feat: /botall spawn list一键召唤名单内所有假人

spawn <prefix> <count>生成prefix1~prefixN；kill移除名单内假人。createBot改为public供复用。

src/main/java/com/github/zly2006/carpetslsaddition/ServerMain.java

@@ -2,7 +2,9 @@ package com.github.zly2006.carpetslsaddition;
 
 import carpet.CarpetExtension;
 import carpet.CarpetServer;
+import com.github.zly2006.carpetslsaddition.command.BotAllCommand;
 import com.github.zly2006.carpetslsaddition.command.BotCommand;
+import com.github.zly2006.carpetslsaddition.command.BotListCommand;
 import com.github.zly2006.carpetslsaddition.command.HatCommand;
 import com.github.zly2006.carpetslsaddition.command.SitCommand;
 import com.google.common.collect.Maps;
@@ -81,6 +83,8 @@ public class ServerMain implements ModInitializer, CarpetExtension {
             HatCommand.register(dispatcher);
             SitCommand.register(dispatcher);
             BotCommand.register(dispatcher);
+            BotAllCommand.register(dispatcher);
+            BotListCommand.register(dispatcher);
             LOGGER.info("[SLSA] commands registered: hat/sit/bot");
         } catch (Throwable t) {
             LOGGER.error("[SLSA] failed to register commands", t);

