Three endpoints for the admin Settings UI:
- GET /api/admin/cover-sources — lists registered providers with
current settings + capability badges + sources_version
- PATCH /api/admin/cover-sources/{provider_id} — updates enabled
and/or api_key; returns version_bumped: true only when the
enabled set changed
- POST /api/admin/cover-sources/{provider_id}/test — invokes
TestableProvider.TestConnection; returns ok:bool + duration_ms +
error string. Returns 200 in both success and failure cases (the
operation completed; the test result is data, not an error).
api_key is never echoed in GET — replaced with api_key_set: bool
to follow the standard credential-display convention. PATCH
api_key: "" clears; omitting the field leaves it unchanged. PATCH
on an unknown provider_id returns 404.
All under existing RequireAdmin middleware. Routes registered
alongside the library/coverage endpoint in the /api/admin/ tree.
handlers struct gains a coverSettings *coverart.SettingsService
field; server.New + cmd/minstrel/main.go plumb the existing
coverSettings instance through.
coverart.ResetRegistryForTests() exported wrapper added so api
package tests can reset the registry without importing internals.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Rewires EnrichAlbum to iterate EnabledAlbumProviders from the
SettingsService instead of a single hardcoded MBCAA fetcher. Sidecar
layer is unchanged (always tried first). Per-row eligibility check
honors cover_art_sources_version: terminal 'found' values skip;
'none' flips to NULL via ClearAlbumCoverNone and proceeds (the DB-
level ListAlbumsMissingCover query guards the version check for batch
callers; RetryAlbum clears via ClearAlbumCover first); NULL is eligible.
The provider chain uses an inline allWere404 accumulator to settle
the row to 'none' only when every provider returned ErrNotFound.
Any provider returning ErrTransient leaves the row NULL for next-
pass retry — even if other providers returned ErrNotFound — since
the transient call's MBID might succeed on a future attempt.
Boot wiring (cmd/minstrel/main.go) replaces the
NewFetcher+NewEnricher(fetcher, mbcaaOn) shape with
NewMBCAAProviderFromConfig (swaps in production User-Agent on the
registered provider) + NewSettingsService + NewEnricher(settings).
The old cfg.Library.CoverArtFromMBCAA flag is no-op'd; DB-backed
settings replace it. Field stays in the config struct for backward
compat with deployed config files.
Consolidates fetcher.go's HTTP logic into provider_mbcaa.go (no more
wrapper indirection): mbcaaProvider now holds cfg/mu/lastCall/client
directly. Deletes fetcher.go and fetcher_test.go. ErrNotFound and
ErrTransient move into provider.go alongside the other sentinels.
Updates admin_covers_test.go and provider_mbcaa_test.go to the new
constructor shapes. Adds multi-provider-chain, transient-leaves-null,
and stale-none-flips-and-retries test cases in enricher_test.go.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Defines the abstraction every cover-art source will implement:
- Provider — base interface (ID, DisplayName, RequiresAPIKey,
DefaultEnabled, Configure).
- AlbumCoverProvider — opt-in capability for fetching album covers
by MBID.
- ArtistArtProvider — opt-in capability for fetching artist thumb +
fanart atomically by MBID.
- TestableProvider — opt-in capability for the admin Test-Connection
button.
Sentinel ErrNotTestable / ErrProviderNotFound. ErrNotFound and
ErrTransient stay in fetcher.go for now; they move into provider.go
in the next commit when fetcher.go is deleted as part of the MBCAA
refactor.
Compile-time registry: providers register from init() in their own
file. Duplicate IDs panic at startup (compiled-in registration is a
build-time bug, not a runtime concern).
Tests cover: Register adds, duplicate panics, ProviderByID success
+ ErrProviderNotFound, capability-interface filtering via Go type
assertion.
bvandeusen