Reorder + analyzer cleanup

11 files changed, 843 insertions, 0 deletions

diff --git a/lib/Plugins/LICENSE.txt b/lib/Plugins/LICENSE.txt
new file mode 100644
index 0000000..2848520
--- /dev/null
+++ b/lib/Plugins/LICENSE.txt
@@ -0,0 +1,346 @@
+The software in this repository is licensed under the GNU GPL version 2.0 (or any later version). 
+
+SPDX-License-Identifier: GPL-2.0-or-later
+    
+License-Text:
+
+GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
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+
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+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    VNLib.Hashing.Portable is a compact .NET managed cryptographic operation
+    utilities library.
+    Copyright (C) 2022 Vaughn Nugent
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
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+    You should have received a copy of the GNU General Public License along
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+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.
\ No newline at end of file
diff --git a/lib/Plugins/README.md b/lib/Plugins/README.md
new file mode 100644
index 0000000..c08107a
--- /dev/null
+++ b/lib/Plugins/README.md
@@ -0,0 +1,81 @@
+# VNLib.Plugins
+
+A compact and simple contract interface and supporting types for runtime loadable plugins. It implements types that may be used outside the scope of **VNLib.Plugins.Essentials** library, but the contract types were designed for use with it, which is why they are opinionated. 
+
+**This library has no internal or external dependencies**
+
+### Usage with VNLib.Plugins.Essentials.
+
+The **VNLib.Plugins.Essentials** library discovers IEndpoint types at runtime inside `EventProcessor` types. For correct usage with the `EventProcessor` class you should implement the interface `IVirtualEndpoint<HttpEntity>` otherwise your endpoint will not get loaded.
+
+All plugins that intend to be loaded with the **VNLib.Plugins.Essentials.ServiceStack** application library, should conform to these signatures. The ServiceStack library also implements the additional lifecycle hooks if you choose to implement them.
+
+## Breakdown
+
+The `IPlugin` interface: a simple contract
+``` programming language C#
+   //Should be public and concrete for runtime loading
+   public sealed class MyPlugin : IPluign
+   {
+      private readonly LinkedList<IEndpoint> _endpoints;
+
+      public MyPlugin()
+      {
+          _endpoints = new LinkedList<IEndpoint>();
+     }
+
+     public string PluginName { get; } = "MyPlugin";
+	  
+     public void Load()
+     {
+        //Load plugin, build endpoints
+	IEndpoint ep1 = new MyEndpoint();
+	IEndpoint ep2 = new MyEndpoint();
+	//Add endpoints
+	_endpoints.AddLast(ep1);
+	_endpoints.AddLast(ep2);
+     }
+	
+     public void Unload()
+     {
+	//Unload resources
+     }
+	
+     public IEnumerable<IEndpoint> GetEndpoints()
+     {
+          //Return the endpoints for this plugin
+	  return _endpoints;
+     }
+     
+     ... Additional lifecycle methods using the Attributes namespace
+  }
+```
+
+The `IEndpoint` interface: represents a resource location in a url search path
+``` programming language C#
+   //Should be public and concrete
+   internal class MyEndpoint : IEndpoint
+   {
+      public string Path { get; } = "/my/resource";
+   }
+```
+
+A step farther is the `IVirtualEndpoint<TEntity>` which processes an entity of the specified type, and implements the IEndpoint interface:
+_This interface was built for usage with the `IHttpEvent` interface as the entity type._
+```
+   //Should be public and concrete
+   internal class MyVirtualEndpoint : IVirtualEndpoint<IHttpEvent>
+   {
+      public string Path { get; } = "/my/resource";
+	  
+      //process HTTP connection
+      public ValutTask<VfReturnType> Process(IHttpEvent entity)
+      {
+         //Process the entity
+         return VfReturnType.ProcessAsFile;
+      }
+   }
+```
+## License 
+The software in this repository is licensed under the GNU GPL version 2.0 (or any later version).
+See the LICENSE files for more information.
