class.ilMail.php

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<?php
/* Copyright (c) 1998-2012 ILIAS open source, Extended GPL, see docs/LICENSE */
 
require_once 'Services/User/classes/class.ilObjUser.php';
 
class ilMail
{
        var $ilias;
 
        var $lng;
 
        var $mfile;
 
        var $mail_options;
 
        var $user_id;
 
        var $table_mail;
 
        var $table_mail_saved;
 
        var $mail_counter;
 
        var $mail_data;
 
 
        var $mail_obj_ref_id;
 
        var $mail_send_type;
 
        var $save_in_sentbox;
 
        var $mail_rcp_to;
        var $mail_rcp_cc;
        var $mail_rcp_bc;
        var $mail_subject;
        var $mail_message;
        var $mail_use_placeholders = 0;
 
        var $soap_enabled = true;
        var $mail_to_global_roles = 0;
 
        private $use_pear = true;
        protected $appendInstallationSignature = false;
 
        const ILIAS_HOST = 'ilias';
        
        protected $properties = array();
        
        protected static $userInstances = array();
 
        public function __construct($a_user_id)
        {
                require_once "./Services/Mail/classes/class.ilFileDataMail.php";
                require_once "Services/Mail/classes/class.ilMailOptions.php";
 
                global $ilias, $lng, $ilUser;
 
                $lng->loadLanguageModule("mail");
 
                // Initiate variables
                $this->ilias =& $ilias;
                $this->lng   =& $lng;
                $this->table_mail = 'mail';
                $this->table_mail_saved = 'mail_saved';
                $this->user_id = $a_user_id;
                $this->mfile = new ilFileDataMail($this->user_id);
                $this->mail_options = new ilMailOptions($a_user_id);            
 
                // DEFAULT: sent mail aren't stored insentbox of user.
                $this->setSaveInSentbox(false);
 
                // GET REFERENCE ID OF MAIL OBJECT
                $this->readMailObjectReferenceId();
        }
        
        public function __get($name)
        {
                global $ilUser;
                
                if(isset($this->properties[$name]))
                {
                        return $this->properties[$name];
                }
                
                // Used to include files / instantiate objects at runtime
                if($name == 'mlists')
                {
                        if(is_object($ilUser))
                        {
                                require_once 'Services/Contact/classes/class.ilMailingLists.php';
                                $this->properties[$name] = new ilMailingLists($ilUser);
                                return $this->properties[$name];
                        }
                }
        }
 
        public function doesRecipientStillExists($a_recipient, $a_existing_recipients)
        {
                if(self::_usePearMail())
                {
                        $recipients = $this->explodeRecipients($a_existing_recipients);
                        if(is_a($recipients, 'PEAR_Error'))
                        {
                                return false;
                        }
                        else
                        {
                                foreach($recipients as $rcp)
                                {
                                        if (substr($rcp->mailbox, 0, 1) != '#')
                                        {
                                                if(trim($rcp->mailbox) == trim($a_recipient) ||
                                                   trim($rcp->mailbox.'@'.$rcp->host) == trim($a_recipient))
                                                {
                                                        return true;
                                                }
                                        }
                                        else if (substr($rcp->mailbox, 0, 7) == '#il_ml_')
                                        {
                                                if(trim($rcp->mailbox.'@'.$rcp->host) == trim($a_recipient))
                                                {
                                                        return true;
                                                }
                                        }
                                        else
                                        {
                                                if(trim($rcp->mailbox.'@'.$rcp->host) == trim($a_recipient))
                                                {
                                                        return true;
                                                }
                                        }
                                }
                        }
                }
                else
                {
                        $recipients = $this->explodeRecipients($a_existing_recipients);
                        if(count($recipients))
                        {
                                foreach($recipients as $recipient)
                                {
                                        if(trim($recipient) == trim($a_recipient))
                                        {
                                                return true;
                                        }
                                }
                        }
                }
 
                return false;
        }
 
        function enableSOAP($a_status)
        {
                $this->soap_enabled = $a_status;
        }
        function isSOAPEnabled()
        {
                global $ilSetting;
 
                if(!extension_loaded('curl') || !$ilSetting->get('soap_user_administration'))
                {
                        return false;
                }
                
                // Prevent using SOAP in cron context
                if(ilContext::getType() == ilContext::CONTEXT_CRON)
                {
                        return false;
                }
 
                return (bool) $this->soap_enabled;
        }
 
 
        function setSaveInSentbox($a_save_in_sentbox)
        {
                $this->save_in_sentbox = $a_save_in_sentbox;
        }
 
        function getSaveInSentbox()
        {
                return $this->save_in_sentbox;
        }
 
        function setMailSendType($a_types)
        {
                $this->mail_send_type = $a_types;
        }
 
        function setMailRcpTo($a_rcp_to)
        {
                $this->mail_rcp_to = $a_rcp_to;
        }
 
        function setMailRcpCc($a_rcp_cc)
        {
                $this->mail_rcp_cc = $a_rcp_cc;
        }
 
        function setMailRcpBc($a_rcp_bc)
        {
                $this->mail_rcp_bc = $a_rcp_bc;
        }
 
        function setMailSubject($a_subject)
        {
                $this->mail_subject = $a_subject;
        }
 
        function setMailMessage($a_message)
        {
                $this->mail_message = $a_message;
        }
 
        function readMailObjectReferenceId()
        {
                include_once 'Services/Mail/classes/class.ilMailGlobalServices.php';
                $this->mail_obj_ref_id = ilMailGlobalServices::getMailObjectRefId();
        }
 
        function getMailObjectReferenceId()
        {
                return $this->mail_obj_ref_id;
        }
 
        public function formatNamesForOutput($users = '')
        {
                $users = trim($users);
                if($users)
                {
                        if(strstr($users, ','))
                        {
                                $rcp_to_array = array();
 
                                $recipients = explode(',', $users);
                                foreach($recipients as $recipient)
                                {
                                        $recipient = trim($recipient);
                                        if($uid = ilObjUser::_lookupId($recipient))
                                        {
                                                if (in_array(ilObjUser::_lookupPref($uid, 'public_profile'), array("y", "g")))
                                                {
                                                        $tmp_obj = self::getCachedUserInstance($uid);
                                                        $rcp_to_array[] = $tmp_obj->getFullname().' ['.$recipient.']';
                                                }
                                                else
                                                {
                                                        $rcp_to_array[] = $recipient;
                                                }
                                        }
                                        else
                                        {
                                                $rcp_to_array[] = $recipient;
                                        }
                                }
 
                                return trim(implode(', ', $rcp_to_array));
                        }
                        else
                        {
                                if($uid = ilObjUser::_lookupId($users))
                                {                                       
                                        if (in_array(ilObjUser::_lookupPref($uid, 'public_profile'), array("y", "g")))
                                        {
                                                $tmp_obj = self::getCachedUserInstance($uid);
                                                return $tmp_obj->getFullname().' ['.$users.']';
                                        }
                                        else
                                        {
                                                return $users;
                                        }
                                }
                                else
                                {
                                        return $users;
                                }
                        }
                }
                else
                {
                        return $this->lng->txt('not_available');
                }
        }
 
        function getPreviousMail($a_mail_id)
        {
                global $ilDB;
 
                $ilDB->setLimit(1);
                $res = $ilDB->queryf("
                        SELECT b.* FROM " . $this->table_mail ." a
                        INNER JOIN ".$this->table_mail ." b ON b.folder_id = a.folder_id
                        AND b.user_id = a.user_id AND b.send_time > a.send_time
                        WHERE a.user_id = %s
                        AND a.mail_id = %s ORDER BY b.send_time ASC",
                        array('integer', 'integer'),
                        array($this->user_id, $a_mail_id));
 
                $this->mail_data = $this->fetchMailData($res->fetchRow(DB_FETCHMODE_OBJECT));
 
                return $this->mail_data;
        }
 
        function getNextMail($a_mail_id)
        {
                global $ilDB;
 
                $ilDB->setLimit(1);
                $res = $ilDB->queryf("
                        SELECT b.* FROM " . $this->table_mail ." a
                        INNER JOIN ".$this->table_mail ." b ON b.folder_id = a.folder_id
                        AND b.user_id = a.user_id AND b.send_time < a.send_time
                        WHERE a.user_id = %s
                        AND a.mail_id = %s ORDER BY b.send_time DESC",
                        array('integer', 'integer'),
                        array($this->user_id, $a_mail_id));
 
                $this->mail_data = $this->fetchMailData($res->fetchRow(DB_FETCHMODE_OBJECT));
 
                return $this->mail_data;
        }
 
        function getMailsOfFolder($a_folder_id, $filter = array())
        {
                global $ilDB;
 
                $this->mail_counter = array();
                $this->mail_counter['read'] = 0;
                $this->mail_counter['unread'] = 0;
 
        $query = "SELECT sender_id, m_subject, mail_id, m_status, send_time FROM ". $this->table_mail ."
                        LEFT JOIN object_data ON obj_id = sender_id
                        WHERE user_id = %s
                        AND folder_id = %s
                        AND ((sender_id > 0 AND sender_id IS NOT NULL AND obj_id IS NOT NULL) OR (sender_id = 0 OR sender_id IS NULL)) ";
 
        if($filter['status'])
        {
            $query .= ' AND m_status = '.$ilDB->quote($filter['status'], 'text');
        }
        if($filter['type'])
        {
            $query .= ' AND '.$ilDB->like('m_type', 'text', '%%:"'.$filter['type'].'"%%', false);
        }
 
