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use chrono::{Datelike, NaiveDate};
/// Represents all regions and their public holidays within Germany.
///
/// Holidays guaranteed to take place on sundays, e.g. easter sunday, are excluded by default.
/// However, holidays with a fixed date can still fall on a sunday.
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
pub enum GermanRegion {
BadenWuerttemberg,
/// * The Augsburger Friedensfest only applies to Augsburg.
/// It is excluded by default, but can be calculated via `GermanHoliday::AugsburgerFriedensfest`.
/// * Mariä Himmelfahrt only applies to communities with a catholic majority.
/// Since this is the case in the majority of communities, it is included by default.
Bayern,
Berlin,
Brandenburg,
Bremen,
Hamburg,
Hessen,
MechlenburgVorpommern,
Niedersachsen,
NordrheinWestfalen,
RheinlandPfalz,
Saarland,
/// Fronleichnam applies only to a minority of communities and has been excluded by default.
/// It can be manually calculated via `GermanHoliday::Fronleichnam`.
Sachsen,
SachsenAnhalt,
SchleswigHolstein,
/// Fronleichnam applies only to a minority of communities and has been excluded by default.
/// It can be manually calculated via `GermanHoliday::Fronleichnam`.
Thueringen,
}
use crate::holidays::GermanHoliday;
use crate::holidays::GermanHoliday::*;
use crate::regions::GermanRegion::*;
impl GermanRegion {
/// Returns all public holidays in the given year.
/// Holidays guaranteed to take place on sundays, e.g. easter sunday, are excluded by default.
///
/// For years before 1995 this list will be empty.
pub fn holidays_in_year(&self, year: i32) -> Vec<GermanHoliday> {
if year < 1995 {
return Vec::new();
}
let mut holidays = Vec::new();
holidays.extend_from_slice(BUNDESWEITE_FEIERTAGE);
holidays.extend_from_slice(self.region_specific_holidays(year));
if year == 2017 && !holidays.contains(&Reformationstag) {
// BW: https://www.landesrecht-bw.de/perma?d=jlr-FeiertGBWV1P1a
// BY: https://www.bayern.landtag.de/www/ElanTextAblage_WP17/Drucksachen/Folgedrucksachen/0000007000/0000007463.pdf
// BE: https://gesetze.berlin.de/bsbe/document/aiz-jlr-FeiertGBErahmen%4020151025/part/x
// HE: https://www.rv.hessenrecht.hessen.de/bshe/document/jlr-RefT2017VHErahmen/part/X
// NW: https://www.landtag.nrw.de/portal/WWW/dokumentenarchiv/Dokument?Id=XMMGVB1528%7C496%7C496
// RP: https://web.archive.org/web/20160305005630/https://www.rlp.de/fr/aktuelles/einzelansicht/news/detail/News/zusaetzlicher-feiertag-2017/
// SL: https://web.archive.org/web/20160306062414/http://sl.juris.de/cgi-bin/landesrecht.py?d=http%3A%2F%2Fsl.juris.de%2Fsl%2Fgesamt%2FRefT2017V_SL.htm
holidays.push(Reformationstag);
}
holidays
}
fn region_specific_holidays(&self, year: i32) -> &'static [GermanHoliday] {
match self {
BadenWuerttemberg => &[HeiligeDreiKoenige, Fronleichnam, Allerheiligen],
Bayern => &[
HeiligeDreiKoenige,
Fronleichnam,
MariaeHimmelfahrt,
Allerheiligen,
],
Berlin => {
if year == 2020 || year == 2025 {
// 2020: https://gesetze.berlin.de/bsbe/document/aiz-jlr-FeiertGBErahmen%4020190207
// 2025: https://gesetze.berlin.de/bsbe/document/jlr-FeiertGBErahmen
&[Frauentag, TagDerBefreiung]
} else if year == 2028 {
// https://gesetze.berlin.de/bsbe/document/aiz-jlr-FeiertGBErahmen%4020250509
&[Frauentag, SiebzehnterJuni]
} else if year >= 2019 {
&[Frauentag]
} else {
&[]
}
}
Brandenburg => &[Reformationstag],
Bremen => {
if year >= 2017 {
&[Reformationstag]
} else {
&[]
}
}
Hamburg => {
if year >= 2017 {
&[Reformationstag]
} else {
&[]
}
}
Hessen => &[Fronleichnam],
MechlenburgVorpommern => {
if year >= 2023 {
&[Frauentag, Reformationstag]
} else {
&[Reformationstag]
}
}
Niedersachsen => {
if year >= 2017 {
&[Reformationstag]
} else {
&[]
}
}
NordrheinWestfalen => &[Fronleichnam, Allerheiligen],
RheinlandPfalz => &[Fronleichnam, Allerheiligen],
Saarland => &[Fronleichnam, MariaeHimmelfahrt, Allerheiligen],
Sachsen => &[Reformationstag, BussUndBettag],
SachsenAnhalt => &[HeiligeDreiKoenige, Reformationstag],
SchleswigHolstein => {
if year >= 2017 {
&[Reformationstag]
} else {
&[]
}
}
Thueringen => {
if year >= 2019 {
&[Weltkindertag, Reformationstag]
} else {
&[Reformationstag]
}
}
}
}
/// Returns all holidays and their dates in the given year.
