Prevent borgs from getting duplicate modules (#28943)

* Prevent borgs from getting duplicate modules

* outta the loop

---------

Co-authored-by: plykiya <plykiya@protonmail.com>

Content.Server/Silicons/Borgs/BorgSystem.Modules.cs

@@ -274,6 +274,25 @@ public sealed partial class BorgSystem
             return false;
         }
 
+        if (TryComp<ItemBorgModuleComponent>(module, out var itemModuleComp))
+        {
+            foreach (var containedModuleUid in component.ModuleContainer.ContainedEntities)
+            {
+                if (!TryComp<ItemBorgModuleComponent>(containedModuleUid, out var containedItemModuleComp))
+                    continue;
+
+                for (int i = 0; i < itemModuleComp.Items.Count; i++)
+                {
+                    if (itemModuleComp.Items[i] != containedItemModuleComp.Items[i])
+                        continue;
+                }
+
+                if (user != null)
+                    Popup.PopupEntity(Loc.GetString("borg-module-duplicate"), uid, user.Value);
+                return false;
+            }
+        }
+
         return true;
     }
 

Resources/Locale/en-US/borg/borg.ftl

@@ -1,4 +1,4 @@
-borg-player-not-allowed = The brain doesn't fit!
+borg-player-not-allowed = The brain doesn't fit!
 borg-player-not-allowed-eject = The brain was expelled from the chassis!
 
 borg-panel-not-open = The cyborg's panel isn't open...
@@ -7,6 +7,7 @@ borg-mind-added = {CAPITALIZE($name)} powered on!
 borg-mind-removed = {CAPITALIZE($name)} shut off!
 
 borg-module-too-many = There's not enough room for another module...
+borg-module-duplicate = This module is already installed in this cyborg.
 borg-module-whitelist-deny = This module doesn't fit in this type of cyborg...
 
 borg-construction-guide-string = The cyborg limbs and torso must be attached to the endoskeleton.