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- // Copyright (c) 2012-2014 Jeremy Latt
- // Copyright (c) 2016-2017 Daniel Oaks <daniel@danieloaks.net>
- // released under the MIT license
-
- package irc
-
- import (
- "crypto/rand"
- "encoding/hex"
- "fmt"
- "strings"
-
- "github.com/goshuirc/irc-go/ircfmt"
- "github.com/oragono/oragono/irc/sno"
- )
-
- var (
- restrictedNicknames = map[string]bool{
- "=scene=": true, // used for rp commands
- "chanserv": true,
- "nickserv": true,
- "hostserv": true,
- }
- )
-
- // returns whether the change succeeded or failed
- func performNickChange(server *Server, client *Client, target *Client, newnick string, rb *ResponseBuffer) bool {
- nickname := strings.TrimSpace(newnick)
- cfnick, err := CasefoldName(nickname)
-
- if len(nickname) < 1 {
- rb.Add(nil, server.name, ERR_NONICKNAMEGIVEN, client.nick, client.t("No nickname given"))
- return false
- }
-
- if err != nil || len(nickname) > server.Limits().NickLen || restrictedNicknames[cfnick] {
- rb.Add(nil, server.name, ERR_ERRONEUSNICKNAME, client.nick, nickname, client.t("Erroneous nickname"))
- return false
- }
-
- if target.Nick() == nickname {
- return true
- }
-
- hadNick := target.HasNick()
- origNick := target.Nick()
- origNickMask := target.NickMaskString()
- err = client.server.clients.SetNick(target, nickname)
- if err == errNicknameInUse {
- rb.Add(nil, server.name, ERR_NICKNAMEINUSE, client.nick, nickname, client.t("Nickname is already in use"))
- return false
- } else if err == errNicknameReserved {
- rb.Add(nil, server.name, ERR_NICKNAMEINUSE, client.nick, nickname, client.t("Nickname is reserved by a different account"))
- return false
- } else if err != nil {
- rb.Add(nil, server.name, ERR_UNKNOWNERROR, client.nick, "NICK", fmt.Sprintf(client.t("Could not set or change nickname: %s"), err.Error()))
- return false
- }
-
- client.nickTimer.Touch()
-
- client.server.logger.Debug("nick", fmt.Sprintf("%s changed nickname to %s [%s]", origNickMask, nickname, cfnick))
- if hadNick {
- target.server.snomasks.Send(sno.LocalNicks, fmt.Sprintf(ircfmt.Unescape("$%s$r changed nickname to %s"), origNick, nickname))
- target.server.whoWas.Append(client)
- for friend := range target.Friends() {
- friend.Send(nil, origNickMask, "NICK", nickname)
- }
- }
-
- if target.Registered() {
- client.server.monitorManager.AlertAbout(target, true)
- }
- // else: Run() will attempt registration immediately after this
- return true
- }
-
- func (server *Server) RandomlyRename(client *Client) {
- prefix := server.AccountConfig().NickReservation.RenamePrefix
- if prefix == "" {
- prefix = "Guest-"
- }
- buf := make([]byte, 8)
- rand.Read(buf)
- nick := fmt.Sprintf("%s%s", prefix, hex.EncodeToString(buf))
- rb := NewResponseBuffer(client)
- performNickChange(server, client, client, nick, rb)
- rb.Send()
- // technically performNickChange can fail to change the nick,
- // but if they're still delinquent, the timer will get them later
- }
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