forgot to change version smh

Hope this works for now

EZPPClient Installer/EZPPClient Installer.csproj

@@ -90,13 +90,14 @@
       <DependentUpon>App.xaml</DependentUpon>
       <SubType>Code</SubType>
     </Compile>
-    <Compile Include="MD5File.cs" />
-    <Compile Include="DownloadUtil.cs" />
-    <Compile Include="MD5Util.cs" />
-    <Compile Include="ProcessUtil.cs" />
-    <Compile Include="Shortcut.cs" />
-    <Compile Include="UpdateState.cs" />
-    <Compile Include="Util.cs" />
+    <Compile Include="Models\MD5File.cs" />
+    <Compile Include="Utils\DownloadUtil.cs" />
+    <Compile Include="Utils\MD5Util.cs" />
+    <Compile Include="Utils\ProcessUtil.cs" />
+    <Compile Include="Utils\RegistryUtil.cs" />
+    <Compile Include="Utils\ReleaseStreamUtil.cs" />
+    <Compile Include="Enums\UpdateState.cs" />
+    <Compile Include="Utils\OsuUtil.cs" />
     <Compile Include="MainWindow.xaml.cs">
       <DependentUpon>MainWindow.xaml</DependentUpon>
       <SubType>Code</SubType>
@@ -136,12 +137,15 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
-    <PackageReference Include="DK.WshRuntime">
-      <Version>4.1.3.201115164</Version>
+    <PackageReference Include="DK.Standard">
+      <Version>4.137.4070.201115155</Version>
     </PackageReference>
     <PackageReference Include="ModernWpfUI">
       <Version>0.9.4</Version>
     </PackageReference>
+    <PackageReference Include="semver">
+      <Version>2.0.6</Version>
+    </PackageReference>
   </ItemGroup>
   <ItemGroup>
     <Resource Include="circle_new.ico" />
@@ -149,5 +153,16 @@
   <ItemGroup>
     <Content Include=".gitignore" />
   </ItemGroup>
+  <ItemGroup>
+    <COMReference Include="IWshRuntimeLibrary">
+      <Guid>{F935DC20-1CF0-11D0-ADB9-00C04FD58A0B}</Guid>
+      <VersionMajor>1</VersionMajor>
+      <VersionMinor>0</VersionMinor>
+      <Lcid>0</Lcid>
+      <WrapperTool>tlbimp</WrapperTool>
+      <Isolated>False</Isolated>
+      <EmbedInteropTypes>True</EmbedInteropTypes>
+    </COMReference>
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
 </Project>

EZPPClient Installer/MD5File.cs

@@ -1,33 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Security.Cryptography;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace EZPPClient_Installer
-{
-  class MD5File
-  {
-
-    private string md5;
-    private string name;
-
-    public MD5File(string name, string md5)
-    {
-      this.md5 = md5;
-      this.name = name;
-    }
-
-    public string getName()
-    {
-      return name;
-    }
-
-    public string getMD5()
-    {
-      return md5;
-    }
-
-  }
-}

