added basic frost walker mechanic to boats

craftattack/src/main/java/eu/mhsl/craftattack/spawn/craftattack/appliances/gameplay/frostWalkerBoat/BoatMoveListener.java

@@ -0,0 +1,52 @@
+package eu.mhsl.craftattack.spawn.craftattack.appliances.gameplay.frostWalkerBoat;
+
+import eu.mhsl.craftattack.spawn.core.appliance.ApplianceListener;
+import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.block.Block;
+import org.bukkit.block.BlockFace;
+import org.bukkit.block.data.Levelled;
+import org.bukkit.entity.Boat;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.vehicle.VehicleMoveEvent;
+import org.bukkit.util.Vector;
+
+class BoatMoveListener extends ApplianceListener<FrostWalkerBoat> {
+    @EventHandler
+    public void onBoatMove(VehicleMoveEvent event) {
+        if(!(event.getVehicle() instanceof Boat boat)) return;
+
+//        if(!event.getVehicle().getPersistentDataContainer().has(
+//            this.getAppliance().getNamespacedKey(),
+//            PersistentDataType.BOOLEAN)
+//        ) return;
+//
+//        if(Boolean.FALSE.equals(event.getVehicle().getPersistentDataContainer().get(
+//            this.getAppliance().getNamespacedKey(),
+//            PersistentDataType.BOOLEAN
+//        ))) return;
+
+        Block blockAtBoat = event.getTo().getBlock();
+
+        if(blockAtBoat.getType() == Material.WATER) {
+            if (!(blockAtBoat.getBlockData() instanceof Levelled waterData)) return;
+            if (waterData.getLevel() != 0) return;
+            if (!blockAtBoat.getRelative(BlockFace.UP).isEmpty()) return;
+
+            Location teleportLocation = event.getTo().clone();
+            teleportLocation.setY(blockAtBoat.getY()+1.1);
+            boat.teleport(teleportLocation);
+        }
+
+        Vector velocity = event.getTo().toVector().subtract(event.getFrom().toVector());
+        velocity.setY(0);
+        Block iceTargetBlock;
+        if(velocity.isZero()) {
+            iceTargetBlock = event.getTo().getBlock().getRelative(BlockFace.DOWN);
+        } else {
+            Location iceTargetLocation = blockAtBoat.getLocation().clone().add(velocity.clone().normalize().multiply(5));
+            iceTargetBlock = iceTargetLocation.getBlock().getRelative(BlockFace.DOWN);
+        }
+        this.getAppliance().freezeWater(iceTargetBlock);
+    }
+}

craftattack/src/main/java/eu/mhsl/craftattack/spawn/craftattack/appliances/gameplay/frostWalkerBoat/FrostWalkerBoat.java

@@ -0,0 +1,47 @@
+package eu.mhsl.craftattack.spawn.craftattack.appliances.gameplay.frostWalkerBoat;
+
+import eu.mhsl.craftattack.spawn.core.appliance.Appliance;
+import org.bukkit.Material;
+import org.bukkit.NamespacedKey;
+import org.bukkit.block.Block;
+import org.bukkit.block.BlockFace;
+import org.bukkit.block.data.Levelled;
+import org.bukkit.event.Listener;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+
+public class FrostWalkerBoat extends Appliance {
+    public NamespacedKey getNamespacedKey() {
+        return new NamespacedKey(this.getClass().getSimpleName().toLowerCase(), "is_frostwalker_enchanted");
+    }
+
+    public void freezeWater(Block targetBlock) {
+        int radius = 4;
+        double circleRadiusSquared = Math.pow(radius + 0.5, 2);
+
+        for(int xOffset = -radius; xOffset <= radius; xOffset++) {
+            for(int zOffset = -radius; zOffset <= radius; zOffset++) {
+                int distanceSquared =
+                    xOffset * xOffset + zOffset * zOffset;
+
+                if(distanceSquared > circleRadiusSquared) continue;
+
+                Block block = targetBlock.getRelative(xOffset, 0, zOffset);
+
+                if(block.getType() != Material.WATER) continue;
+                if(!(block.getBlockData() instanceof Levelled waterData)) continue;
+                if(waterData.getLevel() != 0) continue;
+                if(!block.getRelative(BlockFace.UP).isEmpty()) continue;
+
+                block.setType(Material.FROSTED_ICE);
+            }
+        }
+    }
+
+    @Override
+    @NotNull
+    protected List<Listener> listeners() {
+        return List.of(new BoatMoveListener());
+    }
+}