ChunkRepr.h

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#pragma once

#include "swCommonLib/Common/TypesDefinitions.h"

#include "swCommonLib/HierarchicalChunkedFormat/Headers/ChunkHeader.h"
#include "swCommonLib/HierarchicalChunkedFormat/Chunk.h"
#include "swCommonLib/HierarchicalChunkedFormat/Internal/AttributeRepr.h"
#include "swCommonLib/HierarchicalChunkedFormat/Attribute.h"


namespace sw
{

class ChunkRepr;
DEFINE_PTR_TYPE( ChunkRepr );
DEFINE_WPTR_TYPE( ChunkRepr );

class ImplHCF;


class ChunkRepr : public std::enable_shared_from_this< ChunkRepr >
{
    FRIEND_CLASS_TESTER( HCF );
    FRIEND_CLASS_TESTER( ChunkRepr );
private:
    ImplHCF*        m_hcf;

    ChunkHeader     m_header;

    Size            m_absolutOffset;    

    ChunkReprWPtr   m_parent;           
    ChunkReprPtr    m_nextChunk;        
    ChunkReprPtr    m_childChunk;       

    AttributeReprPtr    m_firstAttrib;  

    DataUPack       m_data;             

private:
    ChunkRepr                   ( ImplHCF* hcf, ChunkReprPtr& parent );
    ChunkRepr                   ( ImplHCF* hcf, ChunkReprPtr& parent, Size fileOffset );

public:
    static ChunkReprPtr     CreateFromFile  ( ImplHCF* hcf, ChunkReprPtr parent, Size fileOffset );
    static ChunkReprPtr     Create          ( ImplHCF* hcf, ChunkReprPtr parent );


    Chunk       CreateChunk     ();

    Chunk       NextChunk       ();

    Chunk       FirstChild      ();

    bool        HasChildren     () const;

    Chunk       ParentChunk     ();


    Attribute   AddAttribute    ( AttributeType type, const DataPtr data, Size dataSize );
    bool        Fill            ( const DataPtr data, Size dataSize );

    DataUPack   StealData       ();

    DataPack    AccessData      ();

    void        AddNextChunk    ( ChunkReprPtr& newChunk );


    bool        CheckValidity   () const;

private:
    bool        CanAddAttribute () const;
    bool        CanCreateChunk  () const;
    bool        CanFillData     () const;
    bool        CanLoadData     () const;

    void        WriteHeader     ( Size revertOffset );
    void        LoadHeader      ( Size revertOffset );
    void        UpdateHeader    ();                         

    DataUPack   LoadData        ();
};


}   // sw