Added small system overview

Moonlight.Api/Helpers/OsHelper.cs

@@ -0,0 +1,98 @@
+using System.Runtime.InteropServices;
+
+namespace Moonlight.Api.Helpers;
+
+public class OsHelper
+{
+    public static string GetName()
+    {
+        if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+            return GetWindowsVersion();
+
+        if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
+            return GetLinuxVersion();
+
+        if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
+            return "Goofy OS";
+
+        return "Unknown OS";
+    }
+
+    private static string GetWindowsVersion()
+    {
+        var version = Environment.OSVersion.Version;
+
+        // Windows 11 is version 10.0 build 22000+
+        if (version.Major == 10 && version.Build >= 22000)
+            return $"Windows 11 ({version.Build})";
+
+        if (version.Major == 10)
+            return $"Windows 10 ({version.Build})";
+
+        if (version.Major == 6 && version.Minor == 3)
+            return "Windows 8.1";
+
+        if (version.Major == 6 && version.Minor == 2)
+            return "Windows 8";
+
+        if (version.Major == 6 && version.Minor == 1)
+            return "Windows 7";
+
+        return $"Windows {version.Major}.{version.Minor}";
+    }
+
+    private static string GetLinuxVersion()
+    {
+        try
+        {
+            // Read /etc/os-release, should work everywhere
+            if (File.Exists("/etc/os-release"))
+            {
+                var lines = File.ReadAllLines("/etc/os-release");
+                string? name = null;
+                string? version = null;
+
+                foreach (var line in lines)
+                {
+                    if (line.StartsWith("NAME="))
+                        name = line.Substring(5).Trim('"');
+                    else if (line.StartsWith("VERSION_ID="))
+                        version = line.Substring(11).Trim('"');
+                }
+
+                if (!string.IsNullOrEmpty(name))
+                {
+                    return string.IsNullOrEmpty(version) ? name : $"{name} {version}";
+                }
+            }
+
+            //If for some weird reason it still uses lsb release
+            if (File.Exists("/etc/lsb-release"))
+            {
+                var lines = File.ReadAllLines("/etc/lsb-release");
+                string? name = null;
+                string? version = null;
+
+                foreach (var line in lines)
+                {
+                    if (line.StartsWith("DISTRIB_ID="))
+                        name = line.Substring(11);
+                    else if (line.StartsWith("DISTRIB_RELEASE="))
+                        version = line.Substring(16);
+                }
+
+                if (!string.IsNullOrEmpty(name))
+                {
+                    return string.IsNullOrEmpty(version) ? name : $"{name} {version}";
+                }
+            }
+        }
+        catch
+        {
+            // Ignore
+        }
+
+        // Fallback
+        return $"Linux {Environment.OSVersion.Version}";
+    }
+}