Ice anomaly (#15925)

Co-authored-by: Nemanja <98561806+EmoGarbage404@users.noreply.github.com>

Content.Server/Anomaly/Effects/TempAffectingAnomalySystem.cs

@@ -0,0 +1,39 @@
+using Content.Server.Atmos.EntitySystems;
+using Content.Server.Anomaly.Components;
+using Content.Shared.Anomaly.Components;
+using Robust.Server.GameObjects;
+
+namespace Content.Server.Anomaly.Effects;
+
+/// <summary>
+/// This handles <see cref="TempAffectingAnomalyComponent"/>
+/// </summary>
+public sealed class TempAffectingAnomalySystem : EntitySystem
+{
+    [Dependency] private readonly AtmosphereSystem _atmosphere = default!;
+    [Dependency] private readonly TransformSystem _xform = default!;
+
+    public override void Update(float frameTime)
+    {
+        base.Update(frameTime);
+
+        var query = EntityQueryEnumerator<TempAffectingAnomalyComponent, AnomalyComponent, TransformComponent>();
+        while (query.MoveNext(out var ent, out var comp, out var anom, out var xform))
+        {
+            var grid = xform.GridUid;
+            var map = xform.MapUid;
+            var indices = _xform.GetGridOrMapTilePosition(ent, xform);
+            var mixture = _atmosphere.GetTileMixture(grid, map, indices, true);
+
+            if (mixture is { })
+            {
+                mixture.Temperature += comp.TempChangePerSecond * anom.Severity * frameTime;
+            }
+
+            if (grid != null && anom.Severity > comp.AnomalyHotSpotThreshold)
+            {
+                _atmosphere.HotspotExpose(grid.Value, indices, comp.HotspotExposeTemperature, comp.HotspotExposeVolume, ent, true);
+            }
+        }
+    }
+}