CacheHelper.java

package vazkii.minetunes.config;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import net.minecraft.nbt.CompressedStreamTools;
import net.minecraft.nbt.NBTTagCompound;
import vazkii.minetunes.gui.GuiDevTools;
import vazkii.minetunes.lib.LibMisc;

public final class CacheHelper {

	public static File getCacheFile(String filename) throws IOException {
		File loc = new File(".");
		File cacheFile = new File(loc, LibMisc.MOD_ID + "/" + filename);

		if(!cacheFile.exists()) {
			cacheFile.getParentFile().mkdirs();
			cacheFile.createNewFile();
		}

		return cacheFile;
	}

	public static NBTTagCompound getCacheCompound(File file) {
		if(file == null)
			throw new RuntimeException("No cache file!");

		try {
			NBTTagCompound cmp = CompressedStreamTools.readCompressed(new FileInputStream(file));
			return cmp;
		} catch(IOException e) {
			NBTTagCompound cmp = new NBTTagCompound();

			try {
				CompressedStreamTools.writeCompressed(cmp, new FileOutputStream(file));
				return getCacheCompound(file);
			} catch (IOException e1) {
				GuiDevTools.logThrowable(e1);
				return null;
			}
		}
	}

	public static void injectNBTToFile(File file, NBTTagCompound cmp) {
		try {
			CompressedStreamTools.writeCompressed(cmp, new FileOutputStream(file));
		} catch(IOException e) {
			GuiDevTools.logThrowable(e);
		}
	}
	
}