class.ilObjUser.php

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<?php
/* Copyright (c) 1998-2009 ILIAS open source, Extended GPL, see docs/LICENSE */

define ("IL_PASSWD_PLAIN", "plain");
define ("IL_PASSWD_MD5", "md5");                        // ILIAS 3 Password
define ("IL_PASSWD_CRYPT", "crypt");            // ILIAS 2 Password


require_once "./Services/Object/classes/class.ilObject.php";
require_once './Services/User/exceptions/class.ilUserException.php'; 

class ilObjUser extends ilObject
{
        // personal data

        var $login;             // username in system

        var $passwd;    // password encoded in the format specified by $passwd_type
        var $passwd_type;
                                        // specifies the password format.
                                        // value: IL_PASSWD_PLAIN, IL_PASSWD_MD5 or IL_PASSWD_CRYPT.

                                        // Differences between password format in class ilObjUser and
                                        // in table usr_data:
                                        // Class ilObjUser supports three different password types
                                        // (plain, MD5 and CRYPT) and it uses the variables $passwd
                                        // and $passwd_type to store them.
                                        // Table usr_data supports only two different password types
                                        // (MD5 and CRYPT) and it uses the columns "passwd" and
                                        // "il2passwd" to store them.
                                        // The conversion between these two storage layouts is done
                                        // in the methods that perform SQL statements. All other
                                        // methods work exclusively with the $passwd and $passwd_type
                                        // variables.

        var $gender;    // 'm' or 'f'
        var $utitle;    // user title (keep in mind, that we derive $title from object also!)
        var $firstname;
        var $lastname;
        protected $birthday;
        var $fullname;  // title + firstname + lastname in one string
        //var $archive_dir = "./image";  // point to image file (should be flexible)
        // address data
        var $institution;
        var $department;
        var $street;
        var $city;
        var $zipcode;
        var $country;
        var $sel_country;
        var $phone_office;
        var $phone_home;
        var $phone_mobile;
        var $fax;
        var $email;
        var $hobby;
        var $matriculation;
        var $referral_comment;
        var $approve_date = null;
        var $agree_date = null;
        var $active;
        //var $ilinc_id; // unique Id for netucate ilinc service
        var $client_ip; // client ip to check before login
        var $auth_mode; // authentication mode

        var $im_icq;
        var $im_yahoo;
        var $im_msn;
        var $im_aim;
        var $im_skype;
        var $im_jabber;
        var $im_voip;

        var $delicious;
        var $latitude;
        var $longitude;
        var $loc_zoom;

        var $last_password_change_ts;
        var $login_attempts;

        var $user_defined_data = array();
        
        var $prefs;

        var $skin;


        var $default_role;

        var $ilias;

        static $is_desktop_item_loaded;
        static $is_desktop_item_cache;

        protected static $personal_image_cache = array();
        
        protected $inactivation_date = null;

        private $is_self_registered = false;

        function ilObjUser($a_user_id = 0, $a_call_by_reference = false)
        {
                global $ilias,$ilDB;

                // init variables
                $this->ilias =& $ilias;
                $this->db =& $ilDB;

                $this->type = "usr";
                $this->ilObject($a_user_id, $a_call_by_reference);
                $this->auth_mode = "default";
                $this->passwd_type = IL_PASSWD_PLAIN;

                // for gender selection. don't change this
                /*$this->gender = array(
                                                          'm'    => "salutation_m",
                                                          'f'    => "salutation_f"
                                                          );*/
                if ($a_user_id > 0)
                {
                        $this->setId($a_user_id);
                        $this->read();
                }
                else
                {
                        // TODO: all code in else-structure doesn't belongs in class user !!!
                        //load default data
                        $this->prefs = array();
                        //language
                        $this->prefs["language"] = $this->ilias->ini->readVariable("language","default");

                        //skin and pda support
                        $this->skin = $this->ilias->ini->readVariable("layout","skin");

                        $this->prefs["skin"] = $this->skin;
                        $this->prefs["show_users_online"] = "y";

                        //style (css)
                        $this->prefs["style"] = $this->ilias->ini->readVariable("layout","style");
                }
        }

        function read()
        {
                global $ilErr, $ilDB;

                // Alex: I have removed the JOIN to rbac_ua, since there seems to be no
                // use (3.11.0 alpha)
                /*$q = "SELECT * FROM usr_data ".
                         "LEFT JOIN rbac_ua ON usr_data.usr_id=rbac_ua.usr_id ".
                         "WHERE usr_data.usr_id= ".$ilDB->quote($this->id); */
                $r = $ilDB->queryF("SELECT * FROM usr_data ".
                         "WHERE usr_id= %s", array("integer"), array($this->id));

                if ($data = $ilDB->fetchAssoc($r))
                {
                        // convert password storage layout used by table usr_data into
                        // storage layout used by class ilObjUser
                        if ($data["passwd"] == "" && $data["i2passwd"] != "")
                        {
                                $data["passwd_type"] = IL_PASSWD_CRYPT;
                                $data["passwd"] = $data["i2passwd"];
                        }
                        else
                        {
                                $data["passwd_type"] = IL_PASSWD_MD5;
                                //$data["passwd"] = $data["passwd"]; (implicit)
                        }
                        unset($data["i2passw"]);

                        // this assign must not be set via $this->assignData($data)
                        // because this method will be called on profile updates and
                        // would set this values to 0, because they arent posted from form
                        $this->setLastPasswordChangeTS( $data['last_password_change'] );
                        $this->setLoginAttempts( $data['login_attempts'] );


                        // fill member vars in one shot
                        $this->assignData($data);

                        //get userpreferences from usr_pref table
                        $this->readPrefs();

                        //set language to default if not set
                        if ($this->prefs["language"] == "")
                        {
                                $this->prefs["language"] = $this->oldPrefs["language"];
                        }

                        //check skin-setting
                        include_once("./Services/Style/classes/class.ilStyleDefinition.php");
                        if ($this->prefs["skin"] == "" ||
                                !ilStyleDefinition::skinExists($this->prefs["skin"]))
                        {
                                $this->prefs["skin"] = $this->oldPrefs["skin"];
                        }

                        $this->skin = $this->prefs["skin"];

                        //check style-setting (skins could have more than one stylesheet
                        if ($this->prefs["style"] == "" ||
                                !ilStyleDefinition::skinExists($this->skin, $this->prefs["style"]))
                        {
                                //load default (css)
                                $this->prefs["style"] = $this->ilias->ini->readVariable("layout","style");
                        }

                        if (empty($this->prefs["hits_per_page"]))
                        {
                                $this->prefs["hits_per_page"] = 10;
                        }

                }
                else
                {
                        $ilErr->raiseError("<b>Error: There is no dataset with id ".
                                                           $this->id."!</b><br />class: ".get_class($this)."<br />Script: ".__FILE__.
                                                           "<br />Line: ".__LINE__, $ilErr->FATAL);
                }

                $this->readUserDefinedFields();

                parent::read();
        }

        function assignData($a_data)
        {
                global $ilErr, $ilDB, $lng;
                
                // basic personal data
                $this->setLogin($a_data["login"]);
                if (! $a_data["passwd_type"])
                {
                         $ilErr->raiseError("<b>Error: passwd_type missing in function assignData(). ".
                                                                $this->id."!</b><br />class: ".get_class($this)."<br />Script: "
                                                                .__FILE__."<br />Line: ".__LINE__, $ilErr->FATAL);
                }
                if ($a_data["passwd"] != "********" and strlen($a_data['passwd']))
                {
                        $this->setPasswd($a_data["passwd"], $a_data["passwd_type"]);
                }

                $this->setGender($a_data["gender"]);
                $this->setUTitle($a_data["title"]);
                $this->setFirstname($a_data["firstname"]);
                $this->setLastname($a_data["lastname"]);
                $this->setFullname();
                if (!is_array($a_data['birthday']))
                {
                        $this->setBirthday($a_data['birthday']);
                }
                else
                {
                        $this->setBirthday(null);
                }
                
                // address data
                $this->setInstitution($a_data["institution"]);
                $this->setDepartment($a_data["department"]);
                $this->setStreet($a_data["street"]);
                $this->setCity($a_data["city"]);
                $this->setZipcode($a_data["zipcode"]);
                $this->setCountry($a_data["country"]);
                $this->setSelectedCountry($a_data["sel_country"]);
                $this->setPhoneOffice($a_data["phone_office"]);
                $this->setPhoneHome($a_data["phone_home"]);
                $this->setPhoneMobile($a_data["phone_mobile"]);
                $this->setFax($a_data["fax"]);
                $this->setMatriculation($a_data["matriculation"]);
                $this->setEmail($a_data["email"]);
                $this->setHobby($a_data["hobby"]);
                $this->setClientIP($a_data["client_ip"]);

                // instant messenger data
                $this->setInstantMessengerId('icq',$a_data["im_icq"]);
                $this->setInstantMessengerId('yahoo',$a_data["im_yahoo"]);
                $this->setInstantMessengerId('msn',$a_data["im_msn"]);
                $this->setInstantMessengerId('aim',$a_data["im_aim"]);
                $this->setInstantMessengerId('skype',$a_data["im_skype"]);
                $this->setInstantMessengerId('jabber',$a_data["im_jabber"]);
                $this->setInstantMessengerId('voip',$a_data["im_voip"]);

                // other data
                $this->setDelicious($a_data["delicious"]);
                $this->setLatitude($a_data["latitude"]);
                $this->setLongitude($a_data["longitude"]);
                $this->setLocationZoom($a_data["loc_zoom"]);

                // system data
                $this->setLastLogin($a_data["last_login"]);
                $this->setLastUpdate($a_data["last_update"]);
                $this->create_date      = $a_data["create_date"];
        $this->setComment($a_data["referral_comment"]);
        $this->approve_date = $a_data["approve_date"];
        $this->active = $a_data["active"];
                $this->agree_date = $a_data["agree_date"];
                
                $this->setInactivationDate($a_data["inactivation_date"]);

        // time limitation
        $this->setTimeLimitOwner($a_data["time_limit_owner"]);
        $this->setTimeLimitUnlimited($a_data["time_limit_unlimited"]);
        $this->setTimeLimitFrom($a_data["time_limit_from"]);
        $this->setTimeLimitUntil($a_data["time_limit_until"]);
                $this->setTimeLimitMessage($a_data['time_limit_message']);

                // user profile incomplete?
                $this->setProfileIncomplete($a_data["profile_incomplete"]);

                //iLinc
                //$this->setiLincData($a_data['ilinc_id'],$a_data['ilinc_login'],$a_data['ilinc_passwd']);

                //authentication
                $this->setAuthMode($a_data['auth_mode']);
                $this->setExternalAccount($a_data['ext_account']);
                
                $this->setIsSelfRegistered((bool)$a_data['is_self_registered']);
        }

        function saveAsNew($a_from_formular = true)
        { 
                global $ilErr, $ilDB, $ilSetting, $ilUser;

                switch ($this->passwd_type)
                {
                        case IL_PASSWD_PLAIN:
                                $pw_field = "passwd";
                                if(strlen($this->passwd))
                                {
                                        $pw_value = md5($this->passwd); 
                                }
                                else
                                {
                                        $pw_value = $this->passwd;
                                }
                                break;

                        case IL_PASSWD_MD5:
                                $pw_field = "passwd";
                                $pw_value = $this->passwd;
                                break;

                        case IL_PASSWD_CRYPT:
                                $pw_field = "i2passwd";
                                $pw_value = $this->passwd;
                                break;

                        default :
                                 $ilErr->raiseError("<b>Error: passwd_type missing in function saveAsNew. ".
                                                                        $this->id."!</b><br />class: ".get_class($this)."<br />Script: ".__FILE__.
                                                                        "<br />Line: ".__LINE__, $ilErr->FATAL);
                }

                if( !$this->active )
                {
                        $this->setInactivationDate( ilUtil::now() );
                }
                else
                {
                        $this->setInactivationDate(null);
                }

                $insert_array = array(
                        "usr_id" => array("integer", $this->id),
                        "login" => array("text", $this->login),
                        $pw_field => array("text", $pw_value),
                        "firstname" => array("text", $this->firstname),
                        "lastname" => array("text", $this->lastname),
                        "title" => array("text", $this->utitle),
                        "gender" => array("text", $this->gender),
                        "email" => array("text", trim($this->email)),
                        "hobby" => array("text", (string) $this->hobby),
                        "institution" => array("text", $this->institution),
                        "department" => array("text", $this->department),
                        "street" => array("text", $this->street),
                        "city" => array("text", $this->city),
                        "zipcode" => array("text", $this->zipcode),
                        "country" => array("text", $this->country),
                        "sel_country" => array("text", $this->sel_country),
                        "phone_office" => array("text", $this->phone_office),
                        "phone_home" => array("text", $this->phone_home),
                        "phone_mobile" => array("text", $this->phone_mobile),
                        "fax" => array("text", $this->fax),
                        "birthday" => array('date', $this->getBirthday()),
                        "last_login" => array("timestamp", null),
                        "last_update" => array("timestamp", ilUtil::now()),
                        "create_date" => array("timestamp", ilUtil::now()),
                        "referral_comment" => array("text", $this->referral_comment),
                        "matriculation" => array("text", $this->matriculation),
                        "client_ip" => array("text", $this->client_ip),
                        "approve_date" => array("timestamp", $this->approve_date),
                        "agree_date" => array("timestamp", $this->agree_date),
                        "active" => array("integer", (int) $this->active),
                        "time_limit_unlimited" => array("integer", $this->getTimeLimitUnlimited()),
                        "time_limit_until" => array("integer", $this->getTimeLimitUntil()),
                        "time_limit_from" => array("integer", $this->getTimeLimitFrom()),
                        "time_limit_owner" => array("integer", $this->getTimeLimitOwner()),
                        "auth_mode" => array("text", $this->getAuthMode()),
                        "ext_account" => array("text", $this->getExternalAccount()),
                        "profile_incomplete" => array("integer", $this->getProfileIncomplete()),
                        "im_icq" => array("text", $this->im_icq),
                        "im_yahoo" => array("text", $this->im_yahoo),
                        "im_msn" => array("text", $this->im_msn),
                        "im_aim" => array("text", $this->im_aim),
                        "im_skype" => array("text", $this->im_skype),
                        "delicious" => array("text", $this->delicious),
                        "latitude" => array("text", $this->latitude),
                        "longitude" => array("text", $this->longitude),
                        "loc_zoom" => array("integer", (int) $this->loc_zoom),
                        "last_password_change" => array("integer", (int) $this->last_password_change_ts),
                        "im_jabber" => array("text", $this->im_jabber),
                        "im_voip" => array("text", $this->im_voip),
                        'inactivation_date' => array('timestamp', $this->inactivation_date),
                        'is_self_registered' => array('integer', (int)$this->is_self_registered)
                        );
                $ilDB->insert("usr_data", $insert_array);

                // add new entry in usr_defined_data
                $this->addUserDefinedFieldEntry();
                // ... and update
                $this->updateUserDefinedFields();

                // CREATE ENTRIES FOR MAIL BOX
                include_once ("Services/Mail/classes/class.ilMailbox.php");
                $mbox = new ilMailbox($this->id);
                $mbox->createDefaultFolder();

                include_once "Services/Mail/classes/class.ilMailOptions.php";
                $mail_options = new ilMailOptions($this->id);
                $mail_options->createMailOptionsEntry();

                // create personal bookmark folder tree
                include_once "./Services/Bookmarks/classes/class.ilBookmarkFolder.php";
                $bmf = new ilBookmarkFolder(0, $this->id);
                $bmf->createNewBookmarkTree();
        }

        function update()
        {
                global $ilErr, $ilDB, $ilAppEventHandler;

        $this->syncActive();

                if( $this->getStoredActive($this->id) && !$this->active )
                {
                        $this->setInactivationDate( ilUtil::now() );
                }
                else if($this->active)
                {
                        $this->setInactivationDate(null);
                }

