179 lines
12 KiB
Markdown
179 lines
12 KiB
Markdown
---
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phase: 05-live-show-execution
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verified: 2026-04-07T10:45:00Z
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status: passed
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score: 11/11 must-haves verified
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re_verification:
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previous_status: gaps_found
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previous_score: 9/11
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gaps_closed:
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- "Mouse play button now sends { type: 'play' } to server via audio element 'play' event listener (app.js line 135)"
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- "Mouse pause button now sends { type: 'pause' } to server via audio element 'pause' event listener (app.js line 136)"
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gaps_remaining: []
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regressions: []
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human_verification:
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- test: "Load a show, click transport bar play button with mouse, observe LED simulator/devices"
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expected: "Animation blocks fire at timestamps via UDP; LED simulator shows activity"
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why_human: "Requires running app + show loaded + UDP traffic — cannot verify without starting the server"
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- test: "Press Space to play, observe live preview panel strips"
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expected: "Device strips light up with animation name and color; inactive devices show dim state with em dash"
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why_human: "Visual DOM state — requires live WebSocket + audio playback"
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- test: "Seek to middle of show using seek bar, press Space to play"
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expected: "Only cues after seek position fire; no double-fire or missed cues"
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why_human: "Real-time timing behavior requires live playback"
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- test: "Load a show, drag a block, press Ctrl+S"
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expected: "No browser save dialog; change persists on reload"
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why_human: "Round-trip persistence requires live app + file system check"
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---
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# Phase 5: Live Show Execution — Verification Report
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**Phase Goal:** Live show execution — transport controls (play/pause/seek), keyboard shortcuts, and live preview panel with WebSocket-driven cue scheduler firing UDP commands during playback.
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**Verified:** 2026-04-07T10:45:00Z
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**Status:** passed
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**Re-verification:** Yes — after gap closure (plan 05-04, commit ac0f3d5)
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## Re-Verification Summary
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Previous score was 9/11 (2 partial truths, both from the same root cause: the transport bar play/pause button did not send WebSocket messages to the server, leaving `is_playing=False` for mouse-driven playback).
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Gap plan 05-04 added `client.send({ type: 'play', position: audio.currentTime })` and `client.send({ type: 'pause', position: audio.currentTime })` to the audio element event listeners in `wireAudio()`. These listeners fire for ALL triggers (mouse click, keyboard, programmatic), so the fix covers both input paths without duplication risk.
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Commit `ac0f3d5` (2026-04-07): 2 lines changed in `lightsync/frontend/app.js`. Confirmed present in the actual file at lines 135-136.
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---
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## Goal Achievement
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### Observable Truths
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| # | Truth | Status | Evidence |
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|---|-------|--------|----------|
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| 1 | Server fires UDP animation commands when audio position reaches a cue timestamp | VERIFIED | ws.py:133-168: cue scheduler gated on `is_playing`; app.js:135 now sends `{type:'play'}` on audio 'play' event — both mouse and keyboard set `is_playing=True` |
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| 2 | Seeking resets the cue pointer so past cues are marked fired and future cues re-arm | VERIFIED | ws.py:207-214: `fired_ids` rebuilt as set comprehension on seek (unchanged from initial verification) |
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| 3 | Loading a show via WebSocket populates per-connection cue list from show_store | VERIFIED | ws.py:232-242: load handler calls `_main.show_store.load(show_id)` and assigns to per-connection `show` variable |
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| 4 | Cues within 60ms ahead of tick position fire immediately (never late) | VERIFIED | ws.py:134: `LOOKAHEAD = 0.060`; ws.py:155: fires cues where `timestamp <= position + LOOKAHEAD` |
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| 5 | Pausing does not add cues to fired_ids; cues only fire during active playback | VERIFIED | Server pause handler sets `is_playing=False` without touching `fired_ids`; app.js:136 now sends `{type:'pause'}` from audio 'pause' listener — both mouse and keyboard trigger server pause |
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| 6 | Live preview panel shows active animation color and type per device, updated in sync with playback | VERIFIED | app.js:77-92: `updatePreviewStrip` updates strip DOM on `preview_update` WS messages; ws.py broadcasts on every tick |
