Player not advancing to next block in background mode

[gshotwell]

When you lock the device it will play the end of the current gong or contemplation, but not advance to the next block

[gshotwell]

Ah, it looks like this is an Apple TOS issue. I don't know how to fix this. ocetnik/react-native-background-timer#9

https://developer.apple.com/library/content/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/BackgroundExecution/BackgroundExecution.html

[gshotwell]

I think this might be doable if I keep a silent sound running throughout the whole timer, so two tracks playing, one of which is a silent sound which repeats and has a volume of zero, the other is the actual session track.

[gshotwell]

Works! It seems like if I do a console log when the video loads it plays properly. I have no idea why this works but I'll take it.

[gshotwell]

Doesn't work! Looks like I need to refactor to have everything on RN Sound as they are enabling loading sounds from the network

[gshotwell]

zmxv/react-native-sound#134

[gshotwell]

Boy this is a tough issue. The big issue is that we need to preload each block file, but at the same time we need to make sure that we don't have a hundred sounds loaded up. So we need some process to load sounds a fe blocks ahead of time, so that there aren't any gaps when they play.

Here is my current plan:

• 1) Load the first block into state state.firstSound on componentWillMount()
• 2) At the same time load the first four sounds into a stateful array with a key this.state.loadedSounds
• 3) Load first block into this.state.playingSound()
• 4) Whenever we finish a block, load the block from the loadedSounds array which matches the next block in the playerArray into this.state.playingSound. At the same time load the i + 4th sound and push it to this.state.loadedSounds. We also need to release the sound which was previously playing.
• 5) Add a spinner so that whenever this.state.playingSound isn't loaded the player pauses itself, spins, then unpauses itself when the block loads.
• 6) Keep the firstSound loaded in state, and when the timer is reset move it back to this.state.playingSound and then redo the rest.
• 7) Release all sounds when component unmounts

Test cases:

• play one of each block in background
• play two gongs next to eachother
• play two contemplations next to eachother
• play two sitting sessions next to eachother
• play a session with one block
• play a session with 10 blocks.