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feat(api): close the four gaps the fifth audit named - #123

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feat/oauth-scopes-and-opensubsonic-gaps
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feat(api): close the four gaps the fifth audit named#123
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feat/oauth-scopes-and-opensubsonic-gaps

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@InstaZDLL InstaZDLL commented Aug 20, 2026

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Closes the four lines the fifth-pass audit left open: the named OAuth debt, and the three OpenSubsonic gaps.

Scopes travel through the grant

oauth_authorization and session each gain a scopes_json column. The consent step records the caller's scopes on the grant, redeeming it issues the session under those same scopes, and authenticate reads the limit off the session exactly as it already read it off an API token. Refreshing carries them too — rotation returns a session as narrow as the one it replaced, never wider.

Both columns default to '[]', which is what every row written before them meant: a password login, or a grant that could only have been made by an unscoped credential.

Access::Unrestricted is gone, and that is the point rather than a side effect. It existed to close this escalation without a migration, and RFC-002 said so — "until it exists this closes the path without a migration". With the columns in place, minting asks Write: pairing a device is a mutation on the account, and the session it yields can no longer be broader than the credential that asked for it. A write token now pairs a device and gets a write session; a read token still cannot pair at all.

Keeping the blanket guard was the alternative, and it was tempting. It would have made the new column unreachable — nothing narrowed could ever populate it — so the durable fix would have been dead code, verifiable only at the database layer. Defence in depth that no path can exercise is not defence, it is an untested branch.

The test proves it by failing without it. Removing the carrying makes GET /api/v2/admin/users answer 200 instead of 403 to a session redeemed from a write grant — the original escalation, reproduced. The account is an administrator, so nothing but the inherited scope list can refuse it. A second assertion covers the reported scopes, which the enforcement check cannot see: sabotaging the refresh path alone leaves enforcement correct (rotation reuses the session row) and is caught only there.

sortName on AlbumID3 and ArtistID3

album.sort_name and artist.sort_name, read from ALBUMSORT, ALBUMARTISTSORT and ARTISTSORT. Added empty and filled by the next scan, like every other tag column.

A joined credit pairs with its joined sort tag position by position, which is what taggers write. When the two lists disagree in length the tag is describing something this cannot map, and every credit in it gets no sort form rather than a wrong one — filing one artist under another artist's name is the failure mode #122 spent four commits removing, and it is not worth re-earning for a sort key.

COALESCE on the stored side: the artist row is rewritten once per track of every album it appears on, so a file with no sort tag must not erase what a sibling supplied.

Both are emitted with their default like every other supported OpenSubsonic addition, so an untagged album now reports sortName="". That is the presence rule's whole distinction — supported and unknown, rather than absent and therefore unsupported.

One bug found while testing this, and it is the interesting one: two hand-written artist projections in services.rs duplicate artist_select! instead of using it, and adding a column to the macro broke getArtists and search3 with an internal error. They were already drifting; the new column is what made the drift fail loudly. Both now carry ar.sort_name. The macro comment says these projections exist so tenancy cannot drift — the same argument applies to their columns, and a follow-up folding the two queries into the macro would be worth it.

A parent that contains its child

A track with no album names its library as song.parent for want of an album id. Browsing to that identifier listed the library's artists and stopped, so a track reachable by search was reachable by no amount of browsing.

The folder level of getMusicDirectory now lists those tracks after that library's artists. No attribute changes value — the fix is that the identifier the track already advertised now resolves. That was the deliberate choice over omitting parent, which would have altered the wire for every client against a contract frozen for v2.0-beta and revalidated on four clients five days ago.

songs_without_album is scoped to one library and unpaged, matching the level it serves: that listing already answers with every artist of the library, unpaged, from catalog_overview.

/api/v2/search documents its 400

q is required, so axum's extractor already answered 400; the OpenAPI document did not say so while /api/v2/songs did. Annotation only — and the test asserts the route still means it.

What is deliberately not here

getLicense keeps its hard-coded 2099-12-31 expiry and empty email. The server has no licence, a fixed far-future date is the usual way to say "always valid", and it is what four clients were validated against. Changing it costs more than it returns.