        $query .= " ORDER BY send_time DESC";
 
                $res = $ilDB->queryf($query,
                        array('integer', 'integer'),
                        array($this->user_id, $a_folder_id));
 
                while ($row = $ilDB->fetchObject($res))
                {
                        $tmp = $this->fetchMailData($row);
 
                        if($tmp['m_status'] == 'read')
                        {
                                ++$this->mail_counter['read'];
                        }
 
                        if($tmp['m_status'] == 'unread')
                        {
                                ++$this->mail_counter['unread'];
                        }
 
                        $output[] = $tmp;
                }
 
                $this->mail_counter['total'] = count($output);
 
                return $output ? $output : array();
        }
 
        function countMailsOfFolder($a_folder_id)
        {
                global $ilDB;
 
                $res = $ilDB->queryf("
                        SELECT COUNT(*) FROM ". $this->table_mail ."
                        WHERE user_id = %s
                        AND folder_id = %s",
                        array('integer', 'integer'),
                        array($this->user_id, $a_folder_id));
 
                return $res->numRows();
        }
 
        function deleteMailsOfFolder($a_folder_id)
        {
                if ($a_folder_id)
                {
                        global $ilDB;
 
                        /*$statement = $ilDB->manipulateF("
                                DELETE FROM ". $this->table_mail ."
                                WHERE user_id = %s
                                AND folder_id = %s",
                                array('integer', 'integer'),
                                array($this->user_id, $a_folder_id));*/
                        $mails = $this->getMailsOfFolder($a_folder_id);
                        foreach((array)$mails as $mail_data)
                        {
                                $this->deleteMails(array($mail_data['mail_id']));
                        }
 
                        return true;
                }
 
                return false;
        }
 
        function getMailCounterData()
        {
                return is_array($this->mail_counter) ? $this->mail_counter : array(
                        "total"  => 0,
                        "read"   => 0,
                        "unread" => 0);
        }
 
        function getMail($a_mail_id)
        {
                global $ilDB;
 
                $res = $ilDB->queryf("
                        SELECT * FROM ". $this->table_mail ."
                        WHERE user_id = %s
                        AND mail_id = %s",
                        array('integer', 'integer'),
                        array($this->user_id, $a_mail_id));
 
                $this->mail_data =$this->fetchMailData($res->fetchRow(DB_FETCHMODE_OBJECT));
 
                return $this->mail_data;
        }
 
        function markRead($a_mail_ids)
        {
 
                global $ilDB;
 
                $data = array();
                $data_types = array();
 
                $query = "UPDATE ". $this->table_mail ."
                                SET m_status = %s
                                WHERE user_id = %s ";
                array_push($data_types, 'text', 'integer');
                array_push($data, 'read', $this->user_id);
 
                $cnt_mail_ids = count($a_mail_ids);
 
                        if (is_array($a_mail_ids) &&
                        count($a_mail_ids) > 0)
                {
 
                        $in = 'mail_id IN (';
                        $counter = 0;
                        foreach($a_mail_ids as $a_mail_id)
                        {
                                array_push($data, $a_mail_id);
                                array_push($data_types, 'integer');
 
                                if($counter > 0) $in .= ',';
                                $in .= '%s';
                                ++$counter;
                        }
                        $in .= ')';
 
                        $query .= ' AND '.$in;
                }
 
                $res = $ilDB->manipulateF($query, $data_types, $data);
 
                return true;
        }
 
        function markUnread($a_mail_ids)
        {
                global $ilDB;
 
                $data = array();
                $data_types = array();
 
                $query = "UPDATE ". $this->table_mail ."
                                SET m_status = %s
                                WHERE user_id = %s ";
                array_push($data_types, 'text', 'integer');
                array_push($data, 'unread', $this->user_id);
 
                $cnt_mail_ids = count($a_mail_ids);
 
                        if (is_array($a_mail_ids) &&
                        count($a_mail_ids) > 0)
                {
 
                        $in = 'mail_id IN (';
                        $counter = 0;
                        foreach($a_mail_ids as $a_mail_id)
                        {
                                array_push($data, $a_mail_id);
                                array_push($data_types, 'integer');
 
                                if($counter > 0) $in .= ',';
                                $in .= '%s';
                                ++$counter;
                        }
                        $in .= ')';
 
                        $query .= ' AND '.$in;
                }
 
                $statement = $ilDB->manipulateF($query, $data_types, $data);
 
                return true;
        }
 
        function moveMailsToFolder($a_mail_ids,$a_folder_id)
        {
                global $ilDB;
 
                $data = array();
                $data_types = array();
 
                $query = "UPDATE ". $this->table_mail ."
                                SET folder_id = %s
                                WHERE user_id = %s ";
                array_push($data_types, 'text', 'integer');
                array_push($data, $a_folder_id, $this->user_id);
 
                $cnt_mail_ids = count($a_mail_ids);
 
                        if (is_array($a_mail_ids) &&
                        count($a_mail_ids) > 0)
                {
 
                        $in = 'mail_id IN (';
                        $counter = 0;
                        foreach($a_mail_ids as $a_mail_id)
                        {
                                array_push($data, $a_mail_id);
                                array_push($data_types, 'integer');
 
                                if($counter > 0) $in .= ',';
                                $in .= '%s';
                                ++$counter;
                        }
                        $in .= ')';
 
                        $query .= ' AND '.$in;
                }
 
                $statement = $ilDB->manipulateF($query, $data_types, $data);
 
                return true;
        }
 
        function deleteMails($a_mail_ids)
        {
                global $ilDB;
 
                foreach ($a_mail_ids as $id)
                {
                        $statement = $ilDB->manipulateF("
                                DELETE FROM ". $this->table_mail ."
                                WHERE user_id = %s
                                AND mail_id = %s ",
                                array('integer', 'integer'),
                                array($this->user_id, $id));
 
                        $this->mfile->deassignAttachmentFromDirectory($id);
                }
 
                return true;
        }
 
        function fetchMailData($a_row)
        {
                if (!$a_row) return;
 
                return array(
                        "mail_id"         => $a_row->mail_id,
                        "user_id"         => $a_row->user_id,
                        "folder_id"       => $a_row->folder_id,
                        "sender_id"       => $a_row->sender_id,
                        "attachments"     => unserialize(stripslashes($a_row->attachments)),
                        "send_time"       => $a_row->send_time,
                        "rcp_to"          => $a_row->rcp_to,
                        "rcp_cc"          => $a_row->rcp_cc,
                        "rcp_bcc"         => $a_row->rcp_bcc,
                        "m_status"        => $a_row->m_status,
                        "m_type"          => unserialize(stripslashes($a_row->m_type)),
                        "m_email"         => $a_row->m_email,
                        "m_subject"       => $a_row->m_subject,
                        "m_message"       => $a_row->m_message,
                        "import_name"     => $a_row->import_name,
                        "use_placeholders"=> $a_row->use_placeholders);
        }
 
        function updateDraft($a_folder_id,
                                                 $a_attachments,
                                                 $a_rcp_to,
                                                 $a_rcp_cc,
                                                 $a_rcp_bcc,
                                                 $a_m_type,
                                                 $a_m_email,
                                                 $a_m_subject,
                                                 $a_m_message,
                                                 $a_draft_id = 0, $a_use_placeholders = 0)
        {
                global $ilDB;
 
                $ilDB->update($this->table_mail,
                        array(
                                'folder_id'                     => array('integer', $a_folder_id),
                                'attachments'           => array('clob', serialize($a_attachments)),
                                'send_time'                     => array('timestamp', date('Y-m-d H:i:s', time())),
                                'rcp_to'                        => array('clob', $a_rcp_to), 
                                'rcp_cc'                        => array('clob', $a_rcp_cc),
                                'rcp_bcc'                       => array('clob', $a_rcp_bcc),
                                'm_status'                      => array('text', 'read'),
                                'm_type'                        => array('text', serialize($a_m_type)),
                                'm_email'                       => array('integer', $a_m_email),
                                'm_subject'                     => array('text', $a_m_subject),
                                'm_message'                     => array('clob', $a_m_message),
                                'use_placeholders'      => array('integer', $a_use_placeholders)
                        ),
                        array(
                                'mail_id'                       => array('integer', $a_draft_id)
                        )
                );
 
                return $a_draft_id;
        }
 
        function sendInternalMail($a_folder_id,
                                                          $a_sender_id,
                                                          $a_attachments,
                                                          $a_rcp_to,
                                                          $a_rcp_cc,
                                                          $a_rcp_bcc,
                                                          $a_status,
                                                          $a_m_type,
                                                          $a_m_email,
                                                          $a_m_subject,
                                                          $a_m_message,
                                                          $a_user_id = 0, $a_use_placeholders = 0)
        {
                $a_user_id = $a_user_id ? $a_user_id : $this->user_id;
 
                global $ilDB, $log;
                //$log->write('class.ilMail->sendInternalMail to user_id:'.$a_rcp_to.' '.$a_m_message);
 
                if ($a_use_placeholders)
                {
                        $a_m_message = $this->replacePlaceholders($a_m_message, $a_user_id);
                }
                else
                {
                        $a_use_placeholders = '0';
                }
 
