/
handlemessages.go
55 lines (49 loc) · 1.21 KB
/
handlemessages.go
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package cmd
// Hub maintains the set of active clients and broadcasts messages to the
// clients.
type Hub struct {
// Registered clients.
clients map[string]map[*Client]bool
// Inbound messages from the clients.
broadcast chan message
// Register requests from the clients.
register chan *Client
// Unregister requests from clients.
unregister chan *Client
}
func newHub() *Hub {
return &Hub{
broadcast: make(chan message),
register: make(chan *Client),
unregister: make(chan *Client),
clients: make(map[string]map[*Client]bool),
}
}
func (h *Hub) run() {
for {
select {
case client := <-h.register:
if _, ok := h.clients[client.topic]; !ok {
h.clients[client.topic] = make(map[*Client]bool)
}
h.clients[client.topic][client] = true
case client := <-h.unregister:
if _, ok := h.clients[client.topic]; ok {
delete(h.clients[client.topic], client)
close(client.send)
}
case message := <-h.broadcast:
topic := message.sender.topic
for client := range h.clients[topic] {
if client.name != message.sender.name {
select {
case client.send <- message:
default:
close(client.send)
delete(h.clients[topic], client)
}
}
}
}
}
}