using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Configuration;
using System.IO;
using System.Xml;
using System.Xml.Linq;
using System.Net;
using System.Diagnostics;
using System.Windows;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Management;
using System.Threading;
namespace Housters.Tray.Installer
{
public class VersionHelper
{
private string MSIFilePath = Path.Combine(Environment.CurrentDirectory, "HoustersCrawler.msi");
private string CmdFilePath = Path.Combine(Environment.CurrentDirectory, "Install.cmd");
private string MsiUrl = String.Empty;
public bool CheckForNewVersion()
{
MsiUrl = GetNewVersionUrl();
return MsiUrl.Length > 0;
}
public void DownloadNewVersion()
{
DownloadNewVersion(MsiUrl);
CreateCmdFile();
RunCmdFile();
ExitApplication();
}
private string GetNewVersionUrl()
{
var currentVersion = Convert.ToInt32(ConfigurationManager.AppSettings["Version"]);
//get xml from url.
var url = ConfigurationManager.AppSettings["VersionUrl"].ToString();
var builder = new StringBuilder();
using (var stringWriter = new StringWriter(builder))
{
using (var xmlReader = new XmlTextReader(url))
{
var doc = XDocument.Load(xmlReader);
//get versions.
var versions = from v in doc.Descendants("version")
select new
{
Name = v.Element("name").Value,
Number = Convert.ToInt32(v.Element("number").Value),
URL = v.Element("url").Value,
Date = Convert.ToDateTime(v.Element("date").Value)
};
var version = versions.ToList()[0];
//check if latest version newer than current version.
if (version.Number > currentVersion)
{
return version.URL;
}
}
}
return String.Empty;
}
private void DownloadNewVersion(string url)
{
//delete existing msi.
if (File.Exists(MSIFilePath))
{
File.Delete(MSIFilePath);
}
//download new msi.
using (var client = new WebClient())
{
client.DownloadFile(url, MSIFilePath);
}
}
private void CreateCmdFile()
{
//check if file exists.
if (File.Exists(CmdFilePath))
File.Delete(CmdFilePath);
//create new file.
var fi = new FileInfo(CmdFilePath);
var fileStream = fi.Create();
fileStream.Close();
//write commands to file.
using (TextWriter writer = new StreamWriter(CmdFilePath))
{
writer.WriteLine(@"msiexec /i HoustersCrawler.msi /quiet");
}
}
private void RunCmdFile()
{//run command file to reinstall app.
var p = new Process();
p.StartInfo = new ProcessStartInfo("cmd.exe", "/c Install.cmd");
p.StartInfo.CreateNoWindow = true;
p.Start();
//p.WaitForExit();
}
private void ExitApplication()
{//exit the app.
Application.Current.Shutdown();
}
}
}