Initial migration service changes for assessment support (#1093)

* Migration service WIP 1

* Assessment DLLs

* WIP

* WIP 2

* Add migration nuget package

* WIP2

* Fix up assessment handler

* WIP

* Fix build scripts

* WIP

* Update Assessment references

* Fix metadata copy to work with publish

src/Microsoft.SqlTools.ServiceLayer/Migration/Contracts/ImpactedObjectInfo.cs

@@ -0,0 +1,19 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+using Microsoft.SqlServer.Management.Assessment;
+
+namespace Microsoft.SqlTools.ServiceLayer.Migration.Contracts
+{
+    /// <summary>
+    /// Describes an item returned by SQL Assessment RPC methods
+    /// </summary>
+    public class ImpactedObjectInfo
+    {
+        public string Name { get; set; }
+        public string ImpactDetail { get; set; }
+        public string ObjectType { get; set; }
+    }
+}

src/Microsoft.SqlTools.ServiceLayer/Migration/Contracts/MigrationAssessmentInfo.cs

@@ -0,0 +1,78 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+using Microsoft.SqlServer.Management.Assessment;
+
+namespace Microsoft.SqlTools.ServiceLayer.Migration.Contracts
+{
+    /// <summary>
+    /// Describes an item returned by SQL Assessment RPC methods
+    /// </summary>
+    public class MigrationAssessmentInfo
+    {
+        /// <summary>
+        /// Gets or sets assessment ruleset version.
+        /// </summary>
+        public string RulesetVersion { get; set; }
+
+        /// <summary>
+        /// Gets or sets assessment ruleset name
+        /// </summary>
+        public string RulesetName { get; set; }
+
+        /// <summary>
+        /// Gets or sets assessed target's type.
+        /// Supported values: 1 - server, 2 - database.
+        /// </summary>
+        public SqlObjectType TargetType { get; set; }
+
+        /// <summary>
+        /// Gets or sets the assessed object's name. 
+        /// </summary>
+        public string TargetName { get; set; }
+
+        /// <summary>
+        /// Gets or sets check's ID.
+        /// </summary>
+        public string CheckId { get; set; }
+
+        /// <summary>
+        /// Gets or sets tags assigned to this item.
+        /// </summary>
+        public string[] Tags { get; set; }
+
+        /// <summary>
+        /// Gets or sets a display name for this item.
+        /// </summary>
+        public string DisplayName { get; set; }
+
+        /// <summary>
+        /// Gets or sets a brief description of the item's purpose.
+        /// </summary>
+        public string Description { get; set; }
+
+        /// <summary>
+        /// Gets or sets a <see cref="string"/> containing
+        /// an link to a page providing detailed explanation
+        /// of the best practice.
+        /// </summary>
+        public string HelpLink { get; set; }
+
+        /// <summary>
+        /// Gets or sets a <see cref="string"/> indicating
+        /// severity level assigned to this items.
+        /// Values are: "Information", "Warning", "Critical".
+        /// </summary>
+        public string Level { get; set; }
+
+        public string Message { get; set; }
+
+        public string AppliesToMigrationTargetPlatform { get; set; }
+
+        public string IssueCategory { get; set; }
+
+        public ImpactedObjectInfo[] ImpactedObjects { get; set; }
+    }
+}

src/Microsoft.SqlTools.ServiceLayer/Migration/Contracts/MigrationAssessmentsRequest.cs

@@ -0,0 +1,44 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+using System.Collections.Generic;
+using Microsoft.SqlTools.Hosting.Protocol.Contracts;
+
+namespace Microsoft.SqlTools.ServiceLayer.Migration.Contracts
+{
+    public class MigrationAssessmentsParams 
+    {
+        public string OwnerUri { get; set; }
+    }
+
+    public class MigrationAssessmentResult
+    {
+        /// <summary>
+        /// Gets the collection of assessment results.
+        /// </summary>
+        public List<MigrationAssessmentInfo> Items { get; } = new List<MigrationAssessmentInfo>();
+
+        /// <summary>
+        /// Gets or sets a value indicating
+        /// if assessment operation was successful.
+        /// </summary>
+        public bool Success { get; set; }
+
+        /// <summary>
+        /// Gets or sets an status message for the operation.
+        /// </summary>
+        public string ErrorMessage { get; set; }
+    }
+
+    /// <summary>
+    /// Retreive metadata for the table described in the TableMetadataParams value
+    /// </summary>
+    public class MigrationAssessmentsRequest
+    {
+        public static readonly
+            RequestType<MigrationAssessmentsParams, MigrationAssessmentResult> Type =
+                RequestType<MigrationAssessmentsParams, MigrationAssessmentResult>.Create("migration/getassessments");
+    }
+}