// Copyright 2008, Google Inc. All rights reserved.
//
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// modification, are permitted provided that the following conditions are met:
//
//  1. Redistributions of source code must retain the above copyright notice, 
//     this list of conditions and the following disclaimer.
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//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
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//     used to endorse or promote products derived from this software without
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//
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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// This file contains the TempFile class.

#ifndef KML_BASE_TEMPFILE_H__
#define KML_BASE_TEMPFILE_H__

#include "boost/intrusive_ptr.hpp"
#include "kml/base/file.h"
#include "kml/base/referent.h"

namespace kmlbase {

class TempFile;
typedef boost::intrusive_ptr<kmlbase::TempFile> TempFilePtr;

// A helper class to manage the creation and deletion of temporary files.
// TempFile::CreateTempFile(string) returns a pointer to the class upon
// successful creation of a tempfile. Returns NULL otherwise. The class
// is derived from Referent, which implements the boost::intrusive_ptr
// behavior.
class TempFile : public Referent {
 public:
  static TempFile* CreateTempFile() {
    string tempfile;
    if (!File::CreateNewTempFile(&tempfile)) {
      return NULL;
    }
    return new TempFile(tempfile);
  }
  ~TempFile() {
    if (File::Exists(name_)) {
      File::Delete(name_);
    }
  }
  const string& name() {
    return name_;
  }
 private:
  TempFile(const string& filename) : name_(filename) {
  }
  string name_;
};

}  // end namespace kmlbase

#endif  // KML_BASE_TEMPFILE_H__
