user/index.php

   1 <?php
   2 // This file is part of Moodle - http://moodle.org/
   3 //
   4 // Moodle is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, either version 3 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // Moodle is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License
  15 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 /**
  18  * Lists all the users within a given course.
  19  *
  20  * @copyright 1999 Martin Dougiamas  http://dougiamas.com
  21  * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  22  * @package core_user
  23  */
  24
  25 require_once('../config.php');
  26 require_once($CFG->dirroot.'/user/lib.php');
  27 require_once($CFG->libdir.'/tablelib.php');
  28 require_once($CFG->libdir.'/filelib.php');
  29
  30 define('USER_SMALL_CLASS', 20);   // Below this is considered small.
  31 define('USER_LARGE_CLASS', 200);  // Above this is considered large.
  32 define('DEFAULT_PAGE_SIZE', 20);
  33 define('SHOW_ALL_PAGE_SIZE', 5000);
  34 define('MODE_BRIEF', 0);
  35 define('MODE_USERDETAILS', 1);
  36
  37 $page         = optional_param('page', 0, PARAM_INT); // Which page to show.
  38 $perpage      = optional_param('perpage', DEFAULT_PAGE_SIZE, PARAM_INT); // How many per page.
  39 $mode         = optional_param('mode', null, PARAM_INT); // Use the MODE_ constants.
  40 $accesssince  = optional_param('accesssince', 0, PARAM_INT); // Filter by last access. -1 = never.
  41 $search       = optional_param('search', '', PARAM_RAW); // Make sure it is processed with p() or s() when sending to output!
  42 $roleid       = optional_param('roleid', 0, PARAM_INT); // Optional roleid, 0 means all enrolled users (or all on the frontpage).
  43 $contextid    = optional_param('contextid', 0, PARAM_INT); // One of this or.
  44 $courseid     = optional_param('id', 0, PARAM_INT); // This are required.
  45
  46 $PAGE->set_url('/user/index.php', array(
  47         'page' => $page,
  48         'perpage' => $perpage,
  49         'mode' => $mode,
  50         'accesssince' => $accesssince,
  51         'search' => $search,
  52         'roleid' => $roleid,
  53         'contextid' => $contextid,
  54         'id' => $courseid));
  55
  56 if ($contextid) {
  57     $context = context::instance_by_id($contextid, MUST_EXIST);
  58     if ($context->contextlevel != CONTEXT_COURSE) {
  59         print_error('invalidcontext');
  60     }
  61     $course = $DB->get_record('course', array('id' => $context->instanceid), '*', MUST_EXIST);
  62 } else {
  63     $course = $DB->get_record('course', array('id' => $courseid), '*', MUST_EXIST);
  64     $context = context_course::instance($course->id, MUST_EXIST);
  65 }
  66 // Not needed anymore.
  67 unset($contextid);
  68 unset($courseid);
  69
  70 require_login($course);
  71
  72 $systemcontext = context_system::instance();
  73 $isfrontpage = ($course->id == SITEID);
  74
  75 $frontpagectx = context_course::instance(SITEID);
  76
  77 if ($isfrontpage) {
  78     $PAGE->set_pagelayout('admin');
  79     require_capability('moodle/site:viewparticipants', $systemcontext);
  80 } else {
  81     $PAGE->set_pagelayout('incourse');
  82     require_capability('moodle/course:viewparticipants', $context);
  83 }
  84
  85 $rolenamesurl = new moodle_url("$CFG->wwwroot/user/index.php?contextid=$context->id&sifirst=&silast=");
  86
  87 $rolenames = role_fix_names(get_profile_roles($context), $context, ROLENAME_ALIAS, true);
  88 if ($isfrontpage) {
  89     $rolenames[0] = get_string('allsiteusers', 'role');
  90 } else {
  91     $rolenames[0] = get_string('allparticipants');
  92 }
  93
  94 // Make sure other roles may not be selected by any means.
  95 if (empty($rolenames[$roleid])) {
  96     print_error('noparticipants');
  97 }
  98
  99 // No roles to display yet?
 100 // frontpage course is an exception, on the front page course we should display all users.
 101 if (empty($rolenames) && !$isfrontpage) {
 102     if (has_capability('moodle/role:assign', $context)) {
 103         redirect($CFG->wwwroot.'/'.$CFG->admin.'/roles/assign.php?contextid='.$context->id);
 104     } else {
 105         print_error('noparticipants');
 106     }
 107 }
 108
 109 // Trigger events.
