Completes the crate extraction (Slice 0 backend half):
- state: OfflineCacheState holder (db/fetcher/cache_dir/limit/semaphore/
library_db + dir-layout helpers + new/init_at/teardown). apply_persisted_limit
now takes Option<u64> (the caller reads it from offline_settings) instead of
borrowing src-tauri's OfflineState, so the struct is frontend-agnostic and
Slint can own one too.
- purge: purge_all_cached_files takes &Mutex<Option<LibraryDatabase>> directly
instead of src-tauri's LibraryState wrapper.
The crate is now self-contained (13 modules, no Tauri). Next: re-wire the
Tauri commands onto it with an app.emit-backed CacheEventSink and delete the
old src-tauri/src/offline_cache/ module.
cc
Moves the download pipeline into the crate and removes its Tauri coupling:
- event: new CacheEvent enum (Started/Progress/Completed/Processed/Failed/
UnlockStart/UnlockEnd) + CacheFormat + the CacheEventSink callback type.
- downloader: StreamFetcher + try_cmaf_offline_download + spawn_track_cache_download
now report through a &CacheEventSink instead of tauri AppHandle::emit. The
CoreBridge param is gone — both the CMAF raw download, metadata fetch, and the
legacy stream-url fallback unify on a single core qbz_qobuz::QobuzClient handle.
TLS uses the workspace rustls (same backend qbz-qobuz uses for all CDN traffic).
- playback: adds load_cmaf_bundle_with_ui_events that emits UnlockStart/UnlockEnd
through the sink (the pure load_cmaf_bundle is unchanged).
Crate compiles headless; 5 unit tests pass. Remaining for Slice 0:
OfflineCacheState + purge, then re-wire the Tauri commands with an
app.emit-backed sink and delete the old src-tauri module.
cc
Continues Slice 0. Moves the near-pure modules, re-pointing the src-tauri
client/library types to the core crates (the make-or-break for a mechanical
extraction — verified the field shapes match):
- metadata: fetch_complete_metadata now takes &qbz_qobuz::QobuzClient (was
crate::api::QobuzClient); body compiles unchanged against qbz_models.
- migration: crate::api::QobuzClient -> qbz_qobuz::QobuzClient,
crate::library::database::LibraryDatabase -> qbz_library::LibraryDatabase,
super::metadata -> crate::metadata.
- playback: the PURE load_cmaf_bundle fn (the UI-events wrapper stays out —
it becomes a CacheEventSink call in the next commit).
Deps added: qbz-models, qbz-library, tokio, reqwest, lofty. Crate compiles.
purge + OfflineCacheState + downloader (CacheEvent) remain.
cc
Slice 0 of the offline-cache port (extraction per ADR-006). Creates the new
qbz-offline-cache workspace crate and moves the tauri-free leaf modules out of
src-tauri/src/offline_cache/ verbatim:
- types: the shared serde DTOs (was inline in offline_cache/mod.rs)
- db: the SQLite cached_tracks index (super:: -> crate::types)
- secret_vault, cmaf_store, path_validator: moved verbatim
- maintenance: super:: refs re-pointed to crate::
src-tauri is untouched and keeps its own copy, so the production build stays
green; the re-point + delete happens at the end of Slice 0. Crate compiles
in isolation and all 5 unit tests pass.
Remaining for Slice 0: playback pure-fn split, metadata/migration/purge
(re-point crate::api/crate::library -> qbz_qobuz/qbz_library), the downloader
+ CacheEvent/CacheEventSink abstraction, the OfflineCacheState struct, then
re-wire the Tauri commands and delete the old module.
cc
vicrodh