EZPPClient Installer/MainWindow.xaml

@@ -5,17 +5,20 @@
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:local="clr-namespace:EZPPClient_Installer"
         mc:Ignorable="d"
-        Title="EZPPClient Installer" Height="232.051" Width="525.487"
+        Title="EZPPClient Installer" Height="293.333" Width="525"
         xmlns:ui="http://schemas.modernwpf.com/2019"
     ui:WindowHelper.UseModernWindowStyle="True" ResizeMode="CanMinimize" Icon="circle_new.ico" Topmost="True" WindowStartupLocation="CenterScreen">
     <ui:SimpleStackPanel Margin="12" Spacing="24">
-        <CheckBox x:Name="linkFoldersCheckbox" Content="Link Song and Skins Folder" HorizontalAlignment="Stretch" Height="32" VerticalAlignment="Top" Margin="150,62,150,-62" IsChecked="True" />
-        <TextBox x:Name="folderTextbox" HorizontalAlignment="Left" Height="32" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="422" Margin="10,-34,0,0" IsReadOnly="true"/>
-        <Button x:Name="InstallButton" Content="Install" HorizontalAlignment="Stretch" Height="32" VerticalAlignment="Bottom" Margin="176,0,176,-58" Style="{StaticResource AccentButtonStyle}" Click="Install_Click"/>
-        <Button x:Name="BrowseButton" Content="..." HorizontalAlignment="Stretch" Height="32" VerticalAlignment="Top" Margin="437,-82,10,0" Click="Browse_Click"/>
-        <Button x:Name="Uninstall_Button" Content="Uninstall" HorizontalAlignment="Stretch" Height="31" VerticalAlignment="Bottom" Margin="176,0,176,-47" Click="Uninstall_Button_Click" Background="#CCCB3737" Foreground="White" Visibility="Hidden"/>
-        <ProgressBar x:Name="Download_Progressbar" Height="1" VerticalAlignment="Top" Margin="15,-34,15,0" IsIndeterminate="True" Visibility="Hidden"/>
-        <Label x:Name="Download_Text" Content="Downloading: " Height="19" VerticalAlignment="Top" Margin="10,-82,10,0" Visibility="Hidden"/>
-        <TextBlock Margin="349,-47,0,24"><Hyperlink NavigateUri="https://ez-pp.farm" RequestNavigate="Hyperlink_RequestNavigate"><Run Text="Copyright @ EZPPFarm"/></Hyperlink></TextBlock>
+        <CheckBox x:Name="linkFoldersCheckbox" Content="Link Song and Skins Folder" HorizontalAlignment="Stretch" Height="32" VerticalAlignment="Top" Margin="150,125,150,-125" IsChecked="True" />
+        <TextBox x:Name="folderTextbox" HorizontalAlignment="Left" Height="32" TextWrapping="Wrap" Text="trying to locate osu! location..." VerticalAlignment="Top" Width="422" Margin="10,-27,0,-5" IsReadOnly="true"/>
+        <Button x:Name="InstallButton" Content="Install" HorizontalAlignment="Stretch" Height="32" VerticalAlignment="Bottom" Margin="176,0,176,-114" Style="{StaticResource AccentButtonStyle}" Click="Install_Click"/>
+        <Button x:Name="BrowseButton" Content="..." HorizontalAlignment="Stretch" Height="32" VerticalAlignment="Top" Margin="437,-75,10,0" Click="Browse_Click"/>
+        <Button x:Name="Uninstall_Button" Content="Uninstall" HorizontalAlignment="Stretch" Height="31" VerticalAlignment="Bottom" Margin="176,0,176,-100" Click="Uninstall_Button_Click" Foreground="White" Visibility="Hidden" IsCancel="True"/>
+        <ProgressBar x:Name="Download_Progressbar" Height="1" VerticalAlignment="Top" Margin="15,22,15,-26" IsIndeterminate="True" Visibility="Hidden"/>
+        <Label x:Name="Download_Text" Content="Downloading: " Height="19" VerticalAlignment="Top" Margin="10,-26,10,0" Visibility="Hidden"/>
+        <TextBlock Margin="349,14,0,-37"><Hyperlink NavigateUri="https://ez-pp.farm" RequestNavigate="Hyperlink_RequestNavigate"><Run Text="Copyright @ EZPPFarm"/></Hyperlink></TextBlock>
+        <ComboBox x:Name="ReleaseStreamComboBox" HorizontalAlignment="Left" Height="31" VerticalAlignment="Top" Width="475" Margin="10,-137,0,0" ClipToBounds="True" SelectionChanged="ReleaseStreamComboBox_SelectionChanged"/>
+        <Label x:Name="ReleaseStreamLabel" Content="Release:" HorizontalAlignment="Left" Height="19" VerticalAlignment="Top" Width="145" Margin="10,-181,0,0"/>
+        <Label Content="Path to osu! Folder:" HorizontalAlignment="Left" Height="19" VerticalAlignment="Top" Width="145" Margin="10,-263,0,0"/>
     </ui:SimpleStackPanel>
 </Window>

EZPPClient Installer/MainWindow.xaml.cs

@@ -5,16 +5,16 @@ using System.Threading.Tasks;
 using System.Runtime.InteropServices;
 using System.Windows;
 using System.Windows.Navigation;
-using System.Windows.Shapes;
 using System.IO;
 using System.Net;
-using System.Globalization;
 using ModernWpf.Controls;
 using System.Windows.Forms;
 using System.Media;
-using System.Runtime.InteropServices.ComTypes;
-using Shortcut;
-using Path = System.Windows.Shapes.Path;
+using Path = System.IO.Path;
+using File = System.IO.File;
+using EZPPClient_Installer.Utils;
+using IWshRuntimeLibrary;
+using Semver;
 
 #if DEBUG
 using MessageBox = System.Windows.MessageBox;
@@ -22,9 +22,6 @@ using MessageBox = System.Windows.MessageBox;
 
 namespace EZPPClient_Installer
 {
-  /// <summary>
-  /// Interaction logic for MainWindow.xaml
-  /// </summary>
   public partial class MainWindow : Window
   {
 
@@ -33,10 +30,19 @@ namespace EZPPClient_Installer
     [DllImport("kernel32.dll")]
     private static extern bool CreateSymbolicLink(string lpSymlinkFileName, string lpTargetFileName, SymbolicLink dwFlags);
 
