Add weightlessness status effect. (#2384)

* Add weightlessness status effect.

* remove system, add new action

* Update Content.Shared/GameObjects/Components/Mobs/SharedWeightlessStatusComponent.cs

Co-authored-by: Paul Ritter <ritter.paul1@googlemail.com>

* Update Content.Shared/GameObjects/Components/Mobs/SharedWeightlessStatusComponent.cs

Co-authored-by: Paul Ritter <ritter.paul1@googlemail.com>

* Update Content.Shared/GameObjects/Components/Movement/MovementIgnoreGravityComponent.cs

Co-authored-by: Paul Ritter <ritter.paul1@googlemail.com>

* Update Content.Shared/GameObjects/Components/Movement/MovementIgnoreGravityComponent.cs

Co-authored-by: Paul Ritter <ritter.paul1@googlemail.com>

* fix paul's typo. does not run.

* add client side component

* move logic to eventbus

* remove client/server components and clean up code

* remove useless component, revert human.yml changes.

Co-authored-by: scuffedjays <yetanotherscuffed@gmail.com>
Co-authored-by: Paul Ritter <ritter.paul1@googlemail.com>

Content.Server/GameObjects/EntitySystems/WeightlessStatusSystem.cs

@@ -0,0 +1,35 @@
+using Content.Shared.GameObjects.Components.Mobs;
+using Content.Shared.GameObjects.EntitySystemMessages;
+using Robust.Shared.GameObjects.Systems;
+
+namespace Content.Shared.GameObjects.EntitySystems
+{
+
+    public sealed class WeightlessStatusSystem : EntitySystem
+    {
+
+        public override void Initialize()
+        {
+            base.Initialize();
+            SubscribeLocalEvent<WeightlessChangeMessage>(HandleWeightlessChanged);
+        }
+
+        private void HandleWeightlessChanged(WeightlessChangeMessage msg)
+        {
+            var ent = msg.Entity;
+            if (!ent.TryGetComponent(out SharedStatusEffectsComponent status))
+            {
+                return;
+            }
+
+            if(msg.Weightless)
+            {
+                status.ChangeStatusEffect(StatusEffect.Weightless,"/Textures/Interface/StatusEffects/Weightless/weightless.png",null);
+            }
+            else
+            {
+                status.RemoveStatusEffect(StatusEffect.Weightless);
+            }
+        }
+    }
+}

Content.Shared/GameObjects/Components/Mobs/SharedStatusEffectsComponent.cs

@@ -68,6 +68,7 @@ namespace Content.Shared.GameObjects.Components.Mobs
         Buckled,
         Piloting,
         Pulling,
-        Pulled
+        Pulled,
+        Weightless
     }
 }

Content.Shared/GameObjects/Components/Movement/MovementIgnoreGravityComponent.cs

@@ -1,8 +1,11 @@
 #nullable enable
+using System;
+using Content.Shared.GameObjects.Components.Mobs;
 using Robust.Shared.GameObjects;
 using Robust.Shared.Interfaces.GameObjects;
 using Robust.Shared.Interfaces.Physics;
 using Robust.Shared.IoC;
+using Content.Shared.GameObjects.EntitySystemMessages;
 
 namespace Content.Shared.GameObjects.Components.Movement
 {
@@ -18,8 +21,10 @@ namespace Content.Shared.GameObjects.Components.Movement
         {
             physicsManager ??= IoCManager.Resolve<IPhysicsManager>();
 
-            return !entity.HasComponent<MovementIgnoreGravityComponent>() &&
+            var isWeightless = !entity.HasComponent<MovementIgnoreGravityComponent>() &&
                    physicsManager.IsWeightless(entity.Transform.Coordinates);
+            entity.EntityManager.EventBus.RaiseEvent(EventSource.Local, new WeightlessChangeMessage(entity,isWeightless));
+            return isWeightless;
         }
     }
 }

Content.Shared/GameObjects/EntitySystemMessages/WeightlessChangeMessage.cs

@@ -0,0 +1,21 @@
+using System;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.GameObjects.EntitySystemMessages
+{
+    [Serializable, NetSerializable]
+    public sealed class WeightlessChangeMessage : EntitySystemMessage
+    {
+        public readonly IEntity Entity;
+        public readonly bool Weightless;
+
+        public WeightlessChangeMessage(IEntity ent, bool isNowWeightless)
+        {
+            Entity = ent;
+            Weightless = isNowWeightless;
+        }
+    }
+
+}