Restructure solution layout by module

src/Notify/StellaOps.Notify.WebService/Plugins/NotifyPluginRegistry.cs

@@ -0,0 +1,55 @@
+using System;
+using System.Threading;
+using Microsoft.Extensions.Logging;
+using StellaOps.Plugin.Hosting;
+
+namespace StellaOps.Notify.WebService.Plugins;
+
+internal interface INotifyPluginRegistry
+{
+    Task<int> WarmupAsync(CancellationToken cancellationToken = default);
+}
+
+internal sealed class NotifyPluginRegistry : INotifyPluginRegistry
+{
+    private readonly PluginHostOptions _hostOptions;
+    private readonly ILogger<NotifyPluginRegistry> _logger;
+
+    public NotifyPluginRegistry(
+        PluginHostOptions hostOptions,
+        ILogger<NotifyPluginRegistry> logger)
+    {
+        _hostOptions = hostOptions ?? throw new ArgumentNullException(nameof(hostOptions));
+        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+    }
+
+    public Task<int> WarmupAsync(CancellationToken cancellationToken = default)
+    {
+        cancellationToken.ThrowIfCancellationRequested();
+
+        var result = PluginHost.LoadPlugins(_hostOptions, _logger);
+
+        if (result.Plugins.Count == 0)
+        {
+            _logger.LogWarning(
+                "No Notify plug-ins discovered under '{PluginDirectory}'.",
+                result.PluginDirectory);
+        }
+        else
+        {
+            _logger.LogInformation(
+                "Loaded {PluginCount} Notify plug-in(s) from '{PluginDirectory}'.",
+                result.Plugins.Count,
+                result.PluginDirectory);
+        }
+
+        if (result.MissingOrderedPlugins.Count > 0)
+        {
+            _logger.LogWarning(
+                "Configured plug-ins missing from disk: {Missing}.",
+                string.Join(", ", result.MissingOrderedPlugins));
+        }
+
+        return Task.FromResult(result.Plugins.Count);
+    }
+}