feat: Add metro transit, gadgets, shop, social apps, and traffic models checkpoint

Ananta.Server/Ananta.Handlers/Game/VehicleTuningStore.cs

@@ -0,0 +1,86 @@
+using System.Text.Json;
+using Ananta.Server.Configuration;
+using Ananta.Server.Protocol.Client4229938;
+
+namespace Ananta.Server.Handlers.Game;
+
+/// <summary>
+/// Persists per-player vehicle tuning (bought parts / suits / session unlocks) to
+/// save/vehicles/&lt;pid&gt;.json so purchases survive a server restart.
+/// </summary>
+internal static class VehicleTuningStore
+{
+    private static string DirFor(ulong pid)
+    {
+        string baseDir;
+        try { baseDir = PrivateServerConfigStore.ProjectRoot; }
+        catch { baseDir = AppContext.BaseDirectory; }
+        return Path.Combine(baseDir, "save", "vehicles");
+    }
+
+    private static string FileFor(ulong pid) => Path.Combine(DirFor(pid), $"{pid}.json");
+
+    public static void Save(ulong pid, WorldEntryState world)
+    {
+        try
+        {
+            var dir = DirFor(pid);
+            Directory.CreateDirectory(dir);
+            var dto = new TuningDto
+            {
+                Unlocked = world.SessionUnlockedVehicleConfigs.ToList(),
+                Parts = world.VehiclePartsByConfig.ToDictionary(
+                    kv => kv.Key,
+                    kv => kv.Value.Select(p => new PartDto { Type = p.Type, PartId = p.PartId }).ToList()),
+                Suits = new Dictionary<uint, uint>(world.VehicleSuitByConfig),
+            };
+            var json = JsonSerializer.Serialize(dto, new JsonSerializerOptions { WriteIndented = true });
+            File.WriteAllText(FileFor(pid), json);
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine($"[TUNING] save failed pid={pid}: {ex.Message}");
+        }
+    }
+
+    /// <summary>Loads saved tuning into the (fresh) world state — called on world entry.</summary>
+    public static void LoadInto(ulong pid, WorldEntryState world)
+    {
+        try
+        {
+            var path = FileFor(pid);
+            if (!File.Exists(path))
+                return;
+            var dto = JsonSerializer.Deserialize<TuningDto>(File.ReadAllText(path));
+            if (dto is null)
+                return;
+            lock (world.SyncRoot)
+            {
+                foreach (var id in dto.Unlocked)
+                    world.SessionUnlockedVehicleConfigs.Add(id);
+                foreach (var kv in dto.Parts)
+                    world.VehiclePartsByConfig[kv.Key] = kv.Value.Select(p => (p.Type, p.PartId)).ToList();
+                foreach (var kv in dto.Suits)
+                    world.VehicleSuitByConfig[kv.Key] = kv.Value;
+            }
+            Console.WriteLine($"[TUNING] loaded saved tuning pid={pid} vehicles={dto.Unlocked.Count} parts={dto.Parts.Count}");
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine($"[TUNING] load failed pid={pid}: {ex.Message}");
+        }
+    }
+
+    private sealed class TuningDto
+    {
+        public List<uint> Unlocked { get; set; } = [];
+        public Dictionary<uint, List<PartDto>> Parts { get; set; } = [];
+        public Dictionary<uint, uint> Suits { get; set; } = [];
+    }
+
+    private sealed class PartDto
+    {
+        public uint Type { get; set; }
+        public uint PartId { get; set; }
+    }
+}