ECS OnUseTimerTrigger (#6369)

Content.Server/Explosion/EntitySystems/TriggerSystem.OnUse.cs

@@ -0,0 +1,32 @@
+using System;
+using Content.Server.Explosion.Components;
+using Content.Shared.Interaction;
+using Content.Shared.Trigger;
+using Robust.Shared.GameObjects;
+
+namespace Content.Server.Explosion.EntitySystems;
+
+public sealed partial class TriggerSystem
+{
+    private void InitializeOnUse()
+    {
+        SubscribeLocalEvent<OnUseTimerTriggerComponent, UseInHandEvent>(OnTimerUse);
+    }
+
+    private void OnTimerUse(EntityUid uid, OnUseTimerTriggerComponent component, UseInHandEvent args)
+    {
+        if (args.Handled) return;
+
+        Trigger(uid, args.User, component);
+        args.Handled = true;
+    }
+
+    // TODO: Need to split this out so it's a generic "OnUseTimerTrigger" component.
+    private void Trigger(EntityUid uid, EntityUid user, OnUseTimerTriggerComponent component)
+    {
+        if (TryComp<AppearanceComponent>(uid, out var appearance))
+            appearance.SetData(TriggerVisuals.VisualState, TriggerVisualState.Primed);
+
+        HandleTimerTrigger(TimeSpan.FromSeconds(component.Delay), uid, user);
+    }
+}