Method SaveChunkToData

src/WorldStorage/WSSCompact.cpp:943–993

bool cWSSCompact::cPAKFile::SaveChunkToData(const cChunkCoords & a_Chunk, cWorld * a_World)
{
	// Serialize the chunk:
	cJsonChunkSerializer Serializer;
	if (!a_World->GetChunkData(a_Chunk.m_ChunkX, a_Chunk.m_ChunkZ, Serializer))
	{
		// Chunk not valid
		LOG("cWSSCompact: Trying to save chunk [%d, %d, %d] that has no data, ignoring request.", a_Chunk.m_ChunkX, a_Chunk.m_ChunkY, a_Chunk.m_ChunkZ);
		return false;
	}

	AString Data;
	Data.assign((const char *)Serializer.GetBlockData(), cChunkDef::BlockDataSize);
	if (Serializer.HasJsonData())
	{
		AString JsonData;
		Json::StyledWriter writer;
		JsonData = writer.write(Serializer.GetRoot());
		Data.append(JsonData);
	}
	
	// Compress the data:
	AString CompressedData;
	int errorcode = CompressString(Data.data(), Data.size(), CompressedData, m_CompressionFactor);
	if ( errorcode != Z_OK )
	{
		LOGERROR("Error %i compressing data for chunk [%d, %d, %d]", errorcode, a_Chunk.m_ChunkX, a_Chunk.m_ChunkY, a_Chunk.m_ChunkZ);
		return false;
	}
	
	// Erase any existing data for the chunk:
	EraseChunkData(a_Chunk);
	
	// Save the header:
	sChunkHeader * Header = new sChunkHeader;
	if (Header == NULL)
	{
		LOGWARNING("Cannot create a new chunk header to save chunk [%d, %d, %d]", a_Chunk.m_ChunkX, a_Chunk.m_ChunkY, a_Chunk.m_ChunkZ);
		return false;
	}
	Header->m_CompressedSize = (int)CompressedData.size();
	Header->m_ChunkX = a_Chunk.m_ChunkX;
	Header->m_ChunkZ = a_Chunk.m_ChunkZ;
	Header->m_UncompressedSize = (int)Data.size();
	m_ChunkHeaders.push_back(Header);
	
	m_DataContents.append(CompressedData.data(), CompressedData.size());
	
	m_NumDirty++;
	return true;
}