-    private static double VERSION = 1.6;
+    private static SemVersion VERSION = new SemVersion(1, 1, 2);
+
+    public static string RELEASESTREAM;
 
     public MainWindow()
     {
+      var alreadyRunning = System.Diagnostics.Process.GetProcessesByName(System.IO.Path.GetFileNameWithoutExtension(System.Reflection.Assembly.GetEntryAssembly().Location)).Count() > 1;
+      if (alreadyRunning)
+      {
+        this.Close();
+        return;
+      }
+       
       Instance = this;
       InitializeComponent();
       Init();
@@ -62,7 +68,9 @@ namespace EZPPClient_Installer
       string versionString = "v" + VERSION;
       InstallerWindow.Title = "EZPPClient Installer " + versionString.Replace(",", ".");
 
-      string osuPath = Util.osuInstallDir();
+      await FetchReleaseStreams();
+
+      string osuPath = OsuUtil.osuInstallDir();
 
       if (osuPath.EndsWith(@"\EZPPClient"))
       {
@@ -72,6 +80,9 @@ namespace EZPPClient_Installer
       bool isValidFolder = await isValidOsuFolder(osuPath);
       UpdateInstallButton(!string.IsNullOrEmpty(osuPath));
 
+      if(string.IsNullOrEmpty(osuPath))
+        folderTextbox.Text = "";
+
       if (!string.IsNullOrEmpty(osuPath) && isValidFolder)
       {
         bool foundInstall = isEZPPClientInstallationFound(osuPath);
@@ -83,7 +94,7 @@ namespace EZPPClient_Installer
           UpdateInstallButton(false);
 
 
-          List<string> outdatedFiles = DownloadUtil.FilesToDownload(osuEZPPPath, false);
+          List<string> outdatedFiles = await DownloadUtil.FilesToDownload(osuEZPPPath, false);
 
           if (!IsEmpty(outdatedFiles))
           {
@@ -96,12 +107,31 @@ namespace EZPPClient_Installer
         folderTextbox.Text = osuPath;
       }
       else
+      {
+        folderTextbox.Text = "";
         await new ContentDialog()
         {
           Title = "Hmmm..",
           Content = "We failed to locate your osu! Installation path, please define it manually qwq",
           PrimaryButtonText = "Okay qwq"
         }.ShowAsync();
+      }
+
+    }
+
+    private async Task FetchReleaseStreams()
+    {
+      List<string> releases = await ReleaseStreamUtil.GetAvailableReleaseStreams();
+      foreach(string release in releases)
+      {
+        ReleaseStreamComboBox.Items.Add(release.UppercaseFirst().Trim());
+      }
+
+      string systemRelease = RegistryUtil.GetUsedReleaseStream("Stable");
+
+      bool containsRelease = releases.Contains(systemRelease);
+
+      ReleaseStreamComboBox.SelectedValue = systemRelease;
      
     }
 
@@ -113,17 +143,20 @@ namespace EZPPClient_Installer
         using (WebClient client = new WebClient())
         {
           client.Headers.Add("user-agent", "EZPPClientInstaller");
-          string newVersionString = client.DownloadString("https://new.ez-pp.farm/ezppclient?version");
-          double ver = 0;
+          string newVersionString = await client.DownloadStringTaskAsync("https://new.ez-pp.farm/ezppclient?version");
+          SemVersion newVersion = new SemVersion(9, 9, 9);
+
           try
           {
-            ver = double.Parse(newVersionString, CultureInfo.InvariantCulture);
+            newVersion = SemVersion.Parse(newVersionString);
           }
-          catch (FormatException)
-          {
+          catch (Exception e){
+            ShowErrorDialog(e.Message);
           }
 
-          if (ver > VERSION)
+          int versionsBehind = newVersion.CompareTo(VERSION);
+          
+          if (versionsBehind > 0)
             return UpdateState.UpdateFound;
         }
       }
@@ -188,6 +221,10 @@ namespace EZPPClient_Installer
         return;
       }
 
