Enabling DacFx telemetry (#1993)

* Enabling DacFx telemetry

src/Microsoft.SqlTools.ServiceLayer/SqlContext/SqlToolsSettings.cs

@@ -17,6 +17,7 @@ namespace Microsoft.SqlTools.ServiceLayer.SqlContext
         private ISqlToolsSettingsValues sqlTools = null; 
         private SqlToolsSettingsValues mssqlTools = null; 
         private SqlToolsSettingsValues allSqlTools = null; 
+        private TelemetrySettingsValues telemetrySettings = null;
 
         public ISqlToolsSettingsValues SqlTools 
         { 
@@ -65,6 +66,23 @@ namespace Microsoft.SqlTools.ServiceLayer.SqlContext
             }
         }
 
+        /// <summary>
+        /// Gets or sets the underlying settings value object
+        /// </summary>
+        [JsonProperty("telemetry")]
+        public TelemetrySettingsValues TelemetrySettings
+        {
+            get
+            {
+                this.telemetrySettings ??= new TelemetrySettingsValues();
+                return this.telemetrySettings;
+            }
+            set
+            {
+                this.telemetrySettings = value;
+            }
+        }
+
         /// <summary>
         /// Query execution settings forwarding property
         /// </summary>

src/Microsoft.SqlTools.ServiceLayer/SqlContext/TelemetryLevel.cs

@@ -0,0 +1,15 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+namespace Microsoft.SqlTools.ServiceLayer.SqlContext
+{
+    public enum TelemetryLevel
+    {
+        All,
+        Error,
+        Crash,
+        Off
+    }
+}

src/Microsoft.SqlTools.ServiceLayer/SqlContext/TelemetrySettingsValues.cs

@@ -0,0 +1,18 @@
+//
+// 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;
+
+namespace Microsoft.SqlTools.ServiceLayer.SqlContext
+{
+    public class TelemetrySettingsValues
+    {
+        /// <summary>
+        /// Gets or sets the telemetry level setting 
+        /// </summary>
+        [JsonProperty("telemetryLevel")]
+        public TelemetryLevel Telemetry { get; set; }
+    }
+}