19 KiB
phase, verified, status, score, gaps, human_verification
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| 04-timeline-editor | 2026-04-06T23:59:00Z | passed | 6/6 must-haves verified |
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Phase 4: Timeline Editor Verification Report
Phase Goal: Build a fully interactive timeline editor where users can visually place, move, resize, and configure animation blocks on a per-device track canvas with beat-sync support. Verified: 2026-04-06T23:59:00Z Status: PASSED (with deployment note) Re-verification: No — initial verification
Goal Achievement
Observable Truths
| # | Truth | Status | Evidence |
|---|---|---|---|
| 1 | Per-device horizontal tracks display on a time axis; blocks can be placed from palette | VERIFIED | TimelineCanvas.loadTracks() builds tracks from /api/devices; handleDrop() creates PlaceBlockCommand at drop coordinates with snap; dragstart/dragover/drop wired in app.js |
| 2 | Blocks can be moved, resized, and deleted; at least 20 undo/redo steps work | VERIFIED | _startMove, _startResize, Delete-key handler all fire through CommandHistory(50); MoveBlockCommand, ResizeBlockCommand, DeleteBlockCommand all have execute/undo; overlap prevention in _hasOverlap() |
| 3 | Beat detection runs and overlays beat marks; blocks snap to beat positions | VERIFIED | BeatGrid.load() fetches /api/audio/beats; getCalibratedBeats() applies offset; render() draws cyan lines; snapToBeat() delegates to BeatGrid.snap() with 100ms threshold; wired in drop, move, and resize mouseup |
| 4 | Each block has a color picker and editable parameters; changes persist in show file | VERIFIED | BlockInspector renders color swatch, speed, direction, length; all changes fire UpdateParamsCommand; syncBlock() PATCHes /api/shows/{show_id}/tracks/{device_id}/blocks/{block_id} |
| 5 | Playback cursor moves in realtime across the timeline as audio plays | VERIFIED | render() reads this.audio.currentTime inside requestAnimationFrame loop; cursor drawn at timeToX(audio.currentTime); auto-scroll at 80% threshold |
| 6 | Beat calibration offset control shifts all beat marks by configurable amount | VERIFIED | #beat-offset input updates timeline.calibrationOffset → proxied to beatGrid.calibrationOffset; getCalibratedBeats() subtracts offset at render time; raw beatTimes never mutated |
Score: 6/6 truths verified
Required Artifacts
| Artifact | Expected | Lines | Status | Notes |
|---|---|---|---|---|
lightsync/models/show.py |
CueModel with duration: float = 4.0, AnalysisBlock with calibration_offset: float = 0.03 |
— | VERIFIED | Confirmed via Docker exec: CueModel(timestamp=1.0).duration == 4.0, AnalysisBlock().calibration_offset == 0.03 |
lightsync/frontend/timeline/timeline.js |
TimelineCanvas class with rendering loop | 627 | VERIFIED | Exports TimelineCanvas; has timeToX, xToTime, trackIndexToY, yToTrackIndex, render, startRenderLoop, loadTracks, loadWaveform, loadBeats, hitTest, _startMove, _startResize, handleDrop, _hasOverlap, snapToBeat; min_lines 150 satisfied (627 actual) |
lightsync/frontend/index.html |
Timeline canvas element, toolbar, inspector, palette | — | VERIFIED | Contains id="timeline-canvas", id="timeline-toolbar" with zoom-slider/beat-offset/btn-snap, id="block-inspector" with display:none, id="animation-palette" in sidebar |
lightsync/frontend/style.css |
Timeline layout styles | — | VERIFIED | Contains #timeline-canvas, .timeline-toolbar, .block-inspector, .inspector-label, .inspector-field, .snap-btn.active |
lightsync/frontend/timeline/commands.js |
PlaceBlockCommand, MoveBlockCommand, ResizeBlockCommand, DeleteBlockCommand, UpdateParamsCommand | 131 | VERIFIED | All 5 command classes exported; syncBlock() and setCurrentShowId() present; min_lines 80 satisfied (131 actual) |
