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

@@ -12,7 +12,7 @@ public class AxiomConstants {
         }
     }
 
-    public static final int API_VERSION = 5;
+    public static final int API_VERSION = 6;
     public static final NamespacedKey ACTIVE_HOTBAR_INDEX = new NamespacedKey("axiom", "active_hotbar_index");
     public static final NamespacedKey HOTBAR_DATA = new NamespacedKey("axiom", "hotbar_data");
 

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

@@ -1,10 +1,17 @@
 package com.moulberry.axiom;
 
 import com.moulberry.axiom.buffer.CompressedBlockEntity;
+import com.moulberry.axiom.event.AxiomCreateWorldPropertiesEvent;
+import com.moulberry.axiom.event.AxiomTimeChangeEvent;
 import com.moulberry.axiom.packet.*;
+import com.moulberry.axiom.world_properties.WorldPropertyCategory;
+import com.moulberry.axiom.world_properties.WorldPropertyWidgetType;
+import com.moulberry.axiom.world_properties.server.ServerWorldPropertiesRegistry;
+import com.moulberry.axiom.world_properties.server.ServerWorldProperty;
 import io.netty.buffer.Unpooled;
 import io.netty.channel.Channel;
 import io.papermc.paper.event.player.PlayerFailMoveEvent;
+import io.papermc.paper.event.world.WorldGameRuleChangeEvent;
 import io.papermc.paper.network.ChannelInitializeListener;
 import io.papermc.paper.network.ChannelInitializeListenerHolder;
 import net.kyori.adventure.key.Key;
@@ -14,22 +21,34 @@ import net.minecraft.network.FriendlyByteBuf;
 import net.minecraft.network.protocol.Packet;
 import net.minecraft.network.protocol.PacketFlow;
 import net.minecraft.network.protocol.game.ServerboundCustomPayloadPacket;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.level.GameRules;
 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;
+import org.jetbrains.annotations.Nullable;
 
 import java.util.*;
 import java.util.concurrent.ConcurrentHashMap;
 
 public class AxiomPaper extends JavaPlugin implements Listener {
 
+    public static AxiomPaper PLUGIN; // tsk tsk tsk
+
+    public final Set<UUID> activeAxiomPlayers = Collections.newSetFromMap(new ConcurrentHashMap<>());
+
     @Override
     public void onEnable() {
+        PLUGIN = this;
+
         Bukkit.getPluginManager().registerEvents(this, this);
+        // Bukkit.getPluginManager().registerEvents(new WorldPropertiesExample(), this);
         CompressedBlockEntity.initialize(this);
 
         Messenger msg = Bukkit.getMessenger();
@@ -38,12 +57,15 @@ 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");
-
-        final Set<UUID> activeAxiomPlayers = Collections.newSetFromMap(new ConcurrentHashMap<>());
+        msg.registerOutgoingPluginChannel(this, "axiom:register_world_properties");
+        msg.registerOutgoingPluginChannel(this, "axiom:set_world_property");
+        msg.registerOutgoingPluginChannel(this, "axiom:ack_world_properties");
 
         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_world_time", new SetTimePacketListener());
+        msg.registerIncomingPluginChannel(this, "axiom:set_world_property", new SetWorldPropertyListener());
         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());
@@ -94,12 +116,76 @@ public class AxiomPaper extends JavaPlugin implements Listener {
         }, 20, 20);
     }
 
+    private final WeakHashMap<World, ServerWorldPropertiesRegistry> worldProperties = new WeakHashMap<>();
+
+    public @Nullable ServerWorldPropertiesRegistry getWorldProperties(World world) {
+        if (worldProperties.containsKey(world)) {
+            return worldProperties.get(world);
+        } else {
+            ServerWorldPropertiesRegistry properties = createWorldProperties(world);
+            worldProperties.put(world, properties);
+            return properties;
+        }
+    }
+
     @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);
         }
     }
 
+    @EventHandler
+    public void onChangedWorld(PlayerChangedWorldEvent event) {
+        World world = event.getPlayer().getWorld();
+
+        ServerWorldPropertiesRegistry properties = getWorldProperties(world);
+
+        if (properties == null) {
+            event.getPlayer().sendPluginMessage(this, "axiom:register_world_properties", new byte[]{0});
+        } else {
+            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 = getWorldProperties(world);
+
+            if (properties == null) {
+                player.sendPluginMessage(this, "axiom:register_world_properties", new byte[]{0});
+            } else {
+                properties.registerFor(this, player);
+            }
+        }, 20); // Why does this need to be delayed?
+    }
+
+    @EventHandler
+    public void onGameRuleChanged(WorldGameRuleChangeEvent event) {
+        if (event.getGameRule() == GameRule.DO_WEATHER_CYCLE) {
+            ServerWorldPropertiesRegistry properties = getWorldProperties(event.getWorld());
+            if (properties != null) {
+                ServerWorldProperty<?> property = properties.getById(new ResourceLocation("axiom:pause_weather"));
+                if (property != null) {
+                    ((ServerWorldProperty<Boolean>)property).setValue(event.getWorld(), !Boolean.parseBoolean(event.getValue()));
+                }
+            }
+        }
+    }
+
+    private ServerWorldPropertiesRegistry createWorldProperties(World world) {
+        ServerWorldPropertiesRegistry registry = new ServerWorldPropertiesRegistry(world);
+
+        AxiomCreateWorldPropertiesEvent createEvent = new AxiomCreateWorldPropertiesEvent(world, registry);
+        Bukkit.getPluginManager().callEvent(createEvent);
+        if (createEvent.isCancelled()) return null;
+
+        return registry;
+    }
+
 }

