Made buildings unable to overlap

Assets/Scripts/Game/Buildings/BuildingManager.cs

@@ -23,6 +23,7 @@ namespace Fruitomation.Game
 
         public bool AddBuildingAt(Vector2Int position, GameObject prefab, bool updateCellMap = false)
         {
+            //
             GameObject go = Instantiate(prefab, transform);
             BuildingInfo info = new
             (
@@ -33,11 +34,33 @@ namespace Fruitomation.Game
             Vector2Int p0 = position * 40;
             Vector2Int p1 = p0 + new Vector2Int(20, 100);
             
+            Vector2Int g0 = position + new Vector2Int(48, 24);
+            
             Vector2 off0 = info.Building.SizeOnGrid - Vector2.one;
             Vector2 off1 = off0 * 20;
 
             info.Rect.sizeDelta = info.Building.SizeOnGrid * 40;
             info.Rect.anchoredPosition = p1 + off1;
+            
+            Debug.Log(g0);
+            
+            //
+            for (int x = g0.x; x < g0.x + info.Building.SizeOnGrid.x; x++)
+            for (int y = g0.y; y < g0.y + info.Building.SizeOnGrid.y; y++)
+            {
+                if (InhabitedCells[x, y])
+                {
+                    DestroyImmediate(go);
+                    return false;
+                }
+            }
+            
+            //
+            for (int x = g0.x; x < g0.x + info.Building.SizeOnGrid.x; x++)
+            for (int y = g0.y; y < g0.y + info.Building.SizeOnGrid.y; y++)
+            {
+                InhabitedCells[x, y] = true;
+            }
 
             Buildings.Add(info);
             return true;