Root cause fix: useMixerHelper was reading backingTracks from Redux
but not returning it in the hook's return object, causing
mixerHelper.backingTracks to always be undefined.
The issue:
- Line 88: Reads backingTracks from Redux mediaSlice
- Line 89: Reads jamTracks from Redux mediaSlice
- Line 90: Reads recordedTracks from Redux mediaSlice
- Line 831-847: Return object MISSING these three properties
This caused:
- WebSocket MIXER_CHANGES dispatches setBackingTracks() ✓
- Redux mediaSlice.backingTracks updates ✓
- useMixerHelper reads it via selector ✓
- But doesn't expose it to components ✗
- Result: mixerHelper.backingTracks always undefined
Fix:
Added backingTracks, jamTracks, recordedTracks to return object.
Now the full data flow works:
1. WebSocket MIXER_CHANGES arrives
2. Dispatches setBackingTracks(mixers.backingTracks)
3. Redux mediaSlice updates
4. useMixerHelper reads via selector
5. Returns in hook object
6. Components access via mixerHelper.backingTracks
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Fixes issue where backing track wasn't appearing because mixerHelper
data hadn't arrived yet via WebSocket. Now shows section immediately
with loading state until mixer data arrives.
Changes:
- Removed dependency on mixerHelper.backingTracks for initial display
- Section now shows when showBackingTrackPlayer is true
- Header shows filename from backingTrackData.backingTrack immediately
- Displays "Loading backing track controls..." until mixer data arrives
- Once MIXER_CHANGES WebSocket message arrives, shows full track with VU/gain
Display flow:
1. Player opens → showBackingTrackPlayer = true
2. Section immediately appears with header and filename
3. Shows loading message for controls
4. WebSocket MIXER_CHANGES arrives → mixerHelper.backingTracks populated
5. Full track controls appear (VU meter, gain, pan menu)
This provides immediate visual feedback while waiting for server data.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Fixes backing track display to show when the player popup is open,
matching JamTrack behavior. Also properly clears all state when closed.
Changes:
- Added showBackingTrackPlayer boolean from backingTrackData
- Updated conditional render to check showBackingTrackPlayer
- Track now displays only when popup is actually open
- handleBackingTrackMainClose now clears backingTrackData
- Also closes the modal to ensure popup is hidden
Display flow:
1. User selects backing track
2. handleBackingTrackSelected opens file and sets backingTrackData
3. Player popup opens (showBackingTrackPlayer = true)
4. WebSocket MIXER_CHANGES updates mixerHelper.backingTracks
5. Track appears in session screen (both conditions met)
6. Clicking close removes track and closes popup
Close flow:
1. Calls closeMedia() to close native client media
2. Clears backingTrackData (hides track and popup)
3. Closes modal (ensures popup window closes)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Matches JamTrack section format by adding a header showing
"Backing Track: {filename}" with a close link.
Changes:
- Added h5 header in JKSessionScreen with backing track filename
- Added close link with FontAwesome times icon
- Removed duplicate internal header from JKSessionBackingTrack component
- Now displays: "Backing Track: {shortFilename}" at the top
- Close link triggers handleBackingTrackMainClose
Format now matches JamTrack section:
- Header with name and close link
- Single track with instrument icon and mixer controls
- Consistent styling with border separator
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Shows JamTrack stems in session screen only when the player is ready
to play (after download/packaging is complete), matching backing track
behavior.
Changes:
- Added jamTrackDownloadState selector
- Updated conditional render to check download state
- Stems now show when state is 'synchronized' or 'idle'
- Prevents showing stems during packaging/downloading
Stems display flow:
1. User selects JamTrack from modal
2. handleJamTrackSelect fetches JamTrack with stems
3. Sets selectedJamTrack and jamTrackStems in Redux
4. Player opens and begins packaging/downloading if needed
5. Once downloadState becomes 'synchronized', stems appear in session
6. Clicking close (player or session) removes stems and closes player
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Fixes close functionality for both JamTrack player and session screen:
- Moved handleJamTrackClose to proper location with useCallback
- Player close button now calls full close handler (API + state cleanup)
- WindowPortal X button now calls full close handler
- Session screen close button uses same handler
- Clears selectedJamTrack, jamTrackStems, and jamTrackData on close
- Calls REST API closeJamTrack to notify server
- Removed duplicate handleJamTrackClose function
Close flow now properly:
1. Calls closeJamTrack REST API with session ID
2. Clears selectedJamTrack and jamTrackStems (hides stems in session)
3. Clears jamTrackData (closes player popup)
4. Shows success/error toast
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Changes JamTrack player to use inline styles matching the backing track
player's simpler approach while keeping the macOS window chrome.
