feature: update expression browser and add plugin expression extensions

2025-01-16 12:36:01 +11:00
parent 963970feeb
commit a3e1e1d030
23 changed files with 652 additions and 555 deletions
@@ -0,0 +1,40 @@
+using Spring.Core.TypeResolution;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+
+namespace Disco.Services.Plugins.Features.ExpressionExtensionProvider
+{
+    [PluginFeatureCategory(DisplayName = "Expression Extension")]
+    public abstract class ExpressionExtensionProviderFeature : PluginFeature
+    {
+        private static readonly Dictionary<string, ExpressionExtensionRegistration> registrations = new Dictionary<string, ExpressionExtensionRegistration>(StringComparer.OrdinalIgnoreCase);
+        private static readonly Dictionary<string, Assembly> pluginAssemblies = new Dictionary<string, Assembly>(StringComparer.OrdinalIgnoreCase);
+
+        public void RegisterExpressionExtension(string alias, Type extensionType)
+        {
+            if (!extensionType.IsClass || !extensionType.IsAbstract || !extensionType.IsSealed)
+                throw new ArgumentException("Expression Extension Types must be a static class", nameof(extensionType));
+
+            lock (registrations)
+            {
+                registrations.Add(alias, new ExpressionExtensionRegistration(Manifest, alias, extensionType));
+                var assemblyName = extensionType.Assembly.FullName.Substring(0, extensionType.Assembly.FullName.IndexOf(','));
+                pluginAssemblies[assemblyName] = extensionType.Assembly;
+                TypeRegistry.RegisterType(alias, extensionType);
+            }
+        }
+
+        public static List<ExpressionExtensionRegistration> GetExpressionExtensionRegistrations()
+        {
+            lock (registrations)
+            {
+                return registrations.Values.ToList();
+            }
+        }
+
+        public static bool TryGetExtensionAssembly(string assemblyName, out Assembly assembly)
+            => pluginAssemblies.TryGetValue(assemblyName, out assembly);
+    }
+}