65 lines
1.8 KiB
Java
65 lines
1.8 KiB
Java
package hu.filc.naplo.utils;
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import java.time.DayOfWeek;
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import java.time.Duration;
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import java.time.LocalDate;
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public class Week {
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private final LocalDate start;
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private final LocalDate end;
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private Week(LocalDate start, LocalDate end) {
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this.start = start;
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this.end = end;
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}
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public static Week current() {
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return fromDate(LocalDate.now());
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}
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public static Week fromId(int id) {
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LocalDate _now = getYearStart().plusDays(id * 7L);
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return new Week(_now.minusDays(_now.getDayOfWeek().getValue() - 1), _now.plusDays(7 - _now.getDayOfWeek().getValue()));
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}
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public static Week fromDate(LocalDate date) {
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return new Week(date.minusDays(date.getDayOfWeek().getValue() - 1), date.plusDays(7 - date.getDayOfWeek().getValue()));
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}
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public Week next() {
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return Week.fromDate(start.plusDays(8));
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}
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public int id() {
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return (int) Math.ceil(Duration.between(getYearStart().atStartOfDay(), start.atStartOfDay()).toDays() / 7f);
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}
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private static LocalDate getYearStart() {
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LocalDate now = LocalDate.now();
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LocalDate start = getYearStart(now.getYear());
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return start.isBefore(now) ? start : getYearStart(now.getYear() -1);
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}
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private static LocalDate getYearStart(int year) {
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LocalDate time = LocalDate.of(year, 9, 1);
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if (time.getDayOfWeek() == DayOfWeek.SATURDAY)
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return time.plusDays(2);
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else if (time.getDayOfWeek() == DayOfWeek.SUNDAY)
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return time.plusDays(1);
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return time;
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}
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@Override
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public boolean equals(Object o) {
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if (this == o) return true;
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if (o == null || getClass() != o.getClass()) return false;
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Week week = (Week) o;
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return this.id() == week.id();
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}
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@Override
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public int hashCode() {
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return id();
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}
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} |