// TempPath.h

#if _MSC_VER >= 1000
#pragma once
#endif // _MSC_VER >= 1000

#ifndef TempPathh
#define TempPathh

#include "LocalPath.h"

// Simple class to delete a file when this goes out of scope:
class CAutoDeletePath : public CString {
  bool AutoDelete;
public:
  CAutoDeletePath(bool AutoDelete=true) : AutoDelete(AutoDelete) {}
  CAutoDeletePath(const CString& Path, bool AutoDelete=true) : CString(Path), AutoDelete(AutoDelete) {}
  virtual ~CAutoDeletePath() {try{if(AutoDelete && !IsEmpty()) DeleteFile(*this);}catch(...){ASSERT(0);}}
  void SetAutoDelete(bool Auto=true) {AutoDelete=Auto;}
  bool GetAutoDelete() const {return AutoDelete;}
};

/* Creates a unique Temporary File Name from a Template.
The printf-style Template should use an integer parameter (%04d):
  Save(CTempPath("PXBF%04d.X_B"));
This would produce a file-name like:
"C:\DOCUME~1\rjm\LOCALS~1\Temp\PXBF0021.X_B"
You MUST provide a template to describe the WHOLE File Name, or it can't know if it's generating a duplicate!
*/
struct CTempPath : public CAutoDeletePath, CLocalPath {
  CTempPath(bool AutoDelete=false) : CAutoDeletePath(AutoDelete) {}
  CTempPath(const char* Template, bool AutoDelete=false) : CAutoDeletePath(MakeTempPath(Template),AutoDelete) {ASSERT(CString(Template).Find(':')==-1);}
  virtual ~CTempPath() {}

  const CString& operator=(const CString& stringSrc) {return CString::operator=(stringSrc);}
  const CString& operator=(const char*    stringSrc) {return CString::operator=(stringSrc);}

  static CString MakeTempPath(const char* Template) { // Sets this to the name of a temporary file
    CString Root(GetTempFolder()); // Form a temporary file name
    CString Path;
    int i=0;
    do {
      Path.Format(Template, ++i); // Will Hang if Template doesn't change with i
      Path=(Root + Path);
    } while(GetFileAttributes(Path)!=-1);
    return Path;
  }

  static bool ValidateTempFolder() { // Make sure a temporary folder exists and is writable:
    if(GetTempPath(0,0)==0) return false;
    CTempPath TempPath("CTempPathTest%04d.txt",true);
    CFile File;
    if(File.Open(TempPath,CFile::modeCreate|CFile::modeReadWrite)) {File.Close(); return true;}
    else return false;
  }
};

#endif // ndef TempPathh