UAT-004: When seeking to end while paused, then clicking play, the
player would break (slider jumps to 0, no audio, play button stops working).
Root cause: jamClient enters end-of-track state when position >= duration.
Calling SessionStartPlay() without resetting causes undefined behavior.
Solution:
- Detect when position is at/near end (within 100ms)
- Call SessionStopPlay() to reset jamClient state
- Seek to position 0
- Then start playback normally
Also added diagnostic logging to handlePlay, handleSeek, and polling
to help debug playback state transitions.
Fixes UAT-002 (continued): Slider not moving, time not updating
Two issues discovered:
1. jamClient returns string values ('0', '228818') not numbers
2. SessionStartPlay() requires playback mode parameter (missing in our code)
Solution:
- Use parseInt() to convert jamClient string returns to numbers
- Pass playback mode parameter 1 (normal playback) to SessionStartPlay()
- Matches legacy implementation: SessionStartPlay(1) or SessionStartPlay(data.playbackMode)
This should enable:
- Slider to move during playback (now has numeric position values)
- Audio to actually start playing (correct API call with parameter)
- Time displays to update correctly
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Fixes UAT-002: Player showing NaN:NaN and slider positioning incorrectly
Root Cause: jam-ui's jamClientProxy uses Proxy pattern where ALL methods
return Promises (via sendWhenReady → sendMessage → deferred.promise). Code
was calling SessionGetTracksPlayDurationMs(), SessionCurrrentPlayPosMs(),
and isSessionTrackPlaying() synchronously without await.
Result: Promise objects were passed to formatTime() and slider calculations,
causing NaN values and incorrect slider behavior.
Solution:
- Wrapped initialization duration fetch in async function with await
- Changed polling setInterval callback to async function with await for all calls
- Now correctly awaits all jamClient Promise-based methods
This matches jam-ui's async jamClient architecture (different from legacy
web's synchronous bridge API).
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Addresses UAT-002 (to be logged): Player showing NaN:NaN for time displays
Problem: jamClient methods returning undefined/null/NaN values causing
time displays to show "NaN:NaN" and slider to position incorrectly.
Solution:
- Add null/NaN checks to formatTime utility (return "0:00" for invalid values)
- Add validation in initialization useEffect for duration values
- Add validation in polling useEffect for position and duration values
- Add console logging to diagnose what jamClient methods are returning
This ensures the UI displays valid times even when jamClient returns
unexpected values, and provides logging to diagnose the root cause.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Fixes UAT-001: Backing track player not opening due to Redux state mutation error
Problem: jamClient object (non-serializable) was being stored in Redux state at
activeSession.backingTrackData.jamClient, causing Redux to throw immutability
violation errors when dispatching setBackingTrackData action.
Solution:
- Remove jamClient from Redux state in setBackingTrackData dispatch
- Pass jamClient directly as prop from JKSessionScreen component scope
- jamClient remains accessible to JKSessionBackingTrackPlayer without Redux storage
This fixes the blocker preventing backing track player from opening and allows
Phase 2 seek functionality testing to proceed.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Tasks completed: 3/3
- Add state for position in milliseconds
- Wire slider to reflect current position
- Implement functional handleSeek
SUMMARY: .planning/phases/02-backing-track-seek-controls/02-01-SUMMARY.md
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Replace placeholder handleSeek with functional implementation that
calls jamClient.SessionTrackSeekMs(). Uses optimistic UI update for
responsive UX, then seeks the native client. Polling useEffect will
sync actual position within 500ms to correct any drift.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Update seek slider inputs in both popup and modal versions to use
currentPositionMs state for value and durationMs for max range.
Slider now reflects live playback position and updates automatically
during playback via polling useEffect.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Add currentPositionMs and durationMs state variables to track playback
position in numeric form for slider calculations, separate from formatted
string display values. Update initialization and polling useEffects to
maintain both numeric and formatted values. Reset position on stop.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Create executable plan for Phase 2 with 3 tasks:
- Add state for position/duration in milliseconds
- Wire slider to reflect current position
- Implement functional handleSeek with SessionTrackSeekMs()
Plan: .planning/phases/02-backing-track-seek-controls/02-01-PLAN.md
Updates: ROADMAP.md (Phase 2: 0/1 planned), STATE.md (Phase 2 current)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Fetches duration via jamClient.SessionGetTracksPlayDurationMs() on open
- Displays duration before playback starts (e.g., "5:13" shown immediately)
- Error handling falls back to "0:00" if fetch fails
- Matches legacy web behavior of showing duration on load
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Polls jamClient.SessionCurrrentPlayPosMs() every 500ms when playing
- Updates currentTime and duration displays with formatted values
- Syncs isPlaying state with jamClient.isSessionTrackPlaying()
- Cleans up interval on pause/stop to prevent memory leaks
- Error handling logs to console but continues polling
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Converts milliseconds to M:SS format matching legacy web prettyPrintSeconds
- No padding on minutes (1:02 not 01:02)
- Pads seconds with leading zero when needed
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Modernize media opening features (Backing Track, JamTrack, Metronome) from legacy jQuery/Rails to React patterns in jam-ui
Creates PROJECT.md with requirements and constraints.
Complete migration from CurrentSessionContext to Redux for all session state management:
Core Redux enhancements:
- Add selectInSession selector to replace inSession() function
- Add updateSessionData action for partial session updates
Hooks migrated (6 files):
- useSessionModel.js: Complex migration with ref pattern for performance
- useSessionHelper.js: Migrate to Redux selectors
- useRecordingHelpers.js: Use selectSessionId from Redux
- useMixerStore.js: Use selectInSession from Redux
- useMixerHelper.js: Migrate currentSession and inSession to Redux
- Remove CurrentSessionContext usage across all hooks
Components migrated (3 files):
- JKSessionScreen.js: Remove context, add Redux with ref pattern
- JKSessionRemoteTracks.js: Migrate to Redux selectors
- JKSessionOpenMenu.js: Remove unused context import
Context cleanup:
- JKClientLayout.js: Remove CurrentSessionProvider from component tree
- CurrentSessionContext.js: Add comprehensive deprecation warning
Testing:
- Add 5 new Phase 4 unit tests for selectInSession and updateSessionData
- All 56 tests passing (21 Phase 1 + 25 Phase 2 + 5 Phase 3 + 5 Phase 4)
Migration benefits:
- Single source of truth in Redux for all session state
- No more duplicate state between context and Redux
- Better debugging with Redux DevTools
- Consistent patterns across all phases
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Create MediaContext - Unified state management for all media types
- Enhance WindowPortal - Better window lifecycle and communication
- Implement JKPopupMediaControls - Main media controls component
- Integrate MediaContext into JKSessionScreen
- Update JKSessionOpenMenu to use new media context
__Solution__: Removed the global assignment entirely since:
- The `jamClient` is already available through `JamServerContext`
- No usage of `window.jamClient` was found in the codebase
- The comment mentioned "iframe access" but this can be handled through proper React patterns if needed
opens file browser and let user to select the audio file.
currently shows a popup window with the player component which is
not yet complete. need to decide whether we do it via client native
popup or purely using react.
Nuwan