\ No newline at end of file
diff --git a/lib/Plugins/src/Attributes/ConfigurationInitalizerAttribute.cs b/lib/Plugins/src/Attributes/ConfigurationInitalizerAttribute.cs
new file mode 100644
index 0000000..f214d2b
--- /dev/null
+++ b/lib/Plugins/src/Attributes/ConfigurationInitalizerAttribute.cs
@@ -0,0 +1,47 @@
+/*
+* Copyright (c) 2022 Vaughn Nugent
+* 
+* Library: VNLib
+* Package: VNLib.Plugins
+* File: ConfigurationInitalizerAttribute.cs 
+*
+* ConfigurationInitalizerAttribute.cs is part of VNLib.Plugins which is part of the larger 
+* VNLib collection of libraries and utilities.
+*
+* VNLib.Plugins is free software: you can redistribute it and/or modify 
+* it under the terms of the GNU General Public License as published
+* by the Free Software Foundation, either version 2 of the License,
+* or (at your option) any later version.
+*
+* VNLib.Plugins is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 
+* General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License 
+* along with VNLib.Plugins. If not, see http://www.gnu.org/licenses/.
+*/
+
+using System;
+using System.Text.Json;
+
+namespace VNLib.Plugins.Attributes
+{
+    /// <summary>
+    /// Set this attribute on an <see cref="IPlugin"/> instance method to define the configuration initializer.
+    /// This attribute can only be defined on a single instance method and cannot be overloaded.
+    /// <br></br>
+    /// A plugin host should invoke this method before <see cref="IPlugin.Load"/>
+    /// <br></br>
+    /// Method signature <code>public void [methodname] (<see cref="JsonDocument"/> config)</code> 
+    /// </summary>
+    [AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = true)]
+    public sealed class ConfigurationInitalizerAttribute : Attribute
+    { }
+
+    /// <summary>
+    /// Represents a safe configuration initializer delegate method
+    /// </summary>
+    /// <param name="config">The configuration object that plugin will use</param>
+    public delegate void ConfigInitializer(JsonDocument config);
+}
diff --git a/lib/Plugins/src/Attributes/ConsoleEventHandler.cs b/lib/Plugins/src/Attributes/ConsoleEventHandler.cs
new file mode 100644
index 0000000..ece6e28
--- /dev/null
+++ b/lib/Plugins/src/Attributes/ConsoleEventHandler.cs
@@ -0,0 +1,47 @@
+/*
+* Copyright (c) 2022 Vaughn Nugent
+* 
+* Library: VNLib
+* Package: VNLib.Plugins
+* File: ConsoleEventHandler.cs 
+*
+* ConsoleEventHandler.cs is part of VNLib.Plugins which is part of the larger 
+* VNLib collection of libraries and utilities.
+*
+* VNLib.Plugins is free software: you can redistribute it and/or modify 
+* it under the terms of the GNU General Public License as published
+* by the Free Software Foundation, either version 2 of the License,
+* or (at your option) any later version.
+*
+* VNLib.Plugins is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 
+* General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License 
+* along with VNLib.Plugins. If not, see http://www.gnu.org/licenses/.
+*/
+
+using System;
+
+namespace VNLib.Plugins.Attributes
+{
+    /// <summary>
+    /// <para>
+    /// Set this attribute on an <see cref="IPlugin"/> instance method to define the console message event handler
+    /// This attribute can only be defined on a single instance method and cannot be overloaded.
+    /// </para>
+    /// <para>
+    /// Method signature <code>public void [methodname] (<see cref="string"/> command)</code> 
+    /// </para>
+    /// </summary>
+    [AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = true)]
+    public sealed class ConsoleEventHandlerAttribute : Attribute
+    {}
+
+    /// <summary>
+    /// Represents a safe console event delegate method
+    /// </summary>
+    /// <param name="command">The command to be passed to the plugin</param>
+    public delegate void ConsoleEventHandlerSignature(string command);
+}
diff --git a/lib/Plugins/src/Attributes/LogInitializerAttribute.cs b/lib/Plugins/src/Attributes/LogInitializerAttribute.cs
new file mode 100644
index 0000000..61264fb
--- /dev/null
+++ b/lib/Plugins/src/Attributes/LogInitializerAttribute.cs
@@ -0,0 +1,46 @@
+/*
+* Copyright (c) 2022 Vaughn Nugent
+* 
+* Library: VNLib
+* Package: VNLib.Plugins
+* File: LogInitializerAttribute.cs 
+*
+* LogInitializerAttribute.cs is part of VNLib.Plugins which is part of the larger 
+* VNLib collection of libraries and utilities.
