Add command line interface and change solution structure (#26)

DiscordChatExporter.Gui/App.ammy

@@ -0,0 +1,69 @@
+Application "DiscordChatExporter.Gui.App" {
+  StartupUri: "Views/MainWindow.g.xaml"
+  Startup: App_Startup
+  Exit: App_Exit
+
+  Resources: ResourceDictionary {
+    // Material Design
+    #MergeDictionary("pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Light.xaml")
+    #MergeDictionary("pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Defaults.xaml")
+
+    // Colors
+    Color Key="PrimaryColor" { "#343838" }
+    Color Key="PrimaryLightColor" { "#5E6262" }
+    Color Key="PrimaryDarkColor" { "#0D1212" }
+    Color Key="AccentColor" { "#F9A825" }
+    Color Key="TextColor" { "#000000" }
+    Color Key="InverseTextColor" { "#FFFFFF" }
+
+    // Brushes
+    SolidColorBrush Key="PrimaryHueLightBrush" { Color: resource dyn "PrimaryLightColor" }
+    SolidColorBrush Key="PrimaryHueLightForegroundBrush" { Color: resource dyn "InverseTextColor" }
+    SolidColorBrush Key="PrimaryHueMidBrush" { Color: resource dyn "PrimaryColor" }
+    SolidColorBrush Key="PrimaryHueMidForegroundBrush" { Color: resource dyn "InverseTextColor" }
+    SolidColorBrush Key="PrimaryHueDarkBrush" { Color: resource dyn "PrimaryDarkColor" }
+    SolidColorBrush Key="PrimaryHueDarkForegroundBrush" { Color: resource dyn "InverseTextColor" }
+    SolidColorBrush Key="SecondaryAccentBrush" { Color: resource dyn "AccentColor" }
+    SolidColorBrush Key="SecondaryAccentForegroundBrush" { Color: resource dyn "TextColor" }
+    SolidColorBrush Key="PrimaryTextBrush" { Color: resource dyn "TextColor", Opacity: 0.87 }
+    SolidColorBrush Key="SecondaryTextBrush" { Color: resource dyn "TextColor", Opacity: 0.64 }
+    SolidColorBrush Key="DimTextBrush" { Color: resource dyn "TextColor", Opacity: 0.45 }
+    SolidColorBrush Key="PrimaryInverseTextBrush" { Color: resource dyn "InverseTextColor", Opacity: 1 }
+    SolidColorBrush Key="SecondaryInverseTextBrush" { Color: resource dyn "InverseTextColor", Opacity: 0.7 }
+    SolidColorBrush Key="DimInverseTextBrush" { Color: resource dyn "InverseTextColor", Opacity: 0.52 }
+    SolidColorBrush Key="AccentTextBrush" { Color: resource dyn "AccentColor", Opacity: 1 }
+    SolidColorBrush Key="DividerBrush" { Color: resource dyn "TextColor", Opacity: 0.12 }
+    SolidColorBrush Key="InverseDividerBrush" { Color: resource dyn "InverseTextColor", Opacity: 0.12 }
+
+    // Styles
+    Style {
+      TargetType: "Image"
+      #Setter("RenderOptions.BitmapScalingMode", "HighQuality")
+    }
+
+    Style {
+      TargetType: "ProgressBar"
+      BasedOn: resource "MaterialDesignLinearProgressBar"
+      #Setter("Foreground", resource dyn "SecondaryAccentBrush")
+      #Setter("Height", 2)
+      #Setter("Minimum", 0)
+      #Setter("Maximum", 1)
+      #Setter("BorderThickness", 0)
+    }
+
+    Style {
+      TargetType: "TextBox"
+      BasedOn: resource "MaterialDesignTextBox"
+      #Setter("Foreground", resource dyn "PrimaryTextBrush")
+    }
+
+    Style {
+      TargetType: "ComboBox"
+      BasedOn: resource "MaterialDesignComboBox"
+      #Setter("Foreground", resource dyn "PrimaryTextBrush")
+    }
+
+    // Container
+    Container Key="Container" { }
+  }
+}

DiscordChatExporter.Gui/App.ammy.cs

@@ -0,0 +1,19 @@
+using System.Windows;
+
+namespace DiscordChatExporter.Gui
+{
+    public partial class App
+    {
+        private Container Container => (Container) Resources["Container"];
+
+        private void App_Startup(object sender, StartupEventArgs e)
+        {
+            Container.Init();
+        }
+
+        private void App_Exit(object sender, ExitEventArgs e)
+        {
+            Container.Cleanup();
+        }
+    }
+}

DiscordChatExporter.Gui/Container.cs

@@ -0,0 +1,49 @@
+using DiscordChatExporter.Core.Services;
+using DiscordChatExporter.Gui.ViewModels;
+using GalaSoft.MvvmLight.Ioc;
+using Microsoft.Practices.ServiceLocation;
+
+namespace DiscordChatExporter.Gui
+{
+    public class Container
+    {
+        public IErrorViewModel ErrorViewModel => Resolve<IErrorViewModel>();
+        public IExportDoneViewModel ExportDoneViewModel => Resolve<IExportDoneViewModel>();
+        public IExportSetupViewModel ExportSetupViewModel => Resolve<IExportSetupViewModel>();
+        public IMainViewModel MainViewModel => Resolve<IMainViewModel>();
+        public ISettingsViewModel SettingsViewModel => Resolve<ISettingsViewModel>();
+
+        private T Resolve<T>(string key = null)
+        {
+            return ServiceLocator.Current.GetInstance<T>(key);
+        }
+
+        public void Init()
+        {
+            ServiceLocator.SetLocatorProvider(() => SimpleIoc.Default);
+            SimpleIoc.Default.Reset();
+
+            // Services
+            SimpleIoc.Default.Register<IDataService, DataService>();
+            SimpleIoc.Default.Register<IExportService, ExportService>();
+            SimpleIoc.Default.Register<IMessageGroupService, MessageGroupService>();
+            SimpleIoc.Default.Register<ISettingsService, SettingsService>();
+
+            // Load settings
+            Resolve<ISettingsService>().Load();
+
+            // View models
+            SimpleIoc.Default.Register<IErrorViewModel, ErrorViewModel>(true);
+            SimpleIoc.Default.Register<IExportDoneViewModel, ExportDoneViewModel>(true);
+            SimpleIoc.Default.Register<IExportSetupViewModel, ExportSetupViewModel>(true);
+            SimpleIoc.Default.Register<IMainViewModel, MainViewModel>(true);
+            SimpleIoc.Default.Register<ISettingsViewModel, SettingsViewModel>(true);
+        }
+
+        public void Cleanup()
+        {
+            // Save settings
+            ServiceLocator.Current.GetInstance<ISettingsService>().Save();
+        }
+    }
+}

