initial implentation of prepare rename provider

Author: Razmo99

src/PowerShellEditorServices/Server/PsesLanguageServer.cs

@@ -123,6 +123,7 @@ public async Task StartAsync()
  .WithHandler<ExpandAliasHandler>()
  .WithHandler<PsesSemanticTokensHandler>()
  .WithHandler<DidChangeWatchedFilesHandler>()
+ .WithHandler<PrepareRenameSymbolHandler>()
  .WithHandler<RenameSymbolHandler>()
  // NOTE: The OnInitialize delegate gets run when we first receive the
  // _Initialize_ request:

src/PowerShellEditorServices/Services/PowerShell/Handlers/PrepareRenameSymbol.cs

@@ -0,0 +1,71 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+using System.Threading;
+using System.Threading.Tasks;
+using MediatR;
+using System.Management.Automation.Language;
+using OmniSharp.Extensions.JsonRpc;
+using Microsoft.PowerShell.EditorServices.Services.Symbols;
+using Microsoft.PowerShell.EditorServices.Services;
+using Microsoft.Extensions.Logging;
+using Microsoft.PowerShell.EditorServices.Services.TextDocument;
+
+namespace Microsoft.PowerShell.EditorServices.Handlers
+{
+ [Serial, Method("powerShell/PrepareRenameSymbol")]
+ internal interface IPrepareRenameSymbolHandler : IJsonRpcRequestHandler<PrepareRenameSymbolParams, PrepareRenameSymbolResult> { }
+
+ internal class PrepareRenameSymbolParams : IRequest<PrepareRenameSymbolResult>
+ {
+ public string FileName { get; set; }
+ public int Line { get; set; }
+ public int Column { get; set; }
+ public string RenameTo { get; set; }
+ }
+ internal class PrepareRenameSymbolResult
+ {
+ public string Message;
+ }
+
+ internal class PrepareRenameSymbolHandler : IPrepareRenameSymbolHandler
+ {
+ private readonly ILogger _logger;
+ private readonly WorkspaceService _workspaceService;
+
+ public PrepareRenameSymbolHandler(ILoggerFactory loggerFactory, WorkspaceService workspaceService)
+ {
+ _logger = loggerFactory.CreateLogger<RenameSymbolHandler>();
+ _workspaceService = workspaceService;
+ }
+ public async Task<PrepareRenameSymbolResult> Handle(PrepareRenameSymbolParams request, CancellationToken cancellationToken)
+ {
+ if (!_workspaceService.TryGetFile(request.FileName, out ScriptFile scriptFile))
+ {
+ _logger.LogDebug("Failed to open file!");
+ return await Task.FromResult<PrepareRenameSymbolResult>(null).ConfigureAwait(false);
+ }
+ return await Task.Run(() =>
+ {
+ PrepareRenameSymbolResult result = new();
+ SymbolReference symbol = scriptFile.References.TryGetSymbolAtPosition(
+ request.Line + 1,
+ request.Column + 1);
+
+ if (symbol == null) { result.Message="Unable to Find Symbol"; return result; }
+
+ Ast token = scriptFile.ScriptAst.Find(ast =>
+ {
+ return ast.Extent.StartLineNumber == symbol.NameRegion.StartLineNumber &&
+ ast.Extent.StartColumnNumber == symbol.NameRegion.StartColumnNumber;
+ }, true);
+
+
+
+ result.Message = "Nope cannot do";
+
+ return result;
+ }).ConfigureAwait(false);
+ }
+ }
+}