Function parse_expiry_key

nodedb/src/engine/kv/engine_helpers.rs:24–32

Parse a composite expiry key back into (tenant_id, collection, key_bytes).

(composite: &[u8])

/// Parse a composite expiry key back into (tenant_id, collection, key_bytes).
pub(super) fn parse_expiry_key(composite: &[u8]) -> Option<(u64, String, Vec<u8>)> {
    let null_pos = composite.iter().position(|&b| b == 0)?;
    let prefix = std::str::from_utf8(&composite[..null_pos]).ok()?;
    let colon_pos = prefix.find(':')?;
    let tenant_id: u64 = prefix[..colon_pos].parse().ok()?;
    let collection = prefix[colon_pos + 1..].to_string();
    let key = composite[null_pos + 1..].to_vec();
    Some((tenant_id, collection, key))
}

// ---------------------------------------------------------------------------
// Field extraction from MessagePack values (for secondary index maintenance)