Merge pull request #66 from jtara1/master

HarvesterNPC should spawn a biomass in-place after they die. Fixes #33

Plugin NPC/src/main/java/net/simon987/npcplugin/HarvesterNPC.java

@@ -3,9 +3,13 @@ package net.simon987.npcplugin;
 import com.mongodb.BasicDBObject;
 import com.mongodb.DBObject;
 import net.simon987.server.GameServer;
+import net.simon987.server.event.ObjectDeathEvent;
 import net.simon987.server.game.Direction;
+import net.simon987.server.logging.LogManager;
 import org.json.simple.JSONObject;
 
+import java.lang.util.Random;
+
 public class HarvesterNPC extends NonPlayerCharacter {
 
     public static final int ID = 10;
@@ -44,6 +48,12 @@ public class HarvesterNPC extends NonPlayerCharacter {
         }
     }
 
+    @Override
+    public void onDeadCallback() {
+        GameServer.INSTANCE.getEventDispatcher().dispatch(
+            new ObjectDeathEvent((Object)this, ID));
+    }
+
     @Override
     public JSONObject serialise() {
         JSONObject json = super.serialise();

Plugin Plant/src/main/java/net/simon987/biomassplugin/event/ObjectDeathListener.java

@@ -0,0 +1,62 @@
+package net.simon987.biomassplugin.event;
+
+import net.simon987.server.GameServer;
+import net.simon987.server.event.GameEvent;
+import net.simon987.server.event.GameEventListener;
+import net.simon987.server.event.ObjectDeathEvent;
+import net.simon987.biomassplugin.BiomassBlob;
+import net.simon987.server.game.GameObject;
+import net.simon987.server.game.World;
+import net.simon987.server.logging.LogManager;
+
+import java.lang.Random;
+
+/**
+ * Handles ObjectDeathEvent events
+ */
+public class ObjectDeathListener implements GameEventListener {
+    @Override
+    public Class getListenedEventType() {
+        return ObjectDeathEvent.getClass();
+    }
+
+    @Override
+    public void handle(GameEvent event) {
+        // a HarvesterNPC ObjectDeathEvent is received
+        // TODO: setup enum with all GameObject type IDs
+        if (((ObjectDeathEvent)event).getSourceObjectId().equals(10)) {
+            GameObject dyingHarvesterNPC = (GameObject)event.getSource();
+
+            // create a new biomass
+            BiomassBlob newBiomassBlob = createBiomassBlobAt(
+                    dyingHarvesterNPC.getX(), dyingHarvesterNPC.getY(), dyingHarvesterNPC.getWorld());
+            // add it to the world game objects
+            dyingHarvesterNPC.getWorld().getGameObjects.add(newBiomassBlob);
+            LogManager.LOGGER.fine("Spawned biomass at (%d, %d)".format(
+                    newBiomassBlob.getX(),newBiomassBlob.getY()));
+        }
+    }
+
+    /**
+     * Create and return a biomass at the given x, y coordinates and in the world
+     * @param x x coord of biomass location
+     * @param y y coord of biomass location
+     * @param world world in which the biomass will be created in
+     * @return the new BiomassBlob created
+     */
+    private BiomassBlob createBiomassBlobAt(int x, int y, World world) {
+        Random random = new Random();
+        // random integer in range [2, 4]
+        int yield = random.nextInt(2) + 2;
+
+        BiomassBlob biomassBlob = new BiomassBlob();
+        biomassBlob.setObjectId(GameServer.INSTANCE.getGameUniverse().getNextObjectId());
+        // biomassBlob.setStyle(0); //TODO: set style depending on difficulty level? or random? from config?
+        biomassBlob.setBiomassCount(yield);
+        biomassBlob.setX(x);
+        biomassBlob.setY(y);
+        biomassBlob.setWorld(world);
+
+        return biomassBlob;
+    }
+}

Server/src/main/java/net/simon987/server/event/ObjectDeathEvent.java

@@ -0,0 +1,18 @@
+package net.simon987.server.event;
+
+/**
+ * Event dispatched by a GameObject who has needed callbacks on death
+ */
+public class ObjectDeathEvent extends GameEvent {
+    /**
+     * The GameObject type ID of object that init this event
+     */
+    private int sourceObjectId;
+
+    public ObjectDeathEvent(Object source, int sourceObjectId) {
+        setSource(source);
+        this.sourceObjectId = sourceObjectId;
+    }
+
+    public int getSourceObjectId() { return sourceObjectId; }
+}

Server/src/main/java/net/simon987/server/game/GameObject.java

@@ -254,4 +254,9 @@ public abstract class GameObject implements JSONSerialisable, MongoSerialisable
     public void setDead(boolean dead) {
         this.dead = dead;
     }
+
+    /**
+     * Called before this GameObject is removed from the world - defaults to doing nothing
+     */
+    public void onDeadCallback() { }
 }

Server/src/main/java/net/simon987/server/game/World.java

@@ -104,6 +104,7 @@ public class World implements MongoSerialisable {
         for (GameObject object : gameObjects_) {
             //Clean up dead objects
             if (object.isDead()) {
+                object.onDeadCallback();
                 gameObjects.remove(object);
                 //LogManager.LOGGER.fine("Removed object " + object + " id: " + object.getObjectId());
             } else if (object instanceof Updatable) {