WIP: Update IAsyncStorageBackend.cs and MnemonicDBStorageBackend.cs to accept key scopes

Author: Al12rs

src/NexusMods.Backend/Settings/MnemonicDBStorageBackend.cs

@@ -52,17 +52,18 @@ public MnemonicDBStorageBackend(IServiceProvider serviceProvider)
         }
     }
 
-    private static string GetId<T>() where T : ISettings
+    private static string GetId<T>(string? key) where T : ISettings
     {
-        return typeof(T).FullName ?? typeof(T).Name;
+        var typeName = typeof(T).FullName ?? typeof(T).Name;
+        return string.IsNullOrWhiteSpace(key) ? typeName : $"{typeName}|{key}";
     }
 
-    public async ValueTask Save<T>(T value, CancellationToken cancellationToken) where T : class, ISettings, new()
+    public async ValueTask Save<T>(T value, string? key, CancellationToken cancellationToken) where T : class, ISettings, new()
     {
         var db = _conn.Value.Db;
         using var tx = _conn.Value.BeginTransaction();
 
-        var name = GetId<T>();
+        var name = GetId<T>(key);
 
         EntityId id;
         var settings = Setting.FindByName(db, name).ToArray();
@@ -80,9 +81,9 @@ private static string GetId<T>() where T : ISettings
         await tx.Commit();
     }
 
-    public ValueTask<T?> Load<T>(CancellationToken cancellationToken) where T : class, ISettings, new()
+    public ValueTask<T?> Load<T>(string? key, CancellationToken cancellationToken) where T : class, ISettings, new()
     {
-        var settings = Setting.FindByName(_conn.Value.Db, GetId<T>()).ToArray();
+        var settings = Setting.FindByName(_conn.Value.Db, GetId<T>(key)).ToArray();
         if (settings.Length == 0) return ValueTask.FromResult<T?>(null);
         return ValueTask.FromResult(Deserialize<T>(settings.First().Value));
     }

src/NexusMods.Sdk/Settings/Backend/IAsyncStorageBackend.cs

@@ -12,7 +12,7 @@ public interface IAsyncStorageBackend : IBaseStorageBackend, IAsyncDisposable
     /// <summary>
     /// Saves the given settings object to the storage backend asynchronously.
     /// </summary>
-    ValueTask Save<T>(T value, CancellationToken cancellationToken) where T : class, ISettings, new();
+    ValueTask Save<T>(T value, string? key, CancellationToken cancellationToken) where T : class, ISettings, new();
 
     /// <summary>
     /// Loads the given settings type from the storage backend asynchronously.
@@ -21,5 +21,5 @@ public interface IAsyncStorageBackend : IBaseStorageBackend, IAsyncDisposable
     /// Either the loaded value or <c>null</c> if the loading failed
     /// or the storage backend doesn't contain this value.
     /// </returns>
-    ValueTask<T?> Load<T>(CancellationToken cancellationToken) where T : class, ISettings, new();
+    ValueTask<T?> Load<T>(string? key, CancellationToken cancellationToken) where T : class, ISettings, new();
 }