Implement technique points

Currently all destructible props restore technique points

src/main/java/emu/lunarcore/GameConstants.java

@@ -16,6 +16,7 @@ public class GameConstants {
     public static final int MAX_STAMINA = 240;
     public static final int MAX_AVATARS_IN_TEAM = 4;
     public static final int DEFAULT_TEAMS = 6;
+    public static final int MAX_MP = 5; // Client doesnt like more than 5
 
     // Custom
     public static final int SERVER_CONSOLE_UID = 99;

src/main/java/emu/lunarcore/game/battle/BattleService.java

@@ -34,6 +34,7 @@ public class BattleService extends BaseGameService {
     public void startBattle(Player player, int attackerId, RepeatedInt attackedList) {
         // Sanity check to make sure player isnt in a battle
         if (player.isInBattle()) {
+            player.sendPacket(new PacketSceneCastSkillScRsp(1));
             return;
         }
         
@@ -64,7 +65,7 @@ public class BattleService extends BaseGameService {
             }
         }
         
-        // Give the client an error if not attacked entities detected
+        // Give the client an error if no attacked entities detected
         if (entities.size() == 0) {
             player.sendPacket(new PacketSceneCastSkillScRsp(1));
             return;

src/main/java/emu/lunarcore/game/player/LineupManager.java

@@ -17,6 +17,7 @@ public class LineupManager {
     private PlayerLineup[] lineups;
     private int currentIndex;
     private int currentLeader;
+    private int mp;
     
     // Extra lineups for challenges/simulated universe/etc
     private transient int currentExtraLineup;
@@ -29,10 +30,19 @@ public class LineupManager {
 
     public LineupManager(Player player) {
         this();
-
+        this.mp = 5;
         this.validate(player);
     }
     
+    public void addMp(int i) {
+        this.mp = Math.min(this.mp + i, GameConstants.MAX_MP);
+        this.getPlayer().sendPacket(new PacketSyncLineupNotify(player.getCurrentLineup()));
+    }
+    
+    public void removeMp(int i) {
+        this.mp = Math.max(this.mp - i, 0);
+    }
+    
     public PlayerLineup getLineupByIndex(int index, int extraLineup) {
         // Sanity
         if (extraLineup > 0) {

src/main/java/emu/lunarcore/game/player/PlayerLineup.java

@@ -86,7 +86,8 @@ public class PlayerLineup {
                 .setIndex(index)
                 .setName(this.getName())
                 .setLeaderSlot(this.getOwner().getLineupManager().getCurrentLeader())
-                .setTechniquePoints(5)
+                .setMp(this.getOwner().getLineupManager().getMp())
+                .setMaxMp(GameConstants.MAX_MP)
                 .setExtraLineupType(ExtraLineupType.LINEUP_NONE);
 
         for (int slot = 0; slot < this.getAvatars().size(); slot++) {

src/main/java/emu/lunarcore/game/scene/Scene.java

@@ -224,6 +224,8 @@ public class Scene {
         // Set entity id and add monster to entity map
         entity.setEntityId(this.getNextEntityId());
         this.entities.put(entity.getEntityId(), entity);
+        // Entity add callback
+        entity.onAdd(this);
     }
     
     public synchronized void removeEntity(GameEntity entity) {
@@ -234,6 +236,9 @@ public class Scene {
         GameEntity entity = this.entities.remove(entityId);
 
         if (entity != null) {
+            // Entity remove callback
+            entity.onRemove(this);
+            // Send packet
             player.sendPacket(new PacketSceneGroupRefreshScNotify(null, entity));
         }
     }

src/main/java/emu/lunarcore/game/scene/entity/EntityProp.java

@@ -3,6 +3,7 @@ package emu.lunarcore.game.scene.entity;
 import emu.lunarcore.data.excel.NpcMonsterExcel;
 import emu.lunarcore.data.excel.StageExcel;
 import emu.lunarcore.game.enums.PropState;
+import emu.lunarcore.game.scene.Scene;
 import emu.lunarcore.proto.MotionInfoOuterClass.MotionInfo;
 import emu.lunarcore.proto.SceneEntityInfoOuterClass.SceneEntityInfo;
 import emu.lunarcore.proto.SceneNpcMonsterInfoOuterClass.SceneNpcMonsterInfo;
@@ -29,6 +30,12 @@ public class EntityProp implements GameEntity {
         this.rot = new Position();
         this.state = PropState.Closed;
     }
+    
+    @Override
+    public void onRemove(Scene scene) {
+        // TODO Debug
+        scene.getPlayer().getLineupManager().addMp(2);
+    }
 
     @Override
     public SceneEntityInfo toSceneEntityProto() {

src/main/java/emu/lunarcore/game/scene/entity/GameEntity.java

@@ -1,5 +1,6 @@
 package emu.lunarcore.game.scene.entity;
 
+import emu.lunarcore.game.scene.Scene;
 import emu.lunarcore.proto.SceneEntityInfoOuterClass.SceneEntityInfo;
 
 public interface GameEntity {
@@ -15,7 +16,14 @@ public interface GameEntity {
     public default int getInstId() {
         return 0;
     }
+    
+    public default void onAdd(Scene scene) {
+        
+    }
+
+    public default void onRemove(Scene scene) {
+        
+    }
 
     public SceneEntityInfo toSceneEntityProto();
-
 }

src/main/java/emu/lunarcore/server/packet/recv/HandlerSceneCastSkillCsReq.java

@@ -13,7 +13,11 @@ public class HandlerSceneCastSkillCsReq extends PacketHandler {
     @Override
     public void handle(GameSession session, byte[] header, byte[] data) throws Exception {
         var req = SceneCastSkillCsReq.parseFrom(data);
-
+        
+        if (req.getSkillIndex() > 0 && session.getPlayer().getScene().getAvatarEntityIds().contains(req.getAttackerId())) {
+            session.getPlayer().getLineupManager().removeMp(1);
+        }
+        
         if (req.hasAttackedEntityIdList()) {
             session.getServer().getBattleService().startBattle(session.getPlayer(), req.getAttackerId(), req.getAttackedEntityIdList());
         } else {