                $update_array = array(
                        "gender" => array("text", $this->gender),
                        "title" => array("text", $this->utitle),
                        "firstname" => array("text", $this->firstname),
                        "lastname" => array("text", $this->lastname),
                        "email" => array("text", trim($this->email)),
                        "birthday" => array('date', $this->getBirthday()),
                        "hobby" => array("text", $this->hobby),
                        "institution" => array("text", $this->institution),
                        "department" => array("text", $this->department),
                        "street" => array("text", $this->street),
                        "city" => array("text", $this->city),
                        "zipcode" => array("text", $this->zipcode),
                        "country" => array("text", $this->country),
                        "sel_country" => array("text", $this->sel_country),
                        "phone_office" => array("text", $this->phone_office),
                        "phone_home" => array("text", $this->phone_home),
                        "phone_mobile" => array("text", $this->phone_mobile),
                        "fax" => array("text", $this->fax),
                        "referral_comment" => array("text", $this->referral_comment),
                        "matriculation" => array("text", $this->matriculation),
                        "client_ip" => array("text", $this->client_ip),
                        "approve_date" => array("timestamp", $this->approve_date),
                        "active" => array("integer", $this->active),
                        "time_limit_unlimited" => array("integer", $this->getTimeLimitUnlimited()),
                        "time_limit_until" => array("integer", $this->getTimeLimitUntil()),
                        "time_limit_from" => array("integer", $this->getTimeLimitFrom()),
                        "time_limit_owner" => array("integer", $this->getTimeLimitOwner()),
                        "time_limit_message" => array("integer", $this->getTimeLimitMessage()),
                        "profile_incomplete" => array("integer", $this->getProfileIncomplete()),
                        "auth_mode" => array("text", $this->getAuthMode()),
                        "ext_account" => array("text", $this->getExternalAccount()),
                        "im_icq" => array("text", $this->im_icq),
                        "im_yahoo" => array("text", $this->im_yahoo),
                        "im_msn" => array("text", $this->im_msn),
                        "im_aim" => array("text", $this->im_aim),
                        "im_skype" => array("text", $this->im_skype),
                        "delicious" => array("text", $this->delicious),
                        "latitude" => array("text", $this->latitude),
                        "longitude" => array("text", $this->longitude),
                        "loc_zoom" => array("integer", (int) $this->loc_zoom),
                        "last_password_change" => array("integer", $this->last_password_change_ts),
                        "im_jabber" => array("text", $this->im_jabber),
                        "im_voip" => array("text", $this->im_voip),
                        "last_update" => array("timestamp", ilUtil::now()),
                        'inactivation_date' => array('timestamp', $this->inactivation_date)
                        );
                        
        if (isset($this->agree_date) && (strtotime($this->agree_date) !== false || $this->agree_date == null))
        {
            $update_array["agree_date"] = array("timestamp", $this->agree_date);
                }
                switch ($this->passwd_type)
                {
                        case IL_PASSWD_PLAIN:
                                if(strlen($this->passwd))
                                {
                                        $update_array["i2passwd"] = array("text", (string) "");
                                        $update_array["passwd"] = array("text", (string) md5($this->passwd));
                                }
                                else
                                {
                                        $update_array["i2passwd"] = array("text", (string) "");
                                        $update_array["passwd"] = array("text", (string) $this->passwd);
                                }
                                break;

                        case IL_PASSWD_MD5:
                                $update_array["i2passwd"] = array("text", (string) "");
                                $update_array["passwd"] = array("text", (string) $this->passwd);
                                break;

                        case IL_PASSWD_CRYPT:
                                $update_array["i2passwd"] = array("text", (string) $this->passwd);
                                $update_array["passwd"] = array("text", (string) "");
                                break;

                        default :
                                $ilErr->raiseError("<b>Error: passwd_type missing in function update()".$this->id."!</b><br />class: ".
                                                                   get_class($this)."<br />Script: ".__FILE__."<br />Line: ".__LINE__, $ilErr->FATAL);
                }

                $ilDB->update("usr_data", $update_array, array("usr_id" => array("integer", $this->id)));

                $this->writePrefs();

                // update user defined fields
                $this->updateUserDefinedFields();

                parent::update();
        parent::updateOwner();

                $this->read();
                
                $ilAppEventHandler->raise("Services/User", "afterUpdate",
                        array("user_obj" => $this));

                return true;
        }

        function writeAccepted()
        {
                global $ilDB;

                $ilDB->manipulateF("UPDATE usr_data SET agree_date = ".$ilDB->now().
                         " WHERE usr_id = %s", array("integer"), array($this->getId()));
        }

        private function _lookup($a_user_id, $a_field)
        {
                global $ilDB;
                
                $res = $ilDB->queryF("SELECT ".$a_field." FROM usr_data WHERE usr_id = %s",
                        array("integer"), array($a_user_id));

                while($set = $ilDB->fetchAssoc($res))
                {
                        return $set[$a_field];
                }
                return false;
        }
        
        function _lookupFullname($a_user_id)
        {
                global $ilDB;
                
                $set = $ilDB->queryF("SELECT title, firstname, lastname FROM usr_data WHERE usr_id = %s",
                        array("integer"), array($a_user_id));

                if ($rec = $ilDB->fetchAssoc($set))
                {
                        if ($rec["title"])
                        {
                                $fullname = $rec["title"]." ";
                        }
                        if ($rec["firstname"])
                        {
                                $fullname .= $rec["firstname"]." ";
                        }
                        if ($rec["lastname"])
                        {
                                $fullname .= $rec["lastname"];
                        }
                }
                return $fullname;
        }
        
        function _lookupIm($a_user_id, $a_type)
        {
                return ilObjUser::_lookup($a_user_id, "im_".$a_type);
        }
        
        
        function _lookupEmail($a_user_id)
        {
                return ilObjUser::_lookup($a_user_id, "email");
        }

        public static function _lookupGender($a_user_id)
        {
                return ilObjUser::_lookup($a_user_id, "gender");
        }

        function _lookupClientIP($a_user_id)
        {
                return ilObjUser::_lookup($a_user_id, "client_ip");
        }


        public static function _lookupName($a_user_id)
        {
                global $ilDB;

                $res = $ilDB->queryF("SELECT firstname, lastname, title, login FROM usr_data WHERE usr_id = %s",
                        array("integer"), array($a_user_id));
                $user_rec = $ilDB->fetchAssoc($res);
                return array("user_id" => $a_user_id,
                        "firstname" => $user_rec["firstname"],
                        "lastname" => $user_rec["lastname"],
                        "title" => $user_rec["title"],
                        "login" => $user_rec["login"]);
        }

        function _lookupFields($a_user_id)
        {
                global $ilDB;

                $res = $ilDB->queryF("SELECT * FROM usr_data WHERE usr_id = %s",
                        array("integer"), array($a_user_id));
                $user_rec = $ilDB->fetchAssoc($res);
                return $user_rec;
        }

        function _lookupLogin($a_user_id)
        {
                return ilObjUser::_lookup($a_user_id, "login");
        }

        function _lookupExternalAccount($a_user_id)
        {
                return ilObjUser::_lookup($a_user_id, "ext_account");
        }

        public static function _lookupId($a_user_str)
        {
                global $ilDB;

                $res = $ilDB->queryF("SELECT usr_id FROM usr_data WHERE login = %s",
                        array("text"), array($a_user_str));
                $user_rec = $ilDB->fetchAssoc($res);
                return $user_rec["usr_id"];
        }

        function _lookupLastLogin($a_user_id)
        {
                return ilObjUser::_lookup($a_user_id, "last_login");
        }


        function refreshLogin()
        {
                global $ilDB;

                $ilDB->manipulateF("UPDATE usr_data SET ".
                         "last_login = ".$ilDB->now().
                         " WHERE usr_id = %s",
                         array("integer"), array($this->id));
        }

        function replacePassword($new_md5)
        {
                global $ilDB;

                $this->passwd_type = IL_PASSWD_MD5;
                $this->passwd = $new_md5;

                $ilDB->manipulateF("UPDATE usr_data SET ".
                         "passwd = %s ".
                         "WHERE usr_id = %s",
                         array("text", "integer"), array($this->passwd, $this->id));

                return true;
        }

        function updatePassword($a_old, $a_new1, $a_new2)
        {
                global $ilDB;

                if (func_num_args() != 3)
                {
                        return false;
                }

                if (!isset($a_old) or !isset($a_new1) or !isset($a_new2))
                {
                        return false;
                }

                if ($a_new1 != $a_new2)
                {
                        return false;
                }

                // is catched by isset() ???
                if ($a_new1 == "" || $a_old == "")
                {
                        return false;
                }

                //check old password
                switch ($this->passwd_type)
                {
                        case IL_PASSWD_PLAIN:
                                if ($a_old != $this->passwd)
                                {
                                        return false;
                                }
                                break;

                        case IL_PASSWD_MD5:
                                if (md5($a_old) != $this->passwd)
                                {
                                        return false;
                                }
                                break;

                        case IL_PASSWD_CRYPT:
                                if (self::_makeIlias2Password($a_old) != $this->passwd)
                                {
                                        return false;
                                }
                                break;
                }

                //update password
                $this->passwd = md5($a_new1);
                $this->passwd_type = IL_PASSWD_MD5;

                $ilDB->manipulateF("UPDATE usr_data SET ".
                         "passwd = %s ".
                         "WHERE usr_id = %s",
                         array("text", "integer"), array($this->passwd, $this->id));

                return true;
        }

        function resetPassword($a_new1, $a_new2)
        {
                global $ilDB;

                if (func_num_args() != 2)
                {
                        return false;
                }

                if (!isset($a_new1) or !isset($a_new2))
                {
                        return false;
                }

                if ($a_new1 != $a_new2)
                {
                        return false;
                }

                //update password
                $this->passwd = md5($a_new1);
                $this->passwd_type = IL_PASSWD_MD5;

                $ilDB->manipulateF("UPDATE usr_data SET ".
                         "passwd = %s ".
                         "WHERE usr_id = %s",
                         array("text", "integer"),
                         array($this->passwd, $this->id));

                return true;
        }

        public static function _makeIlias2Password($a_passwd)
        {
                return (crypt($a_passwd,substr($a_passwd,0,2)));
        }

        public static function _doesLoginnameExistInHistory($a_login)
        {
                global $ilDB;
                        
                $res = $ilDB->queryF('
                        SELECT * FROM loginname_history
                        WHERE login = %s',
                        array('text'), array($a_login));

                return $ilDB->fetchAssoc($res) ? true : false;
        }
        
        public static function _getLastHistoryDataByUserId($a_usr_id)
        {
                global $ilDB;
                        
                $ilDB->setLimit(1, 0);
                $res = $ilDB->queryF('
                        SELECT login, history_date FROM loginname_history
                        WHERE usr_id = %s ORDER BY history_date DESC',
                        array('integer'), array($a_usr_id));
                $row = $ilDB->fetchAssoc($res);
                if(!is_array($row) || !count($row)) throw new ilUserException('');
                
                return array(
                        $row['login'], $row['history_date']
                );
        }
        
        function updateLogin($a_login)
        {
                global $ilDB, $ilSetting;

                if(func_num_args() != 1)
                {
                        return false;
                }

                if(!isset($a_login))
                {
                        return false;
                }

                // Update not necessary
                if(0 == strcmp($a_login, self::_lookupLogin($this->getId())))
                {
                        return false;
                }               
                
                try
                {
                        $last_history_entry = ilObjUser::_getLastHistoryDataByUserId($this->getId());           
                }
                catch(ilUserException $e) { $last_history_entry = null; }                               
        
                // throw exception if the desired loginame is already in history and it is not allowed to reuse it
                if((int)$ilSetting->get('allow_change_loginname') &&
                   (int)$ilSetting->get('reuse_of_loginnames') == 0 &&
                   self::_doesLoginnameExistInHistory($a_login))
                {
                        throw new ilUserException($this->lng->txt('loginname_already_exists'));
                }
                else if((int)$ilSetting->get('allow_change_loginname') &&
                            (int)$ilSetting->get('loginname_change_blocking_time') &&
                                is_array($last_history_entry) && 
                                $last_history_entry[1] + (int)$ilSetting->get('loginname_change_blocking_time') > time())
                {       
                        include_once 'Services/Calendar/classes/class.ilDate.php';
                        throw new ilUserException(
                                sprintf(
                                        $this->lng->txt('changing_loginname_not_possible_info'),
                                        ilDatePresentation::formatDate(
                                                new ilDateTime($last_history_entry[1], IL_CAL_UNIX)),
                                        ilDatePresentation::formatDate(
                                                new ilDateTime(($last_history_entry[1] + (int)$ilSetting->get('loginname_change_blocking_time')), IL_CAL_UNIX))
                                )
                        );
                }
                else                    
                {                       
                        // log old loginname in history
                        if((int)$ilSetting->get('allow_change_loginname') &&
                           (int)$ilSetting->get('create_history_loginname'))
                        {
                                ilObjUser::_writeHistory($this->getId(), self::_lookupLogin($this->getId()));   
                        }

                        //update login
                        $this->login = $a_login;

                        $ilDB->manipulateF('
                                UPDATE usr_data
                                SET login = %s
                                WHERE usr_id = %s',
                                array('text', 'integer'), array($this->getLogin(), $this->getId()));                    
                }
                
                return true;
        }

        function writePref($a_keyword, $a_value)
        {
                self::_writePref($this->id, $a_keyword, $a_value);
                $this->setPref($a_keyword, $a_value);
        }


        function deletePref($a_keyword)
        {
                self::_deletePref($this->getId(), $a_keyword);
        }

        public static function _deletePref($a_user_id, $a_keyword)
        {
                global $ilDB;

                $ilDB->manipulateF(
                        'DELETE FROM usr_pref WHERE usr_id = %s AND keyword = %s',
                        array('integer', 'text'),
                        array($a_user_id, $a_keyword)
                );
        }

        function _deleteAllPref($a_user_id)
        {
                global $ilDB;

                $ilDB->manipulateF("DELETE FROM usr_pref WHERE usr_id = %s",
                        array("integer"), array($a_user_id));
        }

        public static function _writePref($a_usr_id, $a_keyword, $a_value)
        {
                global $ilDB;
                
                self::_deletePref($a_usr_id, $a_keyword);
                if(strlen($a_value))
                {
                        $ilDB->manipulateF(
                                'INSERT INTO usr_pref (usr_id, keyword, value) VALUES (%s, %s, %s)',
                                array('integer', 'text', 'text'),
                                array($a_usr_id, $a_keyword, $a_value)
                        );
                }
        }

        function writePrefs()
        {
                global $ilDB;

                ilObjUser::_deleteAllPref($this->id);
                foreach ($this->prefs as $keyword => $value)
                {
                        self::_writePref($this->id, $keyword, $value);
                }
        }

        public function getTimeZone()
        {
                if($tz = $this->getPref('user_tz'))
                {
                        return $tz;
                }
                else
                {
                        include_once('Services/Calendar/classes/class.ilCalendarSettings.php');
                        $settings = ilCalendarSettings::_getInstance();
                        return $settings->getDefaultTimeZone();
                }
        }

        public function getTimeFormat()
        {
                if($format = $this->getPref('time_format'))
                {
                        return $format;
                }
                else
                {
                        include_once('Services/Calendar/classes/class.ilCalendarSettings.php');
                        $settings = ilCalendarSettings::_getInstance();
                        return $settings->getDefaultTimeFormat();
                }
        }

        public function getDateFormat()
        {
                if($format = $this->getPref('date_format'))
                {
                        return $format;
                }
                else
                {
                        include_once('Services/Calendar/classes/class.ilCalendarSettings.php');
                        $settings = ilCalendarSettings::_getInstance();
                        return $settings->getDefaultDateFormat();
                }
        }

        function setPref($a_keyword, $a_value)
        {
                if ($a_keyword != "")
                {
                        $this->prefs[$a_keyword] = $a_value;
                }
        }

        function getPref($a_keyword)
        {
                if (array_key_exists($a_keyword, $this->prefs))
                {
                        return $this->prefs[$a_keyword];
                }
                else
                {
                        return FALSE;
                }
        }

        function _lookupPref($a_usr_id,$a_keyword)
        {
                global $ilDB;

                $query = "SELECT * FROM usr_pref WHERE usr_id = ".$ilDB->quote($a_usr_id, "integer")." ".
                        "AND keyword = ".$ilDB->quote($a_keyword, "text");
                $res = $ilDB->query($query);

                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        return $row->value;
                }
                return false;
        }

        function readPrefs()
        {
                global $ilDB;

                if (is_array($this->prefs))
                {
                        $this->oldPrefs = $this->prefs;
                }

