add EntitySpawnEvent

common/src/main/java/com/dfsek/terra/api/event/events/AbstractCancellable.java

@@ -0,0 +1,20 @@
+package com.dfsek.terra.api.event.events;
+
+import com.dfsek.terra.api.util.mutable.MutableBoolean;
+
+/**
+ * Abstract class containing basic {@link Cancellable} implementation.
+ */
+public abstract class AbstractCancellable implements Cancellable {
+    private final MutableBoolean cancelled = new MutableBoolean(false);
+
+    @Override
+    public boolean isCancelled() {
+        return cancelled.get();
+    }
+
+    @Override
+    public void setCancelled(boolean cancelled) {
+        this.cancelled.set(cancelled);
+    }
+}

common/src/main/java/com/dfsek/terra/api/event/events/world/generation/EntitySpawnEvent.java

@@ -0,0 +1,45 @@
+package com.dfsek.terra.api.event.events.world.generation;
+
+import com.dfsek.terra.api.event.events.PackEvent;
+import com.dfsek.terra.api.math.vector.Location;
+import com.dfsek.terra.api.platform.entity.Entity;
+import com.dfsek.terra.api.structures.structure.buffer.items.BufferedEntity;
+import com.dfsek.terra.config.pack.ConfigPack;
+
+/**
+ * Called when an entity is spawned via {@link BufferedEntity}.
+ */
+public class EntitySpawnEvent implements PackEvent {
+    private final ConfigPack pack;
+    private final Entity entity;
+    private final Location location;
+
+    public EntitySpawnEvent(ConfigPack pack, Entity entity, Location location) {
+        this.pack = pack;
+        this.entity = entity;
+        this.location = location;
+    }
+
+    @Override
+    public ConfigPack getPack() {
+        return pack;
+    }
+
+    /**
+     * Get the entity that triggered the event.
+     *
+     * @return The entity.
+     */
+    public Entity getEntity() {
+        return entity;
+    }
+
+    /**
+     * Get the location of the entity.
+     *
+     * @return Location of the entity.
+     */
+    public Location getLocation() {
+        return location;
+    }
+}

common/src/main/java/com/dfsek/terra/api/event/events/world/generation/LootPopulateEvent.java

@@ -1,21 +1,20 @@
 package com.dfsek.terra.api.event.events.world.generation;
 
+import com.dfsek.terra.api.event.events.AbstractCancellable;
 import com.dfsek.terra.api.event.events.Cancellable;
 import com.dfsek.terra.api.event.events.PackEvent;
 import com.dfsek.terra.api.platform.block.Block;
 import com.dfsek.terra.api.platform.block.state.Container;
 import com.dfsek.terra.api.structures.structure.buffer.items.BufferedLootApplication;
-import com.dfsek.terra.api.util.mutable.MutableBoolean;
 import com.dfsek.terra.config.pack.ConfigPack;
 
 /**
  * Called when loot is populated via {@link BufferedLootApplication}.
  */
-public class LootPopulateEvent implements PackEvent, Cancellable {
+public class LootPopulateEvent extends AbstractCancellable implements PackEvent, Cancellable {
     private final Block block;
     private final Container container;
     private final ConfigPack pack;
-    private final MutableBoolean cancelled = new MutableBoolean();
 
     public LootPopulateEvent(Block block, Container container, ConfigPack pack) {
         this.block = block;
@@ -30,6 +29,7 @@ public class LootPopulateEvent implements PackEvent, Cancellable {
 
     /**
      * Get the block containing the tile entity loot is applied to.
+     *
      * @return Block at which loot is applied.
      */
     public Block getBlock() {
@@ -38,19 +38,10 @@ public class LootPopulateEvent implements PackEvent, Cancellable {
 
     /**
      * Get the {@link Container} representing the inventory.
+     *
      * @return Inventory recieving loot.
      */
     public Container getContainer() {
         return container;
     }
-
-    @Override
-    public boolean isCancelled() {
-        return cancelled.get();
-    }
-
-    @Override
-    public void setCancelled(boolean cancelled) {
-        this.cancelled.set(cancelled);
-    }
 }

common/src/main/java/com/dfsek/terra/api/structures/script/functions/EntityFunction.java

@@ -21,9 +21,11 @@ public class EntityFunction implements Function<Void> {
     private final EntityType data;
     private final Returnable<Number> x, y, z;
     private final Position position;
+    private final TerraPlugin main;
 
     public EntityFunction(Returnable<Number> x, Returnable<Number> y, Returnable<Number> z, Returnable<String> data, TerraPlugin main, Position position) throws ParseException {
         this.position = position;
+        this.main = main;
         if(!(data instanceof ConstantExpression)) throw new ParseException("Entity data must be constant", data.getPosition());
 
         this.data = main.getWorldHandle().getEntity(((ConstantExpression<String>) data).getConstant());
@@ -39,7 +41,7 @@ public class EntityFunction implements Function<Void> {
 
         RotationUtil.rotateVector(xz, arguments.getRotation());
 
-        arguments.getBuffer().addItem(new BufferedEntity(data), new Vector3(xz.getX(), y.apply(implementationArguments, variableMap).doubleValue(), xz.getZ()).toLocation(arguments.getBuffer().getOrigin().getWorld()));
+        arguments.getBuffer().addItem(new BufferedEntity(data, main), new Vector3(xz.getX(), y.apply(implementationArguments, variableMap).doubleValue(), xz.getZ()).toLocation(arguments.getBuffer().getOrigin().getWorld()));
         return null;
     }
 

common/src/main/java/com/dfsek/terra/api/structures/structure/buffer/items/BufferedEntity.java

@@ -1,18 +1,24 @@
 package com.dfsek.terra.api.structures.structure.buffer.items;
 
+import com.dfsek.terra.api.TerraPlugin;
+import com.dfsek.terra.api.event.events.world.generation.EntitySpawnEvent;
 import com.dfsek.terra.api.math.vector.Location;
+import com.dfsek.terra.api.platform.entity.Entity;
 import com.dfsek.terra.api.platform.entity.EntityType;
 
 public class BufferedEntity implements BufferedItem {
 
     private final EntityType type;
+    private final TerraPlugin main;
 
-    public BufferedEntity(EntityType type) {
+    public BufferedEntity(EntityType type, TerraPlugin main) {
         this.type = type;
+        this.main = main;
     }
 
     @Override
     public void paste(Location origin) {
-        origin.clone().add(0.5, 0, 0.5).getWorld().spawnEntity(origin, type);
+        Entity entity = origin.clone().add(0.5, 0, 0.5).getWorld().spawnEntity(origin, type);
+        main.getEventManager().callEvent(new EntitySpawnEvent(main.getWorld(entity.getWorld()).getGenerator().getConfigPack(), entity, entity.getLocation()));
     }
 }

common/src/main/java/com/dfsek/terra/api/util/mutable/MutableBoolean.java

@@ -5,6 +5,14 @@ import org.jetbrains.annotations.NotNull;
 public class MutableBoolean implements MutablePrimitive<Boolean> {
     private boolean value;
 
+    public MutableBoolean() {
+        this.value = false;
+    }
+
+    public MutableBoolean(boolean value) {
+        this.value = value;
+    }
+
     @Override
     public Boolean get() {
         return value;