Implement block deletion/creation ; Remove StageClearedEvent

Signed-off-by: pacien <pacien.trangirard@pacien.net>

6 files changed, 43 insertions, 29 deletions

diff --git a/src/main/java/fr/umlv/java/wallj/block/Block.java b/src/main/java/fr/umlv/java/wallj/block/Block.java
index 7ae9c06..003c782 100644
--- a/src/main/java/fr/umlv/java/wallj/block/Block.java
+++ b/src/main/java/fr/umlv/java/wallj/block/Block.java
@@ -45,4 +45,9 @@ public abstract class Block implements Updateable {
    * @param world a JBox2D world
    */
   public abstract void link(World world);
+
+  /**
+   * @param world a JBox2D world
+   */
+  public abstract void unlink(World world);
 }
diff --git a/src/main/java/fr/umlv/java/wallj/block/JBoxBlock.java b/src/main/java/fr/umlv/java/wallj/block/JBoxBlock.java
index 06ecca3..f0f2834 100644
--- a/src/main/java/fr/umlv/java/wallj/block/JBoxBlock.java
+++ b/src/main/java/fr/umlv/java/wallj/block/JBoxBlock.java
@@ -33,4 +33,10 @@ public abstract class JBoxBlock extends Block {
     body.createFixture(fixtureDef);
     body.setUserData(this);
   }
+
+  @Override
+  public void unlink(World world) {
+    if (body == null) throw new IllegalStateException("Block has not yet been linked.");
+    world.destroyBody(body);
+  }
 }
diff --git a/src/main/java/fr/umlv/java/wallj/block/RobotBlock.java b/src/main/java/fr/umlv/java/wallj/block/RobotBlock.java
index 7d370e5..45ed5bd 100644
--- a/src/main/java/fr/umlv/java/wallj/block/RobotBlock.java
+++ b/src/main/java/fr/umlv/java/wallj/block/RobotBlock.java
@@ -45,6 +45,11 @@ public class RobotBlock extends Block {
   }
 
   @Override
+  public void unlink(World world) {
+    // no-op
+  }
+
+  @Override
   public List<Event> update(Context context) {
     Events.findFirst(context.getEvents(), MoveRobotOrder.class)
     .ifPresent(event -> updatePath(context.getGame().getCurrentStage().getBoard(), event.getTarget()));
diff --git a/src/main/java/fr/umlv/java/wallj/context/Stage.java b/src/main/java/fr/umlv/java/wallj/context/Stage.java
index 860f451..8852568 100644
--- a/src/main/java/fr/umlv/java/wallj/context/Stage.java
+++ b/src/main/java/fr/umlv/java/wallj/context/Stage.java
@@ -1,6 +1,8 @@
 package fr.umlv.java.wallj.context;
 
 import fr.umlv.java.wallj.block.Block;
+import fr.umlv.java.wallj.block.BlockFactory;
+import fr.umlv.java.wallj.block.BlockType;
 import fr.umlv.java.wallj.board.Board;
 import fr.umlv.java.wallj.board.BoardConverter;
 import fr.umlv.java.wallj.event.*;
@@ -8,7 +10,6 @@ import org.jbox2d.common.Vec2;
 import org.jbox2d.dynamics.World;
 
 import java.time.Duration;
-import java.util.Collections;
 import java.util.List;
 import java.util.Objects;
 
@@ -23,38 +24,47 @@ public class Stage implements Updateable {
   private final Board board;
   private final List<Block> blocks;
 
+  /**
+   * @param board the base board
+   */
   public Stage(Board board) {
     this.board = Objects.requireNonNull(board);
-    this.blocks = BoardConverter.boardToWorld(board);
-    // TODO: link blocks to world
+    blocks = BoardConverter.boardToWorld(board);
+    blocks.forEach(block -> block.link(world));
   }
 
+  /**
+   * @return the JBox2D world
+   */
   public World getWorld() {
     return world;
   }
 
   /**
-   * @return the current board of the game
+   * @return the base board
    */
   public Board getBoard() {
     return board;
   }
 
-  private boolean isCleared() {
-    // TODO
-    return false;
+  /**
+   * @return T(this stage is cleared, i.e. does not contain any garbage block)
+   * @implNote TODO: profile this and consider a garbage block counter
+   */
+  public boolean isCleared() {
+    return blocks.stream().noneMatch(block -> block.getType() == BlockType.GARBAGE);
   }
 
   /**
    * @param context the current context
-   * @return a list of new events to perform
+   * @return the list of newly generated events
    */
   @Override
   public List<Event> update(Context context) {
     updatePhysicalWorld(context.getTimeDelta());
     handleBlockDestruction(context.getEvents());
     handleBlockCreation(context.getEvents());
-    return generateEvents();
+    return Updateable.updateAll(blocks, context);
   }
 
   private void updatePhysicalWorld(Duration timeDelta) {
@@ -64,18 +74,15 @@ public class Stage implements Updateable {
 
   private void handleBlockDestruction(List<Event> events) {
     Events.filter(events, BlockDestroyEvent.class).forEach(event -> {
-    }); // TODO
+      if (blocks.remove(event.getBlock())) event.getBlock().unlink(world);
+    });
   }
 
   private void handleBlockCreation(List<Event> events) {
     Events.filter(events, BlockCreateEvent.class).forEach(event -> {
-    }); // TODO
-  }
-
-  private List<Event> generateEvents() {
-    if (isCleared())
-      return Collections.singletonList(new StageClearedEvent());
-    else
-      return Collections.emptyList();
+      Block block = BlockFactory.build(event.getBlockType(), event.getPos());
+      blocks.add(block);
+      block.link(world);
+    });
   }
 }
diff --git a/src/main/java/fr/umlv/java/wallj/context/Updateable.java b/src/main/java/fr/umlv/java/wallj/context/Updateable.java
index 468fe2c..45c217e 100644
--- a/src/main/java/fr/umlv/java/wallj/context/Updateable.java
+++ b/src/main/java/fr/umlv/java/wallj/context/Updateable.java
@@ -18,9 +18,10 @@ public interface Updateable {
   /**
    * @param updateables list of updateables
    * @param context     an update context
+   * @param <T>         the updateable type
    * @return a list of collected generated events
    */
-  static List<Event> updateAll(List<Updateable> updateables, Context context) {
+  static <T extends Updateable> List<Event> updateAll(List<T> updateables, Context context) {
     return updateables.stream()
            .flatMap(u -> u.update(context).stream())
            .collect(Collectors.toList());
diff --git a/src/main/java/fr/umlv/java/wallj/event/StageClearedEvent.java b/src/main/java/fr/umlv/java/wallj/event/StageClearedEvent.java
deleted file mode 100644
index 2543ad9..0000000
--- a/src/main/java/fr/umlv/java/wallj/event/StageClearedEvent.java
+++ /dev/null
@@ -1,10 +0,0 @@
-package fr.umlv.java.wallj.event;
-
-/**
- * Signals that a stage is cleared.
- *
- * @author Pacien TRAN-GIRARD
- */
-public final class StageClearedEvent implements GameEvent {
-  // void
-}