Create melee weapons system

.gitignore

@@ -1 +1,2 @@
 build/
+data.trace.db

src/main/java/com/bartlomiejpluta/demo/database/dao/MeleeWeaponDAO.java

@@ -0,0 +1,32 @@
+package com.bartlomiejpluta.demo.database.dao;
+
+import java.sql.*;
+import java.util.*;
+
+import com.bartlomiejpluta.base.api.context.Context;
+
+import com.bartlomiejpluta.demo.database.model.MeleeWeaponModel;
+
+public class MeleeWeaponDAO {
+	private final Map<String, MeleeWeaponModel> items = new HashMap<>();
+
+	public void init(Context context) {
+		context.withDatabase(db -> {
+			var result = db.prepareStatement("SELECT * FROM `melee_weapon`").executeQuery();
+
+			while(result.next()) {
+				var weapon = MeleeWeaponModel.builder()
+					.id(result.getString("id"))
+					.name(result.getString("name"))
+					.damage(result.getString("damage"))
+					.cooldown(result.getInt("cooldown"))
+					.build();
+				items.put(result.getString("id"), weapon);
+			}
+		});
+	}
+
+	public MeleeWeaponModel get(String id) {
+		return items.get(id);
+	}
+}

src/main/java/com/bartlomiejpluta/demo/database/model/MeleeWeaponModel.java

@@ -0,0 +1,12 @@
+package com.bartlomiejpluta.demo.database.model;
+
+import lombok.*;
+
+@Data
+@Builder
+public class MeleeWeaponModel {
+	private final String id;
+	private final String name;
+	private final String damage;
+	private final int cooldown;
+}

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

@@ -1,15 +1,53 @@
 package com.bartlomiejpluta.demo.entity;
 
 import lombok.*;
+import org.slf4j.*;
+import org.joml.Vector2i;
 import com.bartlomiejpluta.base.api.context.Context;
 import com.bartlomiejpluta.base.api.entity.Entity;
 import com.bartlomiejpluta.base.lib.entity.EntityDelegate;
 
+import com.bartlomiejpluta.demo.world.weapon.MeleeWeapon;
+
 public class Character extends EntityDelegate {
+	private static final Logger log = LoggerFactory.getLogger(Character.class);
 	protected final Context context;
+	protected int attackCooldown = 0;
+
+	@Setter
+	private MeleeWeapon weapon;
 	
 	public Character(@NonNull Context context, @NonNull Entity entity) {
 		super(entity);
 		this.context = context;
 	}
+
+	public void attack() {
+		if(weapon == null) {
+			return;
+		}
+
+		if(attackCooldown >= weapon.getCooldown()) {
+			var facingNeighbour = getCoordinates().add(getFaceDirection().vector, new Vector2i());
+			for(var entity : getLayer().getEntities()) {
+				if(entity.getCoordinates().equals(facingNeighbour) && entity.isBlocking() && entity instanceof Character) {
+					weapon.attack((Character) entity);
+					attackCooldown = 0;
+				}
+			}
+		}
+	}
+
+	public void hit(int dmg) {
+		log.info(toString() + " received " + dmg + " damage");
+	}
+
+	@Override
+	public void update(float dt) {
+		super.update(dt);
+
+		if(weapon != null && attackCooldown < weapon.getCooldown()) {
+			attackCooldown += (int) (dt * 1000f);
+		}
+	}
 }

src/main/java/com/bartlomiejpluta/demo/map/BaseMapHandler.java

@@ -13,6 +13,7 @@ import com.bartlomiejpluta.base.lib.camera.*;
 
 import com.bartlomiejpluta.demo.runner.DemoRunner;
 import com.bartlomiejpluta.demo.entity.Player;
+import com.bartlomiejpluta.demo.entity.Character;
 
 public abstract class BaseMapHandler implements MapHandler {
 	protected Screen screen;
@@ -41,6 +42,10 @@ public abstract class BaseMapHandler implements MapHandler {
 			return;
 		}
 
+		if(input.isKeyPressed(Key.KEY_SPACE)) {
+			player.attack();
+		}
+
 		if(input.isKeyPressed(Key.KEY_LEFT_CONTROL)) {
 			if(input.isKeyPressed(Key.KEY_DOWN)) {
 				player.setFaceDirection(Direction.DOWN);

src/main/java/com/bartlomiejpluta/demo/runner/DemoRunner.java

@@ -13,6 +13,9 @@ import com.bartlomiejpluta.base.api.runner.GameRunner;
 import com.bartlomiejpluta.demo.map.ForrestTempleHandler;
 import com.bartlomiejpluta.demo.entity.Player;
 import com.bartlomiejpluta.demo.menu.MenuManager;
+import com.bartlomiejpluta.demo.database.dao.MeleeWeaponDAO;
+
+import com.bartlomiejpluta.demo.world.weapon.MeleeWeapon;
 
 public class DemoRunner implements GameRunner {
    private static final Logger log = LoggerFactory.getLogger(DemoRunner.class);
@@ -20,6 +23,9 @@ public class DemoRunner implements GameRunner {
    private Context context;
    private MenuManager menu;
 
