From 56f70ea9e23ca886b40f1aa026431786e5d4e799 Mon Sep 17 00:00:00 2001
From: Sipke Schoorstra <sipkeschoorstra@outlook.com>
Date: Mon, 20 Dec 2021 16:33:07 +0100
Subject: [PATCH] Add server features API

Closes #2588
---
 .../elsa-workflows-studio/src/components.d.ts |  2 +
 .../elsa-studio-root/elsa-studio-root.tsx     |  6 ++
 .../elsa-designer-tree/elsa-designer-tree.tsx |  1 -
 ...elsa-workflow-definition-editor-screen.tsx | 73 ++++++++++++-------
 .../src/data/dashboard.tsx                    |  4 +-
 .../src/data/workflow-editor.tsx              |  4 +-
 .../src/models/services.ts                    |  1 +
 .../src/services/elsa-client.ts               | 17 +++++
 .../Extensions/ServiceCollectionExtensions.cs |  3 +-
 .../WorkflowTestingServerFeatureProvider.cs   | 11 +++
 .../Elsa.Samples.Server.Host/Startup.cs       |  6 +-
 .../Endpoints/Features/List.cs                | 57 +++++++++++++++
 .../Services/IServerFeatureProvider.cs        | 10 +++
 13 files changed, 160 insertions(+), 35 deletions(-)
 create mode 100644 src/modules/workflowtesting/Elsa.WorkflowTesting.Api/Services/WorkflowTestingServerFeatureProvider.cs
 create mode 100644 src/server/Elsa.Server.Api/Endpoints/Features/List.cs
 create mode 100644 src/server/Elsa.Server.Api/Services/IServerFeatureProvider.cs

diff --git a/src/designer/elsa-workflows-studio/src/components.d.ts b/src/designer/elsa-workflows-studio/src/components.d.ts
index a59e4ba7f..d0f71320a 100644
--- a/src/designer/elsa-workflows-studio/src/components.d.ts
+++ b/src/designer/elsa-workflows-studio/src/components.d.ts
@@ -290,6 +290,7 @@ export namespace Components {
         "history": RouterHistory;
         "importWorkflow": (file: File) => Promise<void>;
         "monacoLibPath": string;
+        "serverFeatures": Array<string>;
         "serverUrl": string;
         "workflowDefinitionId": string;
     }
@@ -1055,6 +1056,7 @@ declare namespace LocalJSX {
         "history"?: RouterHistory;
         "monacoLibPath"?: string;
         "onWorkflowSaved"?: (event: CustomEvent<WorkflowDefinition>) => void;
+        "serverFeatures"?: Array<string>;
         "serverUrl"?: string;
         "workflowDefinitionId"?: string;
     }
diff --git a/src/designer/elsa-workflows-studio/src/components/dashboard/pages/elsa-studio-root/elsa-studio-root.tsx b/src/designer/elsa-workflows-studio/src/components/dashboard/pages/elsa-studio-root/elsa-studio-root.tsx
index f7b4d11ed..6ec80fe31 100644
--- a/src/designer/elsa-workflows-studio/src/components/dashboard/pages/elsa-studio-root/elsa-studio-root.tsx
+++ b/src/designer/elsa-workflows-studio/src/components/dashboard/pages/elsa-studio-root/elsa-studio-root.tsx
@@ -68,10 +68,13 @@ export class ElsaStudioRoot {
     const elsaClientFactory: () => Promise<ElsaClient> = () => createElsaClient(this.serverUrl);
     const httpClientFactory: () => Promise<AxiosInstance> = () => createHttpClient(this.serverUrl);
 
