src/main/java/com/moulberry/axiom/AxiomPaper.java

@@ -2,6 +2,7 @@ package com.moulberry.axiom;
 
 import com.moulberry.axiom.buffer.CompressedBlockEntity;
 import com.moulberry.axiom.packet.*;
+import com.moulberry.axiom.world_properties.server.ServerWorldPropertiesRegistry;
 import io.netty.buffer.Unpooled;
 import io.netty.channel.Channel;
 import io.papermc.paper.event.player.PlayerFailMoveEvent;
@@ -18,6 +19,8 @@ import org.bukkit.*;
 import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerChangedWorldEvent;
+import org.bukkit.event.player.PlayerJoinEvent;
 import org.bukkit.plugin.java.JavaPlugin;
 import org.bukkit.plugin.messaging.Messenger;
 import org.checkerframework.checker.nullness.qual.NonNull;
@@ -38,12 +41,14 @@ public class AxiomPaper extends JavaPlugin implements Listener {
         msg.registerOutgoingPluginChannel(this, "axiom:initialize_hotbars");
         msg.registerOutgoingPluginChannel(this, "axiom:set_editor_views");
         msg.registerOutgoingPluginChannel(this, "axiom:block_entities");
+        msg.registerOutgoingPluginChannel(this, "axiom:register_world_properties");
 
         final Set<UUID> activeAxiomPlayers = Collections.newSetFromMap(new ConcurrentHashMap<>());
 
         msg.registerIncomingPluginChannel(this, "axiom:hello", new HelloPacketListener(this, activeAxiomPlayers));
         msg.registerIncomingPluginChannel(this, "axiom:set_gamemode", new SetGamemodePacketListener());
         msg.registerIncomingPluginChannel(this, "axiom:set_fly_speed", new SetFlySpeedPacketListener());
+        msg.registerIncomingPluginChannel(this, "axiom:set_time", new SetTimePacketListener());
         msg.registerIncomingPluginChannel(this, "axiom:set_block", new SetBlockPacketListener(this));
         msg.registerIncomingPluginChannel(this, "axiom:set_hotbar_slot", new SetHotbarSlotPacketListener());
         msg.registerIncomingPluginChannel(this, "axiom:switch_active_hotbar", new SwitchActiveHotbarPacketListener());
@@ -97,9 +102,30 @@ public class AxiomPaper extends JavaPlugin implements Listener {
     @EventHandler
     public void onFailMove(PlayerFailMoveEvent event) {
         if (event.getPlayer().hasPermission("axiom.*") &&
-                event.getFailReason() == PlayerFailMoveEvent.FailReason.MOVED_TOO_QUICKLY) {
+            event.getFailReason() == PlayerFailMoveEvent.FailReason.MOVED_TOO_QUICKLY) {
             event.setAllowed(true);
         }
     }
 
+    private final WeakHashMap<World, ServerWorldPropertiesRegistry> worldProperties = new WeakHashMap<>();
+
+    @EventHandler
+    public void onChangedWorld(PlayerChangedWorldEvent event) {
+        System.out.println("Changed world!");
+
+        World world = event.getPlayer().getWorld();
+        ServerWorldPropertiesRegistry properties = worldProperties.computeIfAbsent(world, k -> new ServerWorldPropertiesRegistry());
+        properties.registerFor(this, event.getPlayer());
+    }
+
+    @EventHandler
+    public void onJoin(PlayerJoinEvent event) {
+        Player player = event.getPlayer();
+        Bukkit.getScheduler().scheduleSyncDelayedTask(this, () -> {
+            World world = player.getWorld();
+            ServerWorldPropertiesRegistry properties = worldProperties.computeIfAbsent(world, k -> new ServerWorldPropertiesRegistry());
+            properties.registerFor(this, player);
+        }, 20); // Why does this need to be delayed?
+    }
+
 }