src/main/java/com/github/zly2006/carpetslsaddition/command/BotAllCommand.java

@@ -0,0 +1,234 @@
+package com.github.zly2006.carpetslsaddition.command;
+
+import carpet.fakes.ServerPlayerInterface;
+import carpet.helpers.EntityPlayerActionPack;
+import carpet.patches.EntityPlayerMPFake;
+import com.github.zly2006.carpetslsaddition.SLSCarpetSettings;
+import com.github.zly2006.carpetslsaddition.util.access.SLSBotAccessor;
+import com.mojang.brigadier.CommandDispatcher;
+import com.mojang.brigadier.arguments.IntegerArgumentType;
+import com.mojang.brigadier.builder.LiteralArgumentBuilder;
+import com.mojang.brigadier.context.CommandContext;
+import net.minecraft.commands.CommandSourceStack;
+import net.minecraft.commands.Commands;
+import net.minecraft.commands.arguments.coordinates.RotationArgument;
+import net.minecraft.commands.arguments.coordinates.Vec3Argument;
+import net.minecraft.core.Direction;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.level.ServerPlayer;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.function.Consumer;
+
+import static net.minecraft.commands.Commands.argument;
+import static net.minecraft.commands.Commands.literal;
+
+/**
+ * /botall —— 批量控制本模组生成的所有假人。
+ *
+ * <p>与 {@link BotCommand} 的区别：{@code /bot <player>} 操作单个指定玩家，
+ * 而 {@code /botall} 对其余命令中出现的所有本模组假人（isBot()==true）批量执行同一操作。
+ */
+public class BotAllCommand {
+
+    public static void register(CommandDispatcher<CommandSourceStack> dispatcher) {
+        LiteralArgumentBuilder<CommandSourceStack> command = literal("botall")
+                .requires(source -> Commands.LEVEL_OWNERS.check(source.permissions()) || me.lucko.fabric.api.permissions.v0.Permissions.check(source, "slsaddition.command.bot"))
+                .then(literal("stop").executes(batch(EntityPlayerActionPack::stopAll)))
+                .then(actionCommand("use", EntityPlayerActionPack.ActionType.USE))
+                .then(actionCommand("jump", EntityPlayerActionPack.ActionType.JUMP))
+                .then(actionCommand("attack", EntityPlayerActionPack.ActionType.ATTACK))
+                .then(actionCommand("drop", EntityPlayerActionPack.ActionType.DROP_ITEM))
+                .then(dropCommand("dropStack", true))
+                .then(actionCommand("swapHands", EntityPlayerActionPack.ActionType.SWAP_HANDS))
+                .then(literal("hotbar").then(argument("slot", IntegerArgumentType.integer(1, 9))
+                        .executes(c -> batchAp(c, ap -> ap.setSlot(IntegerArgumentType.getInteger(c, "slot"))))))
+                .then(literal("mount").executes(batch(ap -> ap.mount(true)))
+                        .then(literal("anything").executes(batch(ap -> ap.mount(false)))))
+                .then(literal("dismount").executes(batch(EntityPlayerActionPack::dismount)))
+                .then(literal("sneak").executes(batch(ap -> ap.setSneaking(true))))
+                .then(literal("unsneak").executes(batch(ap -> ap.setSneaking(false))))
+                .then(literal("sprint").executes(batch(ap -> ap.setSprinting(true))))
+                .then(literal("unsprint").executes(batch(ap -> ap.setSprinting(false))))
+                .then(literal("look")
+                        .then(literal("north").executes(batch(ap -> ap.look(Direction.NORTH))))
+                        .then(literal("south").executes(batch(ap -> ap.look(Direction.SOUTH))))
+                        .then(literal("east").executes(batch(ap -> ap.look(Direction.EAST))))
+                        .then(literal("west").executes(batch(ap -> ap.look(Direction.WEST))))
+                        .then(literal("up").executes(batch(ap -> ap.look(Direction.UP))))
+                        .then(literal("down").executes(batch(ap -> ap.look(Direction.DOWN))))
+                        .then(literal("at").then(argument("position", Vec3Argument.vec3())
+                                .executes(c -> batchAp(c, ap -> ap.lookAt(Vec3Argument.getVec3(c, "position"))))))
+                        .then(argument("direction", RotationArgument.rotation())
+                                .executes(c -> batchAp(c, ap -> ap.look(RotationArgument.getRotation(c, "direction").getRotation(c.getSource()))))))
+                .then(literal("turn")
+                        .then(literal("left").executes(batch(ap -> ap.turn(-90, 0))))
+                        .then(literal("right").executes(batch(ap -> ap.turn(90, 0))))
+                        .then(literal("back").executes(batch(ap -> ap.turn(180, 0))))
