using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Xml.Serialization;

namespace Ips.Library.Basic
{
    public static class XmlUtil
    {
        public static void ToXmlFile(string fileName, object obj)
        {
            StreamWriter writer = null;
            try
            {
                XmlSerializer serializer = new XmlSerializer(obj.GetType());
                writer = new StreamWriter(fileName, false, Encoding.UTF8);
                serializer.Serialize(writer, obj);
                writer.Close();
            }
            catch
            {
                if (writer != null)
                    writer.Close();
                throw;
            }
        }

        public static string ToXmlString(object obj)
        {
            var xmlSerializer = new XmlSerializer(obj.GetType());

            using (var stringWriter = new StringWriter())
            {
                xmlSerializer.Serialize(stringWriter, obj);
                using (var streamReader = new StringReader(stringWriter.GetStringBuilder().ToString()))
                {
                    return streamReader.ReadToEnd();
                }
            }
        }

        public static object FromXmlFile(string fileName, Type type)
        {
            StreamReader reader = null;
            try
            {
                XmlSerializer serializer = new XmlSerializer(type);
                reader = new StreamReader(fileName);
                object obj = serializer.Deserialize(reader);
                reader.Close();

                return obj;
            }
            catch (Exception)
            {
                if (reader != null)
                    reader.Close();
                return null;
            }
        }

        public static object FromXmlString(string xmlString, Type type)
        {
            var x = new XmlSerializer(type);
            var r = new StringReader(xmlString);

            return x.Deserialize(r);
        }

        public static T FromXmlString<T>(string xmlString)
        {
            var x = new XmlSerializer(typeof(T));
            var r = new StringReader(xmlString);

            return (T)x.Deserialize(r);
        }
    }
}