From 93ade77e0adf9a1ec64a3fdd27e07341fa527e36 Mon Sep 17 00:00:00 2001 From: Nuwan Date: Wed, 14 Jan 2026 13:30:19 +0530 Subject: [PATCH] docs(02-01): complete backing track seek controls with UAT Phase 2 complete with comprehensive UAT testing and critical fixes. Summary updates: - Documented 4 UAT issues discovered during testing - 3 blocker issues resolved (UAT-001, UAT-002, UAT-004) - 1 minor issue deferred to Phase 3 (UAT-003) - 13 total commits (3 feat + 5 fix + 4 docs + 1 refactor) - Duration: 120 min (2 min execution + 118 min UAT/fixes) Key discoveries: - jamClient in jam-ui uses Proxy pattern (all methods return Promises) - jamClient returns string values (must parseInt) - jamClient cannot be stored in Redux (immutability violation) - End-of-track requires SessionStopPlay() reset before new playback State updates: - Added decisions from Phase 2 to accumulated context - Added UAT-003 to deferred issues - Updated velocity metrics (120 min total for Phase 2) - Ready for Phase 3 (Backing Track Finalization) Roadmap updates: - Phase 2 completion date: 2026-01-14 --- .planning/ROADMAP.md | 2 +- .planning/STATE.md | 33 +- .../02-01-SUMMARY.md | 321 +++++++++++++++--- 3 files changed, 302 insertions(+), 54 deletions(-) diff --git a/.planning/ROADMAP.md b/.planning/ROADMAP.md index f253525b0..69ffc939f 100644 --- a/.planning/ROADMAP.md +++ b/.planning/ROADMAP.md @@ -99,7 +99,7 @@ Phases execute in numeric order: 1 → 2 → 3 → 4 → 5 → 6 → 7 | Phase | Plans Complete | Status | Completed | |-------|----------------|--------|-----------| | 1. Backing Track Playback Monitoring | 1/1 | Complete | 2026-01-13 | -| 2. Backing Track Seek Controls | 1/1 | Complete | 2026-01-13 | +| 2. Backing Track Seek Controls | 1/1 | Complete | 2026-01-14 | | 3. Backing Track Finalization | 0/TBD | Not started | - | | 4. JamTrack Research & Design | 0/TBD | Not started | - | | 5. JamTrack Implementation | 0/TBD | Not started | - | diff --git a/.planning/STATE.md b/.planning/STATE.md index bf93595f6..4dcca3ba4 100644 --- a/.planning/STATE.md +++ b/.planning/STATE.md @@ -11,8 +11,8 @@ See: .planning/PROJECT.md (updated 2026-01-13) Phase: 2 of 7 (Backing Track Seek Controls) Plan: 1 of 1 in current phase -Status: Phase complete -Last activity: 2026-01-13 — Completed 02-01-PLAN.md +Status: Phase complete (with UAT) +Last activity: 2026-01-14 — Completed Phase 2 with UAT testing and fixes Progress: ████░░░░░░ 29% @@ -20,19 +20,19 @@ Progress: ████░░░░░░ 29% **Velocity:** - Total plans completed: 2 -- Average duration: 2.5 min -- Total execution time: 0.08 hours +- Average duration: 61.5 min +- Total execution time: 2.05 hours **By Phase:** | Phase | Plans | Total | Avg/Plan | |-------|-------|-------|----------| | 1 | 1 | 3 min | 3 min | -| 2 | 1 | 2 min | 2 min | +| 2 | 1 | 120 min | 120 min | **Recent Trend:** -- Last 5 plans: 3 min, 2 min -- Trend: Improving (faster execution) +- Last 5 plans: 3 min, 120 min +- Trend: Phase 2 included extensive UAT testing and critical bug fixes ## Accumulated Context @@ -41,11 +41,20 @@ Progress: ████░░░░░░ 29% Decisions are logged in PROJECT.md Key Decisions table. Recent decisions affecting current work: -(None yet) +**From Phase 2 (02-backing-track-seek-controls):** +- jamClient must NOT be stored in Redux state - pass as prop instead (non-serializable) +- All jamClient methods in jam-ui return Promises - always use async/await pattern +- jamClient returns string values - always parseInt() before math operations +- End-of-track position requires SessionStopPlay() reset before new playback +- Defer UAT-003 (seek while paused limitation) to Phase 3 - minor impact ### Deferred Issues -None yet. +**UAT-003: Seek while paused doesn't register** (from Phase 2) +- Severity: Minor +- Impact: Seeking during playback works perfectly, paused seeking requires workaround +- Deferred to: Phase 3 (Backing Track Finalization) +- Details: .planning/phases/02-backing-track-seek-controls/02-01-ISSUES.md ### Blockers/Concerns @@ -53,6 +62,8 @@ None yet. ## Session Continuity -Last session: 2026-01-13T18:10:40Z -Stopped at: Completed 02-01-PLAN.md (Phase 2 complete) +Last session: 2026-01-14 +Stopped at: Completed Phase 2 with UAT testing (3 blocker issues resolved, 1 minor issue deferred) Resume file: None + +**Next:** Phase 3 (Backing Track Finalization) - Plan the phase or proceed with execution diff --git a/.planning/phases/02-backing-track-seek-controls/02-01-SUMMARY.md b/.planning/phases/02-backing-track-seek-controls/02-01-SUMMARY.md index 001bbcdb7..118d84569 100644 --- a/.planning/phases/02-backing-track-seek-controls/02-01-SUMMARY.md +++ b/.planning/phases/02-backing-track-seek-controls/02-01-SUMMARY.md @@ -2,7 +2,7 @@ phase: 02-backing-track-seek-controls plan: 01 subsystem: ui -tags: [react, hooks, jamClient, native-integration, seek-controls] +tags: [react, hooks, jamClient, native-integration, seek-controls, uat, async-await] # Dependency graph requires: @@ -12,97 +12,334 @@ provides: - Functional seek slider with drag-to-position capability - currentPositionMs and durationMs state for slider calculations - handleSeek implementation using jamClient.SessionTrackSeekMs() + - Edge case handling for end-of-track seeking + - jamClient async/await pattern established affects: [03-backing-track-finalization, media-player-ui] # Tech tracking tech-stack: added: [] - patterns: [optimistic UI updates, millisecond state for slider precision, SessionTrackSeekMs() integration] + patterns: [optimistic UI updates, millisecond state for slider precision, SessionTrackSeekMs() integration, jamClientProxy async/await pattern, end-of-track reset] key-files: - created: [] - modified: [jam-ui/src/components/client/JKSessionBackingTrackPlayer.js] + created: [.planning/phases/02-backing-track-seek-controls/02-01-ISSUES.md] + modified: [jam-ui/src/components/client/JKSessionBackingTrackPlayer.js, jam-ui/src/components/client/JKSessionScreen.js] key-decisions: - "Separate state for milliseconds (slider calculations) vs formatted strings (display)" - "Optimistic UI update before jamClient call for responsive UX" - "Polling useEffect auto-corrects position drift within 500ms" - - "Works identically during playback and when paused (no special handling needed)" + - "jamClient must NOT be stored in Redux state - pass as prop instead" + - "All jamClient methods in jam-ui return Promises - always use async/await" + - "jamClient returns string values - always parseInt() before math operations" + - "End-of-track position requires SessionStopPlay() reset before new playback" + - "Defer UAT-003 (seek while paused) to Phase 3 - minor impact, likely jamClient limitation" patterns-established: - "Slider state pattern: numeric state (currentPositionMs/durationMs) for calculations, formatted state (currentTime/duration) for display" - "Optimistic update pattern: Update local state immediately, let polling correct any drift" - "Native client seek integration: jamClient.SessionTrackSeekMs(positionMs) with error handling" + - "jamClient integration pattern in jam-ui: Always async/await, always parseInt string returns, never store in Redux" + - "End-of-track detection: position >= duration - 50ms, reset via SessionStopPlay() before SessionStartPlay()" -issues-created: [] +issues-created: [.planning/phases/02-backing-track-seek-controls/02-01-ISSUES.md (UAT-003)] # Metrics -duration: 2min -completed: 2026-01-13 +duration: 120min +completed: 2026-01-14 +uat-issues-found: 4 +uat-issues-resolved: 3 +uat-issues-deferred: 1 --- # Phase 2 Plan 1: Backing Track Seek Controls Summary -**Functional seek slider with drag-to-position capability using jamClient.SessionTrackSeekMs() and optimistic UI updates** +**Completed:** 2026-01-14 +**Duration:** ~120 min (including UAT and critical fixes) +**Plan:** 02-backing-track-seek-controls/02-01-PLAN.md + +## Objective + +Make the backing track seek bar functional by wiring it to real playback position and implementing drag-to-position capability using jamClient.SessionTrackSeekMs(). ## Performance -- **Duration:** 2 min +- **Duration:** ~120 min (2 min plan execution + 118 min UAT and fixes) - **Started:** 2026-01-13T18:08:39Z -- **Completed:** 2026-01-13T18:10:40Z -- **Tasks:** 3 -- **Files modified:** 1 +- **Completed:** 2026-01-14 +- **Tasks:** 3 planned + 4 UAT fixes +- **Files modified:** 2 +- **Commits:** 13 total (3 feat + 5 fix + 4 docs + 1 refactor) ## Accomplishments -- Added currentPositionMs and durationMs state for numeric slider calculations -- Wired slider to reflect live playback position via polling updates from Phase 1 -- Implemented handleSeek with jamClient.SessionTrackSeekMs() integration and optimistic updates -- Slider now functional during both playback and pause states + +### Core Functionality (Tasks 1-3) ✅ +- ✅ Added `currentPositionMs` and `durationMs` state for numeric slider calculations +- ✅ Wired slider to reflect live playback position via polling updates +- ✅ Implemented `handleSeek()` with jamClient.SessionTrackSeekMs() integration +- ✅ Slider functional during playback + +### UAT Discoveries and Fixes ✅ +During user acceptance testing, discovered and resolved **4 critical issues** that were blocking core functionality: + +**UAT-001: Redux Immutability Violation** *(Blocker - RESOLVED)* +- **Issue:** Player wouldn't open - jamClient object stored in Redux state caused mutation detection error +- **Root cause:** Storing non-serializable jamClient object in Redux state at `activeSession.backingTrackData.jamClient.app` +- **Fix:** Removed jamClient from Redux state, pass as direct prop from JKSessionScreen component scope +- **Impact:** Established pattern for all future jamClient usage - never store in Redux +- **Commit:** `94d43fe9c` + +**UAT-002: NaN Values and No Audio** *(Blocker - RESOLVED)* +- **Issue:** Time displays showed "NaN:NaN", slider jumped to middle, no audio playback +- **Root causes:** + 1. jamClient methods return Promises but code called them synchronously without `await` + 2. jamClient returns string values ('0', '228818') not numbers + 3. SessionStartPlay() missing required playback mode parameter (1) +- **Critical discovery:** jam-ui uses jamClientProxy with Proxy pattern where ALL methods return Promises (different from legacy web's synchronous bridge.invokeMethod()) +- **Fix:** Added async/await for all jamClient calls, parseInt() for string conversion, SessionStartPlay(1) parameter +- **Impact:** Established async/await pattern for all jamClient usage in jam-ui +- **Commits:** `0561c8988`, `2a435806e`, `2c5ba2f4b` + +**UAT-003: Seek While Paused Limitation** *(Minor - OPEN/DEFERRED)* +- **Issue:** Seeking while paused doesn't take effect until next play cycle +- **Impact:** Seek during playback works perfectly, seeking while paused requires workaround +- **Severity:** Minor - most users seek while playing, workaround exists (start play first) +- **Analysis:** Appears to be jamClient limitation where SessionTrackSeekMs() only registers during active playback +- **Status:** Documented in ISSUES.md, deferred to Phase 3 for investigation + +**UAT-004: Seek to End While Paused Breaks Player** *(Blocker - RESOLVED)* +- **Issue:** Seeking to end while paused, then clicking play caused player to break (no audio, slider resets, play button stops working) +- **Root cause:** jamClient enters end-of-track state when position >= duration, calling SessionStartPlay() without reset causes undefined behavior +- **Fix:** Detect end position (within 50ms of duration), call SessionStopPlay() to reset jamClient state, seek to 0, then start playback normally +- **Impact:** Better UX - player resets to beginning when trying to play from end position +- **Commits:** `ba93f1a27`, `fc2b26355`, `0db622ad6` + +**Enhancement: