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use crate::iter::IterResult;
use chrono::prelude::*;
use chrono::Duration;
use chrono_tz::Tz;
pub enum QueryMethodTypes {
All,
Between,
Before,
After,
}
pub struct IterArgs {
pub inc: bool,
pub before: Option<DateTime<Tz>>,
pub after: Option<DateTime<Tz>>,
pub dt: Option<DateTime<Tz>>,
}
pub struct RRuleIterRes {
pub method: QueryMethodTypes,
pub args: IterArgs,
pub min_date: Option<DateTime<Tz>>,
pub max_date: Option<DateTime<Tz>>,
pub result: Vec<DateTime<Tz>>,
pub total: usize,
}
impl RRuleIterRes {
pub fn new(method: QueryMethodTypes, args: IterArgs) -> Self {
let (max_date, min_date) = match method {
QueryMethodTypes::Between if args.inc => {
(Some(args.before.unwrap()), Some(args.after.unwrap()))
}
QueryMethodTypes::Between => (
Some(args.before.unwrap() - Duration::milliseconds(1)),
Some(args.after.unwrap() + Duration::milliseconds(1)),
),
QueryMethodTypes::Before if args.inc => (Some(args.dt.unwrap()), None),
QueryMethodTypes::Before => (Some(args.dt.unwrap() - Duration::milliseconds(1)), None),
QueryMethodTypes::After if args.inc => (None, Some(args.dt.unwrap())),
QueryMethodTypes::After => (None, Some(args.dt.unwrap() + Duration::milliseconds(1))),
_ => (None, None),
};
Self {
method,
args,
min_date,
max_date,
total: 0,
result: vec![],
}
}
pub fn add(&mut self, date: DateTime<Tz>) -> bool {
self.result.push(date);
true
}
}
impl IterResult for RRuleIterRes {
fn accept(&mut self, date: DateTime<Tz>) -> bool {
self.total += 1;
let too_early = self.min_date.is_some() && date < self.min_date.unwrap();
let too_late = self.max_date.is_some() && date > self.max_date.unwrap();
match self.method {
QueryMethodTypes::Between if too_early => true,
QueryMethodTypes::Between if too_late => false,
QueryMethodTypes::Before if too_late => false,
QueryMethodTypes::After if too_early => true,
QueryMethodTypes::After => {
self.add(date);
false
}
_ => self.add(date),
}
}
// before and after returns only one date whereas all and between an array
fn get_value(&self) -> Vec<DateTime<Tz>> {
match self.method {
QueryMethodTypes::Between | QueryMethodTypes::All => self.result.clone(),
_ => {
if self.result.is_empty() {
return vec![];
}
vec![self.result[self.result.len() - 1].clone()]
}
}
}
}
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