Restructure solution layout by module

src/Scanner/StellaOps.Scanner.WebService/Hosting/ScannerPluginHostFactory.cs

@@ -0,0 +1,55 @@
+using System;
+using System.IO;
+using StellaOps.Plugin.Hosting;
+using StellaOps.Scanner.WebService.Options;
+
+namespace StellaOps.Scanner.WebService.Hosting;
+
+internal static class ScannerPluginHostFactory
+{
+    public static PluginHostOptions Build(ScannerWebServiceOptions options, string contentRootPath)
+    {
+        ArgumentNullException.ThrowIfNull(options);
+        ArgumentNullException.ThrowIfNull(contentRootPath);
+
+        var baseDirectory = options.Plugins.BaseDirectory;
+        if (string.IsNullOrWhiteSpace(baseDirectory))
+        {
+            baseDirectory = Path.Combine(contentRootPath, "..");
+        }
+        else if (!Path.IsPathRooted(baseDirectory))
+        {
+            baseDirectory = Path.GetFullPath(Path.Combine(contentRootPath, baseDirectory));
+        }
+
+        var pluginsDirectory = options.Plugins.Directory;
+        if (string.IsNullOrWhiteSpace(pluginsDirectory))
+        {
+            pluginsDirectory = Path.Combine("plugins", "scanner");
+        }
+
+        if (!Path.IsPathRooted(pluginsDirectory))
+        {
+            pluginsDirectory = Path.Combine(baseDirectory, pluginsDirectory);
+        }
+
+        var hostOptions = new PluginHostOptions
+        {
+            BaseDirectory = baseDirectory,
+            PluginsDirectory = pluginsDirectory,
+            PrimaryPrefix = "StellaOps.Scanner"
+        };
+
+        foreach (var additionalPrefix in options.Plugins.OrderedPlugins)
+        {
+            hostOptions.PluginOrder.Add(additionalPrefix);
+        }
+
+        foreach (var pattern in options.Plugins.SearchPatterns)
+        {
+            hostOptions.SearchPatterns.Add(pattern);
+        }
+
+        return hostOptions;
+    }
+}