Add project files.

Caspian.WorkflowFramework.Package/Contracts/IWorkflowService.cs

@@ -0,0 +1,29 @@
+using Caspian.WorkflowFramework.Models;
+
+namespace Caspian.WorkflowFramework.Contracts
+{
+    public interface IWorkflowService
+    {
+        /// <summary>
+        /// Create and executes a new workflow instance.
+        /// </summary>
+        /// <param name="input"></param>
+        /// <returns>A new <see cref="WorkflowResponse<WorkflowModel>"/> object.</returns>
+        /// <remarks>Create a new workflow instance and executes it and waits for it to complete or reach a suspend point.</remarks>
+        Task<WorkflowResponse<WorkflowModel>> CreateAndExecuteAsync(CreateAndExecuteWorkflowModel input);
+
+        /// <summary>
+        /// Publishes the specified event.
+        /// </summary>
+        /// <param name="input"></param>
+        /// <returns>A new <see cref="WorkflowResponse<WorkflowModel>"/> object.</returns>
+        Task<WorkflowResponse<WorkflowModel>> PublishEventAsync(PublishEventModel input);
+
+        /// <summary>
+        /// Inquiry last state of workflow instance.
+        /// </summary>
+        /// <param name="input"></param>
+        /// <returns>A new <see cref="WorkflowResponse<WorkflowModel>"/> object.</returns>
+        Task<WorkflowResponse<WorkflowModel>> InquiryStateAsync(InquiryStateModel input);
+    }
+}