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Jakob Wennberg 2296c0cd59 fix(auth): provision invitees server-side when signups are disabled (#1404)
* fix(auth): provision invitees server-side when signups are disabled

Self-hosted installations with GoTrue disable_signup broke the invite
flow silently: invitees without an account were routed to /register,
where supabase.auth.signUp fails with "Signups not allowed for this
instance", surfaced only as a generic toast.

New server-only env flag AUTH_SIGNUPS_DISABLED (documented in
.env.example) mirrors the GoTrue setting. When true, POST
/api/company/members/invite checks check_email_exists and, for invitees
without an account, provisions one via auth.admin.inviteUserByEmail
with a redirect back to /invite/<token>, before the Resend email and
before the invitation row is written so a provisioning failure leaves
nothing half-created and the admin can retry. The response now carries
user_provisioned alongside email_sent, and a provisioning failure
returns 502 with a Swedish message mapped through getErrorMessage
instead of a silently-successful invite.

/auth/callback now routes type=invite verifications to /reset-password
(the existing set-password surface) instead of dropping the
passwordless user on the dashboard, and preserves the invite token from
next=/invite/<token> as the pre-auth invite cookie so the existing
reset-password invite handoff accepts the membership right after the
password is saved.

getErrorMessage learns two GoTrue patterns: "Signups not allowed"
(account creation closed on this installation, contact your inviter or
administrator) so the /register dead end is explained even for flows
that bypass provisioning, and "Error sending ... email" (GoTrue SMTP
not configured) so the 502 above is actionable.

Hosted is untouched: the flag is unset there and every new code path is
gated on it.

Fixes #1335

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* fix(auth): restore check_email_exists RPC and harden self-host invite config

Adversarial review of #1404 found that the check_email_exists function the
invite flow depends on does not exist anywhere: it shipped in PR #229 and
was lost in the #244 migration consolidation before ever reaching prod
(verified missing on the hosted production database directly). Today
app/api/team/accept destructures only { data } from the RPC call, so
alreadyHasAccount is silently null on every deployment and the invite page
routes even existing-account invitees toward /register.

- New migration 20260804140000 restores the function exactly as originally
  shipped: SECURITY DEFINER over auth.users, EXECUTE revoked from PUBLIC,
  anon and authenticated, granted to service_role only (prevents email
  enumeration). Fixes hosted prod behavior too once applied.
- New tests/pg/check-email-exists.pg.test.ts locks in existence,
  case-insensitive matching, false-for-unknown, and the role grants.
- .env.docker.example gains the AUTH_SIGNUPS_DISABLED block self-hosters
  actually use; both env templates now note that the GoTrue redirect URI
  allow-list must include /invite/* or the invite email redirect silently
  falls back to SITE_URL.
- Invite route test for the existsError branch: RPC failure logs a warning
  and provisioning proceeds anyway (GoTrue is authoritative).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* fix(auth): mask invitee email in provisioning-failure log (#1335)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

---------

Co-authored-by: Jakob Wennberg <311770904+jakobwennberg-oss@users.noreply.github.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
2026-08-04 19:34:54 +02:00

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NEXT_PUBLIC_SUPABASE_URL=https://your-project.supabase.co
NEXT_PUBLIC_SUPABASE_ANON_KEY=your-anon-key
SUPABASE_SERVICE_ROLE_KEY=your-service-role-key
NEXT_PUBLIC_APP_URL=https://your-domain.com
CRON_SECRET=generate-a-random-secret
# Self-hosted (Docker) flag: disables application-side MFA enforcement.
NEXT_PUBLIC_SELF_HOSTED=true
# Session timeouts are also disabled by default for self-hosted deployments.
# Uncomment to opt into hosted-style banking-app limits (milliseconds).
# NEXT_PUBLIC_SESSION_IDLE_TIMEOUT_MS=1800000
# NEXT_PUBLIC_SESSION_ABSOLUTE_TIMEOUT_MS=43200000
# NEXT_PUBLIC_SESSION_WARNING_MS=120000
# Optional dedicated HMAC secret; otherwise SUPABASE_SERVICE_ROLE_KEY is used.
# SESSION_TIMEOUT_SECRET=
# Set to true when public signup is turned off in your GoTrue/Supabase auth
# config (GOTRUE_DISABLE_SIGNUP / "Allow new users to sign up" off). GoTrue
# offers no clean server-side read of that setting, so this flag mirrors it.
# When true, inviting a teammate who has no account provisions the account
# server-side via the auth admin invite API (GoTrue must have SMTP configured
# to deliver that mail) instead of relying on public /register, which GoTrue
# would reject with "Signups not allowed".
# The GoTrue redirect URI allow-list (URI Allow List / GOTRUE_URI_ALLOW_LIST)
# must include /invite/* or the invite email's redirect silently falls back
# to SITE_URL.
# AUTH_SIGNUPS_DISABLED=false
# Optional: WebSocket origin allowed for Supabase Realtime in the CSP.
# Defaults to NEXT_PUBLIC_SUPABASE_URL with https:// replaced by wss://
# (http:// by ws://). Set only if Realtime is served from another origin.
# NEXT_PUBLIC_SUPABASE_WS_URL=wss://your-project.supabase.co