+      var type = InstallButton.Content;
+
+      RegistryUtil.SetUsedReleaseStream(RELEASESTREAM);
+
       if (!Directory.Exists(osuFolder + "\\EZPPClient"))
       {
         Directory.CreateDirectory(osuFolder + "\\EZPPClient");
@@ -264,7 +301,6 @@ namespace EZPPClient_Installer
         {
           try
           {
-            //File.Copy(string.Format(@"{0}\osu!.{1}.cfg", osuFolder, userName), string.Format(@"{0}\osu!.{1}.cfg", EZPPFolder, userName));
             if (!CreateSymbolicLink(string.Format(@"{0}\osu!.{1}.cfg", EZPPFolder, userName), string.Format(@"{0}\osu!.{1}.cfg", osuFolder, userName), SymbolicLink.File))
             {
               ContentDialog dg = new ContentDialog()
@@ -291,7 +327,6 @@ namespace EZPPClient_Installer
         {
           try
           {
-            //File.Copy(string.Format(@"{0}\scores.db", osuFolder), string.Format(@"{0}\scores.db", EZPPFolder));
             if (!CreateSymbolicLink(string.Format(@"{0}\scores.db", EZPPFolder), string.Format(@"{0}\scores.db", osuFolder), SymbolicLink.File))
             {
               ContentDialog dg = new ContentDialog()
@@ -318,7 +353,6 @@ namespace EZPPClient_Installer
         {
           try
           {
-            //File.Copy(string.Format(@"{0}\collection.db", osuFolder), string.Format(@"{0}\collection.db", EZPPFolder));
             if (!CreateSymbolicLink(string.Format(@"{0}\collection.db", EZPPFolder), string.Format(@"{0}\collection.db", osuFolder), SymbolicLink.File))
             {
               ContentDialog dg = new ContentDialog()
@@ -345,7 +379,6 @@ namespace EZPPClient_Installer
         {
           try
           {
-            //File.Copy(string.Format(@"{0}\osu.db", osuFolder), string.Format(@"{0}\osu.db", EZPPFolder));
             if (!CreateSymbolicLink(string.Format(@"{0}\osu!.db", EZPPFolder), string.Format(@"{0}\osu!.db", osuFolder), SymbolicLink.File))
             {
               ContentDialog dg = new ContentDialog()
@@ -372,7 +405,7 @@ namespace EZPPClient_Installer
 
 
 
-      List<string> filesToDownload = DownloadUtil.FilesToDownload(EZPPFolder, InstallButton.Content.Equals("Reinstall"));
+      List<string> filesToDownload = await DownloadUtil.FilesToDownload(EZPPFolder, InstallButton.Content.Equals("Reinstall"));
 
       Visibility prevInstallBtnVis = InstallButton.Visibility;
       Visibility prevUninstallBtnVis = Uninstall_Button.Visibility;
@@ -382,32 +415,46 @@ namespace EZPPClient_Installer
       InstallButton.Visibility = Visibility.Hidden;
       Uninstall_Button.Visibility = Visibility.Hidden;
       linkFoldersCheckbox.Visibility = Visibility.Hidden;
+      ReleaseStreamComboBox.IsEnabled = false;
 
       Download_Text.Visibility = Visibility.Visible;
       Download_Progressbar.Visibility = Visibility.Visible;
 
       await DownloadUtil.DownloadFiles(filesToDownload, EZPPFolder);
 
-      if (InstallButton.Content.Equals("Install"))
+      if (type.Equals("Install"))
       {
-        IShellLink link = (IShellLink)new ShellLink();
-
-        // setup shortcut information
-        link.SetDescription("Starts the EZPPClient");
-        link.SetPath(EZPPFolder + @"\EZPPClient.exe");
-
-        // save it
-        IPersistFile file = (IPersistFile)link;
         string desktopPath = Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory);
-        string LinkFile = System.IO.Path.Combine(desktopPath, "Start EZPPClient.lnk");
-        Console.Out.WriteLine("Saving Shortcut to " + LinkFile);
-        file.Save(LinkFile, false);
+        string desktopLinkFile = Path.Combine(desktopPath, "Start EZPPClient.lnk");
+
+        string startMenuPath = Environment.GetFolderPath(Environment.SpecialFolder.StartMenu);
+        string startMenuPathPrograms = Path.Combine(startMenuPath, "Programs");
+        string startMenuLinkFile = Path.Combine(startMenuPathPrograms, "Start EZPPClient.lnk");
+
+        if (!File.Exists(desktopLinkFile))
+        {
+          WshShell shell = new WshShell();
+          IWshShortcut shortcut = (IWshShortcut)shell.CreateShortcut(desktopLinkFile);
+          shortcut.Description = $"Starts the EZPPClient";
+          shortcut.TargetPath = Path.Combine(EZPPFolder, "EZPPClient.exe");
+          shortcut.Save();
+        }
+
+        if (!File.Exists(startMenuLinkFile))
+        {
+          WshShell shell = new WshShell();
+          IWshShortcut shortcut = (IWshShortcut)shell.CreateShortcut(startMenuLinkFile);
+          shortcut.Description = $"Starts the EZPPClient";
+          shortcut.TargetPath = Path.Combine(EZPPFolder, "EZPPClient.exe");
+          shortcut.Save();
+        }
       }
 
