add shel

src/HSchool.People/SchoolDemand.cs

@@ -33,7 +33,7 @@ public sealed class SchoolDemand
 
         foreach (var room in map.Rooms)
         {
-            var slots = PupilSlotsOf(catalog, room);
+            var slots = RoomOccupancy.PupilSlots(catalog, room);
             if (catalog.Rooms.TryGetValue(room.Def, out var def))
             {
                 foreach (var position in def.Positions)
@@ -67,19 +67,4 @@ public sealed class SchoolDemand
 
         return new SchoolDemand(classes, seats, staff);
     }
-
-    private static int PupilSlotsOf(DefCatalog catalog, RoomNode room)
-    {
-        var pupilSlots = 0L;
-        foreach (var fill in room.Slots)
-        {
-            var count = fill.Count < 1 ? 1 : Math.Min(fill.Count, byte.MaxValue);
-            if (catalog.Things.TryGetValue(fill.Thing, out var thing) && thing.PupilSlots > 0)
-            {
-                pupilSlots += (long)thing.PupilSlots * count;
-            }
-        }
-
-        return (int)Math.Clamp(pupilSlots, 0, ushort.MaxValue);
-    }
 }