Merge branch 'pos-protect'

# Conflicts:
#	src/main/java/org/samo_lego/simpleauth/SimpleAuth.java
#	src/main/java/org/samo_lego/simpleauth/event/AuthEventHandler.java
#	src/main/java/org/samo_lego/simpleauth/storage/PlayerCache.java
#	src/main/resources/fabric.mod.json

src/main/java/org/samo_lego/simpleauth/SimpleAuth.java

@@ -1,16 +1,20 @@
 package org.samo_lego.simpleauth;
 
+import com.google.gson.JsonObject;
 import net.fabricmc.api.DedicatedServerModInitializer;
 import net.fabricmc.fabric.api.event.player.*;
 import net.fabricmc.fabric.api.event.server.ServerStopCallback;
 import net.fabricmc.fabric.api.registry.CommandRegistry;
 import net.fabricmc.loader.api.FabricLoader;
 import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.network.ServerPlayerEntity;
 import net.minecraft.text.LiteralText;
 import net.minecraft.text.Text;
+import net.minecraft.world.dimension.DimensionType;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
+import org.iq80.leveldb.WriteBatch;
 import org.samo_lego.simpleauth.commands.*;
 import org.samo_lego.simpleauth.event.AuthEventHandler;
 import org.samo_lego.simpleauth.event.entity.player.*;
@@ -21,13 +25,12 @@ import org.samo_lego.simpleauth.storage.PlayerCache;
 import org.samo_lego.simpleauth.storage.SimpleAuthDatabase;
 
 import java.io.File;
-import java.io.FileReader;
-import java.io.IOException;
 import java.util.HashMap;
 import java.util.Properties;
 import java.util.Timer;
 import java.util.TimerTask;
 
+import static org.iq80.leveldb.impl.Iq80DBFactory.bytes;
 import static org.samo_lego.simpleauth.utils.CarpetHelper.isPlayerCarpetFake;
 import static org.samo_lego.simpleauth.utils.UuidConverter.convertUuid;
 
@@ -109,6 +112,32 @@ public class SimpleAuth implements DedicatedServerModInitializer {
 
 	private static void onStopServer() {
 		LOGGER.info("[SimpleAuth] Shutting down SimpleAuth.");
+
+		WriteBatch batch = db.levelDBStore.createWriteBatch();
+		// Writing coords of de-authenticated players to database
+		deauthenticatedUsers.forEach((uuid, playerCache) -> {
+			JsonObject data = new JsonObject();
+			data.addProperty("password", playerCache.password);
+
+			JsonObject lastLocation = new JsonObject();
+			lastLocation.addProperty("dimId", playerCache.lastDimId);
+			lastLocation.addProperty("x", playerCache.lastX);
+			lastLocation.addProperty("y", playerCache.lastY);
+			lastLocation.addProperty("z", playerCache.lastZ);
+
+			data.addProperty("lastLocation", lastLocation.toString());
+
+			batch.put(bytes("UUID:" + uuid), bytes("data:" + data.toString()));
+		});
+		try {
+			// Writing and closing batch
+			db.levelDBStore.write(batch);
+			batch.close();
+		} catch (IOException e) {
+			LOGGER.error("[SimpleAuth] Error saving player data! " + e.getMessage());
+		}
+
+		// Closing DB connection
 		db.close();
 	}
 
@@ -122,7 +151,12 @@ public class SimpleAuth implements DedicatedServerModInitializer {
 