       InstallButton.Visibility = prevInstallBtnVis;
       Uninstall_Button.Visibility = prevUninstallBtnVis;
       linkFoldersCheckbox.Visibility = prevLinkFCVis;
       BrowseButton.IsEnabled = true;
+      ReleaseStreamComboBox.IsEnabled = true;
 
       Download_Text.Visibility = Visibility.Hidden;
       Download_Progressbar.Visibility = Visibility.Hidden;
@@ -415,7 +462,7 @@ namespace EZPPClient_Installer
       Uninstall_Button.Visibility = Visibility.Visible;
       UpdateInstallButton(false);
       
-      List<string> outdatedFiles = DownloadUtil.FilesToDownload(EZPPFolder, false);
+      List<string> outdatedFiles = await DownloadUtil.FilesToDownload(EZPPFolder, false);
 
       if (!IsEmpty(outdatedFiles))
       {
@@ -424,7 +471,7 @@ namespace EZPPClient_Installer
         linkFoldersCheckbox.IsEnabled = false;
         string updateText = "It seems like the installation was faulty, please hit Update to repair the EZPPClient.";
 
-        switch (InstallButton.Content)
+        switch (type)
         {
           case "Update":
             updateText = "It seems like the update was faulty, please hit Update to repair the EZPPClient.";
@@ -447,7 +494,7 @@ namespace EZPPClient_Installer
       {
         string updateText = "The EZPPClient was successfully installed!";
 
-        switch (InstallButton.Content)
+        switch (type)
         {
           case "Update":
             updateText = "The EZPPClient was successfully updated!";
@@ -509,7 +556,7 @@ namespace EZPPClient_Installer
               UpdateInstallButton(false);
 
               string osuEZPPPath = folderTextbox.Text + @"\EZPPClient";
-              List<string> outdatedFiles = DownloadUtil.FilesToDownload(osuEZPPPath, false);
+              List<string> outdatedFiles = await DownloadUtil.FilesToDownload(osuEZPPPath, false);
 
               if (!IsEmpty(outdatedFiles))
               {
@@ -557,11 +604,18 @@ namespace EZPPClient_Installer
         if (Directory.Exists(osuEZPPPath))
           Directory.Delete(osuEZPPPath, true);
 
+        
         string desktopPath = Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory);
-        string linkFile = System.IO.Path.Combine(desktopPath, "Start EZPPClient.lnk");
+        string linkFile = Path.Combine(desktopPath, "Start EZPPClient.lnk");
         if (File.Exists(linkFile))
           File.Delete(linkFile);
 
+        string startMenuPath = Environment.GetFolderPath(Environment.SpecialFolder.StartMenu);
+        string startMenuPathPrograms = Path.Combine(startMenuPath, "Programs");
+        string startMenuLinkFile = Path.Combine(startMenuPathPrograms, "Start EZPPClient.lnk");
+        if (File.Exists(startMenuLinkFile))
+          File.Delete(startMenuLinkFile);
+
         _ = new ContentDialog()
         {
           Title = "Success!",
@@ -582,7 +636,7 @@ namespace EZPPClient_Installer
 
     private async Task<bool> isValidOsuFolder(string folder)
     {
-      if (string.IsNullOrEmpty(folder) || string.IsNullOrWhiteSpace(folder))
+      if (string.IsNullOrEmpty(folder) || string.IsNullOrWhiteSpace(folder) || !Directory.Exists(folder))
         return false;
       string[] files = Directory.GetFiles(folder, "*");
       string[] subDirs = Directory.GetDirectories(folder, "*");
@@ -634,5 +688,63 @@ namespace EZPPClient_Installer
       Instance.Download_Progressbar.Value = progress;
       Instance.Download_Text.Content = "Downloading: " + file;
     }
+
+    private async void ReleaseStreamComboBox_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
+    {
+
+      bool init = string.IsNullOrEmpty(RELEASESTREAM);
+
+      RELEASESTREAM = (string)ReleaseStreamComboBox.SelectedValue;
+
+      if (init)
+        return;
+
+      ReleaseStreamComboBox.IsEnabled = false;
+      BrowseButton.IsEnabled = false;
+      InstallButton.IsEnabled = false;
+      Uninstall_Button.IsEnabled = false;
+
+      string osuPath = folderTextbox.Text;
+
+      bool isValidFolder = await isValidOsuFolder(osuPath);
+      UpdateInstallButton(!string.IsNullOrEmpty(osuPath));
+
+      if (!string.IsNullOrEmpty(osuPath) && isValidFolder)
+      {
+        bool foundInstall = isEZPPClientInstallationFound(osuPath);
+        if (foundInstall)
+        {
+          string osuEZPPPath = osuPath + @"\EZPPClient";
+
+          Uninstall_Button.Visibility = Visibility.Visible;
+          UpdateInstallButton(false);
+
+
+          List<string> outdatedFiles = await DownloadUtil.FilesToDownload(osuEZPPPath, false);
+
+          if (!IsEmpty(outdatedFiles))
+          {
+            UpdateInstallButton(true);
+            InstallButton.Content = "Update";
+            linkFoldersCheckbox.IsEnabled = false;
+          }
+        }
+
+        folderTextbox.Text = osuPath;
+      }
+
+      _ = new ContentDialog()
+      {
+        Title = "Success!",
+        Content = "ReleaseStream changed to " + RELEASESTREAM,
+        PrimaryButtonText = "Okay"
+      }.ShowAsync();
+
+      ReleaseStreamComboBox.IsEnabled = true;
+      BrowseButton.IsEnabled = true;
+      InstallButton.IsEnabled = true;
+      Uninstall_Button.IsEnabled = true;
+
+    }
   }
 }

