I have added the code to support the Google Assistant alphav2 API

.gitignore

@@ -254,3 +254,5 @@ paket-files/
 /Secrets/client_id.json
 /libmp3lame.32.dll
 /libmp3lame.64.dll
+
+/Tools/

CopySettingsToUserFolder.ps1

@@ -0,0 +1,2 @@
+Copy-Item "GAssistant\Secrets\client_id.json" -Destination $env:APPDATA\GAssistant\
+Copy-Item "GAssistant\settings.json" -Destination $env:APPDATA\GAssistant\

DownloadTools.ps1

@@ -0,0 +1,13 @@
+New-Item Tools -type directory -Force
+
+Invoke-WebRequest -Uri https://www.nuget.org/api/v2/package/Grpc.Tools/ -OutFile grpc.zip
+
+Remove-Item Tools\Grpc\* -recurse
+Expand-Archive grpc.zip -DestinationPath Tools\Grpc
+Remove-Item grpc.zip
+
+Invoke-WebRequest -Uri https://github.com/google/protobuf/releases/download/v3.5.0/protoc-3.5.0-win32.zip -OutFile protoc.zip
+
+Remove-Item Tools\Protoc\* -recurse
+Expand-Archive protoc.zip -DestinationPath Tools\Protoc
+Remove-Item protoc.zip

GAssistant.Store/GAssistant.Store.wapproj

@@ -0,0 +1,62 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '' or '$(VisualStudioVersion)' &lt; '15.0'">
+    <VisualStudioVersion>15.0</VisualStudioVersion>
+  </PropertyGroup>
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|x86">
+      <Configuration>Debug</Configuration>
+      <Platform>x86</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x86">
+      <Configuration>Release</Configuration>
+      <Platform>x86</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|AnyCPU">
+      <Configuration>Debug</Configuration>
+      <Platform>AnyCPU</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|AnyCPU">
+      <Configuration>Release</Configuration>
+      <Platform>AnyCPU</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup>
+    <WapProjPath Condition="'$(WapProjPath)'==''">$(MSBuildExtensionsPath)\Microsoft\DesktopBridge\</WapProjPath>
+  </PropertyGroup>
+  <Import Project="$(WapProjPath)\Microsoft.DesktopBridge.props" />
+  <PropertyGroup>
+    <ProjectGuid>fa7bbace-16a0-4c8c-a5e6-f3f149add7bf</ProjectGuid>
+    <TargetPlatformVersion>10.0.17763.0</TargetPlatformVersion>
+    <TargetPlatformMinVersion>10.0.17134.0</TargetPlatformMinVersion>
+    <DefaultLanguage>en-US</DefaultLanguage>
+    <PackageCertificateKeyFile>GAssistant.Store_TemporaryKey.pfx</PackageCertificateKeyFile>
+    <EntryPointProjectUniqueName>..\GAssistant\GoogleAssistantWindows.csproj</EntryPointProjectUniqueName>
+  </PropertyGroup>
+  <ItemGroup>
+    <AppxManifest Include="Package.appxmanifest">
+      <SubType>Designer</SubType>
+    </AppxManifest>
+    <None Include="GAssistant.Store_TemporaryKey.pfx" />
+  </ItemGroup>
+  <ItemGroup>
+    <Content Include="Images\LockScreenLogo.scale-200.png" />
+    <Content Include="Images\Square150x150Logo.scale-200.png" />
+    <Content Include="Images\Square44x44Logo.scale-200.png" />
+    <Content Include="Images\Square44x44Logo.targetsize-24_altform-unplated.png" />
+    <Content Include="Images\StoreLogo.png" />
+    <Content Include="Images\Wide310x150Logo.scale-200.png" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\GAssistant\GoogleAssistantWindows.csproj" />
+  </ItemGroup>
+  <Import Project="$(WapProjPath)\Microsoft.DesktopBridge.targets" />
+</Project>

GAssistant.Store/Package.appxmanifest

@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<Package
+  xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10"
+  xmlns:mp="http://schemas.microsoft.com/appx/2014/phone/manifest"
+  xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10"
+  xmlns:rescap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities"
+  IgnorableNamespaces="uap mp rescap">
+
+  <Identity
+    Name="6ecf4456-043f-44b8-80be-934f18a1bf83"
+    Publisher="CN=Pieter"
+    Version="1.0.0.0" />
+
+  <Properties>
+    <DisplayName>GAssistant.Store</DisplayName>
+    <PublisherDisplayName>Pieter</PublisherDisplayName>
+    <Logo>Images\StoreLogo.png</Logo>
+  </Properties>
+
+  <Dependencies>
+    <TargetDeviceFamily Name="Windows.Universal" MinVersion="10.0.0.0" MaxVersionTested="10.0.0.0" />
+    <TargetDeviceFamily Name="Windows.Desktop" MinVersion="10.0.14393.0" MaxVersionTested="10.0.14393.0" />
+  </Dependencies>
+
+  <Resources>
+    <Resource Language="x-generate"/>
+  </Resources>
+
+  <Applications>
+    <Application Id="App"
+      Executable="$targetnametoken$.exe"
+      EntryPoint="$targetentrypoint$">
+      <uap:VisualElements
+        DisplayName="GAssistant.Store"
+        Description="GAssistant.Store"
+        BackgroundColor="transparent"
+        Square150x150Logo="Images\Square150x150Logo.png"
+        Square44x44Logo="Images\Square44x44Logo.png">
+        <uap:DefaultTile
+          Wide310x150Logo="Images\Wide310x150Logo.png" />
+      </uap:VisualElements>
+    </Application>
+  </Applications>
+
+  <Capabilities>
+    <Capability Name="internetClient" />
+    <rescap:Capability Name="runFullTrust" />
+  </Capabilities>
+</Package>

