Synnefo » Pithos MS Client

// -----------------------------------------------------------------------

// <copyright file="FeedbackViewModel.cs" company="Microsoft">

// TODO: Update copyright text.

// </copyright>

// -----------------------------------------------------------------------

using System.ComponentModel.Composition;

using System.Diagnostics;

using System.Diagnostics.Contracts;

using System.IO;

using System.Net;

using System.Reflection;

using System.Windows;

using Caliburn.Micro;

using Pithos.Client.WPF.Properties;

namespace Pithos.Client.WPF.Shell

{

    using System;

    using System.Collections.Generic;

    using System.Linq;

    using System.Text;

    /// <summary>

    /// TODO: Update summary.

    /// </summary>

    [Export(typeof(FeedbackViewModel))]

    public class FeedbackViewModel:Screen

    {        

        public string Message { get; set; }

        public string Data { get; set; }

        private IWindowManager _windowManager;

        private static readonly log4net.ILog Log = log4net.LogManager.GetLogger("Pithos");

        [ImportingConstructor]

        public FeedbackViewModel(IWindowManager windowManager)

        {

            _windowManager = windowManager;

            Data = GetBasicData() ;

        }

        public void AppendData(string data)

        {

            Data = Data + "\r\n" + data;

        }

        private string GetBasicData()

        {

            Assembly assembly = Assembly.GetExecutingAssembly();

            var attributes = assembly.GetCustomAttributes(false);

            var versionAtt = attributes.OfType<AssemblyInformationalVersionAttribute>().First();

            var fileVersion = FileVersionInfo.GetVersionInfo(assembly.Location);

            var released = DateTime.Parse(versionAtt.InformationalVersion);

            var builder = new StringBuilder();

            builder.AppendLine("Pithos Windows Client")

                .Append('-', 30)

                .AppendLine()

                .AppendFormat("Released: {0}\r\n", released)

                .AppendFormat("File Version: {0}\r\n", fileVersion.FileVersion)

                .AppendFormat("Assembly Version: {0}\r\n", assembly.GetName().Version)

                .AppendFormat("OS: {0} 64Bit: {1}\r\n",Environment.OSVersion,Environment.Is64BitOperatingSystem)

                .AppendFormat("Wokring Set: {0} bytes\r\n", Environment.WorkingSet)

                .AppendFormat("Processors: {0} \r\n", Environment.ProcessorCount)                

                .Append('=', 30)

                .AppendLine();

            var basicData = builder.ToString();

            return basicData;

        }

        public void Send()

        {

            var message = "Pithos Windows Client Feedback:\r\n" +Message;

            var fields = new Dictionary<string, string> { { "feedback-msg", message }, { "feedback-data", Data } };

            var token = Settings.Default.Accounts.First(account => account.UsePithos).ApiKey;

            try

            {

                PostForm(Settings.Default.FeedbackUri, token,fields);

            }

            catch (Exception exc)

            {

                Log.Error("Failed to submit feedback",exc);

                MessageBox.Show("There was an error while submitting your feedback. The error was logged", "Failed to submit feedback",

                                MessageBoxButton.OK, MessageBoxImage.Error);

            }

            TryClose();

        }

        private async void PostForm(string formUrl, string token,Dictionary<string, string> fields)

        {

            if (String.IsNullOrWhiteSpace(formUrl))

                throw new ArgumentNullException("formUrl");

            if (String.IsNullOrWhiteSpace(token))

                throw new ArgumentNullException("token");

            if (fields == null)

                throw new ArgumentNullException("fields");

            Contract.EndContractBlock();

            var request = WebRequest.Create(formUrl);

            request.Method = "POST";

            request.Headers.Add("X-Auth-Token",token);

            var builder = new StringBuilder();

            foreach (var field in fields)

            {

                builder.AppendFormat("{0}={1}&", field.Key, Uri.EscapeDataString(field.Value));

            }

            var postData = builder.ToString().TrimEnd('&');

            var byteArray = Encoding.UTF8.GetBytes(postData);

            request.ContentType = "application/x-www-form-urlencoded";

            request.ContentLength = byteArray.Length;

            using (var stream = request.GetRequestStream())

            {

                stream.Write(byteArray, 0, byteArray.Length);

            }

            // Get the response.

            var response = await request.GetResponseAsync();

            var webResponse = ((HttpWebResponse)response);

            var result=webResponse.StatusCode;

            if (result != HttpStatusCode.OK)

            {

                // Get the stream containing content returned by the server.

                using (var responseStream = webResponse.GetResponseStream())

                using (var reader = new StreamReader(responseStream))

                {

                    var responseFromServer = reader.ReadToEnd();

                    Log.WarnFormat("Unexpected status returned from feedback form: {0} - {1}\r\n{2}",result,webResponse.StatusDescription, responseFromServer);                    

                }

            }

            response.Close();

        }

    }

}