Danbias/Code/Game/GameLogic/LevelLoader/LevelParser.cpp

/////////////////////////////////////
// Created by Pontus Fransson 2013 //
/////////////////////////////////////

#include "LevelParser.h"
#include "Loader.h"
#include "ParseFunctions.h"

using namespace GameLogic;
using namespace ::LevelFileLoader;
using namespace Utility::DynamicMemory;

LevelParser::LevelParser()
{
	formatVersion.formatVersionMajor = 3;
	formatVersion.formatVersionMinor = 0;
}

LevelParser::~LevelParser()
{
}

std::vector<SmartPointer<ObjectTypeHeader>> LevelParser::Parse(std::wstring filename)
{
	int bufferSize = 0;
	int counter = 0;
	bool loadCgf;

	std::vector<SmartPointer<ObjectTypeHeader>> objects;

	//Read entire level file.
	Loader loader;
	char* buffer = (char*)loader.LoadFile(filename.c_str(), bufferSize);

	// Check if file was loaded, else return empty vector
	if(!buffer)
	{
		return std::vector<SmartPointer<ObjectTypeHeader>>();
	}

	//Read format version
	LevelLoaderInternal::FormatVersion levelFormatVersion;
	ParseObject(&buffer[counter], &levelFormatVersion, sizeof(levelFormatVersion));
	counter += sizeof(levelFormatVersion);
	if(this->formatVersion != levelFormatVersion)
	{
		//Returns an empty vector, because it will most likely fail to read the level format.
		return objects;
	}

  	while(counter < bufferSize)
	{
		loadCgf = true;
		//Get typeID
		ObjectType typeID;
		ParseObject(&buffer[counter], &typeID, sizeof(typeID));
		switch((int)typeID)
		{
			case ObjectType_LevelMetaData:
			{
				SmartPointer<ObjectTypeHeader> header = new LevelMetaData;
				ParseLevelMetaData(&buffer[counter], *(LevelMetaData*)header.Get(), counter);
				objects.push_back(header);
				break;
			}

			case ObjectType_SpawnPoint:
			{
				loadCgf = false;
				ObjectHeader* header = new ObjectHeader;
				ParseObject(&buffer[counter], *header, counter, loadCgf);

				SpawnPointAttributes* spawn = new SpawnPointAttributes;

				spawn->typeID = header->typeID;

				for(int i = 0; i < 3; i++)
				{
					spawn->position[i] = header->position[i];
				}

				delete header;
				//objects.push_back(header);
				objects.push_back(spawn);
				break;
			}

			//This is by design, static and dynamic is using the same converter. Do not add anything inbetween them. 
			//Unless they are changed to not be the same.
			case ObjectType_Static: case ObjectType_Dynamic:
			{
				//Get specialType.
				ObjectSpecialType specialType;
				ParseObject(&buffer[counter+4], &specialType, sizeof(typeID));

				switch(specialType)
				{
					//there is no difference when parsing these specialTypes.
					case ObjectSpecialType_CrystalShard:
					case ObjectSpecialType_CrystalFormation:
					case ObjectSpecialType_Spike:
					case ObjectSpecialType_SpikeBox:
					case ObjectSpecialType_RedExplosiveBox:
					case ObjectSpecialType_StandardBox:
					case ObjectSpecialType_Stone:
					case ObjectSpecialType_Building:
					{
						ObjectHeader* header = new ObjectHeader;
						ParseObject(&buffer[counter], *header, counter, loadCgf);
						objects.push_back(header);

						break;
					}

					case ObjectSpecialType_JumpPad:
					{
						JumpPadAttributes* header = new JumpPadAttributes;
						ParseObject(&buffer[counter], *header, counter, loadCgf);

						//Read the spec
						ParseObject(&buffer[counter], header->direction, 16);
						counter += 16;
						objects.push_back(header);

						break;
					}
		
					case ObjectSpecialType_Portal:
					{
						PortalAttributes* header = new PortalAttributes;
						ParseObject(&buffer[counter], *header, counter, loadCgf);

						ParseObject(&buffer[counter], header->destination, 12);
						counter += 12;
						objects.push_back(header);

						break;
					}
					
					case ObjectSpecialType_World:
					{
						WorldAttributes* header = new WorldAttributes;
						ParseObject(&buffer[counter], *header, counter, loadCgf);

