CWE-ou-minkata/Sources/Plasma/NucleusLib/inc/hsResMgr.h

/*==LICENSE==*

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Copyright (C) 2011  Cyan Worlds, Inc.

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*==LICENSE==*/
#ifndef hsResMgr_inc
#define hsResMgr_inc

#include "HeadSpin.h"
#include "hsRefCnt.h"
#include "plLoadMask.h"
#include "plRefFlags.h"
#include "pnKeyedObject/plKey.h"

class hsStream;
class plKeyImp;
class hsKeyedObject;
class plRefMsg;
class plUoid;
class plLocation;
class plCreatable;
class plDispatchBase;

class hsResMgr : public hsRefCnt
{
public:
    //---------------------------
    //  Load and Unload
    //---------------------------
    virtual void  Load  (const plKey& objKey)=0;     // places on list to be loaded
    virtual bool  Unload(const plKey& objKey)=0;       // Unregisters (deletes) an object, Return true if successful
    virtual plKey CloneKey(const plKey& objKey)=0;

    //---------------------------
    //  Finding Functions
    //---------------------------
    virtual plKey FindKey(const plUoid& uoid)=0;    

    //---------------------------
    //  Establish reference linkage 
    //---------------------------
    virtual bool  AddViaNotify(const plKey& sentKey, plRefMsg* msg, plRefFlags::Type flags)=0;
    virtual bool  AddViaNotify(plRefMsg* msg, plRefFlags::Type flags)=0; // msg->fRef->GetKey() == sentKey

    virtual bool  SendRef(const plKey& key, plRefMsg* refMsg, plRefFlags::Type flags)=0;
    virtual bool  SendRef(hsKeyedObject* ko, plRefMsg* refMsg, plRefFlags::Type flags)=0;

    //---------------------------
    //  Reading and Writing keys
    //---------------------------
    // Read a Key in, and Notify me when the Object is loaded
    virtual plKey ReadKeyNotifyMe(hsStream* s, plRefMsg* retMsg, plRefFlags::Type flags)=0; 
    // Just read the Key data in and find a match in the registry and return it.
    virtual plKey ReadKey(hsStream* s)=0; 

    // For convenience you can write a key using the KeyedObject or the Key...same result
    virtual void WriteKey(hsStream* s, hsKeyedObject* obj)=0; 
    virtual void WriteKey(hsStream* s, const plKey& key)=0; 

    //---------------------------
    //  Reading and Writing Objects directly
    //---------------------------
    virtual plCreatable*    ReadCreatable(hsStream* s)=0;
    virtual void            WriteCreatable(hsStream* s, plCreatable* cre)=0;

    virtual plCreatable*    ReadCreatableVersion(hsStream* s)=0;
    virtual void            WriteCreatableVersion(hsStream* s, plCreatable* cre)=0;
    
    //---------------------------
    // Registry Modification Functions
    //---------------------------
    virtual plKey NewKey(const plString& name, hsKeyedObject* object, const plLocation& loc, const plLoadMask& m = plLoadMask::kAlways)=0;
    virtual plKey NewKey(plUoid& newUoid, hsKeyedObject* object)=0;

    virtual plDispatchBase* Dispatch()=0;

    virtual void BeginShutdown() {}

protected:
    friend class hsKeyedObject;
    friend class plKey;
    friend class plKeyImp;
    friend class plArmatureMod; // Temp hack until a findkey/clone issue is fixed. -Bob

    virtual plKey   ReRegister(const plString& nm, const plUoid& oid)=0;
    virtual bool    ReadObject(plKeyImp* key)=0;  // plKeys call this when needed

    // Sets a key as used or unused in the registry.  When all keys in a page of a
    // particular type in an page are unused, we can free the memory associated with them.
    // Only called by plKeyImp
    virtual void IKeyReffed(plKeyImp* key)=0;
    virtual void IKeyUnreffed(plKeyImp* key)=0;

protected:  // hsgResMgr only
    friend class hsgResMgr;
    virtual bool IReset()=0;
    virtual bool IInit()=0;
    virtual void IShutdown()=0;
};


class hsgResMgr
{
private:
    static hsResMgr* fResMgr;

public:
    static hsResMgr* ResMgr() { return (hsResMgr*)fResMgr; }

    static plDispatchBase* Dispatch() { hsAssert(fResMgr, "No resmgr"); return fResMgr->Dispatch(); }

    static bool Init(hsResMgr* m);
    static bool Reset() { return fResMgr->IReset(); }
    static void Shutdown();
    
    static bool SendRef(plKey& key, plRefMsg* refMsg, plRefFlags::Type flags) { return fResMgr->SendRef(key, refMsg, flags); }
    static bool SendRef(hsKeyedObject* ko, plRefMsg* refMsg, plRefFlags::Type flags) { return fResMgr->SendRef(ko, refMsg, flags); }
};

#endif // hsResMgr_inc