 	// Authenticates player and sends the message
 	public static void authenticatePlayer(ServerPlayerEntity player, Text msg) {
+		// Teleporting player back
+		if(config.main.spawnOnJoin)
+			teleportPlayer(player, false);
+
 		deauthenticatedUsers.remove(convertUuid(player));
+
 		// Player no longer needs to be invisible and invulnerable
 		player.setInvulnerable(false);
 		player.setInvisible(false);
@@ -133,9 +167,14 @@ public class SimpleAuth implements DedicatedServerModInitializer {
 	public static void deauthenticatePlayer(ServerPlayerEntity player) {
 		if(db.isClosed())
 			return;
+
 		// Marking player as not authenticated, (re)setting login tries to zero
 		String uuid = convertUuid(player);
-		SimpleAuth.deauthenticatedUsers.put(uuid, new PlayerCache(uuid, player.getIp()));
+		SimpleAuth.deauthenticatedUsers.put(uuid, new PlayerCache(uuid, player));
+
+		// Teleporting player to spawn to hide its position
+		if(config.main.spawnOnJoin)
+			teleportPlayer(player, true);
 
 		// Player is now not authenticated
 		player.sendMessage(notAuthenticated(), false);
@@ -157,4 +196,33 @@ public class SimpleAuth implements DedicatedServerModInitializer {
 		// We ask CarpetHelper class since it has the imports needed
 		return FabricLoader.getInstance().isModLoaded("carpet") && isPlayerCarpetFake(player);
 	}
+
+	// Teleports player to spawn or last location when authenticating
+	public static void teleportPlayer(ServerPlayerEntity player, boolean toSpawn) {
+		MinecraftServer server = player.getServer();
+		if(server == null)
+			return;
+		if (toSpawn) {
+			// Teleports player to spawn
+			player.teleport(
+					server.getWorld(DimensionType.byRawId(config.worldSpawn.dimensionId)),
+					config.worldSpawn.x,
+					config.worldSpawn.y,
+					config.worldSpawn.z,
+					0,
+					0
+			);
+			return;
+		}
+		PlayerCache cache = deauthenticatedUsers.get(convertUuid(player));
+		// Puts player to last cached position
+		player.teleport(
+				server.getWorld(DimensionType.byRawId(cache.lastDimId)),
+				cache.lastX,
+				cache.lastY,
+				cache.lastZ,
+				0,
+				0
+		);
+	}
 }

src/main/java/org/samo_lego/simpleauth/commands/AuthCommand.java

@@ -2,6 +2,7 @@ package org.samo_lego.simpleauth.commands;
 
 import com.google.gson.JsonObject;
 import com.mojang.brigadier.CommandDispatcher;
+import net.minecraft.command.arguments.BlockPosArgumentType;
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.server.command.ServerCommandSource;
@@ -15,19 +16,24 @@ import org.samo_lego.simpleauth.storage.PlayerCache;
 import org.samo_lego.simpleauth.utils.AuthHelper;
 
 import java.io.File;
+import java.util.Objects;
 
+import static com.mojang.brigadier.arguments.IntegerArgumentType.getInteger;
+import static com.mojang.brigadier.arguments.IntegerArgumentType.integer;
 import static com.mojang.brigadier.arguments.StringArgumentType.getString;
 import static com.mojang.brigadier.arguments.StringArgumentType.word;
 import static net.minecraft.server.command.CommandManager.argument;
 import static net.minecraft.server.command.CommandManager.literal;
+import static org.samo_lego.simpleauth.SimpleAuth.config;
+import static org.samo_lego.simpleauth.SimpleAuth.db;
 
 public class AuthCommand {
     private static final Logger LOGGER = LogManager.getLogger();
 
-    private static Text userdataDeleted = new LiteralText(SimpleAuth.config.lang.userdataDeleted);
+    private static Text userdataDeleted = new LiteralText(config.lang.userdataDeleted);
-    private static Text userdataUpdated = new LiteralText(SimpleAuth.config.lang.userdataUpdated);
+    private static Text userdataUpdated = new LiteralText(config.lang.userdataUpdated);
-    private static Text configurationReloaded = new LiteralText(SimpleAuth.config.lang.configurationReloaded);
+    private static Text configurationReloaded = new LiteralText(config.lang.configurationReloaded);
-    private static Text globalPasswordSet = new LiteralText(SimpleAuth.config.lang.globalPasswordSet);
+    private static Text globalPasswordSet = new LiteralText(config.lang.globalPasswordSet);
 
