package main

type game struct {
	players    map[*player]bool
	broadcast  chan *player
	register   chan *player
	unregister chan *player
}

var g = game{
	broadcast:  make(chan *player),
	register:   make(chan *player),
	unregister: make(chan *player),
	players:    make(map[*player]bool),
}

func (g *game) run() {
	for {
		select {
		case c := <-g.register:
			g.players[c] = true
		case c := <-g.unregister:
			delete(g.players, c)
			close(c.send)
		case p := <-g.broadcast:
			for c := range g.players {
				if p != c {
					select {
					case c.send <- p:
					default:
						delete(g.players, c)
						close(c.send)
						go c.ws.Close()
					}
				}
			}
		}
	}
}