+    const elsaClient = await elsaClientFactory();
+
     const elsaStudio: ElsaStudio = this.elsaStudio = {
       serverUrl: this.serverUrl,
       basePath: this.basePath,
       featuresString: this.featuresString,
+      serverFeatures: [],
       eventBus,
       pluginManager,
       propertyDisplayManager,
@@ -88,6 +91,8 @@ export class ElsaStudioRoot {
     await eventBus.emit(EventTypes.Root.Initializing);
     pluginManager.initialize(elsaStudio);
     propertyDisplayManager.initialize(elsaStudio);
+
+    elsaStudio.serverFeatures = await elsaClient.featuresApi.list();
   }
 
   async componentDidLoad() {
@@ -107,6 +112,7 @@ export class ElsaStudioRoot {
     const tunnelState: DashboardState = {
       serverUrl: this.serverUrl,
       basePath: this.basePath,
+      serverFeatures: this.elsaStudio.serverFeatures,
       culture,
       monacoLibPath: this.monacoLibPath
     };
diff --git a/src/designer/elsa-workflows-studio/src/components/designers/tree/elsa-designer-tree/elsa-designer-tree.tsx b/src/designer/elsa-workflows-studio/src/components/designers/tree/elsa-designer-tree/elsa-designer-tree.tsx
index a15638a38..43cbcbbe0 100644
--- a/src/designer/elsa-workflows-studio/src/components/designers/tree/elsa-designer-tree/elsa-designer-tree.tsx
+++ b/src/designer/elsa-workflows-studio/src/components/designers/tree/elsa-designer-tree/elsa-designer-tree.tsx
@@ -61,7 +61,6 @@ export class ElsaWorkflowDesigner {
   @Event() activityContextMenuButtonTestClicked: EventEmitter<ActivityContextMenuState>;
   @State() workflowModel: WorkflowModel;
 
-
   @State() activityContextMenuState: ActivityContextMenuState = {
     shown: false,
     x: 0,
diff --git a/src/designer/elsa-workflows-studio/src/components/screens/workflow-definition-editor/elsa-workflow-definition-editor-screen/elsa-workflow-definition-editor-screen.tsx b/src/designer/elsa-workflows-studio/src/components/screens/workflow-definition-editor/elsa-workflow-definition-editor-screen/elsa-workflow-definition-editor-screen.tsx
index 90464e639..2f587f4cc 100644
--- a/src/designer/elsa-workflows-studio/src/components/screens/workflow-definition-editor/elsa-workflow-definition-editor-screen/elsa-workflow-definition-editor-screen.tsx
+++ b/src/designer/elsa-workflows-studio/src/components/screens/workflow-definition-editor/elsa-workflow-definition-editor-screen/elsa-workflow-definition-editor-screen.tsx
@@ -46,6 +46,7 @@ export class ElsaWorkflowDefinitionEditorScreen {
   @Prop({attribute: 'monaco-lib-path', reflect: true}) monacoLibPath: string;
   @Prop() culture: string;
   @Prop() basePath: string;
+  @Prop() serverFeatures: Array<string> = [];
   @Prop() history: RouterHistory;
   @State() workflowDefinition: WorkflowDefinition;
   @State() workflowModel: WorkflowModel;
@@ -93,6 +94,7 @@ export class ElsaWorkflowDefinitionEditorScreen {
   helpDialog: HTMLElsaModalDialogElement;
   activityContextMenu: HTMLDivElement;
   componentCustomButton: HTMLDivElement;
+
   //connectionContextMenu: HTMLDivElement;
 
   @Method()
@@ -179,7 +181,7 @@ export class ElsaWorkflowDefinitionEditorScreen {
   }
 
   @Listen('click', {target: 'window'})
-  onWindowClicked(event: Event){
+  onWindowClicked(event: Event) {
     const target = event.target as HTMLElement;
 
     if (!this.componentCustomButton.contains(target))
@@ -243,7 +245,7 @@ export class ElsaWorkflowDefinitionEditorScreen {
     state.workflowStorageDescriptors = await client.workflowStorageProvidersApi.list();
   }
 
