i20n and universalization for config

mirea-specific/weekday.kt

@@ -0,0 +1,52 @@
+import java.time.DayOfWeek
+import java.time.LocalDate
+import java.time.Month
+
+enum class Period {
+    Autumn,
+    Winter,
+    Spring
+}
+
+fun determinePeriod(today: LocalDate): Period {
+    val februaryCutoff = LocalDate.of(today.year, Month.FEBRUARY, 9)
+    val septemberCutoff = LocalDate.of(today.year, Month.SEPTEMBER, 1)
+
+    return when {
+        today.isBefore(februaryCutoff) -> Period.Winter
+        today.isAfter(septemberCutoff.minusDays(1)) -> Period.Autumn
+        else -> Period.Spring
+    }
+}
+
+fun calculateWeek(period: Period, date: LocalDate): String {
+    return when {
+        period == Period.Winter -> "Хороших праздников, удачной сессии!"
+        date.dayOfWeek == DayOfWeek.SUNDAY -> "Сегодня воскресенье, лучше иди домой"
+        else -> {
+            val currentWeek = date.getWeekOfYear()
+            val periodLimit = when (period) {
+                Period.Spring -> LocalDate.of(date.year, Month.FEBRUARY, 9)
+                Period.Autumn -> LocalDate.of(date.year, Month.SEPTEMBER, 1)
+                else -> throw IllegalStateException("Unexpected period")
+            }
+            val limitWeek = periodLimit.getWeekOfYear()
+            val isLimitSunday = periodLimit.dayOfWeek == DayOfWeek.SUNDAY
+
+            val weekOffset = if (isLimitSunday) 1 else 0
+            val weekNumber = 1 + currentWeek - limitWeek - weekOffset
+            "$weekNumber неделя"
+        }
+    }
+}
+
+fun LocalDate.getWeekOfYear(): Int {
+    return this.get(java.time.temporal.ChronoField.ALIGNED_WEEK_OF_YEAR)
+}
+
+fun main() {
+    val today = LocalDate.now()
+    val period = determinePeriod(today)
+    val weekInfo = calculateWeek(period, today)
+    println(weekInfo)
+}