+*
+* VNLib.Plugins is free software: you can redistribute it and/or modify 
+* it under the terms of the GNU General Public License as published
+* by the Free Software Foundation, either version 2 of the License,
+* or (at your option) any later version.
+*
+* VNLib.Plugins is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 
+* General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License 
+* along with VNLib.Plugins. If not, see http://www.gnu.org/licenses/.
+*/
+
+using System;
+
+namespace VNLib.Plugins.Attributes
+{
+    /// <summary>
+    /// Set this attribute on an <see cref="IPlugin"/> instance method to define the log initalizer.
+    /// This attribute can only be defined on a single instance method and cannot be overloaded.
+    /// <br></br>
+    /// A plugin host should invoke this method before <see cref="IPlugin.Load"/> but after a <see cref="ConfigurationInitalizerAttribute"/> method
+    /// <br></br>
+    /// Method signature <code>public void [methodname] (<see cref="string"/>[] cmdArgs)</code> 
+    /// </summary>
+    [AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = true)]
+    public sealed class LogInitializerAttribute : Attribute
+    { }
+
+    /// <summary>
+    /// Represents a safe logger initializer delegate method
+    /// </summary>
+    /// <param name="args">The arguments to pass to the log iniializer (usually command line args)</param>
+    public delegate void LogInitializer(string[] args);
+}
diff --git a/lib/Plugins/src/IEndpoint.cs b/lib/Plugins/src/IEndpoint.cs
new file mode 100644
index 0000000..33d49df
--- /dev/null
+++ b/lib/Plugins/src/IEndpoint.cs
@@ -0,0 +1,37 @@
+/*
+* Copyright (c) 2022 Vaughn Nugent
+* 
+* Library: VNLib
+* Package: VNLib.Plugins
+* File: IEndpoint.cs 
+*
+* IEndpoint.cs is part of VNLib.Plugins which is part of the larger 
+* VNLib collection of libraries and utilities.
+*
+* VNLib.Plugins is free software: you can redistribute it and/or modify 
+* it under the terms of the GNU General Public License as published
+* by the Free Software Foundation, either version 2 of the License,
+* or (at your option) any later version.
+*
+* VNLib.Plugins is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 
+* General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License 
+* along with VNLib.Plugins. If not, see http://www.gnu.org/licenses/.
+*/
+
+namespace VNLib.Plugins
+{
+    /// <summary>
+    /// A base class for all entity processing endpoints to listen for requests
+    /// </summary>
+    public interface IEndpoint
+    {
+        /// <summary>
+        /// The location path for which to match this handler
+        /// </summary>
+        public string Path { get; }
+    }
+}
\ No newline at end of file
diff --git a/lib/Plugins/src/IPlugin.cs b/lib/Plugins/src/IPlugin.cs
new file mode 100644
index 0000000..16bd403
--- /dev/null
+++ b/lib/Plugins/src/IPlugin.cs
@@ -0,0 +1,53 @@
+/*
+* Copyright (c) 2022 Vaughn Nugent
+* 
+* Library: VNLib
+* Package: VNLib.Plugins
+* File: IPlugin.cs 
+*
+* IPlugin.cs is part of VNLib.Plugins which is part of the larger 
+* VNLib collection of libraries and utilities.
+*
+* VNLib.Plugins is free software: you can redistribute it and/or modify 
+* it under the terms of the GNU General Public License as published
+* by the Free Software Foundation, either version 2 of the License,
+* or (at your option) any later version.
+*
+* VNLib.Plugins is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 
+* General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License 
+* along with VNLib.Plugins. If not, see http://www.gnu.org/licenses/.