-  async tryUpdateActivityInformation(activityId: string){
+  async tryUpdateActivityInformation(activityId: string) {
     if (!this.workflowInstanceId) {
       this.activityStats = null;
       this.workflowInstance = null;
@@ -511,8 +513,7 @@ export class ElsaWorkflowDefinitionEditorScreen {
       this.workflowInstanceId = message.workflowInstanceId;
       this.workflowTestActivityMessages = this.workflowTestActivityMessages.filter(x => x.activityId !== message.activityId);
       this.workflowTestActivityMessages = [...this.workflowTestActivityMessages, message];
-    }
-    else{
+    } else {
       this.workflowTestActivityMessages = [];
       this.workflowInstanceId = null;
     }
@@ -520,7 +521,7 @@ export class ElsaWorkflowDefinitionEditorScreen {
     this.render();
   };
 
-  async onRestartActivityButtonClick(){
+  async onRestartActivityButtonClick() {
     await eventBus.emit(EventTypes.WorkflowRestarted, this, this.selectedActivityId);
 
     this.handleContextMenuTestChange(0, 0, false, null);
@@ -543,13 +544,13 @@ export class ElsaWorkflowDefinitionEditorScreen {
   onUpdateActivity = (activity: ActivityModel) => {
     const message = this.workflowTestActivityMessages.find(x => x.activityId === activity.activityId);
 
-    if (message){
+    if (message) {
       message.status = WorkflowTestActivityMessageStatus.Modified;
       this.clearSubsequentWorkflowTestMessages(activity.activityId);
     }
   }
 
-  private clearSubsequentWorkflowTestMessages(activityId: string){
+  private clearSubsequentWorkflowTestMessages(activityId: string) {
     const targetActivityId = this.workflowDefinition.connections.find(x => x.sourceActivityId === activityId)?.targetActivityId;
 
     if (!targetActivityId) return;
@@ -567,8 +568,7 @@ export class ElsaWorkflowDefinitionEditorScreen {
 
     let icon: string;
 
-    switch (testActivityMessage.status)
-    {
+    switch (testActivityMessage.status) {
       case WorkflowTestActivityMessageStatus.Done:
         icon = `<svg class="elsa-h-8 elsa-w-8 elsa-text-green-500"  fill="none" viewBox="0 0 24 24" stroke="currentColor">
                   <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z"/>
@@ -612,7 +612,8 @@ export class ElsaWorkflowDefinitionEditorScreen {
   render() {
     const tunnelState: WorkflowEditorState = {
       serverUrl: this.serverUrl,
-      workflowDefinitionId: this.workflowDefinition.definitionId
+      workflowDefinitionId: this.workflowDefinition.definitionId,
+      serverFeatures: this.serverFeatures
     };
 
     return (
@@ -643,7 +644,7 @@ export class ElsaWorkflowDefinitionEditorScreen {
           </div>`;
 
     return (
-      <div class="elsa-flex-1 elsa-flex elsa-relative" >
+      <div class="elsa-flex-1 elsa-flex elsa-relative">
         <elsa-designer-tree model={this.workflowModel}
                             mode={this.workflowDesignerMode}
                             activityContextMenuButton={this.workflowDesignerMode == WorkflowDesignerMode.Edit
@@ -693,7 +694,7 @@ export class ElsaWorkflowDefinitionEditorScreen {
     await eventBus.emit(EventTypes.ComponentCustomButtonClick, this, componentCustomButtonClickContext);
   }
 
-  private canBeRestartedFromCurrentActivity(){
+  private canBeRestartedFromCurrentActivity() {
     if (!this.selectedActivityId) return false;
     if (this.workflowDesignerMode !== WorkflowDesignerMode.Test) return false;
 
@@ -717,17 +718,18 @@ export class ElsaWorkflowDefinitionEditorScreen {
 
       return (
         <div class="elsa-ml-4">
-          <elsa-workflow-fault-information workflowFault={this.workflowInstance?.fault} faultedAt={this.workflowInstance?.faultedAt} />
+          <elsa-workflow-fault-information workflowFault={this.workflowInstance?.fault}
+                                           faultedAt={this.workflowInstance?.faultedAt}/>
         </div>
       );
     }
 
