Fix blindness and UIs (#12326)

* fix part 1

* fix blindness and BUIs

* remove extra file

Content.Server/Eye/Blinding/ActivatableUIRequiresVisionComponent.cs

@@ -0,0 +1,8 @@
+namespace Content.Server.Eye.Blinding
+{
+    [RegisterComponent]
+    public sealed class ActivatableUIRequiresVisionComponent : Component
+    {
+    }
+}
+

Content.Server/Eye/Blinding/ActivatableUIRequiresVisionSystem.cs

@@ -0,0 +1,60 @@
+using Content.Shared.Eye.Blinding;
+using Content.Server.UserInterface;
+using Content.Server.Popups;
+using Robust.Shared.Player;
+using Robust.Server.GameObjects;
+
+namespace Content.Server.Eye.Blinding
+{
+    public sealed class ActivatableUIRequiresVisionSystem : EntitySystem
+    {
+        [Dependency] private readonly ActivatableUISystem _activatableUISystem = default!;
+        [Dependency] private readonly PopupSystem _popupSystem = default!;
+        [Dependency] private readonly UserInterfaceSystem _userInterfaceSystem = default!;
+
+        public override void Initialize()
+        {
+            base.Initialize();
+            SubscribeLocalEvent<ActivatableUIRequiresVisionComponent, ActivatableUIOpenAttemptEvent>(OnOpenAttempt);
+            SubscribeLocalEvent<BlindableComponent, BlindnessChangedEvent>(OnBlindnessChanged);
+        }
+
+        private void OnOpenAttempt(EntityUid uid, ActivatableUIRequiresVisionComponent component, ActivatableUIOpenAttemptEvent args)
+        {
+            if (args.Cancelled)
+                return;
+
+            if (TryComp<BlindableComponent>(args.User, out var blindable) && blindable.Sources > 0)
+            {
+                _popupSystem.PopupCursor(Loc.GetString("blindness-fail-attempt"), Filter.Entities(args.User), Shared.Popups.PopupType.MediumCaution);
+                args.Cancel();
+            }
+        }
+
+        private void OnBlindnessChanged(EntityUid uid, BlindableComponent component, BlindnessChangedEvent args)
+        {
+            if (!args.Blind)
+                return;
+
+            if (!TryComp<ActorComponent>(uid, out var actor))
+                return;
+
+            var uiList = _userInterfaceSystem.GetAllUIsForSession(actor.PlayerSession);
+            if (uiList == null)
+                return;
+
+            Queue<BoundUserInterface> closeList = new(); // foreach collection modified moment
+
+            foreach (var ui in uiList)
+            {
+                if (HasComp<ActivatableUIRequiresVisionComponent>(ui.Owner))
+                    closeList.Enqueue(ui);
+            }
+
+            foreach (var ui in closeList)
+            {
+                _userInterfaceSystem.CloseUi(ui, actor.PlayerSession);
+            }
+        }
+    }
+}

Content.Shared/Eye/Blinding/SharedBlindingSystem.cs

@@ -103,9 +103,21 @@ namespace Content.Shared.Eye.Blinding
             if (!Resolve(uid, ref blindable, false))
                 return;
 
+            var oldSources = blindable.Sources;
+
             blindable.Sources += amount;
             blindable.Sources = Math.Max(blindable.Sources, 0);
 
+            if (oldSources == 0 && blindable.Sources > 0)
+            {
+                var ev = new BlindnessChangedEvent(true);
+                RaiseLocalEvent(uid, ev, false);
+            } else if (blindable.Sources == 0 && oldSources > 0)
+            {
+                var ev = new BlindnessChangedEvent(false);
+                RaiseLocalEvent(uid, ev, false);
+            }
+
             Dirty(blindable);
         }
 
@@ -152,4 +164,17 @@ namespace Content.Shared.Eye.Blinding
             Magnitude = magnitude;
         }
     }
+
+    /// <summary>
+    ///     You became blind or lost blindess, not just changed # of sources.
+    /// </summary>
+    public sealed class BlindnessChangedEvent : EntityEventArgs
+    {
+        public bool Blind;
+
+        public BlindnessChangedEvent(bool blind)
+        {
+            Blind = blind;
+        }
+    }
 }

Resources/Locale/en-US/eye/blindness.ftl

@@ -0,0 +1 @@
+blindness-fail-attempt = You can't do that if you're blind!

Resources/Prototypes/Entities/Structures/Machines/Computers/computers.yml

@@ -687,6 +687,7 @@
     - type: ActivatableUI
       key: enum.SurveillanceCameraMonitorUiKey.Key
     - type: ActivatableUIRequiresPower
+    - type: ActivatableUIRequiresVision
     - type: Transform
       anchored: true
     - type: UserInterface
@@ -721,6 +722,7 @@
     - type: ActivatableUI
       key: enum.SurveillanceCameraMonitorUiKey.Key
     - type: ActivatableUIRequiresPower
+    - type: ActivatableUIRequiresVision
     - type: Transform
       anchored: true
     - type: UserInterface