Process code formatting preset options

src/PowerShellEditorServices.Protocol/Server/LanguageServer.cs

@@ -1228,7 +1228,7 @@ private async Task<Tuple<string, Range>> Format(
             Range range)
         {
             var scriptFile = editorSession.Workspace.GetFile(documentUri);
-            var pssaSettings = currentSettings.CodeFormatting.GetPSSASettingsHashTable(
+            var pssaSettings = currentSettings.CodeFormatting.GetPSSASettingsHashtable(
                 options.TabSize,
                 options.InsertSpaces);
 

src/PowerShellEditorServices.Protocol/Server/LanguageServerSettings.cs

@@ -8,6 +8,8 @@
 using System;
 using System.Reflection;
 using System.Collections;
+using System.Linq;
+using System.Collections.Generic;
 
 namespace Microsoft.PowerShell.EditorServices.Protocol.Server
 {
@@ -93,11 +95,33 @@ public void Update(
         }
     }
 
+    /// <summary>
+    /// code formatting presets
+    /// </summary>
+    public enum CodeFormattingPreset
+    {
+
+        /// <summary>
+        /// Use the formatting settings as-is.
+        /// </summary>
+        Custom,
+
+        /// <summary>
+        /// Configure the formatting settings to resemble the one true brace style variant of KR indent/brace style.
+        /// </summary>
+        OTBS,
+
+        /// <summary>
+        /// Configure the formatting settings to resemble the Allman indent/brace style.
+        /// </summary>
+        Allman
+    }
+
     public class CodeFormattingSettings
     {
         /// <summary>
         /// Default constructor.
-        /// </summary>
+        /// </summary>>
         public CodeFormattingSettings()
         {
 
@@ -120,6 +144,7 @@ public CodeFormattingSettings(CodeFormattingSettings codeFormattingSettings)
             }
         }
 
+        public CodeFormattingPreset Preset { get; set; }
         public bool OpenBraceOnSameLine { get; set; }
         public bool NewLineAfterOpenBrace { get; set; }
         public bool NewLineAfterCloseBrace { get; set; }
@@ -130,7 +155,43 @@ public CodeFormattingSettings(CodeFormattingSettings codeFormattingSettings)
         public bool IgnoreOneLineBlock { get; set; }
         public bool AlignPropertyValuePairs { get; set; }
 
-        public Hashtable GetPSSASettingsHashTable(int tabSize, bool insertSpaces)
+
+        /// <summary>
+        /// Get the settings hashtable that will be consumed by PSScriptAnalyzer.
+        /// </summary>
+        /// <param name="tabSize">The tab size in the number spaces.</param>
+        /// <param name="insertSpaces">If true, insert spaces otherwise insert tabs for indentation.</param>
+        /// <returns></returns>
+        public Hashtable GetPSSASettingsHashtable(
+            int tabSize,
+            bool insertSpaces)
+        {
+            var settings = GetCustomPSSASettingsHashtable(tabSize, insertSpaces);
+            var ruleSettings = (Hashtable)(settings["Rules"]);
+            var closeBraceSettings = (Hashtable)ruleSettings["PSPlaceCloseBrace"];
+            var openBraceSettings = (Hashtable)ruleSettings["PSPlaceOpenBrace"];
+            switch(Preset)
+            {
+                case CodeFormattingPreset.Allman:
+                    openBraceSettings["OnSameLine"] = false;
+                    openBraceSettings["NewLineAfter"] = true;
+                    closeBraceSettings["NewLineAfter"] = true;
+                    break;
+
+                case CodeFormattingPreset.OTBS:
+                    openBraceSettings["OnSameLine"] = true;
+                    openBraceSettings["NewLineAfter"] = true;
+                    closeBraceSettings["NewLineAfter"] = false;
+                    break;
+
+                default:
+                    break;
+            }
+
+            return settings;
+        }
+
+        private Hashtable GetCustomPSSASettingsHashtable(int tabSize, bool insertSpaces)
         {
             return new Hashtable
             {