DiscordChatExporter.Gui/DiscordChatExporter.Gui.csproj

@@ -0,0 +1,202 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{732A67AF-93DE-49DF-B10F-FD74710B7863}</ProjectGuid>
+    <OutputType>WinExe</OutputType>
+    <RootNamespace>DiscordChatExporter.Gui</RootNamespace>
+    <AssemblyName>DiscordChatExporter</AssemblyName>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <ProjectTypeGuids>{60dc8134-eba5-43b8-bcc9-bb4bc16c2548};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <WarningLevel>4</WarningLevel>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+    <NuGetPackageImportStamp>
+    </NuGetPackageImportStamp>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup>
+    <ApplicationIcon>..\favicon.ico</ApplicationIcon>
+  </PropertyGroup>
+  <PropertyGroup>
+    <StartupObject />
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="AmmySidekick, Version=1.0.0.0, Culture=neutral, PublicKeyToken=7c1296d24569a67d, processorArchitecture=MSIL">
+      <HintPath>..\packages\Ammy.WPF.1.2.87\lib\net40\AmmySidekick.dll</HintPath>
+    </Reference>
+    <Reference Include="Costura, Version=1.6.2.0, Culture=neutral, PublicKeyToken=9919ef960d84173d, processorArchitecture=MSIL">
+      <HintPath>..\packages\Costura.Fody.1.6.2\lib\dotnet\Costura.dll</HintPath>
+      <Private>False</Private>
+    </Reference>
+    <Reference Include="GalaSoft.MvvmLight, Version=5.3.0.19026, Culture=neutral, PublicKeyToken=e7570ab207bcb616, processorArchitecture=MSIL">
+      <HintPath>..\packages\MvvmLightLibs.5.3.0.0\lib\net45\GalaSoft.MvvmLight.dll</HintPath>
+    </Reference>
+    <Reference Include="GalaSoft.MvvmLight.Extras, Version=5.3.0.19032, Culture=neutral, PublicKeyToken=669f0b5e8f868abf, processorArchitecture=MSIL">
+      <HintPath>..\packages\MvvmLightLibs.5.3.0.0\lib\net45\GalaSoft.MvvmLight.Extras.dll</HintPath>
+    </Reference>
+    <Reference Include="GalaSoft.MvvmLight.Platform, Version=5.3.0.19032, Culture=neutral, PublicKeyToken=5f873c45e98af8a1, processorArchitecture=MSIL">
+      <HintPath>..\packages\MvvmLightLibs.5.3.0.0\lib\net45\GalaSoft.MvvmLight.Platform.dll</HintPath>
+    </Reference>
+    <Reference Include="MaterialDesignColors, Version=1.1.3.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\MaterialDesignColors.1.1.3\lib\net45\MaterialDesignColors.dll</HintPath>
+    </Reference>
+    <Reference Include="MaterialDesignThemes.Wpf, Version=2.3.1.953, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\MaterialDesignThemes.2.3.1.953\lib\net45\MaterialDesignThemes.Wpf.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.Practices.ServiceLocation, Version=1.3.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\packages\CommonServiceLocator.1.3\lib\portable-net4+sl5+netcore45+wpa81+wp8\Microsoft.Practices.ServiceLocation.dll</HintPath>
+    </Reference>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Windows.Interactivity, Version=4.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\packages\MvvmLightLibs.5.3.0.0\lib\net45\System.Windows.Interactivity.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Xaml">
+      <RequiredTargetFramework>4.0</RequiredTargetFramework>
+    </Reference>
+    <Reference Include="System.Xml" />
+    <Reference Include="Tyrrrz.Extensions, Version=1.5.0.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\Tyrrrz.Extensions.1.5.0\lib\net45\Tyrrrz.Extensions.dll</HintPath>
+    </Reference>
+    <Reference Include="WindowsBase" />
+    <Reference Include="PresentationCore" />
+    <Reference Include="PresentationFramework" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Messages\ShowErrorMessage.cs" />
+    <Compile Include="Messages\ShowExportDoneMessage.cs" />
+    <Compile Include="Messages\ShowExportSetupMessage.cs" />
+    <Compile Include="Messages\ShowSettingsMessage.cs" />
+    <Compile Include="Messages\StartExportMessage.cs" />
+    <Compile Include="ViewModels\ErrorViewModel.cs" />
+    <Compile Include="ViewModels\ExportSetupViewModel.cs" />
+    <Compile Include="ViewModels\IErrorViewModel.cs" />
+    <Compile Include="ViewModels\IExportSetupViewModel.cs" />
+    <Compile Include="ViewModels\ISettingsViewModel.cs" />
+    <Compile Include="ViewModels\IExportDoneViewModel.cs" />
+    <Compile Include="ViewModels\SettingsViewModel.cs" />
+    <Compile Include="ViewModels\ExportDoneViewModel.cs" />
+    <Compile Include="Views\ErrorDialog.ammy.cs">
+      <DependentUpon>ErrorDialog.ammy</DependentUpon>
+    </Compile>
+    <Compile Include="Views\ExportDoneDialog.ammy.cs">
+      <DependentUpon>ExportDoneDialog.ammy</DependentUpon>
+    </Compile>
+    <Compile Include="Views\ExportSetupDialog.ammy.cs">
+      <DependentUpon>ExportSetupDialog.ammy</DependentUpon>
+    </Compile>
+    <Compile Include="Views\SettingsDialog.ammy.cs">
+      <DependentUpon>SettingsDialog.ammy</DependentUpon>
+    </Compile>
+    <Page Include="App.g.xaml">
+      <SubType>Designer</SubType>
+      <Generator>XamlIntelliSenseFileGenerator</Generator>
+      <DependentUpon>App.ammy</DependentUpon>
+    </Page>
+    <Page Include="Views\ErrorDialog.g.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+      <DependentUpon>ErrorDialog.ammy</DependentUpon>
+    </Page>
+    <Page Include="Views\ExportDoneDialog.g.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+      <DependentUpon>ExportDoneDialog.ammy</DependentUpon>
+    </Page>
+    <Page Include="Views\ExportSetupDialog.g.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+      <DependentUpon>ExportSetupDialog.ammy</DependentUpon>
+    </Page>
+    <Page Include="Views\MainWindow.g.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+      <DependentUpon>MainWindow.ammy</DependentUpon>
+    </Page>
+    <Compile Include="App.ammy.cs">
+      <DependentUpon>App.ammy</DependentUpon>
+    </Compile>
+    <Compile Include="Container.cs" />
+    <Compile Include="Program.cs" />
+    <Compile Include="ViewModels\IMainViewModel.cs" />
+    <Compile Include="ViewModels\MainViewModel.cs" />
+    <Compile Include="Views\MainWindow.ammy.cs">
+      <DependentUpon>MainWindow.ammy</DependentUpon>
+    </Compile>
+    <Page Include="Views\SettingsDialog.g.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+      <DependentUpon>SettingsDialog.ammy</DependentUpon>
+    </Page>
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Properties\AssemblyInfo.cs">
+      <SubType>Code</SubType>
+    </Compile>
+    <Compile Include="Properties\Resources.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DesignTime>True</DesignTime>
+      <DependentUpon>Resources.resx</DependentUpon>
+    </Compile>
+    <EmbeddedResource Include="Properties\Resources.resx">
+      <Generator>ResXFileCodeGenerator</Generator>
+      <LastGenOutput>Resources.Designer.cs</LastGenOutput>
+    </EmbeddedResource>
+    <None Include="App.ammy" />
+    <None Include="lib.ammy" />
+    <None Include="packages.config">
+      <SubType>Designer</SubType>
+    </None>
+    <None Include="Views\ErrorDialog.ammy" />
+    <None Include="Views\ExportDoneDialog.ammy" />
+    <None Include="Views\ExportSetupDialog.ammy" />
+    <None Include="Views\MainWindow.ammy" />
+    <None Include="Views\SettingsDialog.ammy" />
+  </ItemGroup>
+  <ItemGroup>
+    <Resource Include="..\favicon.ico" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\DiscordChatExporter.Core\DiscordChatExporter.Core.csproj">
+      <Project>{707c0cd0-a7e0-4cab-8db9-07a45cb87377}</Project>
+      <Name>DiscordChatExporter.Core</Name>
+    </ProjectReference>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="FodyWeavers.xml" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <Import Project="..\packages\Ammy.1.2.87\build\Ammy.targets" Condition="Exists('..\packages\Ammy.1.2.87\build\Ammy.targets')" />
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('..\packages\Ammy.1.2.87\build\Ammy.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Ammy.1.2.87\build\Ammy.targets'))" />
+    <Error Condition="!Exists('..\packages\Costura.Fody.1.6.2\build\dotnet\Costura.Fody.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Costura.Fody.1.6.2\build\dotnet\Costura.Fody.targets'))" />
+    <Error Condition="!Exists('..\packages\Fody.2.3.18\build\Fody.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Fody.2.3.18\build\Fody.targets'))" />
+  </Target>
+  <Import Project="..\packages\Costura.Fody.1.6.2\build\dotnet\Costura.Fody.targets" Condition="Exists('..\packages\Costura.Fody.1.6.2\build\dotnet\Costura.Fody.targets')" />
+  <Import Project="..\packages\Fody.2.3.18\build\Fody.targets" Condition="Exists('..\packages\Fody.2.3.18\build\Fody.targets')" />
+</Project>

