using System.Data;

namespace EnvelopeGenerator.ServiceHost.Extensions;

public static class DataRowExtensions
{
    public static T ItemEx<T>(this DataRow row, string columnName, T defaultValue)
    {
        if (!row.Table.Columns.Contains(columnName))
        {
            return defaultValue;
        }

        var value = row[columnName];
        if (value is DBNull or null)
        {
            return defaultValue;
        }

        return (T)Convert.ChangeType(value, typeof(T));
    }

    public static string ItemEx(this DataRow row, string columnName, string defaultValue)
    {
        return row.ItemEx<string>(columnName, defaultValue);
    }
}