Root cause: WebRTC call ringing continued forever after cancellation
because ringing, WebRTC, and notifications were owned by CallController
which lived in viewModelScope (account lifetime), not by CallActivity.
Cleanup depended on a state collector observing Ended in time, which
raced, dropped, and went stale.
Architecture after fix:
- CallManager (background, AccountViewModel scope): state machine only.
No audio, no WebRTC, no notifications. Exposes state as StateFlow,
renegotiation events as SharedFlow, and a 65-second ringing watchdog
as a fail-safe.
- CallSession (Activity-scoped, replaces CallController): owns all call
resources. Created in onCreate, destroyed via close() in onDestroy.
Implements AutoCloseable. No cleanedUp guard flag needed.
- CallSessionBridge: slimmed down — holds only callManager +
accountViewModel for cross-Activity reference sharing. No
callController field.
Key changes:
- CallController renamed to CallSession, moved to ui/call/session/.
- CallSession.close() replaces cleanup() — single-shot, no guard flags.
- CallActivity creates and owns CallSession directly.
- CallManager.onRenegotiationOfferReceived callback replaced with
renegotiationEvents SharedFlow (buffered, survives Activity restarts).
- CallManager gains ringing watchdog (65s) that forces Ended(TIMEOUT)
if state stays in IncomingCall/Offering past the deadline.
- CallNotifier extracted from NotificationUtils into dedicated class.
- AccountViewModel.initCallController deleted; callManager wired to
newNotesPreProcessor eagerly in init block.
- ChatroomScreen uses CallActivity.launchForOutgoingCall() with intent
extras instead of directly calling callController.initiateGroupCall().
- AndroidManifest adds navigation|fontScale|density to configChanges
so no config change recreates CallActivity mid-call.
Invariants:
1. CallActivity.onDestroy → session.close() → all resources released.
2. Ringing cannot outlive any code path: Activity close, state
collector, and 65s watchdog provide three independent stop paths.
3. Config changes cannot kill the call (manifest prevents recreation).
4. No global mutable singleton for CallController.
https://claude.ai/code/session_019yNnDjGKmJb19gadmojq54
Claude
3cddda6ef9