                $this->prefs = ilObjUser::_getPreferences($this->id);
        }

        function delete()
        {
                global $rbacadmin, $ilDB;

                // deassign from ldap groups
                include_once('Services/LDAP/classes/class.ilLDAPRoleGroupMapping.php');
                $mapping = ilLDAPRoleGroupMapping::_getInstance();
                $mapping->deleteUser($this->getId());

                // remove mailbox / update sent mails
                include_once ("Services/Mail/classes/class.ilMailbox.php");
                $mailbox = new ilMailbox($this->getId());
                $mailbox->delete();
                $mailbox->updateMailsOfDeletedUser($this->getLogin());

                // delete feed blocks on personal desktop
                include_once("./Services/Block/classes/class.ilCustomBlock.php");
                $costum_block = new ilCustomBlock();
                $costum_block->setContextObjId($this->getId());
                $costum_block->setContextObjType("user");
                $c_blocks = $costum_block->queryBlocksForContext();
                include_once("./Services/Feeds/classes/class.ilPDExternalFeedBlock.php");
                foreach($c_blocks as $c_block)
                {
                        if ($c_block["type"] == "pdfeed")
                        {
                                $fb = new ilPDExternalFeedBlock($c_block["id"]);
                                $fb->delete();
                        }
                }


                // delete block settings
                include_once("./Services/Block/classes/class.ilBlockSetting.php");
                ilBlockSetting::_deleteSettingsOfUser($this->getId());

                // delete user_account
                $ilDB->manipulateF("DELETE FROM usr_data WHERE usr_id = %s",
                        array("integer"), array($this->getId()));

                // delete user_prefs
                ilObjUser::_deleteAllPref($this->getId());
                
                $this->removeUserPicture(false); // #8597

                // delete user_session
                include_once("./Services/Authentication/classes/class.ilSession.php");
                ilSession::_destroyByUserId($this->getId());

                // remove user from rbac
                $rbacadmin->removeUser($this->getId());

                // remove bookmarks
                // TODO: move this to class.ilBookmarkFolder
                $q = "DELETE FROM bookmark_tree WHERE tree = ".
                        $ilDB->quote($this->getId(), "integer");
                $ilDB->manipulate($q);

                $q = "DELETE FROM bookmark_data WHERE user_id = ".
                        $ilDB->quote($this->getId(), "integer");
                $ilDB->manipulate($q);

                // DELETE FORUM ENTRIES (not complete in the moment)
                include_once './Modules/Forum/classes/class.ilObjForum.php';
                ilObjForum::_deleteUser($this->getId());

                // Delete link check notify entries
                include_once './Services/LinkChecker/classes/class.ilLinkCheckNotify.php';
                ilLinkCheckNotify::_deleteUser($this->getId());

                // Delete crs entries
                include_once './Modules/Course/classes/class.ilObjCourse.php';
                ilObjCourse::_deleteUser($this->getId());

                // Delete user tracking
                include_once './Services/Tracking/classes/class.ilObjUserTracking.php';
                ilObjUserTracking::_deleteUser($this->getId());

                include_once 'Modules/Session/classes/class.ilEventParticipants.php';
                ilEventParticipants::_deleteByUser($this->getId());
                
                // Delete Tracking data SCORM 2004 RTE
                include_once 'Modules/Scorm2004/classes/ilSCORM13Package.php';
                ilSCORM13Package::_removeTrackingDataForUser($this->getId());
                
                // Delete Tracking data SCORM 1.2 RTE
                include_once 'Modules/ScormAicc/classes/class.ilObjSCORMLearningModule.php';
                ilObjSCORMLearningModule::_removeTrackingDataForUser($this->getId());

                // remove all notifications
                include_once "./Services/Notification/classes/class.ilNotification.php";
                ilNotification::removeForUser($this->getId());
                
                // remove portfolios
                include_once "./Services/Portfolio/classes/class.ilObjPortfolio.php";
                ilObjPortfolio::deleteUserPortfolios($this->getId());
                
                // remove workspace
                include_once "./Services/PersonalWorkspace/classes/class.ilWorkspaceTree.php";
                $tree = new ilWorkspaceTree($this->getId());
                $tree->cascadingDelete();
                
                // Delete user defined field entries
                $this->deleteUserDefinedFieldEntries();
                
                // Delete clipboard entries
                $this->clipboardDeleteAll();
                
                // Reset owner
                $this->resetOwner();
                

                // Trigger deleteUser Event
                global $ilAppEventHandler;
                $ilAppEventHandler->raise(
                        'Services/User', 'deleteUser', array('usr_id' => $this->getId())
                );

                // delete object data
                parent::delete();
                return true;
        }

        function setFullname($a_title = "",$a_firstname = "",$a_lastname = "")
        {
                $this->fullname = "";

                if ($a_title)
                {
                        $fullname = $a_title." ";
                }
                elseif ($this->utitle)
                {
                        $this->fullname = $this->utitle." ";
                }

                if ($a_firstname)
                {
                        $fullname .= $a_firstname." ";
                }
                elseif ($this->firstname)
                {
                        $this->fullname .= $this->firstname." ";
                }

                if ($a_lastname)
                {
                        return $fullname.$a_lastname;
                }

                $this->fullname .= $this->lastname;
        }

        function getFullname($a_max_strlen = 0)
        {
                if (!$a_max_strlen)
                {
                        return ilUtil::stripSlashes($this->fullname);
                }

                if (strlen($this->fullname) <= $a_max_strlen)
                {
                        return ilUtil::stripSlashes($this->fullname);
                }

                if ((strlen($this->utitle) + strlen($this->lastname) + 4) <= $a_max_strlen)
                {
                        return ilUtil::stripSlashes($this->utitle." ".substr($this->firstname,0,1).". ".$this->lastname);
                }

                if ((strlen($this->firstname) + strlen($this->lastname) + 1) <= $a_max_strlen)
                {
                        return ilUtil::stripSlashes($this->firstname." ".$this->lastname);
                }

                if ((strlen($this->lastname) + 3) <= $a_max_strlen)
                {
                        return ilUtil::stripSlashes(substr($this->firstname,0,1).". ".$this->lastname);
                }

                return ilUtil::stripSlashes(substr($this->lastname,0,$a_max_strlen));
        }

        public static function _hasAcceptedAgreement($a_username)
        {
                global $ilDB;

                if($a_username == 'root')
                {
                        return true;
                }

                $res = $ilDB->queryF("SELECT usr_id FROM usr_data ".
                        "WHERE login = %s AND NOT agree_date IS NULL",
                        array("text"), array($a_username));
                return $ilDB->fetchAssoc($res) ? true : false;
        }


        function hasAcceptedUserAgreement()
        {
                if ($this->agree_date != null || $this->login == "root")
                {
                        return true;
                }
                return false;
        }

        function setLogin($a_str)
        {
                $this->login = $a_str;
        }

        function getLogin()
        {
                return $this->login;
        }

        function setPasswd($a_str, $a_type = IL_PASSWD_PLAIN)
        {
                $this->passwd = $a_str;
                $this->passwd_type = $a_type;
        }

        function getPasswd()
        {
                return $this->passwd;
        }
        function getPasswdType()
        {
                return $this->passwd_type;
        }

        function setGender($a_str)
        {
                $this->gender = substr($a_str,-1);
        }

        function getGender()
        {
                return $this->gender;
        }

        function setUTitle($a_str)
        {
                $this->utitle = $a_str;
        }

        function getUTitle()
        {
                return $this->utitle;
        }

        function setFirstname($a_str)
        {
                $this->firstname = $a_str;
        }

        function getFirstname()
        {
                return $this->firstname;
        }

        function setLastname($a_str)
        {
                $this->lastname = $a_str;
        }

        function getLastname()
        {
                return $this->lastname;
        }

        function setInstitution($a_str)
        {
                $this->institution = $a_str;
        }

        function getInstitution()
        {
                return $this->institution;
        }

        function setDepartment($a_str)
        {
                $this->department = $a_str;
        }

        function getDepartment()
        {
                return $this->department;
        }

        function setStreet($a_str)
        {
                $this->street = $a_str;
        }

        function getStreet()
        {
                return $this->street;
        }

        function setCity($a_str)
        {
                $this->city = $a_str;
        }

        function getCity()
        {
                return $this->city;
        }

        function setZipcode($a_str)
        {
                $this->zipcode = $a_str;
        }

        function getZipcode()
        {
                return $this->zipcode;
        }

        function setCountry($a_str)
        {
                $this->country = $a_str;
        }

        function getCountry()
        {
                return $this->country;
        }

        function setSelectedCountry($a_val)
        {
                $this->sel_country = $a_val;
        }

        function getSelectedCountry()
        {
                return $this->sel_country;
        }

        function setPhoneOffice($a_str)
        {
                $this->phone_office = $a_str;
        }

        function getPhoneOffice()
        {
                return $this->phone_office;
        }

        function setPhoneHome($a_str)
        {
                $this->phone_home = $a_str;
        }

        function getPhoneHome()
        {
                return $this->phone_home;
        }

        function setPhoneMobile($a_str)
        {
                $this->phone_mobile = $a_str;
        }

        function getPhoneMobile()
        {
                return $this->phone_mobile;
        }

        function setFax($a_str)
        {
                $this->fax = $a_str;
        }

        function getFax()
        {
                return $this->fax;
        }

        function setClientIP($a_str)
        {
                $this->client_ip = $a_str;
        }

        function getClientIP()
        {
                return $this->client_ip;
        }

        function setMatriculation($a_str)
        {
                $this->matriculation = $a_str;
        }

        function getMatriculation()
        {
                return $this->matriculation;
        }

        public static function lookupMatriculation($a_usr_id)
        {
                global $ilDB;
                
                $query = "SELECT matriculation FROM usr_data ".
                        "WHERE usr_id = ".$ilDB->quote($a_usr_id);
                $res = $ilDB->query($query);
                $row = $res->fetchRow(DB_FETCHMODE_OBJECT);
                return $row->matriculation ? $row->matriculation : '';
        }

        function setEmail($a_str)
        {
                $this->email = $a_str;
        }

        function getEmail()
        {
                return $this->email;
        }

        function setHobby($a_str)
        {
                $this->hobby = $a_str;
        }

        function getHobby()
        {
                return $this->hobby;
        }

        function setLanguage($a_str)
        {
                $this->setPref("language",$a_str);
                unset($_SESSION['lang']);
        }

        function getLanguage()
        {
                 return $this->prefs["language"];
        }

        function setDiskQuota($a_disk_quota)
        {
                $this->setPref("disk_quota",$a_disk_quota);
        }

        function getDiskQuota()
        {
                 return $this->prefs["disk_quota"] ? $this->prefs["disk_quota"] : 0;
        }

        public function setLastPasswordChangeTS($a_last_password_change_ts)
        {
                $this->last_password_change_ts = $a_last_password_change_ts;
        }

        public function getLastPasswordChangeTS()
        {
                return $this->last_password_change_ts;
        }


        public static function _lookupLanguage($a_usr_id)
        {
                global $ilDB;

                $q = "SELECT value FROM usr_pref WHERE usr_id= ".
                        $ilDB->quote($a_usr_id, "integer")." AND keyword = ".
                        $ilDB->quote('language', "text");
                $r = $ilDB->query($q);

                while($row = $ilDB->fetchAssoc($r))
                {
                        return $row['value'];
                }
                return 'en';
        }


        function _checkPassword($a_usr_id, $a_pw)
        {
                global $ilDB;

                $pw = ilObjUser::_lookup($a_usr_id, "passwd");
                if ($pw == md5($a_pw))
                {
                        return true;
                }
                return false;
        }

        function _writeExternalAccount($a_usr_id, $a_ext_id)
        {
                global $ilDB;

                $ilDB->manipulateF("UPDATE usr_data ".
                        " SET ext_account = %s WHERE usr_id = %s",
                        array("text", "integer"),
                        array($a_ext_id, $a_usr_id));
        }

        function _writeAuthMode($a_usr_id, $a_auth_mode)
        {
                global $ilDB;

                $ilDB->manipulateF("UPDATE usr_data ".
                        " SET auth_mode = %s WHERE usr_id = %s",
                        array("text", "integer"),
                        array($a_auth_mode, $a_usr_id));
        }

        function getCurrentLanguage()
        {
                return $_SESSION['lang'];
        }

        function setLastLogin($a_str)
        {
                $this->last_login = $a_str;
        }

        function getLastLogin()
        {
                 return $this->last_login;
        }

        function setLastUpdate($a_str)
        {
                $this->last_update = $a_str;
        }
        function getLastUpdate()
        {
                return $this->last_update;
        }

    function setComment($a_str)
    {
        $this->referral_comment = $a_str;
    }

    function getComment()
    {
        return $this->referral_comment;
    }

    function setApproveDate($a_str)
    {
        $this->approve_date = $a_str;
    }

    function getApproveDate()
    {
        return $this->approve_date;
    }

        // BEGIN DiskQuota: show when user accepted user agreement
    function getAgreeDate()
    {
        return $this->agree_date;
    }
    function setAgreeDate($a_str)
    {
        $this->agree_date = $a_str;
    }
        // END DiskQuota: show when user accepted user agreement

    function setActive($a_active, $a_owner = 0)
    {
                $this->setOwner($a_owner);

                if ($a_active)
        {
            $this->active = 1;
            $this->setApproveDate(date('Y-m-d H:i:s'));
            $this->setOwner($a_owner);
        }
        else
        {
            $this->active = 0;
            $this->setApproveDate(null);
        }
    }

    function getActive()
    {
        return $this->active;
    }

        public function _lookupActive($a_usr_id)
        {
                global $ilDB;

                $query = 'SELECT usr_id FROM usr_data '.
                        'WHERE active = '.$ilDB->quote(1,'integer').' '.
                        'AND usr_id = '.$ilDB->quote($a_usr_id,'integer');
                $res = $ilDB->query($query);
                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        return true;
                }
                return false;
        }

    function syncActive()
    {
        global $ilAuth;

        $storedActive   = 0;
        if ($this->getStoredActive($this->id))
        {
            $storedActive   = 1;
        }

        $currentActive  = 0;
        if ($this->active)
        {
            $currentActive  = 1;
        }

        if ((!empty($storedActive) && empty($currentActive)) ||
                (empty($storedActive) && !empty($currentActive)))
        {
            $this->setActive($currentActive, $this->getUserIdByLogin(ilObjUser::getLoginFromAuth()));
        }
    }

    function getStoredActive($a_id)
    {
                $active = ilObjUser::_lookup($a_id, "active");
        return $active ? true : false;
    }

        function setSkin($a_str)
        {
                // TODO: exception handling (dir exists)
                $this->skin = $a_str;
        }

    function setTimeLimitOwner($a_owner)
    {
        $this->time_limit_owner = $a_owner;
    }
    function getTimeLimitOwner()
    {
        return $this->time_limit_owner ? $this->time_limit_owner : 7;
    }
    function setTimeLimitFrom($a_from)
    {
        $this->time_limit_from = $a_from;
    }
    function getTimeLimitFrom()
    {
        return $this->time_limit_from ? $this->time_limit_from : time();
    }
    function setTimeLimitUntil($a_until)
    {
        $this->time_limit_until = $a_until;
    }
    function getTimeLimitUntil()
    {
        return $this->time_limit_until ? $this->time_limit_until : time();
    }
    function setTimeLimitUnlimited($a_unlimited)
    {
        $this->time_limit_unlimited = $a_unlimited;
    }
    function getTimeLimitUnlimited()
    {
        return $this->time_limit_unlimited;
    }
        function setTimeLimitMessage($a_time_limit_message)
        {
                return $this->time_limit_message = $a_time_limit_message;
        }
        function getTimeLimitMessage()
        {
                return $this->time_limit_message;
        }

        public function setLoginAttempts($a_login_attempts)
        {
                $this->login_attempts = $a_login_attempts;
        }

        public function getLoginAttempts()
        {
                return $this->login_attempts;
        }


        function checkTimeLimit()
        {
                if($this->getTimeLimitUnlimited())
                {
                        return true;
                }
                if($this->getTimeLimitFrom() < time() and $this->getTimeLimitUntil() > time())
                {
                        return true;
                }
                return false;
        }
    function setProfileIncomplete($a_prof_inc)
    {
        $this->profile_incomplete = (boolean) $a_prof_inc;
    }
    function getProfileIncomplete()
    {
                if($this->id == ANONYMOUS_USER_ID)
                {
                        return false;
                }
        return $this->profile_incomplete;
    }

    public function isPasswordChangeDemanded()
    {
                //error_reporting(E_ALL);
                if( $this->id == ANONYMOUS_USER_ID || $this->id == SYSTEM_USER_ID )
                        return false;

        require_once('./Services/PrivacySecurity/classes/class.ilSecuritySettings.php');
        $security = ilSecuritySettings::_getInstance();
        
                if( !ilAuthUtils::_needsExternalAccountByAuthMode( $this->getAuthMode(true) )
                        && $security->isPasswordChangeOnFirstLoginEnabled()
                        && $this->getLastPasswordChangeTS() == 0
                        && $this->is_self_registered == false
                ){
                        return true;
                }
                else return false;
    }

    public function isPasswordExpired()
    {
                //error_reporting(E_ALL);
                if($this->id == ANONYMOUS_USER_ID) return false;

        require_once('./Services/PrivacySecurity/classes/class.ilSecuritySettings.php');
        $security = ilSecuritySettings::_getInstance();
        if( $security->getAccountSecurityMode() == ilSecuritySettings::ACCOUNT_SECURITY_MODE_CUSTOMIZED &&
                $this->getLastPasswordChangeTS() > 0 )
        {
                $max_pass_age = $security->getPasswordMaxAge();
                if( $max_pass_age > 0 )
                {
                        $max_pass_age_ts = ( $max_pass_age * 86400 );
                                $pass_change_ts = $this->getLastPasswordChangeTS();
                                $current_ts = time();

