private async Task InsertRequestPipelineMiddlewareRegistrations()
{
try
{
var pipelineAdditions = await _taskManager.ManagedRun(_taskId, (token) => _lifecycleManager.GetMiddlewarePipelineAdditions(token));
_configureMethodStatements = _configureMethodStatements.Concat(pipelineAdditions);
}
catch (OperationCanceledException e)
{
LogHelper.LogError(e, string.Format(
Constants.CaneledServiceCallLogTemplate,
Rules.Config.Constants.WebFormsErrorTag,
GetType().Name,
typeof(LifecycleManagerService).Name,
GetMiddlewarePipelineAdditionsLogCall));
var failureComment = string.Format(Constants.OperationFailedCommentTemplate, ConfigureRequestPipelineOperation);
if (!_configureMethodStatements.Any())
{
// If we don't have any extra statements for configure() add a blank
// one to attach our comment to
_configureMethodStatements = _configureMethodStatements.Append(CodeSyntaxHelper.GetBlankLine().AddComment(failureComment, isLeading: false));
}
else
{
_configureMethodStatements = _configureMethodStatements.AddComment(failureComment, isLeading: false);
}
}
}
public override async Task <IEnumerable <FileInformation> > MigrateClassAsync()
{
LogStart();
_metricsContext.CollectActionMetrics(WebFormsActionType.ClassConversion, ActionName);
// Make this call once now so we don't have to keep doing it later
var originalDescendantNodes = _originalDeclarationSyntax.DescendantNodes();
// Currently not implementing service layer so add blank line with a comment instead
var configureServicesLines = new[]
{
CodeSyntaxHelper.GetBlankLine().AddComment(string.Format(Constants.OperationUnattemptedCommentTemplate, MigrateServiceLayerOperation), isLeading: false)
};
// Iterate through methods and process them as needed
ProcessMethods(originalDescendantNodes.OfType <MethodDeclarationSyntax>());
// With middleware lambdas added we need to retrieve registrations
// before we have all statements required to build startup class
await InsertRequestPipelineMiddlewareRegistrations();
var fileText = string.Empty;
try
{
var startupClassDeclaration = StartupSyntaxHelper.ConstructStartupClass(
constructorAdditionalStatements: originalDescendantNodes.OfType <ConstructorDeclarationSyntax>().FirstOrDefault()?.Body?.Statements,
configureAdditionalStatements: _configureMethodStatements,
configureServicesAdditionalStatements: configureServicesLines,
additionalFieldDeclarations: originalDescendantNodes.OfType <FieldDeclarationSyntax>(),
additionalPropertyDeclarations: originalDescendantNodes.OfType <PropertyDeclarationSyntax>(),
additionalMethodDeclarations: _keepableMethods)
.AddClassBlockComment(_endOfClassComments, false);
var containingNamespace = CodeSyntaxHelper.BuildNamespace(_originalClassSymbol.ContainingNamespace?.ToDisplayString(), startupClassDeclaration);
fileText = CodeSyntaxHelper.GetFileSyntaxAsString(containingNamespace, await GetAllUsingStatements());
}
catch (Exception e)
{
LogHelper.LogError(e, $"{Rules.Config.Constants.WebFormsErrorTag}Failed to construct new Startup file content from {OriginalClassName} class at {_fullPath}");
}
DoCleanUp();
LogEnd();
// Global.asax.cs turns into Startup.cs
var newRelativePath = FilePathHelper.RemoveDuplicateDirectories(Path.Combine(Path.GetDirectoryName(_relativePath), Constants.StartupFileName));
return(new[] { new FileInformation(newRelativePath, Encoding.UTF8.GetBytes(fileText)) });
}
private void ProcessMethods(IEnumerable <MethodDeclarationSyntax> orignalMethods)
{
foreach (var method in orignalMethods)
{
try
{
var lifecycleEvent = LifecycleManagerService.CheckMethodApplicationLifecycleHook(method);
if (lifecycleEvent != null)
{
HandleLifecycleMethod(method, (WebFormsAppLifecycleEvent)lifecycleEvent);
}
else if (method.IsEventHandler(ApplicationStartMethodName))
{
var newStatements = method.Body.Statements
// Make a note of where these lines came from
.AddComment(string.Format(Constants.CodeOriginCommentTemplate, ApplicationStartMethodName))
// Add blank line before new statements to give some separation from previous statements
.Prepend(CodeSyntaxHelper.GetBlankLine());
_configureMethodStatements = _configureMethodStatements.Concat(newStatements);
}
else if (method.IsEventHandler(ApplicationEndMethodName) || method.IsEventHandler(SessionStartMethodName) || method.IsEventHandler(SessionEndMethodName))
{
CommentOutMethod(method);
}
else
{
_keepableMethods = _keepableMethods.Append(method);
}
}
catch (Exception e)
{
LogHelper.LogError(e, $"{Rules.Config.Constants.WebFormsErrorTag}Failed to process {method.Identifier} method in {OriginalClassName} class at {_fullPath}");
}
}
