/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 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_FILEUTILS
#define OSGDB_FILEUTILS 1

#include <osgDB/Registry>

#include <vector>
#include <deque>
#include <string>


namespace osgDB {

enum CaseSensitivity
{
    CASE_SENSITIVE,
    CASE_INSENSITIVE,
};

enum FileType
{
    FILE_NOT_FOUND,
    REGULAR_FILE,
    DIRECTORY,
};


/** return true if a file exisits. */
extern OSGDB_EXPORT bool fileExists(const std::string& filename);

/** return type of file. */
extern OSGDB_EXPORT FileType fileType(const std::string& filename);

/** find specified file in specified file path.*/
extern OSGDB_EXPORT std::string findFileInPath(const std::string& filename, const FilePathList& filePath,CaseSensitivity caseSensitivity=CASE_SENSITIVE);

/** return the directory/filename of a file if its is contained within specified directory.
  * return "" if directory does not contain file.  If caseInsensitive is set to true then
  * a case insensitive comparison is used to compare fileName to directory contents.
  * This is useful when unix programs attempt read case insentive windows filenames.
  */
extern OSGDB_EXPORT std::string findFileInDirectory(const std::string& fileName,const std::string& dirName,CaseSensitivity caseSensitivity=CASE_SENSITIVE);

/** simple list of names to represent a directory's contents. */
typedef std::vector<std::string> DirectoryContents;

/** return the contents of a directory.
  * returns an empty array on any error.*/
extern OSGDB_EXPORT DirectoryContents getDirectoryContents(const std::string& dirName);



inline void setDataFilePathList(const FilePathList& filepath) { osgDB::Registry::instance()->setDataFilePathList(filepath); }

inline void setDataFilePathList(const std::string& paths) { osgDB::Registry::instance()->setDataFilePathList(paths); }

inline FilePathList& getDataFilePathList() { return osgDB::Registry::instance()->getDataFilePathList(); }

extern OSGDB_EXPORT std::string findDataFile(const std::string& filename,CaseSensitivity caseSensitivity=CASE_SENSITIVE);

/** Convinience class for pushing a path on construction, and popping the path
  * and destruction.  This helps keep the addition of a path local to a block
  * of code, even in the presence of exceptions.*/
class PushAndPopDataPath
{
    public:
        PushAndPopDataPath(const std::string& path)
        {
            getDataFilePathList().push_front(path);
        }

        ~PushAndPopDataPath()
        {
            getDataFilePathList().pop_front();
        }
};


inline void setLibraryFilePathList(const FilePathList& filepaths) { osgDB::Registry::instance()->setLibraryFilePathList(filepaths); }

inline void setLibraryFilePathList(const std::string& paths) { osgDB::Registry::instance()->setLibraryFilePathList(paths); }

inline FilePathList& getLibraryFilePathList() { return osgDB::Registry::instance()->getLibraryFilePathList(); }

extern OSGDB_EXPORT std::string findLibraryFile(const std::string& filename,CaseSensitivity caseSensitivity=CASE_SENSITIVE);

/** convert a string containing a list of paths  deliminated either with ';' (Windows) or ':' (All other platforms) into FilePath represetation.*/
extern OSGDB_EXPORT void convertStringPathIntoFilePathList(const std::string& paths,FilePathList& filepath);

extern OSGDB_EXPORT void appendPlatformSpecificLibraryFilePaths(FilePathList& filepath);

}

#endif