-    const renderPerformanceStats = () =>{
+    const renderPerformanceStats = () => {
       if (!!message.error) return;
 
       return (
         <div class="elsa-ml-4">
-          <elsa-workflow-performance-information activityStats={this.activityStats} />
+          <elsa-workflow-performance-information activityStats={this.activityStats}/>
         </div>
       );
     };
@@ -737,7 +739,7 @@ export class ElsaWorkflowDefinitionEditorScreen {
 
       return (
         <button type="button"
-          onClick={() => this.onRestartActivityButtonClick()}
+                onClick={() => this.onRestartActivityButtonClick()}
                 class="elsa-ml-0 elsa-w-full elsa-inline-flex elsa-justify-center elsa-rounded-md elsa-border elsa-border-transparent elsa-shadow-sm elsa-px-4 elsa-py-2 elsa-bg-blue-600 elsa-text-base elsa-font-medium elsa-text-white hover:elsa-bg-red-700 focus:elsa-outline-none focus:elsa-ring-2 focus:elsa-ring-offset-2 focus:elsa-ring-red-500 sm:elsa-ml-3 sm:elsa-w-auto sm:elsa-text-sm">
           {this.t('Restart')}
         </button>
@@ -819,7 +821,7 @@ export class ElsaWorkflowDefinitionEditorScreen {
     const renderComponentCustomButton = () => {
 
       if (this.configureComponentCustomButtonContext.data == null)
-      return;
+        return;
 
       const label = this.configureComponentCustomButtonContext.data.label;
 
@@ -846,7 +848,10 @@ export class ElsaWorkflowDefinitionEditorScreen {
       data-transition-leave-start="elsa-transform elsa-opacity-100 elsa-scale-100"
       data-transition-leave-end="elsa-transform elsa-opacity-0 elsa-scale-95"
       class={`${this.activityContextMenuTestState.shown ? '' : 'hidden'} elsa-absolute elsa-z-10 elsa-mt-3 elsa-px-2 elsa-w-screen elsa-max-w-xl sm:elsa-px-0`}
-      style={{left: `${this.activityContextMenuTestState.x + 64}px`, top: `${this.activityContextMenuTestState.y - 256}px`}}
+      style={{
+        left: `${this.activityContextMenuTestState.x + 64}px`,
+        top: `${this.activityContextMenuTestState.y - 256}px`
+      }}
       ref={el => this.componentCustomButton = el}
     >
       <div class="elsa-rounded-lg elsa-shadow-lg elsa-ring-1 elsa-ring-black elsa-ring-opacity-5 elsa-overflow-hidden">
@@ -869,7 +874,7 @@ export class ElsaWorkflowDefinitionEditorScreen {
       data-transition-leave-end="elsa-transform elsa-opacity-0 elsa-scale-95"
       class={`${this.activityContextMenuState.shown ? '' : 'hidden'} context-menu elsa-z-10 elsa-mx-3 elsa-w-48 elsa-mt-1 elsa-rounded-md elsa-shadow-lg elsa-fixed`}
       style={{left: `${this.activityContextMenuState.x}px`, top: `${this.activityContextMenuState.y}px`}}
-      ref={el => this.activityContextMenu = el }
+      ref={el => this.activityContextMenu = el}
     >
       <div class="elsa-rounded-md elsa-bg-white elsa-shadow-xs" role="menu" aria-orientation="vertical"
            aria-labelledby="pinned-project-options-menu-0">
@@ -970,7 +975,8 @@ export class ElsaWorkflowDefinitionEditorScreen {
               </div>
               <div class="elsa-py-3 elsa-flex elsa-justify-between elsa-text-sm elsa-font-medium">
                 <dt class="elsa-text-gray-500">Connect outcomes to existing activity</dt>
-                <dd class="elsa-text-gray-900">Press and hold SHIFT while LEFT-clicking the outcome to connect. Release SHIFT and LEFT-click the target activity.</dd>
+                <dd
+                  class="elsa-text-gray-900">Press and hold SHIFT while LEFT-clicking the outcome to connect. Release SHIFT and LEFT-click the target activity.</dd>
               </div>
               <div class="elsa-py-3 elsa-flex elsa-justify-between elsa-text-sm elsa-font-medium">
                 <dt class="elsa-text-gray-500">Pan</dt>
@@ -1054,17 +1060,28 @@ export class ElsaWorkflowDefinitionEditorScreen {
             workflowDefinition={this.workflowDefinition}
           />
         </elsa-tab-content>
-        <elsa-tab-header tab="test" slot="header">Test</elsa-tab-header>
-        <elsa-tab-content tab="test" slot="content">
-          <elsa-workflow-test-panel
-            workflowDefinition={this.workflowDefinition}
-            workflowTestActivityId={this.selectedActivityId}
-          />
-        </elsa-tab-content>
+        {this.renderTestPanel()}
       </elsa-flyout-panel>
     );
   }
+
+  private renderTestPanel() {
+    const testingEnabled = this.serverFeatures.find(x => x == 'WorkflowTesting');
+
+    if (!testingEnabled)
+      return;
+
+    return [
+      <elsa-tab-header tab="test" slot="header">Test</elsa-tab-header>,
+      <elsa-tab-content tab="test" slot="content">
+        <elsa-workflow-test-panel
+          workflowDefinition={this.workflowDefinition}
+          workflowTestActivityId={this.selectedActivityId}
+        />
+      </elsa-tab-content>
+    ];
+  }
 }
 
