Fetching data async to the stream

[clementsirieix]

In the Audio component: (this is written from head so maybe not exactly what already exists)

audioTimeout = null

componentWillMount() {
    const { fetchCurrentTrack } = this.props
    fetchCurrentTrack() // should be the first call of this action
}

componentWillReceiveProps(nextProps) {
    const { currentTrack, fetchCurrentTrack } = nextProps
    
    if (currentTrack.id !== this.props.currentTrack.id) {
         this.audioTimeout = setTimeout(() => fetchCurrentTrack(), currentTrack.duration)
    }
}

componentWillUnmount() {
    clearTimeout(this.audioTimeout) // stop memory leaks
}

This process should allow only the current track to be displayed