Module auth 

Authentication & authorization.

Three pieces:

• users.rs — user records, password hashing, login
• sessions.rs — DB-backed sessions with expiry cleanup
• permissions.rs — granular permissions + groups

A user belongs to zero or more groups. Permissions come from two sources: (a) direct assignments on the user, (b) inherited from the user’s groups. The permission string is <app>.<action>_<model> — e.g. posts.change_post.

Structs

Identity

The identity attached to a request by the auth middleware. Kept cheap to clone because we pass it into handler bodies.

Permission

StoredUser

Superuser

Marker type used by the admin’s authorize macro for fast-paths on admins.

UserProfile

Read-only view of a user, used by the built-in admin profile page. Excludes password_hash deliberately. Construct via load_user_profile.

Enums

PermissionError

Role

Constants

SESSION_COOKIE

The cookie name we look for and set. Constant so middleware and handlers stay in sync.

Functions

add_user_to_group

check_permission

Ask “does this identity have permission X?”.

create_group

create_session

create_user

delete_session

find_user_by_email

grant_to_group

grant_to_user

hash_password

identity_from_session

init_permission_tables

init_session_tables

init_tables

Initialise every auth-related table. Safe to call on every boot.

init_user_tables

load_user_profile

Load a user by id for display purposes. Returns Ok(None) for a missing id (callers map to 404). Returns Err only on a real DB failure or a corrupted role string. Never reads password_hash.

login

Verify credentials and create a session. Returns the session token to set in the cookie. A deliberately vague error on failure — we don’t want to leak whether the email was valid.

migrate_user_schema

Idempotent schema upgrade for the 5-tier role hierarchy + demo + profile columns. Safe to call repeatedly; safe on a fresh DB and on a legacy 'admin'-roled DB.

permissions_for_user

All permission names belonging to the given user — direct + via groups — unioned into one set. Cached for 60s.

purge_expired_sessions

Delete all expired sessions. Intended to be called periodically from a background task (see background::spawn_session_sweeper).

register_model_permissions

For an admin model named posts, register the canonical four permissions: add_post, change_post, delete_post, view_post. Idempotent.

remove_user_from_group

session_token_from_cookie

set_password

update_user_role

verify_password

would_orphan_developers

Would the proposed change leave the system with zero active Developers?