show the status of players in the game

[Xiaohong-Deng]

on the game page, show a list of players with their status like this
guesser (online or offline or busy)
judge (online or offline or busy)
reader (online or offline or busy)

since the game can be played asynchronously, surely players want to know if other players are with them or not to avoid unnecessary idle time.

[Xiaohong-Deng]

this feature is halted. becasue the nature of websocket is every time you send a new http request, the ws connection is terminated and a new one is built. it applies to refreshing page or redirecting to the same page. the effect is when players click "Next Round", other players will see player number -1 before +1. there are techniques to overcome this, but it requires time to learn the tricks.

[Xiaohong-Deng]

Well maybe this issue can be addressed by adding a buffer. Use a method, when a player unsubscribes, call the method, the first line of the method halts the call for like 5 seconds and check how many players in the channel then update the info.

I believe there are matured ways out there to address this. But it's just my thought.

To get fancier, we can implement what Slack provides. That is a mini bar with all the role names in it and a small dot alongside each role indicating if the player is online or not.

[Xiaohong-Deng]

One thing needs to be taken into account is as follows:

• When a user hit the game page, besides updating his/her status, how should we retieve the status of other players for him/her? we should get the status from somewhere. but where? again this is like users waiting in the wating room. the status should not be persistent. once server is taken down, all status should be lost. all users should be considered offline. so Redis with persistency switched off should be an laternative.

this post may be useful How do I tell if a user is online?