FileWatcher.h

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#ifndef _FW_FILEWATCHER_H_
#define _FW_FILEWATCHER_H_

#include "FileWatcherWin32Header.h"
#include <string>
#include <stdexcept>

namespace FW
{
typedef std::string String;
typedef unsigned long WatchID;

// forward declarations
class FileWatcherImpl;
class FileWatchListener;

class Exception : public std::runtime_error
{
public:
  Exception(const String& message)
    : std::runtime_error(message)
  {}
};

class FileNotFoundException : public Exception
{
public:
  FileNotFoundException()
    : Exception("File not found")
  {}
  
  FileNotFoundException(const String& filename,
                        const String message = "")
    : Exception(message + "File not found (" + filename + ")")
  {}
};

namespace Actions
{
enum Action
{
  Add = 1,
  Delete = 2,
  Modified = 4
};
};
typedef Actions::Action Action;

class FileWatcher_EXPORT FileWatcher
{
public:
  FileWatcher();

  virtual ~FileWatcher();

  WatchID addWatch(const String& directory,
                   FileWatchListener* watcher,
                   bool recursive = false);

  void removeWatch(const String& directory);

  void removeWatch(WatchID watchid);

  void update();

private:
  FileWatcherImpl* mImpl;

};//end FileWatcher


class FileWatchListener
{
public:
  FileWatchListener() {}
  virtual ~FileWatchListener() {}

  virtual void handleFileAction(WatchID watchid,
                                const String& dir,
                                const String& filename,
                                Action action) = 0;

};//class FileWatchListener

};//namespace FW

#endif//_FW_FILEWATCHER_H_