						ParseObject(&buffer[counter], &header->worldSize, 8);
						counter += 8;
						objects.push_back(header);
						break;
					}

					case ObjectSpecialType_Sky:
					{
						loadCgf = false; 
						SkyAttributes* header = new SkyAttributes;
						ParseObject(&buffer[counter], *header, counter, loadCgf);

						ParseObject(&buffer[counter], &header->skySize, 4);
						counter += 4;
						objects.push_back(header);
						break;
					}

					default:
						//Couldn't find specialType
						break;
				}
				break;
			}
			
			case ObjectType_Light:
			{
				LightType lightType;

				//Get Light type
				ParseObject(&buffer[counter+4], &lightType, sizeof(lightType));

				//We only support PointLight for now.
				BasicLight* header = new BasicLight;
				ParseObject(&buffer[counter], header, sizeof(*header));
				counter += sizeof(*header);
				objects.push_back(header);
				/*switch(lightType)
				{
				case LightType_PointLight:
				{
					PointLight* header = new PointLight;
					ParseObject(&buffer[counter], header, sizeof(*header));
					counter += sizeof(*header);
					objects.push_back(header);
					break;
				}
				case LightType_DirectionalLight:
				{
					DirectionalLight* header = new DirectionalLight;
					ParseObject(&buffer[counter], header, sizeof(*header));
					counter += sizeof(*header);
					objects.push_back(header);
					break;
				}
				case LightType_SpotLight:
				{
					SpotLight* header = new SpotLight;
					ParseObject(&buffer[counter], header, sizeof(*header));
					counter += sizeof(*header);
					objects.push_back(header);
					break;
				}
				default:
					//Undefined LightType.
					break;
				}
				break;*/
			}
			default:
				//Couldn't find typeID. FAIL!!!!!!
				break;
		}
	}

	return objects;
}

//f<>r meta information om leveln.
LevelMetaData LevelParser::ParseHeader(std::wstring filename)
{
	int bufferSize = 0;
	int counter = 0;

	LevelMetaData levelHeader;
	levelHeader.typeID = ObjectType::ObjectType_Unknown;

	//Read entire level file.
	Loader loader;
	char* buffer = (char*)loader.LoadFile(filename.c_str(), bufferSize);

	//Read format version
	LevelLoaderInternal::FormatVersion levelFormatVersion;
	ParseObject(&buffer[counter], &levelFormatVersion, sizeof(formatVersion));
	counter += sizeof(levelFormatVersion);
	if(this->formatVersion != levelFormatVersion)
	{
		//Do something if it's not the same version

		//Returns an empty levelHeader with ObjectType_Unknown.
		//Because it will not be able to read another version of the level format.
		return levelHeader;
	}

	//Find the header in the returned string.
	while(counter < bufferSize)
	{
		ObjectType typeID;
		ParseObject(&buffer[counter], &typeID, sizeof(typeID));

		switch(typeID)
		{
		case ObjectType_LevelMetaData:
			ParseLevelMetaData(&buffer[counter], levelHeader, counter);
			return levelHeader;
			break;
		
			//This is by design, static and dynamic is using the same converter. Do not add anything inbetween them.
		case ObjectType_Static: case ObjectType_Dynamic:
		{
			ObjectHeader header;
			ParseObject(&buffer[counter], &header, counter);

			switch(header.specialTypeID)
			{
			case ObjectSpecialType_JumpPad:
				counter += sizeof(16);
				break;
			case ObjectSpecialType_Portal:
				counter += sizeof(12);
				break;
			default:
				break;
			}	
			break;
		}

		case ObjectType_Light:
		{
			LightType lightType;
			ParseObject(&buffer[counter+4], &lightType, sizeof(lightType));

			//We only support pointlight for now.
			counter += sizeof(BasicLight);
			/*
			switch(lightType)
			{
			case LightType_PointLight:
			{
				counter += sizeof(PointLight);
				break;
			}
			case LightType_DirectionalLight:
			{
				counter += sizeof(DirectionalLight);
				break;
			}
			case LightType_SpotLight:
			{
				counter += sizeof(SpotLight);
				break;
			}
			default:
				//Undefined LightType.
				break;
			}*/
		}

		default:
			//Couldn't find typeID. FAIL!!!!!!
			break;
		}
	}

	return levelHeader;
}