Content duplicates (same library + file_sha256 at different paths,
e.g. the same book imported twice under two names on a preexisting
database) cannot be auto-collapsed the way path duplicates were:
keeping both copies may be intentional. Surface them for an explicit
admin decision instead.
Schema:
- new hash_conflicts table keyed (library_id, file_sha256) with a
status/resolution lifecycle: 'pending' until an admin resolves via
'keep_all' or 'kept:<uuid>' (which copy was kept after merging)
- resolution is VARCHAR(50) - 'kept:<uuid>' is 41 chars; include a
widening ALTER for databases created with the initial 30-char width
- resolution/resolved_by/resolved_at record who decided what and when
Queries:
- ListMediaItemsMissingHash: items imported before hashing existed
(file_sha256 IS NULL), ordered oldest-first for the backfill pass
- FindHashConflictGroups: the content-duplicate group detection
(GROUP BY library_id, file_sha256 HAVING COUNT(*) > 1)
- ListMediaItemsBySHA256AndLibrary: full membership of one group
- CreateHashConflict: upsert with DO NOTHING so already-tracked groups
are untouched - critical behavior: a group an admin resolved as
'keep both' is never re-flagged by later sweeps
- ListPendingHashConflicts: admin listing with library name and live
item counts (items may have been deleted since flagging)
- GetHashConflict / ResolveHashConflict: lifecycle
- GetMediaItemUsageCounts: per-item progress/highlight/bookmark/note/
collection counts so the admin can make an informed keep choice
- ReparentMediaItemChildren: sqlc binding for the existing
reparent_media_item_children() migration function, used to merge a
losing copy's child rows into the kept copy
john-okeefe
0c39e04e4a