world list and export/import buttons added to singleplayer

epkcompiler/readme.txt

@@ -1,3 +1,5 @@
+To quickly recompile the assets.epk file in /javascript, open 'run.bat' if you are on windows or open 'run_unix.sh' if you are on mac or linux
+
 Use this tool like this:
 
 java -jar CompilePackage.jar <source directory> <output file>

epkcompiler/run.bat

@@ -0,0 +1,3 @@
+@echo off
+java -jar CompilePackage.jar "../lwjgl-rundir/resources" "../javascript/assets.epk"
+pause

epkcompiler/run_unix.sh

@@ -0,0 +1,2 @@
+#!/bin/sh
+java -jar CompilePackage.jar "../lwjgl-rundir/resources" "../javascript/assets.epk"

lwjgl-rundir/resources/lang/en_US.lang

@@ -11,6 +11,7 @@ gui.up=Up
 gui.down=Down
 gui.yes=Yes
 gui.no=No
+gui.killTask=Kill Task
 
 menu.singleplayer=Singleplayer
 menu.multiplayer=Multiplayer
@@ -72,6 +73,9 @@ selectWorld.enterSeed=Seed for the World Generator
 selectWorld.seedInfo=Leave blank for a random seed
 selectWorld.cheats=Cheats
 selectWorld.customizeType=Customize
+selectWorld.duplicateTitle=Duplicate World
+selectWorld.duplicateButton=Duplicate
+selectWorld.importName=Set World Name
 
 selectWorld.backup.title=World Backup Menu:
 selectWorld.backup.recreate=Re-Create World
@@ -137,6 +141,17 @@ selectWorld.hardcoreMode=Hardcore:
 selectWorld.hardcoreMode.info=World is deleted upon death
 selectWorld.bonusItems=Bonus Chest:
 
+selectWorld.progress.deleting=Deleting World
+selectWorld.progress.renaming=Renaming World
+selectWorld.progress.copying=Copying World
+selectWorld.progress.exporting.1=Exporting as EPK
+selectWorld.progress.exporting.2=Exporting as Vanilla
+selectWorld.progress.importing.0=Importing as EPK
+selectWorld.progress.importing.1=Importing as Vanilla
+selectWorld.progress.cancelWarning=Do you really want to 'Kill Task'? Your world may fail to save
+selectWorld.progress.confirmCancel=Yes, Kill Task
+selectWorld.progress.continue=Continue
+
 generator.default=Default
 generator.flat=Superflat
 generator.largeBiomes=Large Biomes

sp-server/src/ipc/java/net/lax1dude/eaglercraft/sp/ipc/IPCPacket07ImportWorld.java

@@ -10,6 +10,10 @@ public class IPCPacket07ImportWorld implements IPCPacketBase {
 
 	public String worldName;
 	public byte[] worldData;
+	public byte worldFormat;
+	
+	public static final byte WORLD_FORMAT_EAG = 0x00;
+	public static final byte WORLD_FORMAT_MCA = 0x01;
 	
 	public IPCPacket07ImportWorld() {
 	}
@@ -17,12 +21,14 @@ public class IPCPacket07ImportWorld implements IPCPacketBase {
 	public IPCPacket07ImportWorld(String worldName, byte[] worldData, byte worldFormat) {
 		this.worldName = worldName;
 		this.worldData = worldData;
+		this.worldFormat = worldFormat;
 	}
 
 	@Override
 	public void deserialize(DataInput bin) throws IOException {
 		worldName = bin.readUTF();
 		worldData = new byte[bin.readInt()];
+		worldFormat = bin.readByte();
 		bin.readFully(worldData);
 	}
 
@@ -30,6 +36,7 @@ public class IPCPacket07ImportWorld implements IPCPacketBase {
 	public void serialize(DataOutput bin) throws IOException {
 		bin.writeUTF(worldName);
 		bin.writeInt(worldData.length);
+		bin.writeByte(worldFormat);
 		bin.write(worldData);
 	}
 

sp-server/src/ipc/java/net/lax1dude/eaglercraft/sp/ipc/IPCPacketFFProcessKeepAlive.java

@@ -9,6 +9,7 @@ public class IPCPacketFFProcessKeepAlive implements IPCPacketBase {
 	public static final int ID = 0xFF;
 
 	public static final int KEEPALIVE = 0;
+	public static final int FAILURE = 0xFE;
 	
 	public int ack;
 	

sp-server/src/main/java/net/lax1dude/eaglercraft/sp/EPKCompiler.java

@@ -0,0 +1,58 @@
+package net.lax1dude.eaglercraft.sp;
+
+import java.io.ByteArrayOutputStream;
+import java.io.DataOutputStream;
+import java.nio.charset.Charset;
+
+import com.jcraft.jzlib.Deflater;
+import com.jcraft.jzlib.DeflaterOutputStream;
+
+public class EPKCompiler {
+	
+	private final ByteArrayOutputStream osb = new ByteArrayOutputStream();
+	private DataOutputStream os;
+	private Deflater d;
+	private final SHA1Digest dig = new SHA1Digest();
+	
+	public EPKCompiler(String name) {
+		try {
+			d = new Deflater(9);
+			os = new DataOutputStream(osb);
+			os.write("EAGPKG!!".getBytes(Charset.forName("UTF-8")));
+			os.writeUTF("\n\n #  eaglercraft package file - " + name + "\n #  eagler eagler eagler eagler eagler eagler eagler\n\n");
+			d = new Deflater(9);
+			os = new DataOutputStream(new DeflaterOutputStream(osb, d));
+		}catch(Throwable t) {
+			throw new RuntimeException("this happened somehow", t);
+		}
+	}
+	
+	public void append(String name, byte[] dat) {
+		try {
+			os.writeUTF("<file>");
+			os.writeUTF(name);
+			byte[] v = dat;
+			dig.update(v, 0, v.length);
+			byte[] final_ = new byte[20];
+			dig.doFinal(final_, 0);
+			os.write(final_);
+			os.writeInt(v.length);
+			os.write(v);
+			os.writeUTF("</file>");
+		}catch(Throwable t) {
+			throw new RuntimeException("this happened somehow", t);
+		}
+	}
+	
+	public byte[] complete() {
+		try {
+			os.writeUTF(" end");
+			os.flush();
+			os.close();
+			return osb.toByteArray();
+		}catch(Throwable t) {
+			throw new RuntimeException("this happened somehow", t);
+		}
+	}
+	
+}

sp-server/src/main/java/net/lax1dude/eaglercraft/sp/EPKDecompiler.java

@@ -0,0 +1,61 @@
+package net.lax1dude.eaglercraft.sp;
+
+import java.io.ByteArrayInputStream;
+import java.io.DataInputStream;
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.util.Arrays;
+
+import com.jcraft.jzlib.InflaterInputStream;
+
+public class EPKDecompiler {
+	
+	public static class FileEntry {
+		public final String name;
+		public final byte[] data;
+		protected FileEntry(String name, byte[] data) {
+			this.name = name;
+			this.data = data;
+		}
+	}
+	
+	private final ByteArrayInputStream in2;
+	private DataInputStream in;
+	private SHA1Digest dg = new SHA1Digest();
+	private boolean isFinished = false;
+	
+	public EPKDecompiler(byte[] data) throws IOException {
+		in2 = new ByteArrayInputStream(data);
+		in = new DataInputStream(in2);
+		byte[] header = new byte[8];
+		in.read(header);
+		if(!"EAGPKG!!".equals(new String(header, Charset.forName("UTF-8")))) throw new IOException("invalid epk file");
+		in.readUTF();
+		in = new DataInputStream(new InflaterInputStream(in2));
+	}
+	
+	public FileEntry readFile() throws IOException {
+		if(isFinished) {
+			return null;
+		}
+		String s = in.readUTF();
+		if(s.equals(" end")) {
+			isFinished = true;
+			return null;
+		}else if(!s.equals("<file>")) {
+			throw new IOException("invalid epk file");
+		}
+		String path = in.readUTF();
+		byte[] digest = new byte[20];
+		byte[] digest2 = new byte[20];
+		in.read(digest);
+		int len = in.readInt();
+		byte[] file = new byte[len];
+		in.read(file);
+		dg.update(file, 0, len); dg.doFinal(digest2, 0);
+		if(!Arrays.equals(digest, digest2)) throw new IOException("invalid file hash for "+path);
+		if(!"</file>".equals(in.readUTF())) throw new IOException("invalid epk file");
+		return new FileEntry(path, file);
+	}
+	
+}

sp-server/src/main/java/net/lax1dude/eaglercraft/sp/IntegratedServer.java

@@ -88,6 +88,10 @@ public class IntegratedServer {
 		}
 	}
 	
+	public static void updateStatusString(String stat, float prog) {
+		sendIPCPacket(new IPCPacket0DProgressUpdate(stat, prog));
+	}
+	
 	private static boolean isServerStopped() {
 		return currentProcess == null || !currentProcess.isServerRunning();
 	}
@@ -104,6 +108,10 @@ public class IntegratedServer {
 		sendIPCPacket(new IPCPacket15ThrowException(str, arr));
 	}
 	