                
                if(!$a_user_id)         $a_user_id = '0';
                if(!$a_folder_id)       $a_folder_id = '0';
                if(!$a_sender_id)       $a_sender_id = NULL;
                if(!$a_attachments)     $a_attachments = NULL;
                if(!$a_rcp_to)          $a_rcp_to = NULL;
                if(!$a_rcp_cc)          $a_rcp_cc = NULL;
                if(!$a_rcp_bcc)         $a_rcp_bcc = NULL;
                if(!$a_status)          $a_status = NULL;
                if(!$a_m_type)          $a_m_type = NULL;
                if(!$a_m_email)         $a_m_email = NULL;
                if(!$a_m_subject)       $a_m_subject = NULL;
                if(!$a_m_message)       $a_m_message = NULL;
                
 
                $next_id = $ilDB->nextId($this->table_mail);
 
                $ilDB->insert($this->table_mail, array(
                        'mail_id'               => array('integer', $next_id),
                        'user_id'               => array('integer', $a_user_id),
                        'folder_id'             => array('integer', $a_folder_id),
                        'sender_id'             => array('integer', $a_sender_id),
                        'attachments'   => array('clob', serialize($a_attachments)),
                        'send_time'             => array('timestamp', date('Y-m-d H:i:s', time())),
                        'rcp_to'                => array('clob', $a_rcp_to),
                        'rcp_cc'                => array('clob', $a_rcp_cc),
                        'rcp_bcc'               => array('clob', $a_rcp_bcc),
                        'm_status'              => array('text', $a_status),
                        'm_type'                => array('text', serialize($a_m_type)),
                        'm_email'               => array('integer', $a_m_email),
                        'm_subject'             => array('text', $a_m_subject),
                        'm_message'             => array('clob', $a_m_message)
                ));
 
                return $next_id; //$ilDB->getLastInsertId();
 
        }
 
        function replacePlaceholders($a_message, $a_user_id)
        {
                global $lng;
 
                $user = self::getCachedUserInstance($a_user_id);
 
                // determine salutation
                switch ($user->getGender())
                {
                        case 'f':       $gender_salut = $lng->txt('salutation_f');
                                                break;
                        case 'm':       $gender_salut = $lng->txt('salutation_m');
                                                break;
        }
 
                $a_message = str_replace('[MAIL_SALUTATION]', $gender_salut, $a_message);
                $a_message = str_replace('[LOGIN]', $user->getLogin(), $a_message);
                $a_message = str_replace('[FIRST_NAME]', $user->getFirstname(), $a_message);
                $a_message = str_replace('[LAST_NAME]', $user->getLastname(), $a_message);
                $a_message = str_replace('[ILIAS_URL]', ILIAS_HTTP_PATH.'/login.php?client_id='.CLIENT_ID, $a_message);
                $a_message = str_replace('[CLIENT_NAME]', CLIENT_NAME, $a_message);
 
                return $a_message;
        }
 
        function distributeMail($a_rcp_to,$a_rcp_cc,$a_rcp_bcc,$a_subject,$a_message,$a_attachments,$sent_mail_id,$a_type,$a_action, $a_use_placeholders = 0)
        {
                global $log;
 
                include_once 'Services/Mail/classes/class.ilMailbox.php';
                include_once './Services/User/classes/class.ilObjUser.php';
 
                if (!ilMail::_usePearMail())
                {
                        // REPLACE ALL LOGIN NAMES WITH '@' BY ANOTHER CHARACTER
                        $a_rcp_to = $this->__substituteRecipients($a_rcp_to, 'resubstitute');
                        $a_rcp_cc = $this->__substituteRecipients($a_rcp_cc, 'resubstitute');
                        $a_rcp_bcc = $this->__substituteRecipients($a_rcp_bcc, 'resubstitute');
                }
 
                $mbox = new ilMailbox();
 
                if (!$a_use_placeholders) # No Placeholders
                {
                        $rcp_ids = $this->getUserIds(trim($a_rcp_to).','.trim($a_rcp_cc).','.trim($a_rcp_bcc));
 
                        $as_email = array();
 
                        foreach($rcp_ids as $id)
                        {
                                $tmp_mail_options = new ilMailOptions($id);
 
                                // DETERMINE IF THE USER CAN READ INTERNAL MAILS
                                $tmp_user = self::getCachedUserInstance($id);
                                $user_is_active = $tmp_user->getActive();
                                $user_can_read_internal_mails = !$tmp_user->hasToAcceptTermsOfService() && $tmp_user->checkTimeLimit();
 
                                // CONTINUE IF SYSTEM MESSAGE AND USER CAN'T READ INTERNAL MAILS
                                if (in_array('system', $a_type) && !$user_can_read_internal_mails)
                                {
                                        continue;
                                }
 
                                // CONTINUE IF USER CAN'T READ INTERNAL MAILS OR IF HE/SHE WANTS HIS/HER MAIL
                                // SENT TO HIS/HER EXTERNAL E-MAIL ADDRESS ONLY
 
                                // Do not send external mails to inactive users!!!
                                if($user_is_active)
                                {
                                        if (!$user_can_read_internal_mails ||
                                                $tmp_mail_options->getIncomingType() == $this->mail_options->EMAIL)
                                        {
                                                $as_email[] = $tmp_user->getEmail();
                                                continue;
                                        }
 
                                        if ($tmp_mail_options->getIncomingType() == $this->mail_options->BOTH)
                                        {
                                                $as_email[] = $tmp_user->getEmail();
                                        }
                                }
                                $mbox->setUserId($id);
                                $inbox_id = $mbox->getInboxFolder();
 
                                $mail_id = $this->sendInternalMail($inbox_id, $this->user_id,
                                                                          $a_attachments, $a_rcp_to,
                                                                          $a_rcp_cc, '', 'unread', $a_type,
                                                                          0, $a_subject, $a_message, $id, 0);
                                if ($a_attachments)
                                {
                                        $this->mfile->assignAttachmentsToDirectory($mail_id, $sent_mail_id, $a_attachments);
                                }
                        }
 
                        // SEND EMAIL TO ALL USERS WHO DECIDED 'email' or 'both'
                        $to = array();
                        $bcc = array();
 
                        if(count($as_email) == 1)
                        {
                                $to[] = $as_email[0];
                        }
                        else
                        {
                                foreach ($as_email as $email)
                                {
                                        $bcc[] = $email;
                                }
                        }
 
                        if(count($to) > 0 || count($bcc) > 0)
                        {
                                $this->sendMimeMail(implode(',', $to), '', implode(',', $bcc), $a_subject, $a_message, $a_attachments);
                        }
                }
                else # Use Placeholders
                {
                        // to
                        $rcp_ids_replace = $this->getUserIds(trim($a_rcp_to));
 
                        // cc / bcc
                        $rcp_ids_no_replace = $this->getUserIds(trim($a_rcp_cc).','.trim($a_rcp_bcc));
 
                        $as_email = array();
 
                        // to
                        foreach($rcp_ids_replace as $id)
                        {
                                $tmp_mail_options = new ilMailOptions($id);
 
                                // DETERMINE IF THE USER CAN READ INTERNAL MAILS
                                $tmp_user = self::getCachedUserInstance($id);
                                $user_is_active = $tmp_user->getActive();
                                $user_can_read_internal_mails = !$tmp_user->hasToAcceptTermsOfService() && $tmp_user->checkTimeLimit();
 
                                // CONTINUE IF SYSTEM MESSAGE AND USER CAN'T READ INTERNAL MAILS
                                if (in_array('system', $a_type) && !$user_can_read_internal_mails)
                                {
                                        continue;
                                }
 
                                // CONTINUE IF USER CAN'T READ INTERNAL MAILS OR IF HE/SHE WANTS HIS MAIL
                                // SENT TO HIS/HER EXTERNAL E-MAIL ADDRESS ONLY
 
                                // Do not send external mails to inactive users!!!
                                if($user_is_active)
                                {
                                        if (!$user_can_read_internal_mails ||
                                                $tmp_mail_options->getIncomingType() == $this->mail_options->EMAIL)
                                        {
                                                $as_email[$tmp_user->getId()] = $tmp_user->getEmail();
                                                continue;
                                        }
 
                                        if ($tmp_mail_options->getIncomingType() == $this->mail_options->BOTH)
                                        {
                                                $as_email[$tmp_user->getId()] = $tmp_user->getEmail();
                                        }
                                }
                                $mbox->setUserId($id);
                                $inbox_id = $mbox->getInboxFolder();
 
                                $mail_id = $this->sendInternalMail($inbox_id, $this->user_id,
                                                                          $a_attachments, $a_rcp_to,
                                                                          $a_rcp_cc, '', 'unread', $a_type,
                                                                          0, $a_subject, $a_message, $id, 1);
                                if ($a_attachments)
                                {
                                        $this->mfile->assignAttachmentsToDirectory($mail_id, $sent_mail_id, $a_attachments);
                                }
                        }
 