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| 7 | Devices with no active cue show a dim inactive indicator | VERIFIED | ws.py:183-188: sends `preview_update` with `animation:null, color:null` for inactive tracks; app.js:87-91 removes active class, resets to em dash |
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| 8 | A show can be selected from a dropdown and loaded into the timeline + server | VERIFIED | app.js:496-567: `refreshShows()` populates `#show-select`; btn-load-show handler fetches full show and sends `{type:'load', show_id}` |
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| 9 | Space bar toggles play/pause without triggering button clicks or scrolling | VERIFIED | app.js:188-197: Space handler checks tag !== 'button', calls `e.preventDefault()`, toggles audio, sends WS message |
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| 10 | Arrow keys seek audio forward/backward by 5 seconds and send seek message to server | VERIFIED | app.js:198-223: ArrowLeft/Right set `audio.currentTime ±5`, send `{type:'seek'}`, clear preview strips |
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| 11 | Ctrl+Z undoes, Ctrl+Shift+Z/Ctrl+Y redoes, Ctrl+S saves without browser dialog | VERIFIED | app.js:224-244: all three bindings with `e.preventDefault()`, `timeline?.history.undo()/redo()`, Ctrl+S does GET+POST round-trip |
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**Score: 11/11 truths verified**
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---
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### Required Artifacts
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| Artifact | Expected | Status | Details |
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|----------|----------|--------|---------|
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| `lightsync/api/ws.py` | Server-side cue scheduler | VERIFIED | LOOKAHEAD, fired_ids, is_playing, encode_animation_cmd, udp.send, preview_update broadcast, seek rebuild, show loading — all present |
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| `lightsync/frontend/index.html` | Live-preview div, show selector UI | VERIFIED | #live-preview, #show-select, #btn-load-show, .keyboard-hint all present |
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| `lightsync/frontend/style.css` | Terminal-aesthetic preview panel styles | VERIFIED | .live-preview, .device-strip, .strip-label, .strip-color, .strip-anim, .keyboard-hint all present |
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| `lightsync/frontend/app.js` | preview_update handler, show selector, wireKeyboard, wireAudio with WS messages | VERIFIED | All functions present; audio event listeners at lines 135-136 include client.send() calls |
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---
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### Key Link Verification
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| From | To | Via | Status | Details |
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|------|----|-----|--------|---------|
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| app.js wireAudio() audio 'play' listener | ws.py is_playing | client.send({ type: 'play' }) | WIRED | Line 135: fires for mouse click, keyboard, and programmatic play |
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| app.js wireAudio() audio 'pause' listener | ws.py is_playing | client.send({ type: 'pause' }) | WIRED | Line 136: fires for mouse click, keyboard, and programmatic pause |
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| wireKeyboard() Space handler | ws.py is_playing | client.send({ type: 'play'/'pause' }) | WIRED | Lines 193, 196: keyboard shortcut also sends — server handlers idempotent |
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| ws.py cue scheduler | encode_animation_cmd | import + call in tick branch | WIRED | Line 25 import; line 167 call |
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| ws.py cue scheduler | udp_sender.send | websocket.app.state.udp_sender.send() | WIRED | Line 135: udp ref; line 168: udp.send(payload, device.ip, device.port) |
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| ws.py load handler | show_store | import lightsync.main, show_store.load() | WIRED | Lines 234-235: import + async load |
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| app.js | ws.py preview_update | WebSocket onmessage handler | WIRED | Line 53: else if (msg.type === 'preview_update') updatePreviewStrip(...) |
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| app.js | /api/shows | fetch to list and load shows | WIRED | Lines 500, 524: two fetch calls |
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| app.js | commands.js setCurrentShowId | import + call on show load | WIRED | Line 6 import; line 542 call |
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---
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### Data-Flow Trace (Level 4)
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| Artifact | Data Variable | Source | Produces Real Data | Status |
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|----------|---------------|--------|--------------------|--------|
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| app.js updatePreviewStrip | animation, color | preview_update WS from ws.py tick | Yes — driven by actual cue data from show_store | FLOWING |
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| app.js refreshShows | shows array | GET /api/shows | Real show data from show_store JSON files | FLOWING |
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| ws.py cue scheduler | show.tracks, cue.timestamp | show_store.load(show_id) from JSON persistence | Real data from saved show files | FLOWING |
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| app.js buildPreviewStrips | devices | GET /api/devices | Real device registry | FLOWING |
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---
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### Behavioral Spot-Checks
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| Behavior | Command | Result | Status |
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|----------|---------|--------|--------|
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| audio 'play' listener sends WS message | grep line 135 app.js | `client.send({ type: 'play', position: audio.currentTime })` present | PASS |
