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Author SHA1 Message Date
Broque Thomas
017553193f Extract automation handlers (3/3): maintenance + misc, finishing the lift
Final commit of the automation-handler refactor. With this commit
every closure that used to live in
`web_server._register_automation_handlers` is now a top-level
function in `core/automation/handlers/`.

Handlers extracted in this commit:

- start_database_update + deep_scan_library
    -> core/automation/handlers/database_update.py
    Both share the db_update_state monitoring pattern (poll until
    status flips, stall detection emits warning at 10 min, 2-hour
    outer timeout). Lifted into a shared `_run_with_progress` helper
    inside the module so the per-handler bodies stay tiny.

- run_duplicate_cleaner -> core/automation/handlers/duplicate_cleaner.py
- start_quality_scan    -> core/automation/handlers/quality_scanner.py

- clear_quarantine, cleanup_wishlist, update_discovery_pool,
  backup_database, refresh_beatport_cache
    -> core/automation/handlers/maintenance.py
    Grouped because each body is short (~20-50 lines) and they share
    no state — splitting into per-handler files would just add import
    noise.

- clean_search_history, clean_completed_downloads, full_cleanup
    -> core/automation/handlers/download_cleanup.py
    Grouped because all three reach the download orchestrator,
    tasks_lock, and download_batches/download_tasks accessors. The
    full_cleanup multi-step orchestration shares phase-detection
    logic with clean_completed_downloads.

- run_script         -> core/automation/handlers/run_script.py
- search_and_download -> core/automation/handlers/search_and_download.py

`AutomationDeps` grew with the new dependency surface:
- get_db_update_state + db_update_lock + db_update_executor +
  run_db_update_task + run_deep_scan_task
- get_duplicate_cleaner_state + duplicate_cleaner_lock +
  duplicate_cleaner_executor + run_duplicate_cleaner
- get_quality_scanner_state + quality_scanner_lock +
  quality_scanner_executor + run_quality_scanner
- download_orchestrator + run_async + tasks_lock +
  get_download_batches + get_download_tasks +
  sweep_empty_download_directories + get_staging_path
- docker_resolve_path + get_current_profile_id +
  get_watchlist_scanner + get_app + get_beatport_data_cache
- set_db_update_automation_id (writes the legacy global so the live
  DB-update progress callbacks still living in web_server.py keep
  emitting against the active automation card)

`web_server._register_automation_handlers` is now ~50 lines: build
deps once, call register_all. The 667-line block of remaining
closure definitions and engine register calls is gone.

The final orphan was the `_db_update_automation_id` module global —
the DB-update progress callbacks at line ~14080 still read it
directly, so the extracted database_update handler propagates the
automation id through `deps.set_db_update_automation_id` (a closure
in web_server that writes the global). When the legacy callbacks
get extracted in a future PR the setter goes away.

Tests:
- tests/automation/test_handlers_maintenance.py adds 21 boundary
  tests covering every newly-extracted handler shape: guard
  short-circuits (already-running returns skipped), deps wiring
  (set_db_update_automation_id called with the right id),
  exception swallow contract, status returns, path-traversal
  blocked in run_script, source-mode skip in clean_search_history,
  active-batch skip in clean_completed_downloads, etc.
- 3244 tests pass (was 3223 — 21 new), no regression.

web_server.py: 35,593 -> 34,220 lines (-1,373 net across 3 commits).
Issue #1 from the extraction punch list is now COMPLETE.
2026-05-15 11:24:35 -07:00