 injectHistory(ElsaWorkflowDefinitionEditorScreen);
-DashboardTunnel.injectProps(ElsaWorkflowDefinitionEditorScreen, ['serverUrl', 'culture', 'monacoLibPath', 'basePath']);
+DashboardTunnel.injectProps(ElsaWorkflowDefinitionEditorScreen, ['serverUrl', 'culture', 'monacoLibPath', 'basePath', 'serverFeatures']);
diff --git a/src/designer/elsa-workflows-studio/src/data/dashboard.tsx b/src/designer/elsa-workflows-studio/src/data/dashboard.tsx
index dcf629397..65f068f2e 100644
--- a/src/designer/elsa-workflows-studio/src/data/dashboard.tsx
+++ b/src/designer/elsa-workflows-studio/src/data/dashboard.tsx
@@ -6,6 +6,7 @@ export interface DashboardState {
   basePath: string;
   culture: string;
   monacoLibPath: string;
+  serverFeatures: Array<string>;
 }
 
 export default createProviderConsumer<DashboardState>(
@@ -13,7 +14,8 @@ export default createProviderConsumer<DashboardState>(
     serverUrl: null,
     basePath: null,
     culture: null,
-    monacoLibPath: null
+    monacoLibPath: null,
+    serverFeatures: []
   },
   (subscribe, child) => (<context-consumer subscribe={subscribe} renderer={child}/>)
 );
diff --git a/src/designer/elsa-workflows-studio/src/data/workflow-editor.tsx b/src/designer/elsa-workflows-studio/src/data/workflow-editor.tsx
index cca87c00c..6ecd055b8 100644
--- a/src/designer/elsa-workflows-studio/src/data/workflow-editor.tsx
+++ b/src/designer/elsa-workflows-studio/src/data/workflow-editor.tsx
@@ -4,12 +4,14 @@ import {h} from "@stencil/core";
 export interface WorkflowEditorState {
   workflowDefinitionId: string;
   serverUrl: string;
+  serverFeatures: Array<string>;
 }
 
 export default createProviderConsumer<WorkflowEditorState>(
   {
     workflowDefinitionId: null,
-    serverUrl: null
+    serverUrl: null,
+    serverFeatures: []
   },
   (subscribe, child) => (<context-consumer subscribe={subscribe} renderer={child}/>)
 );
diff --git a/src/designer/elsa-workflows-studio/src/models/services.ts b/src/designer/elsa-workflows-studio/src/models/services.ts
index c3c1ddc37..4d79dfa70 100644
--- a/src/designer/elsa-workflows-studio/src/models/services.ts
+++ b/src/designer/elsa-workflows-studio/src/models/services.ts
@@ -9,6 +9,7 @@ export interface ElsaStudio {
   serverUrl: string;
   basePath: string;
   featuresString: string;
+  serverFeatures: Array<string>;
   pluginManager: PluginManager;
   propertyDisplayManager: PropertyDisplayManager;
   elsaClientFactory: () => Promise<ElsaClient>;
diff --git a/src/designer/elsa-workflows-studio/src/services/elsa-client.ts b/src/designer/elsa-workflows-studio/src/services/elsa-client.ts
index 1e06239e5..c93f974d2 100644
--- a/src/designer/elsa-workflows-studio/src/services/elsa-client.ts
+++ b/src/designer/elsa-workflows-studio/src/services/elsa-client.ts
@@ -244,6 +244,12 @@ export const createElsaClient = async function (serverUrl: string): Promise<Elsa
         return response.data;
       }
     },
+    featuresApi: {
+      list: async () => {
+        const response = await httpClient.get<FeaturesModel>('v1/features');
+        return response.data.features;
+      }
+    },
   }
 