                        if (count($as_email))
                        {
                                foreach ($as_email as $id => $email)
                                {
                                        $this->sendMimeMail($email, '', '', $a_subject, $this->replacePlaceholders($a_message, $id), $a_attachments);
                                }
                        }
 
                        $as_email = array();
 
                        // cc / bcc
                        foreach($rcp_ids_no_replace as $id)
                        {
                                $tmp_mail_options = new ilMailOptions($id);
 
                                // DETERMINE IF THE USER CAN READ INTERNAL MAILS
                                $tmp_user = self::getCachedUserInstance($id);
                                $user_is_active = $tmp_user->getActive();
                                $user_can_read_internal_mails = !$tmp_user->hasToAcceptTermsOfService() && $tmp_user->checkTimeLimit();
 
                                // Do not send external mails to inactive users!!!
                                if($user_is_active)
                                {
                                        // CONTINUE IF SYSTEM MESSAGE AND USER CAN'T READ INTERNAL MAILS
                                        if (in_array('system', $a_type) && !$user_can_read_internal_mails)
                                        {
                                                continue;
                                        }
 
                                        // CONTINUE IF USER CAN'T READ INTERNAL MAILS OR IF HE/SHE WANTS HIS MAIL
                                        // SENT TO HIS/HER EXTERNAL E-MAIL ADDRESS ONLY
                                        if (!$user_can_read_internal_mails ||
                                                $tmp_mail_options->getIncomingType() == $this->mail_options->EMAIL)
                                        {
                                                $as_email[] = $tmp_user->getEmail();
                                                continue;
                                        }
 
                                        if ($tmp_mail_options->getIncomingType() == $this->mail_options->BOTH)
                                        {
                                                $as_email[] = $tmp_user->getEmail();
                                        }
                                }
                                $mbox->setUserId($id);
                                $inbox_id = $mbox->getInboxFolder();
 
                                $mail_id = $this->sendInternalMail($inbox_id, $this->user_id,
                                                                          $a_attachments, $a_rcp_to,
                                                                          $a_rcp_cc, '', 'unread', $a_type,
                                                                          0, $a_subject, $a_message, $id, 0);
                                if ($a_attachments)
                                {
                                        $this->mfile->assignAttachmentsToDirectory($mail_id, $sent_mail_id, $a_attachments);
                                }
                        }
 
                        if (count($as_email))
                        {
                                $this->sendMimeMail('', '', implode(',', $as_email), $a_subject, $a_message, $a_attachments);
                        }
                }
 
                return true;
        }
 
        function getUserIds($a_recipients)
        {
                global $log, $rbacreview;
                $ids = array();
 
                $this->validatePear($a_recipients);
                if (ilMail::_usePearMail() && $this->getUsePear() == true)
                {
                        $tmp_names = $this->explodeRecipients($a_recipients );
                        if (! is_a($tmp_names, 'PEAR_Error'))
                        {
                                for ($i = 0;$i < count($tmp_names); $i++)
                                {
                                        if (substr($tmp_names[$i]->mailbox,0,1) == '#' || substr($tmp_names[$i]->mailbox,0,2) == '"#')
                                        {
                                                $role_ids = $rbacreview->searchRolesByMailboxAddressList($tmp_names[$i]->mailbox.'@'.$tmp_names[$i]->host);
                                                foreach($role_ids as $role_id)
                                                {
                                                        foreach($rbacreview->assignedUsers($role_id) as $usr_id)
                                                        {
                                                                $ids[] = $usr_id;
                                                        }
                                                }
                                        }
                                        else if (strtolower($tmp_names[$i]->host) == self::ILIAS_HOST)
                                        {
                                                if ($id = ilObjUser::getUserIdByLogin(addslashes($tmp_names[$i]->mailbox)))
                                                {
                                                        //$log->write('class.ilMail->getUserIds() recipient:'.$tmp_names[$i]->mailbox.'@'.$tmp_names[$i]->host.' user_id:'.$id);
                                                        $ids[] = $id;
                                                }
                                                else
                                                {
                                                        //$log->write('class.ilMail->getUserIds() no user account found for recipient:'.$tmp_names[$i]->mailbox.'@'.$tmp_names[$i]->host);
                                                }
                                        }
                                        else
                                        {
                                                // Fixed mantis bug #5875
                                                if($id = ilObjUser::_lookupId($tmp_names[$i]->mailbox.'@'.$tmp_names[$i]->host))
                                                {
                                                        $ids[] = $id;
                                                }
                                                else
                                                {
                                                //$log->write('class.ilMail->getUserIds() external recipient:'.$tmp_names[$i]->mailbox.'@'.$tmp_names[$i]->host);
                                                }
                                        }
                                }
                        }
                        else
                        {
                                //$log->write('class.ilMail->getUserIds() illegal recipients:'.$a_recipients);
                        }
                }
                else
                {
                        $tmp_names = $this->explodeRecipients($a_recipients,  $this->getUsePear());
                        for ($i = 0;$i < count($tmp_names); $i++)
                        {
                                if (substr($tmp_names[$i],0,1) == '#' || substr($tmp_names[$i], 0, 2) == '"#')
                                {
                                        if(ilUtil::groupNameExists(addslashes(substr($tmp_names[$i],1))))
                                        {
                                                include_once("./Services/Object/classes/class.ilObjectFactory.php");
                                                include_once('./Modules/Group/classes/class.ilObjGroup.php');
 
                                                foreach(ilObject::_getAllReferences(ilObjGroup::_lookupIdByTitle(addslashes(substr($tmp_names[$i],1)))) as $ref_id)
                                                {
                                                        $grp_object = ilObjectFactory::getInstanceByRefId($ref_id);
                                                        break;
                                                }
                                                // STORE MEMBER IDS IN $ids
                                                foreach ($grp_object->getGroupMemberIds() as $id)
                                                {
                                                        $ids[] = $id;
                                                }
                                        }
                                        // is role: get role ids
                                        elseif($role_id = $rbacreview->roleExists(addslashes(substr($tmp_names[$i],1))))
                                        {
                                                foreach($rbacreview->assignedUsers($role_id) as $usr_id)
                                                {
                                                        $ids[] = $usr_id;
                                                }
                                        }
 
                                }
                                else if (!empty($tmp_names[$i]))
                                {
                                        if ($id = ilObjUser::getUserIdByLogin(addslashes($tmp_names[$i])))
                                        {
                                                $ids[] = $id;
                                        }
                                }
                        }
                }
                return array_unique($ids);
        }
 
        function checkMail($a_rcp_to,$a_rcp_cc,$a_rcp_bcc,$a_m_subject,$a_m_message,$a_type)
        {
                $error_message = '';
 
                $a_m_subject = trim($a_m_subject);
                $a_rcp_to = trim($a_rcp_to);
 
                if (empty($a_m_subject))
                {
                        $error_message .= $error_message ? "<br>" : '';
                        $error_message .= $this->lng->txt("mail_add_subject");
                }
 
                if (empty($a_rcp_to))
                {
                        $error_message .= $error_message ? "<br>" : '';
                        $error_message .= $this->lng->txt("mail_add_recipient");
                }
 
                return $error_message;
        }
 
        function getEmailsOfRecipients($a_rcp)
        {
                global $rbacreview;
                
                $addresses = array();
 
                $this->validatePear($a_rcp);
                if (ilMail::_usePearMail() && $this->getUsePear())
                {
                        $tmp_rcp = $this->explodeRecipients($a_rcp);
                        if (! is_a($tmp_rcp, 'PEAR_Error'))
                        {
                                foreach ($tmp_rcp as $rcp)
                                {
                                        // NO GROUP
                                        if (substr($rcp->mailbox,0,1) != '#' && substr($rcp->mailbox,0, 2) != '"#')
                                        {
                                                if (strtolower($rcp->host) != self::ILIAS_HOST)
                                                {
                                                        $addresses[] = $rcp->mailbox.'@'.$rcp->host;
                                                        continue;
                                                }
 
                                                if ($id = ilObjUser::getUserIdByLogin(addslashes($rcp->mailbox)))
                                                {
                                                        $tmp_user = self::getCachedUserInstance($id);
                                                        $addresses[] = $tmp_user->getEmail();
                                                        continue;
                                                }
                                        }
                                        else
                                        {
                                                // Roles
                                                $role_ids = $rbacreview->searchRolesByMailboxAddressList($rcp->mailbox.'@'.$rcp->host);
                                                foreach($role_ids as $role_id)
                                                {
                                                        foreach($rbacreview->assignedUsers($role_id) as $usr_id)
                                                        {
                                                                $tmp_user = self::getCachedUserInstance($usr_id);
                                                                $addresses[] = $tmp_user->getEmail();
                                                        }
                                                }
                                        }
                                }
                        }
                }
                else
                {
                        $tmp_rcp = $this->explodeRecipients($a_rcp, $this->getUsePear());
 
                        foreach ($tmp_rcp as $rcp)
                        {
                                // NO GROUP
                                if (substr($rcp,0,1) != '#' && substr($rcp,0,2) != '"#')
                                {
                                        if (strpos($rcp,'@'))
                                        {
                                                $addresses[] = $rcp;
                                                continue;
                                        }
 
