ical-rs 0.1.0

iCalendar parser, validator, editor and builder library for Rust
Documentation 
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//! # CHARSET parameter lens
//!
//! The `CHARSET` parameter lens: the character set (vCalendar 1.0).

use alloc::{borrow::Cow, string::ToString, vec};

use crate::{
    param::IcalParamKind,
    tree::{
        codec::unescape::unescape,
        leaf::IcalLeaf,
        param::{IcalParamLens, IcalParamNode},
    },
};

/// The `CHARSET` parameter lens.
#[allow(non_camel_case_types)]
pub struct CHARSET;

impl IcalParamLens for CHARSET {
    const KIND: IcalParamKind = IcalParamKind::Charset;

    type Target<'v> = Cow<'v, str>;

    fn decode<'v>(param: &'v IcalParamNode<'_>) -> Cow<'v, str> {
        param
            .values
            .first()
            .map(|value| unescape(value.get()))
            .unwrap_or_default()
    }

    fn encode(decoded: &Cow<'_, str>) -> IcalParamNode<'static> {
        IcalParamNode {
            name: IcalLeaf::from(Self::KIND.to_string()),
            values: vec![IcalLeaf::from(decoded.to_string())],
        }
    }
}