A language file manager for mods using MC Forge.

SAP_LanguageManager.java

package SanAndreasP.mods;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashMap;


import net.minecraft.client.Minecraft;
import net.minecraft.server.MinecraftServer;
import net.minecraft.src.Block;
import net.minecraft.src.Entity;
import net.minecraft.src.EntityList;
import net.minecraft.src.Item;
import net.minecraft.src.ItemStack;
import net.minecraft.src.StringTranslate;

import cpw.mods.fml.common.FMLCommonHandler;
import cpw.mods.fml.common.FMLLog;
import cpw.mods.fml.common.registry.LanguageRegistry;

public class SAP_LanguageManager {
	private HashMap<String, File> langFiles = new HashMap<String, File>();
	private File path;
	private String version, modname;
	
	public SAP_LanguageManager(String par1Path, String par2LangVer, String par3Mod) {
		try {
			String cfgpath = "minecraft/config/langs"+par1Path;
			path = getModDir(cfgpath);
			if(!(path.exists()))
				path.mkdirs();
		} catch(Throwable e) {
			e.printStackTrace();
		}
		
		File[] files = path.listFiles(new LangFileFilter());
		
		for(File langFile : files) {
			String lang = langFile.getName().replaceAll(".(txt|lang|SAPlang)", "");
			if(StringTranslate.getInstance().getLanguageList().containsKey(lang))
				langFiles.put(lang, langFile);
		}
		
		version = par2LangVer;
		modname = par3Mod;
	}
	
	private File getModDir(String par1Path) {
		if(FMLCommonHandler.instance().getSide().isClient())
			return Minecraft.getAppDir(par1Path);
		else
			return MinecraftServer.getServer().getFile(par1Path);
	}
	
	public void loadLangPropertyStr(String property, String defName) {
		LanguageRegistry.instance().addStringLocalization(property, "en_US", defName);
		boolean langRead = false;
		
		String[] langs = langFiles.keySet().toArray(new String[langFiles.size()]);
		for(String cLang : langs) {
			File cFile = langFiles.get(cLang);
			if(!cFile.canRead())
				continue;
			
			try {
				BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream(cFile), "UTF-8"));

				do {
					String s = in.readLine();
					
					if(s == null || s.isEmpty())
						continue;
					
					s = s.replaceAll("\uFEFF", "");
					
					if(s.matches("[ ]{0,}"+property+".*?=.*") ) {
						LanguageRegistry.instance().addStringLocalization(property, cLang, s.replaceAll(".*?=[ ]{0,}", ""));
						langRead = true;
						break;
					}
				} while(in.ready());
				in.close();
			} catch (FileNotFoundException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			}
			
			if(!langRead) {
				FMLLog.warning("Cannot find translated name for [%s] in %s lang file %s. pre-defined name is used.", property.replaceAll(".name", ""), modname, cLang);
			}
		}
	}
	
	public void loadLangProperty(Object obj, String defName) {
		String objectName;
		
		if(obj == null)
			throw new IllegalArgumentException(String.format("Illegal object for naming %s",obj));
		
		if (obj instanceof String) {
			objectName=(String)obj;
			this.loadLangPropertyStr(objectName, defName);
			return;
		} else if (obj instanceof Item) {
			objectName=((Item)obj).getItemName();
		} else if (obj instanceof Block) {
			objectName=((Block)obj).getBlockName();
		} else if (obj instanceof ItemStack) {
			objectName=((ItemStack)obj).getItem().getItemNameIS((ItemStack)obj);
		} else if (obj instanceof Class && (Entity.class.isAssignableFrom((Class)obj))){
			objectName="entity."+((String)EntityList.classToStringMapping.get((Class)obj));
		} else {
			throw new IllegalArgumentException(String.format("Illegal object for naming %s",obj));
		}
		objectName+=".name";
        
		this.loadLangPropertyStr(objectName, defName);
	}
}

class LangFileFilter implements FilenameFilter {

	@Override
	public boolean accept(File dir, String name) {
		if(name.endsWith(".txt") || name.endsWith(".SAPlang") || name.endsWith(".lang"))
			return true;
		else return false;
	}
	
}