<?php
/*********************************************************************
    class.thread.php

    Ticket thread
    XXX: Please DO NOT add any ticket related logic! use ticket class.

    Peter Rotich <peter@osticket.com>
    Copyright (c)  2006-2013 osTicket
    http://www.osticket.com

    Released under the GNU General Public License WITHOUT ANY WARRANTY.
    See LICENSE.TXT for details.

    vim: expandtab sw=4 ts=4 sts=4:
**********************************************************************/
include_once(INCLUDE_DIR.'class.ticket.php');

//Ticket thread.
class Thread {

    var $id; // same as ticket ID.
    var $ticket;

    function Thread($ticket) {

        $this->ticket = $ticket;

        $this->id = 0;

        $this->load();
    }

    function load() {

        if(!$this->getTicketId())
            return null;

        $sql='SELECT ticket.ticket_id as id '
            .' ,count(DISTINCT attach.attach_id) as attachments '
            .' ,count(DISTINCT message.id) as messages '
            .' ,count(DISTINCT response.id) as responses '
            .' ,count(DISTINCT note.id) as notes '
            .' FROM '.TICKET_TABLE.' ticket '
            .' LEFT JOIN '.TICKET_ATTACHMENT_TABLE.' attach ON ('
                .'ticket.ticket_id=attach.ticket_id) '
            .' LEFT JOIN '.TICKET_THREAD_TABLE.' message ON ('
                ."ticket.ticket_id=message.ticket_id AND message.thread_type = 'M') "
            .' LEFT JOIN '.TICKET_THREAD_TABLE.' response ON ('
                ."ticket.ticket_id=response.ticket_id AND response.thread_type = 'R') "
            .' LEFT JOIN '.TICKET_THREAD_TABLE.' note ON ( '
                ."ticket.ticket_id=note.ticket_id AND note.thread_type = 'N') "
            .' WHERE ticket.ticket_id='.db_input($this->getTicketId())
            .' GROUP BY ticket.ticket_id';

        if(!($res=db_query($sql)) || !db_num_rows($res))
            return false;

        $this->ht = db_fetch_array($res);

        $this->id = $this->ht['id'];

        return true;
    }

    function getId() {
        return $this->id;
    }

    function getTicketId() {
        return $this->getTicket()?$this->getTicket()->getId():0;
    }

    function getTicket() {
        return $this->ticket;
    }

    function getNumAttachments() {
        return $this->ht['attachments'];
    }

    function getNumMessages() {
        return $this->ht['messages'];
    }

    function getNumResponses() {
        return $this->ht['responses'];
    }

    function getNumNotes() {
        return $this->ht['notes'];
    }

    function getCount() {
        return $this->getNumMessages() + $this->getNumResponses();
    }

    function getMessages() {
        return $this->getEntries('M');
    }

    function getResponses() {
        return $this->getEntries('R');
    }

    function getNotes() {
        return $this->getEntries('N');
    }

    function getEntries($type, $order='ASC') {

        if(!$order || !in_array($order, array('DESC','ASC')))
            $order='ASC';

        $sql='SELECT thread.* '
            .' ,count(DISTINCT attach.attach_id) as attachments '
            .' FROM '.TICKET_THREAD_TABLE.' thread '
            .' LEFT JOIN '.TICKET_ATTACHMENT_TABLE.' attach
                ON (thread.ticket_id=attach.ticket_id
                        AND thread.id=attach.ref_id
                        AND thread.thread_type=attach.ref_type) '
            .' WHERE  thread.ticket_id='.db_input($this->getTicketId());

        if($type && is_array($type))
            $sql.=' AND thread.thread_type IN('.implode(',', db_input($type)).')';
        elseif($type)
            $sql.=' AND thread.thread_type='.db_input($type);

        $sql.=' GROUP BY thread.id '
             .' ORDER BY thread.created '.$order;