src/main/java/com/moulberry/axiom/event/AxiomTimeChangeEvent.java

@@ -0,0 +1,56 @@
+package com.moulberry.axiom.event;
+
+import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.Event;
+import org.bukkit.event.HandlerList;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+public class AxiomTimeChangeEvent extends Event implements Cancellable {
+
+    private static final HandlerList HANDLERS = new HandlerList();
+
+    private final Player player;
+    private final @Nullable Integer time;
+    private final @Nullable Boolean freezeTime;
+    private boolean cancelled = false;
+
+    public AxiomTimeChangeEvent(Player player, @Nullable Integer time, @Nullable Boolean freezeTime) {
+        this.player = player;
+        this.time = time;
+        this.freezeTime = freezeTime;
+    }
+
+    public @Nullable Integer getTime() {
+        return time;
+    }
+
+    public @Nullable Boolean isFreezeTime() {
+        return freezeTime;
+    }
+
+    public Player getPlayer() {
+        return this.player;
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return this.cancelled;
+    }
+
+    @Override
+    public void setCancelled(boolean cancel) {
+        this.cancelled = cancel;
+    }
+
+    public static HandlerList getHandlerList() {
+        return HANDLERS;
+    }
+
+    @Override
+    public @NotNull HandlerList getHandlers() {
+        return HANDLERS;
+    }
+
+}

src/main/java/com/moulberry/axiom/packet/SetFlySpeedPacketListener.java

@@ -20,7 +20,6 @@ public class SetFlySpeedPacketListener implements PluginMessageListener {
             return;
         }
 
-
         FriendlyByteBuf friendlyByteBuf = new FriendlyByteBuf(Unpooled.wrappedBuffer(message));
         float flySpeed = friendlyByteBuf.readFloat();
 

src/main/java/com/moulberry/axiom/packet/SetTimePacketListener.java

@@ -0,0 +1,47 @@
+package com.moulberry.axiom.packet;
+
+import com.moulberry.axiom.event.AxiomFlySpeedChangeEvent;
+import com.moulberry.axiom.event.AxiomTimeChangeEvent;
+import io.netty.buffer.Unpooled;
+import net.minecraft.core.registries.Registries;
+import net.minecraft.network.FriendlyByteBuf;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.level.GameRules;
+import net.minecraft.world.level.Level;
+import org.bukkit.Bukkit;
+import org.bukkit.craftbukkit.v1_20_R1.CraftWorld;
+import org.bukkit.craftbukkit.v1_20_R1.entity.CraftPlayer;
+import org.bukkit.entity.Player;
+import org.bukkit.plugin.messaging.PluginMessageListener;
+import org.jetbrains.annotations.NotNull;
+
+public class SetTimePacketListener implements PluginMessageListener {
+
+    @Override
+    public void onPluginMessageReceived(@NotNull String channel, @NotNull Player player, @NotNull byte[] message) {
+        if (!player.hasPermission("axiom.*")) {
+            return;
+        }
+
+        FriendlyByteBuf friendlyByteBuf = new FriendlyByteBuf(Unpooled.wrappedBuffer(message));
+        ResourceKey<Level> key = friendlyByteBuf.readResourceKey(Registries.DIMENSION); // Ignore
+        Integer time = friendlyByteBuf.readNullable(FriendlyByteBuf::readInt);
+        Boolean freezeTime = friendlyByteBuf.readNullable(FriendlyByteBuf::readBoolean);
+
+        if (time == null && freezeTime == null) return;
+
+        ServerLevel level = ((CraftWorld)player.getWorld()).getHandle();
+        if (!level.dimension().equals(key)) return;
+
+        // Call event
+        AxiomTimeChangeEvent timeChangeEvent = new AxiomTimeChangeEvent(player, time, freezeTime);
+        Bukkit.getPluginManager().callEvent(timeChangeEvent);
+        if (timeChangeEvent.isCancelled()) return;
+
+        // Change time
+        if (time != null) level.setDayTime(time);
+        if (freezeTime != null) level.getGameRules().getRule(GameRules.RULE_DAYLIGHT).set(!freezeTime, null);
+    }
+
+}

