coda-api 0.3.0

Coda API client
Documentation 
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use errgonomic::{handle, handle_opt};
use std::num::ParseIntError;
use thiserror::Error;
use time::Duration;

pub fn parse_duration_value(source: &impl AsRef<str>) -> Result<Option<Duration>, DurationValueParserError> {
    use DurationValueParserError::*;
    let trimmed = source.as_ref().trim();
    if trimmed.is_empty() {
        return Ok(None);
    }

    let mut tokens = trimmed.split_whitespace();
    let number_str = handle_opt!(tokens.next(), NumberNotFound);
    let unit_str = handle_opt!(tokens.next(), UnitNotFound);

    let number = handle!(number_str.parse::<i64>(), NumberParseFailed);

    let duration = match unit_str.to_ascii_lowercase().as_str() {
        "second" | "seconds" => Duration::seconds(number),
        "minute" | "minutes" => Duration::minutes(number),
        "hour" | "hours" => Duration::hours(number),
        "day" | "days" => Duration::days(number),
        _ => {
            return Err(UnitUnexpected {
                unit: unit_str.to_owned(),
            });
        }
    };

    Ok(Some(duration))
}

#[derive(Debug, Error)]
pub enum DurationValueParserError {
    #[error("duration value does not contain a number")]
    NumberNotFound,
    #[error("duration value does not contain a unit")]
    UnitNotFound,
    #[error("failed to parse duration number: {source}")]
    NumberParseFailed {
        #[source]
        source: ParseIntError,
    },
    #[error("unexpected duration unit: {unit}")]
    UnitUnexpected { unit: String },
}