Trigger Refactor (#39034)

Content.Shared/Trigger/Systems/FlashOnTriggerSystem.cs

@@ -0,0 +1,30 @@
+using Content.Shared.Flash;
+using Content.Shared.Trigger.Components.Effects;
+
+namespace Content.Shared.Trigger.Systems;
+
+public sealed class FlashOnTriggerSystem : EntitySystem
+{
+    [Dependency] private readonly SharedFlashSystem _flash = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<FlashOnTriggerComponent, TriggerEvent>(OnTrigger);
+    }
+
+    private void OnTrigger(Entity<FlashOnTriggerComponent> ent, ref TriggerEvent args)
+    {
+        if (args.Key != null && !ent.Comp.KeysIn.Contains(args.Key))
+            return;
+
+        var target = ent.Comp.TargetUser ? args.User : ent.Owner;
+
+        if (target == null)
+            return;
+
+        _flash.FlashArea(target.Value, args.User, ent.Comp.Range, ent.Comp.Duration, probability: ent.Comp.Probability);
+        args.Handled = true;
+    }
+}