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

@@ -0,0 +1,55 @@
+package com.moulberry.axiom;
+
+import com.moulberry.axiom.event.AxiomCreateWorldPropertiesEvent;
+import com.moulberry.axiom.world_properties.WorldPropertyCategory;
+import com.moulberry.axiom.world_properties.WorldPropertyWidgetType;
+import com.moulberry.axiom.world_properties.server.ServerWorldProperty;
+import net.kyori.adventure.text.Component;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.util.Unit;
+import org.bukkit.World;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+
+import java.util.List;
+
+public class WorldPropertiesExample implements Listener {
+
+    @EventHandler
+    public void onCreateWorldProperties(AxiomCreateWorldPropertiesEvent event) {
+        WorldPropertyCategory category = new WorldPropertyCategory("Examples", false);
+
+        World world = event.getWorld();
+
+        ServerWorldProperty<Boolean> checkbox = new ServerWorldProperty<>(new ResourceLocation("axiom:checkbox"),
+            "Checkbox",
+            false, WorldPropertyWidgetType.CHECKBOX, false, bool -> {
+            world.sendMessage(Component.text("Checkbox: " + bool)); // Do something with input
+            return true; // true to sync with client
+        });
+
+        ServerWorldProperty<Integer> slider = new ServerWorldProperty<>(new ResourceLocation("axiom:slider"),
+            "Slider",
+            false, new WorldPropertyWidgetType.Slider(0, 8), 4, integer -> {
+            world.sendMessage(Component.text("Slider: " + integer)); // Do something with input
+            return true; // true to sync with client
+        });
+
+        ServerWorldProperty<String> textbox = new ServerWorldProperty<>(new ResourceLocation("axiom:textbox"),
+            "Textbox",
+            false, WorldPropertyWidgetType.TEXTBOX, "Hello", string -> {
+            world.sendMessage(Component.text("Textbox: " + string)); // Do something with input
+            return true; // true to sync with client
+        });
+
+        ServerWorldProperty<Unit> button = new ServerWorldProperty<>(new ResourceLocation("axiom:button"),
+            "Button",
+            false, WorldPropertyWidgetType.BUTTON, Unit.INSTANCE, unit -> {
+            world.sendMessage(Component.text("Button pressed")); // Do something with input
+            return true; // true to sync with client
+        });
+
+        event.addCategory(category, List.of(checkbox, slider, textbox, button));
+    }
+
+}

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

@@ -0,0 +1,56 @@
+package com.moulberry.axiom.event;
+
+import com.moulberry.axiom.world_properties.WorldPropertyCategory;
+import com.moulberry.axiom.world_properties.server.ServerWorldPropertiesRegistry;
+import com.moulberry.axiom.world_properties.server.ServerWorldProperty;
+import org.bukkit.World;
+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;
+
+import java.util.List;
+
+public class AxiomCreateWorldPropertiesEvent extends Event implements Cancellable {
+
+    private static final HandlerList HANDLERS = new HandlerList();
+
+    private final World world;
+    private final ServerWorldPropertiesRegistry registry;
+    private boolean cancelled = false;
+
+    public AxiomCreateWorldPropertiesEvent(World world, ServerWorldPropertiesRegistry registry) {
+        this.world = world;
+        this.registry = registry;
+    }
+
+    public World getWorld() {
+        return world;
+    }
+
+    public void addCategory(WorldPropertyCategory category, List<ServerWorldProperty<?>> properties) {
+        this.registry.addCategory(category, properties);
+    }
+
+    @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/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/integration/RegionProtection.java

@@ -4,6 +4,9 @@ import org.bukkit.Bukkit;
 import org.bukkit.World;
 import org.bukkit.entity.Player;
 
+import java.util.ArrayList;
+import java.util.List;
+
 public class RegionProtection {
 
     private final RegionProtectionWorldGuard worldGuard;
@@ -16,8 +19,17 @@ public class RegionProtection {
         }
     }
 
-    public boolean canBuildInSection(int cx, int cy, int cz) {
-        if (this.worldGuard != null && !this.worldGuard.canBuildInSection(cx, cy, cz)) return false;
+    public SectionProtection getSection(int cx, int cy, int cz) {
+        List<SectionProtection> protections = new ArrayList<>();
+        if (this.worldGuard != null) {
+            return this.worldGuard.getSection(cx, cy, cz);
+        }
+        // todo: PlotSquared
+        return SectionProtection.ALLOW;
+    }
+
+    public boolean canBuild(int x, int y, int z) {
+        if (this.worldGuard != null && !this.worldGuard.canBuild(x, y, z)) return false;
         // todo: PlotSquared
         return true;
     }

src/main/java/com/moulberry/axiom/integration/RegionProtectionWorldGuard.java

@@ -1,5 +1,7 @@
 package com.moulberry.axiom.integration;
 
