public static IPhaseResult <TMapped> Map <TResult, TMapped>(
this IPhaseResult <TResult> source,
Func <TResult, TMapped> onFinalValue)
{
return(source switch
{
Finished <TResult> finished => onFinalValue(finished.Value).AsFinished(),
Cancelled <TResult> => PhaseResult.NeedsRetry <TMapped>(),
NeedsRetry <TResult> => PhaseResult.NeedsRetry <TMapped>(),
_ => throw new Exception()
});
public static async Task <IPhaseResult <TResult> > HandlePhase <TResult>(
PhaseMethod <TResult> logic)
{
while (true)
{
switch (await logic.Invoke())
{
case Finished <TResult> finished: return(finished);
case Cancelled <TResult> : return(PhaseResult.NeedsRetry <TResult>());
}
}
}