Contract

Two additive attributes and one directory that is no longer a dead end. No existing attribute changes value or disappears, so a client validated against the 2026-08-19 replay sees the same catalogue with more on it. RFC-002 and docs/subsonic-compatibility.md are updated, including the Access vocabulary, which is now Read / Write / Admin.

Checks

cargo fmt --all --check, cargo clippy --all-targets --all-features -- -D warnings and cargo test --all-features all pass locally. 36 tests, one new.

Summary by CodeRabbit

  • Nouvelles fonctionnalités

    • Les albums et artistes exposent désormais leur nom de tri (sortName).
    • Les morceaux sans album apparaissent dans les dossiers de bibliothèque.
    • Les genres utilisent leur nom canonique.
    • Les scopes OAuth sont conservés lors de l’autorisation et du renouvellement des sessions.
    • Les permissions OAuth sont appliquées plus précisément aux opérations d’administration, d’écriture et d’appairage d’appareils.
    • Les références d’artistes sont exposées de manière cohérente dans les réponses Subsonic.
  • Documentation

    • La compatibilité Subsonic et l’erreur de recherche sans paramètre sont désormais documentées.

Carry credential scopes through the OAuth grant, and answer for the three
OpenSubsonic fields the catalogue could not.

`oauth_authorization` and `session` gain a `scopes_json` column. The consent
step records the caller's scopes on the grant, redemption issues the session
under them, and `authenticate` reads the limit off the session as it already
did off an API token. Rotation carries them too. Both default to the empty
list, which is what every existing row meant.

`Access::Unrestricted` goes with it. It stood in for the migration — RFC-002
said "until it exists this closes the path without a migration" — and keeping
it would have made the new column unreachable, since nothing narrowed could
then populate it. Minting asks `Write`: pairing a device is a mutation, and
what it mints can no longer be wider than what asked for it.

`album.sort_name` and `artist.sort_name` hold the tagged sort forms, read from
ALBUMSORT, ALBUMARTISTSORT and ARTISTSORT. A joined credit pairs with its
joined sort tag position by position; lengths that disagree yield no sort form
at all rather than filing one artist under another's name. Both are emitted
with their default, so an untagged album reports sortName="" — supported and
unknown, where the field used to be absent and therefore unsupported.

The folder level of getMusicDirectory now lists the tracks of that library
which belong to no album. They already named it as their `parent`; browsing
there found none of them. No attribute changes value.

Adding a column to `artist_select!` broke `getArtists` and `search3`: two
hand-written projections in services.rs duplicate the macro instead of using
it. Both now carry the column. The drift predates this change; the new column
is what made it fail loudly.

`/api/v2/search` documents the 400 its required `q` already produced.

`getLicense` keeps its hard-coded expiry deliberately: the server has no
licence, and four clients were validated against what it sends.

Signed-off-by: InstaZDLL <github.105mh@8shield.net>
@github-actions github-actions Bot added type: feat New feature scope: server Server core (Rust) scope: auth Authentication, tokens, sessions scope: docs Docs, README, assets scope: db SQLite schema, migrations, queries scope: api Native /api/v2 surface scope: subsonic Subsonic / OpenSubsonic compatibility scope: scanner size: l 200-500 lines and removed type: feat New feature labels Aug 20, 2026
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📝 Walkthrough

Walkthrough

Cette PR persiste les scopes OAuth entre les autorisations et les sessions. Elle ajoute les noms de tri des albums et artistes. Elle inclut les morceaux sans album dans getMusicDirectory et met à jour le contrat Subsonic ainsi que les tests.

Changes

Propagation des scopes OAuth

Layer / File(s) Summary
Contrat et persistance des scopes
migrations-v2/*, src/database.rs
Les autorisations et les sessions stockent leurs scopes dans scopes_json. Les helpers communs encodent et décodent ces valeurs avec propagation des erreurs.
Émission et conservation des scopes
src/authentication.rs, src/http.rs, src/services.rs, tests/v2_foundations.rs
OAuth transmet les scopes du credential au grant et à la session. Le rafraîchissement conserve ces scopes. Les scopes vides restent non restrictifs.

