CWE-ou-minkata/Sources/Plasma/NucleusLib/pnNetCommon/plSynchedObject.h

/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011  Cyan Worlds, Inc.

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If you modify this Program, or any covered work, by linking or
combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
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*==LICENSE==*/
#ifndef PLSYNCHOBJ_inc
#define PLSYNCHOBJ_inc

#include "HeadSpin.h"
#include "pnKeyedObject/hsKeyedObject.h"
#include "pnKeyedObject/plKey.h"
#include "plNetGroup.h"

/////////////////////////////////////
// plSynchedObject
// one per savable object
/////////////////////////////////////
class hsStream;
class plDirtyNotifier;
class plSynchedObject : public hsKeyedObject
{
public:
    enum LocallyOwnedAnswer
    {
        kNo=false,
        kYes=true
    };

    enum Flags  
    {
        kDontDirty              = 0x1,
        kSendReliably           = 0x2,      // object wants reliable send
        kHasConstantNetGroup    = 0x4,      // has a constant net group.
        kDontSynchGameMessages  = 0x8,      // don't send/recv game actions
        kExcludePersistentState = 0x10,     // don't send SDL state msgs to server, check exclude list
        kExcludeAllPersistentState=0x20,    // don't send ANY type of SDL state
        kLocalOnly              = (kExcludeAllPersistentState | kDontSynchGameMessages),    // localOnly in all respects
        kHasVolatileState       = 0x40,     // server won't save this state on shutdown
        kAllStateIsVolatile      = 0x80
    };

    enum SDLSendFlags   
    {
        kBCastToClients         = 0x1,
        kForceFullSend          = 0x2,
        kSkipLocalOwnershipCheck= 0x4,
        kSendImmediately        = 0x8,
        kDontPersistOnServer    = 0x10,     // for an SDL bcast msg which is used for synching only, not persisting
        kUseRelevanceRegions    = 0x20,
        kNewState               = 0x40,
        kIsAvatarState          = 0x80,
    };

    struct StateDefn
    {
        plKey     fObjKey;
        uint32_t  fSendFlags;
        plString  fSDLName;

        plSynchedObject* GetObject() const { return plSynchedObject::ConvertNoRef(fObjKey->ObjectIsLoaded()); }
        StateDefn() : fObjKey(nil),fSendFlags(0) {}
        StateDefn(plKey k, uint32_t f, const plString& sdlName)
            : fObjKey(k), fSendFlags(f), fSDLName(sdlName) { }
    };

private:
    typedef std::vector<plString> SDLStateList;
    SDLStateList fSDLExcludeList;
    SDLStateList fSDLVolatileList;
    uint32_t fSynchFlags;

    plNetGroupId fNetGroup;

    static std::vector<bool> fSynchStateStack;
    static plSynchedObject* fStaticSynchedObj;      // static which temporarily holds address of each object's synchMgr
    static std::vector<StateDefn>   fDirtyStates;

    static void IRemoveDirtyState(plKey o, const plString& sdlName);
    static void IAddDirtyState(plKey o, const plString& sdlName, uint32_t sendFlags);
    bool IOKToDirty(const plString& SDLStateName) const;
    SDLStateList::const_iterator IFindInSDLStateList(const SDLStateList& list, const plString& sdlName) const;
protected:
    bool IOKToNetwork(const plString& sdlName, uint32_t* synchFlags) const;
public:
    plSynchedObject();
    virtual ~plSynchedObject();

    CLASSNAME_REGISTER( plSynchedObject );
    GETINTERFACE_ANY( plSynchedObject, hsKeyedObject);

    virtual bool MsgReceive(plMessage* msg);
    
    // getters
    int GetSynchFlags() const { return fSynchFlags; }
    plNetGroupId GetNetGroup() const { return fNetGroup; };
    plNetGroupId GetEffectiveNetGroup() const;
    
    // setters
    void SetSynchFlagsBit(uint32_t f) { fSynchFlags |= f; }
    virtual void SetNetGroupConstant(plNetGroupId netGroup);
    virtual void SetNetGroup(plNetGroupId netGroup) { fNetGroup = netGroup; }   
    plNetGroupId SelectNetGroup(plKey groupKey);

    virtual bool DirtySynchState(const plString& sdlName, uint32_t sendFlags);
    void SendSDLStateMsg(const plString& SDLStateName, uint32_t synchFlags);  // don't use, only for net code

    void ClearSynchFlagsBit(uint32_t f) { fSynchFlags &= ~f; }

    // static 
    static bool GetSynchDisabled() { return fSynchStateStack.size() ? fSynchStateStack.back() : true; }
    static void PushSynchDisabled(bool b) { fSynchStateStack.push_back(b); }
    static bool PopSynchDisabled();
    static plSynchedObject* GetStaticSynchedObject() { return fStaticSynchedObj; }
    static int32_t GetNumDirtyStates() { return fDirtyStates.size(); }
    static plSynchedObject::StateDefn* GetDirtyState(int32_t i) { return &fDirtyStates[i]; }
    static void ClearDirtyState(std::vector<StateDefn>& carryOver) { fDirtyStates=carryOver; } 

