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package main
import (
"fmt"
"log/slog"
)
func init() {
commandHandlers["NICK"] = handleClientNick
}
func handleClientNick(msg RMsg, client *Client) error {
if len(msg.Params) < 1 {
return client.Send(MakeMsg(self, ERR_NEEDMOREPARAMS, "NICK", "Not enough parameters"))
}
already, exists := nickToClient.LoadOrStore(msg.Params[0], client)
if exists {
if already != client {
err := client.Send(MakeMsg(self, ERR_NICKNAMEINUSE, client.Nick, msg.Params[0], "Nickname is already in use"))
if err != nil {
return err
}
}
} else {
if client.State == ClientStateRegistered {
if !nickToClient.CompareAndDelete(client.Nick, client) {
slog.Error("nick inconsistent", "nick", client.Nick, "client", client)
return fmt.Errorf("%w: %v", ErrInconsistent, client)
}
err := client.Send(MakeMsg(client, "NICK", msg.Params[0]))
if err != nil {
return err
}
}
client.Nick = msg.Params[0]
}
if client.State == ClientStatePreRegistration {
err := client.checkRegistration()
if err != nil {
return err
}
}
return nil
}
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