                                if( ($current_ts - $pass_change_ts) > $max_pass_age_ts )
                                        return true;
                }
        }
        return false;
    }

    public function getPasswordAge()
    {
        $current_ts = time();
        $pass_change_ts = $this->getLastPasswordChangeTS();
        $password_age = (int) ( ($current_ts - $pass_change_ts) / 86400 );
        return $password_age;
    }

    public function setLastPasswordChangeToNow()
    {
                global $ilDB;
                
        $this->setLastPasswordChangeTS( time() );

        $query = "UPDATE usr_data SET last_password_change = %s " .
                        "WHERE usr_id = %s";
        $affected = $ilDB->manipulateF($query,
                        array('integer','integer'),
                        array($this->getLastPasswordChangeTS(),$this->id));
        if($affected) return true;
        else return false;
    }

    public function resetLastPasswordChange()
    {
                global $ilDB;
                
                $query = "UPDATE usr_data SET last_password_change = 0 " .
                                "WHERE usr_id = %s";
                $affected = $ilDB->manipulateF( $query, array('integer'),
                array($this->getId()) );
        if($affected) return true;
        else return false;
    }

        function setLatitude($a_latitude)
        {
                $this->latitude = $a_latitude;
        }

        function getLatitude()
        {
                return $this->latitude;
        }

        function setLongitude($a_longitude)
        {
                $this->longitude = $a_longitude;
        }

        function getLongitude()
        {
                return $this->longitude;
        }

        function setLocationZoom($a_locationzoom)
        {
                $this->loc_zoom = $a_locationzoom;
        }

        function getLocationZoom()
        {
                return $this->loc_zoom;
        }

        function &getAppliedUsers()
        {
                $this->applied_users = array();
                $this->__readAppliedUsers($this->getId());

                return $this->applied_users ? $this->applied_users : array();
        }

        function isChild($a_usr_id)
        {
                if($a_usr_id == $this->getId())
                {
                        return true;
                }

                $this->applied_users = array();
                $this->__readAppliedUsers($this->getId());

                return in_array($a_usr_id,$this->applied_users);
        }

        function __readAppliedUsers($a_parent_id)
        {
                global $ilDB;

                $res = $ilDB->queryF("SELECT usr_id FROM usr_data ".
                        "WHERE time_limit_owner = %s",
                        array("integer"),
                        array($a_parent_id));
                while ($row = $ilDB->fetchObject($res))
                {
                        $this->applied_users[] = $row->usr_id;

                        // recursion
                        $this->__readAppliedUsers($row->usr_id);
                }
                return true;
        }
        
        static function hasActiveSession($a_user_id)
        {
                global $ilDB;
        
                $set = $ilDB->queryf('
                        SELECT COUNT(*) session_count
                        FROM usr_session WHERE user_id = %s AND expires > %s',
                        array('integer', 'integer'),
                        array($a_user_id, time()));     
                $row = $ilDB->fetchAssoc($set);
                return (bool)$row['session_count'];             
        }

        /*
     * check user id with login name
     * @access  public
     */
        function checkUserId()
        {
                global $ilAuth, $ilSetting;

                $login = ilObjUser::getLoginFromAuth();
                $id = ilObjUser::_lookupId($login);
                if ($id > 0)
                {
                        return $id;
                }
                return false;
        }

        private static function getLoginFromAuth() {
                global $ilAuth;
                
                // BEGIN WebDAV: Strip Microsoft Domain Names from logins
                require_once ('Services/WebDAV/classes/class.ilDAVActivationChecker.php');
                if (ilDAVActivationChecker::_isActive())
                {
                        require_once ('Services/WebDAV/classes/class.ilDAVServer.php');
                        require_once ('Services/Database/classes/class.ilAuthContainerMDB2.php');
                        $login = ilAuthContainerMDB2::toUsernameWithoutDomain($ilAuth->getUsername());
                }
                else
                {
                        $login =$ilAuth->getUsername();
                }
                
                return $login;
        }

    /*
     * check to see if current user has been made active
     * @access  public
     * @return  true if active, otherwise false
     */
    function isCurrentUserActive()
    {
                global $ilDB,$ilAuth;

                $login = ilObjUser::getLoginFromAuth();
                $set = $ilDB->queryF("SELECT active FROM usr_data WHERE login= %s",
                        array("text"),
                        array($login));
        //query has got a result
                if ($rec = $ilDB->fetchAssoc($set))
                {
                        if ($rec["active"])
                        {
                                return true;
                        }
                }
                
                return false;
    }

    /*
         * STATIC METHOD
         * get the user_id of a login name
         * @param       string login name
         * @return  integer id of user
         * @static
         * @access      public
         */
        function getUserIdByLogin($a_login)
        {
                return (int) ilObjUser::_lookupId($a_login);
        }

        function _getUserIdsByEmail($a_email)
        {
                global $ilias, $ilDB;

                $res = $ilDB->queryF("SELECT login FROM usr_data ".
                        "WHERE email = %s and active = 1",
                        array("text"),
                        array($a_email));
                $ids = array ();
        while($row = $ilDB->fetchObject($res))
        {
            $ids[] = $row->login;
        }

                return $ids;
        }



        function getUserIdByEmail($a_email)
        {
                global $ilDB;

                $res = $ilDB->queryF("SELECT usr_id FROM usr_data ".
                        "WHERE email = %s", array("text"), array($a_email));

                $row = $ilDB->fetchObject($res);
                return $row->usr_id ? $row->usr_id : 0;
        }

    /*
     * STATIC METHOD
     * get the login name of a user_id
     * @param   integer id of user
     * @return  string login name; false if not found
     * @static
     * @access  public
     */
    function getLoginByUserId($a_userid)
    {
        $login = ilObjUser::_lookupLogin($a_userid);
        return $login ? $login : false;
    }

        static function searchUsers($a_search_str, $active = 1, $a_return_ids_only = false, $filter_settings = FALSE)
        {
                global $ilias, $ilDB, $ilLog;

                
                $query = "SELECT usr_data.usr_id, usr_data.login, usr_data.firstname, usr_data.lastname, usr_data.email, usr_data.active FROM usr_data ";
                
                $without_anonymous_users = true;

                // determine join filter
                $join_filter = " WHERE ";
                if ($filter_settings !== FALSE && strlen($filter_settings))
                {
                        switch ($filter_settings)
                        {
                                case 3:
                                        // show only users without courses
                                        $join_filter = " LEFT JOIN obj_members ON usr_data.usr_id = obj_members.usr_id WHERE obj_members.usr_id IS NULL AND ";
                                        break;
                                case 5:
                                        // show only users with a certain course membership
                                        $ref_id = $_SESSION["user_filter_data"];
                                        if ($ref_id)
                                        {
                                                $join_filter = " LEFT JOIN obj_members ON usr_data.usr_id = obj_members.usr_id WHERE obj_members.obj_id = ".
                                                        "(SELECT obj_id FROM object_reference WHERE ref_id = ".$ilDB->quote($ref_id, "integer").") AND ";
                                        }
                                        break;
                                case 6:
                                        global $rbacreview;
                                        $ref_id = $_SESSION["user_filter_data"];
                                        if ($ref_id)
                                        {
                                                $rolf = $rbacreview->getRoleFolderOfObject($ref_id);
                                                $local_roles = $rbacreview->getRolesOfRoleFolder($rolf["ref_id"],false);
                                                if (is_array($local_roles) && count($local_roles))
                                                {
                                                        $join_filter = " LEFT JOIN rbac_ua ON usr_data.usr_id = rbac_ua.usr_id WHERE ".
                                                                $ilDB->in("rbac_ua.rol_id", $local_roles, false, $local_roles)." AND ";
                                                }
                                        }
                                        break;
                                case 7:
                                        global $rbacreview;
                                        $rol_id = $_SESSION["user_filter_data"];
                                        if ($rol_id)
                                        {
                                                $join_filter = " LEFT JOIN rbac_ua ON usr_data.usr_id = rbac_ua.usr_id WHERE rbac_ua.rol_id = ".
                                                        $ilDB->quote($rol_id, "integer")." AND ";
                                                $without_anonymous_users = false;
                                        }
                                        break;
                        }
                }
                // This is a temporary hack to search users by their role
                // See Mantis #338. This is a hack due to Mantis #337.
                if (strtolower(substr($a_search_str, 0, 5)) == "role:")
                {
                        $query = "SELECT DISTINCT usr_data.usr_id,usr_data.login,usr_data.firstname,usr_data.lastname,usr_data.email ".
                                "FROM object_data,rbac_ua,usr_data ".
                                "WHERE ".$ilDB->like("object_data.title", "text", "%".substr($a_search_str,5)."%").
                                " AND object_data.type = 'role' ".
                                "AND rbac_ua.rol_id = object_data.obj_id ".
                                "AND usr_data.usr_id = rbac_ua.usr_id ".
                                "AND rbac_ua.usr_id != ".$ilDB->quote(ANONYMOUS_USER_ID, "integer");
                }
                else
                {
                        $query.= $join_filter.
                                "(".$ilDB->like("usr_data.login", "text", "%".$a_search_str."%")." ".
                                "OR ".$ilDB->like("usr_data.firstname", "text", "%".$a_search_str."%")." ".
                                "OR ".$ilDB->like("usr_data.lastname", "text", "%".$a_search_str."%")." ".
                                "OR ".$ilDB->like("usr_data.email", "text", "%".$a_search_str."%").") ";

                        if ($filter_settings !== FALSE && strlen($filter_settings))
                        {
                                switch ($filter_settings)
                                {
                                        case 0:
                                                $query.= " AND usr_data.active = ".$ilDB->quote(0, "integer")." ";
                                                break;
                                        case 1:
                                                $query.= " AND usr_data.active = ".$ilDB->quote(1, "integer")." ";
                                                break;
                                        case 2:
                                                $query.= " AND usr_data.time_limit_unlimited = ".$ilDB->quote(0, "integer")." ";
                                                break;
                                        case 4:
                                                $date = strftime("%Y-%m-%d %H:%I:%S", mktime(0, 0, 0, $_SESSION["user_filter_data"]["m"], $_SESSION["user_filter_data"]["d"], $_SESSION["user_filter_data"]["y"]));
                                                $query.= " AND last_login < ".$ilDB->quote($date, "timestamp")." ";
                                                break;
                                }
                        }
                                
                        if ($without_anonymous_users)
                        {
                                $query.= "AND usr_data.usr_id != ".$ilDB->quote(ANONYMOUS_USER_ID, "integer");
                        }

                        if (is_numeric($active) && $active > -1 && $filter_settings === FALSE)
                        {
                                $query.= " AND active = ".$ilDB->quote($active, "integer")." ";
                        }

                }
                $ilLog->write($query);
                $res = $ilDB->query($query);
                while ($row = $ilDB->fetchObject($res))
                {
                        $users[] = array(
                                "usr_id"    => $row->usr_id,
                                "login"     => $row->login,
                                "firstname" => $row->firstname,
                                "lastname"  => $row->lastname,
                                "email"     => $row->email,
                                "active"    => $row->active);
                        $ids[] = $row->usr_id;
                }
                if ($a_return_ids_only)
                        return $ids ? $ids : array();
                else
                        return $users ? $users : array();
        }

        function _getAllUserLogins(&$ilias)
        {
                global $ilDB;
                
                $res = $ilDB->query("SELECT login FROM usr_data");
                while($row = $ilDB->fetchObject($res))
                {
                        $logins[] = $row->login;
                }
                return $logins ? $logins : array();
        }

        public static function _readUsersProfileData($a_user_ids)
        {
                global $ilDB;
                $res = $ilDB->query("SELECT * FROM usr_data WHERE ".
                        $ilDB->in("usr_id", $a_user_ids, false, "integer"));
                while ($row = $ilDB->fetchAssoc($res))
                {
                        $user_data["$row[usr_id]"] = $row;
                }
                return $user_data ? $user_data : array();
        }

        function _getAllUserData($a_fields = NULL, $active =-1)
        {
                global $ilDB;

                $result_arr = array();
                $types = array();
                $values = array();

                if ($a_fields !== NULL and is_array($a_fields))
                {
                        if (count($a_fields) == 0)
                        {
                                $select = "*";
                        }
                        else
                        {
                        if (($usr_id_field = array_search("usr_id",$a_fields)) !== false)
                                unset($a_fields[$usr_id_field]);

                                $select = implode(",",$a_fields).",usr_data.usr_id";
                                // online time
                                if(in_array('online_time',$a_fields))
                                {
                                        $select .= ",ut_online.online_time ";
                                }
                        }

                        $q = "SELECT ".$select." FROM usr_data ";

                        // Add online_time if desired
                        // Need left join here to show users that never logged in
                        if(in_array('online_time',$a_fields))
                        {
                                $q .= "LEFT JOIN ut_online ON usr_data.usr_id = ut_online.usr_id ";
                        }

                        switch ($active)
                        {
                                case 0:
                                case 1:
                                        $q .= "WHERE active = ".$ilDB->quote($active, "integer");
                                        break;
                                case 2:
                                        $q .= "WHERE time_limit_unlimited= ".$ilDB->quote(0, "integer");;
                                        break;
                                case 3:
                                        $qtemp = $q . ", rbac_ua, object_data WHERE rbac_ua.rol_id = object_data.obj_id AND ".
                                                $ilDB->like("object_data.title", "text", "%crs%")." AND usr_data.usr_id = rbac_ua.usr_id";
                                        $r = $ilDB->query($qtemp);
                                        $course_users = array();
                                        while ($row = $ilDB->fetchAssoc($r))
                                        {
                                                array_push($course_users, $row["usr_id"]);
                                        }
                                        if (count($course_users))
                                        {
                                                $q .= " WHERE ".$ilDB->in("usr_data.usr_id", $course_users, true, "integer")." ";
                                        }
                                        else
                                        {
                                                return $result_arr;
                                        }
                                        break;
                                case 4:
                                        $date = strftime("%Y-%m-%d %H:%I:%S", mktime(0, 0, 0, $_SESSION["user_filter_data"]["m"], $_SESSION["user_filter_data"]["d"], $_SESSION["user_filter_data"]["y"]));
                                        $q.= " AND last_login < ".$ilDB->quote($date, "timestamp");
                                        break;
                                case 5:
                                        $ref_id = $_SESSION["user_filter_data"];
                                        if ($ref_id)
                                        {
                                                $q .= " LEFT JOIN obj_members ON usr_data.usr_id = obj_members.usr_id ".
                                                        "WHERE obj_members.obj_id = (SELECT obj_id FROM object_reference ".
                                                        "WHERE ref_id = ".$ilDB->quote($ref_id, "integer").") ";
                                        }
                                        break;
                                case 6:
                                        global $rbacreview;
                                        $ref_id = $_SESSION["user_filter_data"];
                                        if ($ref_id)
                                        {
                                                $rolf = $rbacreview->getRoleFolderOfObject($ref_id);
                                                $local_roles = $rbacreview->getRolesOfRoleFolder($rolf["ref_id"],false);
                                                if (is_array($local_roles) && count($local_roles))
                                        {
                                                        $q.= " LEFT JOIN rbac_ua ON usr_data.usr_id = rbac_ua.usr_id WHERE ".
                                                                $ilDB->in("rbac_ua.rol_id", $local_roles, false, "integer")." ";
                                                }
                                        }
                                        break;
                                case 7:
                                        $rol_id = $_SESSION["user_filter_data"];
                                        if ($rol_id)
                                        {
                                                $q .= " LEFT JOIN rbac_ua ON usr_data.usr_id = rbac_ua.usr_id WHERE rbac_ua.rol_id = ".
                                                        $ilDB->quote($rol_id, "integer");
                                        }
                                        break;
                        }
                        $r = $ilDB->query($q);