    // IO 
//  void SendCreationMsg(double secs);
//  void SendDestructionMsg(double secs) ;

    virtual void    Read(hsStream* s, hsResMgr* mgr);
    virtual void    Write(hsStream* s, hsResMgr* mgr);

    int IsLocallyOwned() const;     // returns yes/no/maybe
    
    // disable net synching only
    bool IsNetSynched() const { return (fSynchFlags & kDontSynchGameMessages)==0; }
    void SetNetSynched(bool b) { if (!b) fSynchFlags |= kDontSynchGameMessages; else fSynchFlags &= ~kDontSynchGameMessages;    }

    // disable net synching AND persisting
    bool IsLocalOnly() const { return (fSynchFlags & kLocalOnly)==0;    }
    void SetLocalOnly(bool b) { if (b) fSynchFlags |= kLocalOnly; else fSynchFlags &= ~kLocalOnly;  }

    // disable particular types of persistence
    void AddToSDLExcludeList(const plString&);
    void RemoveFromSDLExcludeList(const plString&);
    bool IsInSDLExcludeList(const plString&) const;

    // make volatile particular types of state
    void AddToSDLVolatileList(const plString&);
    void RemoveFromSDLVolatileList(const plString&);
    bool IsInSDLVolatileList(const plString&) const;

    //
    // synched value stuff, currently unused
    // current size is 16 + numValue bytes*2 + numFriends*4 bytes
    //
#ifdef USE_SYNCHED_VALUES
public:
    typedef uint16_t AddrOffsetType;
    typedef uint8_t NumSynchedValuesType;
    typedef uint16_t FlagsType;
    friend class plSynchedValueBase;

private:
    AddrOffsetType* fSynchedValueAddrOffsets;   // represent uint32_ts offsets
    NumSynchedValuesType fNumSynchedValues;

    // array of friends
    plSynchedValueBase** fSynchedValueFriends;  
    NumSynchedValuesType fNumSynchedValueFriends;

    // dirty callback notifiers
    std::vector<plDirtyNotifier*> fDirtyNotifiers;

    void IAppendSynchedValueAddrOffset(AddrOffsetType synchedValueAddrOffset);
    void IAppendSynchedValueFriend(plSynchedValueBase* v);
    plSynchedValueBase* IGetSynchedValue(NumSynchedValuesType i) const
        { return (plSynchedValueBase*)((int32_t)this + (fSynchedValueAddrOffsets[i]<<2)); }
    plSynchedValueBase* IGetSynchedValueFriend(NumSynchedValuesType i) const
        { return fSynchedValueFriends[i]; }

public:
    int32_t GetNumSynchedValues() const { return fNumSynchedValues+fNumSynchedValueFriends; }
    plSynchedValueBase* GetSynchedValue(int i) const;

    uint8_t RegisterSynchedValue(plSynchedValueBase* v); 
    bool RemoveSynchedValue(plSynchedValueBase* v);       // handles SVFriends too
    void RegisterSynchedValueFriend(plSynchedValueBase* v); 
#endif

#ifdef USE_DIRTY_NOTIFIERS
    // dirty CB notifiers
    void AddDirtyNotifier(plDirtyNotifier* dn);
    void RemoveDirtyNotifier(plDirtyNotifier* dn);
#endif
    void CallDirtyNotifiers();
};

//
// helper class to set dirty tracking on/off within scope
//
class plSynchEnabler
{
public:
    plSynchEnabler(bool enable) { plSynchedObject::PushSynchDisabled(!enable); }
    ~plSynchEnabler() { plSynchedObject::PopSynchDisabled(); }
};

#ifdef USE_DIRTY_NOTIFIERS
///////////////////////////////////
// plDirtyNotifier - When a synchedObj 
// gets dirty, this callback will be called.
///////////////////////////////////
class plDirtyNotifier
{
protected:
    plKey fSynchedObjKey;
    void* fUserData;
public: 
    plDirtyNotifier() : fSynchedObjKey(nil),fUserData(nil) {}
    virtual ~plDirtyNotifier()
    {
        if (fSynchedObjKey)
        {
            plSynchedObject* so = plSynchedObject::ConvertNoRef(fSynchedObjKey->ObjectIsLoaded());
            if (so)
                so->RemoveDirtyNotifier(this);
        }
    }
    
    void SetSynchedObjKey(plKey k) { fSynchedObjKey=k; }    // should be set
    void SetUserData(void* v) { fUserData=v;}               // optional 

    plKey   GetSynchedObjKey() { return fSynchedObjKey; }
    void*   GetUserData() { return fUserData;}

    // override
    virtual void Callback() = 0;
};
#endif

//
// MACROS
//

#ifdef USE_SYNCHED_VALUES
#define SYNCHED_VALUE(type)             plSynchedValue<type>    
#define SYNCHED_TARRAY(type)            plSynchedTArray<type>   
#define SYNCHED_VALUE_FRIEND(type)      plSynchedValueFriend<type>  
#define SYNCHED_TARRAY_FRIEND(type)     plSynchedTArrayFriend<type> 
#else
#define SYNCHED_VALUE(type)             type
#define SYNCHED_TARRAY(type)            hsTArray<type>
#define SYNCHED_VALUE_FRIEND(type)      type
#define SYNCHED_TARRAY_FRIEND(type)     hsTArray<type>
#endif

#endif  // PLSYNCHOBJ_inc