Add EntityEffectOnTrigger and RejuvenateOnTrigger (#40967)

commit

Content.Shared/Trigger/Systems/EntityEffectOnTriggerSystem.cs

@@ -0,0 +1,30 @@
+using Content.Shared.EntityEffects;
+using Content.Shared.Trigger.Components.Effects;
+
+namespace Content.Shared.Trigger.Systems;
+
+public sealed class EntityEffectOnTriggerSystem : EntitySystem
+{
+    [Dependency] private readonly SharedEntityEffectsSystem _effects = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<EntityEffectOnTriggerComponent, TriggerEvent>(OnTrigger);
+    }
+
+    private void OnTrigger(Entity<EntityEffectOnTriggerComponent> 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;
+
+        _effects.ApplyEffects(target.Value, ent.Comp.Effects, ent.Comp.Scale);
+        args.Handled = true;
+    }
+}