DiscordChatExporter.Gui/FodyWeavers.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Weavers>
+  <Costura />
+</Weavers>

DiscordChatExporter.Gui/Messages/ShowErrorMessage.cs

@@ -0,0 +1,12 @@
+namespace DiscordChatExporter.Gui.Messages
+{
+    public class ShowErrorMessage
+    {
+        public string Message { get; }
+
+        public ShowErrorMessage(string message)
+        {
+            Message = message;
+        }
+    }
+}

DiscordChatExporter.Gui/Messages/ShowExportDoneMessage.cs

@@ -0,0 +1,12 @@
+namespace DiscordChatExporter.Gui.Messages
+{
+    public class ShowExportDoneMessage
+    {
+        public string FilePath { get; }
+
+        public ShowExportDoneMessage(string filePath)
+        {
+            FilePath = filePath;
+        }
+    }
+}

DiscordChatExporter.Gui/Messages/ShowExportSetupMessage.cs

@@ -0,0 +1,17 @@
+using DiscordChatExporter.Core.Models;
+
+namespace DiscordChatExporter.Gui.Messages
+{
+    public class ShowExportSetupMessage
+    {
+        public Guild Guild { get; }
+
+        public Channel Channel { get; }
+
+        public ShowExportSetupMessage(Guild guild, Channel channel)
+        {
+            Guild = guild;
+            Channel = channel;
+        }
+    }
+}

DiscordChatExporter.Gui/Messages/ShowSettingsMessage.cs

@@ -0,0 +1,6 @@
+namespace DiscordChatExporter.Gui.Messages
+{
+    public class ShowSettingsMessage
+    {
+    }
+}

DiscordChatExporter.Gui/Messages/StartExportMessage.cs

@@ -0,0 +1,28 @@
+using System;
+using DiscordChatExporter.Core.Models;
+
+namespace DiscordChatExporter.Gui.Messages
+{
+    public class StartExportMessage
+    {
+        public Channel Channel { get; }
+
+        public string FilePath { get; }
+
+        public ExportFormat Format { get; }
+
+        public DateTime? From { get; }
+
+        public DateTime? To { get; }
+
+        public StartExportMessage(Channel channel, string filePath, ExportFormat format,
+            DateTime? from, DateTime? to)
+        {
+            Channel = channel;
+            FilePath = filePath;
+            Format = format;
+            From = from;
+            To = to;
+        }
+    }
+}

DiscordChatExporter.Gui/Program.cs

@@ -0,0 +1,17 @@
+using System;
+using AmmySidekick;
+
+namespace DiscordChatExporter.Gui
+{
+    public static class Program
+    {
+        [STAThread]
+        public static void Main()
+        {
+            var app = new App();
+            app.InitializeComponent();
+            RuntimeUpdateHandler.Register(app, $"/{Ammy.GetAssemblyName(app)};component/App.g.xaml");
+            app.Run();
+        }
+    }
+}

DiscordChatExporter.Gui/Properties/AssemblyInfo.cs

@@ -0,0 +1,7 @@
+using System.Reflection;
+
+[assembly: AssemblyTitle("DiscordChatExporter")]
+[assembly: AssemblyCompany("Tyrrrz")]
+[assembly: AssemblyCopyright("Copyright (c) 2017-2018 Alexey Golub")]
+[assembly: AssemblyVersion("2.3")]
+[assembly: AssemblyFileVersion("2.3")]

DiscordChatExporter.Gui/Properties/Resources.Designer.cs

@@ -0,0 +1,63 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace DiscordChatExporter.Gui.Properties {
+    using System;
+    
+    
+    /// <summary>
+    ///   A strongly-typed resource class, for looking up localized strings, etc.
+    /// </summary>
+    // This class was auto-generated by the StronglyTypedResourceBuilder
+    // class via a tool like ResGen or Visual Studio.
+    // To add or remove a member, edit your .ResX file then rerun ResGen
+    // with the /str option, or rebuild your VS project.
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "15.0.0.0")]
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    internal class Resources {
+        
+        private static global::System.Resources.ResourceManager resourceMan;
+        
+        private static global::System.Globalization.CultureInfo resourceCulture;
+        
+        [global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+        internal Resources() {
+        }
+        
+        /// <summary>
+        ///   Returns the cached ResourceManager instance used by this class.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Resources.ResourceManager ResourceManager {
+            get {
+                if (object.ReferenceEquals(resourceMan, null)) {
+                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("DiscordChatExporter.Gui.Properties.Resources", typeof(Resources).Assembly);
+                    resourceMan = temp;
+                }
+                return resourceMan;
+            }
+        }
+        
+        /// <summary>
+        ///   Overrides the current thread's CurrentUICulture property for all
+        ///   resource lookups using this strongly typed resource class.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Globalization.CultureInfo Culture {
+            get {
+                return resourceCulture;
+            }
+            set {
+                resourceCulture = value;
+            }
+        }
+    }
+}

DiscordChatExporter.Gui/Properties/Resources.resx

@@ -0,0 +1,117 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

DiscordChatExporter.Gui/ViewModels/ErrorViewModel.cs

@@ -0,0 +1,19 @@
+using DiscordChatExporter.Gui.Messages;
+using GalaSoft.MvvmLight;
+
+namespace DiscordChatExporter.Gui.ViewModels
+{
+    public class ErrorViewModel : ViewModelBase, IErrorViewModel
+    {
+        public string Message { get; private set; }
+
+        public ErrorViewModel()
+        {
+            // Messages
+            MessengerInstance.Register<ShowErrorMessage>(this, m =>
+            {
+                Message = m.Message;
+            });
+        }
+    }
+}

DiscordChatExporter.Gui/ViewModels/ExportDoneViewModel.cs

@@ -0,0 +1,32 @@
+using System.Diagnostics;
+using DiscordChatExporter.Gui.Messages;
+using GalaSoft.MvvmLight;
+using GalaSoft.MvvmLight.CommandWpf;
+
+namespace DiscordChatExporter.Gui.ViewModels
+{
+    public class ExportDoneViewModel : ViewModelBase, IExportDoneViewModel
+    {
+        private string _filePath;
+
+        // Commands
+        public RelayCommand OpenCommand { get; }
+
+        public ExportDoneViewModel()
+        {
+            // Commands
+            OpenCommand = new RelayCommand(Open);
+
+            // Messages
+            MessengerInstance.Register<ShowExportDoneMessage>(this, m =>
+            {
+                _filePath = m.FilePath;
+            });
+        }
+
+        private void Open()
+        {
+            Process.Start(_filePath);
+        }
+    }
+}

