[longomatch] Add Updates Notifier service.

[Andoni Morales Alastruey <amorales src gnome org>]

commit e561a64a2b20cf4d4d0d2ca4a940c9cf719673c4
Author: Xavi Artigas <xartigas fluendo com>
Date:   Fri Apr 10 10:39:25 2015 +0200

    Add Updates Notifier service.
    
    The link in the popup message does not work yet.
    Requires machine.config file to be available, which means that MONO_CFG_PATH has to be set on some OS.

 LongoMatch.Services/LongoMatch.Services.csproj |    6 +-
 LongoMatch.Services/UpdatesNotifier.cs         |   94 ++++++++++++++++++++++++
 po/POTFILES.in                                 |    1 +
 3 files changed, 100 insertions(+), 1 deletions(-)
---
diff --git a/LongoMatch.Services/LongoMatch.Services.csproj b/LongoMatch.Services/LongoMatch.Services.csproj
index 6eacc73..54f064a 100644
--- a/LongoMatch.Services/LongoMatch.Services.csproj
+++ b/LongoMatch.Services/LongoMatch.Services.csproj
@@ -44,6 +44,7 @@
     <Compile Include="..\AssemblyInfo\AssemblyInfo.cs">
       <Link>AssemblyInfo.cs</Link>
     </Compile>
+    <Compile Include="UpdatesNotifier.cs" />
   </ItemGroup>
   <ItemGroup>
     <Folder Include="..\" />
@@ -52,6 +53,9 @@
     <Reference Include="System" />
     <Reference Include="Mono.Posix" />
     <Reference Include="System.Core" />
+    <Reference Include="Newtonsoft.Json, Version=4.5.0.0, Culture=neutral, PublicKeyToken=b9a188c8922137c6">
+      <Package>newtonsoft-json</Package>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\LongoMatch.Core\LongoMatch.Core.csproj">
@@ -68,4 +72,4 @@
     </ProjectReference>
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
-</Project>
\ No newline at end of file
+</Project>
diff --git a/LongoMatch.Services/UpdatesNotifier.cs b/LongoMatch.Services/UpdatesNotifier.cs
new file mode 100644
index 0000000..165c9f2
--- /dev/null
+++ b/LongoMatch.Services/UpdatesNotifier.cs
@@ -0,0 +1,94 @@
+//
+//  Copyright (C) 2015 FLUENDO S.A.
+//
+
+using System;
+using System.IO;
+using System.Reflection;
+using System.Net;
+using System.Threading;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+using Mono.Unix;
+
+namespace LongoMatch.Services
+{
+
+
+       public class UpdatesNotifier
+       {
+               readonly Version actual;
+               Version update;
+
+               const string UPDATE_INFO_URL="http://oneplay-cdn.fluendo.com/latest.json";;
+               string temp_file;
+               string downloadURL;
+
+               #region Constructors
+               public UpdatesNotifier()
+               {
+                       actual = Assembly.GetExecutingAssembly().GetName().Version;
+                       temp_file = Path.Combine(Config.HomeDir, "latest.json");
+
+                       var thread = new Thread(new ThreadStart(CheckForUpdates));
+                       thread.Start();
+               }
+               #endregion
+
+               #region Private methods
+               void FetchNewVersion() {
+                       var wb = new WebClient();
+                       try {
+                               wb.DownloadFile(UPDATE_INFO_URL,temp_file);
+                               var fileStream = new FileStream(temp_file, FileMode.Open);
+                               var sr = new StreamReader (fileStream);
+                               JObject latest = JsonConvert.DeserializeObject<JObject> (sr.ReadToEnd ());
+                               fileStream.Close ();
+
+                               update = new Version (latest["version"].Value<string> ());
+                               downloadURL = latest["url"].Value<string> ();
+                       }
+                       catch(Exception ex) {
+                               Console.WriteLine("Error downloading version file:\n"+ex);
+                               update = actual;
+                       }
+               }
+
+               bool ConectionExists() {
+                       try {
+                               Dns.GetHostEntry("oneplay-cdn.fluendo.com");
+                               return true;
+                       }
+                       catch {
+                               update = actual;
+                               return false;
+                       }
+               }
+
+               bool IsOutDated() {
+                       if(update.Major > actual.Major)
+                               return true;
+                       if(update.Minor > actual.Minor)
+                               return true;
+                       if(update.Build > actual.Build)
+                               return true;
+                       return false;
+               }
+
+               void CheckForUpdates() {
+                       if(ConectionExists())
+                               FetchNewVersion();
+                       if(update != null && IsOutDated()) {
+                               Config.GUIToolkit.Invoke (delegate {
+                                       Config.GUIToolkit.InfoMessage (
+                                               string.Format (
+                                                       Catalog.GetString("Version {0} is available!\n" +
+                                                               "(You are using version {1})\n" +
+                                                               "<a href=\"{2}/index.html\">Click here to get 
it.</a>"),
+                                                       update, actual, downloadURL));
+                               });
+                       }
+               }
+               #endregion
+       }
+}
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 9829c2d..910a12f 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -148,3 +148,4 @@ LongoMatch.Services/ProjectsManager.cs
 LongoMatch.Services/RenderingJobsManager.cs
 LongoMatch.Services/TemplatesService.cs
 LongoMatch.Services/ToolsManager.cs
+LongoMatch.Services/UpdatesNotifier.cs