add parse t-sql script handler (#1561)

* add parse t-sql script handler

* handle error

src/Microsoft.SqlTools.ServiceLayer/DacFx/Contracts/ParseTSqlScriptRequest.cs

@@ -0,0 +1,42 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+using Microsoft.SqlTools.Hosting.Protocol.Contracts;
+using Microsoft.SqlTools.ServiceLayer.Utility;
+
+namespace Microsoft.SqlTools.ServiceLayer.DacFx.Contracts
+{
+    /// <summary>
+    /// Parameters for a parse T-SQL script request.
+    /// </summary>
+    public class ParseTSqlScriptRequestParams
+    {
+        /// <summary>
+        /// Gets or sets the script content
+        /// </summary>
+        public string Script { get; set; }
+
+        /// <summary>
+        /// Gets or sets the DSP.
+        /// </summary>
+        public string DatabaseSchemaProvider { get; set;}
+    }
+
+    /// <summary>
+    /// Result for the ParseTSqlScript Request.
+    /// </summary>
+    public class ParseTSqlScriptResult : ResultStatus
+    {
+        public bool ContainsCreateTableStatement { get; set; }
+    }
+
+    /// <summary>
+    /// Defines the parse T-SQL script request type
+    /// </summary>
+    class ParseTSqlScriptRequest
+    {
+        public static readonly RequestType<ParseTSqlScriptRequestParams, ParseTSqlScriptResult> Type =
+            RequestType<ParseTSqlScriptRequestParams, ParseTSqlScriptResult>.Create("dacfx/parseTSqlScript");
+    }
+}