+	public static void sendTaskFailed() {
+		sendIPCPacket(new IPCPacketFFProcessKeepAlive(IPCPacketFFProcessKeepAlive.FAILURE));
+	}
+	
 	private static void processAsyncMessageQueue() {
 		ArrayList<PKT> cur;
 		synchronized(messageQueue) {
@@ -207,8 +215,20 @@ public class IntegratedServer {
 					case IPCPacket03DeleteWorld.ID: {
 							tryStopServer();
 							IPCPacket03DeleteWorld pkt = (IPCPacket03DeleteWorld)packet;
-							if(SYS.VFS.deleteFiles("worlds/" + pkt.worldName) <= 0) {
+							if(SYS.VFS.deleteFiles("worlds/" + pkt.worldName + "/") <= 0) {
 								throwExceptionToClient("Failed to delete world!", new RuntimeException("VFS did not delete directory 'worlds/" + pkt.worldName + "' correctly"));
+								sendTaskFailed();
+								break;
+							}
+							String[] worldsTxt = SYS.VFS.getFile("worlds.txt").getAllLines();
+							if(worldsTxt != null) {
+								LinkedList<String> newWorlds = new LinkedList();
+								for(String str : worldsTxt) {
+									if(!str.equalsIgnoreCase(pkt.worldName)) {
+										newWorlds.add(str);
+									}
+								}
+								SYS.VFS.getFile("worlds.txt").setAllChars(String.join("\n", newWorlds));
 							}
 							sendIPCPacket(new IPCPacketFFProcessKeepAlive(IPCPacket03DeleteWorld.ID));
 						}
@@ -216,23 +236,63 @@ public class IntegratedServer {
 					case IPCPacket04RenameWorld.ID: {
 							tryStopServer();
 							IPCPacket04RenameWorld pkt = (IPCPacket04RenameWorld)packet;
-							if(SYS.VFS.renameFiles("worlds/" + pkt.worldOldName, "worlds/" + pkt.worldNewName, pkt.copy) <= 0) {
+							if(SYS.VFS.renameFiles("worlds/" + pkt.worldOldName + "/", "worlds/" + pkt.worldNewName + "/", pkt.copy) <= 0) {
 								throwExceptionToClient("Failed to copy/rename server!", new RuntimeException("VFS did not copy/rename directory 'worlds/" + pkt.worldOldName + "' correctly"));
+								sendTaskFailed();
+								break;
 							}else {
+								String[] worldsTxt = SYS.VFS.getFile("worlds.txt").getAllLines();
+								LinkedList<String> newWorlds = new LinkedList();
+								if(worldsTxt != null) {
+									for(String str : worldsTxt) {
+										if(pkt.copy || !str.equalsIgnoreCase(pkt.worldOldName)) {
+											newWorlds.add(str);
+										}
+									}
+								}
+								newWorlds.add(pkt.worldNewName);
+								SYS.VFS.getFile("worlds.txt").setAllChars(String.join("\n", newWorlds));
 								VFile worldDat = new VFile("worlds", pkt.worldNewName, "level.dat");
 								if(worldDat.canRead()) {
 									NBTTagCompound worldDatNBT = CompressedStreamTools.decompress(worldDat.getAllBytes());
-									worldDatNBT.setString("LevelName", pkt.displayName);
+									worldDatNBT.getCompoundTag("Data").setString("LevelName", pkt.displayName);
 									worldDat.setAllBytes(CompressedStreamTools.compress(worldDatNBT));
 								}else {
 									throwExceptionToClient("Failed to copy/rename world!", new RuntimeException("Failed to change level.dat world '" + pkt.worldNewName + "' display name to '" + pkt.displayName + "' because level.dat was missing"));
+									sendTaskFailed();
+									break;
 								}
 							}
 							sendIPCPacket(new IPCPacketFFProcessKeepAlive(IPCPacket04RenameWorld.ID));
 						}
 						break;
-					case IPCPacket05RequestData.ID:
-						
+					case IPCPacket05RequestData.ID: {
+							IPCPacket05RequestData pkt = (IPCPacket05RequestData)packet;
+							if(pkt.request == IPCPacket05RequestData.REQUEST_LEVEL_EAG) {
+								try {
+									final int[] bytesWritten = new int[1];
+									final int[] lastUpdate = new int[1];
+									String pfx = "worlds/" + pkt.worldName + "/";
+									EPKCompiler c = new EPKCompiler("contains backup of world '" + pkt.worldName + "'");
+									SYS.VFS.iterateFiles(pfx, false, (i) -> {
+										byte[] b = i.getAllBytes();
+										c.append(i.path.substring(pfx.length()), b);
+										bytesWritten[0] += b.length;
+										if(bytesWritten[0] - lastUpdate[0] > 10000) {
+											lastUpdate[0] = bytesWritten[0];
+											updateStatusString("selectWorld.progress.exporting." + pkt.request, bytesWritten[0]);
+										}
+									});
+									sendIPCPacket(new IPCPacket09RequestResponse(c.complete()));
+								}catch(Throwable t) {
+									throwExceptionToClient("Failed to export world '" + pkt.worldName + "' as EPK", t);
+									sendTaskFailed();
+								}
+							}else {
+								System.err.println("Unknown IPCPacket05RequestData type '" + pkt.request + "'");
+								sendTaskFailed();
+							}
+						}
 						break;
 					case IPCPacket06RenameWorldNBT.ID: {
 							IPCPacket06RenameWorldNBT pkt = (IPCPacket06RenameWorldNBT)packet;
@@ -240,18 +300,63 @@ public class IntegratedServer {
 								VFile worldDat = new VFile("worlds", pkt.worldName, "level.dat");
 								if(worldDat.canRead()) {
 									NBTTagCompound worldDatNBT = CompressedStreamTools.decompress(worldDat.getAllBytes());
-									worldDatNBT.setString("LevelName", pkt.displayName);
+									worldDatNBT.getCompoundTag("Data").setString("LevelName", pkt.displayName);
 									worldDat.setAllBytes(CompressedStreamTools.compress(worldDatNBT));
 								}else {
 									throwExceptionToClient("Failed to rename world!", new RuntimeException("Failed to change level.dat world '" + pkt.worldName + "' display name to '" + pkt.displayName + "' because level.dat was missing"));
 								}
 							}else {
 								System.err.println("Client tried to rename a world '" + pkt.worldName + "' to have name '" + pkt.displayName + "' while the server is running");
+								sendTaskFailed();
 							}
 						}
 						break;
-					case IPCPacket07ImportWorld.ID:
-						
+					case IPCPacket07ImportWorld.ID: {
+							IPCPacket07ImportWorld pkt = (IPCPacket07ImportWorld)packet;
+							if(pkt.worldFormat == IPCPacket07ImportWorld.WORLD_FORMAT_EAG) {
+								try {
+									String folder = VFSSaveHandler.worldNameToFolderName(pkt.worldName);
+									VFile dir = new VFile("worlds", folder);
+									EPKDecompiler dc = new EPKDecompiler(pkt.worldData);
+									EPKDecompiler.FileEntry f = null;
+									int lastProgUpdate = 0;
+									int prog = 0;
+									while((f = dc.readFile()) != null) {
+										byte[] b = f.data;
+										if(f.name.equals("level.dat")) {
+											NBTTagCompound worldDatNBT = CompressedStreamTools.decompress(b);
+											worldDatNBT.getCompoundTag("Data").setString("LevelName", pkt.worldName);
+											worldDatNBT.getCompoundTag("Data").setLong("LastPlayed", System.currentTimeMillis());
+											b = CompressedStreamTools.compress(worldDatNBT);
+										}
+										VFile ff = new VFile(dir, f.name);
+										ff.setAllBytes(b);
+										prog += b.length;
+										if(prog - lastProgUpdate > 10000) {
+											lastProgUpdate = prog;
+											updateStatusString("selectWorld.progress.importing." + pkt.worldFormat, prog);
+										}
+									}
+									String[] worldsTxt = SYS.VFS.getFile("worlds.txt").getAllLines();
+									if(worldsTxt == null || worldsTxt.length <= 0) {
+										worldsTxt = new String[] { folder };
+									}else {
+										String[] tmp = worldsTxt;
+										worldsTxt = new String[worldsTxt.length + 1];
+										System.arraycopy(tmp, 0, worldsTxt, 0, tmp.length);
+										worldsTxt[worldsTxt.length - 1] = folder;
+									}
+									SYS.VFS.getFile("worlds.txt").setAllChars(String.join("\n", worldsTxt));
+									sendIPCPacket(new IPCPacketFFProcessKeepAlive(IPCPacket07ImportWorld.ID));
+								}catch(Throwable t) {
+									throwExceptionToClient("Failed to import world '" + pkt.worldName + "' as EPK", t);
+									sendTaskFailed();
+								}
+							}else {
+								System.err.println("Client tried to import a world '" + pkt.worldName + "' while the server is running");
+								sendTaskFailed();
+							}
+						}
 						break;
 					case IPCPacket09RequestResponse.ID:
 						