Logging Improvements** +- **Added:** `[BTP]` prefix to all console logs for easier filtering during debugging +- **Benefit:** Significantly improved debugging efficiency during UAT +- **Commit:** `3fb235240` ## Task Commits -Each task was committed atomically: - +### Plan Execution 1. **Task 1: Add state for position in milliseconds** - `209cefcf2` (feat) 2. **Task 2: Wire slider to reflect current position** - `491c0a68e` (feat) 3. **Task 3: Implement functional handleSeek** - `18afc9370` (feat) +### UAT Fixes +4. **UAT-001: Redux immutability fix** - `94d43fe9c` (fix) +5. **UAT-002: NaN defensive checks** - `0561c8988` (fix) +6. **UAT-002: Async/await implementation** - `2a435806e` (fix) +7. **UAT-002: String parsing and parameters** - `2c5ba2f4b` (fix) +8. **UAT-004: End-of-track edge case** - `ba93f1a27` (fix) + +### Documentation & Refinement +9. **UAT-004 documentation** - `0db622ad6` (docs) +10. **UAT-004 resolution confirmation** - `fc2b26355` (docs) +11. **Logging prefix enhancement** - `3fb235240` (refactor) +12. **Initial plan completion** - `6e69c8974` (docs) +13. **Plan creation** - `2e312849a` (docs) + ## Files Created/Modified -- `jam-ui/src/components/client/JKSessionBackingTrackPlayer.js` - Added currentPositionMs/durationMs state, wired slider inputs, implemented handleSeek function + +**Created:** +- `.planning/phases/02-backing-track-seek-controls/02-01-ISSUES.md` - UAT issue tracking document + +**Modified:** +- `jam-ui/src/components/client/JKSessionBackingTrackPlayer.js` - Added position state, wired slider, implemented seek, fixed async issues, added edge case handling, added diagnostic logging +- `jam-ui/src/components/client/JKSessionScreen.js` - Removed jamClient from Redux dispatch, pass as direct prop instead + +## Key Technical Discoveries + +### 1. jamClient Architecture in jam-ui +**Critical finding:** jam-ui uses jamClientProxy with Proxy pattern where ALL methods return Promises + +- Different from legacy web's synchronous `bridge.invokeMethod()` calls +- Implementation in `jamClientProxy.js`: `sendMessage()` returns `deferred.promise` +- `setupAsyncProxy()` wraps all method calls to return `sendWhenReady()` Promise +- **Implication:** Always use async/await when calling jamClient methods in jam-ui components + +### 2. jamClient Return Values +- All methods return string values ('0', '228818') not numbers +- Must use `parseInt(value, 10) || 0` before math operations or comparisons +- Example: `SessionCurrrentPlayPosMs()` returns `'1502'` (string) not `1502` (number) + +### 3. Redux State Serialization +- Cannot store non-serializable objects (like jamClient) in Redux state +- Redux Toolkit's immutability checks catch this in development mode +- Error message: "A state mutation was detected between dispatches, in the path 'activeSession.backingTrackData.jamClient.app'" +- **Solution:** Pass jamClient as prop through component tree, never store in Redux + +### 4. End-of-Track State Handling +- jamClient enters special state when `position >= duration` +- Must call `SessionStopPlay()` to reset before starting new playback +- Detection threshold: within 50ms of duration to avoid false positives during normal seeking +- Without reset: Player enters broken state (no audio, UI becomes non-functional) + +### 5. SessionStartPlay Parameter +- Requires playback mode parameter: `SessionStartPlay(1)` for normal playback +- Without parameter: Audio doesn't play (silent failure) +- Legacy web code consistently uses `SessionStartPlay(1)` or `SessionStartPlay(data.playbackMode)` ## Decisions Made -- **Separate state for calculations vs display:** Used currentPositionMs/durationMs (numbers) for slider min/max/value calculations, kept currentTime/duration (strings) for M:SS display format. This separation maintains clean concerns. -- **Optimistic UI updates:** Update local state immediately on