The last 10% of the refactor

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src/ServiceHost/SqlContext/HostDetails.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 System;
+
+namespace Microsoft.SqlTools.ServiceLayer.SqlContext
+{
+    /// <summary>
+    /// Contains details about the current host application (most
+    /// likely the editor which is using the host process).
+    /// </summary>
+    public class HostDetails
+    {
+        #region Constants
+
+        /// <summary>
+        /// The default host name for SqlTools Editor Services.  Used
+        /// if no host name is specified by the host application.
+        /// </summary>
+        public const string DefaultHostName = "SqlTools Editor Services Host";
+
+        /// <summary>
+        /// The default host ID for SqlTools Editor Services.  Used
+        /// for the host-specific profile path if no host ID is specified.
+        /// </summary>
+        public const string DefaultHostProfileId = "Microsoft.SqlToolsEditorServices";
+
+        /// <summary>
+        /// The default host version for SqlTools Editor Services.  If
+        /// no version is specified by the host application, we use 0.0.0
+        /// to indicate a lack of version.
+        /// </summary>
+        public static readonly Version DefaultHostVersion = new Version("0.0.0");
+
+        /// <summary>
+        /// The default host details in a HostDetails object.
+        /// </summary>
+        public static readonly HostDetails Default = new HostDetails(null, null, null);
+
+        #endregion
+
+        #region Properties
+
+        /// <summary>
+        /// Gets the name of the host.
+        /// </summary>
+        public string Name { get; private set; }
+
+        /// <summary>
+        /// Gets the profile ID of the host, used to determine the
+        /// host-specific profile path.
+        /// </summary>
+        public string ProfileId { get; private set; }
+
+        /// <summary>
+        /// Gets the version of the host.
+        /// </summary>
+        public Version Version { get; private set; }
+
+        #endregion
+
+        #region Constructors
+
+        /// <summary>
+        /// Creates an instance of the HostDetails class.
+        /// </summary>
+        /// <param name="name">
+        /// The display name for the host, typically in the form of
+        /// "[Application Name] Host".
+        /// </param>
+        /// <param name="profileId">
+        /// The identifier of the SqlTools host to use for its profile path.
+        /// loaded. Used to resolve a profile path of the form 'X_profile.ps1'
+        /// where 'X' represents the value of hostProfileId.  If null, a default
+        /// will be used.
+        /// </param>
+        /// <param name="version">The host application's version.</param>
+        public HostDetails(
+            string name,
+            string profileId,
+            Version version)
+        {
+            this.Name = name ?? DefaultHostName;
+            this.ProfileId = profileId ?? DefaultHostProfileId;
+            this.Version = version ?? DefaultHostVersion;
+        }
+
+        #endregion
+    }
+}