Can't break other people's drags on cuffed people (#8868)

* works on my machine

* speedrun

Content.Shared/Cuffs/SharedCuffableSystem.cs

@@ -7,6 +7,7 @@ using Content.Shared.Item;
 using Content.Shared.Movement;
 using Content.Shared.Physics.Pull;
 using Content.Shared.Pulling.Components;
+using Content.Shared.Pulling.Events;
 
 namespace Content.Shared.Cuffs
 {
@@ -25,10 +26,20 @@ namespace Content.Shared.Cuffs
             SubscribeLocalEvent<SharedCuffableComponent, IsUnequippingAttemptEvent>(OnUnequipAttempt);
             SubscribeLocalEvent<SharedCuffableComponent, DropAttemptEvent>(OnDropAttempt);
             SubscribeLocalEvent<SharedCuffableComponent, PickupAttemptEvent>(OnPickupAttempt);
+            SubscribeLocalEvent<SharedCuffableComponent, BeingPulledAttemptEvent>(OnBeingPulledAttempt);
             SubscribeLocalEvent<SharedCuffableComponent, PullStartedMessage>(OnPull);
             SubscribeLocalEvent<SharedCuffableComponent, PullStoppedMessage>(OnPull);
         }
 
+
+        private void OnBeingPulledAttempt(EntityUid uid, SharedCuffableComponent component, BeingPulledAttemptEvent args)
+        {
+            if (!TryComp<SharedPullableComponent>(uid, out var pullable))
+                return;
+
+            if (pullable.Puller != null && !component.CanStillInteract) // If we are being pulled already and cuffed, we can't get pulled again.
+                args.Cancel();
+        }
         private void OnPull(EntityUid uid, SharedCuffableComponent component, PullMessage args)
         {
             if (!component.CanStillInteract)

Content.Shared/Pulling/Events/BeingPulledAttemptEvent.cs

@@ -0,0 +1,17 @@
+namespace Content.Shared.Pulling.Events
+{
+    /// <summary>
+    ///     Directed event raised on the pulled to see if it can be pulled.
+    /// </summary>
+    public sealed class BeingPulledAttemptEvent : CancellableEntityEventArgs
+    {
+        public BeingPulledAttemptEvent(EntityUid puller, EntityUid pulled)
+        {
+            Puller = puller;
+            Pulled = pulled;
+        }
+
+        public EntityUid Puller { get; }
+        public EntityUid Pulled { get; }
+    }
+}

Content.Shared/Pulling/Systems/SharedPullingSystem.Actions.cs

@@ -55,9 +55,11 @@ namespace Content.Shared.Pulling
                 }
             }
 
+            var getPulled = new BeingPulledAttemptEvent(puller, pulled);
+            RaiseLocalEvent(pulled, getPulled);
             var startPull = new StartPullAttemptEvent(puller, pulled);
             RaiseLocalEvent(puller, startPull);
-            return !startPull.Cancelled;
+            return (!startPull.Cancelled && !getPulled.Cancelled);
         }
 
         public bool TogglePull(EntityUid puller, SharedPullableComponent pullable)