DiscordChatExporter.Gui/ViewModels/ExportSetupViewModel.cs

@@ -0,0 +1,100 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using DiscordChatExporter.Core.Models;
+using DiscordChatExporter.Core.Services;
+using DiscordChatExporter.Gui.Messages;
+using GalaSoft.MvvmLight;
+using GalaSoft.MvvmLight.CommandWpf;
+using Tyrrrz.Extensions;
+
+namespace DiscordChatExporter.Gui.ViewModels
+{
+    public class ExportSetupViewModel : ViewModelBase, IExportSetupViewModel
+    {
+        private readonly ISettingsService _settingsService;
+
+        private string _filePath;
+        private ExportFormat _format;
+        private DateTime? _from;
+        private DateTime? _to;
+
+        public Guild Guild { get; private set; }
+
+        public Channel Channel { get; private set; }
+
+        public string FilePath
+        {
+            get => _filePath;
+            set
+            {
+                Set(ref _filePath, value);
+                ExportCommand.RaiseCanExecuteChanged();
+            }
+        }
+
+        public IReadOnlyList<ExportFormat> AvailableFormats { get; }
+
+        public ExportFormat SelectedFormat
+        {
+            get => _format;
+            set
+            {
+                Set(ref _format, value);
+
+                // Replace extension in path
+                var newExt = value.GetFileExtension();
+                if (FilePath != null && !FilePath.EndsWith(newExt))
+                    FilePath = FilePath.SubstringUntilLast(".") + "." + newExt;
+            }
+        }
+
+        public DateTime? From
+        {
+            get => _from;
+            set => Set(ref _from, value);
+        }
+
+        public DateTime? To
+        {
+            get => _to;
+            set => Set(ref _to, value);
+        }
+
+        // Commands
+        public RelayCommand ExportCommand { get; }
+
+        public ExportSetupViewModel(ISettingsService settingsService)
+        {
+            _settingsService = settingsService;
+
+            // Defaults
+            AvailableFormats = Enum.GetValues(typeof(ExportFormat)).Cast<ExportFormat>().ToArray();
+
+            // Commands
+            ExportCommand = new RelayCommand(Export, () => FilePath.IsNotBlank());
+
+            // Messages
+            MessengerInstance.Register<ShowExportSetupMessage>(this, m =>
+            {
+                Guild = m.Guild;
+                Channel = m.Channel;
+                SelectedFormat = _settingsService.LastExportFormat;
+                FilePath = $"{Guild} - {Channel}.{SelectedFormat.GetFileExtension()}"
+                    .Replace(Path.GetInvalidFileNameChars(), '_');
+                From = null;
+                To = null;
+            });
+        }
+
+        private void Export()
+        {
+            // Save format
+            _settingsService.LastExportFormat = SelectedFormat;
+
+            // Start export
+            MessengerInstance.Send(new StartExportMessage(Channel, FilePath, SelectedFormat, From, To));
+        }
+    }
+}

DiscordChatExporter.Gui/ViewModels/IErrorViewModel.cs

@@ -0,0 +1,7 @@
+namespace DiscordChatExporter.Gui.ViewModels
+{
+    public interface IErrorViewModel
+    {
+        string Message { get; }
+    }
+}

DiscordChatExporter.Gui/ViewModels/IExportDoneViewModel.cs

@@ -0,0 +1,9 @@
+using GalaSoft.MvvmLight.CommandWpf;
+
+namespace DiscordChatExporter.Gui.ViewModels
+{
+    public interface IExportDoneViewModel
+    {
+        RelayCommand OpenCommand { get; }
+    }
+}

DiscordChatExporter.Gui/ViewModels/IExportSetupViewModel.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using DiscordChatExporter.Core.Models;
+using GalaSoft.MvvmLight.CommandWpf;
+
+namespace DiscordChatExporter.Gui.ViewModels
+{
+    public interface IExportSetupViewModel
+    {
+        Guild Guild { get; }
+        Channel Channel { get; }
+        string FilePath { get; set; }
+        IReadOnlyList<ExportFormat> AvailableFormats { get; }
+        ExportFormat SelectedFormat { get; set; }
+        DateTime? From { get; set; }
+        DateTime? To { get; set; }
+
+        RelayCommand ExportCommand { get; }
+    }
+}

DiscordChatExporter.Gui/ViewModels/IMainViewModel.cs

@@ -0,0 +1,23 @@
+using System.Collections.Generic;
+using DiscordChatExporter.Core.Models;
+using GalaSoft.MvvmLight.CommandWpf;
+
+namespace DiscordChatExporter.Gui.ViewModels
+{
+    public interface IMainViewModel
+    {
+        bool IsBusy { get; }
+        bool IsDataAvailable { get; }
+
+        string Token { get; set; }
+
+        IReadOnlyList<Guild> AvailableGuilds { get; }
+        Guild SelectedGuild { get; set; }
+        IReadOnlyList<Channel> AvailableChannels { get; }
+
+        RelayCommand PullDataCommand { get; }
+        RelayCommand ShowSettingsCommand { get; }
+        RelayCommand ShowAboutCommand { get; }
+        RelayCommand<Channel> ShowExportSetupCommand { get; }
+    }
+}

DiscordChatExporter.Gui/ViewModels/ISettingsViewModel.cs

@@ -0,0 +1,8 @@
+namespace DiscordChatExporter.Gui.ViewModels
+{
+    public interface ISettingsViewModel
+    {
+        string DateFormat { get; set; }
+        int MessageGroupLimit { get; set; }
+    }
+}

DiscordChatExporter.Gui/ViewModels/MainViewModel.cs

@@ -0,0 +1,211 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Net;
+using DiscordChatExporter.Core.Exceptions;
+using DiscordChatExporter.Core.Models;
+using DiscordChatExporter.Core.Services;
+using DiscordChatExporter.Gui.Messages;
+using GalaSoft.MvvmLight;
+using GalaSoft.MvvmLight.CommandWpf;
+using Tyrrrz.Extensions;
+
+namespace DiscordChatExporter.Gui.ViewModels
+{
+    public class MainViewModel : ViewModelBase, IMainViewModel
+    {
+        private readonly ISettingsService _settingsService;
+        private readonly IDataService _dataService;
+        private readonly IMessageGroupService _messageGroupService;
+        private readonly IExportService _exportService;
+
+        private readonly Dictionary<Guild, IReadOnlyList<Channel>> _guildChannelsMap;
+
+        private bool _isBusy;
+        private string _token;
+        private IReadOnlyList<Guild> _availableGuilds;
+        private Guild _selectedGuild;
+        private IReadOnlyList<Channel> _availableChannels;
+
+        public bool IsBusy
+        {
+            get => _isBusy;
+            private set
+            {
+                Set(ref _isBusy, value);
+                PullDataCommand.RaiseCanExecuteChanged();
+                ShowExportSetupCommand.RaiseCanExecuteChanged();
+            }
+        }
+
+        public bool IsDataAvailable => AvailableGuilds.NotNullAndAny();
+
+        public string Token
+        {
+            get => _token;
+            set
+            {
+                // Remove invalid chars
+                value = value?.Trim('"');
+
+                Set(ref _token, value);
+                PullDataCommand.RaiseCanExecuteChanged();
+            }
+        }
+
+        public IReadOnlyList<Guild> AvailableGuilds
+        {
+            get => _availableGuilds;
+            private set
+            {
+                Set(ref _availableGuilds, value);
+                RaisePropertyChanged(() => IsDataAvailable);
+            }
+        }
+
+        public Guild SelectedGuild
+        {
+            get => _selectedGuild;
+            set
+            {
+                Set(ref _selectedGuild, value);
+                AvailableChannels = value != null ? _guildChannelsMap[value] : new Channel[0];
+                ShowExportSetupCommand.RaiseCanExecuteChanged();
+            }
+        }
+
+        public IReadOnlyList<Channel> AvailableChannels
+        {
+            get => _availableChannels;
+            private set => Set(ref _availableChannels, value);
+        }
+
+        public RelayCommand PullDataCommand { get; }
+        public RelayCommand ShowSettingsCommand { get; }
+        public RelayCommand ShowAboutCommand { get; }
+        public RelayCommand<Channel> ShowExportSetupCommand { get; }
+
+        public MainViewModel(ISettingsService settingsService, IDataService dataService,
+            IMessageGroupService messageGroupService, IExportService exportService)
+        {
+            _settingsService = settingsService;
+            _dataService = dataService;
+            _messageGroupService = messageGroupService;
+            _exportService = exportService;
+
+            _guildChannelsMap = new Dictionary<Guild, IReadOnlyList<Channel>>();
+
+            // Commands
+            PullDataCommand = new RelayCommand(PullData, () => Token.IsNotBlank() && !IsBusy);
+            ShowSettingsCommand = new RelayCommand(ShowSettings);
+            ShowAboutCommand = new RelayCommand(ShowAbout);
+            ShowExportSetupCommand = new RelayCommand<Channel>(ShowExportSetup, _ => !IsBusy);
+
+            // Messages
+            MessengerInstance.Register<StartExportMessage>(this, m =>
+            {
+                Export(m.Channel, m.FilePath, m.Format, m.From, m.To);
+            });
+
+            // Defaults
+            _token = _settingsService.LastToken;
+        }
+
+        private async void PullData()
+        {
+            IsBusy = true;
+
+            // Copy token so it doesn't get mutated
+            var token = Token;
+
+            // Save token
+            _settingsService.LastToken = token;
+
+            // Clear existing
+            _guildChannelsMap.Clear();
+
+            try
+            {
+                // Get DM channels
+                {
+                    var channels = await _dataService.GetDirectMessageChannelsAsync(token);
+                    var guild = Guild.DirectMessages;
+                    _guildChannelsMap[guild] = channels.ToArray();
+                }
+
+                // Get guild channels
+                {
+                    var guilds = await _dataService.GetUserGuildsAsync(token);
+                    foreach (var guild in guilds)
+                    {
+                        var channels = await _dataService.GetGuildChannelsAsync(token, guild.Id);
+                        _guildChannelsMap[guild] = channels.Where(c => c.Type == ChannelType.GuildTextChat).ToArray();
+                    }
+                }
+            }
+            catch (HttpErrorStatusCodeException ex) when (ex.StatusCode == HttpStatusCode.Unauthorized)
+            {
+                const string message = "Unauthorized to perform request. Make sure token is valid.";
+                MessengerInstance.Send(new ShowErrorMessage(message));
+            }
+            catch (HttpErrorStatusCodeException ex) when (ex.StatusCode == HttpStatusCode.Forbidden)
+            {
+                const string message = "Forbidden to perform request. The account may be locked by 2FA.";
+                MessengerInstance.Send(new ShowErrorMessage(message));
+            }
+
+            AvailableGuilds = _guildChannelsMap.Keys.ToArray();
+            SelectedGuild = AvailableGuilds.FirstOrDefault();
+            IsBusy = false;
+        }
+
+        private void ShowSettings()
+        {
+            MessengerInstance.Send(new ShowSettingsMessage());
+        }
+
+        private void ShowAbout()
+        {
+            Process.Start("https://github.com/Tyrrrz/DiscordChatExporter");
+        }
+
+        private void ShowExportSetup(Channel channel)
+        {
+            MessengerInstance.Send(new ShowExportSetupMessage(SelectedGuild, channel));
+        }
+
+        private async void Export(Channel channel, string filePath, ExportFormat format, DateTime? from, DateTime? to)
+        {
+            IsBusy = true;
+
+            // Get last used token
+            var token = _settingsService.LastToken;
+
+            try
+            {
+                // Get messages
+                var messages = await _dataService.GetChannelMessagesAsync(token, channel.Id, from, to);
+
+                // Group them
+                var messageGroups = _messageGroupService.GroupMessages(messages);
+
+                // Create log
+                var log = new ChannelChatLog(SelectedGuild, channel, messageGroups, messages.Count);
+
+                // Export
+                await _exportService.ExportAsync(format, filePath, log);
+
+                // Notify completion
+                MessengerInstance.Send(new ShowExportDoneMessage(filePath));
+            }
+            catch (HttpErrorStatusCodeException ex) when (ex.StatusCode == HttpStatusCode.Forbidden)
+            {
+                const string message = "Forbidden to view messages in that channel.";
+                MessengerInstance.Send(new ShowErrorMessage(message));
+            }
+
+            IsBusy = false;
+        }
+    }
+}