@@ -262,6 +367,7 @@ public class IntegratedServer {
 								currentProcess.setDifficultyForAllWorlds(pkt.difficulty);
 							}else {
 								System.err.println("Client tried to set difficulty '" + pkt.difficulty + "' while server was stopped");
+								sendTaskFailed();
 							}
 						}
 						break;
@@ -279,6 +385,7 @@ public class IntegratedServer {
 								sendIPCPacket(new IPCPacketFFProcessKeepAlive(IPCPacket0BPause.ID));
 							}else {
 								System.err.println("Client tried to " + (pkt.pause ? "pause" : "unpause") + " while server was stopped");
+								sendTaskFailed();
 							}
 						}
 						break;
@@ -314,29 +421,25 @@ public class IntegratedServer {
 								LinkedList<NBTTagCompound> sendListNBT = new LinkedList();
 								boolean rewrite = false;
 								for(String w : worlds) {
-									VFile lvl = new VFile("worlds", w, "level.dat");
-									if(!lvl.canRead()) {
-										rewrite = true;
-										System.err.println("World level.dat for '" + w + "' was not found, attempting to delete 'worlds/" + w + "/*'");
-										if(SYS.VFS.deleteFiles("worlds/" + w) <= 0) {
-											System.err.println("No files were deleted in 'worlds/" + w + "/*', this may be corruption but '" + w + "' will still be removed from worlds.txt");
-										}
-									}else {
+									byte[] dat = (new VFile("worlds", w, "level.dat")).getAllBytes();
+									if(dat != null) {
 										NBTTagCompound worldDatNBT;
 										try {
-											worldDatNBT = CompressedStreamTools.decompress(lvl.getAllBytes());
+											worldDatNBT = CompressedStreamTools.decompress(dat);
 											worldDatNBT.setString("folderName", w);
 											sendListNBT.add(worldDatNBT);
 											updatedList.add(w);
+											continue;
 										}catch(IOException e) {
-											rewrite = true;
-											System.err.println("World level.dat for '" + w + "' was corrupt, attempting to delete 'worlds/" + w + "/*'");
-											if(SYS.VFS.deleteFiles("worlds/" + w) <= 0) {
-												System.err.println("No files were deleted in 'worlds/" + w + "/*', this may be corruption but '" + w + "' will still be removed from worlds.txt");
-											}
+											// shit fuck
 										}
 										
 									}
+									rewrite = true;
+									System.err.println("World level.dat for '" + w + "' was not found, attempting to delete 'worlds/" + w + "/*'");
+									if(SYS.VFS.deleteFiles("worlds/" + w) <= 0) {
+										System.err.println("No files were deleted in 'worlds/" + w + "/*', this may be corruption but '" + w + "' will still be removed from worlds.txt");
+									}
 								}
 								if(rewrite) {
 									SYS.VFS.getFile("worlds.txt").setAllChars(String.join("\n", updatedList));
@@ -344,6 +447,7 @@ public class IntegratedServer {
 								sendIPCPacket(new IPCPacket16NBTList(IPCPacket16NBTList.WORLD_LIST, sendListNBT));
 							}else {
 								System.err.println("Client tried to list worlds while server was running");
+								sendTaskFailed();
 							}
 						}
 						break;
@@ -377,11 +481,14 @@ public class IntegratedServer {
 						break;
 					default:
 						System.err.println("IPC packet type 0x" + Integer.toHexString(id) + " class '" + packet.getClass().getSimpleName() + "' was not handled");
+						sendTaskFailed();
 						break;
 					}
 				}catch(Throwable t) {
-					System.err.println("IPC packet 0x" + Integer.toHexString(id) + " class '" + packet.getClass().getSimpleName() + "' was not processed correctly");
-					t.printStackTrace();
+					String str = "IPC packet 0x" + Integer.toHexString(id) + " class '" + packet.getClass().getSimpleName() + "' was not processed correctly";
+					System.err.println(str);
+					throwExceptionToClient(str, t);
+					sendTaskFailed();
 				}
 				
 				continue;

sp-server/src/main/java/net/lax1dude/eaglercraft/sp/VFSSaveHandler.java

@@ -2,6 +2,7 @@ package net.lax1dude.eaglercraft.sp;
 
 import java.io.IOException;
 import java.util.HashMap;
+import java.util.List;
 
 import net.minecraft.src.CompressedStreamTools;
 import net.minecraft.src.EntityPlayer;
@@ -154,5 +155,19 @@ public class VFSSaveHandler implements ISaveHandler, IPlayerFileData {
 	public String[] getAvailablePlayerDat() {
 		return null;
 	}
+	
+	public static String worldNameToFolderName(String par1Str) {
+		par1Str = par1Str.replaceAll("[\\./\"]", "_");
+		
+		boolean shit = true;
+		while(shit) {
+			shit = (new VFile("worlds", par1Str, "level.dat")).exists();
+			if(shit) {
+				par1Str = par1Str + "_";
+			}
+		}
+
+		return par1Str;
+	}
 
 }

sp-server/src/main/java/net/lax1dude/eaglercraft/sp/VirtualFilesystem.java

@@ -280,15 +280,17 @@ public class VirtualFilesystem {
 					if(!AsyncHandlers.writeWholeFile(virtualFilesystem.indexeddb, newName, arr).bool) {
 						return false;
 					}
-					if(!AsyncHandlers.deleteFile(virtualFilesystem.indexeddb, filePath).bool) {
+					if(!copy && !AsyncHandlers.deleteFile(virtualFilesystem.indexeddb, filePath).bool) {
 						return false;
 					}
 				}else {
 					exists = false;
 				}
-				virtualFilesystem.fileMap.remove(filePath);
-				filePath = newName;
-				virtualFilesystem.fileMap.put(newName, this);
+				if(!copy) {
+					virtualFilesystem.fileMap.remove(filePath);
+					filePath = newName;
+					virtualFilesystem.fileMap.put(newName, this);
+				}
 				return true;
 			}
 			return false;
@@ -557,7 +559,7 @@ public class VirtualFilesystem {
 				@Override
 				public void handleEvent() {
 					IDBCursor c = r.getResult();
-					if(c == null || c.getKey() == null) {
+					if(c == null || c.getKey() == null || c.getValue() == null) {
 						cb.complete(res[0]);
 						return;
 					}
@@ -569,6 +571,7 @@ public class VirtualFilesystem {
 								itr.next(VIteratorFile.create(ci, vfs, c));
 							}catch(VFSIterator.BreakLoop ex) {
 								cb.complete(res[0]);
+								return;
 							}
 						}
 					}
@@ -594,7 +597,7 @@ public class VirtualFilesystem {
 				@Override
 				public void handleEvent() {
 					IDBCursor c = r.getResult();
-					if(c == null || c.getKey() == null) {
+					if(c == null || c.getKey() == null || c.getValue() == null) {
 						cb.complete(res[0]);
 						return;
 					}

sp-server/src/main/java/net/minecraft/server/MinecraftServer.java

@@ -148,8 +148,15 @@ public abstract class MinecraftServer implements ICommandSender, Runnable {
 	/**
 	 * Typically "menu.convertingLevel", "menu.loadingLevel" or others.
 	 */
-	protected synchronized void setUserMessage(String par1Str) {
+	protected void setUserMessage(String par1Str) {
 		IntegratedServer.sendIPCPacket(new IPCPacket0DProgressUpdate(par1Str, 0.0f));
+		this.logInfo(par1Str);
+		this.userMessage = par1Str;
+	}
+	
+	protected void setUserMessage(String par1Str, float prog) {
+		IntegratedServer.sendIPCPacket(new IPCPacket0DProgressUpdate(par1Str, prog));
+		this.logInfo(par1Str + ": " + (prog > 1.0f ? "" + (int)prog : "" + (int)(prog * 100.0f) + "%"));
 		this.userMessage = par1Str;
 	}
 
@@ -195,26 +202,27 @@ public abstract class MinecraftServer implements ICommandSender, Runnable {
 		}
 
 		this.setDifficultyForAllWorlds(this.getDifficulty());
+		this.setGameType(var8.getGameType());
 		this.initialWorldChunkLoad();
 	}
 
 	protected void initialWorldChunkLoad() {
 		int var5 = 0;
-		this.setUserMessage("menu.generatingTerrain");
+		//this.setUserMessage("menu.generatingTerrain");
 		byte var6 = 0;
-		this.getLogAgent().func_98233_a("Preparing start region for level " + var6);
+		this.setUserMessage("Preparing start region for level " + var6);
 		WorldServer var7 = this.worldServers[var6];
 		ChunkCoordinates var8 = var7.getSpawnPoint();
 		long var9 = System.currentTimeMillis();
 		
-		int prepareRadius = 48;
+		int prepareRadius = 64;
 
 		for (int var11 = -prepareRadius; var11 <= prepareRadius && this.isServerRunning(); var11 += 16) {
 			for (int var12 = -prepareRadius; var12 <= prepareRadius && this.isServerRunning(); var12 += 16) {
 				long var13 = System.currentTimeMillis();
 
 				if (var13 - var9 > 1000L) {
-					this.outputPercentRemaining("Preparing spawn area", var5 * 100 / 625);
+					setUserMessage("Preparing spawn area", Math.min(var5 / 64.0f, 0.99f));
 					var9 = var13;
 				}
 
@@ -247,7 +255,7 @@ public abstract class MinecraftServer implements ICommandSender, Runnable {
 	protected void outputPercentRemaining(String par1Str, int par2) {
 		this.currentTask = par1Str;
 		this.percentDone = par2;
-		this.getLogAgent().func_98233_a(par1Str + ": " + par2 + "%");
+		setUserMessage(par1Str, (par2 / 100.0f));
 	}
 
