Update AssetDatabase

Ghost.Editor.Core/AssetHandle/AssetMeta.cs

@@ -1,16 +1,85 @@
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
 namespace Ghost.Editor.Core.AssetHandle;
 
+/// <summary>
+/// Metadata for an asset, stored in .gmeta files.
+/// Contains GUID, version, tags, and importer settings.
+/// FileHash and Dependencies are stored in the database only, not in .gmeta files.
+/// </summary>
 internal class AssetMeta
 {
+    /// <summary>
+    /// Unique identifier for the asset.
+    /// </summary>
+    [JsonPropertyName("Guid")]
     public Guid Guid
     {
         get;
         set;
     }
 
-    public ImporterSettings? Settings
+    /// <summary>
+    /// Version of the asset pipeline (not the asset itself).
+    /// Used for migration when the asset pipeline is redesigned.
+    /// </summary>
+    [JsonPropertyName("Version")]
+    public int Version
     {
         get;
         set;
+    } = 1;
+
+    /// <summary>
+    /// Tags for categorizing and searching assets.
+    /// </summary>
+    [JsonPropertyName("Tags")]
+    public List<string> Tags
+    {
+        get;
+        set;
+    } = new();
+
+    /// <summary>
+    /// Importer settings specific to this asset.
+    /// The key is the importer type name, and the value is a JSON element containing the settings.
+    /// Use GetImporterSettings&lt;T&gt;() and SetImporterSettings&lt;T&gt;() to work with strongly-typed settings.
+    /// </summary>
+    [JsonPropertyName("ImporterSettings")]
+    public Dictionary<string, JsonElement> ImporterSettings
+    {
+        get;
+        set;
+    } = new();
+
+    /// <summary>
+    /// Get importer settings of a specific type.
+    /// </summary>
+    public T? GetImporterSettings<T>(string importerName) where T : ImporterSettings
+    {
+        if (ImporterSettings.TryGetValue(importerName, out var element))
+        {
+            return element.Deserialize<T>();
+        }
+        return null;
+    }
+
+    /// <summary>
+    /// Set importer settings.
+    /// </summary>
+    public void SetImporterSettings<T>(string importerName, T settings) where T : ImporterSettings
+    {
+        var element = JsonSerializer.SerializeToElement(settings);
+        ImporterSettings[importerName] = element;
+    }
+
+    /// <summary>
+    /// Set importer settings (non-generic overload).
+    /// </summary>
+    internal void SetImporterSettings(string importerName, ImporterSettings settings)
+    {
+        var element = JsonSerializer.SerializeToElement(settings, settings.GetType());
+        ImporterSettings[importerName] = element;
     }
 }