        $entries = array();
        if(($res=db_query($sql)) && db_num_rows($res))
            while($rec=db_fetch_array($res))
                $entries[] = $rec;

        return $entries;
    }

    function getEntry($id) {
        return ThreadEntry::lookup($id, $this->getTicketId());
    }

    function addNote($vars, &$errors) {

        //Add ticket Id.
        $vars['ticketId'] = $this->getTicketId();

        // DELME: When HTML / rich-text is supported
        $vars['title'] = Format::htmlchars($vars['title']);
        $vars['body'] = Format::htmlchars($vars['body']);

        return Note::create($vars, $errors);
    }

    function addMessage($vars, &$errors) {

        $vars['ticketId'] = $this->getTicketId();
        $vars['staffId'] = 0;

        // DELME: When HTML / rich-text is supported
        $vars['title'] = Format::htmlchars($vars['title']);
        $vars['body'] = Format::htmlchars($vars['body']);

        return Message::create($vars, $errors);
    }

    function addResponse($vars, &$errors) {

        $vars['ticketId'] = $this->getTicketId();

        // DELME: When HTML / rich-text is supported
        $vars['title'] = Format::htmlchars($vars['title']);
        $vars['body'] = Format::htmlchars($vars['body']);

        return Response::create($vars, $errors);
    }

    function deleteAttachments() {

        $deleted=0;
        // Clear reference table
        $res=db_query('DELETE FROM '.TICKET_ATTACHMENT_TABLE.' WHERE ticket_id='.db_input($this->getTicketId()));
        if ($res && db_affected_rows())
            $deleted = AttachmentFile::deleteOrphans();

        return $deleted;
    }

    function delete() {

        $res=db_query('DELETE FROM '.TICKET_THREAD_TABLE.' WHERE ticket_id='.db_input($this->getTicketId()));
        if(!$res || !db_affected_rows())
            return false;

        $this->deleteAttachments();

        return true;
    }

    /* static */
    function lookup($ticket) {

        return ($ticket
                && is_object($ticket)
                && ($thread = new Thread($ticket))
                && $thread->getId()
                )?$thread:null;
    }
}


Class ThreadEntry {

    var $id;
    var $ht;

    var $staff;
    var $ticket;

    var $attachments;


    function ThreadEntry($id, $type='', $ticketId=0) {
        $this->load($id, $type, $ticketId);
    }

    function load($id=0, $type='', $ticketId=0) {

        if(!$id && !($id=$this->getId()))
            return false;

        $sql='SELECT thread.*, info.* '
            .' ,count(DISTINCT attach.attach_id) as attachments '
            .' FROM '.TICKET_THREAD_TABLE.' thread '
            .' LEFT JOIN '.TICKET_EMAIL_INFO_TABLE.' info
                ON (thread.id=info.message_id) '
            .' LEFT JOIN '.TICKET_ATTACHMENT_TABLE.' attach
                ON (thread.ticket_id=attach.ticket_id
                        AND thread.id=attach.ref_id
                        AND thread.thread_type=attach.ref_type) '
            .' WHERE  thread.id='.db_input($id);

        if($type)
            $sql.=' AND thread.thread_type='.db_input($type);

        if($ticketId)
            $sql.=' AND thread.ticket_id='.db_input($ticketId);

        $sql.=' GROUP BY thread.id ';

        if(!($res=db_query($sql)) || !db_num_rows($res))
            return false;

        $this->ht = db_fetch_array($res);
        $this->id = $this->ht['id'];