                        while ($row = $ilDB->fetchAssoc($r))
                        {
                                $result_arr[] = $row;
                        }
                }

                return $result_arr;
        }

        function _getNumberOfUsersForStyle($a_skin, $a_style)
        {
                global $ilDB;

                $q = "SELECT count(*) as cnt FROM usr_pref up1, usr_pref up2 ".
                        " WHERE up1.keyword= ".$ilDB->quote("style", "text").
                        " AND up1.value= ".$ilDB->quote($a_style, "text").
                        " AND up2.keyword= ".$ilDB->quote("skin", "text").
                        " AND up2.value= ".$ilDB->quote($a_skin, "text").
                        " AND up1.usr_id = up2.usr_id ";

                $cnt_set = $ilDB->query($q);

                $cnt_rec = $ilDB->fetchAssoc($cnt_set);

                return $cnt_rec["cnt"];
        }

        function _getAllUserAssignedStyles()
        {
                global $ilDB;

                $q = "SELECT DISTINCT up1.value style, up2.value skin FROM usr_pref up1, usr_pref up2 ".
                        " WHERE up1.keyword = ".$ilDB->quote("style", "text").
                        " AND up2.keyword = ".$ilDB->quote("skin", "text").
                        " AND up1.usr_id = up2.usr_id";
                        
                $sty_set = $ilDB->query($q);

                $styles = array();
                while($sty_rec = $ilDB->fetchAssoc($sty_set))
                {
                        $styles[] = $sty_rec["skin"].":".$sty_rec["style"];
                }

                return $styles;
        }

        function _moveUsersToStyle($a_from_skin, $a_from_style, $a_to_skin, $a_to_style)
        {
                global $ilDB;

                $q = "SELECT up1.usr_id usr_id FROM usr_pref up1, usr_pref up2 ".
                        " WHERE up1.keyword= ".$ilDB->quote("style", "text").
                        " AND up1.value= ".$ilDB->quote($a_from_style, "text").
                        " AND up2.keyword= ".$ilDB->quote("skin", "text").
                        " AND up2.value= ".$ilDB->quote($a_from_skin, "text").
                        " AND up1.usr_id = up2.usr_id ";

                $usr_set = $ilDB->query($q);

                while ($usr_rec = $ilDB->fetchAssoc($usr_set))
                {
                        self::_writePref($usr_rec["usr_id"], "skin", $a_to_skin);
                        self::_writePref($usr_rec["usr_id"], "style", $a_to_style);
                }
        }


        public static function _addDesktopItem($a_usr_id, $a_item_id, $a_type, $a_par = "")
        {
                global $ilDB;

                $item_set = $ilDB->queryF("SELECT * FROM desktop_item WHERE ".
                        "item_id = %s AND type = %s AND user_id = %s",
                        array("integer", "text", "integer"),
                        array($a_item_id, $a_type, $a_usr_id));

                // only insert if item is not already on desktop
                if (!$ilDB->fetchAssoc($item_set))
                {
                        $ilDB->manipulateF("INSERT INTO desktop_item (item_id, type, user_id, parameters) VALUES ".
                                " (%s,%s,%s,%s)", array("integer", "text", "integer", "text"),
                                array($a_item_id,$a_type,$a_usr_id,$a_par));
                }
                
                include_once './Services/Calendar/classes/class.ilCalendarCategories.php';
                ilCalendarCategories::deletePDItemsCache($a_usr_id);
        }

        function addDesktopItem($a_item_id, $a_type, $a_par = "")
        {
                ilObjUser::_addDesktopItem($this->getId(), $a_item_id, $a_type, $a_par);
        }

        function setDesktopItemParameters($a_item_id, $a_type, $a_par)
        {
                global $ilDB;

                $ilDB->manipulateF("UPDATE desktop_item SET parameters = %s ".
                        " WHERE item_id = %s AND type = %s AND user_id = %s",
                        array("text", "integer", "text", "integer"),
                        array($a_par, $a_item_id, $a_type, $this->getId()));
        }


        public static function _dropDesktopItem($a_usr_id, $a_item_id, $a_type)
        {
                global $ilDB;

                $ilDB->manipulateF("DELETE FROM desktop_item WHERE ".
                        " item_id = %s AND type = %s  AND user_id = %s",
                        array("integer", "text", "integer"),
                        array($a_item_id, $a_type, $a_usr_id));

                include_once './Services/Calendar/classes/class.ilCalendarCategories.php';
                ilCalendarCategories::deletePDItemsCache($a_usr_id);
        }

        function dropDesktopItem($a_item_id, $a_type)
        {
                ilObjUser::_dropDesktopItem($this->getId(), $a_item_id, $a_type);
        }

        static function _removeItemFromDesktops($a_id)
        {
                global $ilDB;
                
                $r = $ilDB->queryF("SELECT user_id FROM desktop_item WHERE item_id = %s",
                        array("integer"), array($a_id));

                $users = array();

                while ($row = $ilDB->fetchObject($r))
                {
                        $users[] = $row->user_id;
                } // while

                if (count($users) > 0)
                {
                        $ilDB->manipulateF("DELETE FROM desktop_item WHERE item_id = %s",
                                array("integer"), array($a_id));
                }

                return $users;
        }

        public static function _isDesktopItem($a_usr_id, $a_item_id, $a_type)
        {
                global $ilDB;

                if (self::$is_desktop_item_loaded[$a_usr_id.":".$a_item_id])
                {
                        return self::$is_desktop_item_cache[$a_usr_id.":".$a_item_id.":".$a_type];
                }
                $item_set = $ilDB->queryF("SELECT item_id FROM desktop_item WHERE ".
                        "item_id = %s AND type = %s AND user_id = %s",
                        array("integer", "text", "integer"),
                        array($a_item_id, $a_type, $a_usr_id));

                if ($ilDB->fetchAssoc($item_set))
                {
                        return true;
                }
                else
                {
                        return false;
                }
        }

        static function preloadIsDesktopItem($a_usr_id, $a_item_ids)
        {
                global $ilDB;

                if (!is_array($a_item_ids))
                {
                        return;
                }

                $item_ids = array();
                foreach ($a_item_ids as $id)
                {
                        if (!self::$is_desktop_item_loaded[$a_usr_id.":".$id])
                        {
                                $item_ids[] = $id;
                        }
                        self::$is_desktop_item_loaded[$a_usr_id.":".$id] = true;
                }

                if (count($item_ids) > 0)
                {
                        $item_set = $ilDB->query("SELECT item_id, type FROM desktop_item WHERE ".
                                $ilDB->in("item_id", $item_ids, false, "integer").
                                " AND user_id = ".$ilDB->quote($a_usr_id, "integer"));
                        while ($r = $ilDB->fetchAssoc($item_set))
                        {
                                self::$is_desktop_item_cache[$a_usr_id.":".$r["item_id"].":".$r["type"]]
                                        = true;
                        }
                }
        }

        function isDesktopItem($a_item_id, $a_type)
        {
                return ilObjUser::_isDesktopItem($this->getId(), $a_item_id, $a_type);
        }

        function getDesktopItems($a_types = "")
        {
                return $this->_lookupDesktopItems($this->getId(), $a_types);
        }

        static function _lookupDesktopItems($user_id, $a_types = "")
        {
                global $ilUser, $rbacsystem, $tree, $ilDB;

                if ($a_types == "")
                {
                        $item_set = $ilDB->queryF("SELECT obj.obj_id, obj.description, oref.ref_id, obj.title, obj.type ".
                                " FROM desktop_item it, object_reference oref ".
                                        ", object_data obj".
                                " WHERE ".
                                "it.item_id = oref.ref_id AND ".
                                "oref.obj_id = obj.obj_id AND ".
                                "it.user_id = %s", array("integer"), array($user_id));
                        $items = array();
                        while ($item_rec = $ilDB->fetchAssoc($item_set))
                        {
                                if ($tree->isInTree($item_rec["ref_id"])
                                        && $item_rec["type"] != "rolf"
                                        && $item_rec["type"] != "itgr") // due to bug 11508
                                {
                                        $parent_ref = $tree->getParentId($item_rec["ref_id"]);
                                        $par_left = $tree->getLeftValue($parent_ref);
                                        $par_left = sprintf("%010d", $par_left);


                                        $title = ilObject::_lookupTitle($item_rec["obj_id"]);
                                        $desc = ilObject::_lookupDescription($item_rec["obj_id"]);
                                        $items[$par_left.$title.$item_rec["ref_id"]] =
                                                array("ref_id" => $item_rec["ref_id"],
                                                        "obj_id" => $item_rec["obj_id"],
                                                        "type" => $item_rec["type"],
                                                        "title" => $title,
                                                        "description" => $desc,
                                                        "parent_ref" => $parent_ref);
                                }
                        }
                        ksort($items);
                }
                else
                {
                        // due to bug 11508
                        if (!is_array($a_types))
                        {
                                $a_types = array($a_types);
                        }
                        $items = array();
                        $foundsurveys = array();
                        foreach($a_types as $a_type)
                        {
                                if ($a_type == "itgr")
                                {
                                        continue;
                                }
                                $item_set = $ilDB->queryF("SELECT obj.obj_id, obj.description, oref.ref_id, obj.title FROM desktop_item it, object_reference oref ".
                                        ", object_data obj WHERE ".
                                        "it.item_id = oref.ref_id AND ".
                                        "oref.obj_id = obj.obj_id AND ".
                                        "it.type = %s AND ".
                                        "it.user_id = %s ".
                                        "ORDER BY title",
                                        array("text", "integer"),
                                        array($a_type, $user_id));
                                
                                while ($item_rec = $ilDB->fetchAssoc($item_set))
                                {
                                        $title = ilObject::_lookupTitle($item_rec["obj_id"]);
                                        $desc = ilObject::_lookupDescription($item_rec["obj_id"]);
                                        $items[$title.$a_type.$item_rec["ref_id"]] =
                                                array("ref_id" => $item_rec["ref_id"],
                                                "obj_id" => $item_rec["obj_id"], "type" => $a_type,
                                                "title" => $title, "description" => $desc);
                                }

                        }
                        ksort($items);
                }

                return $items;
        }

        
        function addObjectToClipboard($a_item_id, $a_type, $a_title,
                $a_parent = 0, $a_time = 0, $a_order_nr = 0)
        {
                global $ilDB;

                if ($a_time == 0)
                {
                        $a_time = date("Y-m-d H:i:s", time());
                }

                $item_set = $ilDB->queryF("SELECT * FROM personal_clipboard WHERE ".
                        "parent = %s AND item_id = %s AND type = %s AND user_id = %s",
                        array("integer", "integer", "text", "integer"),
                        array(0, $a_item_id, $a_type, $this->getId()));

                // only insert if item is not already in clipboard
                if (!$d = $item_set->fetchRow())
                {
                        $ilDB->manipulateF("INSERT INTO personal_clipboard ".
                                "(item_id, type, user_id, title, parent, insert_time, order_nr) VALUES ".
                                " (%s,%s,%s,%s,%s,%s,%s)",
                                array("integer", "text", "integer", "text", "integer", "timestamp", "integer"),
                                array($a_item_id, $a_type, $this->getId(), $a_title, (int) $a_parent, $a_time, (int) $a_order_nr));
                }
                else
                {
                        $ilDB->manipulateF("UPDATE personal_clipboard SET insert_time = %s ".
                                "WHERE user_id = %s AND item_id = %s AND type = %s AND parent = 0",
                                array("timestamp", "integer", "integer", "text"),
                                array($a_time, $this->getId(), $a_item_id, $a_type));
                }
        }

        function addToPCClipboard($a_content, $a_time, $a_nr)
        {
                global $ilDB;
                if ($a_time == 0)
                {
                        $a_time = date("Y-m-d H:i:s", time());
                }
                $ilDB->insert("personal_pc_clipboard", array(
                        "user_id" => array("integer", $this->getId()),
                        "content" => array("clob", $a_content),
                        "insert_time" => array("timestamp", $a_time),
                        "order_nr" => array("integer", $a_nr)
                        ));
        }

        function getPCClipboardContent()
        {
                global $ilDB;

                $set = $ilDB->queryF("SELECT MAX(insert_time) mtime FROM personal_pc_clipboard ".
                        " WHERE user_id = %s", array("integer"), array($this->getId()));
                $row = $ilDB->fetchAssoc($set);
                
                $set = $ilDB->queryF("SELECT * FROM personal_pc_clipboard ".
                        " WHERE user_id = %s AND insert_time = %s ORDER BY order_nr ASC",
                        array("integer", "timestamp"),
                        array($this->getId(), $row["mtime"]));
                $content = array();
                while ($row = $ilDB->fetchAssoc($set))
                {
                        $content[] = $row["content"];
                }

                return $content;
        }

        function clipboardHasObjectsOfType($a_type)
        {
                global $ilDB;

                $set = $ilDB->queryF("SELECT * FROM personal_clipboard WHERE ".
                        "parent = %s AND type = %s AND user_id = %s",
                        array("integer", "text", "integer"),
                        array(0, $a_type, $this->getId()));
                if ($rec = $ilDB->fetchAssoc($set))
                {
                        return true;
                }

                return false;
        }

        function clipboardDeleteObjectsOfType($a_type)
        {
                global $ilDB;

                $ilDB->manipulateF("DELETE FROM personal_clipboard WHERE ".
                        "type = %s AND user_id = %s",
                        array("text", "integer"),
                        array($a_type, $this->getId()));
        }

        function clipboardDeleteAll()
        {
                global $ilDB;

                $ilDB->manipulateF("DELETE FROM personal_clipboard WHERE ".
                        "user_id = %s", array("integer"), array($this->getId()));
        }

        function getClipboardObjects($a_type = "", $a_top_nodes_only = false)
        {
                global $ilDB;

                $par = "";
                if ($a_top_nodes_only)
                {
                        $par = " AND parent = ".$ilDB->quote(0, "integer")." ";
                }
                
                $type_str = ($a_type != "")
                        ? " AND type = ".$ilDB->quote($a_type, "text")." "
                        : "";
                $q = "SELECT * FROM personal_clipboard WHERE ".
                        "user_id = ".$ilDB->quote($this->getId(), "integer")." ".
                        $type_str.$par.
                        " ORDER BY order_nr";
                $objs = $ilDB->query($q);
                $objects = array();
                while ($obj = $ilDB->fetchAssoc($objs))
                {
                        if ($obj["type"] == "mob")
                        {
                                $obj["title"] = ilObject::_lookupTitle($obj["item_id"]);
                        }
                        if ($obj["type"] == "incl")
                        {
                                include_once("./Modules/MediaPool/classes/class.ilMediaPoolPage.php");
                                $obj["title"] = ilMediaPoolPage::lookupTitle($obj["item_id"]);
                        }
                        $objects[] = array ("id" => $obj["item_id"],
                                "type" => $obj["type"], "title" => $obj["title"],
                                "insert_time" => $obj["insert_time"]);
                }
                return $objects;
        }

        function getClipboardChilds($a_parent, $a_insert_time)
        {
                global $ilDB, $ilUser;

