Implement support for activity property ordering

Closes #884

src/activities/Elsa.Activities.Email/Activities/SendEmail/SendEmail.cs

@@ -34,10 +34,20 @@ public SendEmail(ISmtpService smtpService, IOptions<SmtpOptions> options)
         [ActivityInput(Hint = "The recipients email addresses.", UIHint = ActivityInputUIHints.MultiText, DefaultSyntax = SyntaxNames.Json, SupportedSyntaxes = new[] { SyntaxNames.Json, SyntaxNames.JavaScript })]
         public ICollection<string> To { get; set; } = new List<string>();
 
-        [ActivityInput(Hint = "The cc recipients email addresses. (Optional)", UIHint = ActivityInputUIHints.MultiText, DefaultSyntax = SyntaxNames.Json, SupportedSyntaxes = new[] { SyntaxNames.Json, SyntaxNames.JavaScript })]
+        [ActivityInput(
+            Hint = "The cc recipients email addresses.", 
+            UIHint = ActivityInputUIHints.MultiText, 
+            DefaultSyntax = SyntaxNames.Json, 
+            SupportedSyntaxes = new[] { SyntaxNames.Json, SyntaxNames.JavaScript },
+            Category = "More")]
         public ICollection<string> Cc { get; set; } = new List<string>();
 
-        [ActivityInput(Hint = "The Bcc recipients email addresses. (Optional)", UIHint = ActivityInputUIHints.MultiText, DefaultSyntax = SyntaxNames.Json, SupportedSyntaxes = new[] { SyntaxNames.Json, SyntaxNames.JavaScript })]
+        [ActivityInput(
+            Hint = "The Bcc recipients email addresses.", 
+            UIHint = ActivityInputUIHints.MultiText, 
+            DefaultSyntax = SyntaxNames.Json, 
+            SupportedSyntaxes = new[] { SyntaxNames.Json, SyntaxNames.JavaScript },
+            Category = "More")]
         public ICollection<string> Bcc { get; set; } = new List<string>();
 
         [ActivityInput(Hint = "The subject of the email message.", SupportedSyntaxes = new[] { SyntaxNames.JavaScript, SyntaxNames.Liquid })]

src/activities/Elsa.Activities.Http/Activities/WriteHttpResponse/WriteHttpResponse.cs

@@ -39,7 +39,8 @@ public WriteHttpResponse(IHttpContextAccessor httpContextAccessor, IStringLocali
             Hint = "The HTTP status code to write.",
             Options = new[] { HttpStatusCode.OK, HttpStatusCode.Created, HttpStatusCode.Accepted, HttpStatusCode.NoContent, HttpStatusCode.Redirect, HttpStatusCode.BadRequest, HttpStatusCode.NotFound, HttpStatusCode.Conflict },
             SupportedSyntaxes = new[] { SyntaxNames.Literal, SyntaxNames.JavaScript, SyntaxNames.Liquid },
-            DefaultValue = HttpStatusCode.OK
+            DefaultValue = HttpStatusCode.OK,
+            Category = PropertyCategories.Advanced
         )]
         public HttpStatusCode StatusCode { get; set; } = HttpStatusCode.OK;
 
@@ -60,17 +61,18 @@ public WriteHttpResponse(IHttpContextAccessor httpContextAccessor, IStringLocali
             SupportedSyntaxes = new[] { SyntaxNames.Literal, SyntaxNames.JavaScript, SyntaxNames.Liquid }
         )]
         public string? ContentType { get; set; } = "text/plain";
-        
+
         /// <summary>
         /// The character set to use when writing the response.
         /// </summary>
         [ActivityInput(
-            Hint = "The character set to use when writing the response.", 
+            Hint = "The character set to use when writing the response.",
             UIHint = ActivityInputUIHints.Dropdown,
             Options = new[] { "utf-8", "ASCII", "ANSI", "ISO-8859-1" },
             DefaultValue = "utf-8",
-            SupportedSyntaxes = new[] { SyntaxNames.Literal, SyntaxNames.JavaScript, SyntaxNames.Liquid })]
-        public string CharSet { get; set; }
+            SupportedSyntaxes = new[] { SyntaxNames.Literal, SyntaxNames.JavaScript, SyntaxNames.Liquid },
+            Category = PropertyCategories.Advanced)]
+        public string CharSet { get; set; } = "utf-8";
 
         /// <summary>
         /// The headers to send along with the response.
@@ -79,7 +81,8 @@ public WriteHttpResponse(IHttpContextAccessor httpContextAccessor, IStringLocali
             Hint = "Additional headers to write.", 
             UIHint = ActivityInputUIHints.MultiLine,
             DefaultSyntax = SyntaxNames.Json,
-            SupportedSyntaxes = new[]{ SyntaxNames.JavaScript, SyntaxNames.Liquid, SyntaxNames.Json }
+            SupportedSyntaxes = new[]{ SyntaxNames.JavaScript, SyntaxNames.Liquid, SyntaxNames.Json },
+            Category = PropertyCategories.Advanced
         )]
         public HttpResponseHeaders? ResponseHeaders { get; set; }
 

src/activities/Elsa.Activities.Webhooks/ActivityTypes/WebhookActivityTypeProvider.cs

