Update restore service to return default backup folder (#475)

* Fix restore to return default backup folder

* fix break

* fix tests

* fix file validator for invalid filepath

src/Microsoft.SqlTools.ServiceLayer/DisasterRecovery/BackupOperation/BackupOperation.cs

@@ -142,7 +142,7 @@ namespace Microsoft.SqlTools.ServiceLayer.DisasterRecovery
         {
             BackupConfigInfo configInfo = new BackupConfigInfo();
             configInfo.RecoveryModel = GetRecoveryModel(databaseName);
-            configInfo.DefaultBackupFolder = GetDefaultBackupFolder();
+            configInfo.DefaultBackupFolder = CommonUtilities.GetDefaultBackupFolder(this.serverConnection);
             configInfo.LatestBackups = GetLatestBackupLocations(databaseName);
             configInfo.BackupEncryptors = GetBackupEncryptors();
             return configInfo;
@@ -338,11 +338,6 @@ namespace Microsoft.SqlTools.ServiceLayer.DisasterRecovery
             return recoveryModel.ToString();
         }
 
-        public string GetDefaultBackupFolder()
-        {
-            return this.backupRestoreUtil.GetDefaultBackupFolder();
-        }
-
         /// <summary>
         /// Return the latest backup locations
         /// </summary>

src/Microsoft.SqlTools.ServiceLayer/DisasterRecovery/CommonUtilities.cs

@@ -320,7 +320,7 @@ namespace Microsoft.SqlTools.ServiceLayer.DisasterRecovery
             return recoveryModelString;
         }
 
-        public string GetDefaultBackupFolder()
+        public static string GetDefaultBackupFolder(ServerConnection connection)
         {
             string backupFolder = "";
 
@@ -330,7 +330,7 @@ namespace Microsoft.SqlTools.ServiceLayer.DisasterRecovery
             Request req = new Request();
             en = new Enumerator();
             req.Urn = "Server/Setting";
-            ds = en.Process(this.sqlConnection, req);
+            ds = en.Process(connection, req);
 
             if (ds.Tables[0].Rows.Count > 0)
             {

src/Microsoft.SqlTools.ServiceLayer/DisasterRecovery/DisasterRecoveryFileValidator.cs

@@ -85,18 +85,25 @@ namespace Microsoft.SqlTools.ServiceLayer.DisasterRecovery
 
         #region private methods
 
+        /// <summary>
+        /// Check if the folder path exists
+        /// </summary>
+        /// <param name="connection">sql connection</param>
+        /// <param name="filePath">full file path</param>
+        /// <returns></returns>
         internal static string IsFolderPathExisting(SqlConnection connection, string filePath)
         {
-            // If the file path doesn't exist, check if the folder exists
             string folderPath = PathWrapper.GetDirectoryName(filePath);
             string errorMessage = string.Empty;
 
-            if (string.Compare(GetMachineName(connection.DataSource), Environment.MachineName, StringComparison.OrdinalIgnoreCase) == 0)
+            if (string.IsNullOrEmpty(folderPath))
             {
-                if (!string.IsNullOrEmpty(folderPath) && !Directory.Exists(folderPath))
-                {
-                    errorMessage = SR.InvalidBackupPathError;
-                }
+                errorMessage = SR.InvalidBackupPathError;
+            }
+            else if (string.Compare(GetMachineName(connection.DataSource), Environment.MachineName, StringComparison.OrdinalIgnoreCase) == 0
+                && !Directory.Exists(folderPath))
+            {
+                errorMessage = SR.InvalidBackupPathError;
             }
             else
             {

src/Microsoft.SqlTools.ServiceLayer/DisasterRecovery/RestoreOperation/RestoreDatabaseHelper.cs

@@ -41,6 +41,8 @@ namespace Microsoft.SqlTools.ServiceLayer.DisasterRecovery.RestoreOperation
                 response.ConfigInfo.Add(RestoreOptionsHelper.LogFileFolder, restoreTaskObject.DefaultLogFileFolder);
                 // The db names with backup set
                 response.ConfigInfo.Add(RestoreOptionsHelper.SourceDatabaseNamesWithBackupSets, restoreTaskObject.GetDatabaseNamesWithBackupSets());
+                // Default backup folder path in the target server
+                response.ConfigInfo.Add(RestoreOptionsHelper.DefaultBackupFolder, restoreTaskObject.DefaultBackupFolder);
             }
 
             return response;

src/Microsoft.SqlTools.ServiceLayer/DisasterRecovery/RestoreOperation/RestoreDatabaseTaskDataObject.cs

@@ -25,6 +25,7 @@ namespace Microsoft.SqlTools.ServiceLayer.DisasterRecovery.RestoreOperation
         string LogFilesFolder { get; set; }
         string DefaultLogFileFolder { get; }
         List<DbFile> DbFiles { get; }
+        string DefaultBackupFolder { get; }
 
         RestoreOptions RestoreOptions { get; }
 
@@ -851,6 +852,14 @@ namespace Microsoft.SqlTools.ServiceLayer.DisasterRecovery.RestoreOperation
             }
         }
 
+        public string DefaultBackupFolder
+        {
+            get
+            {
+                return CommonUtilities.GetDefaultBackupFolder(this.server.ConnectionContext);
+            }
+        }
+
         internal RestorePlan CreateRestorePlan(DatabaseRestorePlanner planner, RestoreOptions restoreOptions)
         {
             this.CreateOrUpdateRestorePlanException = null;

src/Microsoft.SqlTools.ServiceLayer/DisasterRecovery/RestoreOptionsHelper.cs

@@ -53,6 +53,9 @@ namespace Microsoft.SqlTools.ServiceLayer.DisasterRecovery
         //Option name logFileFolder
         internal const string LogFileFolder = "logFileFolder";
 
+        //Option name defaultBackupFolder
+        internal const string DefaultBackupFolder = "defaultBackupFolder";
+
         //The key name to use to set the session id in the request
         internal const string SessionId = "sessionId";