EZPPClient Installer/Models/MD5File.cs

@@ -0,0 +1,16 @@
+namespace EZPPClient_Installer
+{
+  class MD5File
+  {
+
+    public string MD5 { get; set; }
+
+    public string Name { get; set; }
+
+    public MD5File(string name, string md5)
+    {
+      this.MD5 = md5;
+      this.Name = name;
+    }
+  }
+}

EZPPClient Installer/Shortcut.cs

@@ -1,39 +0,0 @@
-using System;
-using System.IO;
-using System.Runtime.InteropServices;
-using System.Runtime.InteropServices.ComTypes;
-using System.Text;
-
-namespace Shortcut
-{
-    [ComImport]
-    [Guid("00021401-0000-0000-C000-000000000046")]
-    internal class ShellLink
-    {
-    }
-
-    [ComImport]
-    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
-    [Guid("000214F9-0000-0000-C000-000000000046")]
-    internal interface IShellLink
-    {
-        void GetPath([Out, MarshalAs(UnmanagedType.LPWStr)] StringBuilder pszFile, int cchMaxPath, out IntPtr pfd, int fFlags);
-        void GetIDList(out IntPtr ppidl);
-        void SetIDList(IntPtr pidl);
-        void GetDescription([Out, MarshalAs(UnmanagedType.LPWStr)] StringBuilder pszName, int cchMaxName);
-        void SetDescription([MarshalAs(UnmanagedType.LPWStr)] string pszName);
-        void GetWorkingDirectory([Out, MarshalAs(UnmanagedType.LPWStr)] StringBuilder pszDir, int cchMaxPath);
-        void SetWorkingDirectory([MarshalAs(UnmanagedType.LPWStr)] string pszDir);
-        void GetArguments([Out, MarshalAs(UnmanagedType.LPWStr)] StringBuilder pszArgs, int cchMaxPath);
-        void SetArguments([MarshalAs(UnmanagedType.LPWStr)] string pszArgs);
-        void GetHotkey(out short pwHotkey);
-        void SetHotkey(short wHotkey);
-        void GetShowCmd(out int piShowCmd);
-        void SetShowCmd(int iShowCmd);
-        void GetIconLocation([Out, MarshalAs(UnmanagedType.LPWStr)] StringBuilder pszIconPath, int cchIconPath, out int piIcon);
-        void SetIconLocation([MarshalAs(UnmanagedType.LPWStr)] string pszIconPath, int iIcon);
-        void SetRelativePath([MarshalAs(UnmanagedType.LPWStr)] string pszPathRel, int dwReserved);
-        void Resolve(IntPtr hwnd, int fFlags);
-        void SetPath([MarshalAs(UnmanagedType.LPWStr)] string pszFile);
-    }
-}

EZPPClient Installer/Utils/DownloadUtil.cs

@@ -3,16 +3,14 @@ using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Net;
-using System.Security.Cryptography;
 using System.Threading.Tasks;
-using System.Windows.Forms;
 
 namespace EZPPClient_Installer
 {
   public class DownloadUtil
   {
 
-    public static List<string> FilesToDownload(string pathToEZPP, bool reinstall)
+    public static async Task<List<string>> FilesToDownload(string pathToEZPP, bool reinstall)
     {
       bool directoryExists = Directory.Exists(pathToEZPP);
 
