57 lines
1.8 KiB
Kotlin
57 lines
1.8 KiB
Kotlin
import java.time.LocalDate
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import java.time.DayOfWeek
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import java.time.Month
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import java.time.format.DateTimeFormatter
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enum class Period {
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Autumn,
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Winter,
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Spring
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}
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fun period(thisYear: (Month) -> LocalDate, today: LocalDate): Period {
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return when {
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today.isBefore(thisYear(Month.FEBRUARY).plusDays(9)) -> Period.Winter
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today.isAfter(thisYear(Month.SEPTEMBER).minusDays(1)) -> Period.Autumn
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else -> Period.Spring
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}
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}
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fun week(p: Period, d: LocalDate): String {
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return when (p) {
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Period.Winter -> "Хороших праздников, удачной сессии!"
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else -> {
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if (d.dayOfWeek == DayOfWeek.SUNDAY) {
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"Сегодня воскресенье, лучше иди домой"
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} else {
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val (y, x0) = toWeekDate(d)
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val limit = if (p == Period.Spring) thisYear(Month.FEBRUARY).plusDays(9) else thisYear(Month.SEPTEMBER).plusDays(1)
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val (_, x1) = toWeekDate(limit)
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val limitIsSunday = limit.dayOfWeek == DayOfWeek.SUNDAY
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val x = 1 + x0 - x1 - if (limitIsSunday) 1 else 0
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"$x неделя"
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}
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}
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}
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}
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fun toWeekDate(date: LocalDate): Pair<Int, Int> {
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val weekOfYear = date.get(java.time.temporal.ChronoField.ALIGNED_WEEK_OF_YEAR)
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val year = date.year
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return Pair(year, weekOfYear.toInt())
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}
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fun thisYear(month: Month): LocalDate {
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val now = LocalDate.now()
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return LocalDate.of(now.year, month, 1)
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}
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fun main() {
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val today = LocalDate.now()
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val (year, _, _) = today.toGregorian()
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println(week(period(::thisYear, today), today))
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}
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fun LocalDate.toGregorian(): Triple<Int, Int, Int> {
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return Triple(this.year, this.monthValue, this.dayOfMonth)
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}
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