 	/**
@@ -270,10 +278,7 @@ public abstract class MinecraftServer implements ICommandSender, Runnable {
 				WorldServer var5 = var2[var4];
 
 				if (var5 != null) {
-					if (!par1) {
-						this.getLogAgent().func_98233_a("Saving chunks for level \'"
-								+ var5.getWorldInfo().getWorldName() + "\'/" + var5.provider.getDimensionName());
-					}
+					setUserMessage("Saving chunks for level \'" + var5.getWorldInfo().getWorldName() + "\'/" + var5.provider.getDimensionName());
 
 					try {
 						var5.saveAllChunks(true, (IProgressUpdate) null);
@@ -290,7 +295,7 @@ public abstract class MinecraftServer implements ICommandSender, Runnable {
 	 */
 	public void stopServer() {
 		if (!this.worldIsBeingDeleted) {
-			this.getLogAgent().func_98233_a("Stopping server");
+			setUserMessage("Stopping server");
 
 			if (this.getNetworkThread() != null) {
 				this.getNetworkThread().stopListening();
@@ -302,7 +307,7 @@ public abstract class MinecraftServer implements ICommandSender, Runnable {
 				this.serverConfigManager.removeAllPlayers();
 			}
 
-			this.getLogAgent().func_98233_a("Saving worlds");
+			setUserMessage("Saving worlds");
 			this.saveAllWorlds(false);
 
 			for (int var1 = 0; var1 < this.worldServers.length; ++var1) {

sp-server/src/main/java/net/minecraft/src/ItemMap.java

@@ -8,7 +8,7 @@ public class ItemMap extends ItemMapBase {
 
 	public MapData getMapData(ItemStack par1ItemStack, World par2World) {
 		String var3 = "map_" + par1ItemStack.getItemDamage();
-		MapData var4 = (MapData) par2World.loadItemData(MapData.class, var3);
+		MapData var4 = (MapData) par2World.loadItemData((s) -> new MapData(s), var3);
 
 		if (var4 == null && !par2World.isRemote) {
 			par1ItemStack.setItemDamage(par2World.getUniqueDataId("map"));

sp-server/src/main/java/net/minecraft/src/MapStorage.java

@@ -8,6 +8,7 @@ import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
+import java.util.function.Function;
 
 import net.lax1dude.eaglercraft.sp.VFile;
 
@@ -36,7 +37,7 @@ public class MapStorage {
 	 * instantiating the given Class, or returns null if none such file exists.
 	 * args: Class to instantiate, String dataid
 	 */
-	public WorldSavedData loadData(Class par1Class, String par2Str) {
+	public WorldSavedData loadData(Function<String, WorldSavedData> par1Class, String par2Str) {
 		WorldSavedData var3 = (WorldSavedData) this.loadedDataMap.get(par2Str);
 
 		if (var3 != null) {
@@ -48,8 +49,7 @@ public class MapStorage {
 
 					if (var4 != null && var4.exists()) {
 						try {
-							var3 = (WorldSavedData) par1Class.getConstructor(new Class[] { String.class })
-									.newInstance(new Object[] { par2Str });
+							var3 = (WorldSavedData) par1Class.apply(par2Str);
 						} catch (Exception var7) {
 							throw new RuntimeException("Failed to instantiate " + par1Class.toString(), var7);
 						}

sp-server/src/main/java/net/minecraft/src/World.java

@@ -7,6 +7,7 @@ import java.util.HashSet;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Set;
+import java.util.function.Function;
 
 import net.lax1dude.eaglercraft.sp.EaglercraftRandom;
 
@@ -177,15 +178,15 @@ public abstract class World implements IBlockAccess {
 			this.worldInfo.setServerInitialized(true);
 		}
 
-		//VillageCollection var7 = (VillageCollection) this.mapStorage.loadData(VillageCollection.class, "villages");
+		VillageCollection var7 = (VillageCollection) this.mapStorage.loadData((s) -> new VillageCollection(s), "villages");
 
-		//if (var7 == null) {
+		if (var7 == null) {
 			this.villageCollectionObj = new VillageCollection(this);
 			this.mapStorage.setData("villages", this.villageCollectionObj);
-		//} else {
-		//	this.villageCollectionObj = var7;
-		//	this.villageCollectionObj.func_82566_a(this);
-		//}
+		} else {
+			this.villageCollectionObj = var7;
+			this.villageCollectionObj.func_82566_a(this);
+		}
 
 		this.calculateInitialSkylight();
 		this.calculateInitialWeather();
@@ -3056,7 +3057,7 @@ public abstract class World implements IBlockAccess {
 	 * using the MapStorage, instantiating the given Class, or returns null if none
 	 * such file exists. args: Class to instantiate, String dataid
 	 */
-	public WorldSavedData loadItemData(Class par1Class, String par2Str) {
+	public WorldSavedData loadItemData(Function<String, WorldSavedData> par1Class, String par2Str) {
 		return this.mapStorage.loadData(par1Class, par2Str);
 	}
 

sp-server/src/main/java/net/minecraft/src/WorldServer.java

@@ -78,7 +78,7 @@ public class WorldServer extends World {
 
 		this.field_85177_Q = new Teleporter(this);
 		this.worldScoreboard = new ServerScoreboard(par1MinecraftServer);
-		ScoreboardSaveData var8 = (ScoreboardSaveData) this.mapStorage.loadData(ScoreboardSaveData.class, "scoreboard");
+		ScoreboardSaveData var8 = (ScoreboardSaveData) this.mapStorage.loadData((s) -> new ScoreboardSaveData(s), "scoreboard");
 
 		if (var8 == null) {
 			var8 = new ScoreboardSaveData();

src/lwjgl/java/net/lax1dude/eaglercraft/adapter/EaglerAdapterImpl2.java

@@ -1010,6 +1010,9 @@ public class EaglerAdapterImpl2 {
 			
 		});
 	}
+	public static final boolean getFileChooserResultAvailable() {
+		return fileChooserFile != null;
+	}
 	public static final byte[] getFileChooserResult() {
 		byte[] b = fileChooserFile;
 		fileChooserFile = null;
@@ -1208,4 +1211,8 @@ public class EaglerAdapterImpl2 {
 		throw new UnsupportedOperationException("Integrated server is not available in LWJGL eagleradapter");
 	}
 	
+	public static final void downloadBytes(String str, byte[] dat) {
+		JOptionPane.showMessageDialog(null, "downloadBytes was called for file '" + str + "' with " + dat.length + " bytes");
+	}
+	
 }

src/main/java/net/lax1dude/eaglercraft/ConfigConstants.java

@@ -4,7 +4,7 @@ public class ConfigConstants {
 	
 	public static boolean profanity = false;
 
-	public static final String version = "22w04b";
+	public static final String version = "singleplayer snapshot";
 	public static final String mainMenuString = "eaglercraft " + version;
 	
 	public static final String forkMe = "https://github.com/LAX1DUDE/eaglercraft";

