ical_rust 0.8.6

use crate::errors::FrequencyParseError;
use std::{fmt, str::FromStr};

#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub enum Frequency {
    Yearly,
    Monthly,
    Weekly,
    Daily,
}

impl fmt::Display for Frequency {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        let s = match self {
            Frequency::Yearly => "YEARLY",
            Frequency::Monthly => "MONTHLY",
            Frequency::Weekly => "WEEKLY",
            Frequency::Daily => "DAILY",
        };
        write!(f, "{s}")
    }
}

impl FromStr for Frequency {
    type Err = FrequencyParseError;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
        match s.to_ascii_uppercase().as_str() {
            "YEARLY" => Ok(Frequency::Yearly),
            "MONTHLY" => Ok(Frequency::Monthly),
            "WEEKLY" => Ok(Frequency::Weekly),
            "DAILY" => Ok(Frequency::Daily),
            _ => Err(FrequencyParseError::UnrecognizedFrequency { freq: s.to_owned() }),
        }
    }
}