- Removed CSS file import, switched to inline styles
- Matched backing track player's control layout
- Circular play (36px) and stop (36px) buttons
- Time + scrubber + time in one row matching backing track
- Mix dropdown and "create custom mix" link below controls
- Close button at bottom centered
- All spacing and colors match backing track player
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Matches design from screenshot with:
- Window chrome with traffic light controls
- Circular play/pause and square stop buttons
- Custom audio scrubber with progress and thumb
- Styled mix selector dropdown
- 'create custom mix' link
- Close button
- Updated error and state banners
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Issue: jamServer was undefined in downloadJamTrack thunk
Root cause: One loadJamTrack call in handlePlay was missing jamServer parameter
Fix:
- Added jamServer to loadJamTrack call on line 194
- Added jamServer to dependency array on line 384
- Removed debug logging
All loadJamTrack calls now properly pass jamServer with subscribe/unsubscribe.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Issue: "WebSocket connection not available" error
Root cause: Getting 'server' object instead of subscribe/unsubscribe methods
Fix: Extract subscribe/unsubscribe directly from useJamServerContext()
and create jamServer object with those methods for the thunks.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Issue: window.JK.SubscriptionUtils not available in session screen
Solution: Implement WebSocket subscribe/unsubscribe directly in React
Changes:
1. useJamServer: Added subscribe/unsubscribe methods using MessageFactory
2. JamServerContext: Exposed subscribe/unsubscribe to React components
3. useSessionWebSocket: Handle SUBSCRIPTION_MESSAGE and dispatch to Redux
4. mediaSlice: Use jamServer.subscribe instead of legacy SubscriptionUtils
5. JKSessionJamTrackPlayer: Pass jamServer to loadJamTrack thunk
Now the packaging flow works without relying on legacy jQuery code:
- Subscribe: jamServer.subscribe('mixdown', packageId)
- Server sends: SUBSCRIPTION_MESSAGE with packaging progress
- Handler updates: Redux downloadState via setDownloadState()
- Unsubscribe: jamServer.unsubscribe('mixdown', packageId)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Issue: Packaging timeout after 60 seconds with no progress updates
Root cause: Not subscribed to WebSocket notifications for packaging progress
Solution:
1. Subscribe to mixdown package using window.JK.SubscriptionUtils.subscribe()
2. Listen to jQuery SUBSCRIBE_NOTIFICATION events from the watch object
3. Update Redux state when packaging progress notifications arrive
4. Unsubscribe when packaging completes (success/error/timeout)
The legacy SubscriptionUtils system handles:
- Sending subscribe message to WebSocket gateway
- Receiving SUBSCRIPTION_MESSAGE from server
- Triggering jQuery events on watch objects
- Managing subscription lifecycle
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Backend expects:
- id: mixdown ID (not package ID)
- file_type, encrypt_type, sample_rate: package attributes
The controller finds or creates the package based on these attributes.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
The enqueueMixdown function was already defined in rest.js at line 694.
Removed the duplicate definition added at line 561 and updated the call
in mediaSlice.js to use the existing function signature.
Changes:
- Removed duplicate enqueueMixdown(packageId) at line 561
- Updated call to use existing signature: enqueueMixdown({ id: packageId })
- Existing function signature: enqueueMixdown(options) where options.id is the package ID
Fixes parsing error: "Identifier 'enqueueMixdown' has already been declared"
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Implements the missing server-side packaging phase that exists in the
legacy system. JamTracks must be packaged/signed on the server before
they can be downloaded.
**Legacy System Flow (8 states):**
1. initial → 2. packaging → 3. downloading → 4. keying → 5. synchronized
**Previous Implementation (6 states - INCORRECT):**
1. idle → 2. checking → 3. downloading (skipped packaging!)
