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feat(v3): sort the library by mastery (needs-practice / most-mastered)

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Adds two sort options to the Songs library: "Needs practice first" (weakest
measured accuracy first) and "Most mastered first". Mastery = MAX(best_accuracy)
across a song's arrangements, from song_stats; because that's a separate table
it's a correlated subquery in the ORDER BY, so these sorts use OFFSET paging like
tuning/year. Unscored ("not started") songs always sort to the bottom in both
directions, so a large unpracticed library doesn't bury the songs you're
actually working on. Never the default.

Verified against a running server: scored songs at 0.90 / 0.30 plus unscored ->
ascending orders 0.30, 0.90, unscored; descending 0.90, 0.30, unscored.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QbexxfTt8q2tAn436MqGWF
This commit is contained in:
ChrisBeWithYou
2026-07-01 05:49:19 -05:00
co-authored by Claude Opus 4.8
parent f9607c5c94
commit eba20b39fb
2 changed files with 17 additions and 0 deletions
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server.py
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@@ -2153,6 +2153,20 @@ class MetadataDB:
# '2005' rather than alphabetic.
"year": "(year = '') ASC, CAST(year AS INTEGER) ASC",
"year-desc": "(year = '') ASC, CAST(year AS INTEGER) DESC",
# Mastery = best accuracy across a song's arrangements, from the
# separate song_stats table (so via a correlated subquery — this sort
# drops to OFFSET paging, like tuning/year). Unscored ("not started")
# songs push to the BOTTOM in both directions (the IS NULL term);
# ascending is "needs practice first" (weakest measured first),
# descending is "most mastered first".
"mastery": (
"((SELECT MAX(best_accuracy) FROM song_stats s WHERE s.filename = songs.filename) IS NULL) ASC, "
"(SELECT MAX(best_accuracy) FROM song_stats s WHERE s.filename = songs.filename) ASC"
),
"mastery-desc": (
"((SELECT MAX(best_accuracy) FROM song_stats s WHERE s.filename = songs.filename) IS NULL) ASC, "
"(SELECT MAX(best_accuracy) FROM song_stats s WHERE s.filename = songs.filename) DESC"
),
}
order = sort_map.get(sort, "artist COLLATE NOCASE")
# Legacy `dir=desc` toggle: only safe to append on simple sort