@@ -21,15 +19,14 @@ namespace EZPPClient_Installer
 
       try
       {
-
         using (WebClient wc = new WebClient())
         {
           wc.Headers.Add("user-agent", "EZPPClientInstaller");
-          var data = wc.DownloadString("https://new.ez-pp.farm/ezppclient?list");
+          var data = await wc.DownloadStringTaskAsync("https://new.ez-pp.farm/ezppclient?list&release=" + MainWindow.RELEASESTREAM.ToLower());
           string[] dataList = data.Split('\n');
           foreach (string datastring in dataList)
           {
-            if (string.IsNullOrWhiteSpace(datastring))
+            if (string.IsNullOrWhiteSpace(datastring) || !datastring.Contains("#"))
               continue;
             
             string[] se = datastring.Split('#');
@@ -41,7 +38,7 @@ namespace EZPPClient_Installer
       }
       catch (WebException error)
       {
-        new ContentDialog()
+        _ = new ContentDialog()
         {
           Title = "Oops...",
           Content = "A error occurred while trying to fetch all needed Files.\n" + error.Message,
@@ -55,28 +52,28 @@ namespace EZPPClient_Installer
         MessageBox.Show("Folder does not exist: " + pathToEZPP);
 #endif
         foreach (MD5File md5File in md5Files)
-          downloadList.Add(md5File.getName());
+          downloadList.Add(md5File.Name);
       }
       else
       {
         foreach (MD5File md5file in md5Files)
         {
-          string file = pathToEZPP + @"\" + md5file.getName();
+          string file = pathToEZPP + @"\" + md5file.Name;
           bool doesExistOnPC = File.Exists(file);
           if (!doesExistOnPC)
           {
-            downloadList.Add(md5file.getName());
+            downloadList.Add(md5file.Name);
           }
           else
           {
-            string onlineHash = md5file.getMD5();
+            string onlineHash = md5file.MD5;
             string pcHash = MD5Util.CalculateMD5(file);
 #if DEBUG
-            MessageBox.Show("Filename: " + md5file.getName() + "\nOnline-Hash: " + onlineHash + "\n PC-Hash: " + pcHash);
+            MessageBox.Show("Filename: " + md5file.Name + "\nOnline-Hash: " + onlineHash + "\n PC-Hash: " + pcHash);
 #endif
             if (!string.Equals(onlineHash, pcHash))
             {
-              downloadList.Add(md5file.getName());
+              downloadList.Add(md5file.Name);
             }
           }
         }
@@ -151,7 +148,7 @@ namespace EZPPClient_Installer
 
             MainWindow.updateProgress(filename + " - " + value.ProgressPercentage + "% - " + Math.Round((averageTransferRate / 1024000D) * 1.8, 2) + "MBit/s", value.ProgressPercentage);
           };
-          await wc.DownloadFileTaskAsync(@"https://new.ez-pp.farm/ezppclient?file=" + filename, path + @"\" + filename);
+          await wc.DownloadFileTaskAsync(@"https://new.ez-pp.farm/ezppclient?file=" + filename + "&release=" + MainWindow.RELEASESTREAM.ToLower(), path + @"\" + filename); ;
         }
       }
       catch (WebException)

EZPPClient Installer/Utils/MD5Util.cs

@@ -1,11 +1,6 @@
 using System;
-using System.Collections.Generic;
 using System.IO;
-using System.Linq;
 using System.Security.Cryptography;
-using System.Text;
-using System.Threading.Tasks;
-
 namespace EZPPClient_Installer
 {
   class MD5Util

EZPPClient Installer/Utils/OsuUtil.cs

@@ -1,15 +1,9 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using Path = System.IO.Path;
-using File = System.IO.File;
+using Path = System.IO.Path;
 using Microsoft.Win32;
 
 namespace EZPPClient_Installer
 {
-  class Util
+  class OsuUtil
   {
     public static string osuInstallDir()
     {
@@ -18,10 +12,14 @@ namespace EZPPClient_Installer
       string second_registry_key = @"SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall";
 
       using (Microsoft.Win32.RegistryKey key = Registry.LocalMachine.OpenSubKey(registry_key))
+      {
+        if (key != null && key.GetSubKeyNames() != null)
         {
           foreach (string subkey_name in key.GetSubKeyNames())
           {
             using (RegistryKey subkey = key.OpenSubKey(subkey_name))
+            {
+              if (subkey != null)
               {
                 if ((string)subkey.GetValue("DisplayName") == "osu!")
                 {
@@ -30,14 +28,20 @@ namespace EZPPClient_Installer
               }
             }
           }
+        }
+      }
 
       if (string.IsNullOrEmpty(path))
       {
         using (Microsoft.Win32.RegistryKey key = Registry.LocalMachine.OpenSubKey(second_registry_key))
+        {
+          if (key != null && key.GetSubKeyNames() != null)
           {
             foreach (string subkey_name in key.GetSubKeyNames())
             {
               using (RegistryKey subkey = key.OpenSubKey(subkey_name))
+              {
+                if (subkey != null)
                 {
                   if ((string)subkey.GetValue("DisplayName") == "osu!")
                   {
@@ -47,6 +51,8 @@ namespace EZPPClient_Installer
               }
             }
           }
+        }
+      }
 
       return path;
     }

EZPPClient Installer/Utils/ProcessUtil.cs

@@ -1,10 +1,6 @@
 using System;
-using System.Collections.Generic;
 using System.Diagnostics;
 using System.IO;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace EZPPClient_Installer
 {

