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|
use crate::iter::{
build_poslist, increment_counter_date, make_timeset, remove_filtered_days, IterInfo,
};
use crate::{datetime::from_ordinal, RRule};
use crate::{datetime::Time, Frequenzy};
use chrono::prelude::*;
use chrono_tz::Tz;
pub struct RRuleIter {
pub counter_date: DateTime<Tz>,
pub ii: IterInfo,
pub timeset: Vec<Time>,
pub remain: Vec<DateTime<Tz>>,
pub finished: bool,
}
impl Iterator for RRuleIter {
type Item = DateTime<Tz>;
fn next(&mut self) -> Option<Self::Item> {
if self.finished {
return None;
}
if !self.remain.is_empty() {
return Some(self.remain.remove(0));
}
generate(self);
// println!("Done generating: {:?}", self.remain);
if self.remain.is_empty() {
self.finished = true;
None
} else {
Some(self.remain.remove(0))
}
}
}
pub fn generate(iter: &mut RRuleIter) {
let options = iter.ii.options.clone();
match options.count {
Some(count) if count == 0 => return,
_ => (),
};
while iter.remain.is_empty() {
let (dayset, start, end) = iter.ii.getdayset(
&iter.ii.options.freq,
iter.counter_date.year() as isize,
iter.counter_date.month() as usize,
iter.counter_date.day() as usize,
);
let mut dayset = dayset
.into_iter()
.map(|s| Some(s as isize))
.collect::<Vec<Option<isize>>>();
let filtered = remove_filtered_days(&mut dayset, start, end, &iter.ii);
if options.bysetpos.len() > 0 {
let poslist = build_poslist(
&options.bysetpos,
&iter.timeset,
start,
end,
&iter.ii,
&dayset,
&options.tzid,
);
for j in 0..poslist.len() {
let res = poslist[j];
if options.until.is_some() && res > options.until.unwrap() {
// return iter_result.get_value();
continue; // or break ?
}
if res >= options.dtstart {
iter.remain.push(res);
if let Some(count) = iter.ii.options.count {
if count > 0 {
iter.ii.options.count = Some(count - 1);
}
// This means that the real count is 0, because of the decrement above
if count == 1 {
return;
}
}
}
}
} else {
for j in start..end {
let current_day = dayset[j];
if current_day.is_none() {
continue;
}
let current_day = current_day.unwrap();
let date =
from_ordinal(iter.ii.yearordinal().unwrap() + current_day, &options.tzid);
for k in 0..iter.timeset.len() {
let res = options
.tzid
.ymd(date.year(), date.month(), date.day())
.and_hms(
iter.timeset[k].hour as u32,
iter.timeset[k].minute as u32,
iter.timeset[k].second as u32,
);
if options.until.is_some() && res > options.until.unwrap() {
return;
}
if res >= options.dtstart {
iter.remain.push(res);
if let Some(count) = iter.ii.options.count {
if count > 0 {
iter.ii.options.count = Some(count - 1);
}
// This means that the real count is 0, because of the decrement above
if count == 1 {
return;
}
}
}
}
}
}
if options.interval == 0 {
return;
}
// Handle frequency and interval
iter.counter_date = increment_counter_date(iter.counter_date, &options, filtered);
if iter.counter_date.year() > 2200 {
return;
}
if options.freq == Frequenzy::Hourly
|| options.freq == Frequenzy::Minutely
|| options.freq == Frequenzy::Secondly
{
iter.timeset = iter.ii.gettimeset(
&options.freq,
iter.counter_date.hour() as usize,
iter.counter_date.minute() as usize,
iter.counter_date.second() as usize,
0,
);
}
let year = iter.counter_date.year();
let month = iter.counter_date.month();
iter.ii.rebuild(year as isize, month as usize);
}
}
impl IntoIterator for RRule {
type Item = DateTime<Tz>;
type IntoIter = RRuleIter;
fn into_iter(self) -> Self::IntoIter {
let mut ii = IterInfo::new(self.options);
let counter_date = ii.options.dtstart;
ii.rebuild(counter_date.year() as isize, counter_date.month() as usize);
let timeset = make_timeset(&ii, &counter_date, &ii.options);
RRuleIter {
counter_date,
ii,
timeset,
remain: vec![],
finished: false,
}
}
}
|
