caldata 0.16.2

Ical/Vcard parser for Rust
Documentation 
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use std::{
    collections::HashMap,
    ops::{Add, Sub},
};

use chrono::{DateTime, Duration, NaiveDate, NaiveTime, Utc};
use derive_more::From;

use crate::{
    generator::Emitter,
    parser::{ContentLine, ParserError},
    types::{CalDate, CalDateTime, Tz, Value},
};

#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, From)]
pub enum CalDateOrDateTime {
    DateTime(CalDateTime),
    Date(CalDate),
}

impl CalDateOrDateTime {
    pub fn parse_prop(
        prop: &ContentLine,
        timezones: Option<&HashMap<String, Option<chrono_tz::Tz>>>,
        default_type: &str,
    ) -> Result<Self, ParserError> {
        Ok(match prop.params.get_value_type().unwrap_or(default_type) {
            "DATE" => Self::Date(CalDate::parse_prop(prop, timezones)?),
            "DATE-TIME" => Self::DateTime(CalDateTime::parse_prop(prop, timezones)?),
            _ => return Err(ParserError::InvalidPropertyType(prop.generate())),
        })
    }

    pub fn is_date(&self) -> bool {
        matches!(self, Self::Date(_))
    }

    pub fn date_floor(&self) -> NaiveDate {
        match self {
            Self::DateTime(datetime) => datetime.date_floor(),
            Self::Date(date) => date.naive_date().to_owned(),
        }
    }

    pub fn date_ceil(&self) -> NaiveDate {
        match self {
            Self::DateTime(datetime) => datetime.date_ceil(),
            Self::Date(date) => date.naive_date().to_owned(),
        }
    }

    pub fn timezone(&self) -> Tz {
        match self {
            Self::DateTime(datetime) => datetime.timezone(),
            Self::Date(date) => *date.timezone(),
        }
    }

    pub fn utc(&self) -> DateTime<Utc> {
        match self {
            Self::DateTime(datetime) => datetime.utc(),
            Self::Date(date) => date.naive_date().and_time(NaiveTime::default()).and_utc(),
        }
    }

    pub fn format(&self) -> String {
        match self {
            Self::DateTime(datetime) => datetime.format(),
            Self::Date(date) => date.format(),
        }
    }

    pub fn value_type(&self) -> &'static str {
        match self {
            Self::DateTime(_) => "DATE-TIME",
            Self::Date(_) => "DATE",
        }
    }
}

impl Sub<&CalDateOrDateTime> for CalDateOrDateTime {
    type Output = Duration;

    fn sub(self, rhs: &CalDateOrDateTime) -> Self::Output {
        self.utc() - rhs.utc()
    }
}

impl From<CalDateOrDateTime> for CalDateTime {
    fn from(value: CalDateOrDateTime) -> Self {
        match value {
            CalDateOrDateTime::DateTime(datetime) => datetime,
            CalDateOrDateTime::Date(date) => date.as_datetime().into(),
        }
    }
}

impl From<CalDateOrDateTime> for DateTime<Tz> {
    fn from(value: CalDateOrDateTime) -> Self {
        match value {
            CalDateOrDateTime::DateTime(datetime) => datetime.0,
            CalDateOrDateTime::Date(date) => date.as_datetime(),
        }
    }
}

impl Add<Duration> for CalDateOrDateTime {
    type Output = CalDateTime;

    fn add(self, duration: Duration) -> Self::Output {
        CalDateTime::from(self) + duration
    }
}

impl Value for CalDateOrDateTime {
    fn value_type(&self) -> Option<&'static str> {
        match self {
            CalDateOrDateTime::DateTime(datetime) => datetime.value_type(),
            CalDateOrDateTime::Date(date) => date.value_type(),
        }
    }

    fn value(&self) -> String {
        match self {
            CalDateOrDateTime::DateTime(datetime) => datetime.value(),
            CalDateOrDateTime::Date(date) => date.value(),
        }
    }

    fn utc_or_local(self) -> Self {
        match self {
            Self::DateTime(datetime) => Self::DateTime(datetime.utc_or_local()),
            Self::Date(date) => Self::Date(date.utc_or_local()),
        }
    }
}