EZPPClient Installer/Utils/RegistryUtil.cs

@@ -0,0 +1,37 @@
+using Microsoft.Win32;
+using System;
+
+namespace EZPPClient_Installer.Utils
+{
+  class RegistryUtil
+  {
+
+    public static void SetUsedReleaseStream(string release)
+    {
+      RegistryKey key = Registry.CurrentUser.CreateSubKey(@"SOFTWARE\EZPPClientInstaller");
+      key.SetValue("ReleaseStream", release);
+      key.Close();
+    }
+
+    public static String GetUsedReleaseStream(string defaultRelease)
+    {
+      string release = defaultRelease;
+      RegistryKey key = Registry.CurrentUser.OpenSubKey(@"SOFTWARE\EZPPClientInstaller");
+
+      //if it does exist, retrieve the stored values  
+      if (key != null)
+      {
+        release = (string) key.GetValue("ReleaseStream");
+        key.Close();
+      }
+
+      return release;
+    }
+
+    public static void DeleteUsedReleaseStream()
+    {
+      Registry.CurrentUser.DeleteSubKey(@"SOFTWARE\EZPPClientInstaller");
+    }
+
+  }
+}

EZPPClient Installer/Utils/ReleaseStreamUtil.cs

@@ -0,0 +1,45 @@
+using ModernWpf.Controls;
+using System.Collections.Generic;
+using System.Net;
+using System.Threading.Tasks;
+
+namespace EZPPClient_Installer
+{
+  class ReleaseStreamUtil
+  {
+
+    public static async Task<List<string>> GetAvailableReleaseStreams()
+    {
+
+      List<string> releaseStreamList = new List<string>();
+
+      try
+      {
+        using (WebClient wc = new WebClient())
+        {
+          wc.Headers.Add("user-agent", "EZPPClientInstaller");
+          var data = await wc.DownloadStringTaskAsync("https://new.ez-pp.farm/ezppclient?releases");
+          string[] dataList = data.Split('\n');
+          foreach (string datastring in dataList)
+          {
+            if (string.IsNullOrWhiteSpace(datastring))
+              continue;
+            releaseStreamList.Add(datastring);
+          }
+        }
+      }
+      catch (WebException error)
+      {
+        _ = new ContentDialog()
+        {
+          Title = "Oops...",
+          Content = "A error occurred while trying to fetch the ReleaseStreams.\n" + error.Message,
+          PrimaryButtonText = "Okay"
+        }.ShowAsync();
+      }
+
+      return releaseStreamList;
+    }
+
+  }
+}

LICENSE

@@ -0,0 +1,673 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
+or can get the source code.  And you must show them these terms so they
+know their rights.
+
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+  Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
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+pattern of such abuse occurs in the area of products for individuals to
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+stand ready to extend this provision to those domains in future versions
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+
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+States should not allow patents to restrict development and use of
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+
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+
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+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
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+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
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+  16. Limitation of Liability.
+
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+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
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+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    Copyright (C) 2021 EZPPFarm
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    EZPPClient Installer  Copyright (C) 2021 EZPPFarm
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

README.md

@@ -1 +1,29 @@
-EZPPClient Installer
+# EZPPClient Installer
+
+Welcome to the EZPPClient Installer! A new way to install the customized osu! Client for EZPPFarm.
+
+Just one click and you are ready to go!
+
+## Pictures
+![](https://i.imgur.com/fklNmX8.png)
+![](https://i.imgur.com/TzwUtvP.png)
+
+## Installation
+The Installer is a "plug and play thing", download it and execute!
+
+## Features
+
+* Linking Songs- and Skinfolder
+* Switch between Releases
+* Search automatically for updates
+* Reinstall/Uninstall Client
+
+## Used Libraries
+
+* [Costura.Fody](https://github.com/Fody/Costura)
+* [DK.Standard](https://www.nuget.org/packages/DK.Standard/4.137.4070.201115155/)
+* [ModernWpfUI](https://github.com/Kinnara/ModernWpf)
+* [Semver](https://github.com/maxhauser/semver)
+
+## License
+[GPL-3.0](https://choosealicense.com/licenses/gpl-3.0/)