fix: restore playback time with non-default rate

packages/metastream-app/src/lobby/reducers/mediaPlayer.spec.ts

@@ -1,5 +1,5 @@
 import { configureTestStore } from 'utils/tests'
-import { initLobby } from 'lobby/actions/common'
+import { initLobby, resetLobby } from 'lobby/actions/common'
 import { RepeatMode, PlaybackState, IMediaPlayerState, PlaybackRate } from './mediaPlayer'
 import {
   INITIAL_TEST_APP_STATE,
@@ -113,5 +113,21 @@ describe('mediaPlayer reducer', () => {
 
       expect(store.getState().mediaPlayer!.playbackRate).toEqual(PlaybackRate.Default)
     })
+
+    it('restores session with appropriate time', () => {
+      const store = configureTestStore({ initialState: INITIAL_TEST_APP_STATE })
+
+      store.dispatch(playPauseMedia()) // start playing
+      store.dispatch(setPlaybackRate(PlaybackRate.Max))
+
+      const initialTime = getPlaybackTime(store.getState() as any)
+
+      // save and restore session
+      store.dispatch(resetLobby({ host: true }))
+      store.dispatch(initLobby({ host: true }))
+
+      const curTime = getPlaybackTime(store.getState() as any)
+      expect(curTime).toBeCloseTo(initialTime)
+    })
   })
 })

packages/metastream-app/src/lobby/reducers/mediaPlayer.ts

@@ -20,6 +20,7 @@ import { ReplicatedState } from '../../network/types'
 import { resetLobby, initLobby } from '../actions/common'
 import { clamp } from 'utils/math'
 import { getPlaybackTime2 } from './mediaPlayer.helpers'
+import { start } from 'repl'
 
 export const enum PlaybackState {
   Idle,
@@ -301,7 +302,7 @@ export const mediaPlayer: Reducer<IMediaPlayerState> = (
       localSnapshot: {
         ...state,
         playback: isPlaying ? PlaybackState.Paused : state.playback,
-        pauseTime: isPlaying ? Date.now() - state.startTime! : state.pauseTime
+        pauseTime: isPlaying ? getPlaybackTime2(state) : state.pauseTime
       }
     }
   }