/**
  * Initialise the iterator
  *
  * @return boolean success
  */
 public function init()
 {
     global $CFG, $DB;
     $this->close();
     export_verify_grades($this->course->id);
     $course_item = grade_item::fetch_course_item($this->course->id);
     if ($course_item->needsupdate) {
         // Can not calculate all final grades - sorry.
         return false;
     }
     $coursecontext = context_course::instance($this->course->id);
     list($relatedctxsql, $relatedctxparams) = $DB->get_in_or_equal($coursecontext->get_parent_context_ids(true), SQL_PARAMS_NAMED, 'relatedctx');
     list($gradebookroles_sql, $params) = $DB->get_in_or_equal(explode(',', $CFG->gradebookroles), SQL_PARAMS_NAMED, 'grbr');
     list($enrolledsql, $enrolledparams) = get_enrolled_sql($coursecontext, '', 0, $this->onlyactive);
     $params = array_merge($params, $enrolledparams, $relatedctxparams);
     if ($this->groupid) {
         $groupsql = "INNER JOIN {groups_members} gm ON gm.userid = u.id";
         $groupwheresql = "AND gm.groupid = :groupid";
         // $params contents: gradebookroles
         $params['groupid'] = $this->groupid;
     } else {
         $groupsql = "";
         $groupwheresql = "";
     }
     if (empty($this->sortfield1)) {
         // We must do some sorting even if not specified.
         $ofields = ", u.id AS usrt";
         $order = "usrt ASC";
     } else {
         $ofields = ", u.{$this->sortfield1} AS usrt1";
         $order = "usrt1 {$this->sortorder1}";
         if (!empty($this->sortfield2)) {
             $ofields .= ", u.{$this->sortfield2} AS usrt2";
             $order .= ", usrt2 {$this->sortorder2}";
         }
         if ($this->sortfield1 != 'id' and $this->sortfield2 != 'id') {
             // User order MUST be the same in both queries,
             // must include the only unique user->id if not already present.
             $ofields .= ", u.id AS usrt";
             $order .= ", usrt ASC";
         }
     }
     $userfields = 'u.*';
     $customfieldssql = '';
     if ($this->allowusercustomfields && !empty($CFG->grade_export_customprofilefields)) {
         $customfieldscount = 0;
         $customfieldsarray = grade_helper::get_user_profile_fields($this->course->id, $this->allowusercustomfields);
         foreach ($customfieldsarray as $field) {
             if (!empty($field->customid)) {
                 $customfieldssql .= "\n                            LEFT JOIN (SELECT * FROM {user_info_data}\n                                WHERE fieldid = :cf{$customfieldscount}) cf{$customfieldscount}\n                            ON u.id = cf{$customfieldscount}.userid";
                 $userfields .= ", cf{$customfieldscount}.data AS customfield_{$field->shortname}";
                 $params['cf' . $customfieldscount] = $field->customid;
                 $customfieldscount++;
             }
         }
     }
     $users_sql = "SELECT {$userfields} {$ofields}\n                        FROM {user} u\n                        JOIN ({$enrolledsql}) je ON je.id = u.id\n                             {$groupsql} {$customfieldssql}\n                        JOIN (\n                                  SELECT DISTINCT ra.userid\n                                    FROM {role_assignments} ra\n                                   WHERE ra.roleid {$gradebookroles_sql}\n                                     AND ra.contextid {$relatedctxsql}\n                             ) rainner ON rainner.userid = u.id\n                         WHERE u.deleted = 0\n                             {$groupwheresql}\n                    ORDER BY {$order}";
     $this->users_rs = $DB->get_recordset_sql($users_sql, $params);
     if (!$this->onlyactive) {
         $context = context_course::instance($this->course->id);
         $this->suspendedusers = get_suspended_userids($context);
     } else {
         $this->suspendedusers = array();
     }
     if (!empty($this->grade_items)) {
         $itemids = array_keys($this->grade_items);
         list($itemidsql, $grades_params) = $DB->get_in_or_equal($itemids, SQL_PARAMS_NAMED, 'items');
         $params = array_merge($params, $grades_params);
         $grades_sql = "SELECT g.* {$ofields}\n                             FROM {grade_grades} g\n                             JOIN {user} u ON g.userid = u.id\n                             JOIN ({$enrolledsql}) je ON je.id = u.id\n                                  {$groupsql}\n                             JOIN (\n                                      SELECT DISTINCT ra.userid\n                                        FROM {role_assignments} ra\n                                       WHERE ra.roleid {$gradebookroles_sql}\n                                         AND ra.contextid {$relatedctxsql}\n                                  ) rainner ON rainner.userid = u.id\n                              WHERE u.deleted = 0\n                              AND g.itemid {$itemidsql}\n                              {$groupwheresql}\n                         ORDER BY {$order}, g.itemid ASC";
         $this->grades_rs = $DB->get_recordset_sql($grades_sql, $params);
     } else {
         $this->grades_rs = false;
     }
     return true;
 }

