baseline: OpenMU upstream b5a0961 (fresh source)

src/Interfaces/IConfigurationChangePublisher.cs

@@ -0,0 +1,63 @@
+// <copyright file="IConfigurationChangePublisher.cs" company="MUnique">
+// Licensed under the MIT License. See LICENSE file in the project root for full license information.
+// </copyright>
+
+namespace MUnique.OpenMU.Interfaces;
+
+/// <summary>
+/// Interface for an object which publishes configuration changes to other services.
+/// </summary>
+public interface IConfigurationChangePublisher
+{
+    /// <summary>
+    /// Gets a publisher which doesn't publish at all.
+    /// </summary>
+    static IConfigurationChangePublisher None { get; } = new NoneConfigurationChangePublisher();
+
+    /// <summary>
+    /// A configuration has changed.
+    /// </summary>
+    /// <param name="type">The type.</param>
+    /// <param name="id">The identifier.</param>
+    /// <param name="configuration">The changed configuration.</param>
+    Task ConfigurationChangedAsync(Type type, Guid id, object configuration);
+
+    /// <summary>
+    /// A configuration has been added.
+    /// </summary>
+    /// <param name="type">The type.</param>
+    /// <param name="id">The identifier.</param>
+    /// <param name="configuration">The added configuration.</param>
+    Task ConfigurationAddedAsync(Type type, Guid id, object configuration);
+
+    /// <summary>
+    /// A configuration has been removed.
+    /// </summary>
+    /// <param name="type">The type.</param>
+    /// <param name="id">The identifier.</param>
+    Task ConfigurationRemovedAsync(Type type, Guid id);
+
+    /// <summary>
+    /// A publisher which doesn't publish changes at all.
+    /// </summary>
+    private class NoneConfigurationChangePublisher : IConfigurationChangePublisher
+    {
+        /// <inheritdoc />
+        public Task ConfigurationChangedAsync(Type type, Guid id, object configuration)
+        {
+            return Task.CompletedTask;
+        }
+
+        /// <inheritdoc />
+        public Task ConfigurationAddedAsync(Type type, Guid id, object configuration)
+        {
+            return Task.CompletedTask;
+        }
+
+        /// <inheritdoc />
+        public Task ConfigurationRemovedAsync(Type type, Guid id)
+        {
+            return Task.CompletedTask;
+        }
+    }
+}