Import multiple chip virgens tables

Controllers/LinesController.cs

@@ -1346,24 +1346,31 @@ namespace line_gestao_api.Controllers
 
             if (ws == null) return;
 
-            var headerRow = ws.RowsUsed().FirstOrDefault(r => r.CellsUsed().Any(c => NormalizeHeader(c.GetString()) == "ITEM"));
+            var headers = ws.RowsUsed()
-            if (headerRow == null) return;
+                .Where(IsChipsVirgensHeader)
-
+                .OrderBy(r => r.RowNumber())
-            var map = BuildHeaderMap(headerRow);
+                .ToList();
-            int colItem = GetCol(map, "ITEM");
+            if (headers.Count == 0) return;
-            if (colItem == 0) return;
-
-            var startRow = headerRow.RowNumber() + 1;
-            var lastRow = ws.LastRowUsed()?.RowNumber() ?? startRow;
 
             await _db.ChipVirgemLines.ExecuteDeleteAsync();
 
             var buffer = new List<ChipVirgemLine>(500);
+            var lastRow = ws.LastRowUsed()?.RowNumber() ?? 1;
 
-            for (int r = startRow; r <= lastRow; r++)
+            for (int i = 0; i < headers.Count; i++)
+            {
+                var headerRow = headers[i];
+                var map = BuildHeaderMap(headerRow);
+                int colItem = GetCol(map, "ITEM");
+                if (colItem == 0) continue;
+
+                var startRow = headerRow.RowNumber() + 1;
+                var endRow = i + 1 < headers.Count ? headers[i + 1].RowNumber() - 1 : lastRow;
+
+                for (int r = startRow; r <= endRow; r++)
                 {
                     var itemStr = GetCellString(ws, r, colItem);
-                if (string.IsNullOrWhiteSpace(itemStr)) break;
+                    if (string.IsNullOrWhiteSpace(itemStr)) continue;
 
                     var numeroChip = NullIfEmptyDigits(GetCellByHeaderAny(ws, r, map,
                         "Nº DO CHIP", "N° DO CHIP", "NUMERO DO CHIP", "N DO CHIP", "NUM. DO CHIP"));
@@ -1390,6 +1397,7 @@ namespace line_gestao_api.Controllers
                         buffer.Clear();
                     }
                 }
+            }
 
             if (buffer.Count > 0)
             {
@@ -1590,6 +1598,24 @@ namespace line_gestao_api.Controllers
             return false;
         }
 
+        private static bool IsChipsVirgensHeader(IXLRow row)
+        {
+            var hasItem = false;
+            var hasNumeroChip = false;
+
+            foreach (var cell in row.CellsUsed())
+            {
+                var k = NormalizeHeader(cell.GetString());
+                if (k == "ITEM") hasItem = true;
+                if (k == "NODOCHIP" || k == "NUMERODOCHIP" || k == "NDOCHIP" || k == "NUMDOCHIP")
+                {
+                    hasNumeroChip = true;
+                }
+            }
+
+            return hasItem && hasNumeroChip;
+        }
+
         // ==========================================================
         // HELPERS (SEUS)
         // ==========================================================