fix #425 and #395

irc/channel.go

@@ -377,25 +377,25 @@ func (channel *Channel) Join(client *Client, key string, isSajoin bool, rb *Resp
 	hasPrivs := isSajoin || (founder != "" && founder == details.account) || (persistentMode != 0 && persistentMode != modes.Voice)
 
 	if !hasPrivs && limit != 0 && chcount >= limit {
-		rb.Add(nil, client.server.name, ERR_CHANNELISFULL, chname, fmt.Sprintf(client.t("Cannot join channel (+%s)"), "l"))
+		rb.Add(nil, client.server.name, ERR_CHANNELISFULL, details.nick, chname, fmt.Sprintf(client.t("Cannot join channel (+%s)"), "l"))
 		return
 	}
 
 	if !hasPrivs && chkey != "" && !utils.SecretTokensMatch(chkey, key) {
-		rb.Add(nil, client.server.name, ERR_BADCHANNELKEY, chname, fmt.Sprintf(client.t("Cannot join channel (+%s)"), "k"))
+		rb.Add(nil, client.server.name, ERR_BADCHANNELKEY, details.nick, chname, fmt.Sprintf(client.t("Cannot join channel (+%s)"), "k"))
 		return
 	}
 
 	isInvited := client.CheckInvited(chcfname) || channel.lists[modes.InviteMask].Match(details.nickMaskCasefolded)
 	if !hasPrivs && channel.flags.HasMode(modes.InviteOnly) && !isInvited {
-		rb.Add(nil, client.server.name, ERR_INVITEONLYCHAN, chname, fmt.Sprintf(client.t("Cannot join channel (+%s)"), "i"))
+		rb.Add(nil, client.server.name, ERR_INVITEONLYCHAN, details.nick, chname, fmt.Sprintf(client.t("Cannot join channel (+%s)"), "i"))
 		return
 	}
 
 	if !hasPrivs && channel.lists[modes.BanMask].Match(details.nickMaskCasefolded) &&
 		!isInvited &&
 		!channel.lists[modes.ExceptMask].Match(details.nickMaskCasefolded) {
-		rb.Add(nil, client.server.name, ERR_BANNEDFROMCHAN, chname, fmt.Sprintf(client.t("Cannot join channel (+%s)"), "b"))
+		rb.Add(nil, client.server.name, ERR_BANNEDFROMCHAN, details.nick, chname, fmt.Sprintf(client.t("Cannot join channel (+%s)"), "b"))
 		return
 	}
 
@@ -482,7 +482,7 @@ func (channel *Channel) Join(client *Client, key string, isSajoin bool, rb *Resp
 func (channel *Channel) Part(client *Client, message string, rb *ResponseBuffer) {
 	chname := channel.Name()
 	if !channel.hasClient(client) {
-		rb.Add(nil, client.server.name, ERR_NOTONCHANNEL, chname, client.t("You're not on that channel"))
+		rb.Add(nil, client.server.name, ERR_NOTONCHANNEL, client.Nick(), chname, client.t("You're not on that channel"))
 		return
 	}
 
@@ -645,7 +645,7 @@ func (channel *Channel) replayHistoryItems(rb *ResponseBuffer, items []history.I
 // `sendNoTopic` controls whether RPL_NOTOPIC is sent when the topic is unset
 func (channel *Channel) SendTopic(client *Client, rb *ResponseBuffer, sendNoTopic bool) {
 	if !channel.hasClient(client) {
-		rb.Add(nil, client.server.name, ERR_NOTONCHANNEL, client.nick, channel.name, client.t("You're not on that channel"))
+		rb.Add(nil, client.server.name, ERR_NOTONCHANNEL, client.Nick(), channel.name, client.t("You're not on that channel"))
 		return
 	}
 
@@ -670,12 +670,12 @@ func (channel *Channel) SendTopic(client *Client, rb *ResponseBuffer, sendNoTopi
 // SetTopic sets the topic of this channel, if the client is allowed to do so.
 func (channel *Channel) SetTopic(client *Client, topic string, rb *ResponseBuffer) {
 	if !(client.HasMode(modes.Operator) || channel.hasClient(client)) {
-		rb.Add(nil, client.server.name, ERR_NOTONCHANNEL, channel.name, client.t("You're not on that channel"))
+		rb.Add(nil, client.server.name, ERR_NOTONCHANNEL, client.Nick(), channel.Name(), client.t("You're not on that channel"))
 		return
 	}
 
 	if channel.flags.HasMode(modes.OpOnlyTopic) && !channel.ClientIsAtLeast(client, modes.ChannelOperator) {
-		rb.Add(nil, client.server.name, ERR_CHANOPRIVSNEEDED, channel.name, client.t("You're not a channel operator"))
+		rb.Add(nil, client.server.name, ERR_CHANOPRIVSNEEDED, client.Nick(), channel.Name(), client.t("You're not a channel operator"))
 		return
 	}
 
@@ -719,22 +719,30 @@ func (channel *Channel) CanSpeak(client *Client) bool {
 	return true
 }
 