DiscordChatExporter.Gui/ViewModels/SettingsViewModel.cs

@@ -0,0 +1,28 @@
+using DiscordChatExporter.Core.Services;
+using GalaSoft.MvvmLight;
+using Tyrrrz.Extensions;
+
+namespace DiscordChatExporter.Gui.ViewModels
+{
+    public class SettingsViewModel : ViewModelBase, ISettingsViewModel
+    {
+        private readonly ISettingsService _settingsService;
+
+        public string DateFormat
+        {
+            get => _settingsService.DateFormat;
+            set => _settingsService.DateFormat = value;
+        }
+
+        public int MessageGroupLimit
+        {
+            get => _settingsService.MessageGroupLimit;
+            set => _settingsService.MessageGroupLimit = value.ClampMin(0);
+        }
+
+        public SettingsViewModel(ISettingsService settingsService)
+        {
+            _settingsService = settingsService;
+        }
+    }
+}

DiscordChatExporter.Gui/Views/ErrorDialog.ammy

@@ -0,0 +1,25 @@
+using MaterialDesignThemes.Wpf
+
+UserControl "DiscordChatExporter.Gui.Views.ErrorDialog" {
+  DataContext: bind ErrorViewModel from $resource Container
+  Width: 250
+
+  StackPanel {
+    // Message
+    TextBlock {
+      Margin: 16
+      FontSize: 16
+      TextWrapping: WrapWithOverflow
+      Text: bind Message
+    }
+
+    // OK
+    Button {
+      Margin: 8
+      Command: DialogHost.CloseDialogCommand
+      Content: "OK"
+      HorizontalAlignment: Right
+      Style: resource dyn "MaterialDesignFlatButton"
+    }
+  }
+}

DiscordChatExporter.Gui/Views/ErrorDialog.ammy.cs

@@ -0,0 +1,10 @@
+namespace DiscordChatExporter.Gui.Views
+{
+    public partial class ErrorDialog
+    {
+        public ErrorDialog()
+        {
+            InitializeComponent();
+        }
+    }
+}

DiscordChatExporter.Gui/Views/ExportDoneDialog.ammy

@@ -0,0 +1,38 @@
+using MaterialDesignThemes.Wpf
+
+UserControl "DiscordChatExporter.Gui.Views.ExportDoneDialog" {
+  DataContext: bind ExportDoneViewModel from $resource Container
+  Width: 250
+
+  StackPanel {
+    // Message
+    TextBlock {
+      Margin: 16
+      FontSize: 16
+      TextWrapping: WrapWithOverflow
+      Text: "Finished exporting chat log"
+    }
+
+    // Buttons
+    @StackPanelHorizontal {
+      HorizontalAlignment: Right
+
+      // Open
+      Button "OpenButton" {
+        Margin: 8
+        Click: OpenButton_Click
+        Command: bind OpenCommand
+        Content: "OPEN IT"
+        Style: resource dyn "MaterialDesignFlatButton"
+      }
+
+      // Dismiss
+      Button {
+        Margin: 8
+        Command: DialogHost.CloseDialogCommand
+        Content: "DISMISS"
+        Style: resource dyn "MaterialDesignFlatButton"
+      }
+    }
+  }
+}

DiscordChatExporter.Gui/Views/ExportDoneDialog.ammy.cs

@@ -0,0 +1,18 @@
+using System.Windows;
+using MaterialDesignThemes.Wpf;
+
+namespace DiscordChatExporter.Gui.Views
+{
+    public partial class ExportDoneDialog
+    {
+        public ExportDoneDialog()
+        {
+            InitializeComponent();
+        }
+
+        public void OpenButton_Click(object sender, RoutedEventArgs args)
+        {
+            DialogHost.CloseDialogCommand.Execute(null, null);
+        }
+    }
+}

