const NOTIFS_TOKEN_DEPRECATED: &str = "notifs";
const NOTIFS_TOKEN: &str = "notifications";

impl TokenSerializable for AlgoTimeline {
    fn serialize_tokens(&self, writer: &mut TokenWriter) {
        match self {
            TimelineKind::List(list_kind) => list_kind.serialize_tokens(writer),
            TimelineKind::Algo(algo_timeline) => algo_timeline.serialize_tokens(writer),
            TimelineKind::Notifications(pk_src) => {
                writer.write_token(NOTIFS_TOKEN);
                pk_src.serialize_tokens(writer);
            }
        }
    }

    fn parse_from_tokens<'a>(parser: &mut TokenParser<'a>) -> Result<Self, ParseError<'a>> {
        TokenParser::alt(
            parser,
            &[
                |p| Ok(TimelineKind::List(ListKind::parse_from_tokens(p)?)),
                |p| Ok(TimelineKind::Algo(AlgoTimeline::parse_from_tokens(p)?)),
                |p| {
                    // still handle deprecated form (notifs)
                    p.parse_any_token([NOTIFS_TOKEN, NOTIFS_TOKEN_DEPRECATED])?;
                    Ok(TimelineKind::Notifications(
                        PubkeySource::parse_from_tokens(p)?,
                    ))
                },
            ],
        );
    }
}