     public static void registerCommand(CommandDispatcher<ServerCommandSource> dispatcher) {
         // Registering the "/auth" command
@@ -44,6 +50,27 @@ public class AuthCommand {
                             ))
                     )
             )
+            .then(literal("setSpawn")
+                    .executes( ctx -> setSpawn(
+                            ctx.getSource(),
+                            Objects.requireNonNull(ctx.getSource().getEntity()).dimension.getRawId(),
+                            ctx.getSource().getEntity().getX(),
+                            ctx.getSource().getEntity().getY(),
+                            ctx.getSource().getEntity().getZ()
+                    ))
+                    .then(argument("dimension id", integer())
+                            .then(argument("position", BlockPosArgumentType.blockPos())
+                                .executes(ctx -> setSpawn(
+                                    ctx.getSource(),
+                                    getInteger(ctx, "dimension id"),
+                                    BlockPosArgumentType.getLoadedBlockPos(ctx, "position").getX(),
+                                    // +1 to not spawn player in ground
+                                    BlockPosArgumentType.getLoadedBlockPos(ctx, "position").getY() + 1,
+                                    BlockPosArgumentType.getLoadedBlockPos(ctx, "position").getZ()
+                                ))
+                            )
+                    )
+            )
             .then(literal("remove")
                 .then(argument("uuid", word())
                     .executes( ctx -> removeAccount(
@@ -80,12 +107,12 @@ public class AuthCommand {
     // Reloading the config
     private static int reloadConfig(ServerCommandSource source) {
         Entity sender = source.getEntity();
-        SimpleAuth.config = AuthConfig.load(new File("./mods/SimpleAuth/config.json"));
+        config = AuthConfig.load(new File("./mods/SimpleAuth/config.json"));
 
         if(sender != null)
             ((PlayerEntity) sender).sendMessage(configurationReloaded, false);
         else
-            LOGGER.info(SimpleAuth.config.lang.configurationReloaded);
+            LOGGER.info(config.lang.configurationReloaded);
         return 1;
     }
 
@@ -94,27 +121,41 @@ public class AuthCommand {
         // Getting the player who send the command
         Entity sender = source.getEntity();
         // Writing the global pass to config
-        SimpleAuth.config.main.globalPassword = AuthHelper.hashPass(pass.toCharArray());
+        config.main.globalPassword = AuthHelper.hashPass(pass.toCharArray());
-        SimpleAuth.config.main.enableGlobalPassword = true;
+        config.main.enableGlobalPassword = true;
-        SimpleAuth.config.save(new File("./mods/SimpleAuth/config.json"));
+        config.save(new File("./mods/SimpleAuth/config.json"));
 
         if(sender != null)
             ((PlayerEntity) sender).sendMessage(globalPasswordSet, false);
         else
-            LOGGER.info(SimpleAuth.config.lang.globalPasswordSet);
+            LOGGER.info(config.lang.globalPasswordSet);
+        return 1;
+    }
+
+    //
+    private static int setSpawn(ServerCommandSource source, int dimensionId, double x, double y, double z) {
+        config.worldSpawn.dimensionId = dimensionId;
+        config.worldSpawn.x = x;
+        config.worldSpawn.y = y;
+        config.worldSpawn.z = z;
+        Entity sender = source.getEntity();
+        if(sender != null)
+            sender.sendSystemMessage(new LiteralText(config.lang.worldSpawnSet));
+        else
+            LOGGER.info(config.lang.worldSpawnSet);
         return 1;
     }
 