 110 user_list_view($course, $context);
 111
 112 $bulkoperations = has_capability('moodle/course:bulkmessaging', $context);
 113
 114 $countries = get_string_manager()->get_list_of_countries();
 115
 116 $strnever = get_string('never');
 117
 118 $datestring = new stdClass();
 119 $datestring->year  = get_string('year');
 120 $datestring->years = get_string('years');
 121 $datestring->day   = get_string('day');
 122 $datestring->days  = get_string('days');
 123 $datestring->hour  = get_string('hour');
 124 $datestring->hours = get_string('hours');
 125 $datestring->min   = get_string('min');
 126 $datestring->mins  = get_string('mins');
 127 $datestring->sec   = get_string('sec');
 128 $datestring->secs  = get_string('secs');
 129
 130 if ($mode !== null) {
 131     $mode = (int)$mode;
 132     $SESSION->userindexmode = $mode;
 133 } else if (isset($SESSION->userindexmode)) {
 134     $mode = (int)$SESSION->userindexmode;
 135 } else {
 136     $mode = MODE_BRIEF;
 137 }
 138
 139 // Check to see if groups are being used in this course
 140 // and if so, set $currentgroup to reflect the current group.
 141
 142 $groupmode    = groups_get_course_groupmode($course);   // Groups are being used.
 143 $currentgroup = groups_get_course_group($course, true);
 144
 145 if (!$currentgroup) {      // To make some other functions work better later.
 146     $currentgroup  = null;
 147 }
 148
 149 $isseparategroups = ($course->groupmode == SEPARATEGROUPS and !has_capability('moodle/site:accessallgroups', $context));
 150
 151 $PAGE->set_title("$course->shortname: ".get_string('participants'));
 152 $PAGE->set_heading($course->fullname);
 153 $PAGE->set_pagetype('course-view-' . $course->format);
 154 $PAGE->add_body_class('path-user');                     // So we can style it independently.
 155 $PAGE->set_other_editing_capability('moodle/course:manageactivities');
 156
 157 echo $OUTPUT->header();
 158 echo $OUTPUT->heading(get_string('participants'));
 159
 160 echo '<div class="userlist">';
 161
 162 if ($isseparategroups and (!$currentgroup) ) {
 163     // The user is not in the group so show message and exit.
 164     echo $OUTPUT->heading(get_string("notingroup"));
 165     echo $OUTPUT->footer();
 166     exit;
 167 }
 168
 169
 170 // Should use this variable so that we don't break stuff every time a variable is added or changed.
 171 $baseurl = new moodle_url('/user/index.php', array(
 172         'contextid' => $context->id,
 173         'roleid' => $roleid,
 174         'id' => $course->id,
 175         'perpage' => $perpage,
 176         'accesssince' => $accesssince,
 177         'search' => s($search)));
 178
 179 // Setting up tags.
 180 if ($course->id == SITEID) {
 181     $filtertype = 'site';
 182 } else if ($course->id && !$currentgroup) {
 183     $filtertype = 'course';
 184     $filterselect = $course->id;
 185 } else {
 186     $filtertype = 'group';
 187     $filterselect = $currentgroup;
 188 }
 189
 190
 191
 192 // Get the hidden field list.
 193 if (has_capability('moodle/course:viewhiddenuserfields', $context)) {
 194     $hiddenfields = array();  // Teachers and admins are allowed to see everything.
 195 } else {
 196     $hiddenfields = array_flip(explode(',', $CFG->hiddenuserfields));
 197 }
 198
 199 if (isset($hiddenfields['lastaccess'])) {
 200     // Do not allow access since filtering.
 201     $accesssince = 0;
 202 }
 203
 204 // Print settings and things in a table across the top.
 205 $controlstable = new html_table();
 206 $controlstable->attributes['class'] = 'controls';
 207 $controlstable->cellspacing = 0;
 208 $controlstable->data[] = new html_table_row();
 209
 210 // Print my course menus.
 211 if ($mycourses = enrol_get_my_courses()) {
 212     $courselist = array();
 213     $popupurl = new moodle_url('/user/index.php?roleid='.$roleid.'&sifirst=&silast=');
 214     foreach ($mycourses as $mycourse) {
 215         $coursecontext = context_course::instance($mycourse->id);
 216         $courselist[$mycourse->id] = format_string($mycourse->shortname, true, array('context' => $coursecontext));
 217     }
 218     if (has_capability('moodle/site:viewparticipants', $systemcontext)) {
 219         unset($courselist[SITEID]);
 220         $courselist = array(SITEID => format_string($SITE->shortname, true, array('context' => $systemcontext))) + $courselist;
 221     }
 222     $select = new single_select($popupurl, 'id', $courselist, $course->id, null, 'courseform');
 223     $select->set_label(get_string('mycourses'));
 224     $controlstable->data[0]->cells[] = $OUTPUT->render($select);
 225 }
 226
 227 if ($groupmenu = groups_print_course_menu($course, $baseurl->out(), true)) {
 228     $controlstable->data[0]->cells[] = $groupmenu;
 229 }
 230
 231 if (!isset($hiddenfields['lastaccess'])) {
 232     // Get minimum lastaccess for this course and display a dropbox to filter by lastaccess going back this far.
 233     // We need to make it diferently for normal courses and site course.
