180 lines
7.9 KiB
Rust
180 lines
7.9 KiB
Rust
use chrono;
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use chrono::prelude::*;
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use serde_derive::{Deserialize, Serialize};
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use serde_json;
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use std::collections::HashMap;
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// http://astropixels.com/ephemeris/soleq2001.html
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const SOLSTICE_TEXT: &'static str = "
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2001 Mar 20 13:31 Jun 21 07:38 Sep 22 23:05 Dec 21 19:22
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2002 Mar 20 19:16 Jun 21 13:25 Sep 23 04:56 Dec 22 01:15
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2003 Mar 21 01:00 Jun 21 19:11 Sep 23 10:47 Dec 22 07:04
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2004 Mar 20 06:49 Jun 21 00:57 Sep 22 16:30 Dec 21 12:42
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2005 Mar 20 12:34 Jun 21 06:46 Sep 22 22:23 Dec 21 18:35
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2006 Mar 20 18:25 Jun 21 12:26 Sep 23 04:04 Dec 22 00:22
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2007 Mar 21 00:07 Jun 21 18:06 Sep 23 09:51 Dec 22 06:08
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2008 Mar 20 05:49 Jun 21 00:00 Sep 22 15:45 Dec 21 12:04
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2009 Mar 20 11:44 Jun 21 05:45 Sep 22 21:18 Dec 21 17:47
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2010 Mar 20 17:32 Jun 21 11:28 Sep 23 03:09 Dec 21 23:38
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2011 Mar 20 23:21 Jun 21 17:16 Sep 23 09:05 Dec 22 05:30
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2012 Mar 20 05:15 Jun 20 23:08 Sep 22 14:49 Dec 21 11:12
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2013 Mar 20 11:02 Jun 21 05:04 Sep 22 20:44 Dec 21 17:11
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2014 Mar 20 16:57 Jun 21 10:52 Sep 23 02:30 Dec 21 23:03
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2015 Mar 20 22:45 Jun 21 16:38 Sep 23 08:20 Dec 22 04:48
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2016 Mar 20 04:31 Jun 20 22:35 Sep 22 14:21 Dec 21 10:45
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2017 Mar 20 10:29 Jun 21 04:25 Sep 22 20:02 Dec 21 16:29
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2018 Mar 20 16:15 Jun 21 10:07 Sep 23 01:54 Dec 21 22:22
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2019 Mar 20 21:58 Jun 21 15:54 Sep 23 07:50 Dec 22 04:19
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2020 Mar 20 03:50 Jun 20 21:43 Sep 22 13:31 Dec 21 10:03
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2021 Mar 20 09:37 Jun 21 03:32 Sep 22 19:21 Dec 21 15:59
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2022 Mar 20 15:33 Jun 21 09:14 Sep 23 01:04 Dec 21 21:48
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2023 Mar 20 21:25 Jun 21 14:58 Sep 23 06:50 Dec 22 03:28
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2024 Mar 20 03:07 Jun 20 20:51 Sep 22 12:44 Dec 21 09:20
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2025 Mar 20 09:02 Jun 21 02:42 Sep 22 18:20 Dec 21 15:03
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2026 Mar 20 14:46 Jun 21 08:25 Sep 23 00:06 Dec 21 20:50
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2027 Mar 20 20:25 Jun 21 14:11 Sep 23 06:02 Dec 22 02:43
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2028 Mar 20 02:17 Jun 20 20:02 Sep 22 11:45 Dec 21 08:20
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2029 Mar 20 08:01 Jun 21 01:48 Sep 22 17:37 Dec 21 14:14
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2030 Mar 20 13:51 Jun 21 07:31 Sep 22 23:27 Dec 21 20:09
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2031 Mar 20 19:41 Jun 21 13:17 Sep 23 05:15 Dec 22 01:56
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2032 Mar 20 01:23 Jun 20 19:09 Sep 22 11:11 Dec 21 07:57
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2033 Mar 20 07:23 Jun 21 01:01 Sep 22 16:52 Dec 21 13:45
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2034 Mar 20 13:18 Jun 21 06:45 Sep 22 22:41 Dec 21 19:35
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2035 Mar 20 19:03 Jun 21 12:33 Sep 23 04:39 Dec 22 01:31
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2036 Mar 20 01:02 Jun 20 18:31 Sep 22 10:23 Dec 21 07:12
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2037 Mar 20 06:50 Jun 21 00:22 Sep 22 16:13 Dec 21 13:08
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2038 Mar 20 12:40 Jun 21 06:09 Sep 22 22:02 Dec 21 19:01
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2039 Mar 20 18:32 Jun 21 11:58 Sep 23 03:50 Dec 22 00:41
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2040 Mar 20 00:11 Jun 20 17:46 Sep 22 09:44 Dec 21 06:33
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2041 Mar 20 06:07 Jun 20 23:37 Sep 22 15:27 Dec 21 12:19
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2042 Mar 20 11:53 Jun 21 05:16 Sep 22 21:11 Dec 21 18:04
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2043 Mar 20 17:29 Jun 21 10:59 Sep 23 03:07 Dec 22 00:02
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2044 Mar 19 23:20 Jun 20 16:50 Sep 22 08:47 Dec 21 05:43
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2045 Mar 20 05:08 Jun 20 22:34 Sep 22 14:33 Dec 21 11:36
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2046 Mar 20 10:58 Jun 21 04:15 Sep 22 20:22 Dec 21 17:28
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2047 Mar 20 16:52 Jun 21 10:02 Sep 23 02:07 Dec 21 23:07
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2048 Mar 19 22:34 Jun 20 15:54 Sep 22 08:01 Dec 21 05:02
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2049 Mar 20 04:28 Jun 20 21:47 Sep 22 13:42 Dec 21 10:51
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2050 Mar 20 10:20 Jun 21 03:33 Sep 22 19:29 Dec 21 16:39
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";
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#[derive(Clone, Copy, Debug, Serialize, Deserialize)]
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pub struct YearlyEvents {
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pub year: i32,
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pub spring_equinox: chrono::DateTime<chrono::Utc>,
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pub summer_solstice: chrono::DateTime<chrono::Utc>,
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pub autumn_equinox: chrono::DateTime<chrono::Utc>,
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pub winter_solstice: chrono::DateTime<chrono::Utc>,
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}
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#[derive(Clone, Copy, Debug, Serialize, Deserialize)]
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pub enum Event {
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SpringEquinox(chrono::DateTime<chrono::Utc>),
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SummerSolstice(chrono::DateTime<chrono::Utc>),
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AutumnEquinox(chrono::DateTime<chrono::Utc>),
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WinterSolstice(chrono::DateTime<chrono::Utc>),
