[InstaZDLL]

Step 2 of RFC-013: an artist's portrait and banner, chosen by hand, stored and served. The web client comes in step 3, and the Deezer candidates in step 4.

Schema

migrations-v2/20261023000000_artist_image_choice.sql creates artist_image_choice(artist_id, kind, artwork_hash, source, set_by, set_at):

• kind is portrait or banner; source is upload or deezer;
• the primary key is (artist_id, kind), and the artist row is per library;
• the key to artwork deliberately has no ON DELETE: a sweep that forgot the table would fail rather than leave a choice pointing at nothing.

Server

• Effective portrait, everywhere. artist_select! now reads COALESCE(chosen portrait, ar.artwork_hash) AS artwork_hash, which reaches every artist listing, the artist page, search, and the ArtistItem that Subsonic's coverArt is rendered from. Subsonic gains no element and loses none: only the image coverArt names changes (decision 3).
• It outlives RFC-011's fill. link_portrait_in keeps rewriting artist.artwork_hash and never sees the choice, so the choice keeps winning.
• Artwork route. GET /api/v2/artwork/{id} serves a chosen image to the members of the library whose artist names it, and an artist id resolves to the effective portrait.
• ArtistDetail gains banner_hash (absent when none) and image_choice.{portrait,banner}.{source,set_at} (absent when nothing was chosen). The web client's "portrait from Deezer" note keys on the enrichment hash, so it never claims a chosen image came from Deezer.
• Routes:
  • PUT /api/v2/artists/{id}/image/{portrait|banner}: raw bytes, recognised as JPEG, PNG or WebP from the bytes (Portrait::from_bytes). The route's own body limit is portrait::MAX_IMAGE_BYTES (10 MiB), so a larger body gets 413. Anything else gets 422, an unknown kind 404. Answers the artist page.
  • DELETE /api/v2/artists/{id}/image/{kind}: back to automatic, 204, or 404 when nothing was chosen.
  • Both are for owners and managers (may_write_metadata). Everyone else gets the 404 a stranger gets.
• Writes:
  • the file is stored content-addressed (portrait::store) before the writer gate, as file I/O;
  • access is checked before the file is written, so a refused upload leaves nothing in the store, and checked again under the gate;
  • the artwork row and the choice are written in one transaction with the artist library event (RFC-007).
• Sweep: forget_unreferenced_artwork keeps any artwork row a choice names.

Tests

chosen_artist_images_lead_every_reader_and_outlive_the_portrait_fill (native_api) covers:

• the provider portrait before any choice;
• a chosen portrait, which leads, says upload, and records an event;
• a banner alongside it;
• the listing, services.artist (what Subsonic renders from), and the artwork route by hash and by artist id, byte for byte;
• the stranger's 404 on the banner;
• the provider's portrait rewritten while the choice holds;
• the sweep keeping both rows;
• listener and stranger refused, with no file left;
• 422, 413 at 10 MiB + 1, 404 for an unknown kind, and 200 at exactly 10 MiB;
• removal back to the latest provider portrait with no banner, two events, and a 404 on a repeated removal.

Each of the eight safeguards fails the test when removed: the effective portrait in the projection, the route by hash, the route by id, the sweep, the role check, the event, the check before writing the file, and the body limit. Each line hit is distinct.

Validation

• cargo fmt --all --check, cargo clippy --all-targets --all-features -- -D warnings
• cargo test --all-features, all targets
• RFC-013's Implemented by line names docs: RFC-013, a chosen artist portrait and banner #308 and this PR.

Summary by CodeRabbit

• Nouvelles fonctionnalités
  • Les propriétaires et gestionnaires peuvent choisir un portrait et une bannière pour un artiste, ou supprimer leur choix afin de rétablir l’image automatique.
  • Les membres de la bibliothèque peuvent consulter les images choisies. Les formats JPEG, PNG et WebP sont acceptés, jusqu’à 10 Mio.
• Documentation
  • Le RFC associé indique que sa mise en œuvre est en cours.

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• docs/rfcs/RFC-013-chosen-artist-imagery.md

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📝 Walkthrough

La PR ajoute le choix manuel d’un portrait ou d’une bannière pour un artiste. Elle stocke ces choix, fournit des routes pour les modifier et les supprimer, et les expose dans les données de l’artiste. Les tests couvrent l’accès aux images et leur conservation par le balayage du stockage.