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.Sets;
 import com.sk89q.worldedit.bukkit.BukkitAdapter;
 import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldguard.LocalPlayer;
@@ -7,16 +9,21 @@ import com.sk89q.worldguard.WorldGuard;
 import com.sk89q.worldguard.bukkit.WorldGuardPlugin;
 import com.sk89q.worldguard.internal.platform.WorldGuardPlatform;
 import com.sk89q.worldguard.protection.ApplicableRegionSet;
+import com.sk89q.worldguard.protection.FlagValueCalculator;
+import com.sk89q.worldguard.protection.association.RegionAssociable;
 import com.sk89q.worldguard.protection.flags.Flags;
+import com.sk89q.worldguard.protection.flags.RegionGroup;
+import com.sk89q.worldguard.protection.flags.StateFlag;
 import com.sk89q.worldguard.protection.managers.RegionManager;
-import com.sk89q.worldguard.protection.regions.ProtectedCuboidRegion;
-import com.sk89q.worldguard.protection.regions.ProtectedRegion;
-import com.sk89q.worldguard.protection.regions.RegionContainer;
-import com.sk89q.worldguard.protection.regions.RegionQuery;
+import com.sk89q.worldguard.protection.regions.*;
 import org.bukkit.World;
 import org.bukkit.entity.Player;
 import org.jetbrains.annotations.Nullable;
 
+import java.util.*;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
 public class RegionProtectionWorldGuard {
 
     private final LocalPlayer player;
@@ -32,12 +39,15 @@ public class RegionProtectionWorldGuard {
         WorldGuardPlatform platform = WorldGuard.getInstance().getPlatform();
 
         RegionContainer regionContainer = platform.getRegionContainer();
+        if (regionContainer == null) return null;
+
         com.sk89q.worldedit.world.World worldEditWorld = BukkitAdapter.adapt(world);
         LocalPlayer worldGuardPlayer = WorldGuardPlugin.inst().wrapPlayer(player);
 
         // Don't do any protection if player has bypass
         if (platform.getSessionManager().hasBypass(worldGuardPlayer, worldEditWorld)) {
-            return null;
+            // todo: enable bypass
+//            return null;
         }
 
         RegionManager regionManager = regionContainer.get(worldEditWorld);
@@ -46,12 +56,128 @@ public class RegionProtectionWorldGuard {
         return new RegionProtectionWorldGuard(worldGuardPlayer, regionManager);
     }
 
