CWE-ou-minkata/Sources/Plasma/PubUtilLib/plFile/plStreamSource.h

/*==LICENSE==*

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

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along with this program.  If not, see <http://www.gnu.org/licenses/>.

Additional permissions under GNU GPL version 3 section 7

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*==LICENSE==*/
#ifndef plStreamSource_h_inc
#define plStreamSource_h_inc

#include <map>
#include <mutex>
#include "hsStream.h"

// A class for holding and accessing file streams. The preloader will insert
// files in here once they are loaded. In internal builds, if a requested file
// is not found, it will be retrieved from disk.
class plStreamSource
{
private:
    struct fileData
    {
        plFileName      fFilename; // includes path
        plFileName      fDir; // parent directory
        plString        fExt;
        hsStream*       fStream; // we own this pointer, so clean it up
    };
    std::map<plFileName, fileData, plFileName::less_i> fFileData; // key is filename
    std::mutex fMutex;
    uint32_t fServerKey[4];

    void ICleanup(); // closes all file pointers and cleans up after itself

    plStreamSource();
public:
    ~plStreamSource() {ICleanup();}

    // Force a cleanup of all data (some apps need to get at those file again, and they can't while we have them open)
    void Cleanup() {ICleanup();}

    // File access functions
    hsStream* GetFile(const plFileName& filename); // internal builds will read from disk if it doesn't exist
    std::vector<plFileName> GetListOfNames(const plFileName& dir, const plString& ext); // internal builds merge from disk

    // For other classes to insert files (takes ownership of the stream if successful)
    bool InsertFile(const plFileName& filename, hsStream* stream);

    /** Gets a pointer to our encryption key */
    uint32_t* GetEncryptionKey() { return fServerKey; }

    // Instance handling
    static plStreamSource* GetInstance();
};

#endif // plStreamSource_h_inc