src/main/java/net/lax1dude/eaglercraft/GuiNameWorldImport.java

@@ -0,0 +1,122 @@
+package net.lax1dude.eaglercraft;
+
+import net.minecraft.src.GuiButton;
+import net.minecraft.src.GuiCreateWorld;
+import net.minecraft.src.GuiScreen;
+import net.minecraft.src.GuiTextField;
+import net.minecraft.src.StringTranslate;
+
+public class GuiNameWorldImport extends GuiScreen {
+	private GuiScreen parentGuiScreen;
+	private GuiTextField theGuiTextField;
+	private int importFormat;
+	private String name;
+	private String oldName;
+	private boolean timeToImport = false;
+	private boolean definetlyTimeToImport = false;
+	private boolean isImporting = false;
+	
+	public GuiNameWorldImport(GuiScreen menu, String name, int format) {
+		this.parentGuiScreen = menu;
+		this.importFormat = format;
+		this.oldName = name;
+		if(name.length() > 4 && name.endsWith(".epk")) {
+			name = name.substring(0, name.length() - 4);
+		}
+		this.name = name;
+	}
+
+	/**
+	 * Called from the main game loop to update the screen.
+	 */
+	public void updateScreen() {
+		if(!timeToImport) {
+			this.theGuiTextField.updateCursorCounter();
+		}
+		if(definetlyTimeToImport && !isImporting) {
+			isImporting = true;
+			IntegratedServer.importWorld(GuiCreateWorld.makeUsableName(this.theGuiTextField.getText().trim()), EaglerAdapter.getFileChooserResult(), importFormat);
+			mc.displayGuiScreen(new GuiScreenSingleplayerLoading(parentGuiScreen, "selectWorld.progress.importing." + importFormat, () -> IntegratedServer.isReady()));
+		}
+	}
+
+	/**
+	 * Adds the buttons (and other controls) to the screen in question.
+	 */
+	public void initGui() {
+		if(!timeToImport) {
+			StringTranslate var1 = StringTranslate.getInstance();
+			EaglerAdapter.enableRepeatEvents(true);
+			this.buttonList.clear();
+			this.buttonList.add(new GuiButton(0, this.width / 2 - 100, this.height / 4 + 96 + 12, var1.translateKey("selectWorld.progress.continue")));
+			this.buttonList.add(new GuiButton(1, this.width / 2 - 100, this.height / 4 + 120 + 12, var1.translateKey("gui.cancel")));
+			this.theGuiTextField = new GuiTextField(this.fontRenderer, this.width / 2 - 100, this.height / 4 + 3, 200, 20);
+			this.theGuiTextField.setFocused(true);
+			this.theGuiTextField.setText(name);
+		}
+	}
+
+	/**
+	 * Called when the screen is unloaded. Used to disable keyboard repeat events
+	 */
+	public void onGuiClosed() {
+		EaglerAdapter.enableRepeatEvents(false);
+	}
+
+	/**
+	 * Fired when a control is clicked. This is the equivalent of
+	 * ActionListener.actionPerformed(ActionEvent e).
+	 */
+	protected void actionPerformed(GuiButton par1GuiButton) {
+		if (par1GuiButton.enabled) {
+			if (par1GuiButton.id == 1) {
+				this.mc.displayGuiScreen(this.parentGuiScreen);
+			} else if (par1GuiButton.id == 0) {
+				this.buttonList.clear();
+				timeToImport = true;
+			}
+		}
+	}
+
+	/**
+	 * Fired when a key is typed. This is the equivalent of
+	 * KeyListener.keyTyped(KeyEvent e).
+	 */
+	protected void keyTyped(char par1, int par2) {
+		this.theGuiTextField.textboxKeyTyped(par1, par2);
+		((GuiButton) this.buttonList.get(0)).enabled = this.theGuiTextField.getText().trim().length() > 0;
+
+		if (par1 == 13) {
+			this.actionPerformed((GuiButton) this.buttonList.get(0));
+		}
+	}
+
+	/**
+	 * Called when the mouse is clicked.
+	 */
+	protected void mouseClicked(int par1, int par2, int par3) {
+		super.mouseClicked(par1, par2, par3);
+		if(!timeToImport) {
+			this.theGuiTextField.mouseClicked(par1, par2, par3);
+		}
+	}
+
+	/**
+	 * Draws the screen and all the components in it.
+	 */
+	public void drawScreen(int par1, int par2, float par3) {
+		this.drawDefaultBackground();
+		if(!timeToImport) {
+			StringTranslate var4 = StringTranslate.getInstance();
+			this.drawCenteredString(this.fontRenderer, var4.translateKey("selectWorld.importName"), this.width / 2, this.height / 4 - 60 + 20, 16777215);
+			this.drawString(this.fontRenderer, var4.translateKey("selectWorld.enterName"), this.width / 2 - 100, this.height / 4 - 60 + 50, 10526880);
+			this.theGuiTextField.drawTextBox();
+		}else {
+			definetlyTimeToImport = true;
+			long dots = (System.currentTimeMillis() / 500l) % 4l;
+			String str = "Reading: '" + oldName + "'";
+			this.drawString(fontRenderer, str + (dots > 0 ? "." : "") + (dots > 1 ? "." : "") + (dots > 2 ? "." : ""), (this.width - this.fontRenderer.getStringWidth(str)) / 2, this.height / 3 + 10, 0xFFFFFF);
+		}
+		super.drawScreen(par1, par2, par3);
+	}
+}

src/main/java/net/lax1dude/eaglercraft/GuiScreenBackupWorld.java

@@ -1,8 +1,13 @@
 package net.lax1dude.eaglercraft;
 
+import net.lax1dude.eaglercraft.sp.ipc.IPCPacket05RequestData;
 import net.minecraft.src.GuiButton;
+import net.minecraft.src.GuiCreateWorld;
+import net.minecraft.src.GuiRenameWorld;
 import net.minecraft.src.GuiScreen;
+import net.minecraft.src.NBTTagCompound;
 import net.minecraft.src.StringTranslate;
+import net.minecraft.src.WorldInfo;
 
 public class GuiScreenBackupWorld extends GuiScreen {
 
@@ -13,13 +18,15 @@ public class GuiScreenBackupWorld extends GuiScreen {
 	private GuiButton worldExport = null;
 	private GuiButton worldConvert = null;
 	private long worldSeed;
+	private NBTTagCompound levelDat;
 	
 	private String worldName;
 	
-	public GuiScreenBackupWorld(GuiScreen selectWorld, String worldName, long worldSeed) {
+	public GuiScreenBackupWorld(GuiScreen selectWorld, String worldName, NBTTagCompound levelDat) {
 		this.selectWorld = selectWorld;
 		this.worldName = worldName;
-		this.worldSeed = worldSeed;
+		this.levelDat = levelDat;
+		this.worldSeed = levelDat.getCompoundTag("Data").getLong("RandomSeed");
 	}
 	
 	public void initGui() {
@@ -56,11 +63,21 @@ public class GuiScreenBackupWorld extends GuiScreen {
 		if(par1GuiButton.id == 0) {
 			this.mc.displayGuiScreen(selectWorld);
 		}else if(par1GuiButton.id == 1) {
-			this.mc.displayGuiScreen(new GuiScreenSingleplayerNotImplemented(this, "recreate world"));
+			GuiCreateWorld cw = new GuiCreateWorld(selectWorld);
+			cw.func_82286_a(new WorldInfo(this.levelDat.getCompoundTag("Data")));
+			this.mc.displayGuiScreen(cw);
 		}else if(par1GuiButton.id == 2) {
-			this.mc.displayGuiScreen(new GuiScreenSingleplayerNotImplemented(this, "duplicate world"));
+			this.mc.displayGuiScreen(new GuiRenameWorld(this.selectWorld, this.worldName, true));
 		}else if(par1GuiButton.id == 3) {
-			this.mc.displayGuiScreen(new GuiScreenSingleplayerNotImplemented(this, "export world"));
+			IntegratedServer.exportWorld(worldName, IPCPacket05RequestData.REQUEST_LEVEL_EAG);
+			this.mc.displayGuiScreen(new GuiScreenSingleplayerLoading(selectWorld, "selectWorld.progress.exporting.1", () -> {
+				byte[] b = IntegratedServer.getExportResponse();
+				if(b != null) {
+					EaglerAdapter.downloadBytes(worldName + ".epk", b);
+					return true;
+				}
+				return false;
+			}));
 		}else if(par1GuiButton.id == 4) {
 			this.mc.displayGuiScreen(new GuiScreenSingleplayerNotImplemented(this, "export vanilla 1.5.2 world"));
 		}

src/main/java/net/lax1dude/eaglercraft/GuiScreenCreateWorldSelection.java

@@ -11,6 +11,8 @@ public class GuiScreenCreateWorldSelection extends GuiScreen {
 	private GuiButton worldCreate = null;
 	private GuiButton worldImport = null;
 	private GuiButton worldVanilla = null;
+	private boolean isImportingEPK = false;
+	private boolean isImportingMCA = false;
 	
 	public GuiScreenCreateWorldSelection(GuiScreen mainmenu) {
 		this.mainmenu = mainmenu;
@@ -24,6 +26,13 @@ public class GuiScreenCreateWorldSelection extends GuiScreen {
 		this.buttonList.add(new GuiButton(0, this.width / 2 - 100, this.height / 4 + 130, var1.translateKey("gui.cancel")));
 	}
 	
+	public void updateScreen() {
+		if(EaglerAdapter.getFileChooserResultAvailable() && (isImportingEPK || isImportingMCA)) {
+			this.mc.displayGuiScreen(new GuiNameWorldImport(mainmenu, EaglerAdapter.getFileChooserResultName(), isImportingEPK ? 0 : (isImportingMCA ? 1 : -1)));
+			isImportingEPK = isImportingMCA = false;
+		}
+	}
+	
 	public void drawScreen(int par1, int par2, float par3) {
 		StringTranslate var4 = StringTranslate.getInstance();
 		this.drawDefaultBackground();
@@ -48,7 +57,8 @@ public class GuiScreenCreateWorldSelection extends GuiScreen {
 		}else if(par1GuiButton.id == 1) {
 			this.mc.displayGuiScreen(new GuiCreateWorld(mainmenu));
 		}else if(par1GuiButton.id == 2) {
-			this.mc.displayGuiScreen(new GuiScreenSingleplayerNotImplemented(this, "load world backup"));
+			isImportingEPK = true;
+			EaglerAdapter.openFileChooser("epk", null);
 		}else if(par1GuiButton.id == 3) {
 			this.mc.displayGuiScreen(new GuiScreenSingleplayerNotImplemented(this, "import vanilla world"));
 		}

