Function validate_path_available

atomic-core/src/crdt/apply/trunk.rs:341–355

Checks if a path is available (not taken by another file). # Arguments `txn` - The transaction `path` - The path to check `exclude` - Optionally exclude this trunk from the check # Returns `Ok(())` if the path is available, or an error if it's taken.

(
    txn: &T,
    path: &str,
    exclude: Option<TrunkId>,
)

///
/// `Ok(())` if the path is available, or an error if it's taken.
pub fn validate_path_available<T: MutCrdtTxnT>(
    txn: &T,
    path: &str,
    exclude: Option<TrunkId>,
) -> ApplyResult<()> {
    if let Some(existing) = txn
        .get_trunk_by_path(path)
        .map_err(|e| storage_err(e, "checking path"))?
    {
        if exclude != Some(existing) {
            return Err(ApplyError::path_already_exists(path, existing));
        }
    }
    Ok(())
}

// Tests