src/main/java/com/moulberry/axiom/world_properties/WorldPropertyCategory.java

@@ -0,0 +1,19 @@
+package com.moulberry.axiom.world_properties;
+
+import net.minecraft.network.FriendlyByteBuf;
+
+public record WorldPropertyCategory(String name, boolean localizeName) {
+
+    public void write(FriendlyByteBuf friendlyByteBuf) {
+        friendlyByteBuf.writeUtf(this.name);
+        friendlyByteBuf.writeBoolean(this.localizeName);
+    }
+
+    public static WorldPropertyCategory read(FriendlyByteBuf friendlyByteBuf) {
+        return new WorldPropertyCategory(
+            friendlyByteBuf.readUtf(),
+            friendlyByteBuf.readBoolean()
+        );
+    }
+
+}

src/main/java/com/moulberry/axiom/world_properties/WorldPropertyDataType.java

@@ -0,0 +1,111 @@
+package com.moulberry.axiom.world_properties;
+
+import io.netty.buffer.Unpooled;
+import net.minecraft.core.registries.BuiltInRegistries;
+import net.minecraft.network.FriendlyByteBuf;
+import net.minecraft.world.item.Item;
+import net.minecraft.world.level.block.Block;
+
+import java.nio.charset.StandardCharsets;
+
+public abstract class WorldPropertyDataType<T> {
+
+    public abstract int getTypeId();
+    public abstract byte[] serialize(T value);
+    public abstract T deserialize(byte[] bytes);
+
+    public static WorldPropertyDataType<Boolean> BOOLEAN = new WorldPropertyDataType<>() {
+        @Override
+        public int getTypeId() {
+            return 0;
+        }
+
+        @Override
+        public byte[] serialize(Boolean value) {
+            return new byte[] { value ? (byte)1 : (byte)0 };
+        }
+
+        @Override
+        public Boolean deserialize(byte[] bytes) {
+            return bytes[0] != 0;
+        }
+    };
+
+    public static WorldPropertyDataType<Integer> INTEGER = new WorldPropertyDataType<>() {
+        @Override
+        public int getTypeId() {
+            return 1;
+        }
+
+        @Override
+        public byte[] serialize(Integer value) {
+            FriendlyByteBuf buf = new FriendlyByteBuf(Unpooled.buffer(8));
+            buf.writeVarInt(value);
+            return buf.accessByteBufWithCorrectSize();
+        }
+
+        @Override
+        public Integer deserialize(byte[] bytes) {
+            FriendlyByteBuf buf = new FriendlyByteBuf(Unpooled.wrappedBuffer(bytes));
+            return buf.readVarInt();
+        }
+    };
+
+    public static WorldPropertyDataType<String> STRING = new WorldPropertyDataType<>() {
+        @Override
+        public int getTypeId() {
+            return 2;
+        }
+
+        @Override
+        public byte[] serialize(String value) {
+            return value.getBytes(StandardCharsets.UTF_8);
+        }
+
+        @Override
+        public String deserialize(byte[] bytes) {
+            return new String(bytes, StandardCharsets.UTF_8);
+        }
+    };
+
+    public static WorldPropertyDataType<Item> ITEM = new WorldPropertyDataType<>() {
+        @Override
+        public int getTypeId() {
+            return 3;
+        }
+
+        @Override
+        public byte[] serialize(Item value) {
+            FriendlyByteBuf buf = new FriendlyByteBuf(Unpooled.buffer(8));
+            buf.writeId(BuiltInRegistries.ITEM, value);
+            return buf.accessByteBufWithCorrectSize();
+        }
+
+        @Override
+        public Item deserialize(byte[] bytes) {
+            FriendlyByteBuf buf = new FriendlyByteBuf(Unpooled.wrappedBuffer(bytes));
+            return buf.readById(BuiltInRegistries.ITEM);
+        }
+    };
+
+    public static WorldPropertyDataType<Block> BLOCK = new WorldPropertyDataType<>() {
+        @Override
+        public int getTypeId() {
+            return 4;
+        }
+
+        @Override
+        public byte[] serialize(Block value) {
+            FriendlyByteBuf buf = new FriendlyByteBuf(Unpooled.buffer(8));
+            buf.writeId(BuiltInRegistries.BLOCK, value);
+            return buf.accessByteBufWithCorrectSize();
+        }
+
+        @Override
+        public Block deserialize(byte[] bytes) {
+            FriendlyByteBuf buf = new FriendlyByteBuf(Unpooled.wrappedBuffer(bytes));
+            return buf.readById(BuiltInRegistries.BLOCK);
+        }
+    };
+
+}

