/**

* vim: set ts=4 :

* =============================================================================

* SourceMod

* Copyright (C) 2004-2008 AlliedModders LLC.  All rights reserved.

* =============================================================================

*

* This program is free software; you can redistribute it and/or modify it under

* the terms of the GNU General Public License, version 3.0, as published by the

* Free Software Foundation.

* 

* This program 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.

*

* You should have received a copy of the GNU General Public License along with

* this program.  If not, see <http://www.gnu.org/licenses/>.

*

* As a special exception, AlliedModders LLC gives you permission to link the

* code of this program (as well as its derivative works) to "Half-Life 2," the

* "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software

* by the Valve Corporation.  You must obey the GNU General Public License in

* all respects for all other code used.  Additionally, AlliedModders LLC grants

* this exception to all derivative works.  AlliedModders LLC defines further

* exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),

* or <http://www.sourcemod.net/license.php>.

*

* Version: $Id$

*/

#ifndef _INCLUDE_SOURCEMOD_GAMEDATAFETCHER_H_

#define _INCLUDE_SOURCEMOD_GAMEDATAFETCHER_H_

#include "sourcemod.h"

#include "TextParsers.h"

#include "IThreader.h"

#include "Logger.h"

#include "LibrarySys.h"

#include "ThreadSupport.h"

#include "md5.h"

#include "sm_memtable.h"

enum UpdateStatus

{ 

	Update_Unknown = 0,				/* Version wasn't recognised or version querying is unsupported */

	Update_Current = 1,				/* Server is running latest version */

	Update_NewBuild = 2,			/* Server is on a svn release and a newer version is available */

	Update_MinorAvailable = 3,		/* Server is on a release and a minor release has superceeded it */

	Update_MajorAvailable = 4,		/* Server is on a release and a major release has superceeded it */

	Update_CriticalAvailable = 5,	/* A critical update has been released (security fixes etc) */

};

class BuildMD5ableBuffer : public ITextListener_SMC

{

public:

	BuildMD5ableBuffer()

	{

		stringTable = new BaseStringTable(2048);

		md5[0] = 0;

		md5String[0] = 0;

	}

	~BuildMD5ableBuffer()

	{

		delete stringTable;

	}

	void ReadSMC_ParseStart()

	{

		checksum = MD5();

	}

	SMCResult ReadSMC_KeyValue(const SMCStates *states, const char *key, const char *value)

	{

		stringTable->AddString(key);

		stringTable->AddString(value);

		return SMCResult_Continue;

	}

	SMCResult ReadSMC_NewSection(const SMCStates *states, const char *name)

	{

		stringTable->AddString(name);

		return SMCResult_Continue;

	}

	void ReadSMC_ParseEnd(bool halted, bool failed)

	{

		if (halted || failed)

		{

			return;

		}

		void *data = stringTable->GetMemTable()->GetAddress(0);

		if (data != NULL)

		{

			checksum.update((unsigned char *)data, stringTable->GetMemTable()->GetActualMemUsed());

		}

		checksum.finalize();

		checksum.hex_digest(md5String);

		checksum.raw_digest(md5);

		stringTable->Reset();

	}

	unsigned char * GetMD5()

	{

		return md5;

	}

	unsigned char * GetMD5String()

	{

		return (unsigned char *)&md5String[0];

	}

private:

	MD5 checksum;

	unsigned char md5[16];

	char md5String[33];

	BaseStringTable *stringTable;

};

struct FileData

{

	SourceHook::String *filename;

	unsigned char checksum[33];

};

class FetcherThread : public IThread

{

public:

	FetcherThread() 

	{

		//filenames = new BaseStringTable(200);

		memtable = new BaseMemTable(4096);

	}

	~FetcherThread()

	{

		//delete filenames;

		SourceHook::CVector<FileData *>::iterator iter = filenames.begin();

		FileData *curData;

		while (iter != filenames.end())

		{

			curData = (*iter);

			delete curData->filename;

			delete curData;

			iter = filenames.erase(iter);

		}

	}

	void RunThread(IThreadHandle *pHandle);

	void OnTerminate(IThreadHandle *pHandle, bool cancel);

private:

	int BuildGameDataQuery(char *buffer, int maxlen);

	void ProcessGameDataQuery(int SocketDescriptor);

	/* These names are a lie. It's really NoMoreBlockingThan10Seconds */

	int NonBlockingRecv(int socketDescriptor, char *buffer, int len);

	int NonBlockingSend(int socketDescriptor, char *buffer, int len);

	int ConnectSocket();

	void HandleUpdateStatus(UpdateStatus status, short version[4]);

public:

	SourceHook::CVector<FileData *> filenames;

private:

	BaseMemTable *memtable;

};

extern BuildMD5ableBuffer g_MD5Builder;

extern bool g_blockGameDataLoad;

#endif // _INCLUDE_SOURCEMOD_GAMEDATAFETCHER_H_