// We added all discovered middleware methods as lambdas so global has been
// processed as a middleware source
_lifecycleManager.NotifyMiddlewareSourceProcessed();
}
private void ProcessLifecycleEventMethod(MethodDeclarationSyntax methodDeclaration, WebFormsPageLifecycleEvent lifecycleEvent)
{
var statements = (IEnumerable <StatementSyntax>)methodDeclaration.Body.Statements;
// Dont do anything if the method is empty, no reason to move over nothing
if (statements.Any())
{
statements = statements.AddComment(string.Format(Constants.NewEventRepresentationCommentTemplate, lifecycleEvent.ToString()));
var blazorLifecycleEvent = LifecycleManagerService.GetEquivalentComponentLifecycleEvent(lifecycleEvent);
if (_newLifecycleLines.ContainsKey(blazorLifecycleEvent))
{
// Add spacing between last added method
statements = statements.Prepend(CodeSyntaxHelper.GetBlankLine());
_newLifecycleLines[blazorLifecycleEvent] = _newLifecycleLines[blazorLifecycleEvent].Concat(statements);
}
else
{
_newLifecycleLines.Add(blazorLifecycleEvent, statements);
}
}
}
public override Task <IEnumerable <FileInformation> > MigrateClassAsync()
{
LogStart();
_metricsContext.CollectActionMetrics(WebFormsActionType.ClassConversion, ActionName);
var className = _originalDeclarationSyntax.Identifier.ToString();
var namespaceName = _originalClassSymbol.ContainingNamespace?.ToDisplayString();
// NOTE: Removed temporarily until usings can be better determined, at the moment, too
// many are being removed
//var requiredNamespaceNames = _sourceFileSemanticModel
// .GetNamespacesReferencedByType(_originalDeclarationSyntax)
// .Select(namespaceSymbol => namespaceSymbol.ToDisplayString());
var requiredNamespaceNames = _sourceFileSemanticModel.GetOriginalUsingNamespaces()
.Union(MiddlewareSyntaxHelper.RequiredNamespaces);
requiredNamespaceNames = CodeSyntaxHelper.RemoveFrameworkUsings(requiredNamespaceNames);
// Make this call once now so we don't have to keep doing it later
var originalDescendantNodes = _originalDeclarationSyntax.DescendantNodes();
var keepableMethods = originalDescendantNodes.OfType <MethodDeclarationSyntax>();
var processRequestMethod = keepableMethods.Where(method => LifecycleManagerService.IsProcessRequestMethod(method)).SingleOrDefault();
IEnumerable <StatementSyntax> preHandleStatements;
if (processRequestMethod != null)
{
preHandleStatements = processRequestMethod.Body.Statements.AddComment(string.Format(Constants.CodeOriginCommentTemplate, Constants.ProcessRequestMethodName));
keepableMethods = keepableMethods.Where(method => !method.IsEquivalentTo(processRequestMethod));
_lifecycleManager.RegisterMiddlewareClass(WebFormsAppLifecycleEvent.RequestHandlerExecute, className, namespaceName, className, false);
}
else
{
preHandleStatements = new[]
{
CodeSyntaxHelper.GetBlankLine().AddComment(string.Format(Constants.IdentificationFailureCommentTemplate, ProcessRequestDiscovery, InvokePopulationOperation))
};
}
// We have completed any possible registration by this point
_lifecycleManager.NotifyMiddlewareSourceProcessed();
var fileText = string.Empty;
try
{
var middlewareClassDeclaration = MiddlewareSyntaxHelper.ConstructMiddlewareClass(
middlewareClassName: className,
shouldContinueAfterInvoke: false,
constructorAdditionalStatements: originalDescendantNodes.OfType <ConstructorDeclarationSyntax>().FirstOrDefault()?.Body?.Statements,
preHandleStatements: preHandleStatements,
additionalFieldDeclarations: originalDescendantNodes.OfType <FieldDeclarationSyntax>(),
additionalPropertyDeclarations: originalDescendantNodes.OfType <PropertyDeclarationSyntax>(),
additionalMethodDeclarations: keepableMethods);
var namespaceNode = CodeSyntaxHelper.BuildNamespace(namespaceName, middlewareClassDeclaration);
fileText = CodeSyntaxHelper.GetFileSyntaxAsString(namespaceNode, CodeSyntaxHelper.BuildUsingStatements(requiredNamespaceNames));
}
catch (Exception e)
{
LogHelper.LogError(e, $"{Rules.Config.Constants.WebFormsErrorTag}Failed to construct new HttpHandler file content from {OriginalClassName} class at {_fullPath}");
}
DoCleanUp();
LogEnd();
// Http modules are turned into middleware and so we use a new middleware directory
var newRelativePath = FilePathHelper.RemoveDuplicateDirectories(Path.Combine(Constants.MiddlewareDirectoryName, FilePathHelper.AlterFileName(_relativePath, newFileName: className)));
// TODO: Potentially remove certain folders from beginning of relative path
var result = new[] { new FileInformation(newRelativePath, Encoding.UTF8.GetBytes(fileText)) };
return(Task.FromResult((IEnumerable <FileInformation>)result));
}
