Files
siftlode/backend/app/utils.py
T
peter 876cece881 fix(auth): match identity on a canonical email, so one Gmail mailbox is one account (E9.5 S3)
Gmail delivers x.y@, xy@ and xy+tag@ to one inbox; the invite gate only lowercased.
On 2026-09-03 that turned an approved user's Google sign-in into a silent SECOND
access request -- OAuth returns the account's stored primary, which need not be the
spelling they typed -- and left prod with two user rows for one mailbox (ids 13, 14).
The +tag case fails every time: a Google account cannot contain +, so OAuth can only
ever answer with the base address.

Mail still goes to the address AS TYPED; only identity matching uses the canonical
form. utils.canonical_email is the single definition, and a model validator derives
users.email_canonical / invites.email_canonical on every write, so no call site can
forget it. Scope is narrow on purpose: dots are significant on most providers and the
Gmail rule does not hold for Workspace custom domains.

Swept every sibling of the same principle, not just the reported one: is_allowed,
upsert_pending_invite, the Google-callback adoption, _register_account (so no new
duplicate pair can be created), _activate_user_by_email, admin _accounts_for (an
invite backing a live user under another spelling used to look deletable) and
add_invite, plus purge_user, which now erases every canonically-equal invite instead
of leaving one behind that still grants access.

Migration 0079 backfills both columns and indexes them NON-uniquely: prod already
carries canonical duplicates (approved invite pairs since 2026-06-16), and merging
accounts is a judgement call about people's data, not something a migration does on
its own. A test pins the backfill SQL against the Python helper.
2026-09-04 00:14:12 +02:00

89 lines
4.6 KiB
Python

"""Small cross-cutting helpers shared across modules (kept dependency-light on purpose)."""
import re
from datetime import date, datetime, timezone
def iso(dt: date | None) -> str | None:
"""Serialize a date/datetime for a JSON response: ISO-8601, or None when the column is
NULL. Single source of truth for the `x.isoformat() if x else None` idiom the routes had
hand-rolled ~17 times — so a future tz/format tweak lands in one place. Accepts `date`
too (datetime is a subclass) — e.g. MediaAsset.upload_date is a plain `date`."""
return dt.isoformat() if dt is not None else None
# Single source of truth for "looks like an email" — used by every endpoint that accepts an
# address (auth register/reset/demo, admin invites + demo whitelist, the setup wizard). Keep
# the strictness in one place so routes don't drift between this and a looser "@"-in check.
_EMAIL_RE = re.compile(r"^[^@\s]+@[^@\s]+\.[^@\s]+$")
def valid_email(value: str | None) -> bool:
return bool(value and _EMAIL_RE.match(value))
# Gmail (and its googlemail.com alias) delivers to one mailbox regardless of dots in the local part
# and of any `+tag`; nobody else is guaranteed to. So the canonical form below strips those for
# Gmail only, and merely lowercases everything else.
_GMAIL_DOMAINS = {"gmail.com", "googlemail.com"}
def canonical_email(value: str | None) -> str:
"""The form used to decide whether two addresses are the SAME MAILBOX. Never used for sending —
mail always goes to the address as the user typed it.
Why this exists (observed on prod, 2026-09-03): someone registered as `npeter83.temu@gmail.com`
and was approved, but Google's OAuth `email` claim came back as the account's stored primary,
`npeter83temu@gmail.com`. The invite gate only lowercased, found no approved row for that literal
string, and turned an approved user's sign-in into a silent SECOND access request — plus a second
User row. The `+tag` case is worse and fails every time: a Google account cannot contain `+`, so
OAuth can only ever return the base address, meaning anyone who registers with
`user+siftlode@gmail.com` (a common throwaway habit) is guaranteed to be denied after approval.
Scope is deliberately narrow. The dot rule does NOT hold for Google Workspace custom domains
unless the admin turned it on, and dots are significant on most providers, so anything outside
gmail.com/googlemail.com is only lowercased. Approving one Gmail spelling always did mean
approving that mailbox, so collapsing them is the honest reading of an invite, not a widening
of it.
"""
email = (value or "").strip().lower()
local, sep, domain = email.partition("@")
if not sep or domain not in _GMAIL_DOMAINS:
return email
local = local.partition("+")[0].replace(".", "")
# Normalise the alias domain too, so googlemail and gmail spellings meet.
return f"{local}@gmail.com" if local else email
def now_utc() -> datetime:
"""Current time as a timezone-aware UTC datetime."""
return datetime.now(timezone.utc)
def to_tsquery_str(q: str) -> str | None:
"""Turn free-text into a to_tsquery() string: word runs ANDed together, the LAST word
prefix-matched (`:*`) for as-you-type search — e.g. "ti amo magyar" → "ti & amo & magyar:*".
Only `\\w` runs containing an alphanumeric are kept, so no tsquery operators can leak in
(the string is built from sanitised tokens, never the raw query). Shared by the YouTube feed
search and the Plex library search, hence this neutral home rather than either domain module."""
tokens = [t for t in re.findall(r"\w+", q, flags=re.UNICODE) if any(c.isalnum() for c in t)]
if not tokens:
return None
tokens[-1] = tokens[-1] + ":*"
return " & ".join(tokens)
def normalize_description(text: str | None) -> str | None:
"""Strip whitespace-only lines from a CHANNEL description before storing. YouTube channel
descriptions pad their contact/link blocks with runs of blank lines; keeping them wastes storage,
bloats the About popover, and adds nothing to the search document. Drops purely-empty lines and
right-strips each kept line; `str.splitlines()` also folds CR / CRLF and Unicode line separators
to "\\n" (a benign line-ending normalization). None stays None; all-blank collapses to "".
Deliberately CHANNEL-only — video descriptions are left with their original formatting: they are
user-facing prose where paragraph breaks carry meaning, unlike a channel's metadata block."""
if text is None:
return None
kept = [line.rstrip() for line in text.splitlines() if line.strip()]
return "\n".join(kept)