+*/
+
+using System;
+using System.Collections.Generic;
+
+namespace VNLib.Plugins
+{
+    /// <summary>
+    /// Allows for applications to define plugin capabilities
+    /// </summary>
+    public interface IPlugin
+    {
+        /// <summary>
+        /// The name of the plugin to referrence (may be used by the host to interact)
+        /// </summary>
+        string PluginName { get; }
+        /// <summary>
+        /// Performs operations to prepare the plugin for use
+        /// </summary>
+        void Load();
+        /// <summary>
+        /// Invoked when the plugin is unloaded from the runtime
+        /// </summary>
+        void Unload();
+        /// <summary>
+        /// Returns all endpoints within the plugin to load into the current root
+        /// </summary>
+        /// <returns>An enumeration of endpoints to load</returns>
+        IEnumerable<IEndpoint> GetEndpoints();
+    }
+}
\ No newline at end of file
diff --git a/lib/Plugins/src/IVirtualEndpoint.cs b/lib/Plugins/src/IVirtualEndpoint.cs
new file mode 100644
index 0000000..5f33c0f
--- /dev/null
+++ b/lib/Plugins/src/IVirtualEndpoint.cs
@@ -0,0 +1,43 @@
+/*
+* Copyright (c) 2022 Vaughn Nugent
+* 
+* Library: VNLib
+* Package: VNLib.Plugins
+* File: IVirtualEndpoint.cs 
+*
+* IVirtualEndpoint.cs is part of VNLib.Plugins which is part of the larger 
+* VNLib collection of libraries and utilities.
+*
+* VNLib.Plugins is free software: you can redistribute it and/or modify 
+* it under the terms of the GNU General Public License as published
+* by the Free Software Foundation, either version 2 of the License,
+* or (at your option) any later version.
+*
+* VNLib.Plugins is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 
+* General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License 
+* along with VNLib.Plugins. If not, see http://www.gnu.org/licenses/.
+*/
+
+using System.Threading.Tasks;
+
+namespace VNLib.Plugins
+{
+
+    /// <summary>
+    /// Represents a virtual page which provides processing on an entity
+    /// </summary>
+    /// <typeparam name="TEntity">The entity type to process</typeparam>
+    public interface IVirtualEndpoint<TEntity> : IEndpoint
+    {
+        /// <summary>
+        /// The handler method for processing the specified location.
+        /// </summary>
+        /// <param name="entity">The current connection/session </param>
+        /// <returns>A <see cref="VfReturnType"/> specifying how the caller should continue processing the request</returns>
+        public ValueTask<VfReturnType> Process(TEntity entity);
+    }
+}
\ No newline at end of file
diff --git a/lib/Plugins/src/VNLib.Plugins.csproj b/lib/Plugins/src/VNLib.Plugins.csproj
new file mode 100644
index 0000000..76d292f
--- /dev/null
+++ b/lib/Plugins/src/VNLib.Plugins.csproj
@@ -0,0 +1,35 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <RootNamespace>VNLib.Plugins</RootNamespace>    
+    <Authors>Vaughn Nugent</Authors>
+    <Company>$(Authors)</Company>
+    <Product>VNLib Plugins Interface Assembly</Product>
+    <Description>Provides a standard interface for building dynamically loadable 
+plugins and asynchronus web endpoint processing, compatible 
+with the VNLib.Plugins.Runtime loader library.</Description>
+    <PackageProjectUrl>https://www.vaughnnugent.com/resources</PackageProjectUrl>
+    <Version>1.0.1.3</Version>
+    <Copyright>Copyright © 2022 Vaughn Nugent</Copyright>
+    <AssemblyName>VNLib.Plugins</AssemblyName>
+    <PackageTags>Plugins, VNLIb, VNLib Plugins, Plugin Base</PackageTags>
+    <Nullable>enable</Nullable>
+    <GenerateDocumentationFile>True</GenerateDocumentationFile>
+    <AnalysisLevel>latest-all</AnalysisLevel>
+    <SignAssembly>True</SignAssembly>
+    <AssemblyOriginatorKeyFile>\\vaughnnugent.com\Internal\Folder Redirection\vman\Documents\Programming\Software\StrongNameingKey.snk</AssemblyOriginatorKeyFile>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="ErrorProne.NET.CoreAnalyzers" Version="0.1.2">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="ErrorProne.NET.Structs" Version="0.1.2">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+  </ItemGroup>
+
+</Project>
diff --git a/lib/Plugins/src/VfReturnType.cs b/lib/Plugins/src/VfReturnType.cs
new file mode 100644
index 0000000..8ebcb26
--- /dev/null
+++ b/lib/Plugins/src/VfReturnType.cs
@@ -0,0 +1,61 @@
+/*
+* Copyright (c) 2022 Vaughn Nugent
+* 
+* Library: VNLib
+* Package: VNLib.Plugins
+* File: Interfaces.cs 
+*
+* Interfaces.cs is part of VNLib.Plugins which is part of the larger 
+* VNLib collection of libraries and utilities.