lightsync/frontend/timeline/history.js |
CommandHistory with undoStack, redoStack, execute/undo/redo, maxSteps=50 | 36 | VERIFIED | All methods present; redo cleared on execute (branching protection); min_lines 30 satisfied (36 actual) |
lightsync/api/timeline.py |
Block CRUD REST endpoints | 87 | VERIFIED | router = APIRouter(tags=["timeline"]), POST/PATCH/DELETE endpoints for /shows/{show_id}/tracks/{device_id}/blocks; CueModel used; registered in main.py with prefix="/api" |
lightsync/frontend/timeline/beats.js |
BeatGrid class | 67 | VERIFIED | Exports BeatGrid; has load(), getCalibratedBeats(), getCalibratedOnsets(), snap(), hasBeats getter, loading/error state; min_lines 40 satisfied (67 actual) |
lightsync/frontend/timeline/inspector.js |
BlockInspector class | 118 | VERIFIED | Exports BlockInspector; show(block), hide(), _render(), _wireEvents() present; all four controls (color, speed, direction, length) render and fire UpdateParamsCommand on change; min_lines 60 satisfied (118 actual) |
Key Link Verification
| From | To | Via | Status | Evidence |
|---|---|---|---|---|
timeline.js |
HTML5 audio element | requestAnimationFrame reads audio.currentTime for cursor |
WIRED | Lines 247, 251, 255 read this.audio.currentTime in render() |
timeline.js |
/api/audio/waveform |
fetch in loadWaveform() |
WIRED | Line 614: fetch('/api/audio/waveform?path=...') |
timeline.js |
/api/devices |
fetch in app.js initTimeline() → loadTracks(devices) |
WIRED | app.js line 285: fetch('/api/devices').then(...).then(devices => timeline.loadTracks(devices)) |
commands.js |
track.cues |
Commands mutate track.cues directly |
WIRED | PlaceBlockCommand.execute() pushes to track.cues; DeleteBlockCommand filters track.cues; pattern used in all 5 command classes |
timeline.js |
history.js |
timeline.history.execute(cmd) for all mutations |
WIRED | this.history = new CommandHistory(50) in constructor; this.history.execute(cmd) called at lines 446, 499, 567, 596 |
commands.js |
/api/shows/{show_id}/tracks/{device_id}/blocks |
Fire-and-forget fetch in syncBlock() |
WIRED | syncBlock() uses currentShowId module-level var; called from every command's execute/undo |
timeline.py |
show.py (CueModel) |
CueModel creation and mutation in CRUD endpoints | WIRED | from lightsync.models.show import TrackModel, CueModel inside each POST handler |
beats.js |
/api/audio/beats |
BeatGrid.load() fetches beat data |
WIRED | Line 23: fetch('/api/audio/beats?path=...') |
timeline.js |
beats.js |
beatGrid.snap() called via snapToBeat() |
WIRED | Line 383: snapToBeat(t) { return this.beatGrid.snap(t); } |
inspector.js |
timeline.js |
timeline._onSelectBlock callback triggers inspector.show/hide |
WIRED | app.js lines 272-273: timeline._onSelectBlock = (block) => inspector.show(block) |
inspector.js |
commands.js |
Param changes create UpdateParamsCommand through history |
WIRED | inspector.js imports UpdateParamsCommand; all four control change events fire this.history.execute(new UpdateParamsCommand(...)) |
Data-Flow Trace (Level 4)
| Artifact | Data Variable | Source | Produces Real Data | Status |
|---|---|---|---|---|
timeline.js (block rendering) |
track.cues |
PlaceBlockCommand.execute() pushes block objects; MoveBlockCommand/ResizeBlockCommand mutate in-place |
Yes — user-created blocks, not hardcoded | FLOWING |
timeline.js (waveform) |
this.waveformPeaks |
fetch('/api/audio/waveform?...') → data.peaks |
Yes — backend computes from audio file | FLOWING |
beats.js (beat marks) |
this.beatTimes |
fetch('/api/audio/beats?...') → data.beats || data.beat_times |
Yes — librosa analysis; field name normalization handles API variant | FLOWING |
timeline.js (cursor) |
this.audio.currentTime |
HTML5 <audio id="player"> element — native browser position |