**New Implementation (7 states - CORRECT):**
1. idle → 2. checking → 3. packaging → 4. downloading → 5. keying → 6. synchronized
Changes:
1. REST API (rest.js):
- Added enqueueMixdown(packageId) endpoint
- POST /mixdowns/{packageId}/enqueue
2. Redux State (mediaSlice.js):
- Added 'packaging' state to downloadState
- Added packageId, packaging_steps, current_packaging_step, signing_state fields
- Updated clearDownloadState to reset new fields
3. Download Logic (mediaSlice.js downloadJamTrack thunk):
- Added packaging phase before download
- Calls enqueueMixdown API
- Waits for signing_state === 'SIGNED' (polls Redux state every 500ms)
- 60 second timeout with clear error messages
- Only proceeds to download after package is signed
4. WebSocket Handler (useSessionWebSocket.js):
- Added SUBSCRIBE_NOTIFICATION handler
- Updates packaging progress: signing_state, packaging_steps, current_packaging_step
- Handles packaging errors: ERROR, SIGNING_TIMEOUT, QUEUED_TIMEOUT, QUIET_TIMEOUT
- Logs packaging progress for debugging
5. UI (JKSessionJamTrackPlayer.js):
- Added packaging state display
- Shows "Your JamTrack is currently being created in the JamKazam server"
- Displays signing_state and step progress (X of Y)
- Shows spinner during packaging
- Matches legacy system UX
This fixes the critical issue where JamTracks were attempted to be
downloaded without server-side packaging, which would always fail.
The flow now matches the legacy download_jamtrack.js.coffee behavior
documented in .planning/codebase/JAMTRACK_LEGACY.md lines 57-85.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Error: "Objects are not valid as a React child (found: object with keys
{id, description, created_at, updated_at, popularity})"
Root cause:
- JKSessionMyTrack.js line 191 was rendering {track?.instrument} directly
- track.instrument is an object, not a string
- React cannot render objects as children - they must be primitives
This error appeared when JamTrack stems were displayed on the session
screen after selecting a JamTrack. The stems use JKSessionMyTrack
components which have instrument tooltips.
Solution:
Changed tooltip content from:
{track?.instrument}
To:
{track?.instrument?.description || track?.instrument?.name || 'Unknown Instrument'}
This extracts the description string from the instrument object, with
fallbacks to name or a default string.
Fixes crash when hovering over JamTrack stem instruments.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Two critical fixes:
1. Error Boundary Crash
- errorInfo can be null between getDerivedStateFromError and componentDidCatch
- Added null check: {this.state.errorInfo && this.state.errorInfo.componentStack}
- Prevents "Cannot read properties of null" error
2. Sample Rate Mismatch
- Removed fallback to different sample rates (tier 4)
- Native client CANNOT play packages with mismatched sample rates
- If client is 44kHz but package is 48kHz, play will fail with "Unable to play JamTrack"
- Now throws clear error: "No package available for sample rate 44kHz. Available rates: 48kHz"
Root cause of play failure:
- Client sample rate: 44kHz (from GetSampleRate 44.099998...)
- Package downloaded: 48kHz (only available package)
- fqId built: jamTrack.id-44 (based on client rate)
- Native client cannot play 48kHz files with 44kHz fqId → Play fails
Solution:
- Sample rate fallback removed - must match exactly
- User gets actionable error message suggesting to restart audio interface
or select different sample rate
Fixes "Unable to play JamTrack" error and error boundary crash.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
The strict pickMyPackage logic failed when JamTracks only have mp3
packages or packages at different sample rates. The test JamTrack "db"
only has: mp3, null encryption, 48kHz - none of which matched the
search criteria (ogg, jkz, 44kHz).
Implemented a 4-tier fallback strategy:
1. Ideal: ogg + jkz encryption + matching sample rate
2. Fallback 1: ogg + any encryption + matching sample rate
3. Fallback 2: any format + matching sample rate
4. Last resort: first available package (with warning)
This allows the player to work with:
- Demo/test JamTracks that may only have mp3 packages
- JamTracks without encryption
- Sample rate mismatches (44kHz client, 48kHz package)
The warning log helps identify when we're using a non-ideal package.
Removed debug logging as the package structure is now understood.
