class.ilCronDeleteInactiveUserReminderMail.php

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<?php
/* Copyright (c) 1998-2014 ILIAS open source, Extended GPL, see docs/LICENSE */

include_once 'Services/Mail/classes/class.ilMailNotification.php';

class ilCronDeleteInactiveUserReminderMail
{
        const TABLE_NAME = "usr_cron_mail_reminder";

        private function mailSent($usr_id)
        {
                global $ilDB;
                $ilDB->manipulateF("INSERT INTO " . self::TABLE_NAME . " (usr_id, ts) VALUES (%s, %s)",
                        array(
                                "integer",
                                "integer"
                        ),
                        array(
                                $usr_id,
                                time()
                        )
                );
        }

        private function sendReminder(ilObjUser $user, $reminderTime, $time_frame_for_deletion)
        {
                include_once 'Services/User/classes/class.ilCronDeleteInactiveUserReminderMailNotification.php';
                $mail = new ilCronDeleteInactiveUserReminderMailNotification();
                $mail->setRecipients(array($user));
                $mail->setAdditionalInformation(
                         array(
                                 "www"  => ilUtil::_getHttpPath(),
                                 "days" => $reminderTime,
                                 "date" => $time_frame_for_deletion
                         )
                );
                $mail->send();
                self::mailSent($user->getId());
        }

        public static function removeEntriesFromTableIfLastLoginIsNewer()
        {
                global $ilDB;
                $query = "SELECT usr_id,ts FROM " . self::TABLE_NAME;
                $res   = $ilDB->queryF($query, array(
                        'integer',
                        'integer'
                ), array(
                        'usr_id',
                        'ts'
                ));
                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        $lastLoginUnixtime = strtotime(ilObjUser::_lookupLastLogin($row->usr_id));
                        $lastReminderSent  = (int)$row->ts;
                        if($lastLoginUnixtime >= $lastReminderSent)
                        {
                                self::removeSingleUserFromTable($row->usr_id);
                        }
                }
        }

        public static function checkIfReminderMailShouldBeSend(ilObjUser $user, $reminderTime, $time_frame_for_deletion)
        {
                global $ilDB;
                $query = "SELECT ts FROM " . self::TABLE_NAME . " WHERE usr_id = %s";
                $res   = $ilDB->queryF($query, array('integer'), array($user->getId()));
                $row   = $res->fetchRow(DB_FETCHMODE_OBJECT);
                if($row->ts == null)
                {
                        self::sendReminder($user, $reminderTime, $time_frame_for_deletion);
                        return true;
                }
                return false;
        }

        public static function flushDataTable()
        {
                global $ilDB;
                $ilDB->manipulate("DELETE FROM " . self::TABLE_NAME);
        }

        public static function removeSingleUserFromTable($usr_id)
        {
                global $ilDB;
                $query = "DELETE FROM " . self::TABLE_NAME . " WHERE usr_id = %s";
                $ilDB->manipulateF($query, array('integer'), array($usr_id));
        }
}