Lawyer badge changes typing indicator (#13445)

Content.Shared/Chat/TypingIndicator/SharedTypingIndicatorSystem.cs

@@ -1,9 +1,42 @@
-namespace Content.Shared.Chat.TypingIndicator;
+using Content.Shared.Clothing.Components;
+using Content.Shared.Inventory.Events;
+
+namespace Content.Shared.Chat.TypingIndicator;
 
 /// <summary>
 ///     Sync typing indicator icon between client and server.
 /// </summary>
 public abstract class SharedTypingIndicatorSystem : EntitySystem
 {
+    /// <summary>
+    ///     Default ID of <see cref="TypingIndicatorPrototype"/>
+    /// </summary>
+    public const string InitialIndicatorId = "default";
+    
+    public override void Initialize()
+    {
+        base.Initialize();
+        SubscribeLocalEvent<TypingIndicatorClothingComponent, GotEquippedEvent>(OnGotEquipped);
+        SubscribeLocalEvent<TypingIndicatorClothingComponent, GotUnequippedEvent>(OnGotUnequipped);
+    }
 
+    private void OnGotEquipped(EntityUid uid, TypingIndicatorClothingComponent component, GotEquippedEvent args)
+    {
+        if (!TryComp<ClothingComponent>(uid, out var clothing) ||
+            !TryComp<TypingIndicatorComponent>(args.Equipee, out var indicator))
+            return;
+        
+        var isCorrectSlot = clothing.Slots.HasFlag(args.SlotFlags);
+        if (!isCorrectSlot) return;
+
+        indicator.Prototype = component.Prototype;
+    }
+
+    private void OnGotUnequipped(EntityUid uid, TypingIndicatorClothingComponent component, GotUnequippedEvent args)
+    {
+        if (!TryComp<TypingIndicatorComponent>(args.Equipee, out var indicator))
+            return;
+
+        indicator.Prototype = SharedTypingIndicatorSystem.InitialIndicatorId;
+    }
 }