 234     if (!$isfrontpage) {
 235         $minlastaccess = $DB->get_field_sql('SELECT min(timeaccess)
 236                                                FROM {user_lastaccess}
 237                                               WHERE courseid = ?
 238                                                     AND timeaccess != 0', array($course->id));
 239         $lastaccess0exists = $DB->record_exists('user_lastaccess', array('courseid' => $course->id, 'timeaccess' => 0));
 240     } else {
 241         $minlastaccess = $DB->get_field_sql('SELECT min(lastaccess)
 242                                                FROM {user}
 243                                               WHERE lastaccess != 0');
 244         $lastaccess0exists = $DB->record_exists('user', array('lastaccess' => 0));
 245     }
 246
 247     $now = usergetmidnight(time());
 248     $timeaccess = array();
 249     $baseurl->remove_params('accesssince');
 250
 251     // Makes sense for this to go first.
 252     $timeoptions[0] = get_string('selectperiod');
 253
 254     // Days.
 255     for ($i = 1; $i < 7; $i++) {
 256         if (strtotime('-'.$i.' days', $now) >= $minlastaccess) {
 257             $timeoptions[strtotime('-'.$i.' days', $now)] = get_string('numdays', 'moodle', $i);
 258         }
 259     }
 260     // Weeks.
 261     for ($i = 1; $i < 10; $i++) {
 262         if (strtotime('-'.$i.' weeks', $now) >= $minlastaccess) {
 263             $timeoptions[strtotime('-'.$i.' weeks', $now)] = get_string('numweeks', 'moodle', $i);
 264         }
 265     }
 266     // Months.
 267     for ($i = 2; $i < 12; $i++) {
 268         if (strtotime('-'.$i.' months', $now) >= $minlastaccess) {
 269             $timeoptions[strtotime('-'.$i.' months', $now)] = get_string('nummonths', 'moodle', $i);
 270         }
 271     }
 272     // Try a year.
 273     if (strtotime('-1 year', $now) >= $minlastaccess) {
 274         $timeoptions[strtotime('-1 year', $now)] = get_string('lastyear');
 275     }
 276
 277     if (!empty($lastaccess0exists)) {
 278         $timeoptions[-1] = get_string('never');
 279     }
 280
 281     if (count($timeoptions) > 1) {
 282         $select = new single_select($baseurl, 'accesssince', $timeoptions, $accesssince, null, 'timeoptions');
 283         $select->set_label(get_string('usersnoaccesssince'));
 284         $controlstable->data[0]->cells[] = $OUTPUT->render($select);
 285     }
 286 }
 287
 288 $formatmenu = array( '0' => get_string('brief'),
 289                      '1' => get_string('userdetails'));
 290 $select = new single_select($baseurl, 'mode', $formatmenu, $mode, null, 'formatmenu');
 291 $select->set_label(get_string('userlist'));
 292 $userlistcell = new html_table_cell();
 293 $userlistcell->attributes['class'] = 'right';
 294 $userlistcell->text = $OUTPUT->render($select);
 295 $controlstable->data[0]->cells[] = $userlistcell;
 296
 297 echo html_writer::table($controlstable);
 298
 299 if ($currentgroup and (!$isseparategroups or has_capability('moodle/site:accessallgroups', $context))) {
 300     // Display info about the group.
 301     if ($group = groups_get_group($currentgroup)) {
 302         if (!empty($group->description) or (!empty($group->picture) and empty($group->hidepicture))) {
 303             $groupinfotable = new html_table();
 304             $groupinfotable->attributes['class'] = 'groupinfobox';
 305             $picturecell = new html_table_cell();
 306             $picturecell->attributes['class'] = 'left side picture';
 307             $picturecell->text = print_group_picture($group, $course->id, true, true, false);
 308
 309             $contentcell = new html_table_cell();
 310             $contentcell->attributes['class'] = 'content';
 311
 312             $contentheading = $group->name;
 313             if (has_capability('moodle/course:managegroups', $context)) {
 314                 $aurl = new moodle_url('/group/group.php', array('id' => $group->id, 'courseid' => $group->courseid));
 315                 $contentheading .= '&nbsp;' . $OUTPUT->action_icon($aurl, new pix_icon('t/edit', get_string('editgroupprofile')));
 316             }
 317
 318             $group->description = file_rewrite_pluginfile_urls($group->description, 'pluginfile.php', $context->id, 'group',
 319                 'description', $group->id);
 320             if (!isset($group->descriptionformat)) {
 321                 $group->descriptionformat = FORMAT_MOODLE;
 322             }
 323             $options = array('overflowdiv' => true);
 324             $formatteddesc = format_text($group->description, $group->descriptionformat, $options);
 325             $contentcell->text = $OUTPUT->heading($contentheading, 3) . $formatteddesc;
 326             $groupinfotable->data[] = new html_table_row(array($picturecell, $contentcell));
 327             echo html_writer::table($groupinfotable);
 328         }
 329     }
 330 }
 331
 332 // Define a table showing a list of users in the current role selection.