                                        if ($id = ilObjUser::getUserIdByLogin(addslashes($rcp)))
                                        {
                                                $tmp_user = self::getCachedUserInstance($id);
                                                $addresses[] = $tmp_user->getEmail();
                                                continue;
                                        }
                                }
                                else
                                {
                                        // GROUP THINGS
                                        include_once("./Services/Object/classes/class.ilObjectFactory.php");
                                        include_once('./Modules/Group/classes/class.ilObjGroup.php');
 
                                        // Fix
                                        foreach(ilObjGroup::_getAllReferences(ilObjGroup::_lookupIdByTitle(addslashes(substr($rcp,1)))) as $ref_id)
                                        {
                                                $grp_object = ilObjectFactory::getInstanceByRefId($ref_id);
                                                break;
                                        }
                                        // GET EMAIL OF MEMBERS AND STORE THEM IN $addresses
                                        foreach ($grp_object->getGroupMemberIds() as $id)
                                        {
                                                $tmp_user = self::getCachedUserInstance($id);
                                                $addresses[] = $tmp_user->getEmail();
                                        }
                                }
                        }
                }
 
                return $addresses;
        }
 
        function checkRecipients($a_recipients)
        {
                global $rbacsystem,$rbacreview;
                $wrong_rcps = '';
 
                $this->validatePear($a_recipients);
                if (ilMail::_usePearMail() && $this->getUsePear())
                {
                        $tmp_rcp = $this->explodeRecipients($a_recipients, $this->getUsePear());
 
                        if (is_a($tmp_rcp, 'PEAR_Error'))
                        {
                                $colon_pos = strpos($tmp_rcp->message, ':');
                                $wrong_rcps = '<br />'.(($colon_pos === false) ? $tmp_rcp->message : substr($tmp_rcp->message, $colon_pos+2));
                        }
                        else
                        {
                                foreach ($tmp_rcp as $rcp)
                                {
                                        // NO ROLE MAIL ADDRESS
                                        if (substr($rcp->mailbox,0,1) != '#' && substr($rcp->mailbox,0,2) != '"#')
                                        {
                                                // ALL RECIPIENTS MUST EITHER HAVE A VALID LOGIN OR A VALID EMAIL
                                                $user_id = ($rcp->host == self::ILIAS_HOST) ? ilObjUser::getUserIdByLogin(addslashes($rcp->mailbox)) : false;
                                                if ($user_id == false && $rcp->host == self::ILIAS_HOST)
                                                {
                                                        $wrong_rcps .= "<br />".htmlentities($rcp->mailbox);
                                                        continue;
                                                }
 
                                                // CHECK IF USER CAN RECEIVE MAIL
                                                if ($user_id)
                                                {
                                                        if(!$rbacsystem->checkAccessOfUser($user_id, "internal_mail", $this->getMailObjectReferenceId()))
                                                        {
                                                                $wrong_rcps .= "<br />".htmlentities($rcp->mailbox).
                                                                        " (".$this->lng->txt("user_cant_receive_mail").")";
                                                                continue;
                                                        }
                                                }
                                                        }
                                        else if (substr($rcp->mailbox, 0, 7) == '#il_ml_')
                                        {
                                                if (!$this->mlists->mailingListExists($rcp->mailbox))
                                                {
                                                        $wrong_rcps .= "<br />".htmlentities($rcp->mailbox).
                                                                " (".$this->lng->txt("mail_no_valid_mailing_list").")";
                                                }
 
                                                continue;
                                        }
                                        else
                                        {
 
                                                $role_ids = $rbacreview->searchRolesByMailboxAddressList($rcp->mailbox.'@'.$rcp->host);
 
                                                if(!$this->mail_to_global_roles && is_array($role_ids))
                                                {
                                                        foreach($role_ids as $role_id)
                                                        {       
                                                                if($rbacreview->isGlobalRole($role_id))
                                                                {
                                                                        include_once('Services/Mail/exceptions/class.ilMailException.php');
                                                                        throw new ilMailException('mail_to_global_roles_not_allowed');
 
                                                                }
                                                        }
                                                }
                                                if (count($role_ids) == 0)
                                                {
                                                        $wrong_rcps .= '<br />'.htmlentities($rcp->mailbox).
                                                                ' ('.$this->lng->txt('mail_no_recipient_found').')';
                                                        continue;
                                                }
                                                else if (count($role_ids) > 1)
                                                {
                                                        $wrong_rcps .= '<br/>'.htmlentities($rcp->mailbox).
                                                                ' ('.sprintf($this->lng->txt('mail_multiple_recipients_found'), implode(',', $role_ids)).')';
                                                }
                                        }
                                }
                        }
                }
                else // NO PEAR
                {       
                        $tmp_rcp = $this->explodeRecipients($a_recipients, $this->getUsePear());
 
                        foreach ($tmp_rcp as $rcp)
                        {
                                if (empty($rcp))
                                {
                                        continue;
                                }
                                // NO GROUP
                                if (substr($rcp,0,1) != '#' && substr($rcp,0,2) != '"#')
                                {
                                        // ALL RECIPIENTS MUST EITHER HAVE A VALID LOGIN OR A VALID EMAIL
                                        if (!ilObjUser::getUserIdByLogin(addslashes($rcp)) and
                                                !ilUtil::is_email($rcp))
                                        {
                                                $wrong_rcps .= "<br />".htmlentities($rcp);
                                                continue;
                                        }
 
                                        // CHECK IF USER CAN RECEIVE MAIL
                                        if ($user_id = ilObjUser::getUserIdByLogin(addslashes($rcp)))
                                        {
                                                if(!$rbacsystem->checkAccessOfUser($user_id, "internal_mail", $this->getMailObjectReferenceId()))
                                                {
                                                        $wrong_rcps .= "<br />".htmlentities($rcp).
                                                                " (".$this->lng->txt("user_cant_receive_mail").")";
                                                        continue;
                                                }
                                        }
                                }
                                else if (substr($rcp, 0, 7) == '#il_ml_')
                                {
                                        if (!$this->mlists->mailingListExists($rcp))
                                        {
                                                $wrong_rcps .= "<br />".htmlentities($rcp).
                                                        " (".$this->lng->txt("mail_no_valid_mailing_list").")";
                                        }
 
                                        continue;
                                }
                                else if (ilUtil::groupNameExists(addslashes(substr($rcp,1))))
                                {
                                        continue;
                                }
                                else if (!$rbacreview->roleExists(addslashes(substr($rcp,1))))
                                {
                                        $wrong_rcps .= "<br />".htmlentities($rcp).
                                                " (".$this->lng->txt("mail_no_valid_group_role").")";
                                        continue;
                                }
                                else if (!$this->mail_to_global_roles)
                                {
                                        $role_id = $rbacreview->roleExists(addslashes(substr($rcp,1)));
                                        if((int)$role_id && $rbacreview->isGlobalRole($role_id))
                                        {
                                                include_once('Services/Mail/exceptions/class.ilMailException.php');
                                                throw new ilMailException('mail_to_global_roles_not_allowed');
                                        }
                                }
                        }
                }
                return $wrong_rcps;
        }
 
        function savePostData($a_user_id,
                                                  $a_attachments,
                                                  $a_rcp_to,
                                                  $a_rcp_cc,
                                                  $a_rcp_bcc,
                                                  $a_m_type,
                                                  $a_m_email,
                                                  $a_m_subject,
                                                  $a_m_message,
                                                  $a_use_placeholders)
        {
                global $ilDB;
 
                
                if(!$a_attachments) $a_attachments = NULL;
                if(!$a_rcp_to) $a_rcp_to = NULL;
                if(!$a_rcp_cc) $a_rcp_cc = NULL;
                if(!$a_rcp_bcc) $a_rcp_bcc = NULL;
                if(!$a_m_type) $a_m_type = NULL;
                if(!$a_m_email) $a_m_email = NULL;
                if(!$a_m_message) $a_m_message = NULL;
                if(!$a_use_placeholders) $a_use_placeholders = '0';
                
 
                $statement = $ilDB->manipulateF('
                        DELETE FROM '. $this->table_mail_saved .'
                        WHERE user_id = %s',
                        array('integer'), array($this->user_id));
 
                $ilDB->insert($this->table_mail_saved, array(
                        'user_id'                       => array('integer', $a_user_id),
                        'attachments'           => array('clob', serialize($a_attachments)),
                        'rcp_to'                        => array('clob', $a_rcp_to),
                        'rcp_cc'                        => array('clob', $a_rcp_cc),
                        'rcp_bcc'                       => array('clob', $a_rcp_bcc),
                        'm_type'                        => array('text', serialize($a_m_type)),
                        'm_email'                       => array('integer', $a_m_email),
                        'm_subject'                     => array('text', $a_m_subject),
                        'm_message'                     => array('clob', $a_m_message),
                        'use_placeholders'      => array('integer', $a_use_placeholders),
                ));
 
                $this->getSavedData();
 
                return true;
        }
 
        function getSavedData()
        {
                global $ilDB;
 
                $res = $ilDB->queryf('
                        SELECT * FROM '. $this->table_mail_saved .'
                        WHERE user_id = %s',
                        array('integer'),
                        array($this->user_id));
 
