/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield 
 *
 * This library is open source and may be redistributed and/or modified under  
 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
 * (at your option) any later version.  The full license is in LICENSE file
 * included with this distribution, and on the openscenegraph.org website.
 * 
 * This library 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 
 * OpenSceneGraph Public License for more details.
*/

#ifndef OSGDB_CALLBACKS
#define OSGDB_CALLBACKS 1

#include <osgDB/AuthenticationMap>
#include <osgDB/ReaderWriter>
#include <osgDB/FileCache>

#include <deque>
#include <list>
#include <iosfwd>

namespace osgDB {

/** list of directories to search through which searching for files. */
typedef std::deque<std::string> FilePathList;

enum CaseSensitivity
{
    CASE_SENSITIVE,
    CASE_INSENSITIVE
};

// forward decare
class Options;

class OSGDB_EXPORT FindFileCallback : public virtual osg::Referenced
{
    public:

        virtual std::string findDataFile(const std::string& filename, const Options* options, CaseSensitivity caseSensitivity);

        virtual std::string findLibraryFile(const std::string& filename, const Options* options, CaseSensitivity caseSensitivity);

    protected:
        virtual ~FindFileCallback() {}
};


class OSGDB_EXPORT ReadFileCallback : public virtual osg::Referenced
{
    public:

        virtual ReaderWriter::ReadResult openArchive(const std::string& filename,ReaderWriter::ArchiveStatus status, unsigned int indexBlockSizeHint, const Options* useObjectCache);

        virtual ReaderWriter::ReadResult readObject(const std::string& filename, const Options* options);

        virtual ReaderWriter::ReadResult readImage(const std::string& filename, const Options* options);

        virtual ReaderWriter::ReadResult readHeightField(const std::string& filename, const Options* options);

        virtual ReaderWriter::ReadResult readNode(const std::string& filename, const Options* options);

        virtual ReaderWriter::ReadResult readShader(const std::string& filename, const Options* options);

    protected:
        virtual ~ReadFileCallback() {}
};

class OSGDB_EXPORT WriteFileCallback : public virtual osg::Referenced
{
    public:

        virtual ReaderWriter::WriteResult writeObject(const osg::Object& obj, const std::string& fileName,const Options* options);

        virtual ReaderWriter::WriteResult writeImage(const osg::Image& obj, const std::string& fileName,const Options* options);

        virtual ReaderWriter::WriteResult writeHeightField(const osg::HeightField& obj, const std::string& fileName,const Options* options);

        virtual ReaderWriter::WriteResult writeNode(const osg::Node& obj, const std::string& fileName,const Options* options);

        virtual ReaderWriter::WriteResult writeShader(const osg::Shader& obj, const std::string& fileName,const Options* options);

    protected:
        virtual ~WriteFileCallback() {}
};

class OSGDB_EXPORT FileLocationCallback : public virtual osg::Referenced
{
    public:

        enum Location
        {
            LOCAL_FILE,
            REMOTE_FILE
        };

        virtual Location fileLocation(const std::string& filename, const Options* options) = 0;

        virtual bool useFileCache() const = 0;

    protected:
        virtual ~FileLocationCallback() {}
};

}

#endif // OSGDB_OPTIONS