IgnitionSourceComponent added (#13555)

Co-authored-by: Jezithyr <6192499+Jezithyr@users.noreply.github.com>
Co-authored-by: Kara <lunarautomaton6@gmail.com>

Content.Server/IgnitionSource/IgnitionSourceSystem.cs

@@ -0,0 +1,53 @@
+using Content.Server.Atmos.EntitySystems;
+using Content.Shared.Temperature;
+using Robust.Server.GameObjects;
+
+namespace Content.Server.IgnitionSource;
+
+/// <summary>
+/// This handles ignition, Jez basically coded this.
+/// </summary>
+///
+public sealed class IgnitionSourceSystem : EntitySystem
+{
+    /// <inheritdoc/>
+    ///
+    [Dependency] private readonly AtmosphereSystem _atmosphereSystem = default!;
+    [Dependency] private readonly TransformSystem _transformSystem = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+        SubscribeLocalEvent<IgnitionSourceComponent,IsHotEvent>(OnIsHot);
+    }
+
+    private void OnIsHot(EntityUid uid, IgnitionSourceComponent component, IsHotEvent args)
+    {
+        Logger.Debug(args.IsHot.ToString());
+        SetIgnited(uid,component,args.IsHot);
+    }
+
+    private void SetIgnited(EntityUid uid, IgnitionSourceComponent component, bool newState)
+    {
+        component.Ignited = newState;
+    }
+
+    public override void Update(float frameTime)
+    {
+        base.Update(frameTime);
+
+        foreach (var (component,transform) in EntityQuery<IgnitionSourceComponent,TransformComponent>())
+        {
+            var source = component.Owner;
+            if (!component.Ignited)
+                continue;
+
+            if (transform.GridUid is { } gridUid)
+            {
+                var position = _transformSystem.GetGridOrMapTilePosition(source, transform);
+                _atmosphereSystem.HotspotExpose(gridUid, position, component.Temperature, 50, true);
+            }
+        }
+
+    }
+}