-    public boolean canBuildInSection(int cx, int cy, int cz) {
+    public SectionProtection getSection(int cx, int cy, int cz) {
         BlockVector3 min = BlockVector3.at(cx*16, cy*16, cz*16);
         BlockVector3 max = BlockVector3.at(cx*16+15, cy*16+15, cz*16+15);
         ProtectedRegion test = new ProtectedCuboidRegion("dummy", min, max);
         ApplicableRegionSet regions = this.regionManager.getApplicableRegions(test, RegionQuery.QueryOption.COMPUTE_PARENTS);
-        return regions.testState(this.player, Flags.BUILD);
+
+        int minimumPriority = Integer.MIN_VALUE;
+
+        Map<ProtectedRegion, StateFlag.State> consideredValues = new HashMap<>();
+        Set<ProtectedRegion> ignoredParents = new HashSet<>();
+
+        for (ProtectedRegion region : regions) {
+            int priority = FlagValueCalculator.getPriorityOf(region);
+
+            // todo: this logic doesn't work for us in determining ALLOW, DENY, CHECK
+            if (priority < minimumPriority) {
+                break;
+            }
+
+            // todo: have to keep track of 2 booleans: partialAllow & partialDeny
+
+            if (ignoredParents.contains(region)) {
+                continue;
+            }
+
+            StateFlag.State value = FlagValueCalculator.getEffectiveFlagOf(region, Flags.BUILD, this.player);
+            if (value != null) {
+                minimumPriority = priority;
+                consideredValues.put(region, value);
+            }
+
+            addParents(ignoredParents, region);
+
+            // The BUILD flag is implicitly set on every region where
+            // PASSTHROUGH is not set to ALLOW
+            if (minimumPriority != priority && Flags.BUILD.implicitlySetWithMembership() &&
+                    FlagValueCalculator.getEffectiveFlagOf(region, Flags.PASSTHROUGH, this.player) != StateFlag.State.ALLOW) {
+                minimumPriority = priority;
+            }
+        }
+
+        if (consideredValues.isEmpty()) {
+            if (Flags.BUILD.usesMembershipAsDefault()) {
+                // todo
+//                switch (getMembership(subject)) {
+//                    case FAIL:
+//                        return ImmutableList.of();
+//                    case SUCCESS:
+//                        return (Collection<V>) ImmutableList.of(StateFlag.State.ALLOW);
+//                }
+            }
+
+            System.out.println("returning default");
+            StateFlag.State fallback = Flags.BUILD.getDefault();
+            return fallback == StateFlag.State.DENY ? SectionProtection.DENY : SectionProtection.ALLOW;
+        }
+
+        boolean hasPartialDeny = false;
+        for (Map.Entry<ProtectedRegion, StateFlag.State> entry : consideredValues.entrySet()) {
+            ProtectedRegion region = entry.getKey();
+            if (entry.getValue() == StateFlag.State.DENY) {
+                System.out.println("found region with deny!");
+                if (region instanceof GlobalProtectedRegion) {
+                    return SectionProtection.DENY;
+                } else if (region instanceof ProtectedCuboidRegion && doesRegionCompletelyContainSection(region, cx, cy, cz)) {
+                    return SectionProtection.DENY;
+                }
+                hasPartialDeny = true;
+            }
+        }
+
+        if (hasPartialDeny) {
+            System.out.println("returning check!");
+            return new SectionProtection() {
+                @Override
+                public SectionState getSectionState() {
+                    return SectionState.CHECK;
+                }
+
+                @Override
+                public boolean check(int wx, int wy, int wz) {
+                    return true;
+                }
+            };
+            // return complex thing
+        }
+
+        System.out.println("returning allow!");
+        return SectionProtection.ALLOW;
+    }
+
+    private boolean doesRegionCompletelyContainSection(ProtectedRegion region, int cx, int cy, int cz) {
+        BlockVector3 regionMin = region.getMinimumPoint();
+
+        if (regionMin.getBlockX() > cx*16) return false;
+        if (regionMin.getBlockY() > cy*16) return false;
+        if (regionMin.getBlockZ() > cz*16) return false;
+
+        BlockVector3 regionMax = region.getMaximumPoint();
+
+        if (regionMax.getBlockX() < cx*16+15) return false;
+        if (regionMax.getBlockY() < cy*16+15) return false;
+        if (regionMax.getBlockZ() < cz*16+15) return false;
+
+        return true;
+    }
+
+    private void addParents(Set<ProtectedRegion> ignored, ProtectedRegion region) {
+        ProtectedRegion parent = region.getParent();
+
+        while (parent != null) {
+            ignored.add(parent);
+            parent = parent.getParent();
+        }
+    }
+
+    public boolean canBuild(int x, int y, int z) {
+        return this.regionManager.getApplicableRegions(BlockVector3.at(x, y, z)).testState(this.player, Flags.BUILD);
+    }
+
+    public boolean isAllowed(LocalPlayer player, ProtectedRegion protectedRegion) {
+        return protectedRegion.isOwner(player) || protectedRegion.isMember(player);
     }
 
 }

src/main/java/com/moulberry/axiom/integration/SectionProtection.java

@@ -0,0 +1,38 @@
+package com.moulberry.axiom.integration;
+
+public interface SectionProtection {
+
+    SectionProtection ALLOW = new SectionProtection() {
+        @Override
+        public SectionState getSectionState() {
+            return SectionState.ALLOW;
+        }
+
+        @Override
+        public boolean check(int wx, int wy, int wz) {
+            return true;
+        }
+    };
+
+    SectionProtection DENY = new SectionProtection() {
+        @Override
+        public SectionState getSectionState() {
+            return SectionState.DENY;
+        }
+
+        @Override
+        public boolean check(int wx, int wy, int wz) {
+            return false;
+        }
+    };
+
+    enum SectionState {
+        ALLOW,
+        DENY,
+        CHECK
+    }
+
+    SectionState getSectionState();
+    boolean check(int wx, int wy, int wz);
+
+}

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

@@ -60,7 +60,6 @@ public class HelloPacketListener implements PluginMessageListener {
         // Enable
         FriendlyByteBuf buf = new FriendlyByteBuf(Unpooled.buffer());
         buf.writeBoolean(true);
-        buf.writeByte(0); // todo: world properties
         buf.writeInt(handshakeEvent.getMaxBufferSize()); // Max Buffer Size
         buf.writeBoolean(false); // No source info
         buf.writeBoolean(false); // No source settings

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

@@ -6,6 +6,7 @@ import com.moulberry.axiom.buffer.BlockBuffer;
 import com.moulberry.axiom.buffer.CompressedBlockEntity;
 import com.moulberry.axiom.event.AxiomModifyWorldEvent;
 import com.moulberry.axiom.integration.RegionProtection;
+import com.moulberry.axiom.integration.SectionProtection;
 import com.sk89q.worldedit.bukkit.BukkitAdapter;
 import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.world.World;
@@ -38,6 +39,7 @@ import net.minecraft.world.level.ChunkPos;
 import net.minecraft.world.level.Level;
 import net.minecraft.world.level.biome.Biome;
 import net.minecraft.world.level.block.Block;
+import net.minecraft.world.level.block.Blocks;
 import net.minecraft.world.level.block.EntityBlock;
 import net.minecraft.world.level.block.entity.BlockEntity;
 import net.minecraft.world.level.block.state.BlockState;
@@ -135,9 +137,14 @@ public class SetBlockBufferPacketListener {
                     continue;
                 }
 
