server/settings/users.php

<?php
/**
 * Copyright (c) 2011, Robin Appelman <icewind1991@gmail.com>
 * This file is licensed under the Affero General Public License version 3 or later.
 * See the COPYING-README file.
 */

OC_Util::checkSubAdminUser();

// We have some javascript foo!
OC_Util::addScript('settings', 'users/deleteHandler');
OC_Util::addScript('settings', 'users/filter');
OC_Util::addScript( 'settings', 'users/users' );
OC_Util::addScript( 'settings', 'users/groups' );
OC_Util::addScript( 'core', 'multiselect' );
OC_Util::addScript( 'core', 'singleselect' );
OC_Util::addScript('core', 'jquery.inview');
OC_Util::addStyle( 'settings', 'settings' );
OC_App::setActiveNavigationEntry( 'core_users' );

$users = array();
$userManager = \OC_User::getManager();
$groupManager = \OC_Group::getManager();

$isAdmin = OC_User::isAdminUser(OC_User::getUser());

$groupsInfo = new \OC\Group\MetaData(OC_User::getUser(), $isAdmin, $groupManager);
$groupsInfo->setSorting($groupsInfo::SORT_USERCOUNT);
list($adminGroup, $groups) = $groupsInfo->get();

$recoveryAdminEnabled = OC_App::isEnabled('files_encryption') &&
					    OC_Appconfig::getValue( 'files_encryption', 'recoveryAdminEnabled' );

if($isAdmin) {
	$accessibleUsers = OC_User::getDisplayNames('', 30);
	$subadmins = OC_SubAdmin::getAllSubAdmins();
}else{
	$accessibleUsers = OC_Group::displayNamesInGroups($groups, '', 30);
	$subadmins = false;
}

// load preset quotas
$quotaPreset=OC_Appconfig::getValue('files', 'quota_preset', '1 GB, 5 GB, 10 GB');
$quotaPreset=explode(',', $quotaPreset);
foreach($quotaPreset as &$preset) {
	$preset=trim($preset);
}
$quotaPreset=array_diff($quotaPreset, array('default', 'none'));

$defaultQuota=OC_Appconfig::getValue('files', 'default_quota', 'none');
$defaultQuotaIsUserDefined=array_search($defaultQuota, $quotaPreset)===false
	&& array_search($defaultQuota, array('none', 'default'))===false;

// load users and quota
foreach($accessibleUsers as $uid => $displayName) {
	$quota=OC_Preferences::getValue($uid, 'files', 'quota', 'default');
	$isQuotaUserDefined=array_search($quota, $quotaPreset)===false
		&& array_search($quota, array('none', 'default'))===false;

	$name = $displayName;
	if ( $displayName !== $uid ) {
		$name = $name . ' ('.$uid.')';
	}

	$user = $userManager->get($uid);
	$users[] = array(
		"name" => $uid,
		"displayName" => $displayName,
		"groups" => OC_Group::getUserGroups($uid),
		'quota' => $quota,
		'isQuotaUserDefined' => $isQuotaUserDefined,
		'subadmin' => OC_SubAdmin::getSubAdminsGroups($uid),
		'storageLocation' => $user->getHome(),
		'lastLogin' => $user->getLastLogin(),
	);
}

$tmpl = new OC_Template( "settings", "users/main", "user" );
$tmpl->assign( 'users', $users );
$tmpl->assign( 'groups', $groups );
$tmpl->assign( 'adminGroup', $adminGroup );
$tmpl->assign( 'isAdmin', (int) $isAdmin);
$tmpl->assign( 'subadmins', $subadmins);
$tmpl->assign('usercount', count($users));
$tmpl->assign( 'numofgroups', count($groups) + count($adminGroup));
$tmpl->assign( 'quota_preset', $quotaPreset);
$tmpl->assign( 'default_quota', $defaultQuota);
$tmpl->assign( 'defaultQuotaIsUserDefined', $defaultQuotaIsUserDefined);
$tmpl->assign( 'recoveryAdminEnabled', $recoveryAdminEnabled);
$tmpl->assign( 'enableAvatars', \OC_Config::getValue('enable_avatars', true));
$tmpl->printPage();