 333 $tablecolumns = array();
 334 $tableheaders = array();
 335 if ($bulkoperations && $mode === MODE_BRIEF) {
 336     $tablecolumns[] = 'select';
 337     $tableheaders[] = get_string('select');
 338 }
 339 $tablecolumns[] = 'userpic';
 340 $tablecolumns[] = 'fullname';
 341
 342 $extrafields = get_extra_user_fields($context);
 343 $tableheaders[] = get_string('userpic');
 344 $tableheaders[] = get_string('fullnameuser');
 345
 346 if ($mode === MODE_BRIEF) {
 347     foreach ($extrafields as $field) {
 348         $tablecolumns[] = $field;
 349         $tableheaders[] = get_user_field_name($field);
 350     }
 351 }
 352 if ($mode === MODE_BRIEF && !isset($hiddenfields['city'])) {
 353     $tablecolumns[] = 'city';
 354     $tableheaders[] = get_string('city');
 355 }
 356 if ($mode === MODE_BRIEF && !isset($hiddenfields['country'])) {
 357     $tablecolumns[] = 'country';
 358     $tableheaders[] = get_string('country');
 359 }
 360 if (!isset($hiddenfields['lastaccess'])) {
 361     $tablecolumns[] = 'lastaccess';
 362     if ($course->id == SITEID) {
 363         // Exception case for viewing participants on site home.
 364         $tableheaders[] = get_string('lastsiteaccess');
 365     } else {
 366         $tableheaders[] = get_string('lastcourseaccess');
 367     }
 368 }
 369
 370 if ($bulkoperations && $mode === MODE_USERDETAILS) {
 371     $tablecolumns[] = 'select';
 372     $tableheaders[] = get_string('select');
 373 }
 374
 375 $table = new flexible_table('user-index-participants-'.$course->id);
 376 $table->define_columns($tablecolumns);
 377 $table->define_headers($tableheaders);
 378 $table->define_baseurl($baseurl->out());
 379
 380 if (!isset($hiddenfields['lastaccess'])) {
 381     $table->sortable(true, 'lastaccess', SORT_DESC);
 382 } else {
 383     $table->sortable(true, 'firstname', SORT_ASC);
 384 }
 385
 386 $table->no_sorting('roles');
 387 $table->no_sorting('groups');
 388 $table->no_sorting('groupings');
 389 $table->no_sorting('select');
 390
 391 $table->set_attribute('cellspacing', '0');
 392 $table->set_attribute('id', 'participants');
 393 $table->set_attribute('class', 'generaltable generalbox');
 394
 395 $table->set_control_variables(array(
 396             TABLE_VAR_SORT    => 'ssort',
 397             TABLE_VAR_HIDE    => 'shide',
 398             TABLE_VAR_SHOW    => 'sshow',
 399             TABLE_VAR_IFIRST  => 'sifirst',
 400             TABLE_VAR_ILAST   => 'silast',
 401             TABLE_VAR_PAGE    => 'spage'
 402             ));
 403 $table->setup();
 404
 405 list($esql, $params) = get_enrolled_sql($context, null, $currentgroup, true);
 406 $joins = array("FROM {user} u");
 407 $wheres = array();
 408
 409 $userfields = array('username', 'email', 'city', 'country', 'lang', 'timezone', 'maildisplay');
 410 $mainuserfields = user_picture::fields('u', $userfields);
 411 $extrasql = get_extra_user_fields_sql($context, 'u', '', $userfields);
 412
 413 if ($isfrontpage) {
 414     $select = "SELECT $mainuserfields, u.lastaccess$extrasql";
 415     $joins[] = "JOIN ($esql) e ON e.id = u.id"; // Everybody on the frontpage usually.
 416     if ($accesssince) {
 417         $wheres[] = get_user_lastaccess_sql($accesssince);
 418     }
 419
 420 } else {
 421     $select = "SELECT $mainuserfields, COALESCE(ul.timeaccess, 0) AS lastaccess$extrasql";
 422     $joins[] = "JOIN ($esql) e ON e.id = u.id"; // Course enrolled users only.
 423     $joins[] = "LEFT JOIN {user_lastaccess} ul ON (ul.userid = u.id AND ul.courseid = :courseid)"; // Not everybody accessed course yet.
 424     $params['courseid'] = $course->id;
 425     if ($accesssince) {
 426         $wheres[] = get_course_lastaccess_sql($accesssince);
 427     }
 428 }
 429
 430 // Performance hacks - we preload user contexts together with accounts.
 431 $ccselect = ', ' . context_helper::get_preload_record_columns_sql('ctx');
 432 $ccjoin = "LEFT JOIN {context} ctx ON (ctx.instanceid = u.id AND ctx.contextlevel = :contextlevel)";
 433 $params['contextlevel'] = CONTEXT_USER;
 434 $select .= $ccselect;
 435 $joins[] = $ccjoin;
 436
 437
 438 // Limit list to users with some role only.
 439 if ($roleid) {
 440     // We want to query both the current context and parent contexts.
