private async Task <StepResult> ExecuteStep(StepParameters lastParameters, Type operationToExec)
{
if (!_steps.ContainsKey(operationToExec))
{
throw new Exception($"Операция {operationToExec} не зарегистрированна");
}
var step = _steps[operationToExec];
StepParameters newParameters;
var stepParametersType = step.GetParametersType();
var lastParametersType = lastParameters.GetType();
if (lastParametersType == stepParametersType)
{
newParameters = lastParameters;
}
else
{
newParameters = (StepParameters)_mapper.Map(lastParameters, lastParametersType, stepParametersType);
}
var methodInfo = step.GetType().GetMethod("Execute");
var methodResult = (Task <StepResult>)methodInfo.Invoke(step, new [] { newParameters });
var result = await methodResult;
result.LastParameters = newParameters;
return(result);
}
/// <summary>
/// Вызывает соответствующий метод с конечным результатом.
/// </summary>
private void Invoke(Type lastOperation, StepParameters parameters)
{
if (_actions.ContainsKey(lastOperation))
{
_actions[lastOperation].DynamicInvoke(parameters);
}
}
/// <summary>
/// Стартует рабочий поток на испольнение.
/// </summary>
/// <param name="parameters">Параметры запуска первого шага.</param>
/// <returns>Завершающий шаг.</returns>
public async Task <WorkflowResult> Start <TParameters>(TParameters parameters)
{
if (_registrator == null || _registrator.IsEmpty())
{
throw new Exception("Необходимо инициализировать шаги");
}
bool isFinish = false;
Type lastOperation = _registrator.MoveFirst();
var step = _steps[lastOperation];
StepParameters lastParameters =
(StepParameters)_mapper.Map(parameters, parameters.GetType(), step.GetParametersType());
do
{
var internalIsFinish = _registrator.IsFinish();
lastOperation = _registrator.GetNext();
var result = await ExecuteStep(lastParameters, lastOperation);
if (result.Direction == StepDirection.Finish)
{
isFinish = true;
}
else if (result.Direction == StepDirection.ToStep)
{
_registrator.MoveTo(result.ToStep);
}
else if (result.Direction == StepDirection.ToStepAndFinish)
{
isFinish = true;
lastOperation = result.ToStep;
result = await ExecuteStep(result.LastParameters, result.ToStep);
}
else if (result.Direction == StepDirection.Next)
{
if (internalIsFinish)
{
isFinish = true;
}
}
lastParameters = result.LastParameters;
} while (!isFinish);
WorkflowResult workflow = new WorkflowResult();
workflow.Parameters = lastParameters;
workflow.LastOperation = lastOperation;
Invoke(lastOperation, lastParameters);
return(workflow);
}
