// This code implementation is the intellectual property of
// the RD44 GEANT4 collaboration.
//
// By copying, distributing or modifying the Program (or any work
// based on the Program) you indicate your acceptance of this statement,
// and all its terms.
//
// $Id: G4VBasicShell.hh,v 2.2 1998/07/12 03:00:16 urbi Exp $
// GEANT4 tag $Name: geant4-00 $
//

#ifndef G4VBasicShell_H
#define G4VBasicShell_H 1

class G4UIcommandTree;
class G4UIcommand;

#include "G4UIsession.hh"
#include "globals.hh"

class G4VBasicShell : public G4UIsession
{
  public:
    G4VBasicShell();
    virtual ~G4VBasicShell();

    virtual G4UIsession* SessionStart() = 0;
    // null should be returned for interactive session

    virtual void PauseSessionStart(G4String Prompt) = 0;
    // Prompt string can be ignored

  protected:
    G4String ModifyToFullPathCommand(const char* aCommandLine);
    // convert "BeamOn 10" to "/run/BeamOn 10" if the
    // current working directory is "/run/"

    G4String GetCurrentWorkingDirectory();
    // directory string starts with '/' and ends with '/'

    G4bool ChangeDirectory(const char* newDir);
    // change directory to newDir
    // false will be returned if the target directory doesn't exist

    G4UIcommandTree* FindDirectory(const char* dirName);
    // find G4UIcommandTree object
    // null returned if the taregt does not exist

    G4UIcommand* FindCommand(const char* commandName);
    // find G4UIcommand object
    // null returned if the target does not exist

  private:
    G4String currentDirectory;

    G4String ModifyPath(G4String tempPath);
};

#endif