Added support for accessing activity data when providing available endpoints

src/core/Elsa.Abstractions/Handlers/ActivityHandlerBase.cs

@@ -32,7 +32,9 @@ namespace Elsa.Handlers
         protected virtual ActivityExecutionResult OnResume(T activity, WorkflowExecutionContext workflowContext) => Noop();
         protected NoopResult Noop() => new NoopResult();
         protected IEnumerable<LocalizedString> Endpoints(params LocalizedString[] endpoints) => endpoints;
+        public virtual IEnumerable<LocalizedString> GetEndpoints(IActivity activity) => Endpoints();
         public virtual IEnumerable<LocalizedString> GetEndpoints() => Endpoints(GetEndpoint());
-        protected virtual LocalizedString GetEndpoint() => throw new NotImplementedException("At least GetEndpoints or GetEndpoint must be overridden.");
+        protected virtual LocalizedString GetEndpoint(IActivity activity) => GetEndpoint();
+        protected virtual LocalizedString GetEndpoint() => new LocalizedString("Done", "Done", true);
     }
 }

src/core/Elsa.Abstractions/IActivityHandler.cs

@@ -39,7 +39,7 @@ namespace Elsa
         /// Returns the available endpoints that can be triggered.
         /// </summary>
         /// <returns></returns>
-        IEnumerable<LocalizedString> GetEndpoints();
+        IEnumerable<LocalizedString> GetEndpoints(IActivity activity);
         
         /// <summary>
         /// Returns a value of whether the specified activity can execute.

src/core/Elsa.Abstractions/Models/ActivityDescriptor.cs

@@ -16,7 +16,7 @@ namespace Elsa.Models
         public Type ActivityType { get; set; }
         public LocalizedString DisplayText { get; set; }
         public LocalizedString Description { get; set; }
-        public Func<IEnumerable<LocalizedString>> GetEndpoints { get; set; }
+        public Func<IActivity, IEnumerable<LocalizedString>> GetEndpoints { get; set; }
         public Func<ActivityExecutionContext, WorkflowExecutionContext, CancellationToken, Task<bool>> CanExecuteAsync { get; set; }
         public Func<ActivityExecutionContext, WorkflowExecutionContext, CancellationToken, Task<ActivityExecutionResult>> ExecuteAsync { get; set; }
         public Func<ActivityExecutionContext, WorkflowExecutionContext, CancellationToken, Task<ActivityExecutionResult>> ResumeAsync { get; set; }

src/web/modules/Elsa.Web.Components/Services/ActivityShapeFactory.cs

@@ -25,7 +25,7 @@ namespace Elsa.Web.Components.Services
             var designerMetadata = customFields.GetValue("Designer", StringComparison.OrdinalIgnoreCase)?.ToObject<ActivityDesignerMetadata>() ?? new ActivityDesignerMetadata();
             
             shape.Metadata.Type = $"Activity_Design";
-            shape.Endpoints = descriptor.GetEndpoints().ToList();
+            shape.Endpoints = descriptor.GetEndpoints(activity).ToList();
             shape.ActivityDescriptor = descriptor;
             shape.Activity = activity;
             shape.Designer = designerMetadata;