                $objs = $ilDB->queryF("SELECT * FROM personal_clipboard WHERE ".
                        "user_id = %s AND parent = %s AND insert_time = %s ".
                        " ORDER BY order_nr",
                        array("integer", "integer", "timestamp"),
                        array($ilUser->getId(), (int) $a_parent, $a_insert_time));
                $objects = array();
                while ($obj = $ilDB->fetchAssoc($objs))
                {
                        if ($obj["type"] == "mob")
                        {
                                $obj["title"] = ilObject::_lookupTitle($obj["item_id"]);
                        }
                        $objects[] = array ("id" => $obj["item_id"],
                                "type" => $obj["type"], "title" => $obj["title"]);
                }
                return $objects;
        }

        function _getUsersForClipboadObject($a_type, $a_id)
        {
                global $ilDB;

                $q = "SELECT DISTINCT user_id FROM personal_clipboard WHERE ".
                        "item_id = ".$ilDB->quote($a_id, "integer")." AND ".
                        "type = ".$ilDB->quote($a_type, "text");
                $user_set = $ilDB->query($q);
                $users = array();
                while ($user_rec = $ilDB->fetchAssoc($user_set))
                {
                        $users[] = $user_rec["user_id"];
                }

                return $users;
        }

        function removeObjectFromClipboard($a_item_id, $a_type)
        {
                global $ilDB;

                $q = "DELETE FROM personal_clipboard WHERE ".
                        "item_id = ".$ilDB->quote($a_item_id, "integer").
                        " AND type = ".$ilDB->quote($a_type, "text")." ".
                        " AND user_id = ".$ilDB->quote($this->getId(), "integer");
                $ilDB->manipulate($q);
        }

        function _getImportedUserId($i2_id)
        {
                global $ilDB;

                $query = "SELECT obj_id FROM object_data WHERE import_id = ".
                        $ilDB->quote($i2_id, "text");

                $res = $ilDB->query($query);
                while($row = $ilDB->fetchObject($res))
                {
                        $id = $row->obj_id;
                }
                return $id ? $id : 0;
        }

/*

        function setiLincData($a_id,$a_login,$a_passwd)
        {
                $this->ilinc_id = $a_id;
                $this->ilinc_login = $a_login;
                $this->ilinc_passwd = $a_passwd;
        }

*/

/*

        function getiLincData()
        {
                return array ("id" => $this->ilinc_id, "login" => $this->ilinc_login, "passwd" => $this->ilinc_passwd);
        }
*/
        function setAuthMode($a_str)
        {
                $this->auth_mode = $a_str;
        }

        function getAuthMode($a_auth_key = false)
        {
                if (!$a_auth_key)
                {
                        return $this->auth_mode;
                }

                include_once('./Services/Authentication/classes/class.ilAuthUtils.php');
                return ilAuthUtils::_getAuthMode($this->auth_mode);
        }

        function setExternalAccount($a_str)
        {
                $this->ext_account = $a_str;
        }

        function getExternalAccount()
        {
                return $this->ext_account;
        }

        public static function _getExternalAccountsByAuthMode($a_auth_mode,$a_read_auth_default = false)
        {
                global $ilDB,$ilSetting;

                include_once('./Services/Authentication/classes/class.ilAuthUtils.php');
                $q = "SELECT login,usr_id,ext_account,auth_mode FROM usr_data ".
                        "WHERE auth_mode = %s";
                $types[] = "text";
                $values[] = $a_auth_mode;
                if($a_read_auth_default and ilAuthUtils::_getAuthModeName($ilSetting->get('auth_mode',AUTH_LOCAL)) == $a_auth_mode)
                {
                        $q.= " OR auth_mode = %s ";
                        $types[] = "text";
                        $values[] = 'default';
                }

                $res = $ilDB->queryF($q, $types, $values);
                while ($row = $ilDB->fetchObject($res))
                {
                        if($row->auth_mode == 'default')
                        {
                                $accounts[$row->usr_id] = $row->login;
                        }
                        else
                        {
                                $accounts[$row->usr_id] = $row->ext_account;
                        }
                }
                return $accounts ? $accounts : array();
        }

        public static function _toggleActiveStatusOfUsers($a_usr_ids,$a_status)
        {
                global $ilDB;

                if(!is_array($a_usr_ids))
                {
                        return false;
                }
                
                
                if( $a_status )
                {
                        $q = "UPDATE usr_data SET active = 1, inactivation_date = NULL WHERE ".
                                $ilDB->in("usr_id", $a_usr_ids, false, "integer");
                        $ilDB->manipulate($q);
                }
                else
                {
                        $usrId_IN_usrIds = $ilDB->in("usr_id", $a_usr_ids, false, "integer");

                        $q = "UPDATE usr_data SET active = 0 WHERE $usrId_IN_usrIds";
                        $ilDB->manipulate($q);
                        
                        $queryString = "
                                UPDATE usr_data
                                SET inactivation_date = %s
                                WHERE inactivation_date IS NULL
                                AND $usrId_IN_usrIds
                        ";
                        $ilDB->manipulateF($queryString, array('timestamp'), array(ilUtil::now()));                     
                }
                
                return true;
        }


        public static function _lookupAuthMode($a_usr_id)
        {
                return (string) ilObjUser::_lookup($a_usr_id, "auth_mode");
        }

        public static function _checkExternalAuthAccount($a_auth, $a_account)
        {
                global $ilDB,$ilSetting;

                // Check directly with auth_mode
                $r = $ilDB->queryF("SELECT * FROM usr_data WHERE ".
                        " ext_account = %s AND auth_mode = %s",
                        array("text", "text"),
                        array($a_account, $a_auth));
                if ($usr = $ilDB->fetchAssoc($r))
                {
                        return $usr["login"];
                }

                // For compatibility, check for login (no ext_account entry given)
                $res = $ilDB->queryF("SELECT login FROM usr_data ".
                        "WHERE login = %s AND auth_mode = %s",
                        array("text", "text"),
                        array($a_account, $a_auth));
                if($usr = $ilDB->fetchAssoc($res))
                {
                        return $usr['login'];
                }

                // If auth_default == $a_auth => check for login
                if(ilAuthUtils::_getAuthModeName($ilSetting->get('auth_mode')) == $a_auth)
                {
                        $res = $ilDB->queryF("SELECT login FROM usr_data WHERE ".
                                " ext_account = %s AND auth_mode = %s",
                                array("text", "text"),
                                array($a_account, "default"));
                        if ($usr = $ilDB->fetchAssoc($res))
                        {
                                return $usr["login"];
                        }
                        // Search for login (no ext_account given)
                        $res = $ilDB->queryF("SELECT login FROM usr_data ".
                                "WHERE login = %s AND (ext_account IS NULL OR ext_account = '') AND auth_mode = %s",
                                array("text", "text"),
                                array($a_account, "default"));
                        if($usr = $ilDB->fetchAssoc($res))
                        {
                                return $usr["login"];
                        }
                }
                return false;
        }

        function _getNumberOfUsersPerAuthMode()
        {
                global $ilDB;

                $r = $ilDB->query("SELECT count(*) AS cnt, auth_mode FROM usr_data ".
                        "GROUP BY auth_mode");
                $cnt_arr = array();
                while($cnt = $ilDB->fetchAssoc($r))
                {
                        $cnt_arr[$cnt["auth_mode"]] = $cnt["cnt"];
                }

                return $cnt_arr;
        }

        function _getLocalAccountsForEmail($a_email)
        {
                global $ilDB, $ilSetting;

                // default set to local (1)?

                $q = "SELECT * FROM usr_data WHERE ".
                        " email = %s AND (auth_mode = %s ";
                $types = array("text", "text");
                $values = array($a_email, "local");

                if ($ilSetting->get("auth_mode") == 1)
                {
                        $q.=" OR auth_mode = %s";
                        $types[] = "text";
                        $values[] = "default";
                }
                
                $q.= ")";

                $users = array();
                $usr_set = $ilDB->queryF($q, $types, $values);
                while ($usr_rec = $ilDB->fetchAssoc($usr_set))
                {
                        $users[$usr_rec["usr_id"]] = $usr_rec["login"];
                }

                return $users;
        }


        function _uploadPersonalPicture($tmp_file, $obj_id)
        {
                $webspace_dir = ilUtil::getWebspaceDir();
                $image_dir = $webspace_dir."/usr_images";
                $store_file = "usr_".$obj_id."."."jpg";
                $target_file = $image_dir."/$store_file";

                chmod($tmp_file, 0770);

                // take quality 100 to avoid jpeg artefacts when uploading jpeg files
                // taking only frame [0] to avoid problems with animated gifs
                $show_file  = "$image_dir/usr_".$obj_id.".jpg";
                $thumb_file = "$image_dir/usr_".$obj_id."_small.jpg";
                $xthumb_file = "$image_dir/usr_".$obj_id."_xsmall.jpg";
                $xxthumb_file = "$image_dir/usr_".$obj_id."_xxsmall.jpg";

                ilUtil::execConvert($tmp_file . "[0] -geometry 200x200 -quality 100 JPEG:".$show_file);
                ilUtil::execConvert($tmp_file . "[0] -geometry 100x100 -quality 100 JPEG:".$thumb_file);
                ilUtil::execConvert($tmp_file . "[0] -geometry 75x75 -quality 100 JPEG:".$xthumb_file);
                ilUtil::execConvert($tmp_file . "[0] -geometry 30x30 -quality 100 JPEG:".$xxthumb_file);

                // store filename
                self::_writePref($obj_id, "profile_image", $store_file);

                return TRUE;
        }


        public function getPersonalPicturePath($a_size = "small", $a_force_pic = false)
        {
                if(isset(self::$personal_image_cache[$this->getId()][$a_size][(int)$a_force_pic]))
                {
                        return self::$personal_image_cache[$this->getId()][$a_size][(int)$a_force_pic];
                }

                self::$personal_image_cache[$this->getId()][$a_size][(int)$a_force_pic] = ilObjUser::_getPersonalPicturePath($this->getId(), $a_size, $a_force_pic);

                return self::$personal_image_cache[$this->getId()][$a_size][(int)$a_force_pic];
        }

        public static function _getPersonalPicturePath($a_usr_id,$a_size = "small", $a_force_pic = false,
                $a_prevent_no_photo_image = false)
        {
                global $ilDB;

                // BEGIN DiskQuota: Fetch all user preferences in a single query
                $res = $ilDB->queryF("SELECT * FROM usr_pref WHERE ".
                        "keyword IN (%s,%s) ".
                        "AND usr_id = %s",
                        array("text", "text", "integer"),
                        array('public_upload', 'public_profile', $a_usr_id));
                while ($row = $ilDB->fetchAssoc($res))
                {
                        switch ($row['keyword'])
                        {
                                case 'public_upload' :
                                        $upload = $row['value'] == 'y';
                                        break;
                                case 'public_profile' :
                                        $profile = ($row['value'] == 'y' ||
                                                $row['value'] == 'g');
                                        break;
                        }
                }

                // END DiskQuota: Fetch all user preferences in a single query
                $webspace_dir = "";
                if(defined('ILIAS_MODULE'))
                {
                        $webspace_dir = ('.'.$webspace_dir);
                }
                $webspace_dir .= ('./'.ilUtil::getWebspaceDir());

                $image_dir = $webspace_dir."/usr_images";
                // BEGIN DiskQuota: Support 'big' user images
                if ($a_size == 'big')
                {
                                $thumb_file = $image_dir."/usr_".$a_usr_id.".jpg";
                }
                else
                {
                                $thumb_file = $image_dir."/usr_".$a_usr_id."_".$a_size.".jpg";
                }
                // END DiskQuota: Support 'big' user images
                
                if((($upload && $profile) || $a_force_pic)
                        && @is_file($thumb_file))
                {
                        $file = $thumb_file."?t=".rand(1, 99999);
                }
                else
                {
                        if (!$a_prevent_no_photo_image)
                        {
                                // we only have xsmall and xxsmall for this
                                if($a_size == "small" || $a_size == "big")
                                {
                                        $a_size = "xsmall";
                                }                               
                                $file = ilUtil::getImagePath("no_photo_".$a_size.".jpg");
                        }
                }

                return $file;
        }

        static function copyProfilePicturesToDirectory($a_user_id, $a_dir)
        {
                $a_dir = trim(str_replace("..", "", $a_dir));
                if ($a_dir == "" || !is_dir($a_dir))
                {
                        return;
                }
                
                $webspace_dir = ilUtil::getWebspaceDir();
                $image_dir = $webspace_dir."/usr_images";
                $images = array(
                        "upload_".$a_user_id."pic",
                        "usr_".$a_user_id."."."jpg",
                        "usr_".$a_user_id."_small.jpg",
                        "usr_".$a_user_id."_xsmall.jpg",
                        "usr_".$a_user_id."_xxsmall.jpg",
                        "upload_".$a_user_id);
                foreach ($images as $image)
                {
                        if (is_file($image_dir."/".$image))
                        {
                                copy($image_dir."/".$image, $a_dir."/".$image);
                        }
                }
        }
        
        
        function removeUserPicture($a_do_update = true)
        {
                $webspace_dir = ilUtil::getWebspaceDir();
                $image_dir = $webspace_dir."/usr_images";
                $file = $image_dir."/usr_".$this->getID()."."."jpg";
                $thumb_file = $image_dir."/usr_".$this->getID()."_small.jpg";
                $xthumb_file = $image_dir."/usr_".$this->getID()."_xsmall.jpg";
                $xxthumb_file = $image_dir."/usr_".$this->getID()."_xxsmall.jpg";
                $upload_file = $image_dir."/upload_".$this->getID();

                if($a_do_update)
                {
                        // remove user pref file name
                        $this->setPref("profile_image", "");
                        $this->update();
                }

                if (@is_file($file))
                {
                        unlink($file);
                }
                if (@is_file($thumb_file))
                {
                        unlink($thumb_file);
                }
                if (@is_file($xthumb_file))
                {
                        unlink($xthumb_file);
                }
                if (@is_file($xxthumb_file))
                {
                        unlink($xxthumb_file);
                }
                if (@is_file($upload_file))
                {
                        unlink($upload_file);
                }
        }
        
        
        function setUserDefinedData($a_data)
        {
                if(!is_array($a_data))
                {
                        return false;
                }
                foreach($a_data as $field => $data)
                {
                        #$new_data[$field] = ilUtil::stripSlashes($data);
                        // Assign it directly to avoid update problems of unchangable fields
                        $this->user_defined_data['f_'.$field] = $data;
                }
                #$this->user_defined_data = $new_data;

                return true;
        }

        function getUserDefinedData()
        {
                return $this->user_defined_data ? $this->user_defined_data : array();
        }

        function updateUserDefinedFields()
        {
                global $ilDB;

                $fields = '';

                $field_def = array();
                
                include_once("./Services/User/classes/class.ilUserDefinedData.php");
                $udata = new ilUserDefinedData($this->getId());

                foreach($this->user_defined_data as $field => $value)
                {
                        if($field != 'usr_id')
                        {
//                              $field_def[$field] = array('text',$value);
                                $udata->set($field, $value);
                        }
                }
                $udata->update();

/*              if(!$field_def)
                {
                        return true;
                }
                
                $query = "SELECT usr_id FROM udf_data WHERE usr_id = ".$ilDB->quote($this->getId(),'integer');
                $res = $ilDB->query($query);
                
                
                if($res->numRows())
                {
                        // Update
                        $ilDB->update('udf_data',$field_def,array('usr_id' => array('integer',$this->getId())));
                }
                else
                {
                        $field_def['usr_id'] = array('integer',$this->getId());
                        $ilDB->insert('udf_data',$field_def);
                }
*/
                return true;
        }

        function readUserDefinedFields()
        {
                global $ilDB;

                include_once("./Services/User/classes/class.ilUserDefinedData.php");
                $udata = new ilUserDefinedData($this->getId());

/*              $query = "SELECT * FROM udf_data ".
                        "WHERE usr_id = ".$ilDB->quote($this->getId(),'integer');

                $res = $this->db->query($query);
                while($row = $res->fetchRow(DB_FETCHMODE_ASSOC))
                {
                        $this->user_defined_data = $row;
                }*/
                
                $this->user_defined_data = $udata->getAll();
                
                return true;
        }

        function addUserDefinedFieldEntry()
        {
                global $ilDB;

// not needed. no entry in udf_text/udf_clob means no value

/*              $query = "INSERT INTO udf_data (usr_id ) ".
                        "VALUES( ".
                        $ilDB->quote($this->getId(),'integer').
                        ")";
                $res = $ilDB->manipulate($query);
*/
                return true;
        }

        function deleteUserDefinedFieldEntries()
        {
                global $ilDB;

                include_once("./Services/User/classes/class.ilUserDefinedData.php");
                ilUserDefinedData::deleteEntriesOfUser($this->getId());
                
