Added scale change listener

common/src/main/java/me/lojosho/hibiscuscommons/packets/PacketInterface.java

@@ -37,6 +37,11 @@ public interface PacketInterface {
         // Override
     }
 
+    default PacketAction readPlayerScale(@NotNull Player player, @NotNull PlayerScaleWrapper wrapper) {
+        return PacketAction.NOTHING;
+        // Override
+    }
+
     default PacketAction readEntityHandle(@NotNull Player player, @NotNull PlayerInteractWrapper wrapper) {
         return PacketAction.NOTHING;
         // Override

common/src/main/java/me/lojosho/hibiscuscommons/packets/wrapper/PlayerScaleWrapper.java

@@ -0,0 +1,13 @@
+package me.lojosho.hibiscuscommons.packets.wrapper;
+
+import lombok.Getter;
+
+public class PlayerScaleWrapper {
+
+    @Getter
+    private final double scale;
+
+    public PlayerScaleWrapper(double scale) {
+        this.scale = scale;
+    }
+}

v1_21_R5/src/main/java/me/lojosho/hibiscuscommons/nms/v1_21_R5/NMSPacketChannel.java

@@ -12,6 +12,7 @@ import me.lojosho.hibiscuscommons.plugins.SubPlugins;
 import me.lojosho.hibiscuscommons.util.MessagesUtil;
 import net.minecraft.network.protocol.Packet;
 import net.minecraft.network.protocol.game.*;
+import net.minecraft.world.entity.ai.attributes.Attributes;
 import net.minecraft.world.inventory.ClickType;
 import net.minecraft.world.item.ItemStack;
 import org.bukkit.craftbukkit.CraftEquipmentSlot;
@@ -45,6 +46,7 @@ public class NMSPacketChannel extends ChannelDuplexHandler {
             case ClientboundContainerSetSlotPacket setSlotPacket -> msg = handleSlotChange(setSlotPacket);
             case ClientboundSetEquipmentPacket equipmentPacket -> msg = handlePlayerEquipment(equipmentPacket);
             case ClientboundSetPassengersPacket passengerPacket -> msg = handlePassengerSet(passengerPacket);
+            case ClientboundUpdateAttributesPacket attributesPacket -> msg = handleScaleChange(attributesPacket);
             default -> {}
         }
 
@@ -168,6 +170,30 @@ public class NMSPacketChannel extends ChannelDuplexHandler {
         return (Packet<?>) NMSHandlers.getHandler().getPacketHandler().createMountPacket(ownerId, passengers.stream().mapToInt(Integer::intValue).toArray());
     }
 
+    private Packet<?> handleScaleChange(@NotNull ClientboundUpdateAttributesPacket packet) {
+        final List<ClientboundUpdateAttributesPacket.AttributeSnapshot> nmsAttributes = packet.getValues();
+        final ClientboundUpdateAttributesPacket.AttributeSnapshot nmsScaleAttribute = nmsAttributes.stream()
+            .filter(attribute -> attribute.attribute().equals(Attributes.SCALE))
+            .findFirst()
+            .orElse(null);
+
+        if (nmsScaleAttribute == null) {
+            return packet;
+        }
+
+        AtomicReference<PacketAction> action = new AtomicReference<>(PacketAction.NOTHING);
+        PlayerScaleWrapper wrapper = new PlayerScaleWrapper(nmsScaleAttribute.base());
+
+        SubPlugins.getSubPlugins().forEach(plugin -> {
+            PacketAction pluginAction = plugin.getPacketInterface().readPlayerScale(player, wrapper);
+            if (pluginAction != PacketAction.NOTHING) action.set(pluginAction);
+        });
+
+        if (action.get() == PacketAction.CANCELLED) return null;
+        if (action.get() == PacketAction.NOTHING) return packet;
+        return packet;
+    }
+
     @Override
     public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
         if (!(msg instanceof Packet packet)) {