Implements qbz-nix-docs/deferred-2.0.3/playlist-importer-expansion-design.md,
whose §11 the owner ratified 2026-07-31. PlaylistSource is an enum, not a trait
(ADR-007): the set is closed, there is no plugin story, and every arm resolves
to the same ImportPlaylist the URL scrapers already produce — so the matcher,
the 2000-track split, the sink and the summary never learn a second kind of
source exists.
import_prepared_playlist takes the playlist BY VALUE and
import_public_playlist becomes a shim. That kills the double scrape the Tauri
re-fetch-on-execute left behind, and it is not optional for the new sources:
the rfd bytes of a picked file are gone by execute time and the dialog cannot
silently reopen. It also closes a real race — open() resets the session, so a
modal reopened between the Import click and the task's read handed a detached
task None.
FILES read the track list ONLY. The paths inside are never opened, copied or
added to the Local Library, and the modal says so in a persistent row rather
than a tooltip. Content sniffing beats the extension, with an HLS guard because
.m3u8 is also the stream-manifest extension, and a utf8-then-Windows-1252
fallback because .m3u and .pls predate UTF-8 and "Björk" has to stay matchable.
JSON locates the track list BY SHAPE. Depth is a DoS bound, not a locator: the
array sits at 0, 1, 2 or 3 levels depending on the export, and a hard two-level
rule drops an ordinary GraphQL envelope. Container demotion keeps a discography
from importing album names as track titles. Walls at 16 MiB, depth 8, 2M nodes
and 10k tracks.
SERVICES are public reads with no authentication; a connected account only
prefills the field. No qbz-integrations edge — its ListenBrainz client returns
tracks with no duration and drops the playlist title, both verified in its
source, and a direct GET /1/playlist/<mbid> reads all three in one request.
A Last.fm STATION IS A RADIO, and ?page=N is not pagination. Measured against a
live profile: pages 1 and 2 overlapped and batch sizes varied (20, 20, 36). The
first cut fetched 20 pages, never hit its empty-page exit, and returned 469 rows
holding 198 distinct tracks. It now dedupes as it draws, stops after two dry
draws, and stops at MAX_STATION_TRACKS = 200 — the number shown in "Found N
tracks" has to be one we can deliver, and a station is dynamic enough that a
bigger single import buys little (owner ruling: no false expectations of
"traeré casi 500" when we bring half). A failed draw no longer fails an import
that already has rows; Last.fm rate-limits a burst of these.
The summary reports THREE DISJOINT NUMBERS that sum to the total. skipped is
now counted from the matches that found nothing, not inferred as
total - matched, which folded duplicates into failures: that same import told
the user 271 tracks were skipped when 255 of them had matched perfectly well
and been deduplicated before the add.
23 new strings across the seven translated locales; en is the sparse fallback
catalogue and needs none.
cc
Add-to-playlist (Slices 0-3):
- qbz-core: check_playlist_duplicates + pure compute_playlist_duplicates
(reuses qbz_models::PlaylistDuplicateResult) + unit tests.
- PlaylistDuplicateConfirmModal (Add all / Add new only / Cancel); the
duplicate check runs on the Qobuz->Qobuz picker branch only (local/Plex
add directly, mirroring Tauri); the track-id Vec lives Rust-side in a
stash, never in Slint.
- Inline create-and-add in the picker (online create_playlist, offline ->
local playlist per D8) + client-side filter (Slint 1.16 has no string
contains, routed through a Rust callback) + success toasts.
Playlist importer (1:1 Tauri port):
- New headless crate qbz-playlist-import (Spotify/Apple/Tidal/Deezer
scrapers, Qobuz matcher, importer, progress sink, shared http client;
copy-not-move from src-tauri, zero tauri deps; 40 unit tests green).
- PlaylistImportModal (two-step fetch-preview -> import with live progress
bar / log / summary) + controller + sidebar PLAYLISTS menu entry point.
Reco logging staged behind TODO(reco-v1) markers (golden rule: playlist
recommendations ship in Slint v1 once the reco engine is extracted to a
shared crate).
cc
vicrodh