 441     list($relatedctxsql, $relatedctxparams) = $DB->get_in_or_equal($context->get_parent_context_ids(true), SQL_PARAMS_NAMED, 'relatedctx');
 442
 443     $wheres[] = "u.id IN (SELECT userid FROM {role_assignments} WHERE roleid = :roleid AND contextid $relatedctxsql)";
 444     $params = array_merge($params, array('roleid' => $roleid), $relatedctxparams);
 445 }
 446
 447 $from = implode("\n", $joins);
 448 if ($wheres) {
 449     $where = "WHERE " . implode(" AND ", $wheres);
 450 } else {
 451     $where = "";
 452 }
 453
 454 $totalcount = $DB->count_records_sql("SELECT COUNT(u.id) $from $where", $params);
 455
 456 if (!empty($search)) {
 457     $fullname = $DB->sql_fullname('u.firstname', 'u.lastname');
 458     $wheres[] = "(". $DB->sql_like($fullname, ':search1', false, false) .
 459                 " OR ". $DB->sql_like('email', ':search2', false, false) .
 460                 " OR ". $DB->sql_like('idnumber', ':search3', false, false) .") ";
 461     $params['search1'] = "%$search%";
 462     $params['search2'] = "%$search%";
 463     $params['search3'] = "%$search%";
 464 }
 465
 466 list($twhere, $tparams) = $table->get_sql_where();
 467 if ($twhere) {
 468     $wheres[] = $twhere;
 469     $params = array_merge($params, $tparams);
 470 }
 471
 472 $from = implode("\n", $joins);
 473 if ($wheres) {
 474     $where = "WHERE " . implode(" AND ", $wheres);
 475 } else {
 476     $where = "";
 477 }
 478
 479 if ($table->get_sql_sort()) {
 480     $sort = ' ORDER BY '.$table->get_sql_sort();
 481 } else {
 482     $sort = '';
 483 }
 484
 485 $matchcount = $DB->count_records_sql("SELECT COUNT(u.id) $from $where", $params);
 486
 487 $table->initialbars(true);
 488 $table->pagesize($perpage, $matchcount);
 489
 490 // List of users at the current visible page - paging makes it relatively short.
 491 $userlist = $DB->get_recordset_sql("$select $from $where $sort", $params, $table->get_page_start(), $table->get_page_size());
 492
 493 // If there are multiple Roles in the course, then show a drop down menu for switching.
 494 if (count($rolenames) > 1) {
 495     echo '<div class="rolesform">';
 496     echo $OUTPUT->single_select($rolenamesurl, 'roleid', $rolenames, $roleid, null,
 497         'rolesform', array('label' => get_string('currentrole', 'role')));
 498     echo '</div>';
 499
 500 } else if (count($rolenames) == 1) {
 501     // When all users with the same role - print its name.
 502     echo '<div class="rolesform">';
 503     echo get_string('role').get_string('labelsep', 'langconfig');
 504     $rolename = reset($rolenames);
 505     echo $rolename;
 506     echo '</div>';
 507 }
 508
 509 $editlink = '';
 510 if ($course->id != SITEID && has_capability('moodle/course:enrolreview', $context)) {
 511     $editlink = new moodle_url('/enrol/users.php', array('id' => $course->id));
 512 }
 513
 514 if ($roleid > 0) {
 515     $a = new stdClass();
 516     $a->number = $totalcount;
 517     $a->role = $rolenames[$roleid];
 518     $heading = format_string(get_string('xuserswiththerole', 'role', $a));
 519
 520     if ($currentgroup and !empty($group)) {
 521         $a->group = $group->name;
 522         $heading .= ' ' . format_string(get_string('ingroup', 'role', $a));
 523     }
 524
 525     if ($accesssince && !empty($timeoptions[$accesssince])) {
 526         $a->timeperiod = $timeoptions[$accesssince];
 527         $heading .= ' ' . format_string(get_string('inactiveformorethan', 'role', $a));
 528     }
 529
 530     $heading .= ": $a->number";
 531
 532     if (!empty($editlink)) {
 533         $editlink->param('role', $roleid);
 534         $heading .= $OUTPUT->action_icon($editlink, new pix_icon('t/edit', get_string('edit')));
 535     }
 536     echo $OUTPUT->heading($heading, 3);
 537 } else {
 538     if ($course->id == SITEID and $roleid < 0) {
 539         $strallparticipants = get_string('allsiteusers', 'role');
 540     } else {
 541         $strallparticipants = get_string('allparticipants');
 542     }
 543
 544     if (!empty($editlink)) {
 545         $editlink = $OUTPUT->action_icon($editlink, new pix_icon('t/edit', get_string('edit')));
 546     }
 547
 548     if ($matchcount < $totalcount) {
 549         echo $OUTPUT->heading($strallparticipants.get_string('labelsep', 'langconfig').$matchcount.'/'.$totalcount . $editlink, 3);
 550     } else {
 551         echo $OUTPUT->heading($strallparticipants.get_string('labelsep', 'langconfig').$matchcount . $editlink, 3);
 552     }
 553 }
 554
 555
 556 if ($bulkoperations) {
 557     echo '<form action="action_redir.php" method="post" id="participantsform">';
 558     echo '<div>';
 559     echo '<input type="hidden" name="sesskey" value="'.sesskey().'" />';
 560     echo '<input type="hidden" name="returnto" value="'.s($PAGE->url->out(false)).'" />';
 561 }
 562
 563 if ($mode === MODE_USERDETAILS) {    // Print simple listing.
