Turn brain behavior into a component/system (#5281)

Content.Shared/Body/Components/SharedMechanismComponent.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using Content.Shared.Body.Behavior;
+using Content.Shared.Body.Events;
 using Content.Shared.Body.Part;
 using Robust.Shared.GameObjects;
 using Robust.Shared.IoC;
@@ -168,12 +169,14 @@ namespace Content.Shared.Body.Components
             }
         }
 
-        // TODO BODY Turn these into event listeners so they dont need to be exposed
         public void AddedToBody(SharedBodyComponent body)
         {
             DebugTools.AssertNotNull(Body);
             DebugTools.AssertNotNull(body);
 
+            var ev = new AddedToBodyEvent(body);
+            Owner.EntityManager.EventBus.RaiseLocalEvent(OwnerUid, ev, false);
+
             foreach (var behavior in _behaviors.Values)
             {
                 behavior.AddedToBody(body);
@@ -187,6 +190,9 @@ namespace Content.Shared.Body.Components
 
             Owner.Transform.AttachParent(part.Owner);
 
+            var ev = new AddedToPartEvent(part);
+            Owner.EntityManager.EventBus.RaiseLocalEvent(OwnerUid, ev, false);
+
             foreach (var behavior in _behaviors.Values)
             {
                 behavior.AddedToPart(part);
@@ -202,6 +208,9 @@ namespace Content.Shared.Body.Components
 
             Owner.Transform.AttachParent(part.Owner);
 
+            var ev = new AddedToPartInBodyEvent(body, part);
+            Owner.EntityManager.EventBus.RaiseLocalEvent(OwnerUid, ev, false);
+
             foreach (var behavior in _behaviors.Values)
             {
                 behavior.AddedToPartInBody(body, part);
@@ -213,6 +222,9 @@ namespace Content.Shared.Body.Components
             DebugTools.AssertNull(Body);
             DebugTools.AssertNotNull(old);
 
+            var ev = new RemovedFromBodyEvent(old);
+            Owner.EntityManager.EventBus.RaiseLocalEvent(OwnerUid, ev, false);
+
             foreach (var behavior in _behaviors.Values)
             {
                 behavior.RemovedFromBody(old);
@@ -226,6 +238,9 @@ namespace Content.Shared.Body.Components
 
             Owner.Transform.AttachToGridOrMap();
 
+            var ev = new RemovedFromPartEvent(old);
+            Owner.EntityManager.EventBus.RaiseLocalEvent(OwnerUid, ev, false);
+
             foreach (var behavior in _behaviors.Values)
             {
                 behavior.RemovedFromPart(old);
@@ -241,6 +256,9 @@ namespace Content.Shared.Body.Components
 
             Owner.Transform.AttachToGridOrMap();
 
+            var ev = new RemovedFromPartInBodyEvent(oldBody, oldPart);
+            Owner.EntityManager.EventBus.RaiseLocalEvent(OwnerUid, ev, false);
+
             foreach (var behavior in _behaviors.Values)
             {
                 behavior.RemovedFromPartInBody(oldBody, oldPart);

Content.Shared/Body/Events/MechanismBodyEvents.cs

@@ -0,0 +1,90 @@
+using Content.Shared.Body.Components;
+using Robust.Shared.GameObjects;
+
+namespace Content.Shared.Body.Events
+{
+    // All of these events are raised on a mechanism entity when added/removed to a body in different
+    // ways.
+
+    /// <summary>
+    ///     Raised on a mechanism when it is added to a body.
+    /// </summary>
+    public class AddedToBodyEvent : EntityEventArgs
+    {
+        public SharedBodyComponent Body;
+
+        public AddedToBodyEvent(SharedBodyComponent body)
+        {
+            Body = body;
+        }
+    }
+
+    /// <summary>
+    ///     Raised on a mechanism when it is added to a body part.
+    /// </summary>
+    public class AddedToPartEvent : EntityEventArgs
+    {
+        public SharedBodyPartComponent Part;
+
+        public AddedToPartEvent(SharedBodyPartComponent part)
+        {
+            Part = part;
+        }
+    }
+
+    /// <summary>
+    ///     Raised on a mechanism when it is added to a body part within a body.
+    /// </summary>
+    public class AddedToPartInBodyEvent : EntityEventArgs
+    {
+        public SharedBodyComponent Body;
+        public SharedBodyPartComponent Part;
+
+        public AddedToPartInBodyEvent(SharedBodyComponent body, SharedBodyPartComponent part)
+        {
+            Body = body;
+            Part = part;
+        }
+    }
+
+    /// <summary>
+    ///     Raised on a mechanism when it is removed from a body.
+    /// </summary>
+    public class RemovedFromBodyEvent : EntityEventArgs
+    {
+        public SharedBodyComponent Old;
+
+        public RemovedFromBodyEvent(SharedBodyComponent old)
+        {
+            Old = old;
+        }
+    }
+
+    /// <summary>
+    ///     Raised on a mechanism when it is removed from a body part.
+    /// </summary>
+    public class RemovedFromPartEvent : EntityEventArgs
+    {
+        public SharedBodyPartComponent Old;
+
+        public RemovedFromPartEvent(SharedBodyPartComponent old)
+        {
+            Old = old;
+        }
+    }
+
+    /// <summary>
+    ///     Raised on a mechanism when it is removed from a body part within a body.
+    /// </summary>
+    public class RemovedFromPartInBodyEvent : EntityEventArgs
+    {
+        public SharedBodyComponent OldBody;
+        public SharedBodyPartComponent OldPart;
+
+        public RemovedFromPartInBodyEvent(SharedBodyComponent oldBody, SharedBodyPartComponent oldPart)
+        {
+            OldBody = oldBody;
+            OldPart = oldPart;
+        }
+    }
+}