A request whose book turns out to be in the library is closed with the note `[auto] Already in the library.` instead of sitting in Needs Review. A request an admin handled by hand while a pass was running is skipped. A series label in front of a Calibre title no longer hides an owned book, and a Calibre title marked as another edition (full cast, dramatized, GraphicAudio) is not the book.
When no source matches, up to three simpler forms of the title are tried on each source under the same strict match. Optionally (off by default), an unmatched audiobook request is looked up on Audible US and UK through Audiobookshelf's metadata search and the request says what the store answered. It never declines anything.
A Soulseek peer whose recent transfers all failed, and an AudiobookBay post whose comments say it has no seeders, are tried after the other matches and never excluded. A failed or stalled release is kept out for AUTO_DOWNLOAD_RETRY_FAILED_RELEASE_DAYS and then tried again, and a torrent that died for one request is not offered to another. A request stuck on queued or downloading is settled from the download history. Optionally (off by default) a failed download is retried with another release within minutes.
Adds an Audiobookshelf provider for the library check, next to the Calibre one. It reads the server over its REST API (title, author, ISBN and ASIN per item), answers for audiobooks, and has its settings in General with a test button that uses the unsaved form values. Read only.
The Hardcover sync and automatic downloads now fail closed when an enabled library cannot be read: the sync skips its cycle and an automatic download holds the request. A library that listed items at the last index and now lists none counts as a failed read. Badges still fail open.
Per discussion #1372, where you said you were fine with this specific
implementation: check whether metadata.db exists, read it if so, and
show a check mark saying the book is already there.
Searching for a book you already own gives no hint that you own it, so
the easiest way to end up with a second copy is to not remember you have
the first. This reads a Calibre `metadata.db`, read only, and marks
matching results with an **In library** badge in the card, list and
compact views and in the details dialog.
Off by default. It sits in Settings, General beside the existing Library
URL, with a test button that reports how many books it indexed. No HTTP
call, no token, nothing written back.
Matching runs most to least confident: a shared external id, then an
ISBN compared in both ISBN-10 and ISBN-13 form, then fuzzy title tokens
plus the author surname. The check fails open, so an unreadable database
degrades the badge and never blocks a search, and entries are cached for
ten minutes with an early refresh when the file changes, so a large
library costs one read rather than one per search.
`text_match.py` is new and shared by the index and the provider, so
title, author and ISBN matching stays consistent in one place.
## On the provider interface
`library_index` talks only to a `LibraryProvider` protocol and knows
nothing about Calibre. That is deliberate but it is not speculative
generality, it is what let me send you the Calibre half on its own: I
run an Audiobookshelf provider on the same interface in my fork, which
is where the audiobook side of the badge comes from. I have left that
out because it is a new service integration rather than something
already in the codebase, which is the line your non-goals draw. Happy to
send it separately if you ever want it, and equally happy for the answer
to be no.
Adding a library is a module with the `LibraryProvider` shape plus one
line in `all_providers()`.
## Verification
- `tests/core/test_library_index.py`: id, ISBN and fuzzy matching,
per-content-type provider selection, fail-open on provider errors,
stale-cache reuse, TTL and fingerprint refresh, per-provider cache
isolation, and the test-connection path including unsaved form values.
- `tests/core/test_text_match.py`: ISBN variants and token matching.
- `src/frontend/src/tests/libraryBadge.test.ts` and the added cases in
`bookTransformers.test.ts`.
- Python suite (3269) and frontend suite (206) green, plus ruff, ruff
format, basedpyright, vulture, tsc, oxlint, oxfmt and the production
build.
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