Remove end exit island deletion

Reverts that part because it causes an endless loop of chunk reloading
and block placement.

src/main/java/world/bentobox/bentobox/listeners/BlockEndDragon.java

@@ -3,13 +3,13 @@ package world.bentobox.bentobox.listeners;
 import java.util.Arrays;
 import java.util.List;
 
-import org.bukkit.Bukkit;
 import org.bukkit.Material;
 import org.bukkit.World.Environment;
 import org.bukkit.entity.EntityType;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.EventPriority;
 import org.bukkit.event.Listener;
+import org.bukkit.event.block.BlockBreakEvent;
 import org.bukkit.event.block.BlockPlaceEvent;
 import org.bukkit.event.entity.CreatureSpawnEvent;
 import org.bukkit.event.world.ChunkLoadEvent;
@@ -35,7 +35,7 @@ public class BlockEndDragon implements Listener {
     }
 
     /**
-     * This handles end dragon spawning prevention
+     * This handles end dragon spawning prevention. Does not kill dragon because that generates random portal placement
      *
      * @param e - event
      * @return true if dragon can spawn, false if not
@@ -53,11 +53,7 @@ public class BlockEndDragon implements Listener {
 
 
     /**
-     * This listener aims to delete the end trophy from the end when it is generated
+     * This listener moves the end exit island high up in the sky
-     * It is added by special code in the server that can't be overidden so the only
-     * option is to delete it manually. This means that any island at 0,0 will have
-     * a dead zone of a few blocks directly above it. Hopefully this will not be a
-     * major issue.
      * @param e - event
      */
     @EventHandler(priority = EventPriority.LOWEST, ignoreCancelled = true)
@@ -67,29 +63,16 @@ public class BlockEndDragon implements Listener {
                 || !plugin.getIWM().inWorld(e.getWorld())
                 || !plugin.getIWM().isEndGenerate(e.getWorld())
                 || !plugin.getIWM().isEndIslands(e.getWorld())
-                || !CHUNKS.contains(new Pair<Integer, Integer>(e.getChunk().getX(), e.getChunk().getZ()))) {
+                || !(e.getChunk().getX() == 0 && e.getChunk().getZ() == 0)) {
             return;
         }
         // Setting a bedrock block here forces the spike to be placed as high as possible
-        if (e.getChunk().getX() == 0 && e.getChunk().getZ() == 0) {
+        e.getChunk().getBlock(0, 255, 0).setType(Material.BEDROCK);
-            e.getChunk().getBlock(0, 255, 0).setType(Material.BEDROCK);
-        }
-        // Remove trophy spike / exit portal after a while
-        Bukkit.getScheduler().runTaskLater(plugin, () -> {
-            for (int x = 0; x < 16; x++) {
-                for (int z = 0; z < 16; z++) {
-                    for (int y = DEAD_ZONE_Y; y < e.getWorld().getMaxHeight(); y++) {
-                        e.getChunk().getBlock(x, y, z).setType(Material.AIR);
-                    }
-                }
-            }
-        }, 20L);
     }
 
     /**
      * Silently prevents block placing in the dead zone.
-     * This is just a simple protection. If the player uses fancy ways to get blocks
+     * This is just a simple protection.
-     * into the dead zone it'll just mean they get deleted next time the chunks are loaded.
      * @param e - event
      */
     @EventHandler(priority = EventPriority.LOWEST, ignoreCancelled = true)
@@ -106,4 +89,24 @@ public class BlockEndDragon implements Listener {
         }
         e.setCancelled(true);
     }
+
+    /**
+     * Silently prevents block breaking in the dead zone.
+     * This is just a simple protection.
+     * @param e - event
+     */
+    @EventHandler(priority = EventPriority.LOWEST, ignoreCancelled = true)
+    public void onEndBlockBreak(BlockBreakEvent e) {
+        if (!Flags.REMOVE_END_EXIT_ISLAND.isSetForWorld(e.getBlock().getWorld())
+                || e.getBlock().getY() < DEAD_ZONE_Y
+                || !e.getBlock().getWorld().getEnvironment().equals(Environment.THE_END)
+                || !plugin.getIWM().inWorld(e.getBlock().getWorld())
+                || !plugin.getIWM().isEndGenerate(e.getBlock().getWorld())
+                || !plugin.getIWM().isEndIslands(e.getBlock().getWorld())
+                || !CHUNKS.contains(new Pair<Integer, Integer>(e.getBlock().getChunk().getX(), e.getBlock().getChunk().getZ()))
+                ) {
+            return;
+        }
+        e.setCancelled(true);
+    }
 }