Changes: Choix d’images d’artiste

Layer / File(s)	Summary
Contrats et stockage des choix migrations-v2/20261023000000_artist_image_choice.sql, src/services/mod.rs, src/services/artist_images.rs, src/portrait.rs	La migration ajoute la table des choix de portrait et de bannière. Les services valident les images, contrôlent les droits d’écriture et enregistrent ou suppriment les choix.
Routes d’écriture src/api/catalog.rs, src/api/mod.rs, src/lib.rs, docs/rfcs/RFC-013-chosen-artist-imagery.md	Les routes PUT et DELETE modifient les choix d’image. L’envoi limite le corps à la taille maximale définie pour les images. Le RFC indique l’état d’implémentation et associe les PR concernées.
Lecture et conservation des images src/services/artist_images.rs, src/services/artists.rs, src/services/mod.rs, src/services/catalog.rs, src/services/artwork.rs, tests/native_api.rs	Le portrait choisi remplace le portrait fournisseur effectif, et les données d’artiste incluent le choix ainsi que le hash de bannière. Le balayage conserve les œuvres référencées par un choix. Les tests vérifient les droits d’accès, les limites d’envoi, la lecture et la suppression.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~25 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant Client
  participant put_artist_image
  participant choose_artist_image
  participant artist_image_choice
  Client->>put_artist_image: Envoie une image
  put_artist_image->>choose_artist_image: Transmet artiste, type et octets
  choose_artist_image->>artist_image_choice: Enregistre le choix
  choose_artist_image-->>put_artist_image: Confirme l’enregistrement
  put_artist_image-->>Client: Renvoie ArtistDetail

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Possibly related PRs

• InstaZDLL/waveflow-server#308 — Définit RFC-013 et les contrats de choix de portrait et de bannière que cette PR implémente.

Merge Risk: ⚪ Minimal · up to 26ca7

No actionable merge-blocking risk remains in the supplied change.

Architecture risk: 🔵 Low · up to 26ca7

The change affects 4 systems.

Changed systems: src, docs, migrations-v2, tests

Architecture concerns
No architecture-level concerns identified.

Review details

Systems and components

• observed — src (service) was modified; 9 changed files map to changed impact.
• observed — docs (service) was modified; 1 changed file maps to changed impact.
• observed — migrations-v2 (service) was modified; 1 changed file maps to changed impact.
• observed — tests (service) was modified; 1 changed file maps to changed impact.

Before / after behavior

• observed — Modified behavior in migrations-v2/20261023000000_artist_image_choice.sql: Ajout de artist_image_choice, avec une clé primaire composée de artist_id et kind, des contraintes de valeurs pour kind et source, une référence à artist(id) avec suppression en cascade et une référence à artwork(hash). La table est STRICT; un index sur artwork_hash est également créé.
• observed — Modified behavior in src/api/catalog.rs: Ajout de put_artist_image, route PUT protégée par l’accès en écriture. Elle rejette les types d’image inconnus avec 404, transmet les octets au service, puis récupère et renvoie la page de l’artiste. La documentation déclare les formats JPEG, PNG et WebP, une limite de 10 Mio et les réponses possibles.
• observed — Modified behavior in src/api/catalog.rs: Ajout de delete_artist_image, route DELETE protégée par l’accès en écriture. Elle rejette les types inconnus avec 404, appelle le service de suppression et renvoie 204 si l’opération réussit ; les erreurs du service sont converties en erreur API.
• observed — Modified behavior in src/api/mod.rs: Le routeur expose l’envoi et la suppression d’images d’artiste via put_artist_image et delete_artist_image. Le corps de la requête est limité à crate::portrait::MAX_IMAGE_BYTES.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 73.68% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 19 functions across 10 files. (1 skipped:…	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Title check		Le titre décrit clairement la fonctionnalité principale : le choix manuel du portrait et de la bannière d’un artiste.
Description check		La description présente le contexte RFC-013, le schéma, les routes, les permissions, les limites d’upload, les transactions, le balayage du stockage et les tests exécutés. Elle ne reprend pas exacteme…
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Description check

Explanation

La description présente le contexte RFC-013, le schéma, les routes, les permissions, les limites d’upload, les transactions, le balayage du stockage et les tests exécutés. Elle ne reprend pas exactement toutes les sections du modèle et ne contient pas la confirmation DCO explicite, mais les informations essentielles sont présentes.

Full details: Docstring Coverage

Explanation

Docstring coverage is 73.68% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 19 functions across 10 files. (1 skipped: 1 unsupported.)

Resolution

Write docstrings for the functions missing them to satisfy the coverage threshold.

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• docs/rfcs/RFC-013-chosen-artist-imagery.md
• migrations-v2/20261023000000_artist_image_choice.sql
• src/api/catalog.rs
• src/api/mod.rs
• src/lib.rs
• src/portrait.rs
• src/services/artist_images.rs
• src/services/artists.rs
• src/services/artwork.rs
• src/services/catalog.rs
• src/services/mod.rs
• tests/native_api.rs

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