func listQuery(conn *irc.Conn, channelName string) (*Result, error) {
conn.SendRawf("LIST %s", channelName)
numusers := 0
topic := ""
received322 := false
for {
ev, err := conn.WaitUntil(
"322", // RPL_LIST
"323", // RPL_LISTEND
"401", // ERR_NOSUCHNICK (nick/channel)
"403", // ERR_NOSUCHCHANNEL
)
if err != nil {
return nil, err
}
switch ev.Code {
case "322":
received322 = true
if len(ev.Args) < 4 {
return nil, fmt.Errorf("Unexpectedly short LIST response on %s", channelName)
}
numusers, err = strconv.Atoi(ev.Args[2])
if err != nil {
return nil, fmt.Errorf("Failed to parse number of channel users: %s", err.Error())
}
topic = ev.Args[3]
case "323":
if received322 == false {
return nil, fmt.Errorf("No status data for %s received on query", channelName)
}
goto ret
case "401":
fallthrough
case "403":
return nil, fmt.Errorf("No such channel, '%s'", channelName)
}
}
ret:
return &Result{
NumberOfUsers: numusers,
Topic: topic,
}, nil
}
func joinQuery(conn *irc.Conn, channelName string) (*Result, error) {
conn.SendRawf("JOIN %s", channelName)
conn.SendRawf("TOPIC %s", channelName)
numusers := 0
topic := ""
receivedTopic, receivedNames := false, false
for {
ev, err := conn.WaitUntil(
"353", // RPL_NAMREPLY
"366", // RPL_ENDOFNAMES
"331", // RPL_NOTOPIC
"332", // RPL_TOPIC
"422", // ERR_NOMOTD
)
if err != nil {
return nil, err
}
switch ev.Code {
case "353":
if len(ev.Args) != 0 {
numusers += len(strings.Split(ev.Args[len(ev.Args)-1], " "))
}
case "332":
topic = ev.Args[len(ev.Args)-1]
receivedTopic = true
case "366":
receivedNames = true
case "422":
continue
case "331":
receivedTopic = true
}
if receivedNames && receivedTopic {
break
}
}
// TODO: Make it possible to add a parting message
conn.SendRawf("PART %s", channelName)
return &Result{
NumberOfUsers: numusers,
Topic: topic,
}, nil
}