-                if (!regionProtection.canBuildInSection(cx, cy, cz)) {
-                    continue;
-                }
+                SectionProtection sectionProtection = regionProtection.getSection(cx, cy, cz);
+//                switch (sectionProtection.getSectionState()) {
+//                    case ALLOW -> sectionProtection = null;
+//                    case DENY -> {
+//                        continue;
+//                    }
+//                    case CHECK -> {}
+//                }
 
                 LevelChunk chunk = world.getChunk(cx, cz);
                 chunk.setUnsaved(true);
@@ -170,10 +177,20 @@ public class SetBlockBufferPacketListener {
                                 BlockState blockState = container.get(x, y, z);
                                 if (blockState == emptyState) continue;
 
+                                switch (sectionProtection.getSectionState()) {
+                                    case ALLOW -> {}
+                                    case DENY -> blockState = Blocks.REDSTONE_BLOCK.defaultBlockState();
+                                    case CHECK -> blockState = Blocks.DIAMOND_BLOCK.defaultBlockState();
+                                }
+
                                 int bx = cx*16 + x;
                                 int by = cy*16 + y;
                                 int bz = cz*16 + z;
 
+//                                if (!regionProtection.canBuild(bx, by, bz)) {
+//                                    continue;
+//                                }
+
                                 blockPos.set(bx, by, bz);
 
                                 if (hasOnlyAir && blockState.isAir()) {

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

@@ -8,6 +8,8 @@ import net.minecraft.core.SectionPos;
 import net.minecraft.network.FriendlyByteBuf;
 import net.minecraft.server.level.ServerLevel;
 import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.world.InteractionHand;
+import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.level.block.Block;
 import net.minecraft.world.level.block.EntityBlock;
 import net.minecraft.world.level.block.entity.BlockEntity;
@@ -16,9 +18,14 @@ import net.minecraft.world.level.chunk.LevelChunk;
 import net.minecraft.world.level.chunk.LevelChunkSection;
 import net.minecraft.world.level.levelgen.Heightmap;
 import net.minecraft.world.level.lighting.LightEngine;
+import net.minecraft.world.phys.BlockHitResult;
 import org.bukkit.Bukkit;
+import org.bukkit.block.BlockFace;
+import org.bukkit.craftbukkit.v1_20_R1.block.CraftBlock;
 import org.bukkit.craftbukkit.v1_20_R1.entity.CraftPlayer;
 import org.bukkit.entity.Player;
+import org.bukkit.event.block.Action;
+import org.bukkit.event.player.PlayerInteractEvent;
 import org.bukkit.plugin.messaging.PluginMessageListener;
 import org.jetbrains.annotations.NotNull;
 import xyz.jpenilla.reflectionremapper.ReflectionRemapper;
@@ -61,97 +68,130 @@ public class SetBlockPacketListener implements PluginMessageListener {
 
         // Read packet
         FriendlyByteBuf friendlyByteBuf = new FriendlyByteBuf(Unpooled.wrappedBuffer(message));
-        BlockPos blockPos = friendlyByteBuf.readBlockPos();
-        BlockState blockState = friendlyByteBuf.readById(Block.BLOCK_STATE_REGISTRY);
+        Map<BlockPos, BlockState> blocks = friendlyByteBuf.readMap(FriendlyByteBuf::readBlockPos, buf -> buf.readById(Block.BLOCK_STATE_REGISTRY));
         boolean updateNeighbors = friendlyByteBuf.readBoolean();
-        int sequenceId = friendlyByteBuf.readInt();
+
+        int reason = friendlyByteBuf.readVarInt();
+        boolean breaking = friendlyByteBuf.readBoolean();
+        BlockHitResult blockHit = friendlyByteBuf.readBlockHitResult();
+        InteractionHand hand = friendlyByteBuf.readEnum(InteractionHand.class);
+        int sequenceId = friendlyByteBuf.readVarInt();
 
         ServerPlayer player = ((CraftPlayer)bukkitPlayer).getHandle();
 
+        org.bukkit.inventory.ItemStack heldItem;
+        if (hand == InteractionHand.MAIN_HAND) {
+            heldItem = bukkitPlayer.getInventory().getItemInMainHand();
+        } else {
+            heldItem = bukkitPlayer.getInventory().getItemInOffHand();
+        }
+
+        org.bukkit.block.Block blockClicked = bukkitPlayer.getWorld().getBlockAt(blockHit.getBlockPos().getX(),
+            blockHit.getBlockPos().getY(), blockHit.getBlockPos().getZ());
+
+        BlockFace blockFace = CraftBlock.notchToBlockFace(blockHit.getDirection());
+
+        // Call interact event
+        PlayerInteractEvent playerInteractEvent = new PlayerInteractEvent(bukkitPlayer,
+            breaking ? Action.LEFT_CLICK_BLOCK : Action.RIGHT_CLICK_BLOCK, heldItem, blockClicked, blockFace);
+        if (!playerInteractEvent.callEvent()) {
+            if (sequenceId >= 0) {
+                player.connection.ackBlockChangesUpTo(sequenceId);
+            }
+            return;
+        }
+
         // Update blocks
         if (updateNeighbors) {
-            player.level().setBlock(blockPos, blockState, 3);
+            for (Map.Entry<BlockPos, BlockState> entry : blocks.entrySet()) {
+                player.level().setBlock(entry.getKey(), entry.getValue(), 3);
+            }
         } else {
-            int bx = blockPos.getX();
-            int by = blockPos.getY();
-            int bz = blockPos.getZ();
-            int x = bx & 0xF;
-            int y = by & 0xF;
-            int z = bz & 0xF;
-            int cx = bx >> 4;
-            int cy = by >> 4;
-            int cz = bz >> 4;
+            for (Map.Entry<BlockPos, BlockState> entry : blocks.entrySet()) {
+                BlockPos blockPos = entry.getKey();
+                BlockState blockState = entry.getValue();
 
