feat: implement Blacklist

Blacklist/MU3.User/patch_UserManager.cs

@@ -0,0 +1,28 @@
+using MU3.DataStudio;
+
+namespace MU3.User;
+class patch_UserManager: UserManager {
+    private bool _loadedBlacklistData = false;
+    private int _blacklistMin = -1;
+    private int _blacklistMax = -1;
+    public extern UserFumen orig_getUserFumen(int musicId, FumenDifficulty difficulty, bool create);
+    public new UserFumen getUserFumen(int musicId, FumenDifficulty difficulty, bool create) {
+        if(!_loadedBlacklistData) {
+            loadBlacklistData();
+        }
+        if(musicId >= _blacklistMin && musicId <= _blacklistMax) {
+            return null;
+        } else {
+            return orig_getUserFumen(musicId, difficulty, create);
+        }
+    }
+
+    private void loadBlacklistData() {
+        using IniFile iniFile = new("mu3.ini");
+
+        _blacklistMin = iniFile.getIntValue("Extra", "BlacklistMin", 10000);
+        _blacklistMax = iniFile.getIntValue("Extra", "BlacklistMax", 19999);
+
+        _loadedBlacklistData = true;
+    }
+}