Add automatch stats

[benjaminpjones]

Summary

OGS provides live player stats for the automatch queue via /termination-api/automatch-stats.

This PR uses it to populate AutomatchPresets.playerCount (sort of).

Discussion needed Resolved!

GameClient.automatchPresets is a synchronous API. Therefore, playerCount is not available when the list is requested by ServerLobbyPage.

There are two potential fixes:

• Make GameClient.automatchPresets return a Future so that we can make network requests.
• [preferred] split out playerCount into a separate, asynchronous method or ValueNotifier.

I need help deciding how to resolve as this would affect the other clients (probably in a good way)

Testing

Note: because of the login/sync/caching issue, this only works if you navigate to another screen (e.g. game record page) and return to the lobby page after the cache has been set.

[ale64bit]

[preferred] split out playerCount into a separate, asynchronous method or ValueNotifier.

I agree! This would be the cleanest solution. I can refactor it so that playerCount is removed from the preset and we add a new:

ValueNotifier<IMap<String, AutomatchStats>> get automatchStats;

to GameClient, where AutomatchStats is a class containing playerCount (and potentially other fields later on).

[ale64bit]

this is now ready in cbd33d5

[benjaminpjones]

@ale64bit Amazing, thank you! I updated this PR and re-tested. Now the player counts show up on first load!