     // Deleting (unregistering) user's account
     private static int removeAccount(ServerCommandSource source, String uuid) {
         Entity sender = source.getEntity();
-        SimpleAuth.db.deleteUserData(uuid);
+        db.deleteUserData(uuid);
-        SimpleAuth.deauthenticatedUsers.put(uuid, new PlayerCache(uuid, ""));
+        SimpleAuth.deauthenticatedUsers.put(uuid, new PlayerCache(uuid, null));
 
         if(sender != null)
             ((PlayerEntity) sender).sendMessage(userdataDeleted, false);
         else
-            LOGGER.info(SimpleAuth.config.lang.userdataDeleted);
+            LOGGER.info(config.lang.userdataDeleted);
         return 1; // Success
     }
 
@@ -128,11 +169,11 @@ public class AuthCommand {
         String hash = AuthHelper.hashPass(password.toCharArray());
         playerdata.addProperty("password", hash);
 
-        if(SimpleAuth.db.registerUser(uuid, playerdata.toString())) {
+        if(db.registerUser(uuid, playerdata.toString())) {
             if(sender != null)
                 ((PlayerEntity) sender).sendMessage(userdataUpdated, false);
             else
-                LOGGER.info(SimpleAuth.config.lang.userdataUpdated);
+                LOGGER.info(config.lang.userdataUpdated);
             return 1;
         }
         return 0;
@@ -148,11 +189,11 @@ public class AuthCommand {
         String hash = AuthHelper.hashPass(password.toCharArray());
         playerdata.addProperty("password", hash);
 
-        SimpleAuth.db.updateUserData(uuid, playerdata.toString());
+        db.updateUserData(uuid, playerdata.toString());
         if(sender != null)
             ((PlayerEntity) sender).sendMessage(userdataUpdated, false);
         else
-            LOGGER.info(SimpleAuth.config.lang.userdataUpdated);
+            LOGGER.info(config.lang.userdataUpdated);
         return 1;
     }
     // todo PlayerEntity.getOfflinePlayerUuid("")

src/main/java/org/samo_lego/simpleauth/event/AuthEventHandler.java

@@ -71,16 +71,17 @@ public class AuthEventHandler {
         return null;
     }
 
+
     // Player joining the server
     public static void onPlayerJoin(ServerPlayerEntity player) {
         // If player is fake auth is not needed
-        if(isPlayerFake(player))
+        if (isPlayerFake(player))
             return;
         // Checking if session is still valid
         String uuid = convertUuid(player);
         PlayerCache playerCache = deauthenticatedUsers.getOrDefault(uuid, null);
 
-        if(playerCache != null) {
+        if (playerCache != null) {
             if (
                 playerCache.wasAuthenticated &&
                 playerCache.validUntil >= System.currentTimeMillis() &&
@@ -89,11 +90,15 @@ public class AuthEventHandler {
                 deauthenticatedUsers.remove(uuid); // Makes player authenticated
                 return;
             }
-            // Session is invalid
+            // Invalidating session
+            playerCache.wasAuthenticated = false;
         }
         else
             deauthenticatePlayer(player);
 
+        if(config.main.spawnOnJoin)
+            teleportPlayer(player, true);
+
         // Tries to rescue player from nether portal
         if(config.main.tryPortalRescue && player.getBlockState().getBlock().equals(Blocks.NETHER_PORTAL)) {
             boolean wasSuccessful = false;
@@ -165,11 +170,7 @@ public class AuthEventHandler {
     }
 
     public static void onPlayerLeave(ServerPlayerEntity player) {
-        if(
+        if(isPlayerFake(player) || !isAuthenticated(player) || config.main.sessionTimeoutTime == -1)
-            !isAuthenticated(player) ||
-            config.main.sessionTimeoutTime == -1 ||
-            isPlayerFake(player)
-        )
             return;
 
