bvandeusenandClaude Opus 5.5
5b372f61d7
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A single and the album it is on stay two files, since each fulfils its own
release in Lidarr, but they are one song to the listener.
- tracks.song_id links copies; the generated song_key (song_id, else the
track's own id) is what they share (migration 0076).
- The resolver links each cross-release group every pass (idempotent; only
with auto-resolve on) and, when a link is new, shares existing likes across
the song and logs them for sync.
- A like or unlike (web and Subsonic) reaches every copy; each change is
logged and published so clients update every heart.
- The Liked list and its count show the song once; Shuffle and the mix writer
take one copy per song.
- A merge keeps the removed copy's song link; "Not the same song" on the
Across releases tab dismisses the group and undoes the link.
Shared plays ("heard via another copy") are left for a later step.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
56 lines
2.1 KiB
SQL
56 lines
2.1 KiB
SQL
-- Song links (M498 #5438): copies of one song on different releases share a
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-- song_key (migration 0076).
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-- name: LinkTracksAsSong :one
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-- Links the tracks into one song, joining any songs they already belong to.
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-- The song keeps the lowest key among them, so linking the same set again
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-- changes nothing. Returns that key and how many tracks moved to it.
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WITH keys AS (
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SELECT DISTINCT song_key FROM tracks WHERE id = ANY(sqlc.arg(track_ids)::uuid[])
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), target AS (
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SELECT song_key FROM keys ORDER BY song_key LIMIT 1
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), moved AS (
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UPDATE tracks t
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SET song_id = (SELECT song_key FROM target)
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WHERE t.song_key IN (SELECT song_key FROM keys)
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AND t.song_key <> (SELECT song_key FROM target)
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RETURNING t.id
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)
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SELECT (SELECT song_key FROM target)::uuid AS song_key,
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(SELECT count(*) FROM moved)::bigint AS moved;
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-- name: ShareSongLikes :many
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-- A like on any copy of the song becomes a like on every copy, dated the
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-- earliest. Returns the likes added, for the sync log.
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INSERT INTO general_likes (user_id, track_id, liked_at)
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SELECT l.user_id, t.id, min(l.liked_at)
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FROM general_likes l
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JOIN tracks lt ON lt.id = l.track_id
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JOIN tracks t ON t.song_key = lt.song_key
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WHERE lt.song_key = sqlc.arg(song_key)::uuid
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GROUP BY l.user_id, t.id
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ON CONFLICT (user_id, track_id) DO NOTHING
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RETURNING user_id, track_id;
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-- name: UnlinkDuplicateGroupSongs :exec
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-- "Not the same song": the group's copies stop sharing a song. Likes already
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-- shared stay where they are.
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UPDATE tracks SET song_id = NULL
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WHERE song_id IS NOT NULL
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AND id IN (SELECT track_id FROM duplicate_group_members WHERE group_id = sqlc.arg(group_id));
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-- name: ListTrackSongKeys :many
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SELECT id, song_key FROM tracks WHERE id = ANY(sqlc.arg(ids)::uuid[]);
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-- name: MergeInheritSongLink :exec
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-- A merge keeps the removed copy's song link: when the copy being removed was
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-- linked to copies on other releases and the survivor was not, the survivor
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-- joins that song.
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UPDATE tracks s
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SET song_id = l.song_key
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FROM tracks l
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WHERE s.id = sqlc.arg(survivor_id)::uuid
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AND l.id = sqlc.arg(loser_id)::uuid
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AND s.song_id IS NULL
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AND l.song_key <> l.id;
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