src/main/java/net/lax1dude/eaglercraft/GuiScreenSingleplayerException.java

@@ -0,0 +1,72 @@
+package net.lax1dude.eaglercraft;
+
+import net.lax1dude.eaglercraft.sp.ipc.IPCPacket15ThrowException;
+import net.minecraft.src.GuiButton;
+import net.minecraft.src.GuiScreen;
+import net.minecraft.src.StringTranslate;
+
+public class GuiScreenSingleplayerException extends GuiScreen {
+
+	private GuiScreen mainmenu;
+	private IPCPacket15ThrowException exception;
+	private GuiButton returnToMenu;
+	private String action;
+	
+	public GuiScreenSingleplayerException(GuiScreen mainmenu, String action, IPCPacket15ThrowException exception) {
+		this.mainmenu = mainmenu;
+		this.action = action;
+		this.exception = exception;
+	}
+	
+	public void initGui() {
+		this.buttonList.add(returnToMenu = new GuiButton(0, this.width / 2 - 100, this.height / 3 + 50, StringTranslate.getInstance().translateKey("selectWorld.progress.continue")));
+	}
+	
+	public void drawScreen(int par1, int par2, float par3) {
+		this.drawDefaultBackground();
+
+		int width_ = this.fontRenderer.getStringWidth(exception.errorMessage);
+		
+		int numTrace = exception.stackTrace.size();
+		if(numTrace > 7) {
+			numTrace = 7;
+		}
+		int height_ = numTrace * 10 + 90 + (numTrace >= 7 ? 10 : 0);
+		
+		for(String s : exception.stackTrace) {
+			int w = this.fontRenderer.getStringWidth("   " + s);
+			if(width_ < w) {
+				width_ = w;
+			}
+		}
+		
+		int top = (this.height - height_) / 2;
+		if(top < 5) top = 5;
+		int left = (this.width - width_) / 2;
+		if(left < 5) left = 5;
+
+		this.drawCenteredString(fontRenderer, "An error occured while '" + StringTranslate.getInstance().translateKey(action) + "'", this.width / 2, top, 0xFFAAAA);
+
+		this.drawCenteredString(fontRenderer, "eaglercraft singleplayer is incomplete, please DO NOT report", this.width / 2, top + 22, 0xFFFFFF);
+		this.drawCenteredString(fontRenderer, "this until you obtain a stable release or you will be mocked", this.width / 2, top + 32, 0xFFFFFF);
+		
+		this.drawString(fontRenderer, exception.errorMessage, left, top + 54, 0xFFAAAA);
+		for(int i = 0; i < numTrace; ++i) {
+			this.drawString(fontRenderer, "   " + exception.stackTrace.get(i), left, top + 64 + i * 10, 0xFFAAAA);
+		}
+		if(numTrace >= 7) {
+			this.drawCenteredString(fontRenderer, "... " + (exception.size() - numTrace) + " remaining ...", this.width / 2, top + 64 + numTrace * 10, 0xFFAAAA);
+		}
+		
+		returnToMenu.yPosition = top + 80 + numTrace * 10 + (numTrace >= 7 ? 10 : 0);
+		
+		super.drawScreen(par1, par2, par3);
+	}
+
+	protected void actionPerformed(GuiButton par1GuiButton) {
+		if(par1GuiButton.id == 0) {
+			this.mc.displayGuiScreen(mainmenu);
+		}
+	}
+	
+}

src/main/java/net/lax1dude/eaglercraft/GuiScreenSingleplayerLoading.java

@@ -1,44 +1,72 @@
 package net.lax1dude.eaglercraft;
 
+import java.util.function.BiConsumer;
 import java.util.function.BooleanSupplier;
 
+import net.lax1dude.eaglercraft.sp.ipc.IPCPacket15ThrowException;
 import net.minecraft.client.Minecraft;
 import net.minecraft.src.GuiButton;
 import net.minecraft.src.GuiMainMenu;
 import net.minecraft.src.GuiScreen;
+import net.minecraft.src.StringTranslate;
 
 public class GuiScreenSingleplayerLoading extends GuiScreen {
 
-	private GuiScreen menu;
+	public final GuiScreen menu;
 	private GuiButton killTask;
-	private String message;
+	public final String message;
 	private BooleanSupplier checkTaskComplete;
 	private Runnable taskKill;
+	private String lastStatus;
+	private String currentStatus;
+	private BiConsumer<GuiScreen, IPCPacket15ThrowException[]> onException;
+	private int areYouSure;
 	
 	private long startStartTime;
 	
-	private static final Runnable defaultTerminateAction = new Runnable() {
-		@Override
-		public void run() {
-			IntegratedServer.killWorker();
-			Minecraft.getMinecraft().displayGuiScreen(new GuiMainMenu());
+	private static final Runnable defaultTerminateAction = () -> {
+		IntegratedServer.killWorker();
+		Minecraft.getMinecraft().displayGuiScreen(new GuiMainMenu());
+	};
+	
+	public static GuiScreen createException(GuiScreen ok, String msg, IPCPacket15ThrowException[] exceptions) {
+		for(int i = exceptions.length - 1; i >= 0; --i) {
+			ok = new GuiScreenSingleplayerException(ok, msg, exceptions[i]);
 		}
+		return ok;
+	}
+	
+	private static final BiConsumer<GuiScreen, IPCPacket15ThrowException[]> defaultExceptionAction = (t, u) -> {
+		GuiScreenSingleplayerLoading tt = (GuiScreenSingleplayerLoading) t;
+		Minecraft.getMinecraft().displayGuiScreen(createException(tt.menu, tt.message, u));
 	};
 	
 	public GuiScreenSingleplayerLoading(GuiScreen menu, String message, BooleanSupplier checkTaskComplete) {
-		this(menu, message, checkTaskComplete, defaultTerminateAction);
+		this(menu, message, checkTaskComplete, defaultExceptionAction, defaultTerminateAction);
+	}
+	
+	public GuiScreenSingleplayerLoading(GuiScreen menu, String message, BooleanSupplier checkTaskComplete, BiConsumer<GuiScreen, IPCPacket15ThrowException[]> exceptionAction) {
+		this(menu, message, checkTaskComplete, exceptionAction, defaultTerminateAction);
 	}
 	
 	public GuiScreenSingleplayerLoading(GuiScreen menu, String message, BooleanSupplier checkTaskComplete, Runnable onTerminate) {
+		this(menu, message, checkTaskComplete, defaultExceptionAction, onTerminate);
+	}
+	
+	public GuiScreenSingleplayerLoading(GuiScreen menu, String message, BooleanSupplier checkTaskComplete, BiConsumer<GuiScreen, IPCPacket15ThrowException[]> onException, Runnable onTerminate) {
 		this.menu = menu;
 		this.message = message;
 		this.checkTaskComplete = checkTaskComplete;
+		this.onException = onException;
 		this.taskKill = onTerminate;
+		this.lastStatus = IntegratedServer.worldStatusString();
+		this.currentStatus = message;
 	}
 	
 	public void initGui() {
 		if(startStartTime == 0) this.startStartTime = System.currentTimeMillis();
-		this.buttonList.add(killTask = new GuiButton(0, this.width / 2 - 100, this.height / 3 + 50, "Kill Task"));
+		areYouSure = 0;
+		this.buttonList.add(killTask = new GuiButton(0, this.width / 2 - 100, this.height / 3 + 50, StringTranslate.getInstance().translateKey("gui.killTask")));
 		killTask.enabled = false;
 	}
 	
@@ -53,12 +81,24 @@ public class GuiScreenSingleplayerLoading extends GuiScreen {
 		
 		long millis = System.currentTimeMillis();
 		
-		long dots = (millis / 500l) % 4l;
-		this.drawString(fontRenderer, message + (dots > 0 ? "." : "") + (dots > 1 ? "." : "") + (dots > 2 ? "." : ""), (this.width - this.fontRenderer.getStringWidth(message)) / 2, top + 10, 0xFFFFFF);
+		String str = StringTranslate.getInstance().translateKey(currentStatus);
 		
-		long elapsed = (millis - startStartTime) / 1000l;
-		if(elapsed > 3) {
-			this.drawCenteredString(fontRenderer, "(" + elapsed + "s)", this.width / 2, top + 25, 0xFFFFFF);
+		long dots = (millis / 500l) % 4l;
+		this.drawString(fontRenderer, str + (dots > 0 ? "." : "") + (dots > 1 ? "." : "") + (dots > 2 ? "." : ""), (this.width - this.fontRenderer.getStringWidth(str)) / 2, top + 10, 0xFFFFFF);
+		
+		if(areYouSure > 0) {
+			this.drawCenteredString(fontRenderer, StringTranslate.getInstance().translateKey("selectWorld.progress.cancelWarning"), this.width / 2, top + 25, 0xFF8888);
+		}else {
+			float prog = IntegratedServer.worldStatusProgress();
+			if(this.currentStatus.equals(this.lastStatus) && prog > 0.01f) {
+				this.drawCenteredString(fontRenderer, (prog > 1.0f ? ("(" + (prog > 1000000.0f ? "" + (int)(prog / 1000000.0f) + "MB" :
+					(prog > 1000.0f ? "" + (int)(prog / 1000.0f) + "kB" : "" + (int)prog + "B")) + ")") : "" + (int)(prog * 100.0f) + "%"), this.width / 2, top + 25, 0xFFFFFF);
+			}else {
+				long elapsed = (millis - startStartTime) / 1000l;
+				if(elapsed > 3) {
+					this.drawCenteredString(fontRenderer, "(" + elapsed + "s)", this.width / 2, top + 25, 0xFFFFFF);
+				}
+			}
 		}
 		
 		super.drawScreen(par1, par2, par3);
@@ -69,14 +109,31 @@ public class GuiScreenSingleplayerLoading extends GuiScreen {
 		if(millis - startStartTime > 6000l) {
 			killTask.enabled = true;
 		}
+		if(IntegratedServer.didLastCallFail()) {
+			onException.accept(this, IntegratedServer.worldStatusErrors());
+			return;
+		}
 		if(checkTaskComplete.getAsBoolean()) {
 			this.mc.displayGuiScreen(menu);
 		}
+		String str = IntegratedServer.worldStatusString();
+		if(!lastStatus.equals(str)) {
+			lastStatus = str;
+			currentStatus = str;
+		}
+		killTask.displayString = StringTranslate.getInstance().translateKey(areYouSure > 0 ? "selectWorld.progress.confirmCancel" : "gui.killTask");
+		if(areYouSure > 0) {
+			--areYouSure;
+		}
 	}
 
 	protected void actionPerformed(GuiButton par1GuiButton) {
 		if(par1GuiButton.id == 0) {
-			taskKill.run();
+			if(areYouSure <= 0) {
+				areYouSure = 80;
+			}else if(areYouSure <= 40) {
+				taskKill.run();
+			}
 		}
 	}
 	

src/main/java/net/lax1dude/eaglercraft/IntegratedServer.java

@@ -34,6 +34,7 @@ public class IntegratedServer {
 	}
 	
 	public static void begin(String[] locale, String[] stats) {
+		logException = true;
 		if(!isWorkerAlive()) {
 			openConnections.clear();
 			exceptions.clear();
@@ -129,7 +130,7 @@ public class IntegratedServer {
 	
 	public static NBTTagCompound getWorld(String folderName) {
 		for(NBTTagCompound nbt : worlds) {
-			if(folderName.equals(nbt.getString(folderName))) {
+			if(folderName.equals(nbt.getString("folderName"))) {
 				return nbt;
 			}
 		}
@@ -177,12 +178,52 @@ public class IntegratedServer {
 		return exceptions.size() > 0 ? exceptions.remove(0) : null;
 	}
 	
