Queue Messages

The queue front-end communicates with the back-end by connecting a socket using the socket.io Javascript library.

When the queue page is served to the client, a connection with the backend queue server is established on localhost:3000.

The front-end will then communicate queue joins with the back-end, which will update the queues for each of the connected front-end clients respectively.

The communication standard is documented on this page.

Event	Description	Sender	Receiver	Packet
N/A	Frontend client connects to the queue	frontend	backend	No packet just a connection
join	Frontend joins a queue	frontend	backend	{user: {id, name, questions_asked, signed_on, join_time}, queue}
leave	Frontend leaves a queue	frontend	backend	{user, queue}
update	Backend requests all clients update a queue	backend	frontend	{waiting, queue}