bvandeusen
63b25e65ad
GET /api/artists/{id}/similar — in-library artists ranked by similarity
score (deduped across sources), ArtistRef list with cover + album count.
GET /api/artists/{id}/top-tracks — current user's most-played tracks for
the artist (skips excluded, quarantine filtered).
89 lines
3.2 KiB
SQL
89 lines
3.2 KiB
SQL
-- name: ListPlayedTracksNeedingSimilarity :many
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-- Tracks with at least one play, an MBID, and no fresh listenbrainz row
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-- (no row at all, OR fetched_at older than 7 days). Used by the worker
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-- to find work each tick. Bounded by $1.
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SELECT DISTINCT t.id, t.mbid
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FROM tracks t
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JOIN play_events pe ON pe.track_id = t.id
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WHERE t.mbid IS NOT NULL
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AND NOT EXISTS (
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SELECT 1 FROM track_similarity ts
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WHERE ts.track_a_id = t.id
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AND ts.source = 'listenbrainz'
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AND ts.fetched_at > now() - interval '7 days'
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)
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ORDER BY t.id
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LIMIT $1;
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-- name: ListPlayedArtistsNeedingSimilarity :many
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SELECT DISTINCT ar.id, ar.mbid
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FROM artists ar
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JOIN tracks t ON t.artist_id = ar.id
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JOIN play_events pe ON pe.track_id = t.id
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WHERE ar.mbid IS NOT NULL
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AND NOT EXISTS (
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SELECT 1 FROM artist_similarity asim
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WHERE asim.artist_a_id = ar.id
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AND asim.source = 'listenbrainz'
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AND asim.fetched_at > now() - interval '7 days'
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)
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ORDER BY ar.id
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LIMIT $1;
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-- name: GetTracksByMBIDs :many
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-- Bulk in-library lookup: maps a slice of MBIDs back to local track IDs.
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SELECT id, mbid FROM tracks WHERE mbid = ANY($1::text[]);
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-- name: GetArtistsByMBIDs :many
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SELECT id, mbid FROM artists WHERE mbid = ANY($1::text[]);
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-- name: UpsertTrackSimilarity :exec
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INSERT INTO track_similarity (track_a_id, track_b_id, score, source, fetched_at)
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VALUES ($1, $2, $3, 'listenbrainz', now())
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ON CONFLICT (track_a_id, track_b_id, source)
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DO UPDATE SET score = EXCLUDED.score, fetched_at = EXCLUDED.fetched_at;
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-- name: UpsertArtistSimilarity :exec
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INSERT INTO artist_similarity (artist_a_id, artist_b_id, score, source, fetched_at)
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VALUES ($1, $2, $3, 'listenbrainz', now())
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ON CONFLICT (artist_a_id, artist_b_id, source)
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DO UPDATE SET score = EXCLUDED.score, fetched_at = EXCLUDED.fetched_at;
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-- name: UpsertArtistSimilarityUnmatched :exec
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-- Persists an out-of-library similar-artist MBID. Idempotent on
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-- (seed_artist_id, candidate_mbid, source) — re-fetches refresh the
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-- name/score and bump fetched_at.
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INSERT INTO artist_similarity_unmatched (
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seed_artist_id, candidate_mbid, candidate_name, score, source
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) VALUES ($1, $2, $3, $4, $5)
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ON CONFLICT (seed_artist_id, candidate_mbid, source) DO UPDATE SET
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candidate_name = EXCLUDED.candidate_name,
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score = EXCLUDED.score,
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fetched_at = now();
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-- name: ListSimilarArtistsForArtist :many
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-- In-library artists similar to a seed artist, ranked by best similarity
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-- score across sources (deduped per candidate). cover_album_id + album_count
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-- mirror ListArtistsAlphaWithCovers so the strip renders identical cards.
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SELECT sqlc.embed(artists),
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cov.id AS cover_album_id,
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cnt.album_count::bigint AS album_count
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FROM (
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SELECT artist_b_id, max(score) AS sim_score
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FROM artist_similarity
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WHERE artist_a_id = sqlc.arg(seed_artist_id)
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GROUP BY artist_b_id
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) s
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JOIN artists ON artists.id = s.artist_b_id
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LEFT JOIN LATERAL (
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SELECT id FROM albums
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WHERE artist_id = artists.id AND cover_art_path IS NOT NULL
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ORDER BY created_at DESC LIMIT 1
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) cov ON true
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LEFT JOIN LATERAL (
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SELECT count(*) AS album_count
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FROM albums WHERE artist_id = artists.id
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) cnt ON true
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ORDER BY s.sim_score DESC, artists.sort_name
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LIMIT sqlc.arg(result_limit);
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