Métadonnées de tri du catalogue

Layer / File(s) Summary
Extraction et stockage des noms de tri
migrations-v2/*, src/scanner.rs, src/catalog.rs
Le scanner lit les tags de tri. CatalogTrackInput les transporte. Le catalogue les associe positionnellement aux crédits et consolide les valeurs d’album et d’artiste.
Projection des noms de tri
src/services.rs, src/subsonic.rs, docs/subsonic-compatibility.md, tests/v2_foundations.rs
Les projections SQL et les modèles ArtistItem et AlbumItem exposent sort_name. Les réponses Subsonic émettent sortName, y compris lorsqu’il est vide.

Navigation Subsonic

Layer / File(s) Summary
Contenu des répertoires
src/services.rs, src/subsonic.rs, docs/rfcs/..., src/http.rs
songs_without_album récupère les morceaux sans album. music_directory les ajoute au niveau de la bibliothèque. La recherche documente l’erreur 400 lorsque q est absent.
Réponses et validation du protocole
docs/rfcs/..., docs/subsonic-compatibility.md, tests/v2_foundations.rs
Le contrat documente les références d’artistes, les genres canoniques, l’ordre des pistes et les champs non implémentés. Les tests couvrent OAuth, sortName, les morceaux sans album, les références d’artistes et le rescannage.

Estimated code review effort: 4 (Complex) | ~45 minutes

Merge Risk: 🟡 Moderate · up to e849e

The change expands scope propagation and adds sort metadata and browsing results, but unrecognized token scopes can still reach read-only routes, removed sort tags can remain visible after rescanning, and the public sortName contract is incomplete. These bounded security and compatibility issues should be fixed or explicitly accepted before merging.

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Title check ✅ Passed Le titre résume clairement la correction des quatre écarts d’audit, qui correspond à l’objectif principal de la PR.
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src/http.rs (1)

2271-2280: 🔒 Security & Privacy | 🟠 Major | ⚡ Quick win

Refuser les scopes inconnus pour Access::Read.

La ligne 2277 autorise toute route Read sans vérifier les scopes. Un token contenant uniquement un scope inconnu peut donc lire les données du compte. Ceci contredit RFC-002, qui indique qu’un nom inconnu « grants nothing ».

Définissez un scope de lecture reconnu. Autorisez Read seulement avec ce scope, write ou admin si ces scopes impliquent la lecture. Ajoutez un test d’intégration avec un token ne contenant qu’un scope inconnu et vérifiez une réponse 403.

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In `@src/http.rs` around lines 2271 - 2280, Modifiez Access::granted_by pour
définir et utiliser un scope de lecture reconnu : Access::Read ne doit être
accordé qu’avec ce scope, WRITE_SCOPE ou ADMIN_SCOPE, tandis que les scopes
inconnus n’accordent aucun accès. Conservez les règles existantes pour Write et
Admin. Ajoutez un test d’intégration avec un token contenant uniquement un scope
inconnu et vérifiez que la réponse est 403.
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Inline comments:
In `@src/catalog.rs`:
- Around line 1027-1034: Reconcile artist and album sort values at the end of a
complete scan so removed sort tags clear stale sortName values instead of being
preserved by the COALESCE updates in the artist and corresponding album upserts.
Keep the existing preservation behavior for the repair path that does not read
tags, and add a regression test covering tag removal followed by a full scan and
an empty sortName result.

In `@src/scanner.rs`:
- Around line 643-645: Dans le test
extended_tags_survive_the_shapes_real_files_use, insérez explicitement les
valeurs MP4 pour AlbumTitleSortOrder, AlbumArtistSortOrder et
TrackArtistSortOrder, puis vérifiez qu’elles sont exposées respectivement via
sort_album, sort_album_artist et sort_artist.

