df740d3e1a
- jobs: a table-backed queue in the same SQLite file. No Redis, no second process, included in the same backup. claim() is a single UPDATE...RETURNING so a job cannot run twice even with several workers. Failures back off exponentially; a missing handler fails permanently rather than retrying a bug. - metadata: Provider interface plus Open Library and Google Books (both keyless). The enricher tries providers in registration order, falls back on empty, and continues past a provider error. - migration 0004: metadata_fetch records the attempt, not just the match, so a rescan does not re-hammer a rate-limited API for an item that will never match. Errors are always retried; ok/notfound are cached for 30 days. - enrichment writes provider_ids, updates title/year, links authors through people/item_people, and downloads the cover as an asset. The cover download runs outside the transaction: a slow image host must not hold a write lock. - endpoints: queue enrichment per library, and inspect an item's matches. - web: Enrich button per library. Verified live against Open Library: "The Hobbit" matched /works/OL27482W, title and year 1937 written, a 301x500 JPEG cover downloaded and served.
16 lines
730 B
SQL
16 lines
730 B
SQL
-- 0004_metadata.sql — record which providers have been tried for an item.
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--
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-- provider_ids records the match that was chosen. This table records the
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-- attempt, including failures, so a rescan or a restart does not re-hammer a
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-- rate-limited API for an item that will never match.
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CREATE TABLE metadata_fetch (
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item_id INTEGER NOT NULL REFERENCES media_items(id) ON DELETE CASCADE,
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provider TEXT NOT NULL,
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status TEXT NOT NULL, -- ok | notfound | error
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detail TEXT NOT NULL DEFAULT '',
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fetched_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ','now')),
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PRIMARY KEY (item_id, provider)
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);
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CREATE INDEX idx_metadata_fetch_item ON metadata_fetch(item_id);
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