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use crate::datetime::{get_weekday_val, get_year_len, to_ordinal};
use crate::iter::masks::MASKS;
use crate::options::*;
use crate::utils::pymod;
use chrono::prelude::*;
#[derive(Debug)]
pub struct YearInfo {
pub yearlen: usize,
pub nextyearlen: usize,
pub yearordinal: isize,
pub yearweekday: usize,
pub mmask: &'static [usize],
pub mdaymask: &'static [isize],
pub nmdaymask: &'static [isize],
pub mrange: &'static [usize],
pub wdaymask: &'static [usize],
pub wnomask: Option<Vec<usize>>,
}
pub struct BaseMasks {
mmask: &'static [usize],
mdaymask: &'static [isize],
nmdaymask: &'static [isize],
mrange: &'static [usize],
wdaymask: &'static [usize],
}
fn base_year_masks(year: i32) -> BaseMasks {
// let masks = MASKS.clone();
let firstyday = Utc.ymd(year, 1, 1).and_hms_milli(0, 0, 0, 0);
let yearlen = get_year_len(year);
let wday = get_weekday_val(&firstyday.weekday()) as usize;
if yearlen == 365 {
return BaseMasks {
mmask: &MASKS.m365,
mdaymask: &MASKS.mday365,
nmdaymask: &MASKS.nmday365,
mrange: &MASKS.m365range,
wdaymask: &MASKS.wday[wday..],
};
}
BaseMasks {
mmask: &MASKS.m366,
mdaymask: &MASKS.mday366,
nmdaymask: &MASKS.nmday366,
mrange: &MASKS.m366range,
wdaymask: &MASKS.wday[wday..],
}
}
pub fn rebuild_year(year: i32, options: &ParsedOptions) -> YearInfo {
let firstyday = Utc.ymd(year, 1, 1).and_hms_milli(0, 0, 0, 0);
let yearlen = get_year_len(year);
let nextyearlen = get_year_len(year + 1);
let yearordinal = to_ordinal(&firstyday);
let yearweekday = get_weekday_val(&firstyday.weekday());
let base_masks = base_year_masks(year);
let mut result = YearInfo {
yearlen,
nextyearlen,
yearordinal,
yearweekday,
wnomask: None,
mmask: base_masks.mmask,
mdaymask: base_masks.mdaymask,
nmdaymask: base_masks.nmdaymask,
mrange: base_masks.mrange,
wdaymask: base_masks.wdaymask,
};
if options.byweekno.is_empty() {
return result;
}
let mut wnomask = vec![0; yearlen + 7];
let wyearlen;
let mut no1wkst = pymod((7 - yearweekday + options.wkst) as isize, 7);
let firstwkst = no1wkst;
if no1wkst >= 4 {
no1wkst = 0;
// Number of days in the year, plus the days we got
// from last year.
wyearlen = result.yearlen as isize + pymod(yearweekday as isize - options.wkst as isize, 7);
} else {
// Number of days in the year, minus the days we
// left in last year.
wyearlen = yearlen as isize - no1wkst;
}
let div = (wyearlen as f32 / 7.).floor() as isize;
let year_mod = pymod(wyearlen, 7);
//const numweeks = Math.floor(div + mod / 4)
let numweeks = div + (year_mod / 4);
for j in 0..options.byweekno.len() {
let mut n = options.byweekno[j];
if n < 0 {
n += (numweeks + 1) as isize;
}
if !(n > 0 && n <= numweeks) {
continue;
}
let mut i;
if n > 1 {
i = no1wkst + (n - 1) * 7;
if no1wkst != firstwkst {
i -= 7 - firstwkst;
}
} else {
i = no1wkst;
}
for _ in 0..7 {
wnomask[i as usize] = 1;
i += 1;
if result.wdaymask[i as usize] as usize == options.wkst {
break;
}
}
}
if options.byweekno.iter().any(|&wkno| wkno == 1) {
// Check week number 1 of next year as well
// orig-TODO : Check -numweeks for next year.
let mut i = no1wkst + numweeks * 7;
if no1wkst != firstwkst {
i -= 7 - firstwkst;
}
if i < yearlen as isize {
// If week starts in next year, we
// don't care about it.
for _ in 0..7 {
wnomask[i as usize] = 1;
i += 1;
if result.wdaymask[i as usize] as usize == options.wkst {
break;
}
}
}
}
if no1wkst > 0 {
// Check last week number of last year as
// well. If no1wkst is 0, either the year
// started on week start, or week number 1
// got days from last year, so there are no
// days from last year's last week number in
// this year.
let lnumweeks;
if !options.byweekno.iter().any(|&weekno| weekno == -1) {
let lyearweekday = get_weekday_val(&Utc.ymd(year - 1, 1, 1).weekday());
let lno1wkst = pymod((7 - lyearweekday + options.wkst) as isize, 7);
let lyearlen = get_year_len(year - 1);
let weekst;
if lno1wkst >= 4 {
//lno1wkst = 0;
weekst = lyearlen as isize + pymod((lyearweekday - options.wkst) as isize, 7);
} else {
weekst = yearlen as isize - no1wkst;
}
lnumweeks = 52 + (pymod(weekst, 7) / 4) as isize;
} else {
lnumweeks = -1 as isize;
}
if options.byweekno.iter().any(|&weekno| weekno == lnumweeks) {
for i in 0..no1wkst {
wnomask[i as usize] = 1;
}
}
}
result.wnomask = Some(wnomask);
result
}
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