-func (channel *Channel) SendSplitMessage(command string, minPrefix *modes.Mode, clientOnlyTags map[string]string, client *Client, message utils.SplitMessage, rb *ResponseBuffer) {
-	var histType history.ItemType
+func msgCommandToHistType(server *Server, command string) (history.ItemType, error) {
 	switch command {
 	case "PRIVMSG":
-		histType = history.Privmsg
+		return history.Privmsg, nil
 	case "NOTICE":
-		histType = history.Notice
+		return history.Notice, nil
 	case "TAGMSG":
-		histType = history.Tagmsg
+		return history.Tagmsg, nil
 	default:
-		channel.server.logger.Error("internal", "unrecognized Channel.SendSplitMessage command", command)
+		server.logger.Error("internal", "unrecognized messaging command", command)
+		return history.ItemType(0), errInvalidParams
+	}
+}
+
+func (channel *Channel) SendSplitMessage(command string, minPrefix *modes.Mode, clientOnlyTags map[string]string, client *Client, message utils.SplitMessage, rb *ResponseBuffer) {
+	histType, err := msgCommandToHistType(channel.server, command)
+	if err != nil {
 		return
 	}
 
 	if !channel.CanSpeak(client) {
-		rb.Add(nil, client.server.name, ERR_CANNOTSENDTOCHAN, channel.name, client.t("Cannot send to channel"))
+		if histType != history.Notice {
+			rb.Add(nil, client.server.name, ERR_CANNOTSENDTOCHAN, client.Nick(), channel.Name(), client.t("Cannot send to channel"))
+		}
 		return
 	}
 
@@ -751,7 +759,7 @@ func (channel *Channel) SendSplitMessage(command string, minPrefix *modes.Mode,
 		}
 		nickMaskString := client.NickMaskString()
 		accountName := client.AccountName()
-		if command == "TAGMSG" && client.capabilities.Has(caps.MessageTags) {
+		if histType == history.Tagmsg && client.capabilities.Has(caps.MessageTags) {
 			rb.AddFromClient(message.Msgid, nickMaskString, accountName, tagsToUse, command, channel.name)
 		} else {
 			rb.AddSplitMessageFromClient(nickMaskString, accountName, tagsToUse, command, channel.name, message)
@@ -775,11 +783,11 @@ func (channel *Channel) SendSplitMessage(command string, minPrefix *modes.Mode,
 		var tagsToUse map[string]string
 		if member.capabilities.Has(caps.MessageTags) {
 			tagsToUse = clientOnlyTags
-		} else if command == "TAGMSG" {
+		} else if histType == history.Tagmsg {
 			continue
 		}
 
-		if command == "TAGMSG" {
+		if histType == history.Tagmsg {
 			member.sendFromClientInternal(false, now, message.Msgid, nickmask, account, tagsToUse, command, channel.name)
 		} else {
 			member.sendSplitMsgFromClientInternal(false, now, nickmask, account, tagsToUse, command, channel.name, message)
@@ -861,7 +869,7 @@ func (channel *Channel) applyModeMask(client *Client, mode modes.Mode, op modes.
 	}
 
 	if !channel.ClientIsAtLeast(client, modes.ChannelOperator) {
-		rb.Add(nil, client.server.name, ERR_CHANOPRIVSNEEDED, channel.name, client.t("You're not a channel operator"))
+		rb.Add(nil, client.server.name, ERR_CHANOPRIVSNEEDED, client.Nick(), channel.Name(), client.t("You're not a channel operator"))
 		return false
 	}
 
@@ -898,15 +906,15 @@ func (channel *Channel) Quit(client *Client) {
 
 func (channel *Channel) Kick(client *Client, target *Client, comment string, rb *ResponseBuffer) {
 	if !(client.HasMode(modes.Operator) || channel.hasClient(client)) {
-		rb.Add(nil, client.server.name, ERR_NOTONCHANNEL, channel.name, client.t("You're not on that channel"))
+		rb.Add(nil, client.server.name, ERR_NOTONCHANNEL, client.Nick(), channel.Name(), client.t("You're not on that channel"))
 		return
 	}
 	if !channel.hasClient(target) {
-		rb.Add(nil, client.server.name, ERR_USERNOTINCHANNEL, client.nick, channel.name, client.t("They aren't on that channel"))
+		rb.Add(nil, client.server.name, ERR_USERNOTINCHANNEL, client.Nick(), channel.Name(), client.t("They aren't on that channel"))
 		return
 	}
 	if !channel.ClientHasPrivsOver(client, target) {
-		rb.Add(nil, client.server.name, ERR_CHANOPRIVSNEEDED, channel.name, client.t("You don't have enough channel privileges"))
+		rb.Add(nil, client.server.name, ERR_CHANOPRIVSNEEDED, client.Nick(), channel.Name(), client.t("You don't have enough channel privileges"))
 		return
 	}
 