DiscordChatExporter.Gui/Views/ExportSetupDialog.ammy

@@ -0,0 +1,88 @@
+using DiscordChatExporter.Core.Models
+using MaterialDesignThemes.Wpf
+
+UserControl "DiscordChatExporter.Gui.Views.ExportSetupDialog" {
+  DataContext: bind ExportSetupViewModel from $resource Container
+  Width: 325
+
+  StackPanel {
+    // File path
+    TextBox {
+      Margin: [16, 16, 16, 8]
+      HintAssist.Hint: "Output file"
+      HintAssist.IsFloating: true
+      IsReadOnly: true
+      Text: bind FilePath
+            set [ UpdateSourceTrigger: PropertyChanged ]
+    }
+
+    // Format
+    ComboBox {
+      Margin: [16, 8, 16, 8]
+      HintAssist.Hint: "Export format"
+      HintAssist.IsFloating: true
+      IsReadOnly: true
+      ItemsSource: bind AvailableFormats
+      SelectedItem: bind SelectedFormat
+
+      ItemTemplate: DataTemplate {
+        TextBlock {
+          Text: bind
+                convert (ExportFormat f) => Extensions.GetDisplayName(f)
+        }
+      }
+    }
+
+    // Date range
+    Grid {
+      #TwoColumns("*", "*")
+
+      DatePicker {
+        #Cell(0, 0)
+        Margin: [16, 20, 8, 8]
+        HintAssist.Hint: "From (optional)"
+        HintAssist.IsFloating: true
+        SelectedDate: bind From
+      }
+
+      DatePicker {
+        #Cell(0, 1)
+        Margin: [8, 20, 16, 8]
+        HintAssist.Hint: "To (optional)"
+        HintAssist.IsFloating: true
+        SelectedDate: bind To
+      }
+    }
+
+    // Buttons
+    @StackPanelHorizontal {
+      HorizontalAlignment: Right
+
+      // Browse
+      Button "BrowseButton" {
+        Margin: 8
+        Click: BrowseButton_Click
+        Content: "BROWSE"
+        Style: resource dyn "MaterialDesignFlatButton"
+      }
+
+      // Export
+      Button "ExportButton" {
+        Margin: 8
+        Click: ExportButton_Click
+        Command: bind ExportCommand
+        Content: "EXPORT"
+        IsDefault: true
+        Style: resource dyn "MaterialDesignFlatButton"
+      }
+
+      // Cancel
+      Button {
+        Margin: 8
+        Command: DialogHost.CloseDialogCommand
+        Content: "CANCEL"
+        Style: resource dyn "MaterialDesignFlatButton"
+      }
+    }
+  }
+}

DiscordChatExporter.Gui/Views/ExportSetupDialog.ammy.cs

@@ -0,0 +1,44 @@
+using System.Windows;
+using DiscordChatExporter.Core.Models;
+using DiscordChatExporter.Gui.ViewModels;
+using MaterialDesignThemes.Wpf;
+using Microsoft.Win32;
+
+namespace DiscordChatExporter.Gui.Views
+{
+    public partial class ExportSetupDialog
+    {
+        private IExportSetupViewModel ViewModel => (IExportSetupViewModel) DataContext;
+
+        public ExportSetupDialog()
+        {
+            InitializeComponent();
+        }
+
+        public void BrowseButton_Click(object sender, RoutedEventArgs args)
+        {
+            // Get file extension of the selected format
+            var ext = ViewModel.SelectedFormat.GetFileExtension();
+
+            // Open dialog
+            var sfd = new SaveFileDialog
+            {
+                FileName = ViewModel.FilePath,
+                Filter = $"{ext.ToUpperInvariant()} Files|*.{ext}|All Files|*.*",
+                AddExtension = true,
+                Title = "Select output file"
+            };
+
+            // Assign new file path if dialog was successful
+            if (sfd.ShowDialog() == true)
+            {
+                ViewModel.FilePath = sfd.FileName;
+            }
+        }
+
+        public void ExportButton_Click(object sender, RoutedEventArgs args)
+        {
+            DialogHost.CloseDialogCommand.Execute(null, null);
+        }
+    }
+}

DiscordChatExporter.Gui/Views/MainWindow.ammy

@@ -0,0 +1,271 @@
+using MaterialDesignThemes.Wpf
+using MaterialDesignThemes.Wpf.Transitions
+
+Window "DiscordChatExporter.Gui.Views.MainWindow" {
+  Title: "DiscordChatExporter"
+  Width: 600
+  Height: 550
+  Background: resource dyn "MaterialDesignPaper"
+  DataContext: bind MainViewModel from $resource Container
+  FocusManager.FocusedElement: bind from "TokenTextBox"
+  FontFamily: resource dyn "MaterialDesignFont"
+  Icon: "/DiscordChatExporter;component/favicon.ico"
+  SnapsToDevicePixels: true
+  TextElement.FontSize: 13
+  TextElement.FontWeight: Regular
+  TextElement.Foreground: resource dyn "SecondaryTextBrush"
+  TextOptions.TextFormattingMode: Ideal
+  TextOptions.TextRenderingMode: Auto
+  UseLayoutRounding: true
+  WindowStartupLocation: CenterScreen
+
+  DialogHost {
+    DockPanel {
+      IsEnabled: bind IsBusy
+                 convert (bool b) => b ? false : true
+
+      // Toolbar
+      Border {
+        DockPanel.Dock: Top
+        Background: resource dyn "PrimaryHueMidBrush"
+        TextElement.Foreground: resource dyn "SecondaryInverseTextBrush"
+        StackPanel {
+          Grid {
+            #TwoColumns("*", "Auto")
+
+            Card {
+              #Cell(0, 0)
+              Margin: [6, 6, 0, 6]
+
+              Grid {
+                #TwoColumns("*", "Auto")
+
+                // Token
+                TextBox "TokenTextBox" {
+                  #Cell(0, 0)
+                  Margin: 6
+                  BorderThickness: 0
+                  HintAssist.Hint: "Token"
+                  FontSize: 16
+                  Text: bind Token
+                        set [ UpdateSourceTrigger: PropertyChanged ]
+                  TextFieldAssist.DecorationVisibility: Hidden
+                  TextFieldAssist.TextBoxViewMargin: [0, 0, 2, 0]
+                }
+
+                // Submit
+                Button {
+                  #Cell(0, 1)
+                  Margin: [0, 6, 6, 6]
+                  Padding: 4
+                  Command: bind PullDataCommand
+                  IsDefault: true
+                  Style: resource dyn "MaterialDesignFlatButton"
+
+                  PackIcon {
+                    Width: 24
+                    Height: 24
+                    Kind: PackIconKind.ArrowRight
+                  }
+                }
+              }
+            }
+
+            // Popup menu
+            PopupBox {
+              #Cell(0, 1)
+              Foreground: resource dyn "PrimaryHueMidForegroundBrush"
+              PlacementMode: LeftAndAlignTopEdges
+
+              StackPanel {
+                Button {
+                  Command: bind ShowSettingsCommand
+                  Content: "Settings"
+                }
+                Button {
+                  Command: bind ShowAboutCommand
+                  Content: "About"
+                }
+              }
+            }
+          }
+
+          // Progress
+          ProgressBar {
+            Background: Transparent
+            IsIndeterminate: true
+            Visibility: bind IsBusy
+                             convert (bool b) => b ? Visibility.Visible : Visibility.Hidden
+          }
+        }
+      }
+
+      // Content
+      Grid {
+        DockPanel {
+          Background: resource dyn "MaterialDesignCardBackground"
+          Visibility: bind IsDataAvailable
+                      convert (bool b) => b ? Visibility.Visible : Visibility.Hidden
+
+          // Guilds
+          Border {
+            DockPanel.Dock: Left
+            BorderBrush: resource dyn "DividerBrush"
+            BorderThickness: "0 0 1 0"
+
+            ListBox {
+              ItemsSource: bind AvailableGuilds
+              ScrollViewer.VerticalScrollBarVisibility: Hidden
+              SelectedItem: bind SelectedGuild
+              VirtualizingStackPanel.IsVirtualizing: false
+
+              ItemTemplate: DataTemplate {
+                TransitioningContent {
+                  OpeningEffect: TransitionEffect {
+                    Duration: "0:0:0.3"
+                    Kind: SlideInFromLeft
+                  }
+
+                  Border {
+                    Margin: -8
+                    Background: Transparent
+                    Cursor: CursorType.Hand
+
+                    Image {
+                      Margin: [12, 4, 12, 4]
+                      Width: 48
+                      Height: 48
+                      Source: bind IconUrl
+                      ToolTip: bind Name
+                      OpacityMask: RadialGradientBrush {
+                        GradientStops: [
+                          GradientStop { Color: "#FF000000", Offset: 0 }
+                          GradientStop { Color: "#FF000000", Offset: 0.96 }
+                          GradientStop { Color: "#00000000", Offset: 1 }
+                        ]
+                      }
+                    }
+                  }
+                }
+              }
+            }
+          }
+
+          // Channels
+          Border {
+            ListBox {
+              ItemsSource: bind AvailableChannels
+              HorizontalContentAlignment: Stretch
+              VirtualizingStackPanel.IsVirtualizing: false
+
+              ItemTemplate: DataTemplate {
+                TransitioningContent {
+                  OpeningEffect: TransitionEffect {
+                    Duration: "0:0:0.3"
+                    Kind: SlideInFromLeft
+                  }
+
+                  @StackPanelHorizontal {
+                    Margin: -8
+                    Background: Transparent
+                    Cursor: CursorType.Hand
+                    InputBindings: [
+                      MouseBinding {
+                        Command: bind DataContext.ShowExportSetupCommand from $ancestor<ItemsControl>
+                        CommandParameter: bind
+                        MouseAction: LeftClick
+                      }
+                    ]
+
+                    PackIcon {
+                      Margin: [16, 7, 0, 6]
+                      Kind: PackIconKind.Pound
+                      VerticalAlignment: Center
+                    }
+                    TextBlock {
+                      Margin: [3, 8, 8, 8]
+                      FontSize: 14
+                      Text: bind Name
+                      VerticalAlignment: Center
+                    }  
+                  }
+                }
+              }
+            }
+          }
+        }
+
+        // Content placeholder
+        StackPanel {
+          Margin: [32, 32, 8, 8]
+          Visibility: bind IsDataAvailable
+                      convert (bool b) => b ? Visibility.Hidden : Visibility.Visible
+
+          TextBlock {
+            FontSize: 18
+            Text: "DiscordChatExporter needs your authorization token to work."
+          }
+
+          TextBlock {
+            Margin: [0, 8, 0, 0]
+            FontSize: 16
+            Text: "To obtain it, follow these steps:"
+          }
+
+          TextBlock {
+            Margin: [8, 0, 0, 0]
+            FontSize: 14
+
+            Run {
+              Text: "1. Open the Discord app"
+            }
+            LineBreak { }
+            Run {
+              Text: "2. Log in if you haven't"
+            }
+            LineBreak { }
+            Run {
+              Text: "3. Press"
+            }
+            Run {
+              Text: "Ctrl+Shift+I"
+              Foreground: resource dyn "PrimaryTextBrush"
+            }
+            LineBreak { }
+            Run {
+              Text: "4. Navigate to"
+            }
+            Run {
+              Text: "Application"
+              Foreground: resource dyn "PrimaryTextBrush"
+            }
+            Run { Text: "tab" }
+            LineBreak { }
+            Run {
+              Text: "5. Expand"
+            }
+            Run {
+              Text: "Storage > Local Storage > https://discordapp.com"
+              Foreground: resource dyn "PrimaryTextBrush"
+            }
+            LineBreak { }
+            Run {
+              Text: "6. Find"
+            }
+            Run {
+              Text: "&quot;token&quot;"
+              Foreground: resource dyn "PrimaryTextBrush"
+            }
+            Run {
+              Text: "under key and copy the value"
+            }
+            LineBreak { }
+            Run {
+              Text: "7. Paste the value in the textbox above"
+            }
+          }
+        }
+      }
+    }
+  }
+}

