Adding providers can now be disabled using config plugins (#522)

Co-authored-by: Thorsten Sommer <mail@tsommer.org>

app/MindWork AI Studio/Settings/ConfigMeta.cs

@@ -0,0 +1,88 @@
+using System.Linq.Expressions;
+
+using AIStudio.Settings.DataModel;
+
+namespace AIStudio.Settings;
+
+/// <summary>
+/// Represents configuration metadata for a specific class and property.
+/// </summary>
+/// <typeparam name="TClass">The class type that contains the configuration property.</typeparam>
+/// <typeparam name="TValue">The type of the configuration property value.</typeparam>
+public record ConfigMeta<TClass, TValue> : ConfigMetaBase
+{
+    public ConfigMeta(Expression<Func<Data, TClass>> configSelection, Expression<Func<TClass, TValue>> propertyExpression)
+    {
+        this.ConfigSelection = configSelection;
+        this.PropertyExpression = propertyExpression;
+    }
+
+    /// <summary>
+    /// The expression to select the configuration class from the settings data.
+    /// </summary>
+    private Expression<Func<Data, TClass>> ConfigSelection { get; }
+
+    /// <summary>
+    /// The expression to select the property within the configuration class.
+    /// </summary>
+    private Expression<Func<TClass, TValue>> PropertyExpression { get; }
+	
+    /// <summary>
+    /// Indicates whether the configuration is managed by a plugin and is therefore locked.
+    /// </summary>
+    public bool IsLocked { get; private set; }
+
+    /// <summary>
+    /// The ID of the plugin that manages this configuration. This is set when the configuration is locked.
+    /// </summary>
+    public Guid MangedByConfigPluginId { get; private set; }
+    
+    /// <summary>
+    /// The default value for the configuration property. This is used when resetting the property to its default state.
+    /// </summary>
+    public required TValue Default { get; init; }
+
+    /// <summary>
+    /// Locks the configuration state, indicating that it is managed by a specific plugin.
+    /// </summary>
+    /// <param name="pluginId">The ID of the plugin that is managing this configuration.</param>
+    public void LockManagedState(Guid pluginId)
+    {
+        this.IsLocked = true;
+        this.MangedByConfigPluginId = pluginId;
+    }
+    
+    /// <summary>
+    /// Resets the managed state of the configuration, allowing it to be modified again.
+    /// This will also reset the property to its default value.
+    /// </summary>
+    public void ResetManagedState()
+    {
+        this.IsLocked = false;
+        this.MangedByConfigPluginId = Guid.Empty;
+        this.Reset();
+    }
+    
+    /// <summary>
+    /// Resets the configuration property to its default value.
+    /// </summary>
+    public void Reset()
+    {
+        var configInstance = this.ConfigSelection.Compile().Invoke(SETTINGS_MANAGER.ConfigurationData);
+        var memberExpression = this.PropertyExpression.GetMemberExpression();
+        if (memberExpression.Member is System.Reflection.PropertyInfo propertyInfo)
+            propertyInfo.SetValue(configInstance, this.Default);
+    }
+    
+    /// <summary>
+    /// Sets the value of the configuration property to the specified value.
+    /// </summary>
+    /// <param name="value">The value to set for the configuration property.</param>
+    public void SetValue(TValue value)
+    {
+        var configInstance = this.ConfigSelection.Compile().Invoke(SETTINGS_MANAGER.ConfigurationData);
+        var memberExpression = this.PropertyExpression.GetMemberExpression();
+        if (memberExpression.Member is System.Reflection.PropertyInfo propertyInfo)
+            propertyInfo.SetValue(configInstance, value);
+    }
+}