renaming

MarcerGameDvdLauncher/FavoritesService.cs

@@ -0,0 +1,91 @@
+namespace MarcerGameDvdLauncher
+{
+    // Manages loading, saving and querying favorite ZIP paths.
+    public class FavoritesService
+    {
+        private readonly string _filePath;
+        // Use a SortedSet so favorites are kept in sorted order in memory.
+        private SortedSet<string> _favorites = new(StringComparer.OrdinalIgnoreCase);
+
+        public FavoritesService(string filePath)
+        {
+            _filePath = filePath ?? throw new ArgumentNullException(nameof(filePath));
+        }
+
+        // Load favorites from disk (no-op if file missing)
+        public void Load()
+        {
+            _favorites = new SortedSet<string>(StringComparer.OrdinalIgnoreCase);
+            if (!File.Exists(_filePath)) return;
+            var lines = File.ReadAllLines(_filePath, System.Text.Encoding.UTF8);
+            foreach (var l in lines)
+            {
+                var t = l?.Trim();
+                if (string.IsNullOrEmpty(t)) continue;
+                try
+                {
+                    var full = Path.GetFullPath(t);
+                    _favorites.Add(full);
+                }
+                catch
+                {
+                    // ignore invalid paths in the file
+                }
+            }
+        }
+
+        public bool IsFavorite(string path)
+        {
+            if (string.IsNullOrWhiteSpace(path)) return false;
+            try
+            {
+                var full = Path.GetFullPath(path);
+                return _favorites.Contains(full);
+            }
+            catch
+            {
+                return false;
+            }
+        }
+
+        // Returns true if any favorites are present
+        public bool HasFavorites() => _favorites.Count > 0;
+
+        // Returns all favorites as absolute paths in sorted order
+        public IReadOnlyList<string> GetAll() => _favorites.ToList();
+
+        // Toggle favorite state. Returns true if added, false if removed.
+        public bool Toggle(string path)
+        {
+            if (string.IsNullOrWhiteSpace(path)) throw new ArgumentNullException(nameof(path));
+            var full = Path.GetFullPath(path);
+            bool added;
+            if (_favorites.Contains(full))
+            {
+                _favorites.Remove(full);
+                added = false;
+            }
+            else
+            {
+                _favorites.Add(full);
+                added = true;
+            }
+            Save();
+            return added;
+        }
+
+        private void Save()
+        {
+            try
+            {
+                var dir = Path.GetDirectoryName(_filePath) ?? AppContext.BaseDirectory;
+                if (!Directory.Exists(dir)) Directory.CreateDirectory(dir);
+                File.WriteAllLines(_filePath, _favorites.OrderBy(x => x), System.Text.Encoding.UTF8);
+            }
+            catch
+            {
+                // Let callers surface errors (we swallow here to avoid throwing on write failures during UI operations)
+            }
+        }
+    }
+}