                // wrong place...
/*              $query = "DELETE FROM udf_data  ".
                        "WHERE usr_id = ".$ilDB->quote($this->getId(),'integer');
                $res = $ilDB->manipulate($query);*/

                return true;
        }

        function getProfileAsString(&$a_language)
        {
                include_once './Services/AccessControl/classes/class.ilObjRole.php';
                include_once './Services/Utilities/classes/class.ilFormat.php';

                global $lng,$rbacreview;

                $language =& $a_language;
                $language->loadLanguageModule('registration');
                $language->loadLanguageModule('crs');

                $body = '';
        $body .= ($language->txt("login").": ".$this->getLogin()."\n");

                if(strlen($this->getUTitle()))
                {
                        $body .= ($language->txt("title").": ".$this->getUTitle()."\n");
                }
                if(strlen($this->getGender()))
                {
                        $gender = ($this->getGender() == 'm') ?
                                $language->txt('gender_m') :
                                $language->txt('gender_f');
                        $body .= ($language->txt("gender").": ".$gender."\n");
                }
                if(strlen($this->getFirstname()))
                {
                        $body .= ($language->txt("firstname").": ".$this->getFirstname()."\n");
                }
                if(strlen($this->getLastname()))
                {
                        $body .= ($language->txt("lastname").": ".$this->getLastname()."\n");
                }
                if(strlen($this->getInstitution()))
                {
                        $body .= ($language->txt("institution").": ".$this->getInstitution()."\n");
                }
                if(strlen($this->getDepartment()))
                {
                        $body .= ($language->txt("department").": ".$this->getDepartment()."\n");
                }
                if(strlen($this->getStreet()))
                {
                        $body .= ($language->txt("street").": ".$this->getStreet()."\n");
                }
                if(strlen($this->getCity()))
                {
                        $body .= ($language->txt("city").": ".$this->getCity()."\n");
                }
                if(strlen($this->getZipcode()))
                {
                        $body .= ($language->txt("zipcode").": ".$this->getZipcode()."\n");
                }
                if(strlen($this->getCountry()))
                {
                        $body .= ($language->txt("country").": ".$this->getCountry()."\n");
                }
                if(strlen($this->getSelectedCountry()))
                {
                        $body .= ($language->txt("sel_country").": ".$this->getSelectedCountry()."\n");
                }
                if(strlen($this->getPhoneOffice()))
                {
                        $body .= ($language->txt("phone_office").": ".$this->getPhoneOffice()."\n");
                }
                if(strlen($this->getPhoneHome()))
                {
                        $body .= ($language->txt("phone_home").": ".$this->getPhoneHome()."\n");
                }
                if(strlen($this->getPhoneMobile()))
                {
                        $body .= ($language->txt("phone_mobile").": ".$this->getPhoneMobile()."\n");
                }
                if(strlen($this->getFax()))
                {
                        $body .= ($language->txt("fax").": ".$this->getFax()."\n");
                }
                if(strlen($this->getEmail()))
                {
                        $body .= ($language->txt("email").": ".$this->getEmail()."\n");
                }
                if(strlen($this->getHobby()))
                {
                        $body .= ($language->txt("hobby").": ".$this->getHobby()."\n");
                }
                if(strlen($this->getComment()))
                {
                        $body .= ($language->txt("referral_comment").": ".$this->getComment()."\n");
                }
                if(strlen($this->getMatriculation()))
                {
                        $body .= ($language->txt("matriculation").": ".$this->getMatriculation()."\n");
                }
                if(strlen($this->getCreateDate()))
                {
                        ilDatePresentation::setUseRelativeDates(false);
                        ilDatePresentation::setLanguage($language);
                        $date = ilDatePresentation::formatDate(new ilDateTime($this->getCreateDate(),IL_CAL_DATETIME));
                        ilDatePresentation::resetToDefaults();
                        
                        $body .= ($language->txt("create_date").": ".$date."\n");
                }

                foreach($rbacreview->getGlobalRoles() as $role)
                {
                        if($rbacreview->isAssigned($this->getId(),$role))
                        {
                                $gr[] = ilObjRole::_lookupTitle($role);
                        }
                }
                if(count($gr))
                {
                        $body .= ($language->txt('reg_role_info').': '.implode(',',$gr)."\n");
                }

                // Time limit
                if($this->getTimeLimitUnlimited())
                {
                        $body .= ($language->txt('time_limit').": ".$language->txt('crs_unlimited')."\n");
                }
                else
                {
                        ilDatePresentation::setUseRelativeDates(false);
                        ilDatePresentation::setLanguage($language);
                        $period = ilDatePresentation::formatPeriod(new ilDateTime($this->getTimeLimitFrom(),IL_CAL_UNIX),
                                new ilDateTime($this->getTimeLimitUntil(),IL_CAL_UNIX));
                        ilDatePresentation::resetToDefaults();
                        
                        $start = new ilDateTime($this->getTimeLimitFrom(),IL_CAL_UNIX);
                        $end = new ilDateTime($this->getTimeLimitUntil(),IL_CAL_UNIX);
                        
                        $body .= $language->txt('time_limit').': '.$start->get(IL_CAL_DATETIME);
                        $body .= $language->txt('time_limit').': '.$end->get(IL_CAL_DATETIME);
                        
                        
                        #$body .= $language->txt('time_limit').': '.$period;
                        /*
                        $body .= ($language->txt('time_limit').": ".$language->txt('crs_from')." ".
                                          ilFormat::formatUnixTime($this->getTimeLimitFrom(), true)." ".
                                          $language->txt('crs_to')." ".
                                          ilFormat::formatUnixTime($this->getTimeLimitUntil(), true)."\n");
                        */
                }
                return $body;
        }

        function setInstantMessengerId($a_im_type, $a_im_id)
        {
                $var = "im_".$a_im_type;
                $this->$var = $a_im_id;
        }

        function getInstantMessengerId($a_im_type)
        {
                $var = "im_".$a_im_type;
                return $this->$var;
        }

        function setDelicious($a_delicious)
        {
                $this->delicious = $a_delicious;
        }

        function getDelicious()
        {
                return $this->delicious;
        }

        function _lookupFeedHash($a_user_id, $a_create = false)
        {
                global $ilDB;

                if ($a_user_id > 0)
                {
                        $set = $ilDB->queryF("SELECT feed_hash from usr_data WHERE usr_id = %s",
                                array("integer"), array($a_user_id));
                        if ($rec = $ilDB->fetchAssoc($set))
                        {
                                if (strlen($rec["feed_hash"]) == 32)
                                {
                                        return $rec["feed_hash"];
                                }
                                else if($a_create)
                                {
                                        $hash = md5(rand(1,9999999) + str_replace(" ", "", (string) microtime()));
                                        $ilDB->manipulateF("UPDATE usr_data SET feed_hash = %s".
                                                " WHERE usr_id = %s",
                                                array("text", "integer"),
                                                array($hash, $a_user_id));
                                        return $hash;
                                }
                        }
                }

                return false;
        }

        function _getFeedPass($a_user_id)
        {
                global $ilDB;

                if ($a_user_id > 0)
                {
                        return ilObjUser::_lookupPref($a_user_id, "priv_feed_pass");
                }
                return false;
        }

        function _setFeedPass($a_user_id, $a_password)
        {
                global $ilDB;
                
                self::_writePref($a_user_id, "priv_feed_pass",
                        ($a_password=="") ? "" : md5($a_password));
        }

        public static function _loginExists($a_login,$a_user_id = 0)
        {
                global $ilDB;

                $q = "SELECT DISTINCT login, usr_id FROM usr_data ".
                         "WHERE login = %s";
                $types[] = "text";
                $values[] = $a_login;
                         
                if ($a_user_id != 0)
                {
                        $q.= " AND usr_id != %s ";
                        $types[] = "integer";
                        $values[] = $a_user_id;
                }
                         
                $r = $ilDB->queryF($q, $types, $values);

                if ($row = $ilDB->fetchAssoc($r))
                {
                        return $row['usr_id'];
                }
                return false;
        }

        public static function _externalAccountExists($a_external_account,$a_auth_mode)
        {
                global $ilDB;

                $res = $ilDB->queryF("SELECT * FROM usr_data ".
                        "WHERE ext_account = %s AND auth_mode = %s",
                        array("text", "text"),
                        array($a_external_account, $a_auth_mode));
                return $ilDB->fetchAssoc($res) ? true :false;
        }

        public static function _getUsersForRole($role_id, $active = -1) {
                global $ilDB, $rbacreview;
                $data = array();

                $ids = $rbacreview->assignedUsers($role_id);

                if (count ($ids) == 0)
                {
                        $ids = array (-1);
                }

                $query = "SELECT usr_data.*, usr_pref.value AS language
                                                        FROM usr_data
                                                        LEFT JOIN usr_pref ON usr_pref.usr_id = usr_data.usr_id AND usr_pref.keyword = %s
                                                        WHERE ".$ilDB->in("usr_data.usr_id", $ids, false, "integer");
                $values[] = "language";
                $types[] = "text";


                if (is_numeric($active) && $active > -1)
                {
                        $query .= " AND usr_data.active = %s";
                        $values[] = $active;
                        $types[] = "integer";
                }
                
                $query .= " ORDER BY usr_data.lastname, usr_data.firstname ";
                
                $r = $ilDB->queryF($query, $types, $values);
                $data = array();
                while ($row = $ilDB->fetchAssoc($r))
                {
                        $data[] = $row;
                }
                return $data;
        }


        public static function _getUsersForFolder ($ref_id, $active) {
                global $ilDB;
                $data = array();
                $query = "SELECT usr_data.*, usr_pref.value AS language FROM usr_data LEFT JOIN usr_pref ON usr_pref.usr_id = usr_data.usr_id and usr_pref.keyword = %s WHERE 1 = 1 ";
                $types[] = "text";
                $values[] = "language";

                if (is_numeric($active) && $active > -1)
                {
                        $query .= " AND usr_data.active = %s";
                        $values[] = $active;
                        $types[] = "integer";
                }

                if ($ref_id != USER_FOLDER_ID)
                {
                    $query.= " AND usr_data.time_limit_owner = %s";
                        $values[] = $ref_id;
                        $types[] = "integer";
                }

                $query .=       " AND usr_data.usr_id != %s ";
                $values[] = ANONYMOUS_USER_ID;
                $types[] = "integer";

                $query .= " ORDER BY usr_data.lastname, usr_data.firstname ";

                $result = $ilDB->queryF($query, $types, $values);
                $data = array();
                while ($row = $ilDB->fetchAssoc($result))
                {
                        array_push($data, $row);
                }

                return $data;
        }


        public static function _getUsersForGroup ($a_mem_ids, $active = -1)
        {
                return ilObjUser::_getUsersForIds($a_mem_ids, $active);
        }


        public static function _getUsersForIds ($a_mem_ids, $active = -1, $timelimitowner = -1)
        {
                global $rbacadmin, $rbacreview, $ilDB;

                // quote all ids
                $ids = array();
                foreach ($a_mem_ids as $mem_id) {
                        $ids [] = $ilDB->quote($mem_id);
                }

                $query = "SELECT usr_data.*, usr_pref.value AS language
                          FROM usr_data
                          LEFT JOIN usr_pref ON usr_pref.usr_id = usr_data.usr_id AND usr_pref.keyword = %s
                          WHERE ".$ilDB->in("usr_data.usr_id", $ids, false, "integer")."
                                        AND usr_data.usr_id != %s";
                $values[] = "language";
                $types[] = "text";
                $values[] = ANONYMOUS_USER_ID;
                $types[] = "integer";

            if (is_numeric($active) && $active > -1)
                {
                        $query .= " AND active = %s";
                        $values[] = $active;
                        $types[] = "integer";
                }

                if ($timelimitowner != USER_FOLDER_ID && $timelimitowner != -1)
                {
                    $query.= " AND usr_data.time_limit_owner = %s";
                        $values[] = $timelimitowner;
                        $types[] = "integer";

                }

                $query .= " ORDER BY usr_data.lastname, usr_data.firstname ";

                $result = $ilDB->queryF($query, $types, $values);
                while ($row = $ilDB->fetchAssoc($result))
                {
                        $mem_arr[] = $row;
                }

                return $mem_arr ? $mem_arr : array();
        }



        public static function _getUserData ($a_internalids) {
                global $ilDB;

                $ids = array();
                if (is_array($a_internalids)) {
                        foreach ($a_internalids as $internalid) {
                                if (is_numeric ($internalid))
                                {
                                        $ids[] = $internalid;
                                }
                                else
                                {
                                        $parsedid = ilUtil::__extractId($internalid, IL_INST_ID);
                                        if (is_numeric($parsedid) && $parsedid > 0)
                                        {
                                                $ids[] = $parsedid;
                                        }
                                }
                        }
                }
                if (count($ids) == 0)
                        $ids [] = -1;

                $query = "SELECT usr_data.*, usr_pref.value AS language
                          FROM usr_data
                          LEFT JOIN usr_pref
                          ON usr_pref.usr_id = usr_data.usr_id AND usr_pref.keyword = %s
                          WHERE ".$ilDB->in("usr_data.usr_id", $ids, false, "integer");
                $values[] = "language";
                $types[] = "text";

                $query .= " ORDER BY usr_data.lastname, usr_data.firstname ";

                $data = array();
                $result = $ilDB->queryF($query, $types, $values);
                while ($row = $ilDB->fetchAssoc($result))
                {
                        $data[] = $row;
                }
                return $data;
        }

        public static function _getPreferences ($user_id)
        {
                global $ilDB;

                $prefs = array();

                $r = $ilDB->queryF("SELECT * FROM usr_pref WHERE usr_id = %s",
                        array("integer"), array($user_id));

                while($row = $ilDB->fetchAssoc($r))
                {
                        $prefs[$row["keyword"]] = $row["value"];
                }

                return $prefs;
        }


        public static function _resetLoginAttempts($a_usr_id)
        {
                global $ilDB;

                $query = "UPDATE usr_data SET login_attempts = 0 WHERE usr_id = %s";
                $affected = $ilDB->manipulateF( $query, array('integer'), array($a_usr_id) );

                if($affected) return true;
                else return false;
        }

        public static function _getLoginAttempts($a_usr_id)
        {
                global $ilDB;

                $query = "SELECT login_attempts FROM usr_data WHERE usr_id = %s";
                $result = $ilDB->queryF( $query, array('integer'), array($a_usr_id) );
                $record = $ilDB->fetchAssoc( $result );
                $login_attempts = $record['login_attempts'];

                return $login_attempts;
        }

        public static function _incrementLoginAttempts($a_usr_id)
        {
                global $ilDB;

                $query = "UPDATE usr_data SET login_attempts = (login_attempts + 1) WHERE usr_id = %s";
                $affected = $ilDB->manipulateF( $query, array('integer'), array($a_usr_id) );

                if($affected) return true;
                else return false;
        }

        public static function _setUserInactive($a_usr_id)
        {
                global $ilDB;

                $query = "UPDATE usr_data SET active = 0, inactivation_date = %s WHERE usr_id = %s";
                $affected = $ilDB->manipulateF( $query, array('timestamp', 'integer'), array(ilUtil::now(), $a_usr_id) );
                
                if($affected) return true;
                else return false;
        }
        
        public function hasPublicProfile() {
                return in_array($this->getPref("public_profile"), array("y", "g"));
        }
        
        public function getPublicName() 
        {
                if ($this->hasPublicProfile())
                        return $this->getFirstname()." ".$this->getLastname()." (".$this->getLogin().")";
                else    
                        return $this->getLogin();
                
        }
        
        public static function _writeHistory($a_usr_id, $a_login)
        {
                global $ilDB;

                $timestamp = time();
                        
                $res = $ilDB->queryF('SELECT * FROM loginname_history WHERE usr_id = %s AND login = %s AND history_date = %s',
                                                array('integer', 'text', 'integer'),
                                                array($a_usr_id, $a_login, $timestamp));
                
                if( $ilDB->numRows($res) == 0 )
                {
                        $ilDB->manipulateF('
                                INSERT INTO loginname_history 
                                                (usr_id, login, history_date)
                                VALUES  (%s, %s, %s)',
                                array('integer', 'text', 'integer'),
                                array($a_usr_id, $a_login, $timestamp));
                }               
                
                return true;
        }
        
        function _getUsersOnline($a_user_id = 0, $a_no_anonymous = false)
        {
                global $ilDB;

