Add Avalonia server-host launcher (MVP scaffold)

Cross-platform C# GUI to replace the Qt/C++ Host GUI, on the same dotnet toolchain as the server. MVP: load/save commonwealth-server.json, Start/Stop the CommonwealthOnline.Server process (published exe, then dll, then source run), and stream its output to a live log. Themed to the Commonwealth Online brand (near-black + amber). Builds clean on net8.0. Next: player list + kick/ban via the admin port, then retire the Qt host.
2026-08-16 18:15:40 -04:00
parent 6861fa4276
commit 1f01e68794
11 changed files with 431 additions and 0 deletions
@@ -0,0 +1,106 @@
+using System;
+using System.Diagnostics;
+using System.IO;
+
+namespace CommonwealthOnline.Host.Services;
+
+// Launches the CommonwealthOnline.Server process, preferring a published
+// apphost, then a framework-dependent DLL, then a source-tree dotnet run.
+public sealed class ServerController
+{
+    private Process? _process;
+
+    public bool IsRunning => _process is { HasExited: false };
+
+    public event Action<string>? LogReceived;
+    public event Action<bool>? RunningChanged;
+
+    public void Start(string serverDir, string configPath)
+    {
+        if (IsRunning)
+        {
+            return;
+        }
+
+        var startInfo = ResolveLaunch(serverDir, configPath);
+        var process = new Process { StartInfo = startInfo, EnableRaisingEvents = true };
+        process.OutputDataReceived += (_, e) => Emit(e.Data);
+        process.ErrorDataReceived += (_, e) => Emit(e.Data);
+        process.Exited += (_, _) => RunningChanged?.Invoke(false);
+
+        _process = process;
+        process.Start();
+        process.BeginOutputReadLine();
+        process.BeginErrorReadLine();
+        RunningChanged?.Invoke(true);
+    }
+
+    public void Stop()
+    {
+        if (_process is { HasExited: false } process)
+        {
+            try
+            {
+                process.Kill(entireProcessTree: true);
+            }
+            catch (Exception)
+            {
+                // Process already gone or not killable; RunningChanged fires on Exited.
+            }
+        }
+    }
+
+    private void Emit(string? line)
+    {
+        if (!string.IsNullOrEmpty(line))
+        {
+            LogReceived?.Invoke(line);
+        }
+    }
+
+    private static ProcessStartInfo ResolveLaunch(string serverDir, string configPath)
+    {
+        var exeName = OperatingSystem.IsWindows()
+            ? "CommonwealthOnline.Server.exe"
+            : "CommonwealthOnline.Server";
+        var apphost = Path.Combine(serverDir, exeName);
+        var dll = Path.Combine(serverDir, "CommonwealthOnline.Server.dll");
+        var project = Path.Combine(serverDir, "CommonwealthOnline.Server.csproj");
+
+        var info = new ProcessStartInfo
+        {
+            WorkingDirectory = serverDir,
+            RedirectStandardOutput = true,
+            RedirectStandardError = true,
+            UseShellExecute = false,
+            CreateNoWindow = true,
+        };
+
+        if (File.Exists(apphost))
+        {
+            info.FileName = apphost;
+            info.ArgumentList.Add("serve");
+        }
+        else if (File.Exists(dll))
+        {
+            info.FileName = "dotnet";
+            info.ArgumentList.Add(dll);
+            info.ArgumentList.Add("serve");
+        }
+        else
+        {
+            info.FileName = "dotnet";
+            info.ArgumentList.Add("run");
+            info.ArgumentList.Add("--project");
+            info.ArgumentList.Add(project);
+            info.ArgumentList.Add("-c");
+            info.ArgumentList.Add("Release");
+            info.ArgumentList.Add("--");
+            info.ArgumentList.Add("serve");
+        }
+
+        info.ArgumentList.Add("--config");
+        info.ArgumentList.Add(configPath);
+        return info;
+    }
+}