ninja 2 electric boogaloo (#15534)

Co-authored-by: deltanedas <@deltanedas:kde.org>

Content.Server/Research/Systems/ResearchStealerSystem.cs

@@ -0,0 +1,39 @@
+using Content.Shared.Research.Components;
+using Content.Shared.Research.Systems;
+
+namespace Content.Server.Research.Systems;
+
+public sealed class ResearchStealerSystem : SharedResearchStealerSystem
+{
+    [Dependency] private readonly SharedResearchSystem _research = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<ResearchStealerComponent, ResearchStealDoAfterEvent>(OnDoAfter);
+    }
+
+    private void OnDoAfter(EntityUid uid, ResearchStealerComponent comp, ResearchStealDoAfterEvent args)
+    {
+        if (args.Cancelled || args.Handled || args.Target == null)
+            return;
+
+        var target = args.Target.Value;
+
+        if (!TryComp<TechnologyDatabaseComponent>(target, out var database))
+            return;
+
+        var ev = new ResearchStolenEvent(uid, target, database.UnlockedTechnologies);
+        RaiseLocalEvent(uid, ref ev);
+        // oops, no more advanced lasers!
+        _research.ClearTechs(target, database);
+    }
+}
+
+/// <summary>
+/// Event raised on the user when research is stolen from a R&D server.
+/// Techs contains every technology id researched.
+/// </summary>
+[ByRefEvent]
+public record struct ResearchStolenEvent(EntityUid Used, EntityUid Target, List<String> Techs);