        $this->staff = $this->ticket = null;
        $this->attachments = array();

        return true;
    }

    function reload() {
        return $this->load();
    }

    function getId() {
        return $this->id;
    }

    function getPid() {
        return $this->ht['pid'];
    }

    function getType() {
        return $this->ht['thread_type'];
    }

    function getSource() {
        return $this->ht['source'];
    }

    function getPoster() {
        return $this->ht['poster'];
    }

    function getTitle() {
        return $this->ht['title'];
    }

    function getBody() {
        return $this->ht['body'];
    }

    function getCreateDate() {
        return $this->ht['created'];
    }

    function getUpdateDate() {
        return $this->ht['updated'];
    }

    function getNumAttachments() {
        return $this->ht['attachments'];
    }

    function getTicketId() {
        return $this->ht['ticket_id'];
    }

    function getTicket() {

        if(!$this->ticket && $this->getTicketId())
            $this->ticket = Ticket::lookup($this->getTicketId());

        return $this->ticket;
    }

    function getStaffId() {
        return $this->ht['staff_id'];
    }

    function getStaff() {

        if(!$this->staff && $this->getStaffId())
            $this->staff = Staff::lookup($this->getStaffId());

        return $this->staff;
    }

    function getEmailHeader() {
        return $this->ht['headers'];
    }

    function isAutoResponse() {
        return $this->getEmailHeader()?TicketFilter::isAutoResponse($this->getEmailHeader()):false;
    }

    //Web uploads - caller is expected to format, validate and set any errors.
    function uploadFiles($files) {

        if(!$files || !is_array($files))
            return false;

        $uploaded=array();
        foreach($files as $file) {
            if($file['error'] && $file['error']==UPLOAD_ERR_NO_FILE)
                continue;

            if(!$file['error']
                    && ($id=AttachmentFile::upload($file))
                    && $this->saveAttachment($id))
                $uploaded[]=$id;
            else {
                if(!$file['error'])
                    $error = 'Unable to upload file - '.$file['name'];
                elseif(is_numeric($file['error']))
                    $error ='Error #'.$file['error']; //TODO: Transplate to string.
                else
                    $error = $file['error'];
                /*
                 Log the error as an internal note.
                 XXX: We're doing it here because it will eventually become a thread post comment (hint: comments coming!)
                 XXX: logNote must watch for possible loops
               */
                $this->getTicket()->logNote('File Upload Error', $error, 'SYSTEM', false);
            }

        }

        return $uploaded;
    }

    function importAttachments($attachments) {

        if(!$attachments || !is_array($attachments))
            return null;

        $files = array();
        foreach($attachments as  $attachment)
            if(($id=$this->importAttachment($attachment)))
                $files[] = $id;

        return $files;
    }

    /* Emailed & API attachments handler */
    function importAttachment($attachment) {

        if(!$attachment || !is_array($attachment))
            return null;

        $id=0;
        if (!$attachment['error'] && ($id=$this->saveAttachment($attachment)))
            $files[] = $id;
        else {
            $error = $attachment['error'];

            if(!$error)
                $error = 'Unable to import attachment - '.$attachment['name'];

            $this->getTicket()->logNote('File Import Error', $error, 'SYSTEM', false);
        }

        return $id;
    }

   /*
    Save attachment to the DB.
    @file is a mixed var - can be ID or file hashtable.
    */
    function saveAttachment($file) {

        if(!($fileId=is_numeric($file)?$file:AttachmentFile::save($file)))
            return 0;

        $sql ='INSERT INTO '.TICKET_ATTACHMENT_TABLE.' SET created=NOW() '
             .' ,file_id='.db_input($fileId)
             .' ,ticket_id='.db_input($this->getTicketId())
             .' ,ref_id='.db_input($this->getId())
             .' ,ref_type='.db_input($this->getType());

        return (db_query($sql) && ($id=db_insert_id()))?$id:0;
    }

    function saveAttachments($files) {
        $ids=array();
        foreach($files as $file)
           if(($id=$this->saveAttachment($file)))
               $ids[] = $id;

        return $ids;
    }

    function getAttachments() {

        if($this->attachments)
            return $this->attachments;

