Added world loading and other various improvements

WorldHandler.cpp

@@ -0,0 +1,129 @@
+#include "WorldHandler.h"
+#include "World.h"
+
+#include "json.h"
+#include <fstream>
+#include <iostream>
+#include <string>
+
+WorldHandler* WorldHandler::instance = nullptr;
+
+void WorldHandler::ChangeWorld(int i)
+{
+	if (i < 0)
+		i = worldfiles.size() - 1;
+
+	else if (i >= worldfiles.size())
+		i = 0;
+
+	if (i != worldIndex)
+	{
+		loadingWorld = true;
+
+		if(worldIndex != -1)
+			delete world;
+
+		world = new World(worldfiles[i]);
+		worldIndex = i;
+		loadingWorld = false;
+	}
+}
+
+WorldHandler::WorldHandler()
+{
+	loadingWorld = true;
+	worldIndex = -1;
+
+	//Find worlds.json
+	std::ifstream file("worlds/worlds.json");
+	if (!file.is_open())
+		std::cout << "Error, can't open worlds overview file\n";
+
+	json::Value v = json::readJson(file);
+	file.close();
+
+	//Load file names into vector
+	if (v["worlds"].isNull() || !v["worlds"].isArray())
+		std::cout << "Error, no content in worlds overview file\n";
+
+	for (auto line : v["worlds"])
+	{
+		std::cout << "Found world: " << line << "\n";
+		worldfiles.push_back(line);
+	}
+
+	if (worldfiles.size() > 0)
+	{
+		ChangeWorld(0);
+	}
+}
+
+WorldHandler::~WorldHandler()
+{
+	worldIndex = -1;
+	delete world;
+}
+
+WorldHandler* WorldHandler::getInstance()
+{
+	if (instance == nullptr)
+		instance = new WorldHandler();
+
+	return instance;
+}
+
+void WorldHandler::init()
+{
+	instance = new WorldHandler();
+}
+
+void WorldHandler::draw(void)
+{
+	if(!loadingWorld)
+		world->draw();
+	else
+	{
+		//Draw Loading screen
+	}
+}
+
+void WorldHandler::update(float deltaTime)
+{
+	if(!loadingWorld)
+		world->update(deltaTime);
+}
+
+bool WorldHandler::isPlayerPositionValid(void)
+{
+	if(!loadingWorld)
+		return world->isPlayerPositionValid();
+}
+
+
+void WorldHandler::Navigate(const std::string &fileName)
+{
+	if (!loadingWorld)
+	{
+		for (int i = 0; i < worldfiles.size(); i++)
+		{
+			if (worldfiles[i] == fileName)
+				ChangeWorld(i);
+		}
+	}
+}
+
+void WorldHandler::NextWorld()
+{
+	if (!loadingWorld)
+	{
+		ChangeWorld(worldIndex + 1);
+	}
+}
+
+void WorldHandler::PreviousWorld()
+{
+	if (!loadingWorld)
+	{
+		ChangeWorld(worldIndex - 1);
+	}
+}