Fix texture stuff

Zennysoft.Game.Godot.Implementation/Save/SaveFileManager.cs

@@ -0,0 +1,70 @@
+using Chickensoft.Collections;
+using Chickensoft.Serialization.Godot;
+using Chickensoft.Serialization;
+using Godot;
+using System.IO.Abstractions;
+using System.Text.Json;
+using System.Text.Json.Serialization.Metadata;
+using Zennysoft.Game.Abstractions;
+
+namespace Zennysoft.Game.Implementation;
+
+public class SaveFileManager<T> : ISaveFileManager<T>
+{
+  private readonly IFileSystem _fileSystem;
+  private readonly JsonSerializerOptions _jsonOptions;
+  private string _defaultSaveLocation;
+  public const string DEFAULT_SAVE_FILE_NAME = "game.json";
+
+  public SaveFileManager(IFileSystem fileSystem)
+  {
+    _fileSystem = fileSystem;
+    _defaultSaveLocation = _fileSystem.Path.Join(OS.GetUserDataDir(), DEFAULT_SAVE_FILE_NAME);
+
+    GodotSerialization.Setup();
+    Serializer.AddConverter(new Texture2DConverter());
+
+    var upgradeDependencies = new Blackboard();
+
+    _jsonOptions = new JsonSerializerOptions
+    {
+      Converters = {
+        new SerializableTypeConverter(upgradeDependencies)
+      },
+      WriteIndented = true
+    };
+  }
+
+
+  public Task<T?> ReadFromFile(params IJsonTypeInfoResolver?[] resolvers)
+  {
+    if (!_fileSystem.File.Exists(_defaultSaveLocation))
+      throw new FileNotFoundException();
+    return ReadFromFile(_defaultSaveLocation, resolvers);
+  }
+
+  public async Task<T?> ReadFromFile(string filePath, params IJsonTypeInfoResolver?[] resolvers)
+  {
+    if (!_fileSystem.File.Exists(filePath))
+      throw new FileNotFoundException();
+
+    var json = await _fileSystem.File.ReadAllTextAsync(filePath);
+
+    var resolver = new SerializableTypeResolver();
+    _jsonOptions.TypeInfoResolver = JsonTypeInfoResolver.Combine([resolver, .. resolvers]);
+    return JsonSerializer.Deserialize<T?>(json, _jsonOptions);
+  }
+
+  public Task WriteToFile(T gameData, params IJsonTypeInfoResolver?[] resolvers)
+  {
+    return WriteToFile(gameData, _defaultSaveLocation, resolvers);
+  }
+
+  public async Task WriteToFile(T gameData, string filePath, params IJsonTypeInfoResolver?[] resolvers)
+  {
+    var resolver = new SerializableTypeResolver();
+    _jsonOptions.TypeInfoResolver = JsonTypeInfoResolver.Combine([resolver, .. resolvers]);
+    var json = JsonSerializer.Serialize(gameData, _jsonOptions);
+    await _fileSystem.File.WriteAllTextAsync(filePath, json);
+  }
+}

Zennysoft.Game.Godot.Implementation/Save/Texture2DConverter.cs

@@ -0,0 +1,66 @@
+using Godot;
+using System.Text.Json.Serialization;
+
+using System.Text.Json;
+
+/// <summary>Basis JSON converter.</summary>
+public class Texture2DConverter : JsonConverter<Texture2D>
+{
+  /// <inheritdoc />
+  public override bool CanConvert(Type typeToConvert) =>
+    typeToConvert == typeof(Texture2D);
+
+  /// <inheritdoc />
+  public override Texture2D Read(
+    ref Utf8JsonReader reader,
+    Type typeToConvert,
+    JsonSerializerOptions options)
+  {
+    var texture2D = new Texture2D();
+
+    while (reader.Read())
+    {
+      if (reader.TokenType == JsonTokenType.EndObject)
+      {
+        return texture2D;
+      }
+
+      if (reader.TokenType != JsonTokenType.PropertyName)
+      {
+        continue;
+      }
+
+      var propertyName = reader.GetString();
+      reader.Read();
+
+      switch (propertyName)
+      {
+        case "resource_path":
+          var resourcePath = JsonSerializer.Deserialize<string>(ref reader, options);
+          texture2D = GD.Load<Texture2D>(resourcePath);
+          break;
+        default:
+          break;
+      }
+    }
+
+    throw new JsonException("Unexpected end when reading Texture2D.");
+
+  }
+
+  /// <inheritdoc />
+  public override void Write(
+    Utf8JsonWriter writer,
+    Texture2D value,
+    JsonSerializerOptions options
+  )
+  {
+    var resolver = options.TypeInfoResolver;
+    var resourcePathType = resolver!.GetTypeInfo(typeof(string), options)!;
+
+    writer.WriteStartObject();
+    writer.WritePropertyName("resource_path");
+    JsonSerializer.Serialize(writer, value.ResourcePath, resourcePathType);
+    writer.WriteEndObject();
+  }
+}