        //XXX: inner join the file table instead?
        $sql='SELECT a.attach_id, f.id as file_id, f.size, f.hash as file_hash, f.name '
            .' FROM '.FILE_TABLE.' f '
            .' INNER JOIN '.TICKET_ATTACHMENT_TABLE.' a ON(f.id=a.file_id) '
            .' WHERE a.ticket_id='.db_input($this->getTicketId())
            .' AND a.ref_id='.db_input($this->getId())
            .' AND a.ref_type='.db_input($this->getType());

        $this->attachments = array();
        if(($res=db_query($sql)) && db_num_rows($res)) {
            while($rec=db_fetch_array($res))
                $this->attachments[] = $rec;
        }

        return $this->attachments;
    }

    function getAttachmentsLinks($file='attachment.php', $target='', $separator=' ') {

        $str='';
        foreach($this->getAttachments() as $attachment ) {
            /* The hash can be changed  but must match validation in @file */
            $hash=md5($attachment['file_id'].session_id().$attachment['file_hash']);
            $size = '';
            if($attachment['size'])
                $size=sprintf('<em>(%s)</em>', Format::file_size($attachment['size']));

            $str.=sprintf('<a class="Icon file" href="%s?id=%d&h=%s" target="%s">%s</a>%s&nbsp;%s',
                    $file, $attachment['attach_id'], $hash, $target, Format::htmlchars($attachment['name']), $size, $separator);
        }

        return $str;
    }


    /* Returns file names with id as key */
    function getFiles() {

        $files = array();
        foreach($this->getAttachments() as $attachment)
            $files[$attachment['file_id']] = $attachment['name'];

        return $files;
    }


    /* save email info
     * TODO: Refactor it to include outgoing emails on responses.
     */

    function saveEmailInfo($vars) {

        if(!$vars || !$vars['mid'])
            return 0;

        $sql='INSERT INTO '.TICKET_EMAIL_INFO_TABLE
            .' SET message_id='.db_input($this->getId()) //TODO: change it to thread_id
            .', email_mid='.db_input($vars['mid']) //TODO: change it to mid.
            .', headers='.db_input($vars['header']);

        return db_query($sql)?db_insert_id():0;
    }


    /* variables */

    function asVar() {
        return $this->getBody();
    }

    function getVar($tag) {
        global $cfg;

        if($tag && is_callable(array($this, 'get'.ucfirst($tag))))
            return call_user_func(array($this, 'get'.ucfirst($tag)));

        switch(strtolower($tag)) {
            case 'create_date':
                return Format::date(
                        $cfg->getDateTimeFormat(),
                        Misc::db2gmtime($this->getCreateDate()),
                        $cfg->getTZOffset(),
                        $cfg->observeDaylightSaving());
                break;
            case 'update_date':
                return Format::date(
                        $cfg->getDateTimeFormat(),
                        Misc::db2gmtime($this->getUpdateDate()),
                        $cfg->getTZOffset(),
                        $cfg->observeDaylightSaving());
                break;
        }

        return false;
    }

    /* static calls */

    function lookup($id, $tid=0, $type='') {
        return ($id
                && is_numeric($id)
                && ($e = new ThreadEntry($id, $type, $tid))
                && $e->getId()==$id
                )?$e:null;
    }

    //new entry ... we're trusting the caller to check validity of the data.
    function create($vars) {

        //Must have...
        if(!$vars['ticketId'] || !$vars['type'] || !in_array($vars['type'], array('M','R','N')))
            return false;

        $sql=' INSERT INTO '.TICKET_THREAD_TABLE.' SET created=NOW() '
            .' ,thread_type='.db_input($vars['type'])
            .' ,ticket_id='.db_input($vars['ticketId'])
            .' ,title='.db_input(Format::sanitize($vars['title'], true))
            .' ,body='.db_input(Format::sanitize($vars['body'], true))
            .' ,staff_id='.db_input($vars['staffId'])
            .' ,poster='.db_input($vars['poster'])
            .' ,source='.db_input($vars['source']);

        if(isset($vars['pid']))
            $sql.=' ,pid='.db_input($vars['pid']);

        if($vars['ip_address'])
            $sql.=' ,ip_address='.db_input($vars['ip_address']);