Fixes "No compatible package found" error for JamTracks without
ideal package configurations.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Added console.log statements to inspect the actual package data structure
returned from the REST API. This will help identify:
- Correct field names (snake_case vs camelCase)
- Actual values for file_type, encrypt_type, sample_rate
- Available packages for debugging "No compatible package" errors
Also updated the compatiblePackage search to check both naming conventions:
- pkg.file_type or pkg.fileType
- pkg.encrypt_type or pkg.encryptType
- pkg.sample_rate or pkg.sampleRate
This is a temporary debugging commit to diagnose the package matching issue.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Error: "No compatible package found for sample rate 44.099998474121094kHz"
Root cause:
- jamClient.GetSampleRate() returns floating-point: 44.099998474121094
- Package sample_rate is stored as integer: 44
- Strict equality check (===) fails due to type/precision mismatch
Solution:
Normalize the sample rate before comparison using the same logic as
fqId construction: rawSampleRate >= 46 ? 48 : 44
This converts:
- 44.099998474121094 → 44
- 48.0 → 48
Matches the pattern used in loadJamTrack thunk where fqId is built as:
`${jamTrack.id}-${sampleRate === 48 ? '48' : '44'}`
Fixes "No compatible package found for sample rate" error.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
The error "Mixdown has no packages available" occurred because we were
calling jamClient.JamTrackGetMixdowns() which returns a different data
structure without the packages array. The packages are only available
in the mixdowns returned from the REST API endpoint /api/jamtracks/{id}.
Root cause:
- jamClient.JamTrackGetMixdowns() returns simplified mixdown metadata
- Full mixdown data with packages comes from REST API via getJamTrack()
- The jamTrack object passed to downloadJamTrack already has mixdowns
with their packages array
Changes to mediaSlice.js downloadJamTrack:
- Use jamTrack.mixdowns directly instead of calling jamClient API
- Add comment explaining the difference in data sources
- Improve error messages with mixdown names for debugging
Changes to JKSessionJamTrackPlayer.js:
- Use jamTrack.mixdowns directly in initialization
- Update comment to clarify data source
This ensures the pickMyPackage logic has access to the packages array
needed to select the correct package variant (ogg, jkz, sample rate).
Fixes "Mixdown has no packages available" error during JamTrack playback.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
The downloadJamTrack thunk was failing with "No mixdown package available"
because it was trying to access mixdowns[0].packageId directly. Mixdowns
have a packages array, and the correct package must be selected based on
client capabilities (pickMyPackage logic from legacy implementation).
Changes to downloadJamTrack thunk:
- Get client sample rate via jamClient.GetSampleRate()
- Find mixdown by mixdownId if provided, else use first mixdown
- Implement pickMyPackage logic to find compatible package:
* file_type === 'ogg'
* encrypt_type === 'jkz'
* sample_rate === clientSampleRate (44 or 48 kHz)
- Extract packageId from selected package
- Add detailed error messages for each failure case
This matches the legacy JamTrackStore.pickMyPackage() behavior documented
in .planning/codebase/JAMTRACK_LEGACY.md lines 126-130.
Fixes "No mixdown package available" error during JamTrack playback.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Added jamTrackData state to activeSessionSlice following the same
pattern as backingTrackData. This properly separates concerns:
- jamTrackData stores full player data (jamTrack, session, currentUser)
- Presence of jamTrackData indicates player should be shown
Changes to activeSessionSlice.js:
- Add jamTrackData: null to initial state
- Add setJamTrackData and clearJamTrackData reducers
- Export actions and selectJamTrackData selector
Changes to JKSessionScreen.js:
- Import setJamTrackData, clearJamTrackData, selectJamTrackData
- Remove openJamTrack usage from sessionUISlice
- Update handleJamTrackSelect to dispatch setJamTrackData
- Update selectors to use jamTrackData
- Update render to pass jamTrackData.jamTrack to player
Fixes "Cannot read properties of undefined (reading 'id')" error
where jamTrack prop was undefined due to incorrect state structure.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
JamTrack player component was created in Phase 5 but never integrated
into JKSessionScreen. The player now appears in a popup window when a
JamTrack is selected from the browser.
Changes:
- Import JKSessionJamTrackPlayer component
- Import setOpenJamTrack, clearOpenJamTrack, selectOpenJamTrack from Redux
- Add openJamTrack and showJamTrackPlayer selectors
- Add handleJamTrackPlayerClose callback
- Update handleJamTrackSelect to dispatch setOpenJamTrack
- Add conditional rendering of JamTrack player with WindowPortal
Follows the same pattern as BackingTrack player integration.
