Add heat conduction (#1653)

Content.Shared/Maps/TurfHelpers.cs

@@ -12,6 +12,34 @@ namespace Content.Shared.Maps
 {
     public static class TurfHelpers
     {
+        /// <summary>
+        ///     Returns the content tile definition for a tile.
+        /// </summary>
+        public static ContentTileDefinition GetContentTileDefinition(this Tile tile)
+        {
+            var tileDefinitionManager = IoCManager.Resolve<ITileDefinitionManager>();
+            return (ContentTileDefinition)tileDefinitionManager[tile.TypeId];
+        }
+
+        /// <summary>
+        ///     Attempts to get the turf at map indices with grid id or null if no such turf is found.
+        /// </summary>
+        public static TileRef? GetTileRef(this MapIndices mapIndices, GridId gridId)
+        {
+            if (!gridId.IsValid())
+                return null;
+
+            var mapManager = IoCManager.Resolve<IMapManager>();
+
+            if (!mapManager.TryGetGrid(gridId, out var grid))
+                return null;
+
+            if (!grid.TryGetTileRef(mapIndices, out var tile))
+                return null;
+
+            return tile;
+        }
+
         /// <summary>
         ///     Attempts to get the turf at a certain coordinates or null if no such turf is found.
         /// </summary>