+                        .then(argument("rotation", RotationArgument.rotation())
+                                .executes(c -> batchAp(c, ap -> ap.turn(RotationArgument.getRotation(c, "rotation").getRotation(c.getSource()))))))
+                .then(literal("move").executes(batch(EntityPlayerActionPack::stopMovement))
+                        .then(literal("forward").executes(batch(ap -> ap.setForward(1))))
+                        .then(literal("backward").executes(batch(ap -> ap.setForward(-1))))
+                        .then(literal("left").executes(batch(ap -> ap.setStrafing(1))))
+                        .then(literal("right").executes(batch(ap -> ap.setStrafing(-1)))))
+                .then(literal("sit").executes(BotAllCommand::sitAll))
+                .then(literal("stand").executes(BotAllCommand::standAll))
+                .then(literal("spawn")
+                        .then(literal("list").executes(BotAllCommand::spawnFromList))
+                        .then(argument("prefix", com.mojang.brigadier.arguments.StringArgumentType.word())
+                                .then(argument("count", IntegerArgumentType.integer(1, 1000))
+                                        .executes(BotAllCommand::spawnBatch))))
+                .then(literal("kill").executes(BotAllCommand::killBatch));
+        dispatcher.register(command);
+    }
+
+    private static LiteralArgumentBuilder<CommandSourceStack> actionCommand(String name, EntityPlayerActionPack.ActionType type) {
+        return literal(name)
+                .executes(batch(ap -> ap.start(type, EntityPlayerActionPack.Action.once())))
+                .then(literal("once").executes(batch(ap -> ap.start(type, EntityPlayerActionPack.Action.once()))))
+                .then(literal("continuous").executes(batch(ap -> ap.start(type, EntityPlayerActionPack.Action.continuous()))))
+                .then(literal("interval").then(argument("ticks", IntegerArgumentType.integer(1))
+                        .executes(c -> batchAp(c, ap -> ap.start(type, EntityPlayerActionPack.Action.interval(IntegerArgumentType.getInteger(c, "ticks")))))));
+    }
+
+    private static LiteralArgumentBuilder<CommandSourceStack> dropCommand(String name, boolean dropAll) {
+        return literal(name)
+                .then(literal("all").executes(batch(ap -> ap.drop(-2, dropAll))))
+                .then(literal("mainhand").executes(batch(ap -> ap.drop(-1, dropAll))))
+                .then(literal("offhand").executes(batch(ap -> ap.drop(40, dropAll))))
+                .then(argument("slot", IntegerArgumentType.integer(0, 40))
+                        .executes(c -> batchAp(c, ap -> ap.drop(IntegerArgumentType.getInteger(c, "slot"), dropAll))));
+    }
+
+    /** 批量执行一个 action pack 操作。 */
+    private static int batchAp(CommandContext<CommandSourceStack> context, Consumer<EntityPlayerActionPack> action) {
+        List<ServerPlayer> bots = collectBots(context.getSource());
+        for (ServerPlayer bot : bots) {
+            action.accept(((ServerPlayerInterface) bot).getActionPack());
+        }
+        final int n = bots.size();
+        context.getSource().sendSuccess(
+                () -> net.minecraft.network.chat.Component.literal("[SLSA] 已对 " + n + " 个假人执行操作"), false);
+        return n;
+    }
+
+    private static com.mojang.brigadier.Command<CommandSourceStack> batch(Consumer<EntityPlayerActionPack> action) {
+        return c -> batchAp(c, action);
+    }
+
+    /** 收集所有本模组生成的假人（受名单限制：名单非空时只取名单内的）。 */
+    private static List<ServerPlayer> collectBots(CommandSourceStack source) {
+        MinecraftServer server = source.getServer();
+        List<ServerPlayer> bots = new ArrayList<>();
+        boolean filterByList = !com.github.zly2006.carpetslsaddition.util.BotListManager.isEmpty();
+        for (ServerPlayer player : server.getPlayerList().getPlayers()) {
+            if (player instanceof EntityPlayerMPFake && ((SLSBotAccessor) player).carpet_SLS_Addition$isBot()) {
+                if (filterByList && !com.github.zly2006.carpetslsaddition.util.BotListManager.contains(player.getScoreboardName())) {
+                    continue;
+                }
+                bots.add(player);
+            }
+        }
+        return bots;
+    }
+    private static int sitAll(CommandContext<CommandSourceStack> context) {
+        if (!SLSCarpetSettings.canUseSitCommand) {
+            context.getSource().sendSuccess(() -> net.minecraft.network.chat.Component.literal(
