The platform had three duplicated, divergent book resolvers (koreader,
kobo, BookMatchingService) and none of them consulted
media_item_formats.file_sha256 - per-format hashes for converted files
(KEPUB, PDF) are computed and stored at import/conversion time but were
never used for lookup. GetMediaItemFormatBySHA256 existed with zero
callers. Any client holding a converted file could never match by
hash.
Add internal/services/book_resolver.go: a single shared resolution
path from client-supplied identifier to media_item.
ResolveBySHA256 checks media_items.file_sha256 first (indexed
GetMediaItemBySHA256), then falls back to media_item_formats.
file_sha256 (indexed GetMediaItemFormatBySHA256, first caller) so a
converted format matches with equal confidence. The import-time
SHA-256 is the canonical identifier shared by every interface.
Wire two of the existing resolvers through it:
- BookMatchingService.matchBySHA256: replaces the in-memory
ListMediaItems scan of up to 1000 rows with the resolver's indexed
lookups, and gains format awareness for the link/auto-link UI.
MatchMethod now reports sha256_sha256 or sha256_sha256_format
- KoboHandler.mapContentIdToBookhoardUUID: the SHA-256 heuristic
branch (ContentId that looks like a 64-char hash) now resolves
format-aware too. Kobo's entitlement_id wire identity is untouched;
only the opportunistic hash branch changed
john-okeefe
60a94df8e1