public override OperationResult Perform()
{
var result = OperationResult.Success;
if (Context.Next.Settings.SessionMode == SessionMode.Server)
{
logger.Info("Initializing server...");
StatusChanged?.Invoke(TextKey.OperationStatus_InitializeServer);
server.Initialize(Context.Next.Settings.Server);
var(abort, fallback, success) = TryPerformWithFallback(() => server.Connect());
if (success)
{
(abort, fallback, success) = TryPerformWithFallback(() => server.GetAvailableExams(Context.Next.Settings.Server.ExamId), out var exams);
if (success)
{
var exam = default(Exam);
if (!string.IsNullOrWhiteSpace(Context.Next.Settings.Server.ExamId))
{
exam = exams.First();
logger.Info("Automatically selected exam as defined in configuration.");
}
else
{
success = TrySelectExam(exams, out exam);
}
if (success)
{
(abort, fallback, success) = TryPerformWithFallback(() => server.GetConfigurationFor(exam), out var uri);
if (success)
{
var info = server.GetConnectionInfo();
var status = TryLoadSettings(uri, UriSource.Server, out _, out var settings);
fileSystem.Delete(uri.LocalPath);
if (status == LoadStatus.Success)
{
var serverSettings = Context.Next.Settings.Server;
Context.Next.AppConfig.ServerApi = info.Api;
Context.Next.AppConfig.ServerConnectionToken = info.ConnectionToken;
Context.Next.AppConfig.ServerExamId = exam.Id;
Context.Next.AppConfig.ServerOauth2Token = info.Oauth2Token;
Context.Next.Settings = settings;
Context.Next.Settings.Browser.StartUrl = exam.Url;
Context.Next.Settings.Server = serverSettings;
Context.Next.Settings.SessionMode = SessionMode.Server;
result = OperationResult.Success;
}
else
{
result = OperationResult.Failed;
}
}
}
else
{
logger.Info("The user aborted the exam selection.");
result = OperationResult.Aborted;
}
}
}
if (abort)
{
result = OperationResult.Aborted;
}
if (fallback)
{
Context.Next.Settings.SessionMode = SessionMode.Normal;
result = OperationResult.Success;
}
}
return(result);
}