 564     if ($totalcount < 1) {
 565         echo $OUTPUT->heading(get_string('nothingtodisplay'));
 566     } else {
 567         if ($totalcount > $perpage) {
 568
 569             $firstinitial = $table->get_initial_first();
 570             $lastinitial  = $table->get_initial_last();
 571             $strall = get_string('all');
 572             $alpha  = explode(',', get_string('alphabet', 'langconfig'));
 573
 574             // Bar of first initials.
 575
 576             echo '<div class="initialbar firstinitial">'.get_string('firstname').' : ';
 577             if (!empty($firstinitial)) {
 578                 echo '<a href="'.$baseurl->out().'&amp;sifirst=">'.$strall.'</a>';
 579             } else {
 580                 echo '<strong>'.$strall.'</strong>';
 581             }
 582             foreach ($alpha as $letter) {
 583                 if ($letter == $firstinitial) {
 584                     echo ' <strong>'.$letter.'</strong>';
 585                 } else {
 586                     echo ' <a href="'.$baseurl->out().'&amp;sifirst='.$letter.'">'.$letter.'</a>';
 587                 }
 588             }
 589             echo '</div>';
 590
 591             // Bar of last initials.
 592
 593             echo '<div class="initialbar lastinitial">'.get_string('lastname').' : ';
 594             if (!empty($lastinitial)) {
 595                 echo '<a href="'.$baseurl->out().'&amp;silast=">'.$strall.'</a>';
 596             } else {
 597                 echo '<strong>'.$strall.'</strong>';
 598             }
 599             foreach ($alpha as $letter) {
 600                 if ($letter == $lastinitial) {
 601                     echo ' <strong>'.$letter.'</strong>';
 602                 } else {
 603                     echo ' <a href="'.$baseurl->out().'&amp;silast='.$letter.'">'.$letter.'</a>';
 604                 }
 605             }
 606             echo '</div>';
 607
 608             $pagingbar = new paging_bar($matchcount, intval($table->get_page_start() / $perpage), $perpage, $baseurl);
 609             $pagingbar->pagevar = 'spage';
 610             echo $OUTPUT->render($pagingbar);
 611         }
 612
 613         if ($matchcount > 0) {
 614             $usersprinted = array();
 615             foreach ($userlist as $user) {
 616                 if (in_array($user->id, $usersprinted)) { // Prevent duplicates by r.hidden - MDL-13935.
 617                     continue;
 618                 }
 619                 $usersprinted[] = $user->id; // Add new user to the array of users printed.
 620
 621                 context_helper::preload_from_record($user);
 622
 623                 $context = context_course::instance($course->id);
 624                 $usercontext = context_user::instance($user->id);
 625
 626                 $countries = get_string_manager()->get_list_of_countries();
 627
 628                 // Get the hidden field list.
 629                 if (has_capability('moodle/course:viewhiddenuserfields', $context)) {
 630                     $hiddenfields = array();
 631                 } else {
 632                     $hiddenfields = array_flip(explode(',', $CFG->hiddenuserfields));
 633                 }
 634                 $table = new html_table();
 635                 $table->attributes['class'] = 'userinfobox';
 636
 637                 $row = new html_table_row();
 638                 $row->cells[0] = new html_table_cell();
 639                 $row->cells[0]->attributes['class'] = 'left side';
 640
 641                 $row->cells[0]->text = $OUTPUT->user_picture($user, array('size' => 100, 'courseid' => $course->id));
 642                 $row->cells[1] = new html_table_cell();
 643                 $row->cells[1]->attributes['class'] = 'content';
 644
 645                 $row->cells[1]->text = $OUTPUT->container(fullname($user, has_capability('moodle/site:viewfullnames', $context)), 'username');
 646                 $row->cells[1]->text .= $OUTPUT->container_start('info');
 647
 648                 if (!empty($user->role)) {
 649                     $row->cells[1]->text .= get_string('role').get_string('labelsep', 'langconfig').$user->role.'<br />';
 650                 }
 651                 if ($user->maildisplay == 1 or ($user->maildisplay == 2 and ($course->id != SITEID) and !isguestuser()) or
 652                             has_capability('moodle/course:viewhiddenuserfields', $context) or
 653                             in_array('email', $extrafields) or ($user->id == $USER->id)) {
 654                     $row->cells[1]->text .= get_string('email').get_string('labelsep', 'langconfig').html_writer::link("mailto:$user->email", $user->email) . '<br />';
 655                 }
 656                 foreach ($extrafields as $field) {
 657                     if ($field === 'email') {
 658                         // Skip email because it was displayed with different logic above
 659                         // because this page is intended for students too.
 660                         continue;
 661                     }
 662                     $row->cells[1]->text .= get_user_field_name($field) .