@@ -66,6 +66,7 @@ private ActivityType CreateWebhookActivityType(WebhookDefinition webhook)
                         "Specify what request method this webhook should handle. Leave empty to handle both GET and POST requests",
                         new[] { "", "GET", "POST" },
                         "Webhooks",
+                        0,
                         "POST",
                         SyntaxNames.Literal,
                         new[] { SyntaxNames.JavaScript, SyntaxNames.Liquid })

src/core/Elsa.Abstractions/Attributes/ActivityInputAttribute.cs

@@ -40,6 +40,11 @@ public class ActivityInputAttribute : Attribute
         /// </summary>
         public string? Category { get; set; }
 
+        /// <summary>
+        /// A value to order this property by. Properties are displayed in ascending order (lower appears before higher).
+        /// </summary>
+        public float Order { get; set; }
+
         /// <summary>
         /// The default value to set.
         /// </summary>

src/core/Elsa.Abstractions/Metadata/ActivityInputDescriptor.cs

@@ -18,6 +18,7 @@ public ActivityInputDescriptor()
             string? hint = default,
             object? options = default,
             string? category = default,
+            float order = 0,
             object? defaultValue = default,
             string? defaultSyntax = "Literal",
             IEnumerable<string>? supportedSyntaxes = default)
@@ -29,6 +30,7 @@ public ActivityInputDescriptor()
             Hint = hint;
             Options = options;
             Category = category;
+            Order = order;
             DefaultValue = defaultValue;
             DefaultSyntax = defaultSyntax;
             SupportedSyntaxes = supportedSyntaxes?.ToList() ?? new List<string>();
@@ -41,6 +43,7 @@ public ActivityInputDescriptor()
         public string? Hint { get; set; }
         public object? Options { get; set; }
         public string? Category { get; set; }
+        public float Order { get; set; }
         public object? DefaultValue { get; set; }
         public string? DefaultSyntax { get; set; }
         public IList<string> SupportedSyntaxes { get; set; } = new List<string>();

src/core/Elsa.Core/Activities/Signaling/Activities/SignalReceived/SignalReceived.cs

@@ -2,6 +2,7 @@
 using Elsa.Activities.Signaling.Models;
 using Elsa.ActivityResults;
 using Elsa.Attributes;
+using Elsa.Design;
 using Elsa.Expressions;
 using Elsa.Services;
 using Elsa.Services.Models;
@@ -22,9 +23,12 @@ public class SignalReceived : Activity
         [ActivityInput(Hint = "The name of the signal to wait for.", SupportedSyntaxes = new[] { SyntaxNames.JavaScript, SyntaxNames.Liquid })]
         public string Signal { get; set; } = default!;
 
-        [ActivityInput(Hint = "The scope of the signal to wait for.", SupportedSyntaxes = new[] { SyntaxNames.JavaScript, SyntaxNames.Liquid }, DefaultValue = SignalScope.Instance)]
+        [ActivityInput(Hint = "The scope of the signal to wait for.", SupportedSyntaxes = new[] { SyntaxNames.JavaScript, SyntaxNames.Liquid }, DefaultValue = SignalScope.Instance, Category = PropertyCategories.Advanced)]
         public SignalScope Scope { get; set; } = SignalScope.Instance;
 
+        [ActivityOutput(Hint = "The input that was received with the signal.")]
+        public object? SignalInput { get; set; }
+
         protected override bool OnCanExecute(ActivityExecutionContext context)
         {
             if (context.Input is Signal triggeredSignal)
@@ -38,6 +42,7 @@ protected override bool OnCanExecute(ActivityExecutionContext context)
         protected override IActivityExecutionResult OnResume(ActivityExecutionContext context)
         {
             var triggeredSignal = context.GetInput<Signal>()!;
+            SignalInput = triggeredSignal.Input;
             return Done(triggeredSignal.Input);
         }
     }

src/core/Elsa.Core/Metadata/TypedActivityTypeDescriber.cs

@@ -36,7 +36,7 @@ public TypedActivityTypeDescriber(IActivityPropertyOptionsResolver optionsResolv
             var traits = activityAttribute?.Traits ?? ActivityTraits.Action;
             var outcomes = await GetOutcomesAsync(activityAttribute, cancellationToken);
             var properties = activityType.GetProperties();
-            var inputProperties = DescribeInputProperties(properties);
+            var inputProperties = DescribeInputProperties(properties).OrderBy(x => x.Order);
             var outputProperties = DescribeOutputProperties(properties);
 
             return new ActivityDescriptor
@@ -93,6 +93,7 @@ private IEnumerable<ActivityInputDescriptor> DescribeInputProperties(IEnumerable
                     activityPropertyAttribute.Hint,
                     _optionsResolver.GetOptions(propertyInfo),
                     activityPropertyAttribute.Category,
+                    activityPropertyAttribute.Order,
                     _defaultValueResolver.GetDefaultValue(propertyInfo),
                     activityPropertyAttribute.DefaultSyntax,
                     activityPropertyAttribute.SupportedSyntaxes