DiscordChatExporter.Gui/Views/MainWindow.ammy.cs

@@ -0,0 +1,27 @@
+using System.Reflection;
+using DiscordChatExporter.Gui.Messages;
+using GalaSoft.MvvmLight.Messaging;
+using MaterialDesignThemes.Wpf;
+using Tyrrrz.Extensions;
+
+namespace DiscordChatExporter.Gui.Views
+{
+    public partial class MainWindow
+    {
+        public MainWindow()
+        {
+            InitializeComponent();
+            Title += $" v{Assembly.GetExecutingAssembly().GetName().Version}";
+
+            // Dialogs
+            Messenger.Default.Register<ShowErrorMessage>(this,
+                m => DialogHost.Show(new ErrorDialog()).Forget());
+            Messenger.Default.Register<ShowExportDoneMessage>(this,
+                m => DialogHost.Show(new ExportDoneDialog()).Forget());
+            Messenger.Default.Register<ShowExportSetupMessage>(this,
+                m => DialogHost.Show(new ExportSetupDialog()).Forget());
+            Messenger.Default.Register<ShowSettingsMessage>(this,
+                m => DialogHost.Show(new SettingsDialog()).Forget());
+        }
+    }
+}

DiscordChatExporter.Gui/Views/SettingsDialog.ammy

@@ -0,0 +1,33 @@
+using MaterialDesignThemes.Wpf
+
+UserControl "DiscordChatExporter.Gui.Views.SettingsDialog" {
+  DataContext: bind SettingsViewModel from $resource Container
+  Width: 250
+
+  StackPanel {
+    // Date format
+    TextBox {
+      Margin: [16, 16, 16, 8]
+      HintAssist.Hint: "Date format"
+      HintAssist.IsFloating: true
+      Text: bind DateFormat
+    }
+
+    // Group limit
+    TextBox {
+      Margin: [16, 8, 16, 8]
+      HintAssist.Hint: "Message group limit"
+      HintAssist.IsFloating: true
+      Text: bind MessageGroupLimit
+    }
+
+    // Save
+    Button {
+      Margin: 8
+      Command: DialogHost.CloseDialogCommand
+      Content: "SAVE"
+      HorizontalAlignment: Right
+      Style: resource dyn "MaterialDesignFlatButton"
+    }
+  }
+}

DiscordChatExporter.Gui/Views/SettingsDialog.ammy.cs

@@ -0,0 +1,10 @@
+namespace DiscordChatExporter.Gui.Views
+{
+    public partial class SettingsDialog
+    {
+        public SettingsDialog()
+        {
+            InitializeComponent();
+        }
+    }
+}

