static PerformanceCalculator CreatePerformanceCalculator(Invoice.Performance performance, Plays.Play play)
{
return(play.Type switch
{
"tragedy" => new TragedyCalculator(performance),
"comedy" => new ComedyCalculator(performance),
_ => throw new Exception($"Unknown type: {play.Type}")
});
protected PerformanceCalculator(Invoice.Performance performance)
{
Performance = performance;
}
public ComedyCalculator(Invoice.Performance performance)
: base(performance)
{
}