Module id 

Available on crate feature id only.

ID generation — Rust port of du-node-utils/lib/id.js.

The function names track the Node original (snake-cased to match Rust conventions). UUIDs and nanoids are exposed on top as Rust-side conveniences.

Node parity

Node	Rust
id.makeUUID(false)	uuid_v4
id.makeUUID(true)	uuid_v4_simple
id.randomInt(min, max)	random_int
id.randomString(len)	random_string
id.makeUidPostfix()	make_uid_postfix
id.makeUserId(a, u, c)	make_user_id
id.parseUserid(s)	parse_user_id
id.makeDbKey(uid)	make_db_key
id.setSessionPrefix(p)	set_session_prefix
id.generateSessionId()	generate_session_id

Rust additions (no Node equivalent):

• uuid_v7 / uuid_v7_simple — time-ordered UUIDs.
• nanoid / nanoid_with_len / nanoid_with_alphabet — short URL-safe IDs.

Structs

UserId

Result of parse_user_id.

Constants

DEFAULT_NANOID_LEN

Default nanoid length (matches the upstream library’s default).

Functions

generate_session_id

Generate a session ID in the same format as Node’s generateSessionId: <prefix><13-digit ms timestamp><5-char base36 suffix>.

make_db_key

Build a database key in the form connect.<uid>.

make_uid_postfix

Generate a UID postfix: hex of (unix_ms * 1000 + random_in_0..1000).

make_user_id

Build a user ID in the form connect.<appid>.<uid>.<cuid>.

nanoid

Generate a nanoid of the default length (21 chars).

nanoid_with_alphabet

Generate a nanoid of a custom length and alphabet.

nanoid_with_len

Generate a nanoid of a custom length using the URL-safe alphabet.

parse_user_id

Parse a user ID produced by make_user_id. Returns None if the string has fewer than four .-separated segments.

random_int

Generate a random integer in the half-open range [min, max).

random_string

Generate a random string of length len using the same 36-char alphabet as Node’s id.randomString(len): 0-9 plus qwertyuioplkjhgfdsazxcvbnm (keyboard order).

set_session_prefix

Set a custom session prefix used by generate_session_id.

uuid_v4

Generate a random UUID v4 as a hyphenated string (36 chars).

uuid_v7

Generate a UUID v7 (time-ordered, monotonic per millisecond) as a hyphenated string.

uuid_v4_simple

Generate a random UUID v4 without hyphens (32 hex chars).

uuid_v7_simple

Generate a UUID v7 without hyphens.