Fix entity stacking, looting

src/main/java/com/songoda/ultimatestacker/commands/CommandRemoveAll.java

@@ -3,6 +3,7 @@ package com.songoda.ultimatestacker.commands;
 import com.songoda.core.commands.AbstractCommand;
 import com.songoda.core.utils.TextUtils;
 import com.songoda.ultimatestacker.UltimateStacker;
+import com.songoda.ultimatestacker.stackable.entity.EntityStack;
 import com.songoda.ultimatestacker.stackable.entity.EntityStackManager;
 import com.songoda.ultimatestacker.utils.Methods;
 import org.bukkit.Bukkit;
@@ -48,7 +49,9 @@ public class CommandRemoveAll extends AbstractCommand {
 
                 if (entityO instanceof LivingEntity && (stackManager.isStackedEntity(entityO) || all)
                         && type.equalsIgnoreCase("entities")) {
-                    plugin.getEntityStackManager().getStack((LivingEntity) entityO).destroy();
+                    EntityStack stack = plugin.getEntityStackManager().getStack((LivingEntity) entityO);
+                    if (stack == null) continue;
+                    stack.destroy();
                     amountRemoved++;
                 } else if (entityO.getType() == EntityType.DROPPED_ITEM && type.equalsIgnoreCase("items")) {
                     if (!UltimateStacker.hasCustomAmount((Item)entityO) && !all)

src/main/java/com/songoda/ultimatestacker/listeners/BlockListeners.java

@@ -19,6 +19,7 @@ import org.bukkit.block.CreatureSpawner;
 import org.bukkit.enchantments.Enchantment;
 import org.bukkit.entity.EntityType;
 import org.bukkit.entity.Player;
+import org.bukkit.event.Event;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.EventPriority;
 import org.bukkit.event.Listener;
@@ -40,8 +41,9 @@ public class BlockListeners implements Listener {
         this.plugin = plugin;
     }
 
-    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    @EventHandler(priority = EventPriority.HIGHEST)
     public void onBlockInteract(PlayerInteractEvent event) {
+        if (event.useInteractedBlock() == Event.Result.DENY) return;
         Block block = event.getClickedBlock();
         Player player = event.getPlayer();
         CompatibleHand hand = CompatibleHand.getHand(event);
@@ -166,8 +168,9 @@ public class BlockListeners implements Listener {
         }
     }
 
-    @EventHandler(priority = EventPriority.HIGH, ignoreCancelled = true)
+    @EventHandler(priority = EventPriority.HIGHEST)
     public void onBlockPlace(BlockPlaceEvent event) {
+        if (event.isCancelled()) return;
         Block block = event.getBlock();
         Player player = event.getPlayer();
 
@@ -196,8 +199,9 @@ public class BlockListeners implements Listener {
         plugin.updateHologram(stack);
     }
 
-    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    @EventHandler(priority = EventPriority.HIGHEST)
     public void onBlockBreak(BlockBreakEvent event) {
+        if (event.isCancelled()) return;
         Block block = event.getBlock();
         if (block.getType() != CompatibleMaterial.SPAWNER.getMaterial()) return;
 

src/main/java/com/songoda/ultimatestacker/listeners/DeathListeners.java

@@ -7,6 +7,7 @@ import com.songoda.core.lootables.loot.DropUtils;
 import com.songoda.ultimatestacker.UltimateStacker;
 import com.songoda.ultimatestacker.settings.Settings;
 import com.songoda.ultimatestacker.stackable.entity.EntityStack;
+import org.bukkit.Bukkit;
 import org.bukkit.GameMode;
 import org.bukkit.GameRule;
 import org.bukkit.Material;
@@ -82,6 +83,10 @@ public class DeathListeners implements Listener {
             drops.clear();
 
         if (plugin.getCustomEntityManager().getCustomEntity(entity) == null) {
+            //replace %player% in drop commands with the last player to damage the entity
+            //Run commands here, or it will be buggy
+            runCommands(entity, drops);
+
             if (plugin.getEntityStackManager().isStackedEntity(event.getEntity())) {
                 plugin.getEntityStackManager().getStack(event.getEntity()).onDeath(entity, drops, custom, event.getDroppedExp(), event);
             } else {
@@ -92,6 +97,25 @@ public class DeathListeners implements Listener {
         finalItems.remove(entity.getUniqueId());
     }
 
