feat: add hero target

Client/Domain/Service/EntityHandler.cs

@@ -43,6 +43,15 @@ namespace Client.Domain.Service
             }
         }
 
+        public T? GetEntity(uint id)
+        {
+            T? result = null;
+
+            entities.TryGetValue(id, out result);
+
+            return result;
+        }
+
         public virtual void OnCreate(T entity)
         {
 

Client/Domain/Service/HeroHandler.cs

@@ -10,12 +10,13 @@ using System.Threading.Tasks;
 
 namespace Client.Domain.Service
 {
-    public class HeroHandler : EntityHandler<Hero>
+    public class HeroHandler : EntityHandler<Hero>, EventHandlerInterface<TargetChangedEvent>
     {
         public override void OnCreate(Hero entity)
         {
             entity.ExperienceInfo.ExpToLevel = experienceHelper.GetExperienceToLevel(entity.ExperienceInfo.Level + 1);
             entity.ExperienceInfo.ExpToPrevLevel = experienceHelper.GetExperienceToLevel(entity.ExperienceInfo.Level);
+            entity.PropertyChanged += Hero_PropertyChanged;
             eventBus.Publish(new HeroCreatedEvent(entity));
         }
 
@@ -39,6 +40,31 @@ namespace Client.Domain.Service
             this.experienceHelper = experienceHelper;
         }
 
+        private void Hero_PropertyChanged(object? sender, System.ComponentModel.PropertyChangedEventArgs e)
+        {
+            if (sender == null)
+            {
+                return;
+            }
+
+            var hero = (Hero)sender;
+            if (e.PropertyName == "TargetId")
+            {
+                hero.Target = null;
+                eventBus.Publish(new TargetChangedEvent(hero));
+            }
+        }
+
+        public void Handle(TargetChangedEvent @event)
+        {
+            var target = GetEntity(@event.Hero.TargetId);
+            if (target == null)
+            {
+                return;
+            }
+            @event.Hero.Target = target;
+        }
+
         private readonly EventBusInterface eventBus;
         private readonly ExperienceHelperInterface experienceHelper;
     }

Client/Domain/Service/NpcHandler.cs

@@ -10,7 +10,7 @@ using System.Threading.Tasks;
 
 namespace Client.Domain.Service
 {
-    public class NpcHandler : EntityHandler<NPC>
+    public class NpcHandler : EntityHandler<NPC>, EventHandlerInterface<TargetChangedEvent>
     {
         public override void OnCreate(NPC entity)
         {
@@ -23,6 +23,16 @@ namespace Client.Domain.Service
             eventBus.Publish(new CreatureDeletedEvent(entity.Id));
         }
 
+        public void Handle(TargetChangedEvent @event)
+        {
+            var target = GetEntity(@event.Hero.TargetId);
+            if (target == null)
+            {
+                return;
+            }
+            @event.Hero.Target = target;
+        }
+
         public NpcHandler(EntityFactoryInterface<NPC> factory, EventBusInterface eventBus, NpcInfoHelperInterface npcInfoHelper) : base(factory)
         {
             this.eventBus = eventBus;

Client/Domain/Service/PlayerHandler.cs

@@ -9,7 +9,7 @@ using System.Threading.Tasks;
 
 namespace Client.Domain.Service
 {
-    public class PlayerHandler : EntityHandler<Player>
+    public class PlayerHandler : EntityHandler<Player>, EventHandlerInterface<TargetChangedEvent>
     {
         public override void OnCreate(Player entity)
         {
@@ -25,6 +25,16 @@ namespace Client.Domain.Service
             this.eventBus = eventBus;
         }
 
+        public void Handle(TargetChangedEvent @event)
+        {
+            var target = GetEntity(@event.Hero.TargetId);
+            if (target == null)
+            {
+                return;
+            }
+            @event.Hero.Target = target;
+        }
+
         private readonly EventBusInterface eventBus;
     }
 }