 663                             get_string('labelsep', 'langconfig') . s($user->{$field}) . '<br />';
 664                 }
 665                 if (($user->city or $user->country) and (!isset($hiddenfields['city']) or !isset($hiddenfields['country']))) {
 666                     $row->cells[1]->text .= get_string('city').get_string('labelsep', 'langconfig');
 667                     if ($user->city && !isset($hiddenfields['city'])) {
 668                         $row->cells[1]->text .= $user->city;
 669                     }
 670                     if (!empty($countries[$user->country]) && !isset($hiddenfields['country'])) {
 671                         if ($user->city && !isset($hiddenfields['city'])) {
 672                             $row->cells[1]->text .= ', ';
 673                         }
 674                         $row->cells[1]->text .= $countries[$user->country];
 675                     }
 676                     $row->cells[1]->text .= '<br />';
 677                 }
 678
 679                 if (!isset($hiddenfields['lastaccess'])) {
 680                     if ($user->lastaccess) {
 681                         $row->cells[1]->text .= get_string('lastaccess').get_string('labelsep', 'langconfig').userdate($user->lastaccess);
 682                         $row->cells[1]->text .= '&nbsp; ('. format_time(time() - $user->lastaccess, $datestring) .')';
 683                     } else {
 684                         $row->cells[1]->text .= get_string('lastaccess').get_string('labelsep', 'langconfig').get_string('never');
 685                     }
 686                 }
 687
 688                 $row->cells[1]->text .= $OUTPUT->container_end();
 689
 690                 $row->cells[2] = new html_table_cell();
 691                 $row->cells[2]->attributes['class'] = 'links';
 692                 $row->cells[2]->text = '';
 693
 694                 $links = array();
 695
 696                 if ($CFG->enableblogs && ($CFG->bloglevel != BLOG_USER_LEVEL || $USER->id == $user->id)) {
 697                     $links[] = html_writer::link(new moodle_url('/blog/index.php?userid='.$user->id), get_string('blogs', 'blog'));
 698                 }
 699
 700                 if (!empty($CFG->enablenotes) and (has_capability('moodle/notes:manage', $context) || has_capability('moodle/notes:view', $context))) {
 701                     $links[] = html_writer::link(new moodle_url('/notes/index.php?course=' . $course->id. '&user='.$user->id), get_string('notes', 'notes'));
 702                 }
 703
 704                 if (has_capability('moodle/site:viewreports', $context) or has_capability('moodle/user:viewuseractivitiesreport', $usercontext)) {
 705                     $links[] = html_writer::link(new moodle_url('/course/user.php?id='. $course->id .'&user='. $user->id), get_string('activity'));
 706                 }
 707
 708                 if ($USER->id != $user->id && !\core\session\manager::is_loggedinas() && has_capability('moodle/user:loginas', $context) && !is_siteadmin($user->id)) {
 709                     $links[] = html_writer::link(new moodle_url('/course/loginas.php?id='. $course->id .'&user='. $user->id .'&sesskey='. sesskey()), get_string('loginas'));
 710                 }
 711
 712                 $links[] = html_writer::link(new moodle_url('/user/view.php?id='. $user->id .'&course='. $course->id), get_string('fullprofile') . '...');
 713
 714                 $row->cells[2]->text .= implode('', $links);
 715
 716                 if ($bulkoperations) {
 717                     $row->cells[2]->text .= '<br /><input type="checkbox" class="usercheckbox" name="user'.$user->id.'" /> ';
 718                 }
 719                 $table->data = array($row);
 720                 echo html_writer::table($table);
 721             }
 722
 723         } else {
 724             echo $OUTPUT->heading(get_string('nothingtodisplay'));
 725         }
 726     }
 727
 728 } else {
 729     $countrysort = (strpos($sort, 'country') !== false);
 730     $timeformat = get_string('strftimedate');
 731
 732
 733     if ($userlist) {
 734
 735         $usersprinted = array();
 736         foreach ($userlist as $user) {
 737             if (in_array($user->id, $usersprinted)) { // Prevent duplicates by r.hidden - MDL-13935.
 738                 continue;
 739             }
 740             $usersprinted[] = $user->id; // Add new user to the array of users printed.
