Initial commit of SqlTools Service API

ServiceHost/MessageProtocol/RequestContext.cs

@@ -0,0 +1,47 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+using Newtonsoft.Json.Linq;
+using System.Threading.Tasks;
+
+namespace Microsoft.PowerShell.EditorServices.Protocol.MessageProtocol
+{
+    public class RequestContext<TResult>
+    {
+        private Message requestMessage;
+        private MessageWriter messageWriter;
+
+        public RequestContext(Message requestMessage, MessageWriter messageWriter)
+        {
+            this.requestMessage = requestMessage;
+            this.messageWriter = messageWriter;
+        }
+
+        public async Task SendResult(TResult resultDetails)
+        {
+            await this.messageWriter.WriteResponse<TResult>(
+                resultDetails,
+                requestMessage.Method,
+                requestMessage.Id);
+        }
+
+        public async Task SendEvent<TParams>(EventType<TParams> eventType, TParams eventParams)
+        {
+            await this.messageWriter.WriteEvent(
+                eventType,
+                eventParams);
+        }
+
+        public async Task SendError(object errorDetails)
+        {
+            await this.messageWriter.WriteMessage(
+                Message.ResponseError(
+                    requestMessage.Id,
+                    requestMessage.Method,
+                    JToken.FromObject(errorDetails)));
+        }
+    }
+}
+