using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;

namespace Sinvo.EplanHpD.Plugin.DynaClient
{
    public class XMLMethod
    {
        /// <summary>
        /// XML的SelectSingleNode的替代方法
        /// </summary>
        /// <param name="xmlDoc"></param>
        /// <param name="nodeFullName"></param>
        /// <returns></returns>
        public static XmlNode GetXmlNode(XmlDocument xmlDoc, string nodeFullName)
        {

            if (xmlDoc.ChildNodes.Count > 0)
            {
                int index = nodeFullName.IndexOf("/");
                string nodeName = null;
                if (index > -1)
                {
                    nodeName = nodeFullName.Substring(0, index);
                }
                else
                {
                    nodeName = nodeFullName;
                }
                foreach (XmlNode tempNode in xmlDoc.ChildNodes)
                {
                    if (string.Compare(tempNode.Name, nodeName, true) == 0)
                    {
                        if (index > -1)
                        {
                            int fullNameLength = nodeFullName.Length - index - 1;
                            if (fullNameLength < 1)
                            {
                                return tempNode;
                            }
                            else
                            {
                                string childNodeFullName = nodeFullName.Substring(index + 1, fullNameLength);
                                return GetChildNode(tempNode, childNodeFullName);
                            }
                        }
                        else
                        {
                            return tempNode;
                        }
                    }
                }
            }
            return null;
        }
        private static XmlNode GetChildNode(XmlNode node, string nodeFullName)
        {
            int index = nodeFullName.IndexOf("/");
            string nodeName = null;
            if (index > -1)
            {
                nodeName = nodeFullName.Substring(0, index);
            }
            else
            {
                nodeName = nodeFullName;
            }
            foreach (XmlNode tempNode in node.ChildNodes)
            {
                if (string.Compare(tempNode.Name, nodeName, true) == 0)
                {
                    if (index > -1)
                    {
                        int fullNameLength = nodeFullName.Length - index - 1;
                        if (fullNameLength < 1)
                        {
                            return tempNode;
                        }
                        else
                        {
                            string childNodeFullName = nodeFullName.Substring(index + 1, fullNameLength);
                            return GetChildNode(tempNode, childNodeFullName);
                        }
                    }
                    else
                    {
                        return tempNode;
                    }
                }
            }
            return null;
        }
    }
}