ECS cable (#6141)

Content.Server/Power/EntitySystems/CableSystem.cs

@@ -0,0 +1,66 @@
+using Content.Server.Electrocution;
+using Content.Server.Power.Components;
+using Content.Server.Tools;
+using Content.Shared.Interaction;
+using Robust.Shared.GameObjects;
+using Robust.Shared.IoC;
+
+namespace Content.Server.Power.EntitySystems;
+
+public class CableSystem : EntitySystem
+{
+    [Dependency] private readonly ToolSystem _toolSystem = default!;
+    [Dependency] private readonly ElectrocutionSystem _electrocutionSystem = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<CableComponent, InteractUsingEvent>(OnInteractUsing);
+        SubscribeLocalEvent<CableComponent, CuttingFinishedEvent>(OnCableCut);
+        SubscribeLocalEvent<CableComponent, AnchorStateChangedEvent>(OnAnchorChanged);
+    }
+
+    private void OnInteractUsing(EntityUid uid, CableComponent cable, InteractUsingEvent args)
+    {
+        if (args.Handled)
+            return;
+
+        var ev = new CuttingFinishedEvent(uid, args.User);
+        _toolSystem.UseTool(args.Used, args.User, uid, 0, cable.CuttingDelay, new[] { cable.CuttingQuality }, doAfterCompleteEvent: ev);
+        args.Handled = true;
+    }
+
+    private void OnCableCut(EntityUid uid, CableComponent cable, CuttingFinishedEvent args)
+    {
+        if (_electrocutionSystem.TryDoElectrifiedAct(uid, args.User))
+            return;
+
+        Spawn(cable.CableDroppedOnCutPrototype, Transform(uid).Coordinates);
+        Del(uid);
+    }
+
+    private void OnAnchorChanged(EntityUid uid, CableComponent cable, ref AnchorStateChangedEvent args)
+    {
+        if (args.Anchored)
+            return; // huh? it wasn't anchored?
+
+        // This entity should not be un-anchorable. But this can happen if the grid-tile is deleted (RCD, explosion,
+        // etc). In that case: behave as if the cable had been cut.
+        Spawn(cable.CableDroppedOnCutPrototype, Transform(uid).Coordinates);
+        Del(uid);
+    }
+}
+
+// TODO: if #5887 gets merged, just use a directed event instead of broadcast-with-target
+public class CuttingFinishedEvent : EntityEventArgs
+{
+    public EntityUid Target;
+    public EntityUid User;
+
+    public CuttingFinishedEvent(EntityUid target, EntityUid user)
+    {
+        Target = target;
+        User = user;
+    }
+}