#ifndef NAV_H
#define NAV_H
///////////////////////////////////////////////////////////////
//  nav.h    --    recursively walk a directory tree         //
//  ver 1.2        starting at a specified path              //
//                                                           //
//  Language:      Visual C++, ver 5.0                       //
//  Platform:      Micron Dual Pentium 200, Windows NT 4.0   //
//  Application:   CSE687 Project #1, S98                    //
//  Author:        Jim Fawcett, CST 2-187, (315) 443-3948    //
//                 fawcett@neptune.syr.edu                   //
///////////////////////////////////////////////////////////////
/*
    Manual Page
    -----------

    class navig Operations:
    -----------------------
    The navig class walks a directory (sub)tree.  Root of the
    walk is passed to member function start.  The root can be
    any valid path including "." and ".."

      navig nav;            construct a navigator object
      dProc *pDisp = new userProc;
                            create a user-defined display object
                            publically derived from dProc
      nav.use(pDisp);       use a user-defined display object
      nav.start(root);      start a recursive walk at root

    When the walk is completed the starting directory will be
    restored.

*/
///////////////////////////////////////////////////////////////
//                      maintenance page                     //
///////////////////////////////////////////////////////////////
//  Build Process                                            //
//                                                           //
//  Files Required:                                          //
//    nav.h, nav.cpp                                         //
//                                                           //
//  Building with Visual C++ , ver 5.0, from command line:   //
//    cl -GX -DTEST_NAV nav.cpp                              //
//                                                           //
///////////////////////////////////////////////////////////////
/*

    Maintenance History
    ===================
      ver 1.2 : 27 Apr 99
        - cosmetic changes to these pages
      ver 1.1 : 22 Apr 99
        - cosmetic changes to walk and start functions
      ver 1.0 : 30 Jan 98
        - first release

*/
//

///////////////////////////////////////////////////////////////
//                         Declarations                      //
///////////////////////////////////////////////////////////////


#include <string>
#include <windows.h>

using namespace std;


//----< default display processor >----------------------------

class dProc {

public:
  virtual ~dProc() { }
  virtual void dirsProc(const char *dir);
  virtual void fileProc(const WIN32_FIND_DATA *fd);
};


//----< directory navigator >----------------------------------

class navig {

public:

  navig();                        // save user's dir
  ~navig();                       // restore user's dir
  void use(dProc *dp);            // replace display proc'r
  void start(string dir);         // start dir navigation

private:
  string userDir;                 // user's working directory
  dProc  *p;                      // provides extendable displays
  void   walk(const string &dir); // directory walker
};


#endif