 /**
  * Return true is user is active user in course else false
  *
  * @param int $userid
  * @return bool true is user is active in course.
  */
 public function is_active_user($userid)
 {
     return !in_array($userid, get_suspended_userids($this->context, true));
 }

 /**
  * Return true is user is active user in course else false
  *
  * @param int $userid
  * @return bool true is user is active in course.
  */
 public function is_active_user($userid)
 {
     if (is_null($this->susers) && !is_null($this->context)) {
         $this->susers = get_suspended_userids($this->context);
     }
     return !in_array($userid, $this->susers);
 }

if ($mode === ROSTER_MODE_PRINT) {
    $PAGE->set_pagelayout('print');
} else {
    $PAGE->set_pagelayout('report');
}
$returnurl = new moodle_url('/course/view.php', array('id' => $id));

// Check permissions.
$coursecontext = context_course::instance($course->id);
require_capability('report/roster:view', $coursecontext);

// Get all the users.
$userlist = get_enrolled_users($coursecontext, '', $group, user_picture::fields('u', null, 0, 0, true));

// Get suspended users.
$suspended = get_suspended_userids($coursecontext);

$data = array();
foreach ($userlist as $user) {
    if (!in_array($user->id, $suspended)) {
        $item = $OUTPUT->user_picture($user, array('size' => 100, 'courseid' => $course->id));
        $item .= html_writer::tag('span', fullname($user));
        $data[] = $item;
    }
}

// Finish setting up page.
$PAGE->set_title($course->shortname .': '. get_string('roster' , 'report_roster'));
$PAGE->set_heading($course->fullname);
$PAGE->requires->yui_module('moodle-report_roster-roster', 'M.report_roster.init');
$PAGE->requires->strings_for_js(array(

 /**
  * @dataProvider get_enrolled_sql_provider
  */
 public function test_get_enrolled_sql_course($users, $counts)
 {
     global $DB;
     $this->resetAfterTest();
     $course = $this->getDataGenerator()->create_course();
     $context = context_course::instance($course->id);
     $student = $DB->get_record('role', array('shortname' => 'student'), '*', MUST_EXIST);
     $createdusers = array();
     foreach ($users as &$userdata) {
         $user = $this->getDataGenerator()->create_user();
         $userdata['id'] = $user->id;
         $timestart = 0;
         $timeend = 0;
         $status = null;
         if (isset($userdata['timestart'])) {
             $timestart = time() + $userdata['timestart'];
         }
         if (isset($userdata['timeend'])) {
             $timeend = time() + $userdata['timeend'];
         }
         if (isset($userdata['status'])) {
             $status = $userdata['status'];
         }
         // Enrol the user in the course.
         $this->getDataGenerator()->enrol_user($user->id, $course->id, $student->id, 'manual', $timestart, $timeend, $status);
     }
     // After all users have been enroled, check expectations.
     $enrolled = get_enrolled_users($context, '', 0, 'u.id', null, 0, 0, false);
     $active = get_enrolled_users($context, '', 0, 'u.id', null, 0, 0, true);
     $suspended = get_suspended_userids($context);
     foreach ($users as $userdata) {
         if (isset($userdata['enrolled']) && $userdata['enrolled']) {
             $this->assertTrue(isset($enrolled[$userdata['id']]));
         } else {
             $this->assertFalse(isset($enrolled[$userdata['id']]));
         }
         if (isset($userdata['active']) && $userdata['active']) {
             $this->assertTrue(isset($active[$userdata['id']]));
         } else {
             $this->assertFalse(isset($active[$userdata['id']]));
         }
         if (isset($userdata['suspended']) && $userdata['suspended']) {
             $this->assertTrue(isset($suspended[$userdata['id']]));
         } else {
             $this->assertFalse(isset($suspended[$userdata['id']]));
         }
     }
     $this->assertCount($counts['enrolled'], $enrolled);
     $this->assertCount($counts['active'], $active);
     $this->assertCount($counts['suspended'], $suspended);
 }

