From dbeda1961ff0a2102ffbed1e8e2efa8c42398ee4 Mon Sep 17 00:00:00 2001
From: Sipke Schoorstra <sipkeschoorstra@outlook.com>
Date: Thu, 18 Nov 2021 14:59:58 +0100
Subject: [PATCH] Add composite activity output sample

---
 .../Activities/Sum.cs                         | 42 +++++++++++++++++++
 ...grammaticCompositeActivitiesConsole.csproj |  8 ++--
 .../Program.cs                                |  5 +--
 .../Workflows/CompositionWorkflow.cs          | 20 ++++++++-
 4 files changed, 67 insertions(+), 8 deletions(-)
 create mode 100644 src/samples/console/Elsa.Samples.ProgrammaticCompositeActivitiesConsole/Activities/Sum.cs

diff --git a/src/samples/console/Elsa.Samples.ProgrammaticCompositeActivitiesConsole/Activities/Sum.cs b/src/samples/console/Elsa.Samples.ProgrammaticCompositeActivitiesConsole/Activities/Sum.cs
new file mode 100644
index 000000000..3a3e32da0
--- /dev/null
+++ b/src/samples/console/Elsa.Samples.ProgrammaticCompositeActivitiesConsole/Activities/Sum.cs
@@ -0,0 +1,42 @@
+using System;
+using Elsa.Activities.ControlFlow;
+using Elsa.Attributes;
+using Elsa.Builders;
+using Elsa.Services;
+
+namespace Elsa.Samples.ProgrammaticCompositeActivitiesConsole.Activities
+{
+    /// <summary>
+    /// Demonstrates accepting input properties and returning an output value from a composite activity.
+    /// </summary>
+    [Action(Outcomes = new[] { "Left", "Right" })]
+    public class Sum : CompositeActivity
+    {
+        [ActivityInput]
+        public int A
+        {
+            get => GetState<int>();
+            set => SetState(value);
+        }
+
+        [ActivityInput]
+        public int B
+        {
+            get => GetState<int>();
+            set => SetState(value);
+        }
+
+        [ActivityOutput]
+        public int Result
+        {
+            get => GetState<int>();
+            set => SetState(value);
+        }
+
+        public override void Build(ICompositeActivityBuilder builder)
+        {
+            builder
+                .StartWith(c => Result = A + B);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/samples/console/Elsa.Samples.ProgrammaticCompositeActivitiesConsole/Elsa.Samples.ProgrammaticCompositeActivitiesConsole.csproj b/src/samples/console/Elsa.Samples.ProgrammaticCompositeActivitiesConsole/Elsa.Samples.ProgrammaticCompositeActivitiesConsole.csproj
index 2b23e71e4..721251245 100644
--- a/src/samples/console/Elsa.Samples.ProgrammaticCompositeActivitiesConsole/Elsa.Samples.ProgrammaticCompositeActivitiesConsole.csproj
+++ b/src/samples/console/Elsa.Samples.ProgrammaticCompositeActivitiesConsole/Elsa.Samples.ProgrammaticCompositeActivitiesConsole.csproj
@@ -7,13 +7,13 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="System.Text.Encodings.Web" Version="5.0.1"/>
-        <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="5.0.2"/>
-        <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="5.0.0"/>
+        <PackageReference Include="System.Text.Encodings.Web" Version="5.0.1" />
+        <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="5.0.2" />
+        <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="5.0.0" />
     </ItemGroup>
 
     <ItemGroup>
-        <ProjectReference Include="..\..\..\core\Elsa\Elsa.csproj"/>
+        <ProjectReference Include="..\..\..\core\Elsa\Elsa.csproj" />
     </ItemGroup>
 
 </Project>
diff --git a/src/samples/console/Elsa.Samples.ProgrammaticCompositeActivitiesConsole/Program.cs b/src/samples/console/Elsa.Samples.ProgrammaticCompositeActivitiesConsole/Program.cs
index be59fbbbd..16934dfd8 100644
--- a/src/samples/console/Elsa.Samples.ProgrammaticCompositeActivitiesConsole/Program.cs
+++ b/src/samples/console/Elsa.Samples.ProgrammaticCompositeActivitiesConsole/Program.cs
@@ -16,9 +16,8 @@ namespace Elsa.Samples.ProgrammaticCompositeActivitiesConsole
                 .AddLogging(logging => logging.AddConsole().SetMinimumLevel(LogLevel.Warning))
                 .AddElsa(options => options
                     .AddConsoleActivities()
-                    .AddActivity<NavigateActivity>()
-                    .AddActivity<CountdownActivity>()
-                    .AddWorkflow<CompositionWorkflow>())
+                    .AddActivitiesFrom<Program>()
+                    .AddWorkflowsFrom<Program>())
                 .BuildServiceProvider();
 
             // Run startup actions (not needed when registering Elsa with a Host).
diff --git a/src/samples/console/Elsa.Samples.ProgrammaticCompositeActivitiesConsole/Workflows/CompositionWorkflow.cs b/src/samples/console/Elsa.Samples.ProgrammaticCompositeActivitiesConsole/Workflows/CompositionWorkflow.cs
index 455dc61bd..d4b1ed564 100644
--- a/src/samples/console/Elsa.Samples.ProgrammaticCompositeActivitiesConsole/Workflows/CompositionWorkflow.cs
+++ b/src/samples/console/Elsa.Samples.ProgrammaticCompositeActivitiesConsole/Workflows/CompositionWorkflow.cs
@@ -20,6 +20,24 @@ namespace Elsa.Samples.ProgrammaticCompositeActivitiesConsole.Workflows
                 countDown.When("Right").WriteLine("Where going right!").ThenNamed("CountdownDemo");
             })
             .WriteLine("=Countdown demo=").WithName("CountdownDemo")
-            .Then<CountdownActivity>(activity => activity.Set(x => x.Start, 10));
+            .Then<CountdownActivity>(activity => activity.Set(x => x.Start, 10))
+            .WriteLine("=Sum demo=").WithName("SumDemo")
+            .WriteLine("Enter first value:")
+            .ReadLine().WithName("ValueA")
+            .WriteLine("Enter second value:")
+            .ReadLine().WithName("ValueB")
+            .Then<Sum>(activity => activity
+                .Set(x => x.A, async context =>
+                {
+                    var a = (await context.WorkflowExecutionContext.GetNamedActivityPropertyAsync<ReadLine, string>("ValueA", r => r.Output))!;
+                    return int.Parse(a);
+                })
+                .Set(x => x.B, async context =>
+                {
+                    var b = (await context.WorkflowExecutionContext.GetNamedActivityPropertyAsync<ReadLine, string>("ValueB", r => r.Output))!;
+                    return int.Parse(b);
+                })
+            ).WithName("Sum1")
+            .WriteLine(async context => $"Sum: {await context.GetNamedActivityPropertyAsync<Sum, int>("Sum1", x => x.Result)}");
     }
 }
\ No newline at end of file