Make the station start with random broken wiring (#26695)

Random wire cutting on round start

Content.Server/GameTicking/Rules/VariationPass/CutWireVariationPassSystem.cs

@@ -0,0 +1,39 @@
+using Content.Server.GameTicking.Rules.VariationPass.Components;
+using Content.Server.Wires;
+using Robust.Shared.Random;
+
+namespace Content.Server.GameTicking.Rules.VariationPass;
+
+/// <summary>
+/// Handles cutting a random wire on random devices around the station.
+/// This system identifies target devices and adds <see cref="CutWireOnMapInitComponent"/> to them.
+/// The actual wire cutting is handled by <see cref="CutWireOnMapInitSystem"/>.
+/// </summary>
+public sealed class CutWireVariationPassSystem : VariationPassSystem<CutWireVariationPassComponent>
+{
+    protected override void ApplyVariation(Entity<CutWireVariationPassComponent> ent, ref StationVariationPassEvent args)
+    {
+        var wiresCut = 0;
+        var query = AllEntityQuery<WiresComponent, TransformComponent>();
+        while (query.MoveNext(out var uid, out _, out var transform))
+        {
+            // Ignore if not part of the station
+            if (!IsMemberOfStation((uid, transform), ref args))
+                continue;
+
+            // Check against blacklist
+            if (ent.Comp.Blacklist.IsValid(uid))
+                continue;
+
+            if (Random.Prob(ent.Comp.WireCutChance))
+            {
+                EnsureComp<CutWireOnMapInitComponent>(uid);
+                wiresCut++;
+
+                // Limit max wires cut
+                if (wiresCut >= ent.Comp.MaxWiresCut)
+                    break;
+            }
+        }
+    }
+}