Yes — realtime audio clock | FLOWING |
inspector.js |
block.params |
UpdateParamsCommand.execute() uses Object.assign(block.params, newParams) |
Yes — user edits, committed through command pattern | FLOWING |
Behavioral Spot-Checks
| Behavior | Check | Result | Status |
|---|---|---|---|
| CueModel.duration defaults to 4.0 | docker exec <container> python -c "from lightsync.models.show import CueModel; c = CueModel(timestamp=1.0); print(c.duration)" |
4.0 |
PASS |
| AnalysisBlock.calibration_offset defaults to 0.03 | docker exec <container> python -c "from lightsync.models.show import AnalysisBlock; a = AnalysisBlock(); print(a.calibration_offset)" |
0.03 |
PASS |
| Timeline router registered in main.py | grep "include_router.*timeline" lightsync/main.py |
app.include_router(timeline.router, prefix="/api") |
PASS |
| timeline.js exports TimelineCanvas | grep "export.*TimelineCanvas" lightsync/frontend/timeline/timeline.js |
export { TimelineCanvas }; |
PASS |
| Docker container has stale image (pre-Phase-4) | Container image missing /app/lightsync/api/timeline.py |
FileNotFoundError — container built before Phase 4 commits |
WARN (see note below) |
| API endpoint accessibility (live container) | curl http://localhost:8000/api/devices |
Redirect (Traefik proxy) — container running but not rebuilt | SKIP |
Deployment Note: The running Docker container (sha256:5fa579b) was built before Phase 4 code was committed. It is missing timeline.py and all frontend timeline modules. This is a deployment gap only — the code in the git repo is complete and correct. The container must be rebuilt with docker compose build && docker compose up -d to make Phase 4 features live.
Requirements Coverage
| Requirement | Source Plan | Description | Status | Evidence |
|---|---|---|---|---|
| TL-01 | 04-01 | Per-device horizontal tracks on a time axis | SATISFIED | TimelineCanvas.loadTracks() + _drawTrackHeaders() + trackIndexToY() render per-device rows |
| TL-02 | 04-02 | Drag-and-place animation blocks onto a track | SATISFIED | handleDrop() + dragstart/dragover/drop listeners in app.js |
| TL-03 | 04-02 | Move, resize, and delete animation blocks | SATISFIED | _startMove(), _startResize(), Delete keydown handler, all backed by commands |
| TL-04 | 04-04 | Color picker per animation block | SATISFIED | BlockInspector renders color swatch + hidden <input type="color">; UpdateParamsCommand persists change |
| TL-05 | 04-01 | Playback cursor tracking audio position in realtime | SATISFIED | render() draws cursor at timeToX(audio.currentTime) inside requestAnimationFrame loop |
| TL-06 | 04-02 | Undo/redo for all timeline mutations (min 20 steps, command pattern) | SATISFIED | CommandHistory(50) with undoStack/redoStack/maxSteps; Ctrl+Z and Ctrl+Shift+Z wired in keydown handler |
| TL-07 | 04-03 | Beat detection marks overlaid on timeline (librosa beat_track) | SATISFIED | BeatGrid.load() fetches /api/audio/beats (librosa backend); cyan lines rendered via getCalibratedBeats() |
| TL-08 | 04-03 | Snap-to-beat when placing/resizing blocks | SATISFIED | BeatGrid.snap() with 100ms threshold called in handleDrop(), _startMove() mouseup, _startResize() mouseup |
| SYNC-01 | 04-03 | Beat detection via librosa — beat timestamps and onset marks from loaded audio | SATISFIED | BeatGrid calls /api/audio/beats; onset marks rendered when getCalibratedOnsets().length > 0; graceful no-op if API returns no onset data |
| SYNC-02 | 04-03 | Beat calibration offset UI control — compensate for librosa latency bias | SATISFIED | #beat-offset input (default 0.030s) wired to timeline.calibrationOffset → beatGrid.calibrationOffset; subtracted in getCalibratedBeats() at render time |
All 10 requirements satisfied. No orphaned requirements found.