---

Outside diff comments:
In `@src/http.rs`:
- Around line 2271-2280: Modifiez Access::granted_by pour définir et utiliser un
scope de lecture reconnu : Access::Read ne doit être accordé qu’avec ce scope,
WRITE_SCOPE ou ADMIN_SCOPE, tandis que les scopes inconnus n’accordent aucun
accès. Conservez les règles existantes pour Write et Admin. Ajoutez un test
d’intégration avec un token contenant uniquement un scope inconnu et vérifiez
que la réponse est 403.
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  • docs/rfcs/RFC-002-waveflow-server-v2.md
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  • migrations-v2/20260819000000_oauth_authorization_scopes.sql
  • migrations-v2/20260819010000_session_scopes.sql
  • migrations-v2/20260819020000_album_artist_sort_name.sql
  • src/authentication.rs
  • src/catalog.rs
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  • src/http.rs
  • src/scanner.rs
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Comment thread src/catalog.rs Outdated
Comment thread src/scanner.rs
Review found that `sort_name` written under a COALESCE outlived the tag:
remove ALBUMSORT, rescan, and the old value stayed. `consolidate_musicbrainz_ids`
had already answered this for the identifiers — "a tag removed from the files
has to disappear from the catalogue too" — and it can only do that because the
identifiers live on the track.

The sort tags now do the same. `track.sort_album` and `track_artist.sort_name`
hold them, the latter because a joined ARTISTSORT is paired with its joined
ARTIST where the names are split rather than in SQL. A credit the track tag
says nothing about falls back to the album artist tag when the two name the
same artist, matched on the name so this cannot file one artist under
another's sort form.

`consolidate_sort_names` re-derives both at the end of every scan, beside the
identifier vote: majority, deterministic tie-break, and NULL when no available
track carries a tag. Neither upsert writes a sort name any more, so there is no
preservation left to outlive anything.

The regression test removes the tags from an already-indexed file and rescans;
it fails with the old preservation, reporting the stale sort name.

Also pins the three sort keys in the scanner's MP4 tag test, which covered
every other key `extended_tags` reads.

Signed-off-by: InstaZDLL <github.105mh@8shield.net>
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Actionable comments posted: 1

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Inline comments:
In `@docs/rfcs/RFC-002-waveflow-server-v2.md`:
- Line 55: Document that each ArtistID3 entry in artists[] and albumArtists[]
includes the corresponding artist sortName, matching the existing child artist
and album behavior. Add JSON and XML fixtures covering these fields and verify
the emitted values use the correct artist sort names.
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Comment thread docs/rfcs/RFC-002-waveflow-server-v2.md Outdated
Review read the new sortName sentence as covering the entries of artists[]
and albumArtists[], which it does not. Those entries, and the artist and album
entries getMusicDirectory renders as child, are references rather than
records: id and name, and nothing else — no musicBrainzId, no albumCount, no
starred, no sortName. The RFC never said so, which is what left the reading
open. No wire change.

Signed-off-by: InstaZDLL <github.105mh@8shield.net>
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Inline comments:
In `@docs/rfcs/RFC-002-waveflow-server-v2.md`:
- Line 55: Mettre à jour les projections des références artists[] et
albumArtists[] pour inclure sortName, avec une chaîne vide lorsque la valeur est
inconnue, conformément au contrat ArtistID3. Séparer explicitement cette
projection de celle des enfants Child générés par getMusicDirectory, qui
conserve ses propres champs. Si cette compatibilité n’est pas retenue,
documenter explicitement la déviation dans le RFC et la documentation de
compatibilité, puis ajouter les fixtures JSON/XML correspondantes.
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Comment thread docs/rfcs/RFC-002-waveflow-server-v2.md Outdated
Review offered a choice: carry sortName in the artists[] and albumArtists[]
references, or document the deviation and pin it with fixtures. Taking the
second, because the first inlines a second copy of every artist record into
every track and album payload, on a contract frozen for v2.0-beta and
revalidated on four clients the day before.

It also corrects the previous commit, which lumped the getMusicDirectory
children in with the references and said they carry neither. They do:
directory_child removes musicBrainzId and nothing else, so a browsing child
carries sortName, albumCount and the rest. Measured, not read.

an_artist_reference_is_not_an_artist_record pins both projections against each
other in JSON and XML, so a field added to the artist node cannot leak into
the reference. The vacuity guard earned its place immediately: the folder
listing holds no reference at all when the library has no album-less track,
so the references are read from the album document.