-            ServerLevel level = player.serverLevel();
-            LevelChunk chunk = level.getChunk(cx, cz);
-            chunk.setUnsaved(true);
+                int bx = blockPos.getX();
+                int by = blockPos.getY();
+                int bz = blockPos.getZ();
+                int x = bx & 0xF;
+                int y = by & 0xF;
+                int z = bz & 0xF;
+                int cx = bx >> 4;
+                int cy = by >> 4;
+                int cz = bz >> 4;
 
-            LevelChunkSection section = chunk.getSection(level.getSectionIndexFromSectionY(cy));
-            boolean hasOnlyAir = section.hasOnlyAir();
+                ServerLevel level = player.serverLevel();
+                LevelChunk chunk = level.getChunk(cx, cz);
+                chunk.setUnsaved(true);
 
-            Heightmap worldSurface = null;
-            Heightmap oceanFloor = null;
-            Heightmap motionBlocking = null;
-            Heightmap motionBlockingNoLeaves = null;
-            for (Map.Entry<Heightmap.Types, Heightmap> heightmap : chunk.getHeightmaps()) {
-                switch (heightmap.getKey()) {
-                    case WORLD_SURFACE -> worldSurface = heightmap.getValue();
-                    case OCEAN_FLOOR -> oceanFloor = heightmap.getValue();
-                    case MOTION_BLOCKING -> motionBlocking = heightmap.getValue();
-                    case MOTION_BLOCKING_NO_LEAVES -> motionBlockingNoLeaves = heightmap.getValue();
-                    default -> {}
-                }
-            }
+                LevelChunkSection section = chunk.getSection(level.getSectionIndexFromSectionY(cy));
+                boolean hasOnlyAir = section.hasOnlyAir();
 
-            BlockState old = section.setBlockState(x, y, z, blockState, false);
-            if (blockState != old) {
-                Block block = blockState.getBlock();
-                motionBlocking.update(x, by, z, blockState);
-                motionBlockingNoLeaves.update(x, by, z, blockState);
-                oceanFloor.update(x, by, z, blockState);
-                worldSurface.update(x, by, z, blockState);
-
-                if (blockState.hasBlockEntity()) {
-                    BlockEntity blockEntity = chunk.getBlockEntity(blockPos, LevelChunk.EntityCreationType.CHECK);
-
-                    if (blockEntity == null) {
-                        // There isn't a block entity here, create it!
-                        blockEntity = ((EntityBlock)block).newBlockEntity(blockPos, blockState);
-                        if (blockEntity != null) {
-                            chunk.addAndRegisterBlockEntity(blockEntity);
-                        }
-                    } else if (blockEntity.getType().isValid(blockState)) {
-                        // Block entity is here and the type is correct
-                        // Just update the state and ticker and move on
-                        blockEntity.setBlockState(blockState);
-
-                        try {
-                            this.updateBlockEntityTicker.invoke(chunk, blockEntity);
-                        } catch (IllegalAccessException | InvocationTargetException e) {
-                            throw new RuntimeException(e);
-                        }
-                    } else {
-                        // Block entity type isn't correct, we need to recreate it
-                        chunk.removeBlockEntity(blockPos);
-
-                        blockEntity = ((EntityBlock)block).newBlockEntity(blockPos, blockState);
-                        if (blockEntity != null) {
-                            chunk.addAndRegisterBlockEntity(blockEntity);
-                        }
+                Heightmap worldSurface = null;
+                Heightmap oceanFloor = null;
+                Heightmap motionBlocking = null;
+                Heightmap motionBlockingNoLeaves = null;
+                for (Map.Entry<Heightmap.Types, Heightmap> heightmap : chunk.getHeightmaps()) {
+                    switch (heightmap.getKey()) {
+                        case WORLD_SURFACE -> worldSurface = heightmap.getValue();
+                        case OCEAN_FLOOR -> oceanFloor = heightmap.getValue();
+                        case MOTION_BLOCKING -> motionBlocking = heightmap.getValue();
+                        case MOTION_BLOCKING_NO_LEAVES -> motionBlockingNoLeaves = heightmap.getValue();
+                        default -> {}
                     }
-                } else if (old.hasBlockEntity()) {
-                    chunk.removeBlockEntity(blockPos);
                 }
 
