Pathfinder rework (#11452)

Content.Server/NPC/Pathfinding/GridPathfindingComponent.cs

@@ -1,8 +1,24 @@
 namespace Content.Server.NPC.Pathfinding;
 
-[RegisterComponent]
-[Access(typeof(PathfindingSystem))]
+/// <summary>
+/// Stores the relevant pathfinding data for grids.
+/// </summary>
+[RegisterComponent, Access(typeof(PathfindingSystem))]
 public sealed class GridPathfindingComponent : Component
 {
-    public readonly Dictionary<Vector2i, PathfindingChunk> Graph = new();
+    public readonly HashSet<Vector2i> DirtyChunks = new();
+
+    /// <summary>
+    /// Next time the graph is allowed to update.
+    /// </summary>
+    public TimeSpan NextUpdate;
+
+    public readonly Dictionary<Vector2i, GridPathfindingChunk> Chunks = new();
+
+    /// <summary>
+    /// Retrieves the chunk where the specified portal is stored on this grid.
+    /// </summary>
+    public readonly Dictionary<PathPortal, Vector2i> PortalLookup = new();
+
+    public readonly List<PathPortal> DirtyPortals = new();
 }