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Ingy döt Net 2024-10-16 18:07:41 -07:00
parent 81fd053722
commit 52a6ef48dd
10248 changed files with 63654 additions and 6775 deletions
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Task/French-Republican-calendar/Java/french-republican-calendar.java Normal file
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import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoUnit;
import java.util.ArrayList;
import java.util.List;
public final class FrenchRepublicanCalendar {
public static void main(String[] args) {
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("d MMMM yyyy");
List<String> gregorianStrings = List.of(
"22 September 1792", "20 May 1795", "15 July 1799", "23 September 1803", "31 December 1805" );
List<String> frenchRCStrings = new ArrayList<String>();
for ( String gregorianString : gregorianStrings ) {
LocalDate gregorianDate = LocalDate.parse(gregorianString, formatter);
FrenchRCDate frenchRCDate = FrenchRCDate.toFrenchRCDate(gregorianDate);
frenchRCStrings.addLast(frenchRCDate.toString());
System.out.println(gregorianString + " => " + frenchRCDate);
}
System.out.println();
for ( String frenchRCString : frenchRCStrings ) {
FrenchRCDate frenchRCDate = FrenchRCDate.parse(frenchRCString);
String gregorianDate = formatter.format(frenchRCDate.toGregorianDate());
System.out.println(frenchRCString + " => " + gregorianDate);
}
}
}
final class FrenchRCDate {
public FrenchRCDate(int aYear, int aMonth, int aDay) {
year = aYear; month = aMonth; day = aDay;
}
public LocalDate toGregorianDate() {
final int days = ( year - 1 ) * 365 + additionalDaysForYear(year) + ( month - 1 ) * 30 + day - 1;
return INTRODUCTION_DATE.plusDays(days);
}
public String toString() {
if ( month < 13 ) {
return day + " " + MONTHS.get(month - 1) + " " + year;
}
return SANSCULOTTIDES.get(day - 1) + " " + year;
}
public static FrenchRCDate toFrenchRCDate(LocalDate gregorianDate) {
final int daysBefore = (int) ChronoUnit.DAYS.between(gregorianDate, TERMINATION_DATE);
final int daysAfter = (int) ChronoUnit.DAYS.between(INTRODUCTION_DATE, gregorianDate);
if ( daysAfter < 0 || daysBefore < 0 ) {
throw new IllegalArgumentException("French Republican Calendar date out of range.");
}
int year = ( daysAfter + 366 ) / 365;
int days = ( daysAfter + 366 ) % 365 - additionalDaysForYear(year);
if ( days < 1 ) {
year -= 1;
days += 366;
}
if ( days < 361 ) {
return new FrenchRCDate(year, days / 30 + 1, days % 30);
}
return new FrenchRCDate(year, 13, days - 360);
}
public static FrenchRCDate parse(String frenchRCDate) {
String[] splits = frenchRCDate.split(" ");
if ( splits.length == 3 ) {
final int year = Integer.valueOf(splits[2]);
final int month = MONTHS.indexOf(splits[1]) + 1;
final int day = Integer.valueOf(splits[0]);
return new FrenchRCDate(year, month, day);
}
String yearString = splits[splits.length - 1];
final int year = Integer.valueOf(yearString);
String sansculottidesDay = frenchRCDate.substring(0, frenchRCDate.lastIndexOf(" "));
final int day = SANSCULOTTIDES.indexOf(sansculottidesDay) + 1;
return new FrenchRCDate(year, 13, day);
}
public static int additionalDaysForYear(int year) {
return ( year > 11 ) ? 3 : ( year > 7 ) ? 2 : ( year > 3 ) ? 1 : 0;
}
public static final LocalDate INTRODUCTION_DATE = LocalDate.of(1792, 9, 22);
public static final LocalDate TERMINATION_DATE = LocalDate.of(1805, 12, 31);
private int year, month, day;
private static final List<String> MONTHS = List.of(
"Vendémiaire", "Brumaire", "Frimaire", "Nivôse", "Pluviôse", "Ventôse", "Germinal",
"Floréal", "Prairial", "Messidor", "Thermidor", "Fructidor", "Sansculottide"
);
private static final List<String> SANSCULOTTIDES = List.of(
"Fête de la vertu", "Fête du génie", "Fête du travail",
"Fête de l'opinion", "Fête des récompenses", "Fête de la Révolution"
);
}