implemented VersionCheckCommand

Author: retailcoder

RetailCoder.VBE/Rubberduck.csproj

@@ -281,6 +281,7 @@
     <Reference Include="System.Core" />
     <Reference Include="System.Data" />
     <Reference Include="System.Drawing" />
+    <Reference Include="System.Net.Http" />
     <Reference Include="System.Printing" />
     <Reference Include="System.Runtime.Serialization" />
     <Reference Include="System.Windows.Forms" />
@@ -493,6 +494,7 @@
     <Compile Include="UI\CodeExplorer\Commands\AddClassModuleCommand.cs" />
     <Compile Include="UI\CodeExplorer\Commands\AddStdModuleCommand.cs" />
     <Compile Include="UI\CodeExplorer\Commands\AddTestModuleCommand.cs" />
+    <Compile Include="VersionCheck\IVersionCheck.cs" />
     <Compile Include="UI\Command\MenuItems\CommandBars\AppCommandBarBase.cs" />
     <Compile Include="UI\Command\MenuItems\CommandBars\ContextSelectionLabelMenuItem.cs" />
     <Compile Include="UI\Command\MenuItems\CommandBars\IContextFormatter.cs" />
@@ -507,6 +509,7 @@
     <Compile Include="UI\Command\MenuItems\RegexAssistantCommand.cs" />
     <Compile Include="UI\Command\MenuItems\RegexAssistantCommandMenuItem.cs" />
     <Compile Include="UI\Command\MenuItems\ParentMenus\ToolsParentMenu.cs" />
+    <Compile Include="UI\Command\VersionCheckCommand.cs" />
     <Compile Include="UI\Controls\BindableTextEditor.cs" />
     <Compile Include="UI\Controls\LinkButton.xaml.cs">
       <DependentUpon>LinkButton.xaml</DependentUpon>

RetailCoder.VBE/UI/Command/VersionCheckCommand.cs

@@ -0,0 +1,65 @@
+using System;
+using System.Diagnostics;
+using System.Windows.Forms;
+using NLog;
+using Rubberduck.VersionCheck;
+
+namespace Rubberduck.UI.Command
+{
+    public interface IExternalProcess
+    {
+        void Start(string fileName);
+    }
+
+    public class ExternalProcess : IExternalProcess
+    {
+        public void Start(string fileName)
+        {
+            var info = new ProcessStartInfo(fileName)
+            {
+                WindowStyle = ProcessWindowStyle.Maximized
+            };
+            Process.Start(info);
+        }
+    }
+
+    public class VersionCheckCommand : CommandBase
+    {
+        private readonly IVersionCheck _versionCheck;
+        private readonly IMessageBox _prompt;
+        private readonly IExternalProcess _process;
+
+        public VersionCheckCommand(IVersionCheck versionCheck, IMessageBox prompt, IExternalProcess process)
+            : base(LogManager.GetCurrentClassLogger())
+        {
+            _versionCheck = versionCheck;
+            _prompt = prompt;
+            _process = process;
+        }
+
+        protected override void ExecuteImpl(object parameter)
+        {
+            _versionCheck.GetLatestVersionAsync().ContinueWith(Execute);
+        }
+
+        private void Execute(Version latestVersion)
+        {
+            if (_versionCheck.CurrentVersion < latestVersion)
+            {
+                PromptAndBrowse(latestVersion);
+            }
+        }
+
+        private void PromptAndBrowse(Version latestVersion)
+        {
+            var prompt = string.Format(RubberduckUI.VersionCheck_NewVersionAvailable, latestVersion);
+            if (_prompt.Show(prompt, RubberduckUI.Rubberduck, MessageBoxButtons.YesNo, MessageBoxIcon.Information) ==
+                DialogResult.No)
+            {
+                return;
+            }
+
+            _process.Start("https://github.com/rubberduck-vba/Rubberduck/releases/latest");
+        }
+    }
+}

RetailCoder.VBE/UI/RubberduckUI.Designer.cs

@@ -1867,4 +1867,7 @@ End Sub</value>
   <data name="SettingsCaption_ImportSettings" xml:space="preserve">
     <value>Import</value>
   </data>
+  <data name="VersionCheck_NewVersionAvailable" xml:space="preserve">
+    <value>La version {0} de Rubberduck est maintenant disponible! Souhaitez-vous consulter les notes de mise à jour maintenant?</value>
+  </data>
 </root>

RetailCoder.VBE/UI/RubberduckUI.fr.resx

@@ -1914,4 +1914,7 @@ Would you like to import them to Rubberduck?</value>
   <data name="IndenterSettings_CodeSampleHeader" xml:space="preserve">
     <value>Indented Code Sample</value>
   </data>
+  <data name="VersionCheck_NewVersionAvailable" xml:space="preserve">
+    <value>Rubberduck version {0} is now available! Would you like to review the release notes now?</value>
+  </data>
 </root>

RetailCoder.VBE/UI/RubberduckUI.resx

@@ -0,0 +1,39 @@
+using System;
+using System.Net.Http;
+using System.Reflection;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Rubberduck.VersionCheck
+{
+    public interface IVersionCheck
+    {
+        Task<Version> GetLatestVersionAsync(CancellationToken token = default(CancellationToken));
+        Version CurrentVersion { get; }
+    }
+
+    public class VersionCheck : IVersionCheck
+    {
+        private readonly Lazy<Version> _currentVersion;
+        public VersionCheck()
+        {
+            _currentVersion = new Lazy<Version>(() => Assembly.GetExecutingAssembly().GetName().Version);
+        }
+
+        private Version _latestVersion;
+        public async Task<Version> GetLatestVersionAsync(CancellationToken token = default(CancellationToken))
+        {
+            if (_latestVersion != default(Version)) { return _latestVersion; }
+
+            using (var client = new HttpClient())
+            {
+                var url = new Uri("http://rubberduckvba.com/Build/Version/Stable");
+                var response = await client.GetAsync(url, token);
+                var version = await response.Content.ReadAsStringAsync();
+                return _latestVersion = new Version(version);
+            }
+        }
+
+        public Version CurrentVersion { get { return _currentVersion.Value; } }
+    }
+}