         // Starting session
@@ -180,6 +181,7 @@ public class AuthEventHandler {
         PlayerCache playerCache = deauthenticatedUsers.get(convertUuid(player));
         if(playerCache == null)
             return;
+
         playerCache.wasAuthenticated = true;
         // Setting the session expire time
         playerCache.validUntil = System.currentTimeMillis() + config.main.sessionTimeoutTime * 1000;

src/main/java/org/samo_lego/simpleauth/mixin/MixinServerPlayNetworkHandler.java

@@ -3,12 +3,14 @@ package org.samo_lego.simpleauth.mixin;
 import net.minecraft.network.packet.c2s.play.ChatMessageC2SPacket;
 import net.minecraft.network.packet.c2s.play.PlayerActionC2SPacket;
 import net.minecraft.network.packet.c2s.play.PlayerMoveC2SPacket;
+import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.network.ServerPlayNetworkHandler;
 import net.minecraft.server.network.ServerPlayerEntity;
 import net.minecraft.util.ActionResult;
 import org.samo_lego.simpleauth.event.entity.player.ChatCallback;
 import org.samo_lego.simpleauth.event.entity.player.PlayerMoveCallback;
 import org.samo_lego.simpleauth.event.item.TakeItemCallback;
+import org.spongepowered.asm.mixin.Final;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Shadow;
 import org.spongepowered.asm.mixin.injection.At;
@@ -22,6 +24,10 @@ public abstract class MixinServerPlayNetworkHandler {
     @Shadow
     public ServerPlayerEntity player;
 
+    @Final
+    @Shadow
+    private MinecraftServer server;
+
     @Inject(
             method = "onGameMessage(Lnet/minecraft/network/packet/c2s/play/ChatMessageC2SPacket;)V",
             at = @At(

src/main/java/org/samo_lego/simpleauth/storage/AuthConfig.java

@@ -40,7 +40,7 @@ public class AuthConfig {
         // Disables registering and forces logging in with global password
         // Visit https://github.com/samolego/SimpleAuth/wiki/Locking-server-with-global-password for more info
         public boolean enableGlobalPassword = false;
-        public String globalPassword = null;
+        public String globalPassword;
         // Tries to rescue players if they are stuck inside a portal on logging in
         // Visit https://github.com/samolego/SimpleAuth/wiki/Portal-Rescue for more info
         public boolean tryPortalRescue = true;
@@ -54,6 +54,14 @@ public class AuthConfig {
         // Set to -1 to disable
         // Visit https://github.com/samolego/SimpleAuth/wiki/Sessions for more info
         public int sessionTimeoutTime = 60;
+
+        public boolean spawnOnJoin =  false;
+        public static class WorldSpawn {
+                public int dimensionId;
+                public double x;
+                public double y;
+                public double z;
+        }
     }
     public static class LangConfig {
         public String enterPassword = "§6You need to enter your password!";
@@ -83,6 +91,7 @@ public class AuthConfig {
         public String minPasswordChars = "§6Password needs to be at least %d characters long!";
         public String disallowedUsername = "§6Invalid username characters! Allowed character regex: %s";
         public String playerAlreadyOnline = "§cPlayer %s is already online!";
+        public String worldSpawnSet = "§aSpawn for logging in was set successfully.";
     }
     public static class ExperimentalConfig {
         // Prevents player being kicked because another player with the same name has joined the server
@@ -114,6 +123,7 @@ public class AuthConfig {
             .create();
 
     public MainConfig main = new MainConfig();
+    public MainConfig.WorldSpawn worldSpawn = new MainConfig.WorldSpawn();
     public LangConfig lang = new LangConfig();
     public ExperimentalConfig experimental = new ExperimentalConfig();
 

src/main/java/org/samo_lego/simpleauth/storage/PlayerCache.java

@@ -1,8 +1,12 @@
 package org.samo_lego.simpleauth.storage;
 
+import com.google.gson.Gson;
+import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
-import com.google.gson.JsonParser;
+import com.google.gson.JsonSyntaxException;
+import net.minecraft.server.network.ServerPlayerEntity;
 