slider drag before calling jamClient for responsive feel. Phase 1 polling useEffect auto-corrects actual position within 500ms. -- **No special pause handling:** Seeking works identically during playback and pause. No need for conditional logic or polling suspension. -- **Error handling strategy:** Log seek errors to console but don't crash. Polling will recover position on next cycle. + +1. **Separate state for milliseconds vs formatted strings** + - Slider uses numeric values (`currentPositionMs`, `durationMs`) + - Display uses M:SS format (`currentTime`, `duration`) + - Rationale: Clean separation of concerns, easier calculations + +2. **Optimistic UI updates** + - Update local state immediately before jamClient call + - Provides responsive UX feel + - 500ms polling auto-corrects any drift + +3. **End-of-track reset to beginning** + - When playing from end position, reset to 0:00 and start playback + - Better UX than broken state or silent failure + - Matches common media player behavior + +4. **jamClient as prop, not Redux** + - Pass directly as prop instead of storing in Redux + - Follows React best practices for non-serializable data + - Prevents Redux immutability violations + +5. **Always async/await for jamClient in jam-ui** + - Established pattern for all jam-ui components + - Different from legacy web synchronous pattern + - Prevents Promise object issues + +6. **Always parseInt jamClient returns** + - Established pattern for all numeric operations + - Prevents NaN issues in calculations and comparisons + - Defensive `|| 0` fallback for safety + +7. **Defer UAT-003 to Phase 3** + - Accept seeking while paused limitation + - Minor impact (seek during playback works perfectly) + - Most users seek while playing + - Likely requires jamClient changes (deeper investigation needed) ## Deviations from Plan -None - plan executed exactly as written. +**Plan:** "Works identically during playback and when paused (no special handling needed)" + +**Reality:** Seeking while paused has limitations (UAT-003). Added special handling for end-of-track edge case (UAT-004). + +**Reason:** Plan didn't account for jamClient async architecture and state management behavior. ## Issues Encountered -None - straightforward implementation building on Phase 1 foundation. +1. **Redux immutability violation** - jamClient in Redux state +2. **Async/await missing** - jamClient Proxy pattern not understood +3. **String vs number types** - jamClient return values needed parsing +4. **Missing API parameter** - SessionStartPlay(1) required +5. **End-of-track state** - jamClient requires reset before replay + +**All resolved except UAT-003 (deferred)** + +## Edge Cases Tested + +✅ **Pass:** Seek while playing - audio jumps to position +✅ **Pass:** Seek to start - restarts from 0:00 +✅ **Pass:** Seek to end - resets to beginning and plays +✅ **Pass:** Play → Stop → Seek → Play - works correctly +✅ **Pass:** Seek past end boundary - slider stays at max +⚠️ **Limitation:** Rapid seeks while paused - doesn't register (UAT-003) +⚠️ **Limitation:** Seek during initial load - doesn't register (UAT-003) + +## Verification Results + +**Core Functionality:** +- ✅ Slider starts at far left (0:00) +- ✅ Slider moves smoothly during playback +- ✅ Slider position matches time display +- ✅ Drag slider during playback - audio jumps to position +- ✅ Time display updates to match slider +- ✅ Seek to end resets to beginning (edge case handling) +- ✅ Seek to start works correctly +- ✅ Console clean (no errors during normal operation) + +**Edge Cases:** +- ✅ Seek to end while paused - works (resets to beginning) +- ⚠️ Seek while paused - limitation documented (UAT-003) +- ✅ Multiple seeks while playing - works +- ✅ Play after stop - works +- ✅ Seek past end boundary - handled gracefully + +## Known Limitations + +**UAT-003: Seeking while paused doesn't register with jamClient** +- **Severity:** Minor +- **Workaround:** Start playback, then seek +- **Impact:** Seek during playback works perfectly, most users seek while playing +- **Status:** Documented, deferred to Phase 3 +- **Likely cause:** jamClient limitation (SessionTrackSeekMs() only active during playback) ## Next Phase Readiness -Phase 3 (Backing Track Finalization) can now proceed. The player has complete core functionality (play/pause/stop, time display, seek). Phase 3 will add: -- Comprehensive error handling (jamClient failures, file not found, invalid formats) -- Edge cases (seek beyond duration, rapid seeks, seek during stop transition) -- Performance optimization (reduce polling frequency when not visible, cleanup on unmount) -- UI polish (loading states, disabled states during transitions) +✅ **Phase 3 (Backing Track Finalization) ready to proceed** -All verification criteria met: -- Slider starts at far left (0:00) when track loads -- Slider moves smoothly during playback -- Slider position matches time display percentage -- Dragging slider seeks to position (audio changes) -- Time display updates to match slider position -- Seeking works when paused -- Seeking to end/beginning works correctly -- No console errors -- Both modal and popup versions functional +Phase 2 delivered fully functional seek controls with robust edge case handling. The player now has complete core functionality: +- ✅ Play/Pause/Stop controls +- ✅ Real-time position monitoring (500ms polling) +- ✅ Time display (current/duration in M:SS format) +- ✅ Functional seek slider with drag-to-position +- ✅ Edge case handling (end-of-track reset) +- ✅ jamClient async/await patterns established +- ✅ Redux state rules enforced + +**Deferred to Phase 3:** +- Investigate and fix UAT-003 (seek while paused) or document as known limitation +- Comprehensive error handling (jamClient failures, file errors, network issues) +- Performance optimization (polling frequency tuning, cleanup on unmount) +- UI polish (loading states, smooth transitions, disabled states) +- Loop functionality testing +- Volume control testing + +## Patterns Established for Future Work + +### jamClient Integration Pattern (jam-ui) +```javascript +// ✅ CORRECT - jam-ui pattern +const handleAction = async () => { + const value = await jamClient.SomeMethod(); + const numericValue = parseInt(value, 10) || 0; + // ... use numericValue +}; + +// ❌ WRONG - Don't use synchronous calls +const value = jamClient.SomeMethod(); // Returns Promise, not value! + +// ❌ WRONG - Don't store in Redux +dispatch(setState({ jamClient: jamClient })); // Immutability violation! +``` + +### End-of-Track Detection Pattern +```javascript +// Detect end position (within 50ms threshold) +if (currentPositionMs >= durationMs - 50 && durationMs > 0) { + await jamClient.SessionStopPlay(); // Reset state + await jamClient.SessionTrackSeekMs(0); // Seek to start + // Now safe to start playback + await jamClient.SessionStartPlay(1); +} +``` + +## Lessons Learned + +1. **UAT is critical** - Discovered 4 major issues that unit tests wouldn't catch +2. **jamClient architecture differs from legacy** - Always use async/await in jam-ui components +3. **Redux immutability rules are strict** - Never store non-serializable objects in Redux state +4. **Edge cases matter** - End-of-track position requires special handling to prevent broken states +5. **Logging prefixes save time** - `[BTP]` prefix made debugging significantly faster +6. **Type safety matters** - jamClient string returns caused NaN issues until parseInt() added +7. **Plan assumptions may be wrong** - "Works identically when paused" assumption proven false by UAT +8. **API parameters matter** - SessionStartPlay(1) required, silent failure without it --- + *Phase: 02-backing-track-seek-controls* -*Completed: 2026-01-13* +*Plan: 01* +*Duration: ~120 min* +*Status: Complete* +*UAT Issues: 4 found, 3 resolved, 1 deferred*