DiscordChatExporter.Gui/lib.ammy

@@ -0,0 +1,238 @@
+mixin TwoColumns (one = "*", two = "*") for Grid {
+  combine ColumnDefinitions: [
+    ColumnDefinition { Width: $one }
+    ColumnDefinition { Width: $two }
+  ]
+}
+
+mixin ThreeColumns (one = none, two = none, three = none) for Grid {
+  #TwoColumns($one, $two)
+  combine ColumnDefinitions: ColumnDefinition { Width: $three }
+}
+
+mixin FourColumns (one = none, two = none, three = none, four = none) for Grid {
+  #ThreeColumns($one, $two, $three)
+  combine ColumnDefinitions: ColumnDefinition { Width: $four }
+}
+
+mixin FiveColumns (one = none, two = none, three = none, four = none, five = none) for Grid {
+  #FourColumns($one, $two, $three, $four)
+  combine ColumnDefinitions: ColumnDefinition { Width: $five }
+}
+
+mixin TwoRows (one = none, two = none) for Grid
+{
+  combine RowDefinitions: [
+    RowDefinition { Height: $one }
+    RowDefinition { Height: $two }
+  ]
+}
+
+mixin ThreeRows (one = none, two = none, three = none) for Grid
+{
+  #TwoRows($one, $two)
+  combine RowDefinitions: RowDefinition { Height: $three }
+}
+
+mixin FourRows (one = none, two = none, three = none, four = none) for Grid
+{
+  #ThreeRows($one, $two, $three)
+  combine RowDefinitions: RowDefinition { Height: $four }
+}
+
+mixin FiveRows (one = none, two = none, three = none, four = none, five = none) for Grid
+{
+  #FourRows($one, $two, $three, $four)
+  combine RowDefinitions: RowDefinition { Height: $five }
+}
+
+mixin Cell (row = none, column = none, rowSpan = none, columnSpan = none) for FrameworkElement {
+  Grid.Row: $row
+  Grid.Column: $column
+  Grid.RowSpan: $rowSpan
+  Grid.ColumnSpan: $columnSpan
+}
+
+alias ImageCached(source) {
+  Image {    
+    Source: BitmapImage {
+      UriCachePolicy: "Revalidate"
+      UriSource: $source
+    }
+  }
+}
+
+mixin Setter(property, value, targetName=none) for Style {
+  Setter { Property: $property, Value: $value, TargetName: $targetName }
+}
+
+/*
+mixin AddSetter(property, value, targetName=none) for Style {
+  combine Setters: #Setter($property, $value, $targetName) {}
+}*/
+
+alias DataTrigger(binding, bindingValue) {
+  DataTrigger { Binding: $binding, Value: $bindingValue }
+}
+
+alias Trigger(property, value) {
+  Trigger { Property: $property, Value: $value }
+}
+
+alias EventTrigger(event, sourceName=none) {
+  EventTrigger { RoutedEvent: $event, SourceName: $sourceName }
+}
+
+alias DataTrigger_SetProperty(binding, bindingValue, property, propertyValue) {
+  @DataTrigger ($binding, $bindingValue) {
+    #Setter($property, $propertyValue)
+  }
+}
+
+alias Trigger_SetProperty(triggerProperty, triggerValue, property, propertyValue) {
+  @Trigger ($triggerProperty, $triggerValue) {
+    #Setter($property, $propertyValue)
+  }
+}
+
+alias EventTrigger_SetProperty(event, property, propertyValue) {
+  @EventTrigger ($event) {
+    #Setter($property, $propertyValue)
+  }
+}
+alias VisibleIf_DataTrigger(binding, valueForVisible) {
+  @DataTrigger_SetProperty($binding, $valueForVisible, "Visibility", "Visible") {}
+}
+
+alias CollapsedIf_DataTrigger(binding, valueForCollapsed) {
+  @DataTrigger_SetProperty($binding, $valueForCollapsed, "Visibility", "Collapsed") {}
+}
+
+alias StackPanelHorizontal() {
+  StackPanel {
+    Orientation: Horizontal
+  }
+}
+
+alias GridItemsControl() {
+  ItemsControl {
+    ScrollViewer.HorizontalScrollBarVisibility: Disabled,
+
+    ItemsPanel: ItemsPanelTemplate { 
+      WrapPanel {
+        IsItemsHost: true
+        Orientation: Horizontal
+      }
+    }
+  }  
+}
+
+////////////////
+// Animations //
+////////////////
+
+alias DoubleAnimation(property, frm = "0", to = "1", duration = "0:0:1", targetName=none, beginTime=none) {
+  DoubleAnimation {
+    Storyboard.TargetProperty: $property
+    Storyboard.TargetName: $targetName
+    From: $frm
+    To: $to
+    Duration: $duration
+    BeginTime: $beginTime
+  }
+}
+
+alias DoubleAnimationStoryboard (property, frm = "0", to = "1", duration = "0:0:1", targetName=none) {
+  BeginStoryboard {
+    Storyboard {
+      @DoubleAnimation($property, $frm, $to, $duration, $targetName) {}
+    }
+  }
+}
+
+mixin DoubleAnimation_PropertyTrigger(triggerProperty, triggerValue, animationProperty, frm, to, duration) for Style {  
+  combine Triggers: @Trigger ($triggerProperty, $triggerValue) {
+    EnterActions: @DoubleAnimationStoryboard($animationProperty, $frm, $to, $duration) {}
+  }
+}
+
+mixin DoubleAnimation_PropertyTrigger_Toggle(triggerProperty, triggerValue, animationProperty, frm, to, duration) for Style {  
+  combine Triggers: @Trigger ($triggerProperty, $triggerValue) {
+    EnterActions: @DoubleAnimationStoryboard($animationProperty, $frm, $to, $duration) {}
+    ExitActions: @DoubleAnimationStoryboard($animationProperty, $to, $frm, $duration) {}
+  }
+}
+
+mixin DoubleAnimation_EventTrigger(triggerEvent, animationProperty, frm, to, duration) for Style {
+  combine Triggers: EventTrigger {    
+    RoutedEvent: $triggerEvent
+    @DoubleAnimationStoryboard($animationProperty, $frm, $to, $duration) {}
+  }
+}
+
+mixin DoubleAnimation_DataTrigger(binding, value, animationProperty, frm, to, duration) for Style {
+  combine Triggers: DataTrigger {  
+    Binding: $binding
+    Value: $value
+    EnterActions: @DoubleAnimationStoryboard($animationProperty, $frm, $to, $duration) {}
+  }
+}
+
+mixin FadeIn_OnProperty(property, value, frm = "0", to = "1", duration = "0:0:1") for Style {
+  #DoubleAnimation_PropertyTrigger($property, $value, "Opacity", $frm, $to, $duration)
+}
+
+mixin FadeOut_OnProperty(property, value, frm = "1", to = "0", duration = "0:0:1") for Style {
+  #DoubleAnimation_PropertyTrigger($property, $value, "Opacity", $frm, $to, $duration)
+}
+
+mixin FadeIn_OnEvent(event, frm = "0", to = "1", duration = "0:0:1") for Style {
+  #DoubleAnimation_EventTrigger($event, "Opacity", $frm, $to, $duration)
+}
+
+mixin FadeOut_OnEvent(event, frm = "1", to = "0", duration = "0:0:1") for Style {
+  #DoubleAnimation_EventTrigger($event, "Opacity", $frm, $to, $duration)
+}
+
+mixin FadeIn_OnData(binding, value, from_ = "0", to = "1", duration = "0:0:1") for Style {
+  #DoubleAnimation_DataTrigger($binding, $value, "Opacity", $from_, $to, $duration)
+}
+
+mixin FadeOut_OnData(binding, value, from_ = "1", to = "0", duration = "0:0:1") for Style {
+  #DoubleAnimation_DataTrigger($binding, $value, "Opacity", $from_, $to, $duration)
+}
+
+mixin Property_OnBinding(binding, bindingValue, property, propertyValue, initialValue) for Style {
+  #Setter("Visibility", $initialValue)
+  combine Triggers: [
+    @DataTrigger_SetProperty($binding, $bindingValue, $property, $propertyValue) {}
+  ]
+}
+
+mixin Visibility_OnBinding(binding, bindingValue, visibilityValue="Visible", initialValue="Collapsed") for Style {
+  #Property_OnBinding($binding, $bindingValue, "Visibility", $visibilityValue, $initialValue)
+}
+
+mixin Fade_OnBinding(binding, bindingValue) for Style {
+  #Setter("Visibility", "Visible")
+  #Setter("Opacity", "0")
+
+  combine Triggers: [
+    @DataTrigger($binding, $bindingValue) {
+      EnterActions: [
+        @DoubleAnimationStoryboard("Opacity", 0, 1, "0:0:0.5") {}  
+      ]
+      ExitActions: [
+        @DoubleAnimationStoryboard("Opacity", 1, 0, "0:0:0.5") {}  
+      ]
+      #Setter("Opacity", 1)
+    }
+    @Trigger("Opacity", 0) {
+      #Setter("Visibility", "Hidden")
+    }
+  ]
+}
+
+mixin MergeDictionary (source) for ResourceDictionary {
+  combine MergedDictionaries: ResourceDictionary { Source: $source }
+}

DiscordChatExporter.Gui/packages.config

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="Ammy" version="1.2.87" targetFramework="net461" />
+  <package id="Ammy.WPF" version="1.2.87" targetFramework="net461" />
+  <package id="CommonServiceLocator" version="1.3" targetFramework="net461" />
+  <package id="Costura.Fody" version="1.6.2" targetFramework="net461" developmentDependency="true" />
+  <package id="Fody" version="2.3.18" targetFramework="net461" developmentDependency="true" />
+  <package id="MaterialDesignColors" version="1.1.3" targetFramework="net461" />
+  <package id="MaterialDesignThemes" version="2.3.1.953" targetFramework="net461" />
+  <package id="MvvmLightLibs" version="5.3.0.0" targetFramework="net461" />
+  <package id="Tyrrrz.Extensions" version="1.5.0" targetFramework="net461" />
+</packages>