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use crate::options::*;
use crate::rrulestr::build_rrule;
use chrono::prelude::*;
use chrono_tz::Tz;
use std::str::FromStr;
#[derive(Clone, Debug)]
pub struct RRule {
pub options: ParsedOptions,
}
impl RRule {
pub fn new(options: ParsedOptions) -> Self {
Self { options }
}
/// Returns all the recurrences of the rrule
pub fn all(&self) -> Vec<DateTime<Tz>> {
self.into_iter().collect()
}
/// Returns the last recurrence before the given datetime instance.
/// The inc keyword defines what happens if dt is an recurrence.
/// With inc == true, if dt itself is an recurrence, it will be returned.
pub fn before(&self, dt: DateTime<Tz>, inc: bool) -> Option<DateTime<Tz>> {
self.into_iter()
.take_while(|d| if inc { *d <= dt } else { *d < dt })
.last()
}
/// Returns the last recurrence after the given datetime instance.
/// The inc keyword defines what happens if dt is an recurrence.
/// With inc == true, if dt itself is an recurrence, it will be returned.
pub fn after(&self, dt: DateTime<Tz>, inc: bool) -> Option<DateTime<Tz>> {
self.into_iter()
.skip_while(|d| if inc { *d <= dt } else { *d < dt })
.next()
}
/// Returns all the recurrences of the rrule between after and before.
/// The inc keyword defines what happens if after and/or before are
/// themselves recurrences. With inc == true, they will be included in the
/// list, if they are found in the recurrence set.
pub fn between(
&self,
after: DateTime<Tz>,
before: DateTime<Tz>,
inc: bool,
) -> Vec<DateTime<Tz>> {
self.into_iter()
.skip_while(|d| if inc { *d <= after } else { *d < after })
.take_while(|d| if inc { *d <= before } else { *d < before })
.collect()
}
}
impl FromStr for RRule {
type Err = RRuleParseError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
build_rrule(s)
}
}
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