Add support for enemies' loot

src/main/java/com/bartlomiejpluta/demo/entity/Enemy.java

@@ -1,5 +1,7 @@
 package com.bartlomiejpluta.demo.entity;
 
+import DB.EnemyDropDAO;
+import DB.dao;
 import com.bartlomiejpluta.base.api.ai.AI;
 import com.bartlomiejpluta.base.api.ai.NPC;
 import com.bartlomiejpluta.base.api.context.ContextHolder;
@@ -7,20 +9,31 @@ import com.bartlomiejpluta.base.api.move.MoveEvent;
 import com.bartlomiejpluta.base.lib.ai.NoopAI;
 import com.bartlomiejpluta.base.lib.animation.AnimationRunner;
 import com.bartlomiejpluta.base.lib.animation.SimpleAnimationRunner;
+import com.bartlomiejpluta.base.lib.db.Relop;
 import com.bartlomiejpluta.base.util.random.DiceRoller;
 import com.bartlomiejpluta.demo.ai.*;
 import com.bartlomiejpluta.demo.event.EnemyDiedEvent;
-import com.bartlomiejpluta.demo.runner.DemoRunner;
+import com.bartlomiejpluta.demo.world.item.Item;
 import com.bartlomiejpluta.demo.world.weapon.Ammunition;
 import com.bartlomiejpluta.demo.world.weapon.MeleeWeapon;
 import com.bartlomiejpluta.demo.world.weapon.RangedWeapon;
 import lombok.Getter;
 import lombok.NonNull;
 
+import java.util.Random;
+
+import static com.bartlomiejpluta.demo.util.ListUtil.randomIntSequence;
+
 
 public class Enemy extends Creature implements NPC {
+   public static final int MAX_LOOT = 4 * 4;
+
+   private final Random random = new Random();
    private final DB.model.EnemyModel template;
    private final AnimationRunner dieAnimation;
+
+   @Getter
+   private final Item[] loot = new Item[MAX_LOOT];
    @Getter
    private final String name;
    private AI ai = NoopAI.INSTANCE;
@@ -78,8 +91,35 @@ public class Enemy extends Creature implements NPC {
       dieAnimation.run(context, getLayer(), this);
       context.playSound(A.sounds.get(template.getDieSound()).uid);
       context.fireEvent(new EnemyDiedEvent(this));
+
+      drawLoot();
    }
 
+   private void drawLoot() {
+      var def = dao.enemy_drop.query()
+              .where(EnemyDropDAO.Column.ENEMY, Relop.EQ, template.getId())
+              .orderBy("rand()")
+              .find();
+
+      var indexesIterator = randomIntSequence(0, loot.length).iterator();
+      for (var d : def) {
+         if (!indexesIterator.hasNext()) {
+            break;
+         }
+
+         var index = indexesIterator.next();
+
+         var split = d.getItem().split(":");
+         loot[index] = switch (split[0]) {
+            case "melee_weapon" -> new MeleeWeapon(split[1]);
+            case "ranged_weapon" -> new RangedWeapon(split[1]);
+            case "ammo" -> new Ammunition(split[1], DiceRoller.of(d.getAmount()).roll());
+            default -> throw new IllegalArgumentException("Unsupported item type");
+         };
+      }
+   }
+
+
    public Enemy followAndAttack(Creature target, int range) {
       var ai = new SimpleEnemyAI(this, target, range);