RhSolutions-AddIn/RhSolutions.AddIn/Models/WorksheetExtensions.cs

using RhSolutions.AddIn;

namespace RhSolutions.Services;

public static class WorksheetExtensions
{
    public static bool IsRehauSource(this Worksheet worksheet)
    {
        Range amountCell;
        Range skuCell;
        Range groupCell;
        Range nameCell;

        var pricelistParameters = RhSolutionsAddIn.Configuration.GetPriceListParameters();  

        Range[] cells = new[]
        {
            amountCell = worksheet.Cells.Find(pricelistParameters["Amount"]),
            skuCell = worksheet.Cells.Find(pricelistParameters["Sku"]),
            groupCell = worksheet.Cells.Find(pricelistParameters["Group"]),
            nameCell = worksheet.Cells.Find(pricelistParameters["Name"])
        };

        return cells.All(x => x != null);
    }

    public static void AddValue(this Range range, double value)
    {
        if (range.Value2 == null)
        {
            range.Value2 = value;
        }

        else
        {
            range.Value2 += value;
        }
    }
}