/// <summary>
/// This step is used to locate any code artifacts within the Web Forms application that inherit from HttpApplication in order to alter
/// any of the default behavior of IIS. Any code found will be copied and moved into the end of the blazor target projects Startup.cs file definition.
/// </summary>
/// <param name="webFormProjectData">Pre cached project data about the web forms project.</param>
/// <param name="webFormProject">The web forms project that we are migrating data from.</param>
/// <param name="blazorServerProject">The blazor server project this is being migrated to.</param>
private async Task MigrateStartupAsync(IReadOnlyList <VsModel> webFormProjectData, VsProject webFormProject, VsProject blazorServerProject)
{
try
{
//Informing the dialog the migration step has started.
await _statusTracking.UpdateStepStatusAsync(MigrationStepEnum.Startup, MigrationStatusEnum.Running);
//Find class(es) that inherit HttpApplication
var startupClasses = webFormProjectData.GetClassesThatInheritBase("HttpApplication");
if (!startupClasses.Any())
{
//No startup classes were found updating the hosting dialog to inform the user there was nothing to convert in the startup process.
await _statusTracking.UpdateCurrentStatusAsync(MigrationStepEnum.Startup, MessageTypeEnum.Information, $"No classes were found in {webFormProject.Name} that inherit from 'HttpApplication'");
await _statusTracking.UpdateStepStatusAsync(MigrationStepEnum.Startup, MigrationStatusEnum.Passed);
return;
}
var blazorStartupClass = await blazorServerProject.FindClassAsync("Startup", false);
if (blazorStartupClass == null)
{
//No startup class was found in the blazor server project. Cannot update the startup class. Informing the user and failing the step
await _statusTracking.UpdateCurrentStatusAsync(MigrationStepEnum.Startup, MessageTypeEnum.Warning, $"The target project {blazorServerProject.Name} does not have definition for a Startup class ('public class Startup').");
await _statusTracking.UpdateStepStatusAsync(MigrationStepEnum.Startup, MigrationStatusEnum.Failed);
return;
}
//Get the methods
//Copy them into the blazorStartupClass commented out.
foreach (var source in startupClasses)
{
//loading the class data
var sourceClass = source.Classes.FirstOrDefault();
//If no class was found continue the process.
if (sourceClass == null)
{
continue;
}
//double loop - I do not like this and it needs to be refactored.
foreach (var method in sourceClass.Methods)
{
await blazorStartupClass.AddToEndAsync(blazorStartupClass.SourceFiles.First(), $"\r\n/*{method.FormatCSharpDeclarationSyntax()}\r\n{{ { await method.GetBodySyntaxAsync()} \r\n}}*/");
await _statusTracking.UpdateCurrentStatusAsync(MigrationStepEnum.Startup, MessageTypeEnum.Information, $"Class: {sourceClass.Name} Method: {method.Name} has been copied into the Startup.cs class commented out. Please refactor manually.");
}
}
//All items process updating the status of the step has passed.
await _statusTracking.UpdateStepStatusAsync(MigrationStepEnum.Startup, MigrationStatusEnum.Passed);
}
catch (Exception unhandledError)
{
//Dumping the exception that occured directly into the status so the user can see what happened.
await _statusTracking.UpdateCurrentStatusAsync(MigrationStepEnum.Startup, MessageTypeEnum.Error, $"The following unhandled error occured. '{unhandledError.Message}'");
//Updating the status that the step failed
await _statusTracking.UpdateStepStatusAsync(MigrationStepEnum.Startup, MigrationStatusEnum.Failed);
}
}
