AbiCollab.h

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/*
 * AbiCollab - Code to enable the modification of remote documents.
 * Copyright (C) 2005 by Martin Sevior
 * Copyright (C) 2006,2007 by Marc Maurer <uwog@uwog.net>
 * Copyright (C) 2007 by One Laptop Per Child
 * Copyright (C) 2008 by AbiSource Corporation B.V.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 */

#ifndef ABI_COLLAB_H
#define ABI_COLLAB_H

#include <map>
#include <vector>
#include "ev_EditBits.h"
#include "ev_MouseListener.h"
#include "ut_types.h"
#include "pt_Types.h"
#include "px_ChangeRecord.h"
#include "stdio.h"
#include "xav_Listener.h"
#include "pl_Listener.h"
#include "ut_string_class.h"
#include "ut_uuid.h"

#include <account/xp/Buddy.h>
#include <packet/xp/AbiCollab_Packet.h>
#include <session/xp/AbiCollab_Import.h>
#include <session/xp/AbiCollab_Export.h>

class FL_DocLayout;
class PD_Document;
class PX_ChangeRecord;
class CommandLine;
class Buddy;
class AccountHandler;

enum SessionTakeoverState
{
    STS_NONE,
    STS_SENT_TAKEOVER_REQUEST,
    STS_SENT_TAKEOVER_ACK,
    STS_SENT_SESSION_RECONNECT_REQUEST
};  

class ChangeAdjust
{
friend class AbiCollab_ImportRuleSet;
    
public:
    ChangeAdjust(const AbstractChangeRecordSessionPacket& packet, PT_DocPosition iOrigDocPos, const UT_UTF8String& sRemoteDocUUID);
    ~ChangeAdjust();
    
    PT_DocPosition              getLocalPos() const { return m_iLocalPos; }
    void                        setLocalPos(PT_DocPosition iLocalPos) { m_iLocalPos = iLocalPos; }
    UT_sint32                   getLocalLength() const { return m_pPacket->getLength(); }
    UT_sint32                   getLocalAdjust() const { return m_pPacket->getAdjust(); }
    UT_sint32                   getLocalRev() const { return m_pPacket->getRev(); }
    
    PT_DocPosition              getRemoteDocPos() const { return m_iRemoteDocPos; }
    const UT_UTF8String&        getRemoteDocUUID() const { return m_sRemoteDocUUID; }
    
private:
    // locally generated data (possibly in response to remotely generated data)
    const AbstractChangeRecordSessionPacket*    m_pPacket;
    PT_DocPosition                              m_iLocalPos;
    
    // remotely generated data
    PT_DocPosition                              m_iRemoteDocPos;
    UT_UTF8String                               m_sRemoteDocUUID;
};

class AbiCollab;
class SessionRecorderInterface
{
public:
    SessionRecorderInterface( AbiCollab* Session ) : m_pAbiCollab(Session) {}
    virtual ~SessionRecorderInterface() {}
    virtual void storeOutgoing(const Packet* pPacket ) = 0;
    virtual void storeOutgoing(const Packet* pPacket, BuddyPtr toBuddy) = 0;
    virtual void storeIncoming(const Packet* pPacket, BuddyPtr fromBuddy) = 0;
protected:
    AbiCollab*      m_pAbiCollab;
};

class AbiCollab : public EV_MouseListener
{
    friend class ABI_Collab_Export;

public:
    // master constructor
    AbiCollab(PD_Document* pDoc,
                    const UT_UTF8String& sSessionId, 
                    AccountHandler* pAclAccount,
                    bool bLocallyOwned);

    // slave constructor
    AbiCollab(const UT_UTF8String& sSessionId, 
                    PD_Document* pDoc, 
                    const UT_UTF8String& docUUID,
                    UT_sint32 iRev,
                    BuddyPtr pControler,
                    AccountHandler* pAclAccount,
                    bool m_bLocallyOwned);

    virtual ~AbiCollab();

    // collaborator management
    void                                addCollaborator(BuddyPtr pCollaborator);
    void                                removeCollaborator(BuddyPtr pCollaborator);
    const std::map<BuddyPtr, std::string>&      getCollaborators() const
        { return m_vCollaborators; }
    bool                                isController(BuddyPtr pCollaborator) const
        { return m_pController == pCollaborator; }
    bool                                isLocallyOwned() const
        { return m_bLocallyOwned; }
    const std::vector<std::string>&     getAcl()
        { return m_vAcl; }
    AccountHandler*                     getAclAccount()
        { return m_pAclAccount; }
    void                                setAcl(const std::vector<std::string> vAcl);
    