App.config → GAssistant/App.config

@@ -1,21 +1,21 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <configuration>
     <startup> 
-        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.2"/>
     </startup>
   <runtime>
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
       <dependentAssembly>
-        <assemblyIdentity name="Google.Apis.Auth" publicKeyToken="4b01fa6e34db77ab" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-1.25.0.0" newVersion="1.25.0.0" />
+        <assemblyIdentity name="Google.Apis.Auth" publicKeyToken="4b01fa6e34db77ab" culture="neutral"/>
+        <bindingRedirect oldVersion="0.0.0.0-1.25.0.0" newVersion="1.25.0.0"/>
       </dependentAssembly>
       <dependentAssembly>
-        <assemblyIdentity name="Google.Apis.Auth.PlatformServices" publicKeyToken="4b01fa6e34db77ab" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-1.25.0.0" newVersion="1.25.0.0" />
+        <assemblyIdentity name="Google.Apis.Auth.PlatformServices" publicKeyToken="4b01fa6e34db77ab" culture="neutral"/>
+        <bindingRedirect oldVersion="0.0.0.0-1.25.0.0" newVersion="1.25.0.0"/>
       </dependentAssembly>
       <dependentAssembly>
-        <assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-10.0.0.0" newVersion="10.0.0.0" />
+        <assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" culture="neutral"/>
+        <bindingRedirect oldVersion="0.0.0.0-10.0.0.0" newVersion="10.0.0.0"/>
       </dependentAssembly>
     </assemblyBinding>
   </runtime>

App.xaml → GAssistant/App.xaml

@@ -1,8 +1,7 @@
 <Application x:Class="GoogleAssistantWindows.App"
              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-             xmlns:local="clr-namespace:GoogleAssistantWindows"
-             StartupUri="MainWindow.xaml">
+             xmlns:local="clr-namespace:GoogleAssistantWindows">
     <Application.Resources>
 
     </Application.Resources>

GAssistant/App.xaml.cs

@@ -0,0 +1,73 @@
+using Autofac;
+using System;
+using System.Collections.Generic;
+using System.Configuration;
+using System.Data;
+using System.Diagnostics;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Threading;
+
+namespace GoogleAssistantWindows
+{
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application
+    {
+        private static NLog.Logger logger = NLog.LogManager.GetCurrentClassLogger();
+
+        public static IContainer Container { get; private set; }
+
+        protected override void OnStartup(StartupEventArgs e)
+        {
+            Application.Current.DispatcherUnhandledException += OnUnhandledException;
+
+            var builder = new ContainerBuilder();
+            builder.RegisterType<MainWindow>();
+            builder.RegisterType<SettingsWindow>();
+            builder.RegisterType<WelcomeWindow>();
+
+            builder.RegisterType<Assistant>()
+                .SingleInstance();
+            builder.RegisterType<UserManager>()
+                .SingleInstance();
+            builder.RegisterType<DeviceRegistration>();
+
+            builder.RegisterType<Settings>()
+                .OnActivating(settings =>
+                    {
+                        settings.Instance.Load();
+                    })
+                .SingleInstance();
+
+            Container = builder.Build();
+
+            MainWindow mainWindow = Container.Resolve<MainWindow>();
+            mainWindow.Show();
+        }
+
+        void OnUnhandledException(object sender, DispatcherUnhandledExceptionEventArgs e)
+        {
+            string typeName = GetTypeName(e.Exception);
+            if(typeName != null)
+                logger.Error("Unhandled Exception at \"{0}\": {1}", typeName, e.Exception.Message);
+            else
+                logger.Error("Unhandled Exception: {0}", e.Exception.Message);
+        }
+
+        private string GetTypeName(Exception ex)
+        {
+            try
+            {
+                StackTrace stackTrace = new StackTrace(ex);
+                return stackTrace.GetFrame(0).GetMethod().DeclaringType.FullName;
+            }
+            catch
+            {
+                return null;
+            }
+        }
+    }
+}