+                    "[SLSA] 坐下功能未启用（canUseSitCommand）"), false);
+            return 0;
+        }
+        List<ServerPlayer> bots = collectBots(context.getSource());
+        int ok = 0;
+        for (ServerPlayer bot : bots) {
+            if (SitCommand.sitPlayer(bot)) ok++;
+        }
+        final int done = ok;
+        context.getSource().sendSuccess(() -> net.minecraft.network.chat.Component.literal(
+                "[SLSA] 已让 " + done + "/" + bots.size() + " 个假人坐下"), false);
+        return ok;
+    }
+
+    private static int standAll(CommandContext<CommandSourceStack> context) {
+        List<ServerPlayer> bots = collectBots(context.getSource());
+        int ok = 0;
+        for (ServerPlayer bot : bots) {
+            if (bot.getVehicle() != null) {
+                bot.stopRiding();
+                ok++;
+            }
+        }
+        final int done = ok;
+        context.getSource().sendSuccess(() -> net.minecraft.network.chat.Component.literal(
+                "[SLSA] 已让 " + done + "/" + bots.size() + " 个假人站起"), false);
+        return ok;
+    }
+
+    /** 一键召唤名单里的所有假人（执行者位置）。 */
+    private static int spawnFromList(CommandContext<CommandSourceStack> context) {
+        CommandSourceStack source = context.getSource();
+        java.util.Set<String> names = com.github.zly2006.carpetslsaddition.util.BotListManager.getNames();
+        if (names.isEmpty()) {
+            source.sendSuccess(() -> net.minecraft.network.chat.Component.literal(
+                    "[SLSA] 名单为空，先用 /botlist add 添加名字"), false);
+            return 0;
+        }
+        net.minecraft.world.phys.Vec3 pos = source.getPosition();
+        net.minecraft.world.phys.Vec2 rot = source.getRotation();
+        net.minecraft.resources.ResourceKey<net.minecraft.world.level.Level> dim = source.getLevel().dimension();
+        int ok = 0;
+        for (String name : names) {
+            // 已在线的跳过
+            if (source.getServer().getPlayerList().getPlayerByName(name) != null) continue;
+            try {
+                var bot = BotCommand.createBot(name, source.getServer(), pos, rot.y, rot.x, dim);
+                if (bot != null) ok++;
+            } catch (Throwable t) {
+                com.github.zly2006.carpetslsaddition.ServerMain.LOGGER.warn("[SLSA] spawn list bot {} failed: {}", name, t.toString());
+            }
+        }
+        final int done = ok;
+        source.sendSuccess(() -> net.minecraft.network.chat.Component.literal(
+                "[SLSA] 已召唤名单中的 " + done + "/" + names.size() + " 个假人"), false);
+        return ok;
+    }
+
+    /** 批量召唤：生成 前缀1 ~ 前缀N。 */
+    private static int spawnBatch(CommandContext<CommandSourceStack> context) {
+        CommandSourceStack source = context.getSource();
+        String prefix = com.mojang.brigadier.arguments.StringArgumentType.getString(context, "prefix");
+        int count = IntegerArgumentType.getInteger(context, "count");
+        net.minecraft.world.phys.Vec3 pos = source.getPosition();
+        net.minecraft.world.phys.Vec2 rot = source.getRotation();
+        net.minecraft.resources.ResourceKey<net.minecraft.world.level.Level> dim = source.getLevel().dimension();
+        int ok = 0;
+        for (int i = 1; i <= count; i++) {
+            String name = prefix + i;
+            try {
+                var bot = BotCommand.createBot(name, source.getServer(), pos, rot.y, rot.x, dim);
+                if (bot != null) ok++;
+            } catch (Throwable t) {
+                com.github.zly2006.carpetslsaddition.ServerMain.LOGGER.warn("[SLSA] spawn bot {} failed: {}", name, t.toString());
+            }
+        }
+        final int done = ok;
+        source.sendSuccess(() -> net.minecraft.network.chat.Component.literal(
+                "[SLSA] 已召唤 " + done + "/" + count + " 个假人（前缀 " + prefix + "）"), false);
+        return ok;
+    }
+
+    /** 批量移除：杀死受名单限制的假人（名单空则全部）。 */
+    private static int killBatch(CommandContext<CommandSourceStack> context) {
+        List<ServerPlayer> bots = collectBots(context.getSource());
+        int ok = 0;
+        for (ServerPlayer bot : bots) {
+            bot.kill((net.minecraft.server.level.ServerLevel) bot.level());
+            ok++;
+        }
+        final int done = ok;
+        context.getSource().sendSuccess(() -> net.minecraft.network.chat.Component.literal(
+                "[SLSA] 已移除 " + done + " 个假人"), false);
+        return ok;
+    }
+}