   return _elsaClient;
@@ -261,12 +267,17 @@ export interface ElsaClient {
   workflowStorageProvidersApi: WorkflowStorageProvidersApi;
   workflowChannelsApi: WorkflowChannelsApi;
   workflowTestApi: WorkflowTestApi;
+  featuresApi: FeaturesApi;
 }
 
 export interface ActivitiesApi {
   list(): Promise<Array<ActivityDescriptor>>;
 }
 
+export interface FeaturesApi {
+  list(): Promise<Array<string>>;
+}
+
 export interface WorkflowDefinitionsApi {
 
   list(page?: number, pageSize?: number, versionOptions?: VersionOptions): Promise<PagedList<WorkflowDefinitionSummary>>;
@@ -291,7 +302,9 @@ export interface WorkflowDefinitionsApi {
 export interface WorkflowTestApi {
 
   execute(request: WorkflowTestExecuteRequest): Promise<void>;
+
   restartFromActivity(request: WorkflowTestRestartFromActivityRequest): Promise<void>;
+
   stop(request: WorkflowTestStopRequest): Promise<void>;
 }
 
@@ -418,3 +431,7 @@ interface ActivityEventCount {
 interface ActivityFault {
   message: string;
 }
+
+interface FeaturesModel {
+  features: Array<string>;
+}
diff --git a/src/modules/workflowtesting/Elsa.WorkflowTesting.Api/Extensions/ServiceCollectionExtensions.cs b/src/modules/workflowtesting/Elsa.WorkflowTesting.Api/Extensions/ServiceCollectionExtensions.cs
index 6fd72a78b..1675dc547 100644
--- a/src/modules/workflowtesting/Elsa.WorkflowTesting.Api/Extensions/ServiceCollectionExtensions.cs
+++ b/src/modules/workflowtesting/Elsa.WorkflowTesting.Api/Extensions/ServiceCollectionExtensions.cs
@@ -13,7 +13,8 @@ namespace Elsa.WorkflowTesting.Api.Extensions
             return services
                 .AddScoped<IWorkflowTestLaunchpad, WorkflowTestLaunchpad>()
                 .AddScoped<IWorkflowTestService, WorkflowTestService>()
-                .AddNotificationHandlersFrom<ActivityExecutionResultExecutedHandler>();
+                .AddNotificationHandlersFrom<ActivityExecutionResultExecutedHandler>()
+                .AddTransient<IServerFeatureProvider, WorkflowTestingServerFeatureProvider>();
         }
     }
 }
\ No newline at end of file
diff --git a/src/modules/workflowtesting/Elsa.WorkflowTesting.Api/Services/WorkflowTestingServerFeatureProvider.cs b/src/modules/workflowtesting/Elsa.WorkflowTesting.Api/Services/WorkflowTestingServerFeatureProvider.cs
new file mode 100644
index 000000000..3d914a79c
--- /dev/null
+++ b/src/modules/workflowtesting/Elsa.WorkflowTesting.Api/Services/WorkflowTestingServerFeatureProvider.cs
@@ -0,0 +1,11 @@
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using Elsa.Server.Api.Services;
+
+namespace Elsa.WorkflowTesting.Api.Services;
+
+public class WorkflowTestingServerFeatureProvider : IServerFeatureProvider
+{
+    public ValueTask<IEnumerable<string>> GetFeaturesAsync(CancellationToken cancellationToken) => ValueTask.FromResult<IEnumerable<string>>(new[] { "WorkflowTesting" });
+}
\ No newline at end of file
diff --git a/src/samples/server/Elsa.Samples.Server.Host/Startup.cs b/src/samples/server/Elsa.Samples.Server.Host/Startup.cs
index 7380bb84d..3f89dcdd1 100644
--- a/src/samples/server/Elsa.Samples.Server.Host/Startup.cs
+++ b/src/samples/server/Elsa.Samples.Server.Host/Startup.cs
@@ -95,8 +95,8 @@ namespace Elsa.Samples.Server.Host
             // In a production environment, make sure to allow only origins you trust.
             services.AddCors(cors => cors.AddDefaultPolicy(policy => policy.AllowAnyHeader().AllowAnyMethod().AllowAnyOrigin().WithExposedHeaders("Content-Disposition")));
 