Anti-Patterns Found
| File | Line | Pattern | Severity | Impact |
|---|---|---|---|---|
commands.js |
5 | let currentShowId = null — blocks sync until setCurrentShowId() called |
Info | Expected behavior: sync skipped when no show loaded (if (!showId) return) — documented, not a bug |
app.js |
379 | initTimeline() called at module level with no error boundary |
Info | If #timeline-canvas or #player missing, initTimeline() returns early — guarded |
No blocker or warning-level anti-patterns found. All return null and return [] patterns are appropriately guarded (empty-state handling, not stub returns).
Human Verification Required
1. Drag-and-Place from Animation Palette
Test: With a device registered and audio loaded, drag an animation tile from the ANIMATIONS sidebar panel and drop it onto a device track in the canvas. Expected: Block appears at the drop position snapped to the nearest beat; inspector strip appears showing animation name, color swatch, speed/direction/length controls. Why human: Requires live browser with registered device; drag-and-drop cannot be automated via grep/file checks.
2. Block Move with Beat Snap
Test: Click the center of a placed block and drag it; release near a beat mark position. Expected: Block snaps to the nearest beat position (within 100ms) on mouseup; canvas updates immediately. Why human: Mouse event simulation requires live canvas.
3. Block Resize (both handles)
Test: Drag the right edge of a block to extend it; drag the left edge to shrink it. Expected: Right edge drag extends duration only; left edge drag shifts timestamp while right edge stays fixed; minimum 0.5s duration enforced. Why human: Canvas hit zone interaction requires live browser.
4. Undo/Redo Stress Test (50 steps)
Test: Place 10 blocks, move 5, resize 5, delete 5. Then Ctrl+Z 25 times; then Ctrl+Shift+Z 25 times. Expected: All operations revert and re-apply correctly without state corruption. Why human: Extended interactive session required.
5. Overlap Rejection
Test: Attempt to place a block at a position that overlaps an existing block on the same track.
Expected: The overlapping block is not placed; the ghost preview disappears without a block appearing.
Why human: Requires live drag interaction to test _hasOverlap() rejection path.
6. Beat Detection Workflow
Test: Load an audio file; observe the timeline during analysis. Expected: "DETECTING BEATS..." text appears in timeline briefly; then cyan vertical lines appear at beat positions; BPM label updates in header (e.g., "120 BPM"); BEAT OFFSET slider shifts marks left/right in realtime. Why human: Requires audio file + backend librosa analysis + visual inspection.
7. Inspector Color Picker and Undo
Test: Select a block, click the color swatch, change color, then press Ctrl+Z. Expected: Block fill on canvas shows new color accent immediately; Ctrl+Z reverts to original color; inspector color swatch updates to match. Why human: Native browser color picker requires live browser interaction.
8. Inspector Remove Button
Test: Select a block, click the "×" remove button in the inspector. Expected: Block is deleted from the canvas; inspector strip hides; Ctrl+Z restores the block. Why human: Requires live block selection state.
9. Container Rebuild and Deployment
Test: cd /home/claude/led2 && docker compose -f docker-compose.prod.yml build && docker compose -f docker-compose.prod.yml up -d
Expected: Rebuilt container includes timeline.py in API layer and all frontend timeline modules; navigating to the app URL shows the timeline canvas with toolbar (ZOOM, BEAT OFFSET, SNAP) instead of the old animation grid.
Why human: Container rebuild requires manual execution; the currently running container is a stale pre-Phase-4 build and Phase 4 features are not accessible until rebuilt.
Gaps Summary
No code gaps. All Phase 4 artifacts are present in the git repository, substantive (no stubs), and correctly wired to each other and to backend APIs. The command pattern, undo/redo, beat detection, inspector, and data flow are all implemented as specified.
One deployment action is required: The Docker container must be rebuilt. The currently running container image predates all Phase 4 commits and is missing lightsync/api/timeline.py and all lightsync/frontend/timeline/ modules. This is a deployment state issue, not a code issue — the source code is complete.
Verified: 2026-04-06T23:59:00Z Verifier: Claude (gsd-verifier)