+   @Getter
+   private MeleeWeaponDAO meleeWeaponDAO = new MeleeWeaponDAO();
+
    @Getter
    private Player player;
 
@@ -27,9 +33,10 @@ public class DemoRunner implements GameRunner {
    public void init(Context context) {
    	this.context = context;
    	this.screen = context.getScreen();
-		
+
 		configureScreen();
 		configureCamera();
+		initDAOs();
 		initMenu();
 		initPlayer();
 
@@ -37,17 +44,21 @@ public class DemoRunner implements GameRunner {
 
 		screen.show();
    }
-   
+
    private void configureScreen() {
 		var resolution = screen.getCurrentResolution();		
 		screen.setSize(800, 600);
 		screen.setPosition((resolution.x() - 800)/2, (resolution.y() - 600)/2);   
    }
-   
+
    private void configureCamera() {
    	context.getCamera().setScale(2f);
    }
-   
+
+   private void initDAOs() {
+		meleeWeaponDAO.init(context);
+   }
+
    private void initMenu() {
 		this.menu = new MenuManager(this, context);
    }
@@ -55,7 +66,7 @@ public class DemoRunner implements GameRunner {
    private void initPlayer() {
 		this.player = new Player(context, context.createEntity("815a5c5c-4979-42f5-a42a-ccbbff9a97e5"));
    }
-   
+
    private void resetPlayer() {
    	this.player.changeEntitySet("815a5c5c-4979-42f5-a42a-ccbbff9a97e5");
 		this.player.setScale(1.0f);
@@ -63,8 +74,9 @@ public class DemoRunner implements GameRunner {
 		this.player.setAnimationSpeed(0.005f);	
 		this.player.setBlocking(true);	
 		this.player.setCoordinates(0, 11);
+		this.player.setWeapon(new MeleeWeapon(meleeWeaponDAO.get("wooden_sword")));
    }
-   
+
    public void newGame() {
 		menu.closeAll();
 		menu.enableGameMenu();
@@ -95,6 +107,4 @@ public class DemoRunner implements GameRunner {
    public void dispose() {
       // Do something after game loop is end
    }
-   
-   
 }

src/main/java/com/bartlomiejpluta/demo/util/DiceRoller.java

@@ -0,0 +1,31 @@
+package com.bartlomiejpluta.demo.util;
+
+import lombok.*;
+import java.util.*;
+import java.util.regex.*;
+
+@Data
+@AllArgsConstructor
+public class DiceRoller {
+	private static final Pattern CODE_PATTERN = Pattern.compile("(\\d+)d(\\d+)([+-]\\d+)?");
+	private final Random random = new Random();
+	private int rolls;
+	private int dice;
+	private int modifier;
+
+	public int roll() {
+		var sum = modifier;
+
+		for(int i=0; i<rolls; ++i) {
+			sum += random.nextInt(dice) + 1;
+		}
+
+		return Math.max(0, sum);
+	}
+
+	public static DiceRoller of(String code) {
+		var matcher = CODE_PATTERN.matcher(code);
+		matcher.matches();
+		return new DiceRoller(Integer.valueOf(matcher.group(1)), Integer.valueOf(matcher.group(2)), Integer.valueOf(matcher.group(3)));
+	}
+}

src/main/java/com/bartlomiejpluta/demo/world/weapon/MeleeWeapon.java

@@ -0,0 +1,29 @@
+package com.bartlomiejpluta.demo.world.weapon;
+
+import java.util.Random;
+
+import lombok.*;
+import com.bartlomiejpluta.demo.database.model.MeleeWeaponModel;
+import com.bartlomiejpluta.demo.entity.Character;
+import com.bartlomiejpluta.demo.util.DiceRoller;
+
+public class MeleeWeapon {
+	private final Random random = new Random();
+	private final DiceRoller roller;
+
+	@Getter
+	private String name;
+
+	@Getter
+	private int cooldown;
+
+	public MeleeWeapon(MeleeWeaponModel template) {
+		this.name = template.getName();
+		this.roller = DiceRoller.of(template.getDamage());
+		this.cooldown = template.getCooldown();
+	}
+
+	public void attack(Character character) {
+		character.hit(roller.roll());
+	}
+}