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}
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impl Event {
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pub fn date(&self) -> chrono::DateTime<chrono::Utc> {
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match *self {
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Event::SpringEquinox(d) => d,
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Event::SummerSolstice(d) => d,
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Event::AutumnEquinox(d) => d,
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Event::WinterSolstice(d) => d,
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}
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}
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}
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fn parse_time<'a>(
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jaro: &str,
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iter: impl Iterator<Item = &'a str>,
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) -> chrono::DateTime<chrono::Utc> {
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let partoj = iter.collect::<Vec<&str>>();
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let p = format!("{} {} {} {}", jaro, partoj[0], partoj[1], partoj[2]);
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chrono::Utc.datetime_from_str(&p, "%Y %b %d %H:%M").unwrap()
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}
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fn parse_line(year: &str, rest: &[&str]) -> YearlyEvents {
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let spring = parse_time(year, rest.iter().take(3).cloned());
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let summer = parse_time(year, rest.iter().skip(3).take(3).cloned());
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let autumn = parse_time(year, rest.iter().skip(6).take(3).cloned());
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let winter = parse_time(year, rest.iter().skip(9).take(3).cloned());
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YearlyEvents {
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year: year.parse::<i32>().unwrap(),
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spring_equinox: spring,
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summer_solstice: summer,
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autumn_equinox: autumn,
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winter_solstice: winter,
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}
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}
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fn parse_events() -> Vec<Option<YearlyEvents>> {
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SOLSTICE_TEXT
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.lines()
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.map(|line| {
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match line
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.split(" ")
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.filter(|elem| !elem.is_empty())
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.collect::<Vec<&str>>()
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.as_slice()
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{
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[year, rest @ ..] => Some(parse_line(year, rest)),
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_ => None,
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}
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})
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.collect()
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}
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pub struct Solstices(HashMap<i32, YearlyEvents>);
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impl Solstices {
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pub fn akiru(&self, year: i32) -> Option<YearlyEvents> {
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self.0.get(&year).map(|c| c.clone())
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}
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pub fn next_event(&self, date: chrono::DateTime<chrono::Utc>) -> Option<Event> {
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let year_events = self.0.get(&date.year());
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match year_events {
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Some(year_events) => {
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if date <= year_events.spring_equinox {
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Some(Event::SpringEquinox(year_events.spring_equinox.clone()))
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} else if date <= year_events.summer_solstice {
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Some(Event::SummerSolstice(year_events.summer_solstice.clone()))
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} else if date <= year_events.autumn_equinox {
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Some(Event::AutumnEquinox(year_events.autumn_equinox.clone()))
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} else if date <= year_events.winter_solstice {
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Some(Event::WinterSolstice(year_events.winter_solstice.clone()))
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} else {
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self.0
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.get(&(date.year() + 1))
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.map(|events| Event::SpringEquinox(year_events.spring_equinox.clone()))
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}
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}
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None => None,
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}
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}
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}
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impl From<Vec<Option<YearlyEvents>>> for Solstices {
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fn from(event_list: Vec<Option<YearlyEvents>>) -> Self {
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Solstices(event_list.iter().fold(HashMap::new(), |mut m, record| {
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match record {
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Some(record) => {
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m.insert(record.year, record.clone());
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}
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None => (),
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}
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m
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}))
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}
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}
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lazy_static! {
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pub static ref EVENTS: Solstices = Solstices::from(parse_events());
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}
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