+    private void runCommands(LivingEntity entity, List<Drop> drops) {
+        String lastDamage = plugin.getEntityStackManager().getLastPlayerDamage(entity);
+        if (lastDamage != null) {
+            List<String> commands = new ArrayList<>();
+            drops.forEach(drop -> {
+                if (drop.getCommand() != null) {
+                    String command = drop.getCommand().replace("%player%", lastDamage);
+                    drop.setCommand(null);
+                    commands.add(command);
+                }
+            });
+            Bukkit.getScheduler().runTask(plugin, () -> {
+                for (String command : commands) {
+                    Bukkit.dispatchCommand(Bukkit.getConsoleSender(), command);
+                }
+            });
+        }
+    }
+
     private boolean shouldDrop(LivingEntity entity, Material material) {
         if (entity.getEquipment() != null && entity.getEquipment().getArmorContents().length != 0) {
             if (Settings.DONT_DROP_ARMOR.getBoolean())

src/main/java/com/songoda/ultimatestacker/listeners/entity/EntityCurrentListener.java

@@ -1,15 +1,16 @@
 package com.songoda.ultimatestacker.listeners.entity;
 
 import com.songoda.ultimatestacker.UltimateStacker;
+import com.songoda.ultimatestacker.settings.Settings;
 import com.songoda.ultimatestacker.stackable.entity.EntityStack;
 import com.songoda.ultimatestacker.stackable.entity.EntityStackManager;
 import org.bukkit.Bukkit;
 import org.bukkit.entity.Entity;
 import org.bukkit.entity.LivingEntity;
-import org.bukkit.entity.Slime;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.EventPriority;
 import org.bukkit.event.Listener;
+import org.bukkit.event.entity.EntityDeathEvent;
 import org.bukkit.event.entity.EntityTransformEvent;
 import org.bukkit.event.world.EntitiesLoadEvent;
 
@@ -31,11 +32,11 @@ public class EntityCurrentListener implements Listener {
                 && event.getEntity() instanceof LivingEntity
                 && event.getTransformedEntity() instanceof LivingEntity) {
             if (event.getTransformReason().equals(EntityTransformEvent.TransformReason.SPLIT)) {
-                stackManager.getStack((LivingEntity) event.getEntity()).removeEntityFromStack(1);
                 event.setCancelled(true);
                 return;
             }
             EntityStack stack = stackManager.updateStack((LivingEntity) event.getEntity(), (LivingEntity) event.getTransformedEntity());
+            if (stack == null) return;
             stack.releaseHost();
         }
     }

src/main/java/com/songoda/ultimatestacker/lootables/LootablesManager.java

@@ -101,6 +101,10 @@ public class LootablesManager {
                 looting);
     }
 
+    public List<ItemStack> getItemStackDrops(LivingEntity entity, int times) {
+        return getDrops(entity, times).stream().map(Drop::getItemStack).collect(Collectors.toList());
+    }
+
     public List<Drop> getDrops(LivingEntity entity, int times) {
         return getDrops(entity, times, 3);
     }

src/main/java/com/songoda/ultimatestacker/stackable/entity/EntityStack.java

@@ -23,6 +23,7 @@ import org.bukkit.inventory.ItemStack;
 import org.bukkit.util.Vector;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 import java.util.Objects;
 import java.util.concurrent.ThreadLocalRandom;
@@ -116,22 +117,11 @@ public class EntityStack extends StackedEntity {
         killed.setCustomName(null);
         killed.setCustomNameVisible(false);
 
