Implemented SetVariable activity (#26)

src/activities/Elsa.Activities.Http/Drivers/HttpRequestTriggerDriver.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
@@ -16,13 +17,16 @@ namespace Elsa.Activities.Http.Drivers
     {
         private readonly IHttpContextAccessor httpContextAccessor;
         private readonly IWorkflowExpressionEvaluator expressionEvaluator;
+        private readonly IEnumerable<IContentFormatter> contentFormatters;
 
         public HttpRequestTriggerDriver(
             IHttpContextAccessor httpContextAccessor,
-            IWorkflowExpressionEvaluator expressionEvaluator)
+            IWorkflowExpressionEvaluator expressionEvaluator,
+            IEnumerable<IContentFormatter> contentFormatters)
         {
             this.httpContextAccessor = httpContextAccessor;
             this.expressionEvaluator = expressionEvaluator;
+            this.contentFormatters = contentFormatters;
         }
 
         protected override ActivityExecutionResult OnExecute(HttpRequestTrigger activity, WorkflowExecutionContext workflowContext)
@@ -47,15 +51,22 @@ namespace Elsa.Activities.Http.Drivers
                 {
                     model.Form = (await request.ReadFormAsync(cancellationToken)).ToDictionary(x => x.Key, x => x.Value);
                 }
-                else
-                {
-                    model.Content = await request.ReadBodyAsync();
-                }
+
+                var formatter = SelectContentFormatter(request.ContentType);
+                var content = await request.ReadBodyAsync();
+                model.Content = content;
+                model.FormattedContent = await formatter.FormatAsync(content, request.ContentType);
             }
 
             workflowContext.CurrentScope.LastResult = model;
 
             return Endpoint("Done");
         }
+
+        private IContentFormatter SelectContentFormatter(string contentType)
+        {
+            var formatters = contentFormatters.OrderByDescending(x => x.Priority).ToList();
+            return formatters.FirstOrDefault(x => x.SupportedContentTypes.Contains(contentType, StringComparer.OrdinalIgnoreCase)) ?? formatters.Last();
+        }
     }
 }

src/activities/Elsa.Activities.Http/Models/HttpRequestModel.cs

@@ -11,6 +11,7 @@ namespace Elsa.Activities.Http.Models
         public IDictionary<string, StringValues> QueryString { get; set; }
         public IDictionary<string, StringValues> Headers { get; set; }
         public string Content { get; set; }
+        public object FormattedContent { get; set; }
         public IDictionary<string, StringValues> Form { get; set; }
     }
 }

src/activities/Elsa.Activities.Primitives/Drivers/SetVariableDriver.cs

@@ -19,8 +19,8 @@ namespace Elsa.Activities.Primitives.Drivers
 
         protected override async Task<ActivityExecutionResult> OnExecuteAsync(SetVariable activity, WorkflowExecutionContext workflowContext, CancellationToken cancellationToken)
         {
-            //var value = await expressionEvaluator.EvaluateAsync(activity.ValueExpression, workflowContext, cancellationToken);
-            //workflowContext.CurrentScope.SetVariable(activity.VariableName, value);
+            var value = await expressionEvaluator.EvaluateAsync(activity.ValueExpression, workflowContext, cancellationToken);
+            workflowContext.CurrentScope.SetVariable(activity.VariableName, value);
             return Endpoint("Done");
         }
     }

src/web/modules/Elsa.Web.Activities.Primitives/Drivers/SetVariableDisplay.cs

@@ -1,9 +1,22 @@
 using Elsa.Activities.Primitives.Activities;
+using Elsa.Web.Activities.Primitives.ViewModels;
+using Elsa.Web.Components.ViewModels;
 using Elsa.Web.Drivers;
 
 namespace Elsa.Web.Activities.Primitives.Drivers
 {
-    public class SetVariableDisplay : ActivityDisplayDriver<SetVariable>
+    public class SetVariableDisplay : ActivityDisplayDriver<SetVariable, SetVariableViewModel>
     {
+        protected override void EditActivity(SetVariable activity, SetVariableViewModel model)
+        {
+            model.VariableName = activity.VariableName;
+            model.ValueExpression = new ExpressionViewModel(activity.ValueExpression);
+        }
+
+        protected override void UpdateActivity(SetVariableViewModel model, SetVariable activity)
+        {
+            activity.VariableName = model.VariableName;
+            activity.ValueExpression = model.ValueExpression.ToWorkflowExpression<object>();
+        }
     }
 }

src/web/modules/Elsa.Web.Activities.Primitives/ViewModels/SetVariableViewModel.cs

@@ -0,0 +1,12 @@
+using System.ComponentModel.DataAnnotations;
+using Elsa.Web.Components.ViewModels;
+
+namespace Elsa.Web.Activities.Primitives.ViewModels
+{
+    public class SetVariableViewModel
+    {
+        [Required]
+        public string VariableName { get; set; }
+        public ExpressionViewModel ValueExpression { get; set; }
+    }
+}

src/web/modules/Elsa.Web.Activities.Primitives/Views/SetVariable.Card.cshtml

@@ -1,6 +1,6 @@
-@model Elsa.Web.ViewModels.ActivityShapeModel<Elsa.Activities.Primitives.Activities.SetVariable>
+@model ActivityShapeModel<SetVariable>
 @{
     var activityDescriptor = Model.Activity.Descriptor;
 }
-<h4 class="card-title"><i class="fa fa-gem"></i>@activityDescriptor.DisplayText</h4>
+<h4 class="card-title"><i class="fa fa-pencil"></i>@activityDescriptor.DisplayText</h4>
 <p>@activityDescriptor.Description</p>

src/web/modules/Elsa.Web.Activities.Primitives/Views/SetVariable.Design.cshtml

@@ -1,4 +1,4 @@
-@model Elsa.Web.ViewModels.ActivityShapeModel<Elsa.Activities.Primitives.Activities.SetVariable>
+@model ActivityShapeModel<SetVariable>
 
 <header>
     <h4><i class="fa fa-pencil"></i>@Model.DisplayText</h4>

src/web/modules/Elsa.Web.Activities.Primitives/Views/SetVariable.Edit.cshtml

@@ -0,0 +1,13 @@
+@model SetVariableViewModel
+<div class="form-group">
+    <label asp-for="VariableName">@T["Variable Name"]</label>
+    <input asp-for="VariableName" class="form-control"/>
+    <span asp-validation-for="VariableName" class="text-danger"></span>
+    <small class="form-text text-muted">@T["The name of the variable to set."]</small>
+</div>
+<div class="form-group">
+    <label asp-for="ValueExpression">@T["Value"]</label>
+    <vc:expression-editor model="@Model.ValueExpression" prefix="@Html.NameFor(m => m.ValueExpression)"></vc:expression-editor>
+    <span asp-validation-for="ValueExpression" class="text-danger"></span>
+    <small class="form-text text-muted">@T["Enter an expression that evaluates to the value to use for the variable to set."]</small>
+</div>