Resolves issue where stems displayed but player popup didn't appear.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Add handleCancelDownload callback to cancel downloads via JamTrackCancelDownload
- Add handleRetryDownload callback to retry failed downloads
- Implement 6-state sync machine UI (checking, downloading, keying, error)
- Show progress bar with percentage (0-100%) during download
- Show step indicator (X of Y) when available
- Display Cancel button during download state
- Display Retry button on error state with error message
- Hide UI for idle and synchronized states (normal playback)
- Import setDownloadState from mediaSlice
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Add JamTrackGetMixdowns API call during player initialization
- Organize mixdowns into master/customMixes/stems hierarchy
- Store availableMixdowns in Redux (activeSessionSlice)
- Set default mixdown selection (prefer master, fallback to first)
- Set activeMixdown in Redux for UI display
- Non-fatal error handling (can play without explicit selection)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Add handleSeek with useCallback wrapper
- Implement UAT-003 fix pattern (pending seek while paused, immediate while playing)
- Store pending seek in pendingSeekRef when paused, update UI immediately
- Apply pending seek on resume in handlePlay (already implemented)
- Add seek slider with correct min/max/value bindings
- Disable slider during operations and before duration loaded
- Parse slider value to int before passing to handler
- Error handling for seek failures
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Add polling effect with 500ms visible, 2000ms hidden intervals
- Fetch position and duration via JamTrackGetPositionMs/GetDurationMs
- Parse string values to int before using
- Conditional state updates (only when values change)
- End-of-track handling (stop and reset when position >= duration)
- Add formatTime utility for MM:SS display
- Update render to show formatted time
- Add visibilitychange listener for dynamic interval adjustment
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Add handlePlay with loadJamTrack integration and pause-resume logic
- Add handlePause for pausing playback
- Add handleStop for stopping and resetting position
- Implement UAT-003 fix pattern (pendingSeekRef for pause-seek-resume)
- Add isOperating flag to prevent rapid clicks
- Render playback buttons with proper disabled states
- Error handling with typed errors (file/network red, playback yellow)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Enhanced loadJamTrack: checks sync state, triggers download if needed
- downloadJamTrack: handles download flow with progress callbacks
- checkJamTrackSync: verifies track synchronization state
- loadJMEP: loads JMEP data if available
- seekJamTrack: applies UAT-003 fix pattern for pending seek while paused
- closeJamTrack: stops playback and clears state
- All thunks use fqId format correctly
- Global callbacks set up for native client download progress
- extraReducers handle all loading states
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Summary:
- Fixed critical fqId bug blocking JamTrack functionality
- Established Redux foundation with 10 new reducers and 8 new selectors
- Extended mediaSlice with jamTrackState and downloadState structures
- Extended activeSessionSlice with mixdown management
- Extended sessionUISlice with JamTrack UI preferences
State updates:
- Phase 5 Plan 1 complete (1/5 in phase)
- Updated decisions with fqId fix and state structure patterns
- Updated session continuity for Plan 2
Commits:
- bb74c5046: fix(05-01): fix loadJamTrack fqId bug and extend mediaSlice state
- 52ee8f3ea: feat(05-01): extend activeSessionSlice and sessionUISlice for JamTrack
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
activeSessionSlice extensions:
- Add availableMixdowns array to store mixdown objects
- Add activeMixdown for currently selected mixdown
- Add mixdownCache for package metadata
- Add 4 reducers: setAvailableMixdowns, setActiveMixdown, cacheMixdownPackage, clearMixdowns
- Add 3 selectors for mixdown state
sessionUISlice extensions:
- Add openJamTrack to track currently open JamTrack ID
- Add jamTrackUI for user preferences (lastUsedMixdownId, volume)
- Add 3 reducers: setOpenJamTrack, updateJamTrackUI, clearOpenJamTrack
- Add 2 selectors for JamTrack UI state
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Phase 5: JamTrack Implementation
- Vision and goals documented
- Essential requirements identified
- Scope boundaries defined
Focus: Download + play JamTracks + select existing mixdowns
Quality bar: Match Backing Track player feel and reliability
Out of scope: Custom mix creation (future phase)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Nuwan