 741
 742             context_helper::preload_from_record($user);
 743
 744             if ($user->lastaccess) {
 745                 $lastaccess = format_time(time() - $user->lastaccess, $datestring);
 746             } else {
 747                 $lastaccess = $strnever;
 748             }
 749
 750             if (empty($user->country)) {
 751                 $country = '';
 752
 753             } else {
 754                 if ($countrysort) {
 755                     $country = '('.$user->country.') '.$countries[$user->country];
 756                 } else {
 757                     $country = $countries[$user->country];
 758                 }
 759             }
 760
 761             $usercontext = context_user::instance($user->id);
 762
 763             if ($piclink = ($USER->id == $user->id || has_capability('moodle/user:viewdetails', $context) || has_capability('moodle/user:viewdetails', $usercontext))) {
 764                 $profilelink = '<strong><a href="'.$CFG->wwwroot.'/user/view.php?id='.$user->id.'&amp;course='.$course->id.'">'.fullname($user).'</a></strong>';
 765             } else {
 766                 $profilelink = '<strong>'.fullname($user).'</strong>';
 767             }
 768
 769             $data = array();
 770             if ($bulkoperations) {
 771                 $data[] = '<input type="checkbox" class="usercheckbox" name="user'.$user->id.'" />';
 772             }
 773             $data[] = $OUTPUT->user_picture($user, array('size' => 35, 'courseid' => $course->id));
 774             $data[] = $profilelink;
 775
 776             if ($mode === MODE_BRIEF) {
 777                 foreach ($extrafields as $field) {
 778                     $data[] = $user->{$field};
 779                 }
 780             }
 781             if ($mode === MODE_BRIEF && !isset($hiddenfields['city'])) {
 782                 $data[] = $user->city;
 783             }
 784             if ($mode === MODE_BRIEF && !isset($hiddenfields['country'])) {
 785                 $data[] = $country;
 786             }
 787             if (!isset($hiddenfields['lastaccess'])) {
 788                 $data[] = $lastaccess;
 789             }
 790
 791             $table->add_data($data);
 792         }
 793     }
 794
 795     $table->print_html();
 796
 797 }
 798
 799 if ($bulkoperations) {
 800     echo '<br /><div class="buttons">';
 801     echo '<input type="button" id="checkall" value="'.get_string('selectall').'" /> ';
 802     echo '<input type="button" id="checknone" value="'.get_string('deselectall').'" /> ';
 803     $displaylist = array();
 804     $displaylist['messageselect.php'] = get_string('messageselectadd');
 805     if (!empty($CFG->enablenotes) && has_capability('moodle/notes:manage', $context) && $context->id != $frontpagectx->id) {
 806         $displaylist['addnote.php'] = get_string('addnewnote', 'notes');
 807         $displaylist['groupaddnote.php'] = get_string('groupaddnewnote', 'notes');
 808     }
 809
 810     echo $OUTPUT->help_icon('withselectedusers');
 811     echo html_writer::tag('label', get_string("withselectedusers"), array('for' => 'formactionid'));
 812     echo html_writer::select($displaylist, 'formaction', '', array('' => 'choosedots'), array('id' => 'formactionid'));
 813
 814     echo '<input type="hidden" name="id" value="'.$course->id.'" />';
 815     echo '<noscript style="display:inline">';
 816     echo '<div><input type="submit" value="'.get_string('ok').'" /></div>';
 817     echo '</noscript>';
 818     echo '</div></div>';
 819     echo '</form>';
 820
 821     $module = array('name' => 'core_user', 'fullpath' => '/user/module.js');
 822     $PAGE->requires->js_init_call('M.core_user.init_participation', null, false, $module);
 823 }
 824
 825 // Show a search box if all participants don't fit on a single screen.
 826 if ($totalcount > $perpage) {
 827     echo '<form action="index.php" class="searchform"><div><input type="hidden" name="id" value="'.$course->id.'" />';
 828     echo '<label for="search">' . get_string('search', 'search') . ' </label>';
 829     echo '<input type="text" id="search" name="search" value="'.s($search).'" />&nbsp;<input type="submit" value="'.get_string('search').'" /></div></form>'."\n";
 830 }
 831
 832 $perpageurl = clone($baseurl);
 833 $perpageurl->remove_params('perpage');
 834 if ($perpage == SHOW_ALL_PAGE_SIZE) {
 835     $perpageurl->param('perpage', DEFAULT_PAGE_SIZE);
 836     echo $OUTPUT->container(html_writer::link($perpageurl, get_string('showperpage', '', DEFAULT_PAGE_SIZE)), array(), 'showall');
 837
 838 } else if ($matchcount > 0 && $perpage < $matchcount) {
 839     $perpageurl->param('perpage', SHOW_ALL_PAGE_SIZE);
 840     echo $OUTPUT->container(html_writer::link($perpageurl, get_string('showall', '', $matchcount)), array(), 'showall');
 841 }
 842
 843 echo '</div>';  // Userlist.
 844
 845 echo $OUTPUT->footer();
 846
 847 if ($userlist) {
 848     $userlist->close();
 849 }
 850
 851 /**
 852  * Returns SQL that can be used to limit a query to a period where the user last accessed a course..
 853  *
 854  * @param string $accesssince
 855  * @return string
 856  */
 857 function get_course_lastaccess_sql($accesssince='') {
 858     if (empty($accesssince)) {
 859         return '';
 860     }
 861     if ($accesssince == -1) { // Never.
 862         return 'ul.timeaccess = 0';
 863     } else {
 864         return 'ul.timeaccess != 0 AND ul.timeaccess < '.$accesssince;
 865     }
 866 }
 867
 868 /**
 869  * Returns SQL that can be used to limit a query to a period where the user last accessed the system.
 870  *
 871  * @param string $accesssince
 872  * @return string
 873  */
 874 function get_user_lastaccess_sql($accesssince='') {
 875     if (empty($accesssince)) {
 876         return '';
 877     }
 878     if ($accesssince == -1) { // Never.
 879         return 'u.lastaccess = 0';
 880     } else {
 881         return 'u.lastaccess != 0 AND u.lastaccess < '.$accesssince;
 882     }
 883 }