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| audio 'pause' listener sends WS message | grep line 136 app.js | `client.send({ type: 'pause', position: audio.currentTime })` present | PASS |
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| 2 play sends total (wireAudio + wireKeyboard) | grep -c client.send.*'play' app.js | 2 | PASS |
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| 2 pause sends total (wireAudio + wireKeyboard) | grep -c client.send.*'pause' app.js | 2 | PASS |
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| wireKeyboard shortcuts intact | grep ArrowLeft/ArrowRight/KeyZ/KeyS | All present at expected lines | PASS |
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| wireKeyboard() called at module level | grep wireKeyboard() | Called at line 351 | PASS |
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| Commit ac0f3d5 in git history | git show ac0f3d5 --stat | 1 file changed, 2 insertions, 2 deletions in app.js | PASS |
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| LOOKAHEAD constant in ws.py | grep LOOKAHEAD ws.py | LOOKAHEAD = 0.060 at line 134 | PASS |
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| is_playing set True on play, False on pause | grep is_playing ws.py | Lines 197, 201, 239 confirmed | PASS |
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---
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### Requirements Coverage
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| Requirement | Source Plan | Description | Status | Evidence |
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|-------------|------------|-------------|--------|----------|
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| SHW-03 | 05-01, 05-02, 05-04 | Live show execution — follow playback position, dispatch animation commands to devices via UDP at correct timestamps | VERIFIED | Cue scheduler armed for both mouse (wireAudio listeners) and keyboard (wireKeyboard); LOOKAHEAD=60ms; fired_ids prevent double-fire; seek rebuilds state |
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| UI-03 | 05-03 | All primary operations accessible without mouse (keyboard shortcuts for play/pause/seek/undo) | VERIFIED | wireKeyboard() wires all 7 shortcuts with correct guards and preventDefault |
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| UI-04 | 05-02 | Live preview panel — LED strip visualization in browser, synced to playback | VERIFIED | DOM strips, CSS styles, preview_update handler, and preview broadcast all wired |
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No orphaned requirements. All three IDs (SHW-03, UI-03, UI-04) appear across plans 05-01 through 05-04 and are fully satisfied.
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---
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### Anti-Patterns Found
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None. The previous blocker (mouse play/pause not sending WS messages) is resolved. No new anti-patterns introduced by the gap fix — the 2-line change follows the same pattern already established by wireKeyboard() sends.
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---
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### Human Verification Required
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### 1. Mouse-Based Playback
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**Test:** Load a show using the show selector, click the transport bar play button (not Space)
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**Expected:** Animation blocks trigger UDP commands; LED simulator/devices respond at correct timestamps
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**Why human:** Requires running server + loaded show + UDP traffic observation
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### 2. Live Preview Strip Updates
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**Test:** Load a show with at least one device and animation block, press Space to play
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**Expected:** Device strips light up with animation name and color; strips dim between blocks
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**Why human:** Visual DOM state requires live WebSocket + audio playback
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### 3. Seek + Reschedule
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**Test:** Play a show to the middle, drag seek bar to earlier position, continue playing
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**Expected:** Past cues not re-fired; cues after seek position fire correctly
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**Why human:** Real-time timing behavior requires live playback
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### 4. Ctrl+S Save Round-Trip
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**Test:** Load a show, drag a block, press Ctrl+S
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**Expected:** No browser save dialog; change persists on show reload
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**Why human:** Persistence verification requires live app + file system check
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---
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## Gaps Summary
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No gaps remain. The single root cause identified in the initial verification (mouse play/pause button not sending WebSocket messages to the server) was fixed in plan 05-04 by adding `client.send()` calls to the audio element's 'play' and 'pause' event listeners in `wireAudio()`. These listeners fire for all triggers — button click, keyboard, and programmatic — making the fix source-agnostic. Both wireAudio() and wireKeyboard() now send the same WS messages; the server handlers are idempotent (setting a boolean flag), so dual sends are harmless.
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All 11 observable truths are verified. Phase 05 goal is achieved.
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---
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_Verified: 2026-04-07T10:45:00Z_
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_Verifier: Claude (gsd-verifier)_
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_Re-verification: Yes (gaps closed by plan 05-04, commit ac0f3d5)_
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