '';
 853     }
 854     if ($accesssince == -1) { // never
 855         return 'u.lastaccess = 0';
 856     } else {
 857         return 'u.lastaccess != 0 AND u.lastaccess < '.$accesssince;
 858     }
 859 }