predict IgnitionSourceComponent (#36310)

* PREDICTION

* comment

* don't overwrite event args

* totally not a web edit

* intn't

Content.Shared/IgnitionSource/SharedIgnitionSourceSystem.cs

@@ -0,0 +1,47 @@
+using Content.Shared.Item.ItemToggle.Components;
+using Content.Shared.Temperature;
+
+namespace Content.Shared.IgnitionSource;
+
+/// <summary>
+/// Ignites flammable gases when the ignition source is toggled on.
+/// Also makes the entity hot so that it can be used to ignite matchsticks, cigarettes ect.
+/// </summary>
+public abstract partial class SharedIgnitionSourceSystem : EntitySystem
+{
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<IgnitionSourceComponent, IsHotEvent>(OnIsHot);
+        SubscribeLocalEvent<ItemToggleHotComponent, ItemToggledEvent>(OnItemToggle);
+        SubscribeLocalEvent<IgnitionSourceComponent, IgnitionEvent>(OnIgnitionEvent);
+    }
+
+    private void OnIsHot(Entity<IgnitionSourceComponent> ent, ref IsHotEvent args)
+    {
+        args.IsHot |= ent.Comp.Ignited;
+    }
+
+    private void OnItemToggle(Entity<ItemToggleHotComponent> ent, ref ItemToggledEvent args)
+    {
+        SetIgnited(ent.Owner, args.Activated);
+    }
+
+    private void OnIgnitionEvent(Entity<IgnitionSourceComponent> ent, ref IgnitionEvent args)
+    {
+        SetIgnited((ent.Owner, ent.Comp), args.Ignite);
+    }
+
+    /// <summary>
+    /// Simply sets the ignited field to the ignited param.
+    /// </summary>
+    public void SetIgnited(Entity<IgnitionSourceComponent?> ent, bool ignited = true)
+    {
+        if (!Resolve(ent, ref ent.Comp, false))
+            return;
+
+        ent.Comp.Ignited = ignited;
+        Dirty(ent, ent.Comp);
+    }
+}