                $this->mail_data = $this->fetchMailData($res->fetchRow(DB_FETCHMODE_OBJECT));
 
                return $this->mail_data;
        }
 
        public function validateRecipients($a_rcp_to, $a_rcp_cc, $a_rcp_bc)
        {
                try
                {
                        $message = '';
 
                        if($error_message = $this->checkRecipients($a_rcp_to))
                        {
                                $message .= $error_message;
                        }
                        if($error_message = $this->checkRecipients($a_rcp_cc))
                        {
                                $message .= $error_message;
                        }
                        if($error_message = $this->checkRecipients($a_rcp_bc))
                        {
                                $message .= $error_message;
                        }
                        
                        if(strlen($message) > 0)
                        {
                                return $this->lng->txt('mail_following_rcp_not_valid') . $message;
                        }
 
                        return '';
                }
                catch(ilMailException $e)
                {
                        return $this->lng->txt('mail_following_rcp_not_valid') . $this->lng->txt($e->getMessage());
                }
        }
 
        function sendMail($a_rcp_to,$a_rcp_cc,$a_rcp_bc,$a_m_subject,$a_m_message,$a_attachment,$a_type, $a_use_placeholders = 0)
        {
                global $lng,$rbacsystem,$log;
                //$log->write('class.ilMail.sendMail '.$a_rcp_to.' '.$a_m_subject);
 
                $this->mail_to_global_roles = true;
                if($this->user_id != ANONYMOUS_USER_ID)
                {
                        $this->mail_to_global_roles = $rbacsystem->checkAccessOfUser($this->user_id, 'mail_to_global_roles', $this->mail_obj_ref_id);
                }
 
                if (in_array("system",$a_type))
                {
                        $a_type = array('system');
                }
 
                if ($a_attachment)
                {
                        if (!$this->mfile->checkFilesExist($a_attachment))
                        {
                                return "YOUR LIST OF ATTACHMENTS IS NOT VALID, PLEASE EDIT THE LIST";
                        }
                }
                // CHECK NECESSARY MAIL DATA FOR ALL TYPES
                if ($error_message = $this->checkMail($a_rcp_to,$a_rcp_cc,$a_rcp_bc,$a_m_subject,$a_m_message,$a_type))
                {
                        return $error_message;
                }
 
                $error_message = $this->validateRecipients($a_rcp_to, $a_rcp_cc, $a_rcp_bc);
                if(strlen($error_message) > 0)
                {
                        return $error_message;
                }
 
                // ACTIONS FOR ALL TYPES
                 
                
                // GET RCPT OF MAILING LISTS
                
                $rcp_to_list = $this->parseRcptOfMailingLists($a_rcp_to, true);
                $rcp_cc_list = $this->parseRcptOfMailingLists($a_rcp_cc, true);
                $rcp_bc_list = $this->parseRcptOfMailingLists($a_rcp_bc, true);
                        
                $rcp_to = $rcp_cc = $rcp_bc = array();          
                foreach($rcp_to_list as $mlist_id => $mlist_rec)
                {
                        if($mlist_id)
                        {
                                // internal mailing lists are sent as bcc
                                $mlist_id = substr($mlist_id, 7);
                                if($this->mlists->get($mlist_id)->getMode() == ilMailingList::MODE_TEMPORARY)
                                {
                                        $rcp_bc = array_merge($rcp_bc, $mlist_rec);
                                        continue;
                                }
                        }
                        
                        $rcp_to = array_merge($rcp_to, $mlist_rec);                     
                }
                foreach($rcp_cc_list as $mlist_id => $mlist_rec)
                {
                        if($mlist_id)
                        {
                                // internal mailing lists are sent as bcc
                                $mlist_id = substr($mlist_id, 7);
                                if($this->mlists->get($mlist_id)->getMode() == ilMailingList::MODE_TEMPORARY)
                                {
                                        $rcp_bc = array_merge($rcp_bc, $mlist_rec);
                                        continue;
                                }
                        }
                        
                        $rcp_cc = array_merge($rcp_cc, $mlist_rec);                     
                }
                foreach($rcp_bc_list as $mlist_id => $mlist_rec)
                {                       
                        $rcp_bc = array_merge($rcp_bc, $mlist_rec);                     
                }
                        
                $rcp_to = implode(',', $rcp_to);
                $rcp_cc = implode(',', $rcp_cc);
                $rcp_bc = implode(',', $rcp_bc);
                
 
                if (! ilMail::_usePearMail() )
                {
                        // REPLACE ALL LOGIN NAMES WITH '@' BY ANOTHER CHARACTER
                        $rcp_to = $this->__substituteRecipients($rcp_to,"substitute");
                        $rcp_cc = $this->__substituteRecipients($rcp_cc,"substitute");
                        $rcp_bc = $this->__substituteRecipients($rcp_bc,"substitute");
                }
 
                // COUNT EMAILS
                $c_emails = $this->__getCountRecipients($rcp_to,$rcp_cc,$rcp_bc,true);
                $c_rcp = $this->__getCountRecipients($rcp_to,$rcp_cc,$rcp_bc,false);
 
                // currently disabled..
                /*
                if (count($c_emails))
                {
                        if (!$this->getEmailOfSender())
                        {
                                return $lng->txt("mail_check_your_email_addr");
                        }
                }
                */
 
                // check smtp permission
                if($c_emails && $this->user_id != ANONYMOUS_USER_ID &&
                   !$rbacsystem->checkAccessOfUser($this->user_id, 'smtp_mail', $this->mail_obj_ref_id))
                {
                        return $this->lng->txt('mail_no_permissions_write_smtp');
                }
 
                if($this->appendInstallationSignature())
                {
                        $a_m_message .= self::_getInstallationSignature();
                }
 
                // save mail in sent box
                $sent_id = $this->saveInSentbox($a_attachment,$a_rcp_to,$a_rcp_cc,$a_rcp_bc,$a_type,
                                                                                $a_m_subject,$a_m_message);
 
                if($a_attachment)
                {
                        $this->mfile->assignAttachmentsToDirectory($sent_id,$sent_id);
 
                        if ($error = $this->mfile->saveFiles($sent_id,$a_attachment))
                        {
                                return $error;
                        }
                }
 
                // FILTER EMAILS
                // IF EMAIL RECIPIENT
                if($c_emails)
                {
                        $this->sendMimeMail($this->__getEmailRecipients($rcp_to),
                                                                $this->__getEmailRecipients($rcp_cc),
                                                                $this->__getEmailRecipients($rcp_bc),
                                                                $a_m_subject,
                                                                $a_m_message,
                                                                $a_attachment,
                                                                0);
                }
 
                if (in_array('system',$a_type))
                {
                        if (!$this->distributeMail($rcp_to,$rcp_cc,$rcp_bc,$a_m_subject,$a_m_message,$a_attachment,$sent_id,$a_type,'system', $a_use_placeholders))
                        {
                                return $lng->txt("mail_send_error");
                        }
                }
                // ACTIONS FOR TYPE SYSTEM AND NORMAL
                if (in_array('normal',$a_type))
                {
                        // TRY BOTH internal and email (depends on user settings)
                        if (!$this->distributeMail($rcp_to,$rcp_cc,$rcp_bc,$a_m_subject,$a_m_message,$a_attachment,$sent_id,$a_type,'normal', $a_use_placeholders))
                        {
                                return $lng->txt("mail_send_error");
                        }
                }
 
                // Temporary bugfix
                if (!$this->getSaveInSentbox())
                {
                        $this->deleteMails(array($sent_id));
                }
 
                return '';
        }
 
        function parseRcptOfMailingLists($rcpt = '', $maintain_lists = false)
        {
                if ($rcpt == '') 
                {
                        if(!$maintain_lists)
                        {
                                return $rcpt;
                        }
                        else
                        {
                                return array();
                        }
                }
//@todo check rcp pear validation
                $arrRcpt = $this->explodeRecipients(trim($rcpt));
                if (!is_array($arrRcpt) || empty($arrRcpt))
                {
                        if(!$maintain_lists)
                        {
                                return $rcpt;
                        }
                        else
                        {
                                return array();
                        }
                }
 
                $new_rcpt = array();
 
                foreach ($arrRcpt as $item)
                {
                        if (ilMail::_usePearMail())
                        {
                                if (substr($item->mailbox, 0, 7) == '#il_ml_')
                                {
                                        if ($this->mlists->mailingListExists($item->mailbox))
                                        {
                                                foreach ($this->mlists->getCurrentMailingList()->getAssignedEntries() as $entry)
                                                {
                                                        if(!$maintain_lists)
                                                        {
                                                                $new_rcpt[] = ($entry['login'] != '' ? $entry['login'] : $entry['email']);
                                                        }
                                                        else
                                                        {
                                                                $new_rcpt[$item->mailbox][] = ($entry['login'] != '' ? $entry['login'] : $entry['email']);
                                                        }
                                                }
                                        }
                                }
                                else
                                {
                                        $tmp_rcpt = '';
                                        if($item->host == self::ILIAS_HOST)
                                        {
                                                $tmp_rcpt = $item->mailbox;
                                        }
                                        else
                                        {
                                                $tmp_rcpt = $item->mailbox.'@'.$item->host;
                                        }
 
