Updater

Mlaumcherb.Client.Avalonia/сеть/Update/Gitea.cs

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+using System.Linq;
+
+namespace Mlaumcherb.Client.Avalonia.сеть.Update;
+
+public class Release
+{
+    [JsonRequired] public int id { get; set; }
+    [JsonRequired] public string tag_name { get; set; } = "";
+    [JsonRequired] public DateTime created_at { get; set; }
+    // ReSharper disable once CollectionNeverUpdated.Global
+    public List<Asset> assets { get; set; } = new();
+    
+    public class Asset
+    {
+        [JsonRequired] public int id { get; set; }
+        [JsonRequired] public string name { get; set; } = "";
+        [JsonRequired] public int size { get; set; }
+        [JsonRequired] public DateTime created_at { get; set; }
+        [JsonRequired] public string browser_download_url { get; set; } = "";
+
+        public async Task Download(IOPath localPath)
+        {
+            await NetworkHelper.DownloadFile(browser_download_url, localPath);
+        }
+    }
+
+    public Asset? FindAssetByName(string name) => 
+        assets.FirstOrDefault(a => a.name == name);
+}
+
+public class GiteaClient(string ServerUrl)
+{
+    public async Task<Release> GetLatestRelease(string user, string repo)
+    {
+        string url = $"{ServerUrl}//api/v1/repos/{user}/{repo}/releases/latest";
+        return await NetworkHelper.DownloadStringAndDeserialize<Release>(url);
+    }
+}

Mlaumcherb.Client.Avalonia/сеть/Update/UpdateHelper.cs

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+using System.Diagnostics;
+using System.Reflection;
+
+namespace Mlaumcherb.Client.Avalonia.сеть.Update;
+
+public class UpdateHelper
+{
+    private readonly string _executableName = "млаумчерб.exe";
+    private readonly IOPath executablePathActual;
+    private readonly IOPath executablePathOld;
+    private readonly IOPath executablePathNew;
+
+    
+    public class GiteaConfig
+    {
+        [JsonRequired] public required string serverUrl { get; set; }
+        [JsonRequired] public required string user { get; set; }
+        [JsonRequired] public required string repo { get; set; }
+    }
+    
+    private GiteaConfig _giteaConfig;
+    
+    public UpdateHelper(GiteaConfig giteaConfig)
+    {
+        _giteaConfig = giteaConfig;
+        executablePathActual = _executableName;
+        executablePathOld = _executableName + ".old";
+        executablePathNew = _executableName + ".new";
+        Gitea = new GiteaClient(giteaConfig.serverUrl);
+    }
+
+    public GiteaClient Gitea { get; }
+
+    public void DeleteBackupFiles()
+    {
+        if(File.Exists(executablePathOld))
+            File.Delete(executablePathOld);
+    }
+    
+    public async Task<bool> IsUpdateAvailable()
+    {
+        var latest = await Gitea.GetLatestRelease(_giteaConfig.user, _giteaConfig.repo);
+        if (!Version.TryParse(latest.tag_name, out var latestVersion))
+            throw new Exception($"Can't parse version of latest release: {latest.tag_name}");
+
+        Version? currentVersion = Assembly.GetExecutingAssembly().GetName().Version;
+        if(currentVersion is null)
+            throw new Exception($"Can't get current version from {Assembly.GetExecutingAssembly().GetName()}");
+
+        return currentVersion < latestVersion;
+    }
+
+    public async Task UpdateSelf()
+    {
+        if(File.Exists(executablePathNew))
+            File.Delete(executablePathNew);
+        
+        var latest = await Gitea.GetLatestRelease(_giteaConfig.user, _giteaConfig.repo);
+        var asset = latest.FindAssetByName(_executableName);
+        if(asset == null)
+            throw new Exception($"Can't find updated executable on gitea: {_executableName}");
+        await asset.Download(executablePathNew);
+        
+        File.Move(executablePathActual, executablePathOld, true);
+        File.Move(executablePathNew, executablePathActual, true);
+    }
+
+    public void RestartSelf()
+    {
+        Process.Start(executablePathActual.ToString());
+        Thread.Sleep(500);
+        Environment.Exit(0);
+    }
+}