-                level.getChunkSource().blockChanged(blockPos);
-                if (LightEngine.hasDifferentLightProperties(chunk, blockPos, old, blockState)) {
-                    level.getChunkSource().getLightEngine().checkBlock(blockPos);
-                }
-            }
+                BlockState old = section.setBlockState(x, y, z, blockState, false);
+                if (blockState != old) {
+                    Block block = blockState.getBlock();
+                    motionBlocking.update(x, by, z, blockState);
+                    motionBlockingNoLeaves.update(x, by, z, blockState);
+                    oceanFloor.update(x, by, z, blockState);
+                    worldSurface.update(x, by, z, blockState);
 
-            boolean nowHasOnlyAir = section.hasOnlyAir();
-            if (hasOnlyAir != nowHasOnlyAir) {
-                level.getChunkSource().getLightEngine().updateSectionStatus(SectionPos.of(cx, cy, cz), nowHasOnlyAir);
+                    if (blockState.hasBlockEntity()) {
+                        BlockEntity blockEntity = chunk.getBlockEntity(blockPos, LevelChunk.EntityCreationType.CHECK);
+
+                        if (blockEntity == null) {
+                            // There isn't a block entity here, create it!
+                            blockEntity = ((EntityBlock)block).newBlockEntity(blockPos, blockState);
+                            if (blockEntity != null) {
+                                chunk.addAndRegisterBlockEntity(blockEntity);
+                            }
+                        } else if (blockEntity.getType().isValid(blockState)) {
+                            // Block entity is here and the type is correct
+                            // Just update the state and ticker and move on
+                            blockEntity.setBlockState(blockState);
+
+                            try {
+                                this.updateBlockEntityTicker.invoke(chunk, blockEntity);
+                            } catch (IllegalAccessException | InvocationTargetException e) {
+                                throw new RuntimeException(e);
+                            }
+                        } else {
+                            // Block entity type isn't correct, we need to recreate it
+                            chunk.removeBlockEntity(blockPos);
+
+                            blockEntity = ((EntityBlock)block).newBlockEntity(blockPos, blockState);
+                            if (blockEntity != null) {
+                                chunk.addAndRegisterBlockEntity(blockEntity);
+                            }
+                        }
+                    } else if (old.hasBlockEntity()) {
+                        chunk.removeBlockEntity(blockPos);
+                    }
+
+                    level.getChunkSource().blockChanged(blockPos);
+                    if (LightEngine.hasDifferentLightProperties(chunk, blockPos, old, blockState)) {
+                        level.getChunkSource().getLightEngine().checkBlock(blockPos);
+                    }
+                }
+
+                boolean nowHasOnlyAir = section.hasOnlyAir();
+                if (hasOnlyAir != nowHasOnlyAir) {
+                    level.getChunkSource().getLightEngine().updateSectionStatus(SectionPos.of(cx, cy, cz), nowHasOnlyAir);
+                }
             }
         }
 

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 +1,45 @@
+package com.moulberry.axiom.packet;
+
+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.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);
+        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/packet/SetWorldPropertyListener.java

@@ -0,0 +1,53 @@
+package com.moulberry.axiom.packet;
+
+import com.moulberry.axiom.AxiomPaper;
+import com.moulberry.axiom.event.AxiomTimeChangeEvent;
+import com.moulberry.axiom.world_properties.WorldPropertyCategory;
+import com.moulberry.axiom.world_properties.server.ServerWorldPropertiesRegistry;
+import com.moulberry.axiom.world_properties.server.ServerWorldProperty;
+import io.netty.buffer.Unpooled;
+import net.minecraft.core.registries.Registries;
+import net.minecraft.network.FriendlyByteBuf;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.resources.ResourceLocation;
+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.entity.Player;
+import org.bukkit.plugin.messaging.PluginMessageListener;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+import java.util.Map;
+
+public class SetWorldPropertyListener 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));
+        ResourceLocation id = friendlyByteBuf.readResourceLocation();
+        int type = friendlyByteBuf.readVarInt();
+        byte[] data = friendlyByteBuf.readByteArray();
+        int updateId = friendlyByteBuf.readVarInt();
+
+        ServerWorldPropertiesRegistry registry = AxiomPaper.PLUGIN.getWorldProperties(player.getWorld());
+        if (registry == null) return;
+
+        ServerWorldProperty<?> property = registry.getById(id);
+        if (property != null && property.getType().getTypeId() == type) {
+            property.update(player.getWorld(), data);
+        }
+
+        FriendlyByteBuf buf = new FriendlyByteBuf(Unpooled.buffer());
+        buf.writeVarInt(updateId);
+        player.sendPluginMessage(AxiomPaper.PLUGIN, "axiom:ack_world_properties",
+            buf.accessByteBufWithCorrectSize());
+    }
+
+}

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 +1,129 @@
+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.util.Unit;
+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);
+        }
+    };
+
+    public static WorldPropertyDataType<Unit> EMPTY = new WorldPropertyDataType<>() {
+        @Override
+        public int getTypeId() {
+            return 5;
+        }
+
+        @Override
+        public byte[] serialize(Unit value) {
+            return new byte[0];
+        }
+
+        @Override
+        public Unit deserialize(byte[] bytes) {
+            return Unit.INSTANCE;
+        }
+    };
+
+}