+import static org.samo_lego.simpleauth.SimpleAuth.config;
 import static org.samo_lego.simpleauth.SimpleAuth.db;
 
 public class PlayerCache {
@@ -12,22 +16,79 @@ public class PlayerCache {
     public int loginTries;
     public String lastIp;
     public long validUntil;
-    private static final JsonParser parser = new JsonParser();
+
+    public int lastDimId;
+    public double lastX;
+    public double lastY;
+    public double lastZ;
+
+    private static final Gson gson = new Gson();
 
 
-    public PlayerCache(String uuid, String ip) {
+    public PlayerCache(String uuid, ServerPlayerEntity player) {
-        this.wasAuthenticated = false;
+        if(db.isClosed())
-        this.loginTries = 0;
+            return;
-        this.lastIp = ip;
+
+        if(player != null) {
+            this.lastIp = player.getIp();
+
+            // Setting last coordinates
+            this.lastDimId = player.dimension.getRawId();
+            this.lastX = player.getX();
+            this.lastY = player.getY();
+            this.lastZ = player.getZ();
+        }
+        else {
+            this.lastIp = "";
+
+            // Setting last coordinates
+            this.lastDimId = config.worldSpawn.dimensionId;
+            this.lastX = config.worldSpawn.x;
+            this.lastY = config.worldSpawn.y;
+            this.lastZ = config.worldSpawn.z;
+        }
 
         if(db.isUserRegistered(uuid)) {
-            this.isRegistered = true;
+            String data = db.getData(uuid);
-            JsonObject json = parser.parse(db.getData(uuid)).getAsJsonObject();
+
+            // Getting (hashed) password
+            JsonObject json = gson.fromJson(data, JsonObject.class);
             this.password = json.get("password").getAsString();
+
+            // If coordinates are same as the one from world spawn
+            // we should check the DB for saved coords
+            if(config.main.spawnOnJoin) {
+                try {
+                    JsonElement lastLoc = json.get("lastLocation");
+                    if (
+                            lastLoc != null &&
+                            this.lastDimId == config.worldSpawn.dimensionId &&
+                            this.lastX == config.worldSpawn.x &&
+                            this.lastY == config.worldSpawn.y &&
+                            this.lastZ == config.worldSpawn.z
+                    ) {
+                        // Getting DB coords
+                        JsonObject lastLocation = gson.fromJson(lastLoc.getAsString(), JsonObject.class);
+                        this.lastDimId = lastLocation.get("dimId").getAsInt();
+                        this.lastX = lastLocation.get("x").getAsDouble();
+                        this.lastY = lastLocation.get("y").getAsDouble();
+                        this.lastZ = lastLocation.get("z").getAsDouble();
+
+                        // Removing location data from DB
+                        json.remove("lastLocation");
+                        db.updateUserData(uuid, json.toString());
+                    }
+                } catch (JsonSyntaxException ignored) {
+                    // Player didn't have any coords in db to tp to
+                }
+            }
+            this.isRegistered = true;
         }
         else {
             this.isRegistered = false;
             this.password = "";
         }
+        this.wasAuthenticated = false;
+        this.loginTries = 0;
     }
 }

src/main/java/org/samo_lego/simpleauth/storage/SimpleAuthDatabase.java

@@ -15,7 +15,7 @@ import static org.iq80.leveldb.impl.Iq80DBFactory.factory;
 
 public class SimpleAuthDatabase {
     private static final Logger LOGGER = LogManager.getLogger();
-    private DB levelDBStore;
+    public DB levelDBStore;
 
     // Connects to the DB
     public void openConnection() {
@@ -79,9 +79,9 @@ public class SimpleAuthDatabase {
     }
 
     // Updates the password of the user
-    public void updateUserData(String uuid, String password) {
+    public void updateUserData(String uuid, String data) {
         try {
-            levelDBStore.put(bytes("UUID:" + uuid),bytes("data:" + password));
+            levelDBStore.put(bytes("UUID:" + uuid), bytes("data:" + data));
         } catch (Error e) {
             LOGGER.error("[SimpleAuth] " + e.getMessage());
         }