/** 
 * @file lltransfertargetfile.cpp
 * @brief Transfer system for receiving a file.
 *
 * $LicenseInfo:firstyear=2006&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#include "linden_common.h"

#include "lltransfertargetfile.h"
#include "llerror.h"




LLTransferTargetFile::LLTransferTargetFile(
	const LLUUID& uuid,
	LLTransferSourceType src_type) :
	LLTransferTarget(LLTTT_FILE, uuid, src_type),
	mFP(NULL)
{
}

LLTransferTargetFile::~LLTransferTargetFile()
{
	if (mFP)
	{
		LL_ERRS() << "LLTransferTargetFile::~LLTransferTargetFile - Should have been cleaned up in completion callback" << LL_ENDL;
		fclose(mFP);
		mFP = NULL;
	}
}

// virtual
bool LLTransferTargetFile::unpackParams(LLDataPacker& dp)
{
	// we can safely ignore this call
	return true;
}

void LLTransferTargetFile::applyParams(const LLTransferTargetParams &params)
{
	if (params.getType() != mType)
	{
		LL_WARNS() << "Target parameter type doesn't match!" << LL_ENDL;
		return;
	}
	
	mParams = (LLTransferTargetParamsFile &)params;
}

LLTSCode LLTransferTargetFile::dataCallback(const S32 packet_id, U8 *in_datap, const S32 in_size)
{
	//LL_INFOS() << "LLTransferTargetFile::dataCallback" << LL_ENDL;
	//LL_INFOS() << "Packet: " << packet_id << LL_ENDL;

	if (!mFP)
	{
		mFP = LLFile::fopen(mParams.mFilename, "wb");		/* Flawfinder: ignore */		

		if (!mFP)
		{
			LL_WARNS() << "Failure opening " << mParams.mFilename << " for write by LLTransferTargetFile" << LL_ENDL;
			return LLTS_ERROR;
		}
	}
	if (!in_size)
	{
		return LLTS_OK;
	}

	S32 count = (S32)fwrite(in_datap, 1, in_size, mFP);
	if (count != in_size)
	{
		LL_WARNS() << "Failure in LLTransferTargetFile::dataCallback!" << LL_ENDL;
		return LLTS_ERROR;
	}
	return LLTS_OK;
}

void LLTransferTargetFile::completionCallback(const LLTSCode status)
{
	LL_INFOS() << "LLTransferTargetFile::completionCallback" << LL_ENDL;
	if (mFP)
	{
		fclose(mFP);
	}

	// Still need to gracefully handle error conditions.
	switch (status)
	{
	case LLTS_DONE:
		break;
	case LLTS_ABORT:
	case LLTS_ERROR:
		// We're aborting this transfer, we don't want to keep this file.
		LL_WARNS() << "Aborting file transfer for " << mParams.mFilename << LL_ENDL;
		if (mFP)
		{
			// Only need to remove file if we successfully opened it.
			LLFile::remove(mParams.mFilename);
		}
	default:
		break;
	}

	mFP = NULL;
	if (mParams.mCompleteCallback)
	{
		mParams.mCompleteCallback(status, mParams.mUserData);
	}
}