+	public static IPCPacket15ThrowException[] worldStatusErrors() {
+		if(exceptions.size() <= 0) {
+			return null;
+		}
+		IPCPacket15ThrowException[] t = new IPCPacket15ThrowException[exceptions.size()];
+		for(int i = 0; i < t.length; ++i) {
+			t[i] = exceptions.get(i);
+		}
+		exceptions.clear();
+		return t;
+	}
+	
 	private static boolean logException = false;
 	
 	public static void enableExceptionLog(boolean f) {
 		logException = f;
 	}
 	
+	private static boolean callFailed = false;
+	
+	public static boolean didLastCallFail() {
+		boolean c = callFailed;
+		callFailed = false;
+		return c;
+	}
+	
+	public static void importWorld(String name, byte[] data, int format) {
+		ensureReady();
+		statusState = IntegratedState.WORLD_IMPORTING;
+		sendIPCPacket(new IPCPacket07ImportWorld(name, data, (byte)format));
+	}
+	
+	public static void exportWorld(String name, int format) {
+		ensureReady();
+		statusState = IntegratedState.WORLD_EXPORTING;
+		sendIPCPacket(new IPCPacket05RequestData(name, (byte)format));
+	}
+	
+	private static byte[] exportResponse = null;
+
+	public static byte[] getExportResponse() {
+		byte[] dat = exportResponse;
+		exportResponse = null;
+		return dat;
+	}
+	
 	public static void processICP() {
 		
 		if(!EaglerAdapter.isIntegratedServerAlive()) {
@@ -223,6 +264,11 @@ public class IntegratedServer {
 							case IPCPacket0BPause.ID:
 								statusState = isPaused ? IntegratedState.WORLD_PAUSED : IntegratedState.WORLD_LOADED;
 								break;
+							case IPCPacketFFProcessKeepAlive.FAILURE:
+								System.err.println("Server signaled 'FAILURE' response in state '" + IntegratedState.getStateName(statusState) + "'");
+								statusState = IntegratedState.WORLD_NONE;
+								callFailed = true;
+								break;
 							case IPCPacket01StopServer.ID:
 							case IPCPacket03DeleteWorld.ID:
 							case IPCPacket04RenameWorld.ID:
@@ -239,9 +285,12 @@ public class IntegratedServer {
 					}
 					case IPCPacket09RequestResponse.ID: {
 						IPCPacket09RequestResponse pkt = (IPCPacket09RequestResponse)packet;
-						
-						// import/export/read 
-						
+						if(statusState == IntegratedState.WORLD_EXPORTING) {
+							statusState = IntegratedState.WORLD_NONE;
+							exportResponse = pkt.response;
+						}else {
+							System.err.println("IPCPacket09RequestResponse was recieved but statusState was '" + IntegratedState.getStateName(statusState) + "' instead of 'WORLD_EXPORTING'");
+						}
 						break;
 					}
 					case IPCPacket0DProgressUpdate.ID: {
@@ -249,7 +298,7 @@ public class IntegratedServer {
 						worldStatusString = pkt.updateMessage;
 						worldStatusProgress = pkt.updateProgress;
 						if(logException) {
-							System.out.println("IntegratedServer: task '" + pkt.updateMessage + "' is " + ((int)(pkt.updateProgress * 100.0f)) + "% complete");
+							System.out.println("IntegratedServer: task \"" + pkt.updateMessage + "\"" + (pkt.updateProgress > 0.0f ? " is " + ((int)(pkt.updateProgress * 100.0f)) + "% complete" : ""));
 						}
 						break;
 					}

src/main/java/net/minecraft/client/Minecraft.java

@@ -494,7 +494,7 @@ public class Minecraft implements Runnable {
 	public void stopServerAndDisplayGuiScreen(GuiScreen par1GuiScreen) {
 		if(IntegratedServer.isWorldRunning()) {
 			IntegratedServer.unloadWorld();
-			displayGuiScreen(new GuiScreenSingleplayerLoading(par1GuiScreen, "saving world", () -> !IntegratedServer.isWorldRunning()));
+			displayGuiScreen(new GuiScreenSingleplayerLoading(par1GuiScreen, "saving world", () -> IntegratedServer.isReady()));
 		}else {
 			displayGuiScreen(par1GuiScreen);
 		}
@@ -1191,7 +1191,7 @@ public class Minecraft implements Runnable {
 					}
 
 					if (this.currentScreen == null) {
-						if (!this.inGameHasFocus && EaglerAdapter.mouseGetEventButtonState()) {
+						if ((!this.inGameHasFocus || !EaglerAdapter.isPointerLocked()) && EaglerAdapter.mouseGetEventButtonState()) {
 							this.setIngameFocus();
 						}
 					} else if (this.currentScreen != null) {
@@ -1792,7 +1792,7 @@ public class Minecraft implements Runnable {
 	 * the integrated one.
 	 */
 	public boolean isSingleplayer() {
-		return isIntegratedServerRunning();
+		return isIntegratedServerRunning() && (this.theWorld == null || this.theWorld.playerEntities.size() <= 1);
 	}
 	
 	/**

src/main/java/net/minecraft/src/GuiCreateWorld.java

@@ -136,22 +136,24 @@ public class GuiCreateWorld extends GuiScreen {
 	 * available.
 	 */
 	private void makeUseableName() {
-		this.folderName = this.textboxWorldName.getText().trim();
+		this.folderName = makeUsableName(this.textboxWorldName.getText().trim());
+	}
+
+	public static String makeUsableName(String s) {
 		char[] var1 = ChatAllowedCharacters.allowedCharactersArray;
 		int var2 = var1.length;
 
 		for (int var3 = 0; var3 < var2; ++var3) {
 			char var4 = var1[var3];
-			this.folderName = this.folderName.replace(var4, '_');
+			s = s.replace(var4, '_');
 		}
 
-		if (MathHelper.stringNullOrLengthZero(this.folderName)) {
-			this.folderName = "World";
+		if (MathHelper.stringNullOrLengthZero(s)) {
+			s = "World";
 		}
-
-		this.folderName = func_73913_a(this.folderName);
+		return func_73913_a(s);
 	}
-
+	
 	private void updateButtonText() {
 		StringTranslate var1 = StringTranslate.getInstance();
 		this.buttonGameMode.displayString = var1.translateKey("selectWorld.gameMode") + " "

src/main/java/net/minecraft/src/GuiRenameWorld.java

@@ -1,15 +1,25 @@
 package net.minecraft.src;
 
 import net.lax1dude.eaglercraft.EaglerAdapter;
+import net.lax1dude.eaglercraft.GuiScreenSingleplayerLoading;
+import net.lax1dude.eaglercraft.IntegratedServer;
 
 public class GuiRenameWorld extends GuiScreen {
 	private GuiScreen parentGuiScreen;
 	private GuiTextField theGuiTextField;
 	private final String worldName;
+	private final boolean duplicate;
 
 	public GuiRenameWorld(GuiScreen par1GuiScreen, String par2Str) {
 		this.parentGuiScreen = par1GuiScreen;
 		this.worldName = par2Str;
+		this.duplicate = false;
+	}
+
+	public GuiRenameWorld(GuiScreen par1GuiScreen, String par2Str, boolean d) {
+		this.parentGuiScreen = par1GuiScreen;
+		this.worldName = par2Str;
+		this.duplicate = d;
 	}
 