Signed-off-by: InstaZDLL <github.105mh@8shield.net>
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Inline comments:
In `@docs/rfcs/RFC-002-waveflow-server-v2.md`:
- Line 55: Clarify the final sentence so it explicitly identifies the
unsupported fields that are absent rather than empty, while preserving the rule
that supported sortName fields are emitted as empty strings when unknown. Name
the non-implemented fields referenced earlier, such as contributors,
displayComposer, and the unavailable AlbumID3/ArtistID3 metadata.

In `@tests/v2_foundations.rs`:
- Around line 9136-9213: Extend the existing album reference assertions to cover
album["albumArtists"] in JSON and the corresponding XML albumArtists elements,
requiring exactly the whitelist keys/attributes id and name. Preserve the
current artists[] checks and reject sortName, albumCount, or any other ArtistID3
fields for both reference collections.
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Comment thread docs/rfcs/RFC-002-waveflow-server-v2.md Outdated
Comment thread tests/v2_foundations.rs Outdated
…t fields

Two review points, both valid.

The RFC's closing sentence said "Those are absent rather than empty" of a
list that had drifted several sentences away once the sortName paragraph was
inserted in front of it, so its nearest antecedent had become sortName itself
— which is emitted empty. It now names contributors[], displayComposer and the
AlbumID3/ArtistID3 fields it means, and states the distinction outright:
empty means the server reads the tag and this record has none, absent means it
does not read it.

albumArtists[] was documented as a reference and pinned by nothing. It is
emitted on media items rather than on the album — the album's own credit is
artists[] — so it is pinned on a song of the album document, in both
encodings. Both collections now assert the whole attribute set equals
{id, name} rather than rejecting a list of known fields, so a field added to
the artist node fails here even if nobody thought to name it. Verified by
adding sortName to the reference: the assertion reports it.

The XML side splits attributes on the quote rather than on whitespace; the
first attempt read name="The Nocturnes" as two attributes.

Signed-off-by: InstaZDLL <github.105mh@8shield.net>
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Inline comments:
In `@tests/v2_foundations.rs`:
- Around line 9215-9235: Update the attribute validation in the references test
around attributes and the assert_eq! comparison to sort attributes before
comparing them, so XML attribute order is not treated as contractual while still
requiring exactly id and name.
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  • docs/rfcs/RFC-002-waveflow-server-v2.md
  • tests/v2_foundations.rs

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Comment thread tests/v2_foundations.rs
@github-actions github-actions Bot added type: feat New feature and removed type: feat New feature labels Aug 20, 2026
The JSON side already sorted its keys; the XML side compared them in document
order, so it pinned the order the node builder happens to write id and name
in. XML attribute order carries no meaning, and a reordering that changes
nothing observable would have failed the test.

Verified both ways: emitting name before id now passes, and adding albumCount
alongside them still fails. Which attributes are present is the contract; the
order is not.

Signed-off-by: InstaZDLL <github.105mh@8shield.net>
@github-actions github-actions Bot added type: feat New feature and removed type: feat New feature labels Aug 20, 2026
@InstaZDLL
InstaZDLL merged commit 58a8986 into main Aug 20, 2026
14 checks passed
@InstaZDLL
InstaZDLL deleted the feat/oauth-scopes-and-opensubsonic-gaps branch August 20, 2026 11:24
InstaZDLL added a commit that referenced this pull request Aug 20, 2026
The report is a snapshot of main at 1eecc10 and says so, but its section 3
reads as current state, and PR #123 closed all four of its lines this morning.
An addendum at the head of that section says what landed, including that
Access::Unrestricted — the mechanism section 1.1 describes — is gone, replaced
by the scope carrying it was standing in for.

The four-clients-against-five question is left open, because it is a decision
rather than something a merge could close.

Signed-off-by: InstaZDLL <github.105mh@8shield.net>
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Labels

scope: api Native /api/v2 surface scope: auth Authentication, tokens, sessions scope: db SQLite schema, migrations, queries scope: docs Docs, README, assets scope: scanner scope: server Server core (Rust) scope: subsonic Subsonic / OpenSubsonic compatibility size: xl > 500 lines type: feat New feature

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2 participants