    // import/export management
    ABI_Collab_Import*                  getImport(void)
        { return &m_Import; }
    ABI_Collab_Export*                  getExport(void)
        { return &m_Export; }
    void                                push(SessionPacket* pPacket);
    bool                                push(SessionPacket* pPacket, BuddyPtr collaborator);
    void                                maskExport();
    virtual const std::vector<SessionPacket*>&  unmaskExport();
    bool                                isExportMasked(void) const
        { return m_bExportMasked; }
    void                                import(SessionPacket* pPacket, BuddyPtr collaborator);
    void                                addChangeAdjust(ChangeAdjust* pAdjust);
    const AbstractChangeRecordSessionPacket* getActivePacket() const
        { return m_pActivePacket; }

    // document management
    PD_Document*                        getDocument(void) const
        { return m_pDoc; }

    const UT_UTF8String                 getSessionId() const
        { return m_sId; }
    bool                                isLocallyControlled() const
        { return m_pController == NULL; }
    
    void                                setIsReverting(bool bIsReverting)
        { m_bIsReverting = bIsReverting; }
    
    // session takeover
    void                                initiateSessionTakeover(BuddyPtr pNewMaster);
    
    // session recording functionality
    bool                                isRecording()
        { return m_pRecorder != NULL; }
    void                                startRecording(SessionRecorderInterface* pRecorder);
    void                                stopRecording();

    // mouse listener functionality
    virtual void                        signalMouse(EV_EditBits eb, UT_sint32 xPos, UT_sint32 yPos);
    virtual void                        removeMouse(EV_Mouse* pMouse);

protected:
    // TODO: make all Packets shared pointers, so this isn't needed anymore
    class SessionPacketVector : public std::vector<SessionPacket*>
    {
    public:
        ~SessionPacketVector() { clear(); } // so it's autocleaned on destroy!
        void clear()
        {
            for (size_t i=0; i<size(); ++i)
            {
                DELETEP((*this)[i]);
            }
            std::vector<SessionPacket*>::clear();
        };
    } m_vecMaskedPackets; // packets that are generated during the import of a packet

private:
    // collaborator management
    void                                _removeCollaborator(BuddyPtr pCollaborator, const std::string& docUUID);
    void                                _checkRevokeAccess(BuddyPtr pCollaborator);


    // document management
    void                                _setDocument(PD_Document* pDoc);
    void                                _setDocListenerId(UT_uint32 iDocListenerId)
        { m_iDocListenerId = iDocListenerId; }
    
    void                                _fillRemoteRev(Packet* pPacket, BuddyPtr pBuddy); 

    // mouse listener functionality
    void                                _releaseMouseDrag();

    // session takeover
    bool                                _handleSessionTakeover(AbstractSessionTakeoverPacket* pPacket, BuddyPtr collaborator);
    bool                                _hasAckedSessionTakeover(BuddyPtr collaborator);
    bool                                _allSlavesAckedSessionTakeover();
    void                                _switchMaster();
    void                                _becomeMaster();
    bool                                _restartAsSlave(const UT_UTF8String& sDocUUID, UT_sint32 iRev);
    void                                _shutdownAsMaster();
    bool                                _allSlavesReconnected();
    void                                _checkRestartAsMaster();
    void                                _restartAsMaster();
    void                                _pushOutgoingQueue();

    PD_Document *                       m_pDoc;
    ABI_Collab_Import                   m_Import;
    ABI_Collab_Export                   m_Export;

    // buddy <-> remote document UUID mapping
    std::map<BuddyPtr, std::string>     m_vCollaborators;
    std::vector<std::string>            m_vAcl;
    AccountHandler*                     m_pAclAccount;
    UT_uint32                           m_iDocListenerId;
    bool                                m_bExportMasked;

    UT_UTF8String                       m_sId;

    BuddyPtr                            m_pController;
    bool                                m_bLocallyOwned;

    CommandLine *                       m_pCommandLine;
    bool                                m_bCloseNow;

    const AbstractChangeRecordSessionPacket* m_pActivePacket;
    bool                                m_bIsReverting;
    
    SessionRecorderInterface*           m_pRecorder;

    std::map<EV_Mouse*, UT_sint32>      m_mMouseListenerIds;
    bool                                m_bDoingMouseDrag;

    std::vector<std::pair<SessionPacket*,BuddyPtr> >
                                        m_vIncomingQueue;


    // session takeover functionality
    SessionTakeoverState                m_eTakeoveState;
    bool                                m_bProposedController;
    BuddyPtr                            m_pProposedController;
    std::map<std::string, bool>         m_vApprovedReconnectBuddies;
    std::map<BuddyPtr, bool>            m_mAckedSessionTakeoverBuddies; // only used by the session controller
    bool                                m_bSessionFlushed;
    SessionPacketVector                 m_vOutgoingQueue;
};

#endif /* ABI_COLLAB_H */

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