src/main/java/com/github/zly2006/carpetslsaddition/command/BotCommand.java

@@ -352,7 +352,7 @@ public class BotCommand {
     }
 
     @SuppressWarnings("unchecked")
-    private static EntityPlayerMPFake createBot(String username, MinecraftServer server, Vec3 pos, double yaw, double pitch, ResourceKey<Level> dimensionId) {
+    public static EntityPlayerMPFake createBot(String username, MinecraftServer server, Vec3 pos, double yaw, double pitch, ResourceKey<Level> dimensionId) {
         ServerLevel worldIn = server.getLevel(dimensionId);
         server.services().nameToIdCache().resolveOfflineUsers(false);
         GameProfile gameprofile;

src/main/java/com/github/zly2006/carpetslsaddition/command/BotListCommand.java

@@ -0,0 +1,100 @@
+package com.github.zly2006.carpetslsaddition.command;
+
+import carpet.patches.EntityPlayerMPFake;
+import com.github.zly2006.carpetslsaddition.util.BotListManager;
+import com.github.zly2006.carpetslsaddition.util.access.SLSBotAccessor;
+import com.mojang.brigadier.CommandDispatcher;
+import com.mojang.brigadier.arguments.StringArgumentType;
+import com.mojang.brigadier.builder.LiteralArgumentBuilder;
+import net.minecraft.commands.CommandSourceStack;
+import net.minecraft.commands.Commands;
+import net.minecraft.network.chat.Component;
+import net.minecraft.server.level.ServerPlayer;
+
+import java.util.Set;
+
+import static net.minecraft.commands.Commands.argument;
+import static net.minecraft.commands.Commands.literal;
+
+/**
+ * /botlist —— 维护"受控假人名单"，供 /botall 限定操作范围。
+ *
+ * <p>名单持久化在 config/slsa-bot-list.json，重启保留。
+ */
+public class BotListCommand {
+
+    public static void register(CommandDispatcher<CommandSourceStack> dispatcher) {
+        LiteralArgumentBuilder<CommandSourceStack> command = literal("botlist")
+                .requires(source -> Commands.LEVEL_OWNERS.check(source.permissions())
+                        || me.lucko.fabric.api.permissions.v0.Permissions.check(source, "slsaddition.command.bot"))
+                .then(literal("show").executes(BotListCommand::show))
+                .then(literal("clear").executes(c -> {
+                    BotListManager.clear();
+                    c.getSource().sendSuccess(() -> Component.literal("[SLSA] 已清空假人名单"), false);
+                    return 1;
+                }))
+                .then(literal("add")
+                        .then(argument("names", StringArgumentType.greedyString())
+                                .executes(c -> add(c.getSource(), StringArgumentType.getString(c, "names")))))
+                .then(literal("remove")
+                        .then(argument("names", StringArgumentType.greedyString())
+                                .executes(c -> remove(c.getSource(), StringArgumentType.getString(c, "names")))))
+                .then(literal("addall").executes(BotListCommand::addAll));
+        dispatcher.register(command);
+    }
+
+    private static int show(com.mojang.brigadier.context.CommandContext<CommandSourceStack> c) {
+        Set<String> names = BotListManager.getNames();
+        if (names.isEmpty()) {
+            c.getSource().sendSuccess(() -> Component.literal("[SLSA] 假人名单为空（此时 /botall 操作所有假人）"), false);
+        } else {
+            c.getSource().sendSuccess(() -> Component.literal(
+                    "[SLSA] 假人名单（" + names.size() + "）：" + String.join(", ", names)), false);
+        }
+        return names.size();
+    }
+
+    private static int add(CommandSourceStack source, String raw) {
+        String[] parts = raw.trim().split("\\s+");
+        int n = 0;
+        for (String p : parts) {
+            if (!p.isEmpty() && BotListManager.add(p)) {
+                n++;
+            }
+        }
+        final int added = n;
+        source.sendSuccess(() -> Component.literal(
+                "[SLSA] 已添加 " + added + " 个名字，名单共 " + BotListManager.getNames().size() + " 个"), false);
+        return n;
+    }
+
+    private static int remove(CommandSourceStack source, String raw) {
+        String[] parts = raw.trim().split("\\s+");
+        int n = 0;
+        for (String p : parts) {
+            if (!p.isEmpty() && BotListManager.remove(p)) {
+                n++;
+            }
+        }
+        final int removed = n;
+        source.sendSuccess(() -> Component.literal(
+                "[SLSA] 已移除 " + removed + " 个名字，名单共 " + BotListManager.getNames().size() + " 个"), false);
+        return n;
+    }
+
+    /** 把当前所有在线 SLS 假人加入名单。 */
+    private static int addAll(com.mojang.brigadier.context.CommandContext<CommandSourceStack> c) {
+        int n = 0;
+        for (ServerPlayer player : c.getSource().getServer().getPlayerList().getPlayers()) {
+            if (player instanceof EntityPlayerMPFake && ((SLSBotAccessor) player).carpet_SLS_Addition$isBot()) {
+                if (BotListManager.add(player.getScoreboardName())) {
+                    n++;
+                }
+            }
+        }
+        final int added = n;
+        c.getSource().sendSuccess(() -> Component.literal(
+                "[SLSA] 已把 " + added + " 个在线假人加入名单，名单共 " + BotListManager.getNames().size() + " 个"), false);
+        return n;
+    }
+}

