Change find amount column algorithm

RhSolutions.AddIn/Services/GuessReader.cs

@@ -1,5 +1,4 @@
-using Microsoft.Office.Interop.Excel;
+using System.IO;
-using System.IO;
 
 namespace RhSolutions.Services;
 
@@ -15,20 +14,14 @@ public class GuessReader : IReader
 
     public Dictionary<Product, double> ReadProducts(Range range)
     {
-        _progressBar = new("Поиск возможных пар артикул-количество...", range.Columns.Count);
         int? productColumnIndex = null;
-        List<int> amountColumnIndeces = new();
 
         for (int column = 1; column < range.Columns.Count + 1; column++)
         {
-            _progressBar.Update();
+            if (IsProductColumn(range.Columns[column]))
-            if (productColumnIndex == null && IsProductColumn(range.Columns[column]))
             {
                 productColumnIndex = column;
-            }
+                break;
-            else if (IsAmountColumn(range.Columns[column]))
-            {
-                amountColumnIndeces.Add(column);
             }
         }
 
@@ -37,35 +30,41 @@ public class GuessReader : IReader
             throw new ArgumentException("Колонка с артикулом не определена");
         }
 
-        if (amountColumnIndeces.Count == 0)
+        int? amountColumnIndex = null;
+        int currentIndex = productColumnIndex.Value + 1;
+
+        while (currentIndex > 0)
+        {
+            if (currentIndex > range.Columns.Count + 1)
+            {
+                currentIndex = productColumnIndex.Value - 1;
+                continue;
+            }
+            if (currentIndex > productColumnIndex)
+            {
+                if (IsAmountColumn(range.Columns[currentIndex++]))
+                {
+                    amountColumnIndex = currentIndex - 1;
+                    break;
+                }
+            }
+            else
+            {
+                if (IsAmountColumn(range.Columns[currentIndex--]))
+                {
+                    amountColumnIndex = currentIndex + 1;
+                    break;
+                }
+            }
+        }
+
+        if (amountColumnIndex == null)
         {
             throw new ArgumentException("Колонка с количеством не определена");
         }
 
-        else if (amountColumnIndeces.Count == 1)
-        {
-            return GetDictionaryFromColumns(range.Columns[productColumnIndex],
-                range.Columns[amountColumnIndeces.First()]);
-        }
-
         else
         {
-            int amountColumnIndex = amountColumnIndeces
-                .Where(i => i > productColumnIndex)
-                .FirstOrDefault();
-
-            if (amountColumnIndex == 0)
-            {
-                amountColumnIndex = amountColumnIndeces 
-                    .Where(i => i < productColumnIndex)
-                    .LastOrDefault();
-            }
-
-            if (amountColumnIndex == 0)
-            {
-                throw new ArgumentException("Колонка с количеством не определена");
-            }
-
             return GetDictionaryFromColumns(range.Columns[productColumnIndex],
                 range.Columns[amountColumnIndex]);
         }