Added preview feature configuration (#227)

app/MindWork AI Studio/Settings/ConfigurationSelectData.cs

@@ -88,6 +88,12 @@ public static class ConfigurationSelectDataFactory
         yield return new("Show also experimental features: these are experimental; expect bugs, missing features, many changes", PreviewVisibility.EXPERIMENTAL);
     }
     
+    public static IEnumerable<ConfigurationSelectData<PreviewFeatures>> GetPreviewFeaturesData(SettingsManager settingsManager)
+    {
+        foreach (var source in settingsManager.ConfigurationData.App.PreviewVisibility.GetPreviewFeatures())
+            yield return new(source.GetPreviewDescription(), source);
+    }
+    
     public static IEnumerable<ConfigurationSelectData<NavBehavior>> GetNavBehaviorData()
     {
         yield return new("Navigation expands on mouse hover", NavBehavior.EXPAND_ON_HOVER);

app/MindWork AI Studio/Settings/DataModel/DataApp.cs

@@ -32,6 +32,11 @@ public sealed class DataApp
     /// The visibility setting for previews features.
     /// </summary>
     public PreviewVisibility PreviewVisibility { get; set; } = PreviewVisibility.NONE;
+
+    /// <summary>
+    /// The enabled preview features.
+    /// </summary>
+    public HashSet<PreviewFeatures> EnabledPreviewFeatures { get; set; } = new();
     
     /// <summary>
     /// Should we preselect a provider for the entire app?

app/MindWork AI Studio/Settings/DataModel/PreviewFeatureExtensions.cs

@@ -0,0 +1,14 @@
+namespace AIStudio.Settings.DataModel;
+
+public static class PreviewFeatureExtensions
+{
+    public static string GetPreviewDescription(this PreviewFeatures feature) => feature switch
+    {
+        PreviewFeatures.PRE_WRITER_MODE_2024 => "Writer Mode: Experiments about how to write long texts using AI",
+        PreviewFeatures.PRE_RAG_2024 => "RAG: Preview of our RAG implementation where you can refer your files or integrate enterprise data within your company",
+        
+        _ => "Unknown preview feature"
+    };
+    
+    public static bool IsEnabled(this PreviewFeatures feature, SettingsManager settingsManager) => settingsManager.ConfigurationData.App.EnabledPreviewFeatures.Contains(feature);
+}

app/MindWork AI Studio/Settings/DataModel/PreviewFeatures.cs

@@ -0,0 +1,11 @@
+namespace AIStudio.Settings.DataModel;
+
+public enum PreviewFeatures
+{
+    //
+    // Important: Never delete any enum value from this list.
+    // We must be able to deserialize old settings files that may contain these values.
+    //
+    PRE_WRITER_MODE_2024,
+    PRE_RAG_2024,
+}

app/MindWork AI Studio/Settings/DataModel/PreviewVisibilityExtensions.cs

@@ -0,0 +1,45 @@
+namespace AIStudio.Settings.DataModel;
+
+public static class PreviewVisibilityExtensions
+{
+    public static IList<PreviewFeatures> GetPreviewFeatures(this PreviewVisibility visibility)
+    {
+        var features = new List<PreviewFeatures>();
+        if (visibility >= PreviewVisibility.RELEASE_CANDIDATE)
+        {
+        }
+        
+        if (visibility >= PreviewVisibility.BETA)
+        {
+        }
+        
+        if (visibility >= PreviewVisibility.ALPHA)
+        {
+        }
+        
+        if (visibility >= PreviewVisibility.PROTOTYPE)
+        {
+            features.Add(PreviewFeatures.PRE_RAG_2024);
+        }
+        
+        if (visibility >= PreviewVisibility.EXPERIMENTAL)
+        {
+            features.Add(PreviewFeatures.PRE_WRITER_MODE_2024);
+        }
+        
+        return features;
+    }
+    
+    public static HashSet<PreviewFeatures> FilterPreviewFeatures(this PreviewVisibility visibility, HashSet<PreviewFeatures> enabledFeatures)
+    {
+        var filteredFeatures = new HashSet<PreviewFeatures>();
+        var previewFeatures = visibility.GetPreviewFeatures();
+        foreach (var feature in enabledFeatures)
+        {
+            if (previewFeatures.Contains(feature))
+                filteredFeatures.Add(feature);
+        }
+        
+        return filteredFeatures;
+    }
+}

app/MindWork AI Studio/Settings/SettingsManager.cs

@@ -84,6 +84,14 @@ public sealed class SettingsManager(ILogger<SettingsManager> logger)
             }
                 
             this.ConfigurationData = SettingsMigrations.Migrate(this.logger, settingsVersion, await File.ReadAllTextAsync(settingsPath), JSON_OPTIONS);
+            
+            //
+            // We filter the enabled preview features based on the preview visibility.
+            // This is necessary when the app starts up: some preview features may have
+            // been disabled or released from the last time the app was started.
+            //
+            this.ConfigurationData.App.EnabledPreviewFeatures = this.ConfigurationData.App.PreviewVisibility.FilterPreviewFeatures(this.ConfigurationData.App.EnabledPreviewFeatures);
+
             return;
         }