music_library/backlog/completed/ml-64 - Split-ScrobbleActivity-into-focused-modules.md

id, title, status, assignee, created_date, labels, dependencies, references, priority

id	title	status	assignee	created_date	labels	dependencies	references	priority
ML-64	Split ScrobbleActivity into focused modules	Done		2026-04-20 08:54			https://github.com/cloud8421/music_library/issues/111	low

Description

GitHub: created 2026-03-12 · updated 2026-03-12 · closed 2026-03-12

Problem

MusicLibrary.ScrobbleActivity bundles three distinct responsibilities: (1) scrobbling to Last.fm, (2) track CRUD and listing, (3) data quality diagnostics. The track listing query is nearly identical to ListeningStats.recent_activity/2.

Proposed solution (Option A)

1. Move track CRUD + listing into ListeningStats
2. Keep ScrobbleActivity focused on writes (scrobbling releases/mediums/tracks)
3. Move diagnostics to Maintenance

Files involved

• lib/music_library/scrobble_activity.ex
• lib/music_library/listening_stats.ex
• lib/music_library/maintenance.ex
• lib/music_library_web/live/scrobbled_tracks_live/index.ex
• lib/music_library_web/live/maintenance_live/index.ex
• Tests for all of the above