Added request to list databases on the server for the current connection

src/Microsoft.SqlTools.ServiceLayer/Connection/Contracts/ConnectionDetailsExtensions.cs

@@ -0,0 +1,27 @@
+//
+// 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.Connection.Contracts
+{
+    /// <summary>
+    /// Extension methods for the ConnectionDetails contract class
+    /// </summary>
+    public static class ConnectionDetailsExtensions
+    {
+        /// <summary>
+        /// Create a copy of a connection details object.
+        /// </summary>
+        public static ConnectionDetails Clone(this ConnectionDetails details)
+        {
+            return new ConnectionDetails()
+            {
+                ServerName = details.ServerName,
+                DatabaseName = details.DatabaseName,
+                UserName = details.UserName,
+                Password = details.Password
+            };
+        }
+    }
+}

src/Microsoft.SqlTools.ServiceLayer/Connection/Contracts/ListDatabasesParams.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.
+//
+
+namespace Microsoft.SqlTools.ServiceLayer.Connection.Contracts
+{
+    /// <summary>
+    /// Parameters for the List Databases Request.
+    /// </summary>
+    public class ListDatabasesParams
+    {
+        /// <summary>
+        /// URI of the owner of the connection requesting the list of databases.
+        /// </summary>
+        public string OwnerUri;
+    }
+}

src/Microsoft.SqlTools.ServiceLayer/Connection/Contracts/ListDatabasesRequest.cs

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+//
+// 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.ServiceLayer.Hosting.Protocol.Contracts;
+
+namespace Microsoft.SqlTools.ServiceLayer.Connection.Contracts
+{
+    /// <summary>
+    /// List databases request mapping entry 
+    /// </summary>
+    public class ListDatabasesRequest
+    {
+        public static readonly
+            RequestType<ListDatabasesParams, ListDatabasesResponse> Type =
+            RequestType<ListDatabasesParams, ListDatabasesResponse>.Create("connection/listdatabases");
+    }
+}

src/Microsoft.SqlTools.ServiceLayer/Connection/Contracts/ListDatabasesResponse.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.
+//
+
+namespace Microsoft.SqlTools.ServiceLayer.Connection.Contracts
+{
+    /// <summary>
+    /// Message format for the list databases response
+    /// </summary>
+    public class ListDatabasesResponse
+    {
+        /// <summary>
+        /// Gets or sets the list of database names.
+        /// </summary>
+        public string[] DatabaseNames { get; set; }
+    }
+}