 	/**
@@ -27,12 +37,15 @@ public class GuiRenameWorld extends GuiScreen {
 		EaglerAdapter.enableRepeatEvents(true);
 		this.buttonList.clear();
 		this.buttonList.add(new GuiButton(0, this.width / 2 - 100, this.height / 4 + 96 + 12,
-				var1.translateKey("selectWorld.renameButton")));
+				var1.translateKey(duplicate ? "selectWorld.duplicateButton" : "selectWorld.renameButton")));
 		this.buttonList.add(
 				new GuiButton(1, this.width / 2 - 100, this.height / 4 + 120 + 12, var1.translateKey("gui.cancel")));
 		//ISaveFormat var2 = this.mc.getSaveLoader();
 		//WorldInfo var3 = var2.getWorldInfo(this.worldName);
 		String var4 = worldName; //var3.getWorldName(); //TODO: add rename logic
+		if(duplicate) {
+			var4 = "Copy of " + var4;
+		}
 		this.theGuiTextField = new GuiTextField(this.fontRenderer, this.width / 2 - 100, this.height / 4 + 3, 200, 20);
 		this.theGuiTextField.setFocused(true);
 		this.theGuiTextField.setText(var4);
@@ -56,7 +69,13 @@ public class GuiRenameWorld extends GuiScreen {
 			} else if (par1GuiButton.id == 0) {
 				//ISaveFormat var2 = this.mc.getSaveLoader();
 				//var2.renameWorld(this.worldName, this.theGuiTextField.getText().trim());
-				this.mc.displayGuiScreen(this.parentGuiScreen);
+				String str = theGuiTextField.getText().trim();
+				if(duplicate) {
+					IntegratedServer.copyMoveWorld(worldName, GuiCreateWorld.makeUsableName(str), str, true);
+				}else {
+					IntegratedServer.setWorldName(worldName, str);
+				}
+				this.mc.displayGuiScreen(new GuiScreenSingleplayerLoading(this.parentGuiScreen, "selectWorld.progress." + (duplicate ? "copying" : "renaming"), () -> IntegratedServer.isReady()));
 			}
 		}
 	}
@@ -88,7 +107,7 @@ public class GuiRenameWorld extends GuiScreen {
 	public void drawScreen(int par1, int par2, float par3) {
 		StringTranslate var4 = StringTranslate.getInstance();
 		this.drawDefaultBackground();
-		this.drawCenteredString(this.fontRenderer, var4.translateKey("selectWorld.renameTitle"), this.width / 2, this.height / 4 - 60 + 20, 16777215);
+		this.drawCenteredString(this.fontRenderer, var4.translateKey("selectWorld." + (duplicate ? "duplicateTitle" : "renameTitle")), this.width / 2, this.height / 4 - 60 + 20, 16777215);
 		this.drawString(this.fontRenderer, var4.translateKey("selectWorld.enterName"), this.width / 2 - 100, this.height / 4 - 60 + 50, 10526880);
 		this.theGuiTextField.drawTextBox();
 		super.drawScreen(par1, par2, par3);

src/main/java/net/minecraft/src/GuiSelectWorld.java

@@ -2,11 +2,13 @@ package net.minecraft.src;
 
 import java.text.DateFormat;
 import java.text.SimpleDateFormat;
+import java.util.Collections;
 import java.util.LinkedList;
 import java.util.List;
 
 import net.lax1dude.eaglercraft.GuiScreenBackupWorld;
 import net.lax1dude.eaglercraft.GuiScreenCreateWorldSelection;
+import net.lax1dude.eaglercraft.GuiScreenSingleplayerLoading;
 import net.lax1dude.eaglercraft.GuiScreenSingleplayerNotImplemented;
 import net.lax1dude.eaglercraft.IntegratedServer;
 
@@ -94,12 +96,15 @@ public class GuiSelectWorld extends GuiScreen {
 	 * loads the saves
 	 */
 	private void loadSaves() {
+		this.saveList.clear();
 		List<NBTTagCompound> levels = IntegratedServer.getWorldList();
 		for(NBTTagCompound n : levels) {
 			WorldInfo w = new WorldInfo(n.getCompoundTag("Data"));
 			this.saveList.add(new SaveFormatComparator(n.getString("folderName"), w.getWorldName(), w.getLastTimePlayed(),
 					w.getSizeOnDisk(), w.getGameType(), false, w.isHardcoreModeEnabled(), w.areCommandsAllowed(), n));
 		}
+		Collections.sort(this.saveList);
+		this.selectedWorld = -1;
 	}
 
 	/**
@@ -147,7 +152,6 @@ public class GuiSelectWorld extends GuiScreen {
 	protected void actionPerformed(GuiButton par1GuiButton) {
 		if (par1GuiButton.enabled) {
 			if (par1GuiButton.id == 2) {
-				/*
 				String var2 = this.getSaveName(this.selectedWorld);
 
 				if (var2 != null) {
@@ -155,8 +159,7 @@ public class GuiSelectWorld extends GuiScreen {
 					GuiYesNo var3 = getDeleteWorldScreen(this, var2, this.selectedWorld);
 					this.mc.displayGuiScreen(var3);
 				}
-				*/
-				this.mc.displayGuiScreen(new GuiScreenSingleplayerNotImplemented(this, "delete world"));
+				//this.mc.displayGuiScreen(new GuiScreenSingleplayerNotImplemented(this, "delete world"));
 			} else if (par1GuiButton.id == 1) {
 				this.selectWorld(this.selectedWorld);
 			} else if (par1GuiButton.id == 3) {
@@ -169,7 +172,8 @@ public class GuiSelectWorld extends GuiScreen {
 				//GuiCreateWorld var5 = new GuiCreateWorld(this);
 				//var5.func_82286_a(new WorldInfo(this.saveList.get(this.selectedWorld).levelDat));
 				//this.mc.displayGuiScreen(var5);
-				this.mc.displayGuiScreen(new GuiScreenBackupWorld(this, this.getSaveFileName(this.selectedWorld), 11111111l));
+				this.mc.displayGuiScreen(new GuiScreenBackupWorld(this, this.getSaveFileName(this.selectedWorld),
+						((SaveFormatComparator)getSize(this).get(selectedWorld)).levelDat));
 			} else {
 				this.worldSlotContainer.actionPerformed(par1GuiButton);
 			}
@@ -204,13 +208,18 @@ public class GuiSelectWorld extends GuiScreen {
 	public void confirmClicked(boolean par1, int par2) {
 		if (this.deleting) {
 			this.deleting = false;
-/*
+			/*
 			if (par1) {
 				waitingForWorlds = true;
 				IntegratedServer.requestWorldList();
 			}
-*/
-			this.mc.displayGuiScreen(this);
+			*/
+			if (par1) {
+				IntegratedServer.deleteWorld(this.getSaveFileName(par2));
+				this.mc.displayGuiScreen(new GuiScreenSingleplayerLoading(this, "selectWorld.progress.deleting", () -> IntegratedServer.isReady()));
+			}else {
+				this.mc.displayGuiScreen(this);
+			}
 		}
 	}
 

src/teavm/java/net/lax1dude/eaglercraft/adapter/EaglerAdapterImpl2.java

@@ -291,6 +291,7 @@ public class EaglerAdapterImpl2 {
 				"var f = window.eagsFileChooser.inputElement.files;\r\n" + 
 				"if(f.length == 0){\r\n" + 
 				"window.eagsFileChooser.getFileChooserResult = null;\r\n" + 
+				"window.eagsFileChooser.getFileChooserResultName = \"<none>\";\r\n" + 
 				"}else{\r\n" + 
 				"(async function(){\r\n" + 
 				"window.eagsFileChooser.getFileChooserResult = await f[0].arrayBuffer();\r\n" + 
@@ -300,7 +301,7 @@ public class EaglerAdapterImpl2 {
 				"});\r\n" + 
 				"window.eagsFileChooser.getFileChooserResult = null;\r\n" + 
 				"window.eagsFileChooser.getFileChooserResultName = null;\r\n" + 
-				"el.accept = mime;\r\n" + 
+				"el.accept = (mime === null ? \".\"+ext : mime);\r\n" + 
 				"el.click();\r\n" + 
 				"},\r\n" + 
 				"getFileChooserResult: null,\r\n" + 
@@ -1097,6 +1098,9 @@ public class EaglerAdapterImpl2 {
 	@JSBody(params = { "ext", "mime" }, script = "window.eagsFileChooser.openFileChooser(ext, mime);")
 	public static native void openFileChooser(String ext, String mime);
 	
+	@JSBody(params = { }, script = "return window.eagsFileChooser.getFileChooserResult != null;")
+	public static final native boolean getFileChooserResultAvailable();
+	
 	public static final byte[] getFileChooserResult() {
 		ArrayBuffer b = getFileChooserResult0();
 		if(b == null) return null;
@@ -1692,4 +1696,18 @@ public class EaglerAdapterImpl2 {
 			}
 		}
 	}
+	
+	@JSBody(params = { "name", "buf" }, script =
+		"var hr = window.URL.createObjectURL(new Blob([buf], {type: \"octet/stream\"}));" +
+		"var a = document.createElement(\"a\");" +
+		"a.href = hr; a.download = name; a.click();" +
+		"window.URL.revokeObjectURL(hr);")
+	private static final native void downloadBytesImpl(String str, ArrayBuffer buf);
+	
+	public static final void downloadBytes(String str, byte[] dat) {
+		ArrayBuffer d = ArrayBuffer.create(dat.length);
+		Uint8Array.create(d).set(dat);
+		downloadBytesImpl(str, d);
+	}
+	
 }

stable-download/java/bukkit_command/run_unix.sh

@@ -0,0 +1,2 @@
+#!/bin/sh
+java -Xmx512M -Xms512M -jar craftbukkit-1.5.2-R1.0.jar

stable-download/java/bungee_command/run_unix.sh

@@ -0,0 +1,2 @@
+#!/bin/sh
+java -Xmx32M -Xms32M -jar bungee-dist.jar