//! Banned nodes (`_continuum/banned/<node ID>`, `{"by", "at", "reason"}`), written by a
//! user who may write there, as any protocol data: a node refuses a banned node's
//! handshake, so it neither syncs with it nor counts it a member (`swarm::peer`), and
//! with the swarm's policy every node refuses the changes a banned node commits
//! (`access::rules`, judged as the ban stood when they were made). Deleting the entry
//! lifts the ban.

use crate::document::{ReadDoc, meta, store};

/// Where `node`'s ban is.
pub(crate) fn path(node: &str) -> Vec<String> {
    meta::path(&[meta::BANNED, node])
}

/// Whether `doc` bans `node`.
pub(crate) fn banned(doc: &impl ReadDoc, node: &str) -> bool {
    store::read_path(doc, &path(node)).ok().flatten().is_some()
}