/*
  ==============================================================================

   This file is part of the JUCE library - "Jules' Utility Class Extensions"
   Copyright 2004-10 by Raw Material Software Ltd.

  ------------------------------------------------------------------------------

   JUCE can be redistributed and/or modified under the terms of the GNU General
   Public License (Version 2), as published by the Free Software Foundation.
   A copy of the license is included in the JUCE distribution, or can be found
   online at www.gnu.org/licenses.

   JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
   A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

  ------------------------------------------------------------------------------

   To release a closed-source product which uses JUCE, commercial licenses are
   available: visit www.rawmaterialsoftware.com/juce for more information.

  ==============================================================================
*/

#include "../../core/juce_StandardHeader.h"

BEGIN_JUCE_NAMESPACE

#include "juce_TemporaryFile.h"
#include "../../maths/juce_Random.h"
#include "../../threads/juce_Thread.h"


//==============================================================================
TemporaryFile::TemporaryFile (const String& suffix, const int optionFlags)
{
    createTempFile (File::getSpecialLocation (File::tempDirectory),
                    "temp_" + String (Random::getSystemRandom().nextInt()),
                    suffix,
                    optionFlags);
}

TemporaryFile::TemporaryFile (const File& targetFile_, const int optionFlags)
    : targetFile (targetFile_)
{
    // If you use this constructor, you need to give it a valid target file!
    jassert (targetFile != File::nonexistent);

    createTempFile (targetFile.getParentDirectory(),
                    targetFile.getFileNameWithoutExtension() + "_temp" + String (Random::getSystemRandom().nextInt()),
                    targetFile.getFileExtension(),
                    optionFlags);
}

void TemporaryFile::createTempFile (const File& parentDirectory, String name,
                                    const String& suffix, const int optionFlags)
{
    if ((optionFlags & useHiddenFile) != 0)
        name = "." + name;

    temporaryFile = parentDirectory.getNonexistentChildFile (name, suffix, (optionFlags & putNumbersInBrackets) != 0);
}

TemporaryFile::~TemporaryFile()
{
    if (! deleteTemporaryFile())
    {
        /* Failed to delete our temporary file! The most likely reason for this would be
           that you've not closed an output stream that was being used to write to file.

           If you find that something beyond your control is changing permissions on
           your temporary files and preventing them from being deleted, you may want to
           call TemporaryFile::deleteTemporaryFile() to detect those error cases and
           handle them appropriately.
        */
        jassertfalse;
    }
}

//==============================================================================
bool TemporaryFile::overwriteTargetFileWithTemporary() const
{
    // This method only works if you created this object with the constructor
    // that takes a target file!
    jassert (targetFile != File::nonexistent);

    if (temporaryFile.exists())
    {
        // Have a few attempts at overwriting the file before giving up..
        for (int i = 5; --i >= 0;)
        {
            if (temporaryFile.moveFileTo (targetFile))
                return true;

            Thread::sleep (100);
        }
    }
    else
    {
        // There's no temporary file to use. If your write failed, you should
        // probably check, and not bother calling this method.
        jassertfalse;
    }

    return false;
}

bool TemporaryFile::deleteTemporaryFile() const
{
    // Have a few attempts at deleting the file before giving up..
    for (int i = 5; --i >= 0;)
    {
        if (temporaryFile.deleteFile())
            return true;

        Thread::sleep (50);
    }

    return false;
}

END_JUCE_NAMESPACE