+*
+* VNLib.Plugins is free software: you can redistribute it and/or modify 
+* it under the terms of the GNU General Public License as published
+* by the Free Software Foundation, either version 2 of the License,
+* or (at your option) any later version.
+*
+* VNLib.Plugins is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 
+* General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License 
+* along with VNLib.Plugins. If not, see http://www.gnu.org/licenses/.
+*/
+
+namespace VNLib.Plugins
+{
+
+    /// <summary>
+    /// Represents the result of a virutal endpoint processing operation
+    /// </summary>
+    public enum VfReturnType
+    {
+        /// <summary>
+        /// Signals that the virtual endpoint 
+        /// </summary>
+        ProcessAsFile, 
+        /// <summary>
+        /// Signals that the virtual endpoint generated a response, and 
+        /// the connection should be completed
+        /// </summary>
+        VirtualSkip, 
+        /// <summary>
+        /// Signals that the virtual endpoint determined that the connection 
+        /// should be denied.
+        /// </summary>
+        Forbidden, 
+        /// <summary>
+        /// Signals that the resource the virtual endpoint was processing 
+        /// does not exist.
+        /// </summary>
+        NotFound, 
+        /// <summary>
+        /// Signals that the virutal endpoint determined the request was invalid
+        /// </summary>
+        BadRequest, 
+        /// <summary>
+        /// Signals that the virtual endpoint had an error
+        /// </summary>
+        Error
+    }
+}
diff --git a/lib/Plugins/src/WebMessage.cs b/lib/Plugins/src/WebMessage.cs
new file mode 100644
index 0000000..fb6ca6f
--- /dev/null
+++ b/lib/Plugins/src/WebMessage.cs
@@ -0,0 +1,47 @@
+/*
+* Copyright (c) 2022 Vaughn Nugent
+* 
+* Library: VNLib
+* Package: VNLib.Plugins
+* File: WebMessage.cs 
+*
+* WebMessage.cs is part of VNLib.Plugins which is part of the larger 
+* VNLib collection of libraries and utilities.
+*
+* VNLib.Plugins is free software: you can redistribute it and/or modify 
+* it under the terms of the GNU General Public License as published
+* by the Free Software Foundation, either version 2 of the License,
+* or (at your option) any later version.
+*
+* VNLib.Plugins is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 
+* General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License 
+* along with VNLib.Plugins. If not, see http://www.gnu.org/licenses/.
+*/
+
+using System.Text.Json.Serialization;
+
+namespace VNLib.Plugins
+{
+    public class WebMessage
+    {
+        /// <summary>
+        /// The encrypted access token for the client to use after a login request
+        /// </summary>
+        [JsonPropertyName("token")]
+        public string? Token { get; set; }
+        /// <summary>
+        /// The result of the REST operation to send to client
+        /// </summary>
+        [JsonPropertyName("result")]
+        public object? Result { get; set; }
+        /// <summary>
+        /// A status flag/result of the REST operation
+        /// </summary>
+        [JsonPropertyName("success")]
+        public bool Success { get; set; }
+    }
+}