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

@@ -0,0 +1,90 @@
+package com.moulberry.axiom.world_properties;
+
+import net.minecraft.network.FriendlyByteBuf;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.util.Unit;
+
+import java.util.List;
+
+public interface WorldPropertyWidgetType<T> {
+
+    WorldPropertyDataType<T> dataType();
+    void write(FriendlyByteBuf friendlyByteBuf);
+
+    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);
+        }
+    };
+
+
+    WorldPropertyWidgetType<Unit> BUTTON = new WorldPropertyWidgetType<>() {
+        @Override
+        public WorldPropertyDataType<Unit> dataType() {
+            return WorldPropertyDataType.EMPTY;
+        }
+
+        @Override
+        public void write(FriendlyByteBuf friendlyByteBuf) {
+            friendlyByteBuf.writeVarInt(4);
+        }
+    };
+
+    record ButtonArray(List<String> otherButtons) implements WorldPropertyWidgetType<Integer> {
+        @Override
+        public WorldPropertyDataType<Integer> dataType() {
+            return WorldPropertyDataType.INTEGER;
+        }
+
+        @Override
+        public void write(FriendlyByteBuf friendlyByteBuf) {
+            friendlyByteBuf.writeVarInt(5);
+            friendlyByteBuf.writeCollection(this.otherButtons, FriendlyByteBuf::writeUtf);
+        }
+    }
+
+}

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

@@ -0,0 +1,102 @@
+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 net.minecraft.world.level.GameRules;
+import org.bukkit.GameRule;
+import org.bukkit.World;
+import org.bukkit.craftbukkit.v1_20_R1.CraftWorld;
+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(World world) {
+        this.registerDefault(world);
+    }
+
+    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(World world) {
+        ServerLevel serverLevel = ((CraftWorld)world).getHandle();
+
+        // 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));
+
+        // Weather
+        WorldPropertyCategory weatherCategory = new WorldPropertyCategory("axiom.editorui.window.world_properties.weather",
+            true);
+
+        ServerWorldProperty<Boolean> pauseWeather = new ServerWorldProperty<>(new ResourceLocation("axiom:pause_weather"),
+            "axiom.editorui.window.world_properties.pause_weather",
+            true, WorldPropertyWidgetType.CHECKBOX, !world.getGameRuleValue(GameRule.DO_WEATHER_CYCLE), bool -> {
+            world.setGameRule(GameRule.DO_WEATHER_CYCLE, !bool);
+            return false;
+        });
+
+        ServerWorldProperty<Integer> weatherType = new ServerWorldProperty<>(new ResourceLocation("axiom:weather_type"),
+            "axiom.editorui.window.world_properties.clear_weather",
+            true, new WorldPropertyWidgetType.ButtonArray(
+            List.of("axiom.editorui.window.world_properties.rain_weather", "axiom.editorui.window.world_properties.thunder_weather")
+        ), 0, index -> {
+            if (index == 0) {
+                serverLevel.setWeatherParameters(ServerLevel.RAIN_DELAY.sample(serverLevel.random), 0, false, false);
+            } else if (index == 1) {
+                serverLevel.setWeatherParameters(0, ServerLevel.RAIN_DURATION.sample(serverLevel.random), true, false);
+            } else if (index == 2) {
+                serverLevel.setWeatherParameters(0, ServerLevel.THUNDER_DURATION.sample(serverLevel.random), true, true);
+            }
+            return false;
+        });
+
+        this.addCategory(weatherCategory, List.of(pauseWeather, weatherType));
+    }
+
+}

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

@@ -0,0 +1,80 @@
+package com.moulberry.axiom.world_properties.server;
+
+import com.moulberry.axiom.AxiomPaper;
+import com.moulberry.axiom.world_properties.WorldPropertyDataType;
+import com.moulberry.axiom.world_properties.WorldPropertyWidgetType;
+import io.netty.buffer.Unpooled;
+import net.minecraft.network.FriendlyByteBuf;
+import net.minecraft.resources.ResourceLocation;
+import org.bukkit.World;
+import org.bukkit.entity.Player;
+
+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(World world, byte[] data) {
+        this.value = this.widget.dataType().deserialize(data);
+        if (this.handler.test(this.value)) {
+            this.sync(world);
+        }
+    }
+
+    public void setValueWithoutSyncing(T value) {
+        this.value = value;
+    }
+
+    public void setValue(World world, T value) {
+        this.value = value;
+        this.sync(world);
+    }
+
+    public void sync(World world) {
+        FriendlyByteBuf buf = new FriendlyByteBuf(Unpooled.buffer());
+
+        buf.writeResourceLocation(this.id);
+        buf.writeVarInt(this.widget.dataType().getTypeId());
+        buf.writeByteArray(this.widget.dataType().serialize(this.value));
+
+        byte[] message = buf.accessByteBufWithCorrectSize();
+        for (Player player : world.getPlayers()) {
+            if (AxiomPaper.PLUGIN.activeAxiomPlayers.contains(player.getUniqueId())) {
+                player.sendPluginMessage(AxiomPaper.PLUGIN, "axiom:set_world_property", message);
+            }
+        }
+    }
+
+    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));
+    }
+
+}