-        //replace %player% in drop commands with the last player to damage the entity
-        String lastDamage = plugin.getEntityStackManager().getLastPlayerDamage(killed);
-        if (lastDamage != null) {
-            drops.forEach(drop -> {
-                if (drop.getCommand() != null) {
-                    drop.setCommand(drop.getCommand().replace("%player%", lastDamage));
-                }
-            });
-        }
-
         boolean killWholeStack = Settings.KILL_WHOLE_STACK_ON_DEATH.getBoolean()
                 || plugin.getMobFile().getBoolean("Mobs." + killed.getType().name() + ".Kill Whole Stack");
 
         if (killWholeStack && getAmount() > 1) {
             handleWholeStackDeath(killed, drops, custom, droppedExp, event);
-            return;
         } else if (getAmount() > 1) {
             List<String> reasons = Settings.INSTANT_KILL.getStringList();
             EntityDamageEvent lastDamageCause = killed.getLastDamageCause();
@@ -144,9 +134,9 @@ public class EntityStack extends StackedEntity {
                     return;
                 }
             }
-        }
             handleSingleStackDeath(killed, drops, droppedExp, event);
         }
+    }
 
     public synchronized LivingEntity takeOneAndSpawnEntity(Location location) {
         if (amount <= 0) return null;

src/main/java/com/songoda/ultimatestacker/stackable/entity/EntityStackManager.java

@@ -111,10 +111,10 @@ public class EntityStackManager {
      * @param newEntity The new entity to transfer the stack to.
      * @return The new stack.
      */
-    public EntityStack transferStack(LivingEntity oldEntity, LivingEntity newEntity) {
+    public EntityStack transferStack(LivingEntity oldEntity, LivingEntity newEntity, boolean takeOne) {
         EntityStack stack = getStack(oldEntity);
         if (stack == null) return null;
-        EntityStack newStack = new EntityStack(newEntity, stack.getAmount());
+        EntityStack newStack = new EntityStack(newEntity, takeOne ? stack.getAmount()-1 : stack.getAmount());
         stack.destroy();
         return newStack;
     }

src/main/java/com/songoda/ultimatestacker/stackable/entity/custom/CustomEntityManager.java

@@ -54,4 +54,11 @@ public class CustomEntityManager {
     public boolean isCustomEntity(Entity entity) {
         return getCustomEntity(entity) != null && getCustomEntity(entity).isCustomEntity(entity);
     }
+
+    public boolean isStackable(Entity entity) {
+        CustomEntity customEntity = getCustomEntity(entity);
+        if (customEntity == null) return true;
+        String key = customEntity.getPluginName().toLowerCase() + "_" + customEntity.getNBTIdentifier(entity).toLowerCase();
+        return !Settings.BLACKLISTED_CUSTOM_ENTITIES.getStringList().contains(key);
+    }
 }

src/main/java/com/songoda/ultimatestacker/tasks/StackingTask.java

@@ -355,16 +355,20 @@ public class StackingTask extends TimerTask {
      */
     private List<LivingEntity> getFriendlyStacksNearby(LivingEntity entity, double radius, boolean singleChunk) {
         List<LivingEntity> entities = new ArrayList<>();
+        try {
             Set<CachedChunk> chunks = getNearbyChunks(new SWorld(entity.getWorld()), entity.getLocation(), radius, singleChunk);
             for (CachedChunk chunk : chunks) {
-            Entity[] entityList = chunk.getEntities();
+                Entity[] entityList = getEntitiesInChunkSync(chunk).get();
                 for (Entity e : entityList) {
                     if (!processed.contains(e.getUniqueId()) && e.getType() == entity.getType() && e instanceof LivingEntity && e.isValid() && e.getLocation().distance(entity.getLocation()) <= radius) {
                         entities.add((LivingEntity) e);
                     }
                 }
             }
-        entities.removeIf(entity1 -> entity1.equals(entity));
+            entities.removeIf(entity1 -> entity1.equals(entity) || !UltimateStacker.getInstance().getCustomEntityManager().isStackable(entity1));
+        } catch (Exception ex) {
+            ex.printStackTrace();
+        }
         return entities;
     }