                $pd_set = new ilSetting("pd");
                $atime = $pd_set->get("user_activity_time") * 60;
                $ctime = time();

                if ($a_user_id == 0)
                {
                        $where = "WHERE user_id != 0 AND NOT agree_date IS NULL ";
                        $type_array = array("integer");
                        $val_array = array(time());
                }
                else
                {
                        $where = "WHERE user_id = %s ";
                        $type_array = array("integer", "integer");
                        $val_array = array($a_user_id, time());
                }

                $no_anonym = ($a_no_anonymous)
                        ? "AND user_id <> ".$ilDB->quote(ANONYMOUS_USER_ID, "integer")." "
                        : "";
                        
                include_once './Services/User/classes/class.ilUserAccountSettings.php';
                if(ilUserAccountSettings::getInstance()->isUserAccessRestricted())
                {
                        include_once './Services/User/classes/class.ilUserFilter.php';
                        $user_filter = 'AND '.$ilDB->in('time_limit_owner',ilUserFilter::getInstance()->getFolderIds(),false,'integer').' ';
                }
                else
                {
                        $user_filter = ' ';
                }
                $r = $ilDB->queryF($q = "SELECT count(user_id) as num,user_id,firstname,lastname,title,login,last_login,max(ctime) AS ctime ".
                        "FROM usr_session ".
                        "LEFT JOIN usr_data u ON user_id = u.usr_id ".
                        "LEFT JOIN usr_pref p ON (p.usr_id = u.usr_id AND p.keyword = ".
                                $ilDB->quote("hide_own_online_status", "text").") ".$where.
                        "AND expires > %s ".
                        "AND (p.value IS NULL OR NOT p.value = ".$ilDB->quote("y", "text").") ".
                        $no_anonym.
                        $user_filter.
                        "GROUP BY user_id,firstname,lastname,title,login,last_login ".
                        "ORDER BY lastname, firstname", $type_array, $val_array);

                while ($user = $ilDB->fetchAssoc($r))
                {
                        if ($atime <= 0
                                || $user["ctime"] + $atime > $ctime)
                        {
                                $users[$user["user_id"]] = $user;
                        }
                }

                return $users ? $users : array();
        }

        function _getAssociatedUsersOnline($a_user_id, $a_no_anonymous = false)
        {
                global $ilias, $ilDB;

                $pd_set = new ilSetting("pd");
                $atime = $pd_set->get("user_activity_time") * 60;
                $ctime = time();
                $no_anonym = ($a_no_anonymous)
                        ? "AND user_id <> ".$ilDB->quote(ANONYMOUS_USER_ID, "integer")." "
                        : "";

                // Get a list of object id's of all courses and groups for which
                // the current user has local roles.
                // Note: we have to use DISTINCT here, because a user may assume
                // multiple roles in a group or a course.
                $q = "SELECT DISTINCT dat.obj_id as obj_id ".
                        "FROM rbac_ua ua ".
                        "JOIN rbac_fa fa ON fa.rol_id = ua.rol_id ".
                        "JOIN object_reference r1 ON r1.ref_id = fa.parent ".
                        "JOIN tree ON tree.child = r1.ref_id ".
                        "JOIN object_reference r2 ON r2.ref_id = tree.parent ".
                        "JOIN object_data dat ON dat.obj_id = r2.obj_id ".
                        "WHERE ua.usr_id = ".$ilDB->quote($a_user_id, "integer")." ".
                        "AND fa.assign = ".$ilDB->quote("y", "text")." ".
                        "AND dat.type IN (".$ilDB->quote("crs", "text").",".
                        $ilDB->quote("grp", "text").")";
                $r = $ilDB->query($q);

                while ($row = $ilDB->fetchAssoc($r))
                {
                        $groups_and_courses_of_user[] = $row["obj_id"];
                }
                // If the user is not in a course or a group, he has no associated users.
                if (count($groups_and_courses_of_user) == 0)
                {
                        $q = "SELECT count(user_id) as num,ctime,user_id,firstname,lastname,title,login,last_login ".
                                "FROM usr_session ".
                                "JOIN usr_data ON user_id=usr_id ".
                                "WHERE user_id = ".$ilDB->quote($a_user_id, "integer")." ".
                                $no_anonym.
                                " AND NOT agree_date IS NULL ".
                                "AND expires > ".$ilDB->quote(time(), "integer")." ".
                                "GROUP BY user_id,ctime,firstname,lastname,title,login,last_login";
                        $r = $ilDB->query($q);
                }
                else
                {
                        $q = "SELECT count(user_id) as num,s.ctime,s.user_id,ud.firstname,ud.lastname,ud.title,ud.login,ud.last_login ".
                                "FROM usr_session s ".
                                "JOIN usr_data ud ON ud.usr_id = s.user_id ".
                                "JOIN rbac_ua ua ON ua.usr_id = s.user_id ".
                                "JOIN rbac_fa fa ON fa.rol_id = ua.rol_id ".
                                "JOIN tree ON tree.child = fa.parent ".
                                "JOIN object_reference or1 ON or1.ref_id = tree.parent ".
                                "JOIN object_data od ON od.obj_id = or1.obj_id ".
                                "LEFT JOIN usr_pref p ON (p.usr_id = ud.usr_id AND p.keyword = ".
                                        $ilDB->quote("hide_own_online_status", "text").") ".
                                "WHERE s.user_id != 0 ".
                                $no_anonym.
                                "AND (p.value IS NULL OR NOT p.value = ".$ilDB->quote("y", "text").") ".
                                "AND s.expires > ".$ilDB->quote(time(),"integer")." ".
                                "AND fa.assign = ".$ilDB->quote("y", "text")." ".
                                " AND NOT ud.agree_date IS NULL ".
                                "AND ".$ilDB->in("od.obj_id", $groups_and_courses_of_user, false, "integer")." ".
                                "GROUP BY s.user_id,s.ctime,ud.firstname,ud.lastname,ud.title,ud.login,ud.last_login ".
                                "ORDER BY ud.lastname, ud.firstname";
                        $r = $ilDB->query($q);
                }

                while ($user = $ilDB->fetchAssoc($r))
                {
                        if ($atime <= 0
                                || $user["ctime"] + $atime > $ctime)
                        {
                                $users[$user["user_id"]] = $user;
                        }
                }

                return $users ? $users : array();
        }
        
        public static function _generateRegistrationHash($a_usr_id)
        {
                global $ilDB;
                
                do
                {
                        $continue = false;
                        
                        $hashcode = substr(md5(uniqid(rand(), true)), 0, 16);
                        
                        $res = $ilDB->queryf('
                                SELECT COUNT(usr_id) cnt FROM usr_data 
                                WHERE reg_hash = %s',
                        array('text'),
                        array($hashcode));                       
                        while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                        {
                                if($row->cnt > 0) $continue = true;
                                break;
                        }
                        
                        if($continue) continue;
                        
                        $ilDB->manipulateF('
                                UPDATE usr_data 
                                SET reg_hash = %s       
                                WHERE usr_id = %s',
                                array('text', 'integer'),
                                array($hashcode, (int)$a_usr_id)
                        );
                        
                        break;
                        
                } while(true);          
                
                return $hashcode;
        }
        
        public static function _verifyRegistrationHash($a_hash)
        {
                global $ilDB;
                
                $res = $ilDB->queryf('
                        SELECT usr_id, create_date FROM usr_data 
                        WHERE reg_hash = %s',
                array('text'),
                array($a_hash));                         
                while($row = $ilDB->fetchAssoc($res))
                {
                        require_once 'Services/Registration/classes/class.ilRegistrationSettings.php';
                        $oRegSettigs = new ilRegistrationSettings();
                        
                        if((int)$oRegSettigs->getRegistrationHashLifetime() != 0 &&
                           time() - (int)$oRegSettigs->getRegistrationHashLifetime() > strtotime($row['create_date']))
                        {
                                require_once 'Services/Registration/exceptions/class.ilRegConfirmationLinkExpiredException.php';
                                throw new ilRegConfirmationLinkExpiredException('reg_confirmation_hash_life_time_expired', $row['usr_id']);     
                        }               
                        
                        $ilDB->manipulateF('
                                UPDATE usr_data 
                                SET reg_hash = %s
                                WHERE usr_id = %s',
                                array('text', 'integer'),
                                array('', (int)$row['usr_id'])
                        );
                        
                        return (int)$row['usr_id'];
                }               
                
                require_once 'Services/Registration/exceptions/class.ilRegistrationHashNotFoundException.php';
                throw new ilRegistrationHashNotFoundException('reg_confirmation_hash_not_found');
        }

        function setBirthday($a_birthday)
        {
                if (strlen($a_birthday))
                {
                        $date = new ilDate($a_birthday, IL_CAL_DATE);
                        $this->birthday = $date->get(IL_CAL_DATE);
                }
                else
                {
                        $this->birthday = null;
                }
        }
        
        function getBirthday()
        {
                return $this->birthday;
        }

        public static function _getUserIdsByInactivityPeriod($period)
        {
                if( !(int)$period ) throw new ilException('no valid period given');

                global $ilDB;

                $date = date( 'Y-m-d H:i:s', (time() - ((int)$period * 24 * 60 * 60)) );

                $query = "SELECT usr_id FROM usr_data WHERE last_login < %s";

                $res = $ilDB->queryF($query, array('timestamp'), array($date));

                $ids = array();
                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        $ids[] = $row->usr_id;
                }

                return $ids;
        }
        
        public static function _getUserIdsByInactivationPeriod($period)
        {
                $field = 'inactivation_date';
                
                if( !(int)$period ) throw new ilException('no valid period given');

                global $ilDB;

                $date = date( 'Y-m-d H:i:s', (time() - ((int)$period * 24 * 60 * 60)) );

                $query = "SELECT usr_id FROM usr_data WHERE $field < %s AND active = %s";

                $res = $ilDB->queryF($query, array('timestamp', 'integer'), array($date, 0));
                
                $ids = array();
                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        $ids[] = $row->usr_id;
                }

                return $ids;
        }

        public static function _updateLastLogin($a_usr_id, $a_last_login = null)
        {
                if($a_last_login !== null) $last_login = $a_last_login;
                else $last_login = date('Y-m-d H:i:s');

                global $ilDB;

                $query = "UPDATE usr_data SET last_login = %s WHERE usr_id = %s";
                $affected = $ilDB->manipulateF( $query, array('timestamp', 'integer'), array($last_login, $a_usr_id) );

                if($affected) return $last_login;
                else return false;
        }
        
        public function resetOwner()
        {
                global $ilDB;
                
                $query = "UPDATE object_data SET owner = 0 ".
                        "WHERE owner = ".$ilDB->quote($this->getId(),'integer');
                $ilDB->query($query);
                
                return true;
        }


        static function getFirstLettersOfLastnames()
        {
                global $ilDB;

                $q = "SELECT DISTINCT ".$ilDB->upper($ilDB->substr("lastname", 1, 1))." let".
                        " FROM usr_data".
                        " WHERE usr_id <> ".$ilDB->quote(ANONYMOUS_USER_ID, "integer").
                        " ORDER BY let";
                $let_set = $ilDB->query($q);

                $lets = array();
                while ($let_rec = $ilDB->fetchAssoc($let_set))
                {
                        $let[$let_rec["let"]] = $let_rec["let"];
                }
                return $let;
        }
        
        // begin-patch deleteProgress
        public static function userExists($a_usr_ids = array())
        {
                global $ilDB;
                
                $query = 'SELECT count(*) num FROM object_data od '.
                                'JOIN usr_data ud ON obj_id = usr_id '.
                                'WHERE '.$ilDB->in('obj_id',$a_usr_ids,false,'integer').' ';
                $res = $ilDB->query($query);
                $num_rows =$res->fetchRow(DB_FETCHMODE_OBJECT)->num;
                return $num_rows == count((array) $a_usr_ids);
        }
        // end-patch deleteProgress

        function isCaptchaVerified()
        {
                return (boolean) $_SESSION["user_captcha_verified"];
        }
        
        function setCaptchaVerified($a_val)
        {
                $_SESSION["user_captcha_verified"] = $a_val;
        }
        
        function exportPersonalData()
        {
                include_once("./Services/Export/classes/class.ilExport.php");
                $exp = new ilExport();
                $dir = ilExport::_getExportDirectory($this->getId(), "xml", "usr", "personal_data");
                ilUtil::delDir($dir, true);
                $title = $this->getLastname().", ".$this->getLastname()." [".$this->getLogin()."]";
                $exp->exportEntity("personal_data", $this->getId(), "4.3.0",
                        "Services/User", $title, $dir);
        }
        
        function getPersonalDataExportFile()
        {
                include_once("./Services/Export/classes/class.ilExport.php");
                $dir = ilExport::_getExportDirectory($this->getId(), "xml", "usr", "personal_data");
                if (!is_dir($dir))
                {
                        return "";
                }
                foreach(ilUtil::getDir($dir) as $entry)
                {
                        if (is_int(strpos($entry["entry"], ".zip")))
                        {
                                return $entry["entry"];
                        }
                }
                
                return "";
        }
        
        function sendPersonalDataFile()
        {
                include_once("./Services/Export/classes/class.ilExport.php");
                $file = ilExport::_getExportDirectory($this->getId(), "xml", "usr", "personal_data").
                        "/".$this->getPersonalDataExportFile();
                if (is_file($file))
                {
                        ilUtil::deliverFile($file, $this->getPersonalDataExportFile());
                }
        }
        
        function importPersonalData($a_file, $a_profile_data, $a_settings,
                $a_bookmarks, $a_notes, $a_calendar)
        {
                include_once("./Services/Export/classes/class.ilImport.php");
                $imp = new ilImport();
                if (!$a_profile_data)
                {
                        $imp->addSkipEntity("Services/User", "usr_profile");
                }
                if (!$a_settings)
                {
                        $imp->addSkipEntity("Services/User", "usr_setting");
                }
                if (!$a_bookmarks)
                {
                        $imp->addSkipEntity("Services/Bookmarks", "bookmarks");
                }
                if (!$a_notes)
                {
                        $imp->addSkipEntity("Services/Notes", "user_notes");
                }
                if (!$a_calendar)
                {
                        $imp->addSkipEntity("Services/Calendar", "calendar");
                }
                $imp->importEntity($a_file["tmp_name"], $a_file["name"], "personal_data",
                        "Services/User");
        }
        
        private static function initInactivationDate($usrIds)
        {
                global $ilDB;
                
                $NOW = $ilDB->now();
                
                $usrId_IN_usrIds = $ilDB->in('usr_id', $usrIds, false, 'integer');
                
                $queryString = "
                        UPDATE usr_data
                        SET inactivation_date = $NOW
                        WHERE inactivation_date IS NULL
                        AND $usrId_IN_usrIds
                ";
                
                $ilDB->manipulate($queryString);
        }
        
        private static function resetInactivationDate($usrIds)
        {
                global $ilDB;
                
                $usrId_IN_usrIds = $ilDB->in('usr_id', $usrIds, false, 'integer');
                
                $queryString = "
                        UPDATE usr_data
                        SET inactivation_date = NULL
                        WHERE $usrId_IN_usrIds
                ";
                
                $ilDB->manipulate($queryString);
        }
        
        public function setInactivationDate($inactivation_date)
        {
                $this->inactivation_date = $inactivation_date;
        }
        
        public function getInactivationDate()
        {
                return $this->inactivation_date;
        }


        public function isAnonymous()
        {
                return $this->getId() == ANONYMOUS_USER_ID;
        }
        
        public function activateDeletionFlag()
        {               
                $this->writePref("delete_flag", true);
        }
        
        public function removeDeletionFlag()
        {
                $this->writePref("delete_flag", false);
        }
        
        public function hasDeletionFlag()
        {
                return (bool)$this->getPref("delete_flag");
        }

        public function setIsSelfRegistered($status)
        {
                $this->is_self_registered = (bool) $status;
        }
        
        public function isSelfRegistered()
        {
                return (bool) $this->is_self_registered;
        }
        
} // END class ilObjUser
?>