Remove serverside StandingStateSystem (#35999)

Refactor system

Content.Server/Hands/Systems/HandsSystem.cs

@@ -15,10 +15,12 @@ using Content.Shared.Movement.Pulling.Components;
 using Content.Shared.Movement.Pulling.Events;
 using Content.Shared.Movement.Pulling.Systems;
 using Content.Shared.Stacks;
+using Content.Shared.Standing;
 using Content.Shared.Throwing;
 using Robust.Shared.GameStates;
 using Robust.Shared.Input.Binding;
 using Robust.Shared.Map;
+using Robust.Shared.Physics.Components;
 using Robust.Shared.Player;
 using Robust.Shared.Random;
 using Robust.Shared.Timing;
@@ -53,6 +55,8 @@ namespace Content.Server.Hands.Systems
 
             SubscribeLocalEvent<HandsComponent, BeforeExplodeEvent>(OnExploded);
 
+            SubscribeLocalEvent<HandsComponent, DropHandItemsEvent>(OnDropHandItems);
+
             CommandBinds.Builder
                 .Bind(ContentKeyFunctions.ThrowItemInHand, new PointerInputCmdHandler(HandleThrowItem))
                 .Register<HandsSystem>();
@@ -228,6 +232,36 @@ namespace Content.Server.Hands.Systems
             return true;
         }
 
+        private void OnDropHandItems(Entity<HandsComponent> entity, ref DropHandItemsEvent args)
+        {
+            var direction = EntityManager.TryGetComponent(entity, out PhysicsComponent? comp) ? comp.LinearVelocity / 50 : Vector2.Zero;
+            var dropAngle = _random.NextFloat(0.8f, 1.2f);
+
+            var fellEvent = new FellDownEvent(entity);
+            RaiseLocalEvent(entity, fellEvent, false);
+
+            var worldRotation = TransformSystem.GetWorldRotation(entity).ToVec();
+            foreach (var hand in entity.Comp.Hands.Values)
+            {
+                if (hand.HeldEntity is not EntityUid held)
+                    continue;
+
+                var throwAttempt = new FellDownThrowAttemptEvent(entity);
+                RaiseLocalEvent(hand.HeldEntity.Value, ref throwAttempt);
+
+                if (throwAttempt.Cancelled)
+                    continue;
+
+                if (!TryDrop(entity, hand, null, checkActionBlocker: false, handsComp: entity.Comp))
+                    continue;
+
+                _throwingSystem.TryThrow(held,
+                    _random.NextAngle().RotateVec(direction / dropAngle + worldRotation / 50),
+                    0.5f * dropAngle * _random.NextFloat(-0.9f, 1.1f),
+                    entity, 0);
+            }
+        }
+
         #endregion
     }
 }

Content.Server/Standing/StandingStateSystem.cs

@@ -1,63 +0,0 @@
-using System.Numerics;
-using Content.Shared.Hands.Components;
-using Content.Shared.Hands.EntitySystems;
-using Content.Shared.Standing;
-using Content.Shared.Throwing;
-using Robust.Shared.Physics.Components;
-using Robust.Shared.Random;
-
-namespace Content.Server.Standing;
-
-public sealed class StandingStateSystem : EntitySystem
-{
-    [Dependency] private readonly IRobustRandom _random = default!;
-    [Dependency] private readonly SharedHandsSystem _handsSystem = default!;
-    [Dependency] private readonly ThrowingSystem _throwingSystem = default!;
-    [Dependency] private readonly SharedTransformSystem _transformSystem = default!;
-
-    private void FallOver(EntityUid uid, StandingStateComponent component, DropHandItemsEvent args)
-    {
-        var direction = EntityManager.TryGetComponent(uid, out PhysicsComponent? comp) ? comp.LinearVelocity / 50 : Vector2.Zero;
-        var dropAngle = _random.NextFloat(0.8f, 1.2f);
-
-        var fellEvent = new FellDownEvent(uid);
-        RaiseLocalEvent(uid, fellEvent, false);
-
-        if (!TryComp(uid, out HandsComponent? handsComp))
-            return;
-
-        var worldRotation = _transformSystem.GetWorldRotation(uid).ToVec();
-        foreach (var hand in handsComp.Hands.Values)
-        {
-            if (hand.HeldEntity is not EntityUid held)
-                continue;
-
-            if (!_handsSystem.TryDrop(uid, hand, null, checkActionBlocker: false, handsComp: handsComp))
-                continue;
-
-            _throwingSystem.TryThrow(held,
-                _random.NextAngle().RotateVec(direction / dropAngle + worldRotation / 50),
-                0.5f * dropAngle * _random.NextFloat(-0.9f, 1.1f),
-                uid, 0);
-        }
-    }
-
-    public override void Initialize()
-    {
-        base.Initialize();
-        SubscribeLocalEvent<StandingStateComponent, DropHandItemsEvent>(FallOver);
-    }
-
-}
-
-    /// <summary>
-    /// Raised after an entity falls down.
-    /// </summary>
-    public sealed class FellDownEvent : EntityEventArgs
-    {
-        public EntityUid Uid { get; }
-        public FellDownEvent(EntityUid uid)
-        {
-            Uid = uid;
-        }
-    }

Content.Shared/Standing/StandingStateSystem.cs

@@ -1,13 +1,12 @@
 using Content.Shared.Hands.Components;
 using Content.Shared.Physics;
 using Content.Shared.Rotation;
-using Robust.Shared.Audio;
 using Robust.Shared.Audio.Systems;
 using Robust.Shared.Physics;
 using Robust.Shared.Physics.Systems;
 
-namespace Content.Shared.Standing
+namespace Content.Shared.Standing;
-{
+
 public sealed class StandingStateSystem : EntitySystem
 {
     [Dependency] private readonly SharedAppearanceSystem _appearance = default!;
@@ -49,7 +48,8 @@ namespace Content.Shared.Standing
         // and ultimately this is just to avoid boilerplate in Down callers + keep their behavior consistent.
         if (dropHeldItems && hands != null)
         {
-                RaiseLocalEvent(uid, new DropHandItemsEvent(), false);
+            var ev = new DropHandItemsEvent();
+            RaiseLocalEvent(uid, ref ev, false);
         }
 
         if (!force)
@@ -138,9 +138,8 @@ namespace Content.Shared.Standing
     }
 }
 
-    public sealed class DropHandItemsEvent : EventArgs
+[ByRefEvent]
-    {
+public record struct DropHandItemsEvent();
-    }
 
 /// <summary>
 /// Subscribe if you can potentially block a down attempt.
@@ -169,4 +168,24 @@ namespace Content.Shared.Standing
 public sealed class DownedEvent : EntityEventArgs
 {
 }
+
+/// <summary>
+/// Raised after an entity falls down.
+/// </summary>
+public sealed class FellDownEvent : EntityEventArgs
+{
+    public EntityUid Uid { get; }
+
+    public FellDownEvent(EntityUid uid)
+    {
+        Uid = uid;
     }
+}
+
+/// <summary>
+/// Raised on the entity being thrown due to the holder falling down.
+/// </summary>
+[ByRefEvent]
+public record struct FellDownThrowAttemptEvent(EntityUid Thrower, bool Cancelled = false);
+
+