        //echo $sql;
        if(!db_query($sql) || !($entry=self::lookup(db_insert_id(), $vars['ticketId'])))
            return false;

        /************* ATTACHMENTS *****************/

        //Upload/save attachments IF ANY
        if($vars['files']) //expects well formatted and VALIDATED files array.
            $entry->uploadFiles($vars['files']);

        //Emailed or API attachments
        if($vars['attachments'])
            $entry->importAttachments($vars['attachments']);

        //Canned attachments...
        if($vars['cannedattachments'] && is_array($vars['cannedattachments']))
            $entry->saveAttachments($vars['cannedattachments']);

        return $entry;
    }

    function add($vars) {
        return ($entry=self::create($vars))?$entry->getId():0;
    }
}

/* Message - Ticket thread entry of type message */
class Message extends ThreadEntry {

    function Message($id, $ticketId=0) {
        parent::ThreadEntry($id, 'M', $ticketId);
    }

    function getSubject() {
        return $this->getTitle();
    }

    function create($vars, &$errors) {
        return self::lookup(self::add($vars, $errors));
    }

    function add($vars, &$errors) {

        if(!$vars || !is_array($vars) || !$vars['ticketId'])
            $errors['err'] = 'Missing or invalid data';
        elseif(!$vars['message'])
            $errors['message'] = 'Message required';

        if($errors) return false;

        $vars['type'] = 'M';
        $vars['body'] = $vars['message'];

        return ThreadEntry::add($vars);
    }

    function lookup($id, $tid=0, $type='M') {

        return ($id
                && is_numeric($id)
                && ($m = new Message($id, $tid))
                && $m->getId()==$id
                )?$m:null;
    }
}

/* Response - Ticket thread entry of type response */
class Response extends ThreadEntry {

    function Response($id, $ticketId=0) {
        parent::ThreadEntry($id, 'R', $ticketId);
    }

    function getSubject() {
        return $this->getTitle();
    }

    function getRespondent() {
        return $this->getStaff();
    }

    function create($vars, &$errors) {
        return self::lookup(self::add($vars, $errors));
    }

    function add($vars, &$errors) {

        if(!$vars || !is_array($vars) || !$vars['ticketId'])
            $errors['err'] = 'Missing or invalid data';
        elseif(!$vars['response'])
            $errors['response'] = 'Response required';

        if($errors) return false;

        $vars['type'] = 'R';
        $vars['body'] = $vars['response'];
        if(!$vars['pid'] && $vars['msgId'])
            $vars['pid'] = $vars['msgId'];

        return ThreadEntry::add($vars);
    }


    function lookup($id, $tid=0, $type='R') {

        return ($id
                && is_numeric($id)
                && ($r = new Response($id, $tid))
                && $r->getId()==$id
                )?$r:null;
    }
}

/* Note - Ticket thread entry of type note (Internal Note) */
class Note extends ThreadEntry {

    function Note($id, $ticketId=0) {
        parent::ThreadEntry($id, 'N', $ticketId);
    }

    function getMessage() {
        return $this->getBody();
    }

    /* static */
    function create($vars, &$errors) {
        return self::lookup(self::add($vars, $errors));
    }

    function add($vars, &$errors) {

        //Check required params.
        if(!$vars || !is_array($vars) || !$vars['ticketId'])
            $errors['err'] = 'Missing or invalid data';
        elseif(!$vars['note'])
            $errors['note'] = 'Note required';

        if($errors) return false;

        //TODO: use array_intersect_key  when we move to php 5 to extract just what we need.
        $vars['type'] = 'N';
        $vars['body'] = $vars['note'];

        return ThreadEntry::add($vars);
    }

    function lookup($id, $tid=0, $type='N') {

        return ($id
                && is_numeric($id)
                && ($n = new Note($id, $tid))
                && $n->getId()==$id
                )?$n:null;
    }
}
?>