 function get_roster($onlyrole = null)
 {
     //edited below, replaced old method
     $coursecontext = context_course::instance($this->courseid);
     $allroles = get_roles_used_in_context($coursecontext);
     arsort($allroles);
     if (!$this->visible) {
         foreach ($allroles as $key => $role) {
             if ($role->shortname != 'editingteacher') {
                 unset($allroles[$key]);
             }
         }
     }
     $roles = array_keys($allroles);
     // can't used canned function as its likely to return a student role
     // when the user has both a student and a teacher role
     // so this bit will allow the lower roleid (higher value role) to overwrite the lower one
     foreach ($roles as $role) {
         $temp = get_role_users($role, $coursecontext, false, '', null, false);
         if ($temp !== false && sizeof($temp) !== 0) {
             if (isset($course->users)) {
                 $course->users = array_merge($course->users, $temp);
             } else {
                 $course = new stdclass();
                 $course->users = $temp;
             }
         }
     }
     $members = array();
     $suspended = get_suspended_userids($coursecontext);
     foreach ($course->users as $cuser) {
         if (array_key_exists($cuser->id, $suspended)) {
             unset($course->users[$cuser->id]);
         } else {
             if ($onlyrole === null || $onlyrole == $allroles[$cuser->roleid]->shortname) {
                 $members[strtolower($cuser->email)] = $allroles[$cuser->roleid]->shortname;
             }
         }
     }
     return $members;
 }

    print_error('nocourseid');
}
require_login($course);
$context = context_course::instance($course->id);
require_capability('gradereport/outcomes:view', $context);
// First make sure we have proper final grades.
grade_regrade_final_grades($courseid);
// Grab all outcomes used in course.
$report_info = array();
$outcomes = grade_outcome::fetch_all_available($courseid);
// Will exclude grades of suspended users if required.
$defaultgradeshowactiveenrol = !empty($CFG->grade_report_showonlyactiveenrol);
$showonlyactiveenrol = get_user_preferences('grade_report_showonlyactiveenrol', $defaultgradeshowactiveenrol);
$showonlyactiveenrol = $showonlyactiveenrol || !has_capability('moodle/course:viewsuspendedusers', $context);
if ($showonlyactiveenrol) {
    $suspendedusers = get_suspended_userids($context);
}
// Get grade_items that use each outcome.
foreach ($outcomes as $outcomeid => $outcome) {
    $report_info[$outcomeid]['items'] = $DB->get_records_select('grade_items', "outcomeid = ? AND courseid = ?", array($outcomeid, $courseid));
    $report_info[$outcomeid]['outcome'] = $outcome;
    // Get average grades for each item.
    if (is_array($report_info[$outcomeid]['items'])) {
        foreach ($report_info[$outcomeid]['items'] as $itemid => $item) {
            $params = array();
            $hidesuspendedsql = '';
            if ($showonlyactiveenrol && !empty($suspendedusers)) {
                list($notinusers, $params) = $DB->get_in_or_equal($suspendedusers, SQL_PARAMS_QM, null, false);
                $hidesuspendedsql = ' AND userid ' . $notinusers;
            }
            $params = array_merge(array($itemid), $params);

 function get_roster($onlyrole = null)
 {
     //edited below, replaced old method
     $coursecontext = context_course::instance($this->courseid);
     $allroles = get_roles_used_in_context($coursecontext);
     arsort($allroles);
     if (!$this->visible) {
         foreach ($allroles as $key => $role) {
             if ($role->shortname != 'editingteacher') {
                 unset($allroles[$key]);
             }
         }
     }
     $roles = array_keys($allroles);
     // can't used canned function as its likely to return a student role
     // when the user has both a student and a teacher role
     // so this bit will allow the lower roleid (higher value role) to overwrite the lower one
     foreach ($roles as $role) {
         $temp = get_role_users($role, $coursecontext, false, '', null, false);
         if ($temp !== false && sizeof($temp) !== 0) {
             if (isset($course->users)) {
                 $course->users = array_merge($course->users, $temp);
             } else {
                 $course = new stdclass();
                 $course->users = $temp;
             }
         }
     }
     $members = array();
     $suspended = get_suspended_userids($coursecontext);
     foreach ($course->users as $cuser) {
         if (array_key_exists($cuser->id, $suspended)) {
             /* Explanation of changes made: */
             //edited use of unset below: previous implementation wasn't working
             //because $cuser->id was a number larger than the size of
             //$course->users.
             //$course->users is an array of stdClass objects, which have their own IDs,
             //but those IDs could not be directly accessed in $course->users without callling on the $cuser object.
             //So the compiler was seeing $cuser->id as an index into the array $course->users
             //$cuser->id is normally too large to be used to index into $course->users
             //unset was not working because the index $cuser->id was out of range (larger than the size of $course->users)
             //
             ///*unset($course->users[$cuser->id]);*/
             //solution has been reimplemented below, and it should now work (hopefully)
             $deleteUser = array_search($cuser, $course->users);
             unset($course->users[$deleteUser]);
         } else {
             if ($onlyrole === null || $onlyrole == $allroles[$cuser->roleid]->shortname) {
                 $members[strtolower($cuser->email)] = $allroles[$cuser->roleid]->shortname;
             }
         }
     }
     return $members;
 }