mcserver/source/cFileFormatUpdater.cpp

#include "Globals.h"

#include "cFileFormatUpdater.h"
#include "cMCLogger.h"
#include "Vector3d.h"
#include "Vector3f.h"

#include "cItem.h"
#include <json/json.h>

typedef std::list< std::string > StringList;
StringList GetDirectoryContents( const char* a_Directory );

void cFileFormatUpdater::UpdateFileFormat()
{
	UpdatePlayersOfWorld("world");
}

// Convert player .bin files to JSON
void cFileFormatUpdater::UpdatePlayersOfWorld( const char* a_WorldName )
{
	std::string PlayerDir = std::string( a_WorldName ) + "/player/";

	StringList AllFiles = GetDirectoryContents( PlayerDir.c_str() );
	for( StringList::iterator itr = AllFiles.begin(); itr != AllFiles.end(); ++itr )
	{
		std::string & FileName = *itr;
		if( FileName.rfind(".bin") != std::string::npos ) // Get only the files ending in .bin
		{
			PlayerBINtoJSON( (PlayerDir + FileName).c_str() );
		}
	}
}





#define READ(File, Var) \
	if (File.Read(&Var, sizeof(Var)) != sizeof(Var)) \
	{ \
		LOGERROR("ERROR READING \"%s\" FROM FILE \"%s\"", #Var, a_FileName); \
		return; \
	}

// Converts player binary files to human readable JSON
void cFileFormatUpdater::PlayerBINtoJSON( const char* a_FileName )
{
	Vector3d	PlayerPos;
	Vector3f	PlayerRot;
	short		PlayerHealth = 0;

	const unsigned int NumInventorySlots = 45; // At this time the player inventory has/had 45 slots
	cItem IventoryItems[ NumInventorySlots ];

	cFile f;
	if (!f.Open(a_FileName, cFile::fmRead))
	{
		return;
	}

	// First read player position, rotation and health
	READ(f, PlayerPos.x);
	READ(f, PlayerPos.y);
	READ(f, PlayerPos.z);
	READ(f, PlayerRot.x);
	READ(f, PlayerRot.y);
	READ(f, PlayerRot.z);
	READ(f, PlayerHealth);


	for(unsigned int i = 0; i < NumInventorySlots; i++)
	{
		cItem & Item = IventoryItems[i];
		READ(f, Item.m_ItemID);
		READ(f, Item.m_ItemCount);
		READ(f, Item.m_ItemHealth);
	}
	f.Close();

	// Loaded all the data, now create the JSON data
	Json::Value JSON_PlayerPosition;
	JSON_PlayerPosition.append( Json::Value( PlayerPos.x ) );
	JSON_PlayerPosition.append( Json::Value( PlayerPos.y ) );
	JSON_PlayerPosition.append( Json::Value( PlayerPos.z ) );

	Json::Value JSON_PlayerRotation;
	JSON_PlayerRotation.append( Json::Value( PlayerRot.x ) );
	JSON_PlayerRotation.append( Json::Value( PlayerRot.y ) );
	JSON_PlayerRotation.append( Json::Value( PlayerRot.z ) );

	Json::Value JSON_Inventory;
	for(unsigned int i = 0; i < NumInventorySlots; i++)
	{
		Json::Value JSON_Item;
		IventoryItems[i].GetJson( JSON_Item );
		JSON_Inventory.append( JSON_Item );
	}

	Json::Value root;
	root["position"] = JSON_PlayerPosition;
	root["rotation"] = JSON_PlayerRotation;
	root["inventory"] = JSON_Inventory;
	root["health"] = PlayerHealth;

	Json::StyledWriter writer;
	std::string JsonData = writer.write( root );

	// Get correct filename
	std::string FileName = a_FileName;
	std::string FileNameWithoutExt = FileName.substr(0, FileName.find_last_of(".") );
	std::string FileNameJson = FileNameWithoutExt + ".json";

	// Write to file
	if (!f.Open(FileNameJson.c_str(), cFile::fmWrite))
	{
		return;
	}
	if (f.Write(JsonData.c_str(), JsonData.size()) != JsonData.size())
	{
		LOGERROR("ERROR WRITING PLAYER JSON TO FILE \"%s\"", FileNameJson.c_str());
		return;
	}
	f.Close();

	// Delete old format file, only do this when conversion has succeeded
	if (std::remove(a_FileName) != 0)
	{
		LOGERROR("COULD NOT DELETE old format file \"%s\"", a_FileName);
		return;
	}

	LOGINFO("Successfully converted binary to Json \"%s\"", FileNameJson.c_str() );
}









// Helper function
StringList GetDirectoryContents( const char* a_Directory )
{
	StringList AllFiles;
#ifdef _WIN32
	std::string FileFilter = std::string( a_Directory ) + "*.*";
	HANDLE hFind;
	WIN32_FIND_DATA FindFileData;

	if( ( hFind = FindFirstFile(FileFilter.c_str(), &FindFileData) ) != INVALID_HANDLE_VALUE)
	{
		do
		{
			AllFiles.push_back( FindFileData.cFileName );
		} while( FindNextFile(hFind, &FindFileData) );
		FindClose(hFind);
	}
#else
	DIR *dp;
	struct dirent *dirp;
	if( (dp  = opendir( a_Directory ) ) == NULL) 
	{
		LOGERROR("Error (%i) opening %s\n", errno, a_Directory );
	}
	else
	{
		while ((dirp = readdir(dp)) != NULL) 
		{
			AllFiles.push_back( dirp->d_name );
		}
		closedir(dp);
	}
#endif

	return AllFiles;
}