Add WorkflowSerializer service for simplifies workflow deserialization

src/modules/Elsa.Workflows.Management/Contracts/IWorkflowSerializer.cs

@@ -0,0 +1,16 @@
+using Elsa.Workflows.Core.Activities;
+
+namespace Elsa.Workflows.Management.Contracts;
+
+/// <summary>
+/// Serializes and deserializes workflows.
+/// </summary>
+public interface IWorkflowSerializer
+{
+    /// <summary>
+    /// Serializes the specified workflow.
+    /// </summary>
+    /// <param name="serializedWorkflow">The data representing the workflow.</param>
+    /// <returns>A deserialized workflow.</returns>
+    Workflow Deserialize(string serializedWorkflow);
+}

src/modules/Elsa.Workflows.Management/Features/WorkflowManagementFeature.cs

@@ -159,6 +159,7 @@ public class WorkflowManagementFeature : FeatureBase
             .AddMemoryStore<WorkflowInstance, MemoryWorkflowInstanceStore>()
             .AddActivityProvider<TypedActivityProvider>()
             .AddSingleton<IWorkflowDefinitionService, WorkflowDefinitionService>()
+            .AddSingleton<IWorkflowSerializer, WorkflowSerializer>()
             .AddSingleton<IWorkflowValidator, WorkflowValidator>()
             .AddSingleton<IWorkflowDefinitionPublisher, WorkflowDefinitionPublisher>()
             .AddSingleton<IWorkflowDefinitionImporter, WorkflowDefinitionImporter>()

src/modules/Elsa.Workflows.Management/Services/WorkflowSerializer.cs

@@ -0,0 +1,32 @@
+using Elsa.Workflows.Core.Activities;
+using Elsa.Workflows.Core.Contracts;
+using Elsa.Workflows.Management.Contracts;
+using Elsa.Workflows.Management.Mappers;
+using Elsa.Workflows.Management.Models;
+
+namespace Elsa.Workflows.Management.Services;
+
+/// <summary>
+/// A serializer that parses JSON.
+/// </summary>
+public class WorkflowSerializer : IWorkflowSerializer
+{
+    private readonly IApiSerializer _apiSerializer;
+    private readonly WorkflowDefinitionMapper _workflowDefinitionMapper;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="WorkflowSerializer"/> class.
+    /// </summary>
+    public WorkflowSerializer(IApiSerializer apiSerializer, WorkflowDefinitionMapper workflowDefinitionMapper)
+    {
+        _apiSerializer = apiSerializer;
+        _workflowDefinitionMapper = workflowDefinitionMapper;
+    }
+    
+    /// <inheritdoc />
+    public Workflow Deserialize(string serializedWorkflow)
+    {
+        var model = _apiSerializer.Deserialize<WorkflowDefinitionModel>(serializedWorkflow);
+        return _workflowDefinitionMapper.Map(model);
+    }
+}