Add TNT only making Damage in spawning Region

BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/region/TNTListener.java

@@ -21,13 +21,16 @@ package de.steamwar.bausystem.features.region;
 
 import de.steamwar.bausystem.BauSystem;
 import de.steamwar.bausystem.region.Region;
+import de.steamwar.bausystem.region.RegionSystem;
 import de.steamwar.bausystem.region.RegionUtils;
 import de.steamwar.bausystem.region.flags.Flag;
 import de.steamwar.bausystem.region.flags.TNTMode;
 import de.steamwar.bausystem.utils.ScoreboardElement;
 import de.steamwar.linkage.Linked;
 import org.bukkit.Material;
+import org.bukkit.NamespacedKey;
 import org.bukkit.block.Block;
+import org.bukkit.entity.Entity;
 import org.bukkit.entity.Player;
 import org.bukkit.entity.TNTPrimed;
 import org.bukkit.event.EventHandler;
@@ -35,12 +38,26 @@ import org.bukkit.event.EventPriority;
 import org.bukkit.event.Listener;
 import org.bukkit.event.block.BlockExplodeEvent;
 import org.bukkit.event.entity.EntityExplodeEvent;
+import org.bukkit.event.entity.EntitySpawnEvent;
+import org.bukkit.persistence.PersistentDataType;
 
 import java.util.List;
+import java.util.Objects;
+import java.util.UUID;
 
 @Linked
 public class TNTListener implements Listener, ScoreboardElement {
 
+    private static final NamespacedKey SPAWN_REGION_ID = Objects.requireNonNull(NamespacedKey.fromString("spawn_region_id", BauSystem.getInstance()));
+
+    @EventHandler
+    public void onEntitySpawn(EntitySpawnEvent event) {
+        Entity entity = event.getEntity();
+        if (!(entity instanceof TNTPrimed)) return;
+        Region region = Region.getRegion(entity.getLocation());
+        entity.getPersistentDataContainer().set(SPAWN_REGION_ID, PersistentDataType.STRING, region.getID().toString());
+    }
+
     private void explode(List<Block> blockList, boolean destroy) {
         blockList.removeIf(block -> {
             Region region = Region.getRegion(block.getLocation());
@@ -71,6 +88,25 @@ public class TNTListener implements Listener, ScoreboardElement {
             event.blockList().clear();
             return;
         }
+
+        Entity entity = event.getEntity();
+        Region currentRegion = Region.getRegion(entity.getLocation());
+        String spawningRegionIdString = entity.getPersistentDataContainer().get(SPAWN_REGION_ID, PersistentDataType.STRING);
+        UUID spawningRegionId = spawningRegionIdString == null ? null : UUID.fromString(spawningRegionIdString);
+
+        // TNT Only created block damage in the Region it spawned in or in a connected special region!
+        if (!currentRegion.getID().equals(spawningRegionId)) {
+            if (!currentRegion.getType().isSpecial()) {
+                event.blockList().clear();
+                return;
+            }
+            if (RegionSystem.INSTANCE.getConnectedRegions(currentRegion)
+                    .noneMatch(region -> region.getID().equals(spawningRegionId))) {
+                event.blockList().clear();
+                return;
+            }
+        }
+
         explode(event.blockList(), true);
     }
 

BauSystem/BauSystem_Main/src/de/steamwar/bausystem/region/RegionSystem.java

@@ -76,6 +76,12 @@ public interface RegionSystem {
     @NonNull
     Stream<Region> getRegions();
 
+    /**
+     * Only contains Regions of the same Type as the one you inputted.
+     */
+    @NonNull
+    Stream<Region> getConnectedRegions(Region region);
+
     private static RegionSystem init() {
         if (Core.getVersion() >= 21) {
             // TODO: Add some kind of detection if the DynamicRegionSystem should be used!
@@ -122,6 +128,11 @@ public interface RegionSystem {
             public Stream<Region> getRegions() {
                 throw new UnsupportedOperationException();
             }
+
+            @Override
+            public @NonNull Stream<Region> getConnectedRegions(Region region) {
+                throw new UnsupportedOperationException();
+            }
         };
     }
 }

BauSystem/BauSystem_RegionDynamic/src/de/steamwar/bausystem/region/DynamicRegionSystem.java

@@ -164,6 +164,7 @@ public class DynamicRegionSystem implements RegionSystem {
                 .map(DynamicRegion.class::cast);
     }
 
+    @Override
     public Stream<Region> getConnectedRegions(Region region) {
         Set<Region> regions = regionTypeMap.get(region.getType());
 

BauSystem/BauSystem_RegionFixed/src/de/steamwar/bausystem/region/FixedRegionSystem.java

@@ -75,4 +75,9 @@ public class FixedRegionSystem implements RegionSystem {
     public Stream<Region> getRegions() {
         return REGION_MAP.values().stream();
     }
+
+    @Override
+    public @NonNull Stream<Region> getConnectedRegions(Region region) {
+        return Stream.empty();
+    }
 }