interface Activity

data class FullActivity(
	val startTime: LocalDateTime,
	val endTime: LocalDateTime,
	val directTime: Int,
	val indirectTime: Int,
	val travelTime: Int,
	val quantity: Int
) : Activity

data class SpecificActivity(
	val executionTime: LocalDateTime,
	val quantity: Int,
	val duration: Duration
) : Activity

fun FullActivity.toSpecificActivity() =
	SpecificActivity(
		startTime,
		quantity,
		Duration.between(startTime, endTime)
	)

val specificView: SpecificActivity = FullActivity(
	startTime = LocalDateTime.now(),
	endTime = LocalDateTime.now().plusMinutes(10),
	quantity = 3,
	directTime = 15,
	indirectTime = 16,
	travelTime = 10
).toSpecificActivity()