Make projectiles not hit crit mobs unless clicked on (#27905)

Content.Shared/Mobs/Systems/MobStateSystem.Subscribers.cs

@@ -10,12 +10,15 @@ using Content.Shared.Item;
 using Content.Shared.Mobs.Components;
 using Content.Shared.Movement.Events;
 using Content.Shared.Pointing;
+using Content.Shared.Projectiles;
 using Content.Shared.Pulling.Events;
 using Content.Shared.Speech;
 using Content.Shared.Standing;
 using Content.Shared.Strip.Components;
 using Content.Shared.Throwing;
+using Content.Shared.Weapons.Ranged.Components;
 using Robust.Shared.Physics.Components;
+using Robust.Shared.Physics.Events;
 
 namespace Content.Shared.Mobs.Systems;
 
@@ -43,6 +46,7 @@ public partial class MobStateSystem
         SubscribeLocalEvent<MobStateComponent, TryingToSleepEvent>(OnSleepAttempt);
         SubscribeLocalEvent<MobStateComponent, CombatModeShouldHandInteractEvent>(OnCombatModeShouldHandInteract);
         SubscribeLocalEvent<MobStateComponent, AttemptPacifiedAttackEvent>(OnAttemptPacifiedAttack);
+        SubscribeLocalEvent<MobStateComponent, PreventCollideEvent>(OnPreventCollide);
     }
 
     private void OnStateExitSubscribers(EntityUid target, MobStateComponent component, MobState state)
@@ -175,5 +179,21 @@ public partial class MobStateSystem
         args.Cancelled = true;
     }
 
+    private void OnPreventCollide(Entity<MobStateComponent> ent, ref PreventCollideEvent args)
+    {
+        if (args.Cancelled)
+            return;
+
+        if (IsAlive(ent, ent))
+            return;
+
+        var other = args.OtherEntity;
+        if (HasComp<ProjectileComponent>(other) &&
+            CompOrNull<TargetedProjectileComponent>(other)?.Target != ent.Owner)
+        {
+            args.Cancelled = true;
+        }
+    }
+
     #endregion
 }