+ case "ISON":
+ if len(cols) == 1 || len(cols[1]) < 1 {
+ client.ReplyNotEnoughParameters("ISON")
+ continue
+ }
+ nicksKnown := make(map[string]struct{})
+ clientsM.RLock()
+ for c := range clients {
+ nicksKnown[*c.nickname] = struct{}{}
+ }
+ clientsM.RUnlock()
+ var nicksExists []string
+ for _, nickname := range strings.Split(cols[1], " ") {
+ if _, exists := nicksKnown[nickname]; exists {
+ nicksExists = append(nicksExists, nickname)
+ }
+ }
+ client.ReplyNicknamed("303", strings.Join(nicksExists, " "))