yellowjacket/.planning/quick/8-add-duplicate-tracks-dialog-to-playlist/8-SUMMARY.md

phase, plan, subsystem, tags, dependency_graph, tech_stack, key_files, decisions, metrics

phase	plan	subsystem	tags	dependency_graph	tech_stack	key_files	decisions	metrics
quick	8	playlist	playlist duplicate-detection dialog ux	requires provides affects duplicate-track-detection duplicate-tracks-dialog playlist-picker playlist-view	added patterns wa-dialog wa-switch lit-component	created modified frontend/src/components/duplicate-tracks-dialog/duplicate-tracks-dialog.ts backend/playlist/playlist.go frontend/src/components/playlist-picker/playlist-picker.ts frontend/src/components/playlist-view/playlist-view.ts frontend/wailsjs/go/models.ts frontend/wailsjs/go/playlist/Service.d.ts frontend/wailsjs/go/playlist/Service.js	Used DuplicateCheckResult wrapper struct for Wails (T, error) return signature compatibility Reused GetPlaylistTracksWithMetadata query for duplicate detection (avoids new SQL query)	duration completed tasks 12 min 2026-03-01 3/3

Quick Task 8: Add Duplicate Tracks Dialog to Playlist Summary

Backend duplicate detection using existing playlist track queries, new Lit dialog component stepping through duplicates one-by-one with Add/Skip and batch-apply toggle, wired into both playlist-picker context menu and playlist-view drag-drop flows.

What Was Built

Backend: FindDuplicateTracksInPlaylist (Task 1)

• Added DuplicateTrackInfo and DuplicateCheckResult types to backend/playlist/playlist.go
• Implemented FindDuplicateTracksInPlaylist(playlistID, filePaths) method on Service
• Uses existing GetPlaylistTracksWithMetadata query to build a map of existing file paths
• Partitions incoming file paths into duplicates (with metadata) and unique paths
• Wails TypeScript bindings regenerated with proper type mappings

Frontend: DuplicateTracksDialog Component (Task 2)

• New <duplicate-tracks-dialog> Lit component at frontend/src/components/duplicate-tracks-dialog/
• Follows existing wa-dialog patterns from track-details.ts and phantom-resolver.ts
• Shows duplicate track count header, progress indicator (Track N of M)
• Track card displays Title, Artist, Album, Duration for the current duplicate
• "Add" button includes duplicate in final add; "Skip" excludes it
• wa-switch toggle "Apply to all remaining" batch-applies the current choice
• finalize() combines unique paths + user-approved duplicates, calls AddTracksToPlaylist, dispatches playlist-action-complete

Frontend: Integration (Task 3)

• playlist-picker.ts: handleSelectPlaylist now calls FindDuplicateTracksInPlaylist before adding. If duplicates found, opens the dialog instead. Otherwise adds directly as before.
• playlist-view.ts: onPlaylistDrop drag-drop handler similarly checks for duplicates before adding. Shows dialog when duplicates found.
• Both components render <duplicate-tracks-dialog> and listen for playlist-action-complete to trigger refresh.

Commits

Task	Name	Commit	Key Files
1	Add backend FindDuplicateTracksInPlaylist	83de934	backend/playlist/playlist.go, wailsjs bindings
2	Create duplicate-tracks-dialog component	9f3ba2b	frontend/src/components/duplicate-tracks-dialog/duplicate-tracks-dialog.ts
3	Wire duplicate detection into playlist-picker and playlist-view	917a79a	playlist-picker.ts, playlist-view.ts

Deviations from Plan

None - plan executed exactly as written.

Verification

• go build ./... — backend compiles
• npx tsc --noEmit — frontend typechecks
• Wails bindings regenerated with FindDuplicateTracksInPlaylist
• DuplicateCheckResult and DuplicateTrackInfo types in generated models.ts

Self-Check: PASSED

All created files exist, all commits found, all modified files present.