Add handler to format document with default settings

Author: Kapil Borle

src/PowerShellEditorServices.Protocol/Server/LanguageServer.cs

@@ -1158,6 +1158,34 @@ protected async Task HandleDocumentFormattingRequest(
         {
             // TODO Get settings
             // TODO Update settings to store code formatting settings
+            var scriptFile = editorSession.Workspace.GetFile(formattingParams.TextDocument.Uri);
+            var formattedScript = await editorSession.AnalysisService.Format(scriptFile.Contents);
+            var extent = scriptFile.ScriptAst.Extent;
+
+            // todo create an extension for this
+            var editRange = new Range
+            {
+                Start = new Position
+                {
+                    Line = extent.StartLineNumber - 1,
+                    Character = extent.StartColumnNumber - 1
+                },
+                End = new Position
+                {
+                    Line = extent.EndLineNumber - 1,
+                    Character = extent.EndColumnNumber - 1
+                }
+            };
+
+            await requestContext.SendResult(new TextEdit[1]
+            {
+                new TextEdit
+                {
+                    Range = editRange,
+                    NewText = formattedScript
+                },
+
+            });
         }
 
         protected Task HandleEvaluateRequest(

src/PowerShellEditorServices/Analysis/AnalysisService.cs

@@ -245,6 +245,17 @@ public IEnumerable<string> GetPSScriptAnalyzerRules()
             return ruleNames;
         }
 
+        public async Task<string> Format(string scriptDefinition)
+        {
+            var result = InvokePowerShellAsync(
+                "Invoke-Formatter",
+                new Dictionary<string, object> {
+                    {"ScriptDefinition", scriptDefinition}
+                });
+
+            return (await result)?.Select(r => r.ImmediateBaseObject as string).FirstOrDefault();
+        }
+
         /// <summary>
         /// Disposes the runspace being used by the analysis service.
         /// </summary>