forked from akai/readest
Huang Xin
082edc204b
* docs: design for syncing updated book data (cover + file) (#4544) Cover-change sync via a content hash (coverHash = partial MD5 of cover.png) plus a cover_updated_at field-level merge timestamp; file updates ride the existing re-import / metaHash dedupe. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> * fix(sync): sync updated book covers across devices (#4544) Editing a book's cover wrote cover.png locally but changed no hash (the cover is keyed by the file hash), so peers had no signal to re-download it and the change never propagated. Give the cover its own content-addressed version: - coverHash = partial MD5 of cover.png; a peer re-downloads the cover iff the synced hash differs from the local one (idempotent, no churn on identical/re-extracted covers — compatible with the metaHash dedupe). - coverUpdatedAt = field-level LWW timestamp so a page-turn that wins whole-row LWW on updated_at can't clobber a cover edit (mirrors the reading_status_updated_at fix for #4634). Editing a cover recomputes the hash, bumps coverUpdatedAt, and re-uploads only the cover; the server merges cover fields independently; peers re-download on a hash diff. File updates continue to ride the existing re-import / metaHash dedupe (changed file -> changed hash -> re-key). Migration 016 adds cover_hash / cover_updated_at to books. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>