                                        if(!$maintain_lists)
                                        {
                                                $new_rcpt[] = $tmp_rcpt;
                                        }
                                        else
                                        {
                                                $new_rcpt[0][] = $tmp_rcpt;
                                        }
                                }
                        }
                        else
                        {
                                if (substr($item, 0, 7) == '#il_ml_')
                                {
                                        if ($this->mlists->mailingListExists($item))
                                        {
                                                foreach ($this->mlists->getCurrentMailingList()->getAssignedEntries() as $entry)
                                                {
                                                        if(!$maintain_lists)
                                                        {
                                                                $new_rcpt[] = ($entry['login'] != '' ? $entry['login'] : $entry['email']);
                                                        }
                                                        else
                                                        {
                                                                $new_rcpt[$item][] = ($entry['login'] != '' ? $entry['login'] : $entry['email']);
                                                        }
                                                }
                                        }
                                }
                                else
                                {
                                        if(!$maintain_lists)
                                        {
                                                $new_rcpt[] = $item;
                                        }
                                        else
                                        {
                                                $new_rcpt[0][] = $item;
                                        }
                                }
                        }
                }
 
                if(!$maintain_lists)
                {
                        return implode(',', $new_rcpt);
                }
                else
                {
                        return $new_rcpt;
                }
        }
 
        function saveInSentbox($a_attachment,$a_rcp_to,$a_rcp_cc,$a_rcp_bcc,$a_type,
                                                   $a_m_subject,$a_m_message)
        {
                include_once "Services/Mail/classes/class.ilMailbox.php";
 
                $mbox = new ilMailbox($this->user_id);
                $sent_id = $mbox->getSentFolder();
 
                return $this->sendInternalMail($sent_id,$this->user_id,$a_attachment,$a_rcp_to,$a_rcp_cc,
                                                                                $a_rcp_bcc,'read',$a_type,$a_as_email,$a_m_subject,$a_m_message,$this->user_id, 0);
        }
 
        public static function addFullname($a_email, $a_fullname)
        {
                include_once 'Services/Mail/classes/class.ilMimeMail.php';
                return ilMimeMail::_mimeEncode($a_fullname).' <'.$a_email.'>';
        }
 
        public function getMimeMailSender()
        {
                global $ilUser;
                
                include_once "Services/Mail/classes/class.ilMimeMail.php";
                
                if($this->user_id && $this->user_id != ANONYMOUS_USER_ID)
                {
                        $email = $ilUser->getEmail();
                        $fullname = $ilUser->getFullname();
                        if($ilUser->getId() != $this->user_id)
                        {
                                $user = self::getCachedUserInstance($this->user_id);
                                $email = $user->getEmail();
                                $fullname = $user->getFullname();
                        }
                        
                        $sender = self::addFullname($email, $fullname);
                }
                else
                {
                        $sender = self::getIliasMailerAddress();
                }
 
                return $sender;
        }
        
        public static function getIliasMailerAddress()
        {
                global $ilSetting;
                
                include_once 'Services/Mail/classes/class.ilMimeMail.php';
                
                $no_reply_adress = trim($ilSetting->get('mail_external_sender_noreply'));
                if(strlen($no_reply_adress))
                {
                        if(strpos($no_reply_adress, '@') === false)
                                $no_reply_adress = 'noreply@'.$no_reply_adress;
                        
                        if(!ilUtil::is_email($no_reply_adress))
                        {
                                $no_reply_adress = 'noreply@'.$_SERVER['SERVER_NAME'];
                        }
 
                        $sender = ilMimeMail::_mimeEncode(self::_getIliasMailerName()).
                                          ' <'.$no_reply_adress.'>';
                }
                else
                {
                        $sender = ilMimeMail::_mimeEncode(self::_getIliasMailerName()).
                                          ' <noreply@'.$_SERVER['SERVER_NAME'].'>';
                }
                
                return $sender;
        }
 
        function sendMimeMail($a_rcp_to,$a_rcp_cc,$a_rcp_bcc,$a_m_subject,$a_m_message,$a_attachments,$a_no_soap = false)
        {
                include_once "Services/Mail/classes/class.ilMimeMail.php";
 
                #var_dump("<pre>",$a_rcp_to,$a_rcp_cc,$a_rcp_bcc,$a_m_subject,$a_m_message,$a_attachments,"<pre>");
 
                #$inst_name = $this->ilias->getSetting("inst_name") ? $this->ilias->getSetting("inst_name") : "ILIAS 4";
                #$a_m_subject = "[".$inst_name."] ".$a_m_subject;
 
                $a_m_subject = self::getSubjectPrefix().' '.$a_m_subject;
 
                $sender = $this->getMimeMailSender();
 
                // #10854
                if($this->isSOAPEnabled() && !$a_no_soap)
                {
                        // Send per soap
                        include_once 'Services/WebServices/SOAP/classes/class.ilSoapClient.php';
 
                        $soap_client = new ilSoapClient();
                        $soap_client->setResponseTimeout(1);
                        $soap_client->enableWSDL(true);
                        $soap_client->init();
 
                        $attachments = array();
                        $a_attachments = $a_attachments ? $a_attachments : array();
                        foreach($a_attachments as $attachment)
                        {
                                $attachments[] = $this->mfile->getAbsolutePath($attachment);
                        }
                        // mjansen: switched separator from "," to "#:#" because of mantis bug #6039
                        $attachments = implode('#:#',$attachments);
                        // mjansen: use "#:#" as leading delimiter
                        if(strlen($attachments))  
                                $attachments = "#:#".$attachments;
 
                        $soap_client->call('sendMail',array(session_id().'::'.$_COOKIE['ilClientId'],   // session id
                                                                                                $a_rcp_to,
                                                                                                $a_rcp_cc,
                                                                                                $a_rcp_bcc,
                                                                                                $sender,
                                                                                                $a_m_subject,
                                                                                                $a_m_message,
                                                                                                $attachments));
 
                        return true;
                }
                else
                {
                        // send direct
                        include_once "Services/Mail/classes/class.ilMimeMail.php";
 
                        $mmail = new ilMimeMail();
                        $mmail->autoCheck(false);
                        $mmail->From($sender);
                        $mmail->To($a_rcp_to);
                        // Add installation name to subject
                        $mmail->Subject($a_m_subject);
                        $mmail->Body($a_m_message);
 
                        if ($a_rcp_cc)
                        {
                                $mmail->Cc($a_rcp_cc);
                        }
 
                        if ($a_rcp_bcc)
                        {
                                $mmail->Bcc($a_rcp_bcc);
                        }
 
                        if (is_array($a_attachments))
                        {
                                foreach ($a_attachments as $attachment)
                                {
                                        $mmail->Attach($this->mfile->getAbsolutePath($attachment), '', 'inline', $attachment);
                                }
                        }
 
                        $mmail->Send();
                }
        }
        function getEmailOfSender()
        {
                $umail = self::getCachedUserInstance($this->user_id);
                $sender = $umail->getEmail();
 
                if (ilUtil::is_email($sender))
                {
                        return $sender;
                }
                else
                {
                        return '';
                }
        }
 
        function saveAttachments($a_attachments)
        {
                global $ilDB;
 
                $ilDB->update($this->table_mail_saved,
                        array
                        (
                                'attachments' => array('clob', serialize($a_attachments))
                        ),
                        array
                        (
                                'user_id' => array('integer', $this->user_id)
                        )
                );
                
                return true;
        }
 
        function getAttachments()
        {
                return $this->mail_data["attachments"] ? $this->mail_data["attachments"] : array();
        }
 
        function explodeRecipients($a_recipients, $use_pear = true)
        {
                $a_recipients = trim($a_recipients);
 
                // WHITESPACE IS NOT ALLOWED AS SEPERATOR
                #$a_recipients = preg_replace("/ /",",",$a_recipients);
                $a_recipients = preg_replace("/;/",",",$a_recipients);
                
                if (ilMail::_usePearMail() && $use_pear == true)
                {
                        if (strlen(trim($a_recipients)) > 0)
                        {
                                require_once './Services/PEAR/lib/Mail/RFC822.php';
                                $parser = new Mail_RFC822();
                                return $parser->parseAddressList($a_recipients, self::ILIAS_HOST, false, true);
                        } else {
                                return array();
                        }
                }
                else
                {
                        foreach(explode(',',$a_recipients) as $tmp_rec)
                        {
                                if($tmp_rec)
                                {
                                        $rcps[] = trim($tmp_rec);
                                }
                        }
                        return is_array($rcps) ? $rcps : array();
                }
        }
 
        function __getCountRecipient($rcp,$a_only_email = true)
        {
                $counter = 0;
 
                $this->validatePear($rcp);
                if (ilMail::_usePearMail() && $this->getUsePear())
                {
                        $tmp_rcp = $this->explodeRecipients($rcp);
                        if (! is_a($tmp_rcp, 'PEAR_Error'))
                        {
                                foreach ($tmp_rcp as $to)
                                {
                                        if ($a_only_email)
                                        {
                                                // Fixed mantis bug #5875
                                                if(ilObjUser::_lookupId($to->mailbox.'@'.$to->host))
                                                {
                                                        continue;
                                                }
 
