namespace YLErp.Helpers
{
    static class PathHelper
    {
        /// <summary>
        /// 物理路径转换为web路径
        /// </summary>
        public static string PhysicalPathToWebPath(string physicalPath, string rootPath)
        {
            if (physicalPath is null)
            {
                return string.Empty;
            }

            if (string.IsNullOrEmpty(rootPath))
            {
                return physicalPath.Replace('\\', '/');
            }

            var index = physicalPath.IndexOf("\\app_docs\\", StringComparison.OrdinalIgnoreCase);

            if (index >= 0)
            {
                return physicalPath.Substring(index).Replace('\\', '/');
            }

            if (physicalPath.StartsWith(rootPath, StringComparison.OrdinalIgnoreCase))
            {
                return physicalPath.Substring(rootPath.Length).Replace('\\', '/').Insert(0, "/");
            }

            throw new Exception("物理路径转换WEB路径失败,原因:物理路径应开始于传入的根目录路径");
        }
    }
}