Per editor Connect support v0.1

- Basic plumbing to support connections for a URI rather than global connections. Typical use case is editor requests to connect, but this isn't the only possible use
- Tests pass but need updating to cover new functionality, and re-enable AutoCompleteService test once there is a ServiceDiscovery component that registers and returns services. This is necessary as .Instance won't allow for dependency injection and proper testing.

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

@@ -7,10 +7,57 @@ using Microsoft.SqlTools.ServiceLayer.Hosting.Protocol.Contracts;
 
 namespace Microsoft.SqlTools.ServiceLayer.Connection.Contracts
 {
-    /// <summary>
-    /// Message format for the initial connection request
+    /// <summary>
+    /// Parameters for the Connect Request.
     /// </summary>
-    public class ConnectionDetails
+    public class ConnectParams
+    {
+        /// <summary>
+        /// A URI identifying the owner of the connection. This will most commonly be a file in the workspace
+        /// or a virtual file representing an object in a database.         
+        /// </summary>
+        public string OwnerUri { get; set;  }
+        /// <summary>
+        /// Contains the required parameters to initialize a connection to a database.
+        /// A connection will identified by its server name, database name and user name.
+        /// This may be changed in the future to support multiple connections with different 
+        /// connection properties to the same database.
+        /// </summary>
+        public ConnectionDetails Connection { get; set; }
+    }
+
+    /// <summary>
+    /// Parameters for the Disconnect Request.
+    /// </summary>
+    public class DisconnectParams
+    {
+        /// <summary>
+        /// A URI identifying the owner of the connection. This will most commonly be a file in the workspace
+        /// or a virtual file representing an object in a database.         
+        /// </summary>
+        public string ownerUri { get; set; }
+    }
+
+    /// <summary>
+    /// Parameters for the ConnectionChanged Notification.
+    /// </summary>
+    public class ConnectionChangedParams
+    {
+        /// <summary>
+        /// A URI identifying the owner of the connection. This will most commonly be a file in the workspace
+        /// or a virtual file representing an object in a database.         
+        /// </summary>
+        public string ownerUri { get; set; }
+        /// <summary>
+        /// Contains the high-level properties about the connection, for display to the user.
+        /// </summary>
+        public ConnectionSummary Connection { get; set; }
+    }
+
+    /// <summary>
+    /// Provides high level information about a connection.
+    /// </summary>
+    public class ConnectionSummary
     {
         /// <summary>
         /// Gets or sets the connection server name
@@ -25,39 +72,66 @@ namespace Microsoft.SqlTools.ServiceLayer.Connection.Contracts
         /// <summary>
         /// Gets or sets the connection user name
         /// </summary>
-        public string UserName { get; set; }
-
+        public string UserName { get; set; }
+    }
+    /// <summary>
+    /// Message format for the initial connection request
+    /// </summary>
+    public class ConnectionDetails : ConnectionSummary
+    {
         /// <summary>
         /// Gets or sets the connection password
         /// </summary>
         /// <returns></returns>
         public string Password { get; set; }
+
+        // TODO Handle full set of properties
     }
 
     /// <summary>
     /// Message format for the connection result response
     /// </summary>
-    public class ConnectionResult
+    public class ConnectResponse
     {
         /// <summary>
-        /// Gets or sets the connection id
+        /// A GUID representing a unique connection ID
         /// </summary>
-        public int ConnectionId { get; set; }
+        public string ConnectionId { get; set; }
 
         /// <summary>
         /// Gets or sets any connection error messages
         /// </summary>
         public string Messages { get; set; }
-    }
-
+    }
+
     /// <summary>
     /// Connect request mapping entry 
     /// </summary>
     public class ConnectionRequest
     {
         public static readonly
-            RequestType<ConnectionDetails, ConnectionResult> Type =
-            RequestType<ConnectionDetails, ConnectionResult>.Create("connection/connect");
+            RequestType<ConnectParams, ConnectResponse> Type =
+            RequestType<ConnectParams, ConnectResponse>.Create("connection/connect");
+    }
+
+    /// <summary>
+    /// Disconnect request mapping entry 
+    /// </summary>
+    public class DisconnectRequest
+    {
+        public static readonly
+            RequestType<DisconnectParams, bool> Type =
+            RequestType<DisconnectParams, bool>.Create("connection/disconnect");
+    }
+
+    /// <summary>
+    /// ConnectionChanged notification mapping entry 
+    /// </summary>
+    public class ConnectionChangedNotification
+    {
+        public static readonly
+            EventType<ConnectionChangedParams> Type =
+            EventType<ConnectionChangedParams>.Create("connection/connectionchanged");
     }
 
 }