/**
  * Outputs the user menu.
  * @return custom_menu object
  */
 public function custom_menu_user()
 {
     // Die if executed during install.
     if (during_initial_install()) {
         return false;
     }
     global $USER, $CFG, $DB;
     $loginurl = get_login_url();
     $usermenu = html_writer::start_tag('ul', array('class' => 'nav'));
     $usermenu .= html_writer::start_tag('li', array('class' => 'dropdown'));
     if (!isloggedin()) {
         if ($this->page->pagelayout != 'login') {
             $userpic = '<em><i class="fa fa-sign-in"></i>' . get_string('login') . '</em>';
             $usermenu .= html_writer::link($loginurl, $userpic, array('class' => 'loginurl'));
         }
     } else {
         if (isguestuser()) {
             $userurl = new moodle_url('#');
             $userpic = parent::user_picture($USER, array('link' => false));
             $caret = '<i class="fa fa-caret-right"></i>';
             $userclass = array('class' => 'dropdown-toggle', 'data-toggle' => 'dropdown');
             $usermenu .= html_writer::link($userurl, $userpic . get_string('guest') . $caret, $userclass);
             // Render direct logout link.
             $usermenu .= html_writer::start_tag('ul', array('class' => 'dropdown-menu pull-right'));
             $branchlabel = '<em><i class="fa fa-sign-out"></i>' . get_string('logout') . '</em>';
             $branchurl = new moodle_url('/login/logout.php');
             $branchurl->param('sesskey', sesskey());
             $usermenu .= html_writer::tag('li', html_writer::link($branchurl, $branchlabel));
             // Render Help Link.
             $usermenu .= $this->theme_essential_render_helplink();
             $usermenu .= html_writer::end_tag('ul');
         } else {
             $course = $this->page->course;
             $context = context_course::instance($course->id);
             // Output Profile link.
             $userurl = new moodle_url('#');
             $userpic = parent::user_picture($USER, array('link' => false));
             $caret = '<i class="fa fa-caret-right"></i>';
             $userclass = array('class' => 'dropdown-toggle', 'data-toggle' => 'dropdown');
             if (!empty($USER->alternatename)) {
                 $usermenu .= html_writer::link($userurl, $userpic . $USER->alternatename . $caret, $userclass);
             } else {
                 $usermenu .= html_writer::link($userurl, $userpic . $USER->firstname . $caret, $userclass);
             }
             // Start dropdown menu items.
             $usermenu .= html_writer::start_tag('ul', array('class' => 'dropdown-menu pull-right'));
             if (\core\session\manager::is_loggedinas()) {
                 $realuser = \core\session\manager::get_realuser();
                 $branchlabel = '<em><i class="fa fa-key"></i>' . fullname($realuser, true) . get_string('loggedinas', 'theme_essential') . fullname($USER, true) . '</em>';
             } else {
                 $branchlabel = '<em><i class="fa fa-user"></i>' . fullname($USER, true) . '</em>';
             }
             $branchurl = new moodle_url('/user/profile.php', array('id' => $USER->id));
             $usermenu .= html_writer::tag('li', html_writer::link($branchurl, $branchlabel));
             if (is_mnet_remote_user($USER) && ($idprovider = $DB->get_record('mnet_host', array('id' => $USER->mnethostid)))) {
                 $branchlabel = '<em><i class="fa fa-users"></i>' . get_string('loggedinfrom', 'theme_essential') . $idprovider->name . '</em>';
                 $branchurl = new moodle_url($idprovider->wwwroot);
                 $usermenu .= html_writer::tag('li', html_writer::link($branchurl, $branchlabel));
             }
             if (is_role_switched($course->id)) {
                 // Has switched roles.
                 $branchlabel = '<em><i class="fa fa-users"></i>' . get_string('switchrolereturn') . '</em>';
                 $branchurl = new moodle_url('/course/switchrole.php', array('id' => $course->id, 'sesskey' => sesskey(), 'switchrole' => 0, 'returnurl' => $this->page->url->out_as_local_url(false)));
                 $usermenu .= html_writer::tag('li', html_writer::link($branchurl, $branchlabel));
             }
             // Add preferences submenu.