-            //Workflow Testing
-            //services.AddWorkflowTestingServices();
+            // Workflow Testing
+            services.AddWorkflowTestingServices();
         }
 
         public void Configure(IApplicationBuilder app)
@@ -117,7 +117,7 @@ namespace Elsa.Samples.Server.Host
                 .UseElsaFeatures()
                 .UseRouting()
                 .UseEndpoints(endpoints => { endpoints.MapControllers(); })
-                //.MapWorkflowTestHub()
+                .MapWorkflowTestHub()
                 ;
         }
         
diff --git a/src/server/Elsa.Server.Api/Endpoints/Features/List.cs b/src/server/Elsa.Server.Api/Endpoints/Features/List.cs
new file mode 100644
index 000000000..3e2912945
--- /dev/null
+++ b/src/server/Elsa.Server.Api/Endpoints/Features/List.cs
@@ -0,0 +1,57 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Threading;
+using System.Threading.Tasks;
+using Elsa.Server.Api.Services;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using Swashbuckle.AspNetCore.Annotations;
+
+namespace Elsa.Server.Api.Endpoints.Features
+{
+    [ApiController]
+    [ApiVersion("1")]
+    [Route("v{apiVersion:apiVersion}/features")]
+    [Produces("application/json")]
+    public class List : Controller
+    {
+        private readonly IEnumerable<IServerFeatureProvider> _providers;
+
+        public List(IEnumerable<IServerFeatureProvider> providers)
+        {
+            _providers = providers;
+        }
+
+        [HttpGet]
+        [ProducesResponseType(StatusCodes.Status200OK)]
+        [SwaggerOperation(
+            Summary = "Returns a list of features supported by this server.",
+            Description = "Returns a list of features supported by this server.",
+            OperationId = "Features.Get",
+            Tags = new[] { "Features" })
+        ]
+        public async Task<IActionResult> Handle(CancellationToken cancellationToken)
+        {
+            var features = await GetFeaturesAsync(cancellationToken).ToListAsync(cancellationToken);
+
+            var model = new
+            {
+                Features = features
+            };
+
+            return Ok(model);
+        }
+
+        private async IAsyncEnumerable<string> GetFeaturesAsync([EnumeratorCancellation] CancellationToken cancellationToken)
+        {
+            foreach (var provider in _providers)
+            {
+                var features = await provider.GetFeaturesAsync(cancellationToken);
+
+                foreach (var feature in features)
+                    yield return feature;
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/server/Elsa.Server.Api/Services/IServerFeatureProvider.cs b/src/server/Elsa.Server.Api/Services/IServerFeatureProvider.cs
new file mode 100644
index 000000000..fb00580d8
--- /dev/null
+++ b/src/server/Elsa.Server.Api/Services/IServerFeatureProvider.cs
@@ -0,0 +1,10 @@
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Elsa.Server.Api.Services;
+
+public interface IServerFeatureProvider
+{
+    ValueTask<IEnumerable<string>> GetFeaturesAsync(CancellationToken cancellationToken);
+}
\ No newline at end of file