src/main/java/com/moulberry/axiom/world_properties/WorldPropertyWidgetType.java

@@ -0,0 +1,71 @@
+package com.moulberry.axiom.world_properties;
+
+import net.minecraft.network.FriendlyByteBuf;
+
+public interface WorldPropertyWidgetType<T> {
+
+    WorldPropertyDataType<T> dataType();
+    void write(FriendlyByteBuf friendlyByteBuf);
+
+    static WorldPropertyWidgetType<?> read(FriendlyByteBuf friendlyByteBuf) {
+        int type = friendlyByteBuf.readVarInt();
+        return switch (type) {
+            case 0 -> CHECKBOX;
+            case 1 -> new Slider(friendlyByteBuf.readInt(), friendlyByteBuf.readInt());
+            case 2 -> TEXTBOX;
+            case 3 -> TIME;
+            default -> throw new RuntimeException("Unknown widget type: " + type);
+        };
+    }
+
+    WorldPropertyWidgetType<Boolean> CHECKBOX = new WorldPropertyWidgetType<>() {
+        @Override
+        public WorldPropertyDataType<Boolean> dataType() {
+            return WorldPropertyDataType.BOOLEAN;
+        }
+
+        @Override
+        public void write(FriendlyByteBuf friendlyByteBuf) {
+            friendlyByteBuf.writeVarInt(0);
+        }
+    };
+
+    record Slider(int min, int max) implements WorldPropertyWidgetType<Integer> {
+        @Override
+        public WorldPropertyDataType<Integer> dataType() {
+            return WorldPropertyDataType.INTEGER;
+        }
+
+        @Override
+        public void write(FriendlyByteBuf friendlyByteBuf) {
+            friendlyByteBuf.writeVarInt(1);
+            friendlyByteBuf.writeInt(this.min);
+            friendlyByteBuf.writeInt(this.max);
+        }
+    }
+
+    WorldPropertyWidgetType<String> TEXTBOX = new WorldPropertyWidgetType<>() {
+        @Override
+        public WorldPropertyDataType<String> dataType() {
+            return WorldPropertyDataType.STRING;
+        }
+
+        @Override
+        public void write(FriendlyByteBuf friendlyByteBuf) {
+            friendlyByteBuf.writeVarInt(2);
+        }
+    };
+
+    WorldPropertyWidgetType<Integer> TIME = new WorldPropertyWidgetType<>() {
+        @Override
+        public WorldPropertyDataType<Integer> dataType() {
+            return WorldPropertyDataType.INTEGER;
+        }
+
+        @Override
+        public void write(FriendlyByteBuf friendlyByteBuf) {
+            friendlyByteBuf.writeVarInt(3);
+        }
+    };
+
+}

src/main/java/com/moulberry/axiom/world_properties/server/ServerWorldPropertiesRegistry.java