             $usermenu .= $this->theme_essential_render_preferences($context);
             $usermenu .= html_writer::empty_tag('hr', array('class' => 'sep'));
             // Output Calendar link if user is allowed to edit own calendar entries.
             if (has_capability('moodle/calendar:manageownentries', $context)) {
                 $branchlabel = '<em><i class="fa fa-calendar"></i>' . get_string('pluginname', 'block_calendar_month') . '</em>';
                 $branchurl = new moodle_url('/calendar/view.php');
                 $usermenu .= html_writer::tag('li', html_writer::link($branchurl, $branchlabel));
             }
             // Check if messaging is enabled.
             if (!empty($CFG->messaging)) {
                 $branchlabel = '<em><i class="fa fa-envelope"></i>' . get_string('pluginname', 'block_messages') . '</em>';
                 $branchurl = new moodle_url('/message/index.php');
                 $usermenu .= html_writer::tag('li', html_writer::link($branchurl, $branchlabel));
             }
             // Check if user is allowed to manage files.
             if (has_capability('moodle/user:manageownfiles', $context)) {
                 $branchlabel = '<em><i class="fa fa-file"></i>' . get_string('privatefiles', 'block_private_files') . '</em>';
                 $branchurl = new moodle_url('/user/files.php');
                 $usermenu .= html_writer::tag('li', html_writer::link($branchurl, $branchlabel));
             }
             // Check if user is allowed to view discussions.
             if (has_capability('mod/forum:viewdiscussion', $context)) {
                 $branchlabel = '<em><i class="fa fa-list-alt"></i>' . get_string('forumposts', 'mod_forum') . '</em>';
                 $branchurl = new moodle_url('/mod/forum/user.php', array('id' => $USER->id));
                 $usermenu .= html_writer::tag('li', html_writer::link($branchurl, $branchlabel));
                 $branchlabel = '<em><i class="fa fa-list"></i>' . get_string('discussions', 'mod_forum') . '</em>';
                 $branchurl = new moodle_url('/mod/forum/user.php', array('id' => $USER->id, 'mode' => 'discussions'));
                 $usermenu .= html_writer::tag('li', html_writer::link($branchurl, $branchlabel));
                 $usermenu .= html_writer::empty_tag('hr', array('class' => 'sep'));
             }
             // Output user grade links course sensitive, workaround for frontpage, selecting first enrolled course.
             if ($course->id == SITEID) {
                 $branchlabel = '<em><i class="fa fa-list-alt"></i>' . get_string('mygrades', 'theme_essential') . '</em>';
                 $branchurl = new moodle_url('/grade/report/overview/index.php', array('id' => $course->id, 'userid' => $USER->id));
                 $usermenu .= html_writer::tag('li', html_writer::link($branchurl, $branchlabel));
             } else {
                 if (has_capability('gradereport/overview:view', $context)) {
                     $branchlabel = '<em><i class="fa fa-list-alt"></i>' . get_string('mygrades', 'theme_essential') . '</em>';
                     $branchurl = new moodle_url('/grade/report/overview/index.php', array('id' => $course->id, 'userid' => $USER->id));
                     $usermenu .= html_writer::tag('li', html_writer::link($branchurl, $branchlabel));
                 }
                 if (has_capability('gradereport/user:view', $context)) {
                     // In Course also output Course grade links.
                     $branchlabel = '<em><i class="fa fa-list-alt"></i>' . get_string('coursegrades', 'theme_essential') . '</em>';
                     $branchurl = new moodle_url('/grade/report/user/index.php', array('id' => $course->id, 'userid' => $USER->id));
                     $usermenu .= html_writer::tag('li', html_writer::link($branchurl, $branchlabel));
                 }
             }
             // Check if badges are enabled.
             if (!empty($CFG->enablebadges) && has_capability('moodle/badges:manageownbadges', $context)) {
                 $branchlabel = '<em><i class="fa fa-certificate"></i>' . get_string('badges') . '</em>';
                 $branchurl = new moodle_url('/badges/mybadges.php');
                 $usermenu .= html_writer::tag('li', html_writer::link($branchurl, $branchlabel));
             }
             $usermenu .= html_writer::empty_tag('hr', array('class' => 'sep'));
             // Render direct logout link.
             $branchlabel = '<em><i class="fa fa-sign-out"></i>' . get_string('logout') . '</em>';
             if (\core\session\manager::is_loggedinas()) {
                 $branchurl = new moodle_url('/course/loginas.php', array('id' => $course->id, 'sesskey' => sesskey()));
             } else {
                 $branchurl = new moodle_url('/login/logout.php', array('sesskey' => sesskey()));
             }
             $usermenu .= html_writer::tag('li', html_writer::link($branchurl, $branchlabel));
             // Render Help Link.
             $usermenu .= $this->theme_essential_render_helplink();
             $usermenu .= html_writer::end_tag('ul');
         }
     }
     $usermenu .= html_writer::end_tag('li');
     $usermenu .= html_writer::end_tag('ul');
     return $usermenu;
 }