MikuSB.Updater

Common/Util/BuildVersion.cs

@@ -0,0 +1,49 @@
+using System.Reflection;
+
+namespace MikuSB.Util;
+
+public static class BuildVersion
+{
+    public static string Current
+    {
+        get
+        {
+            var assembly = Assembly.GetEntryAssembly() ?? typeof(BuildVersion).Assembly;
+            var value = assembly.GetCustomAttribute<AssemblyInformationalVersionAttribute>()?.InformationalVersion;
+            return string.IsNullOrWhiteSpace(value) ? "0.0.0" : Normalize(value);
+        }
+    }
+
+    public static string Normalize(string? value)
+    {
+        if (string.IsNullOrWhiteSpace(value))
+            return "0.0.0";
+
+        var trimmed = value.Trim();
+        if (trimmed.StartsWith("v", StringComparison.OrdinalIgnoreCase))
+            trimmed = trimmed[1..];
+
+        var separatorIndex = trimmed.IndexOfAny(['-', '+']);
+        return separatorIndex >= 0 ? trimmed[..separatorIndex] : trimmed;
+    }
+
+    public static bool IsNewer(string candidate, string current)
+    {
+        return ToComparableVersion(candidate) > ToComparableVersion(current);
+    }
+
+    private static Version ToComparableVersion(string? value)
+    {
+        var normalized = Normalize(value);
+        var parts = normalized.Split('.', StringSplitOptions.RemoveEmptyEntries);
+        var padded = new int[4];
+
+        for (var i = 0; i < padded.Length; i++)
+        {
+            if (i < parts.Length && int.TryParse(parts[i], out var parsed))
+                padded[i] = parsed;
+        }
+
+        return new Version(padded[0], padded[1], padded[2], padded[3]);
+    }
+}