@@ -0,0 +1,68 @@
+package com.moulberry.axiom.world_properties.server;
+
+import com.moulberry.axiom.world_properties.WorldPropertyCategory;
+import com.moulberry.axiom.world_properties.WorldPropertyWidgetType;
+import io.netty.buffer.Unpooled;
+import net.minecraft.network.FriendlyByteBuf;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.server.level.ServerLevel;
+import org.bukkit.entity.Player;
+import org.bukkit.plugin.Plugin;
+
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+public class ServerWorldPropertiesRegistry {
+
+    private final LinkedHashMap<WorldPropertyCategory, List<ServerWorldProperty<?>>> propertyList = new LinkedHashMap<>();
+    private final Map<ResourceLocation, ServerWorldProperty<?>> propertyMap = new HashMap<>();
+
+    public ServerWorldPropertiesRegistry() {
+        this.registerDefault();
+    }
+
+    public ServerWorldProperty<?> getById(ResourceLocation resourceLocation) {
+        return propertyMap.get(resourceLocation);
+    }
+
+    public void addCategory(WorldPropertyCategory category, List<ServerWorldProperty<?>> properties) {
+        this.propertyList.put(category, properties);
+
+        for (ServerWorldProperty<?> property : properties) {
+            ResourceLocation id = property.getId();
+            if (this.propertyMap.containsKey(id)) {
+                throw new RuntimeException("Duplicate property: " + id);
+            }
+            this.propertyMap.put(id, property);
+        }
+    }
+
+    public void registerFor(Plugin plugin, Player bukkitPlayer) {
+        FriendlyByteBuf buf = new FriendlyByteBuf(Unpooled.buffer());
+
+        buf.writeVarInt(this.propertyList.size());
+
+        for (Map.Entry<WorldPropertyCategory, List<ServerWorldProperty<?>>> entry : this.propertyList.entrySet()) {
+            entry.getKey().write(buf);
+            buf.writeCollection(entry.getValue(), (buffer, p) -> p.write(buffer));
+        }
+
+        bukkitPlayer.sendPluginMessage(plugin, "axiom:register_world_properties",
+            buf.accessByteBufWithCorrectSize());
+    }
+
+    public void registerDefault() {
+        // Time
+        WorldPropertyCategory timeCategory = new WorldPropertyCategory("axiom.editorui.window.world_properties.time", true);
+
+        ServerWorldProperty<Integer> time = new ServerWorldProperty<>(new ResourceLocation("axiom:time"),
+            "axiom.editorui.window.world_properties.time",
+            true, WorldPropertyWidgetType.TIME, 0, integer -> false
+        );
+
+        this.addCategory(timeCategory, List.of(time));
+    }
+
+}

src/main/java/com/moulberry/axiom/world_properties/server/ServerWorldProperty.java

@@ -0,0 +1,63 @@
+package com.moulberry.axiom.world_properties.server;
+
+import com.moulberry.axiom.world_properties.WorldPropertyDataType;
+import com.moulberry.axiom.world_properties.WorldPropertyWidgetType;
+import net.minecraft.network.FriendlyByteBuf;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.server.level.ServerPlayer;
+
+import java.util.function.Predicate;
+
+public class ServerWorldProperty<T> {
+
+    private final ResourceLocation id;
+    private final String name;
+    private final boolean localizeName;
+    private WorldPropertyWidgetType<T> widget;
+    private T value;
+    private Predicate<T> handler;
+
+    public ServerWorldProperty(ResourceLocation id, String name, boolean localizeName, WorldPropertyWidgetType<T> widget,
+            T value, Predicate<T> handler) {
+        this.id = id;
+        this.name = name;
+        this.localizeName = localizeName;
+        this.widget = widget;
+        this.value = value;
+        this.handler = handler;
+    }
+
+    public ResourceLocation getId() {
+        return this.id;
+    }
+
+    public WorldPropertyDataType<T> getType() {
+        return this.widget.dataType();
+    }
+
+    public void update(ServerLevel serverLevel, byte[] data) {
+        this.value = this.widget.dataType().deserialize(data);
+        if (this.handler.test(this.value)) {
+//            AxiomClientboundSetWorldProperty packet = new AxiomClientboundSetWorldProperty(this.id,
+//                this.widget.dataType().getTypeId(), this.widget.dataType().serialize(this.value));
+
+//            for (ServerPlayer player : serverLevel.players()) {
+//                if (player.hasPermissions(2)) packet.send(player);
+//            }
+        }
+    }
+
+    public void setValue(T value) {
+        this.value = value;
+    }
+
+    public void write(FriendlyByteBuf friendlyByteBuf) {
+        friendlyByteBuf.writeResourceLocation(this.id);
+        friendlyByteBuf.writeUtf(this.name);
+        friendlyByteBuf.writeBoolean(this.localizeName);
+        this.widget.write(friendlyByteBuf);
+        friendlyByteBuf.writeByteArray(this.widget.dataType().serialize(this.value));
+    }
+
+}