src/main/java/com/github/zly2006/carpetslsaddition/command/SitCommand.java

@@ -20,21 +20,27 @@ public class SitCommand {
                     if (player == null) {
                         return 0;
                     }
-
-                    if (player.getVehicle() != null || !player.onGround()) {  // 防止错误的坐下行为
-                        return 1;
-                    }
-
-                    ServerLevel world = (ServerLevel) player.level();
-
-                    ArmorStand armorStandEntity = new ArmorStand(world, player.getX(), player.getY(), player.getZ());
-                    ((SitEntity) armorStandEntity).setSitEntity(true);
-                    world.addFreshEntity(armorStandEntity);
-                    player.setShiftKeyDown(false);
-                    player.startRiding(armorStandEntity);
-
+                    sitPlayer(player);
                     return 1;
                 })
         );
     }
+
+    /**
+     * 让指定玩家原地坐下（生成一个标记为 SitEntity 的 ArmorStand 并骑乘）。
+     *
+     * @return 若成功坐下返回 true，否则返回 false（如已在骑乘/不在地面）。
+     */
+    public static boolean sitPlayer(ServerPlayer player) {
+        if (player.getVehicle() != null || !player.onGround()) {  // 防止错误的坐下行为
+            return false;
+        }
+        ServerLevel world = (ServerLevel) player.level();
+        ArmorStand armorStandEntity = new ArmorStand(world, player.getX(), player.getY(), player.getZ());
+        ((SitEntity) armorStandEntity).setSitEntity(true);
+        world.addFreshEntity(armorStandEntity);
+        player.setShiftKeyDown(false);
+        player.startRiding(armorStandEntity);
+        return true;
+    }
 }

src/main/java/com/github/zly2006/carpetslsaddition/util/BotListManager.java

@@ -0,0 +1,101 @@
+package com.github.zly2006.carpetslsaddition.util;
+
+import com.github.zly2006.carpetslsaddition.ServerMain;
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.reflect.TypeToken;
+import net.fabricmc.loader.api.FabricLoader;
+
+import java.io.IOException;
+import java.io.Reader;
+import java.io.Writer;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.LinkedHashSet;
+import java.util.Set;
+
+/**
+ * 假人名单管理器：维护一份"受控假人名字"列表，持久化到 config/slsa-bot-list.json。
+ *
+ * <p>用途：{@code /botlist add cute wazi} 把名字加入名单后，{@code /botall} 的操作范围
+ * 就限定为名单内的假人（名单为空时操作所有 SLS 假人）。
+ */
+public final class BotListManager {
+
+    private BotListManager() {}
+
+    private static final Gson GSON = new GsonBuilder().setPrettyPrinting().create();
+
+    /** 名字列表（保序、去重）。 */
+    private static final Set<String> NAMES = new LinkedHashSet<>();
+
+    private static Path configPath;
+
+    private static Path path() {
+        if (configPath == null) {
+            configPath = FabricLoader.getInstance().getConfigDir().resolve("slsa-bot-list.json");
+        }
+        return configPath;
+    }
+
+    /** 加载名单（服务器启动时调用）。 */
+    public static void load() {
+        NAMES.clear();
+        Path p = path();
+        if (!Files.exists(p)) {
+            return;
+        }
+        try (Reader r = Files.newBufferedReader(p)) {
+            Set<String> loaded = GSON.fromJson(r, new TypeToken<LinkedHashSet<String>>() {}.getType());
+            if (loaded != null) {
+                NAMES.addAll(loaded);
+            }
+            ServerMain.LOGGER.info("[SLSA] loaded bot list: {} entries", NAMES.size());
+        } catch (Exception e) {
+            ServerMain.LOGGER.error("[SLSA] failed to load bot list", e);
+        }
+    }
+
+    /** 保存名单。 */
+    public static void save() {
+        Path p = path();
+        try {
+            Files.createDirectories(p.getParent());
+            try (Writer w = Files.newBufferedWriter(p)) {
+                GSON.toJson(NAMES, w);
+            }
+        } catch (IOException e) {
+            ServerMain.LOGGER.error("[SLSA] failed to save bot list", e);
+        }
+    }
+
+    public static boolean add(String name) {
+        boolean added = NAMES.add(name);
+        if (added) save();
+        return added;
+    }
+
+    public static boolean remove(String name) {
+        boolean removed = NAMES.remove(name);
+        if (removed) save();
+        return removed;
+    }
+
+    public static void clear() {
+        NAMES.clear();
+        save();
+    }
+
+    /** 返回名单快照。 */
+    public static Set<String> getNames() {
+        return new LinkedHashSet<>(NAMES);
+    }
+
+    public static boolean contains(String name) {
+        return NAMES.contains(name);
+    }
+
+    public static boolean isEmpty() {
+        return NAMES.isEmpty();
+    }
+}