family/static/socket.js

onload(() => {
    const socket = io.connect(document.location.host);

    socket.on('flash_msg', flash_msg);

    socket.on('player_state', (data) => {
        if (!data.secret) {
            // our secret seems to be to old
            localStorage.removeItem('secret');
            return register();
        }
        //flash_msg("Logged in!");
        localStorage.setItem('secret', data.secret);
        localStorage.setItem('name', data.username);
        document.cookie = `secret=${data.secret}`;
        window.username = data.username;
        $('.username').innerText = 'playing as ' + window.username;
    });

    function register() {
        const name = localStorage.getItem('name') || prompt("Whats your username?");
        socket.emit('signup', name)
    }

    if (!localStorage.getItem('secret')) {
        register()
    } else {
        socket.emit('resume', localStorage.getItem('secret'))
    }

    window.socket = socket;
});