/// Holidays guaranteed to take place on sundays, e.g. easter sunday, are excluded by default.
///
/// For years before 1995 this list will be empty.
pub fn holiday_dates_in_year(&self, year: i32) -> Vec<(NaiveDate, GermanHoliday)> {
let mut holiday_dates: Vec<(NaiveDate, GermanHoliday)> = self
.holidays_in_year(year)
.into_iter()
.flat_map(|holiday| holiday.date(year).map(|date| (date, holiday)))
.collect();
holiday_dates.sort_unstable_by_key(|(date, _)| *date);
holiday_dates
}
/// Checks if a given date is a public holiday in the specific region.
///
/// Always `false` for dates before 1995.
pub fn is_holiday(&self, date: NaiveDate) -> bool {
self.holiday_from_date(date).is_some()
}
/// Returns the holiday for a specific date if the date is a holiday in the specific region.
///
/// Always `None` for dates before 1995.
pub fn holiday_from_date(&self, date: NaiveDate) -> Option<GermanHoliday> {
self.holidays_in_year(date.year())
.into_iter()
.find(|holiday| holiday.date(date.year()) == Some(date))
}
}
const BUNDESWEITE_FEIERTAGE: &'static [GermanHoliday] = &[
Neujahr,
Karfreitag,
Ostermontag,
ErsterMai,
ChristiHimmelfahrt,
Pfingstmontag,
TagDerDeutschenEinheit,
ErsterWeihnachtsfeiertag,
ZweiterWeihnachtsfeiertag,
];
#[cfg(test)]
mod tests {
use crate::regions::GermanHoliday::*;
use crate::regions::GermanRegion;
use crate::regions::GermanRegion::*;
use crate::DateExt;
use chrono::NaiveDate;
use proptest::prelude::*;
#[test]
fn singular_example_holiday() {
let date = NaiveDate::from_ymd(2018, 1, 1);
assert!(date.is_public_holiday_in(Bayern));
assert_eq!(Some(Neujahr), date.public_holiday_in(Bayern));
}
proptest! {
#[test]
fn total_number_holidays(year in 2023i32..) {
let number_holidays = |region: GermanRegion| region.holidays_in_year(year).len();
assert_eq!(12, number_holidays(BadenWuerttemberg));
assert_eq!(13, number_holidays(Bayern));
assert_eq!(10, number_holidays(Berlin));
assert_eq!(10, number_holidays(Brandenburg));
assert_eq!(10, number_holidays(Bremen));
assert_eq!(10, number_holidays(Hamburg));
assert_eq!(10, number_holidays(Hessen));
assert_eq!(11, number_holidays(MechlenburgVorpommern));
assert_eq!(10, number_holidays(Niedersachsen));
assert_eq!(11, number_holidays(NordrheinWestfalen));
assert_eq!(11, number_holidays(RheinlandPfalz));
assert_eq!(12, number_holidays(Saarland));
assert_eq!(11, number_holidays(Sachsen));
assert_eq!(11, number_holidays(SachsenAnhalt));
assert_eq!(10, number_holidays(SchleswigHolstein));
assert_eq!(11, number_holidays(Thueringen));
}
}
#[test]
fn frauentag_in_berlin_since_2019() {
assert!(!Berlin.holidays_in_year(2018).contains(&Frauentag));
assert_eq!(
None,
NaiveDate::from_ymd(2018, 3, 8).public_holiday_in(Berlin)
);
assert!(Berlin.holidays_in_year(2019).contains(&Frauentag));
assert_eq!(
Some(Frauentag),
NaiveDate::from_ymd(2019, 3, 8).public_holiday_in(Berlin)
);
}
proptest! {
#[test]
fn only_provide_holidays_after_1995(year in -2999i32..1995) {
assert!(BadenWuerttemberg.holidays_in_year(year).is_empty());
}
}
}