                                                // Addresses which aren't on the self::ILIAS_HOST host, and
                                                // which have a mailbox which does not start with '#',
                                                // are external e-mail addresses
                                                if ($to->host != 'ilias' && substr($to->mailbox,0,1) != '#' && substr($to->mailbox,0,2) != '"#')
                                                {
                                                        ++$counter;
                                                }
                                        }
                                        else
                                        {
                                                ++$counter;
                                        }
                                }
                        }
                }
                else
                {
                        foreach ($this->explodeRecipients($rcp,$this->getUsePear()) as $to)
                        {
                                if ($a_only_email)
                                {
                                        $to = $this->__substituteRecipients($to,"resubstitute");
                                        if (strpos($to,'@'))
                                        {                                                       
                                                // Fixed mantis bug #5875
                                                if(ilObjUser::_lookupId($to))
                                                {
                                                        continue;
                                                }
 
                                                ++$counter;
                                        }
                                }
                                else
                                {
                                        ++$counter;
                                }
                        }
                }
                return $counter;
        }
 
 
        function __getCountRecipients($a_to,$a_cc,$a_bcc,$a_only_email = true)
        {
                return $this->__getCountRecipient($a_to,$a_only_email)
                        + $this->__getCountRecipient($a_cc,$a_only_email)
                        + $this->__getCountRecipient($a_bcc,$a_only_email);
        }
 
        function __getEmailRecipients($a_rcp)
        {
                if (ilMail::_usePearMail())
                {
                        $rcp = array();
                        $tmp_rcp = $this->explodeRecipients($a_rcp);
                        if (! is_a($tmp_rcp, 'PEAR_Error'))
                        {
                                foreach ($tmp_rcp as $to)
                                {
                                        if(substr($to->mailbox,0,1) != '#' && substr($to->mailbox,0,2) != '"#' && $to->host != 'ilias')
                                        {
                                                // Fixed mantis bug #5875
                                                if(ilObjUser::_lookupId($to->mailbox.'@'.$to->host))
                                                {
                                                        continue;
                                                }
 
                                                $rcp[] = $to->mailbox.'@'.$to->host;
                                        }
                                }
                        }
                        return implode(',',$rcp);
                }
                else
                {
                        foreach ($this->explodeRecipients($a_rcp) as $to)
                        {
                                $to = $this->__substituteRecipients($to,"resubstitute");
                                if(strpos($to,'@'))
                                {
                                        // Fixed mantis bug #5875
                                        if(ilObjUser::_lookupId($to))
                                        {
                                                continue;
                                        }
 
                                        $rcp[] = $to;
                                }
                        }
                        return implode(',',$rcp ? $rcp : array());
                }
        }
 
        function __prependMessage($a_m_message,$rcp_to,$rcp_cc)
        {
                $inst_name = $this->ilias->getSetting("inst_name") ? $this->ilias->getSetting("inst_name") : "ILIAS 3";
 
                $message = $inst_name." To:".$rcp_to."\n";
 
                if ($rcp_cc)
                {
                        $message .= "Cc: ".$rcp_cc;
                }
 
                $message .= "\n\n";
                $message .= $a_m_message;
 
                return $message;
        }
 
        function __substituteRecipients($a_rcp,$direction)
        {
                $new_name = array();
 
                $tmp_names = $this->explodeRecipients($a_rcp);
 
 
                foreach($tmp_names as $name)
                {
                        if(strpos($name,"#") === 0)
                        {
                                $new_name[] = $name;
                                continue;
                        }
                        switch($direction)
                        {
                                case "substitute":
                                        if(strpos($name,"@") and ilObjUser::_loginExists($name))
                                        {
                                                $new_name[] = preg_replace("/@/","�#�",$name);
                                        }
                                        else
                                        {
                                                $new_name[] = $name;
                                        }
                                        break;
 
                                case "resubstitute":
                                        if(stristr($name,"�#�"))
                                        {
                                                $new_name[] = preg_replace("/�#�/","@",$name);
                                        }
                                        else
                                        {
                                                $new_name[] = $name;
                                        }
                                        break;
                        }
                }
                return implode(",",$new_name);
        }
 
        public static function _getUserInternalMailboxAddress($usr_id, $login=null, $firstname=null, $lastname=null) 
        {
                if (ilMail::_usePearMail())
                {
                        if ($login == null)
                        {
                                require_once './Services/User/classes/class.ilObjUser.php';
                                $usr_obj = self::getCachedUserInstance($usr_id);
                                $login = $usr_obj->getLogin();
                                $firstname = $usr_obj->getFirstname();
                                $lastname = $usr_obj->getLastname();
                        }
                        // The following line of code creates a properly formatted mailbox
                        // address. Unfortunately, it does not work, because ILIAS removes
                        // everything between '<' '>' characters
                        // Therefore, we just return the login - sic.
                        // FIXME - Make this work in a future release
                        /*
                        return preg_replace('/[()<>@,;:\\".\[\]]/','',$firstname.' '.$lastname).' <'.$login.'>';
                        */
                        return $login.'hhho';
                }
                else
                {
                        return $login;
                }
        }
        public static function _usePearMail()
        {
                global $ilSetting;
 
                return $ilSetting->get('pear_mail_enable', 0);
        }
 
        public static function _getAutoGeneratedMessageString($lang = null)
        {
                global $ilSetting;
 
                if(!$lang)
                {
                        include_once('./Services/Language/classes/class.ilLanguageFactory.php');
                        $lang = ilLanguageFactory::_getLanguage();
                }
                $http_path = ilUtil::_getHttpPath();
 
                $lang->loadLanguageModule('mail');
                return sprintf($lang->txt('mail_auto_generated_info'),
                        $ilSetting->get('inst_name','ILIAS 5'),
                        $http_path)."\n\n";
        }
 
        public static function _getIliasMailerName()
        {
                global $ilSetting;
 
                if(strlen($ilSetting->get('mail_system_sender_name')))
                {
                        return $ilSetting->get('mail_system_sender_name');
                }
                else if(strlen($ilSetting->get('short_inst_name')))
                {
                        return $ilSetting->get('short_inst_name');
                }
 
                return 'ILIAS';
        }
 
        public function appendInstallationSignature($a_flag = null)
        {
                if(null === $a_flag) {
                        return $this->appendInstallationSignature;
                }
 
                $this->appendInstallationSignature = $a_flag;
        
                return $this;
        }
 
        public static function _getInstallationSignature()
        {
                global $ilClientIniFile;
 
                $signature = "\n\n* * * * *\n";
        
                $signature .= $ilClientIniFile->readVariable('client', 'name')."\n";
                if(strlen($desc = $ilClientIniFile->readVariable('client', 'description')))
                {
                        $signature .= $desc."\n";
                }
                
                $signature .= ilUtil::_getHttpPath();
 
                $clientdirs = glob(ILIAS_WEB_DIR."/*", GLOB_ONLYDIR);
                if(is_array($clientdirs) && count($clientdirs) > 1)
                {
                        // #18051
                        $signature .= '/login.php?client_id='.CLIENT_ID;
                }
                
                $signature .= "\n\n";
 
                return $signature;
        }
 
        public static function getSubjectPrefix()
        {
                global $ilSetting;
                static $prefix = null;
 
                return $prefix == null ? $ilSetting->get('mail_subject_prefix','') : $prefix;
        }
 
        public static function getSalutation($a_usr_id,$a_language = null)
        {
                global $lng;
 
                $lang = $a_language ? $a_language : $lng;
 
                $lang->loadLanguageModule('mail');
                $gender = ilObjUser::_lookupGender($a_usr_id);
                $gender = $gender ? $gender : 'n';
                $name = ilObjUser::_lookupName($a_usr_id);
 
                if(!strlen($name['firstname']))
                {
                        return $lang->txt('mail_salutation_anonymous').',';
                }
 
                return $lang->txt('mail_salutation_'.$gender).' '.
                        ($name['title'] ? $name['title'].' ' : '').
                        ($name['firstname'] ? $name['firstname'].' ' : '').
                        $name['lastname'].',';
        }
 
        private function setUsePear($bool)
        {
                $this->use_pear = $bool;
        }
        
        private function getUsePear()
        {
                return $this->use_pear;
        }
 
        // Force fallback for sending mails via ILIAS, if internal Pear-Validation returns PEAR_Error
        private function validatePear($a_recipients)
        {
                if(ilMail::_usePearMail())
                {
                        $this->setUsePear(true);
                        $tmp_names = $this->explodeRecipients($a_recipients, true);
                        if(is_a($tmp_names, 'PEAR_Error'))
                        {
                                $this->setUsePear(false);
                        }
                }
                else
                {
                        $this->setUsePear(false);
                }
        }
 
        protected static function getCachedUserInstance($a_usr_id)
        {
                if(isset(self::$userInstances[$a_usr_id]))
                {
                        return self::$userInstances[$a_usr_id];
                }
 
                self::$userInstances[$a_usr_id] = new ilObjUser($a_usr_id);
                return self::$userInstances[$a_usr_id];
        }
} // END class.ilMail
?>