@@ -938,12 +946,12 @@ func (channel *Channel) Kick(client *Client, target *Client, comment string, rb
 func (channel *Channel) Invite(invitee *Client, inviter *Client, rb *ResponseBuffer) {
 	chname := channel.Name()
 	if channel.flags.HasMode(modes.InviteOnly) && !channel.ClientIsAtLeast(inviter, modes.ChannelOperator) {
-		rb.Add(nil, inviter.server.name, ERR_CHANOPRIVSNEEDED, chname, inviter.t("You're not a channel operator"))
+		rb.Add(nil, inviter.server.name, ERR_CHANOPRIVSNEEDED, inviter.Nick(), channel.Name(), inviter.t("You're not a channel operator"))
 		return
 	}
 
 	if !channel.hasClient(inviter) {
-		rb.Add(nil, inviter.server.name, ERR_NOTONCHANNEL, chname, inviter.t("You're not on that channel"))
+		rb.Add(nil, inviter.server.name, ERR_NOTONCHANNEL, inviter.Nick(), channel.Name(), inviter.t("You're not on that channel"))
 		return
 	}
 

irc/client.go

@@ -325,7 +325,7 @@ func (client *Client) run() {
 		if err == ircmsg.ErrorLineIsEmpty {
 			continue
 		} else if err == ircmsg.ErrorLineTooLong {
-			client.Send(nil, client.server.name, ERR_INPUTTOOLONG, client.nick, client.t("Input line too long"))
+			client.Send(nil, client.server.name, ERR_INPUTTOOLONG, client.Nick(), client.t("Input line too long"))
 			continue
 		} else if err != nil {
 			client.Quit(client.t("Received malformed line"))
@@ -335,9 +335,9 @@ func (client *Client) run() {
 		cmd, exists := Commands[msg.Command]
 		if !exists {
 			if len(msg.Command) > 0 {
-				client.Send(nil, client.server.name, ERR_UNKNOWNCOMMAND, client.nick, msg.Command, client.t("Unknown command"))
+				client.Send(nil, client.server.name, ERR_UNKNOWNCOMMAND, client.Nick(), msg.Command, client.t("Unknown command"))
 			} else {
-				client.Send(nil, client.server.name, ERR_UNKNOWNCOMMAND, client.nick, "lastcmd", client.t("No command given"))
+				client.Send(nil, client.server.name, ERR_UNKNOWNCOMMAND, client.Nick(), "lastcmd", client.t("No command given"))
 			}
 			continue
 		}

irc/commands.go

@@ -23,7 +23,7 @@ type Command struct {
 // Run runs this command with the given client/message.
 func (cmd *Command) Run(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
 	if !client.registered && !cmd.usablePreReg {
-		client.Send(nil, server.name, ERR_NOTREGISTERED, client.nick, client.t("You need to register before you can use that command"))
+		client.Send(nil, server.name, ERR_NOTREGISTERED, "*", client.t("You need to register before you can use that command"))
 		return false
 	}
 	if cmd.oper && !client.HasMode(modes.Operator) {
@@ -184,7 +184,7 @@ func init() {
 			minParams:    1,
 		},
 		"NOTICE": {
-			handler:   noticeHandler,
+			handler:   messageHandler,
 			minParams: 2,
 		},
 		"NPC": {
@@ -221,7 +221,7 @@ func init() {
 			leaveClientIdle: true,
 		},
 		"PRIVMSG": {
-			handler:   privmsgHandler,
+			handler:   messageHandler,
 			minParams: 2,
 		},
 		"RENAME": {
@@ -257,7 +257,7 @@ func init() {
 			minParams: 1,
 		},
 		"TAGMSG": {
-			handler:   tagmsgHandler,
+			handler:   messageHandler,
 			minParams: 1,
 		},
 		"QUIT": {

irc/handlers.go

@@ -242,7 +242,7 @@ func accVerifyHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb
 	if err == nil {
 		sendSuccessfulRegResponse(client, rb, false)
 	} else {
-		rb.Add(nil, server.name, code, client.nick, account, client.t(message))
+		rb.Add(nil, server.name, code, client.Nick(), account, client.t(message))
 	}
 
 	return false
@@ -1873,17 +1873,38 @@ func nickHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *Resp
 }
 
 // NOTICE <target>{,<target>} <message>
-func noticeHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
+// PRIVMSG <target>{,<target>} <message>
+// TAGMSG <target>{,<target>}
+func messageHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
+	histType, err := msgCommandToHistType(server, msg.Command)
+	if err != nil {
+		return false
+	}
+
+	cnick := client.Nick()
 	clientOnlyTags := msg.ClientOnlyTags()
+	if histType == history.Tagmsg && len(clientOnlyTags) == 0 {
+		// nothing to do
+		return false
+	}
+
 	targets := strings.Split(msg.Params[0], ",")
-	message := msg.Params[1]
+	var message string
+	if len(msg.Params) > 1 {
+		message = msg.Params[1]
+	}
+
+	// note that error replies are never sent for NOTICE
 
 	if client.isTor && isRestrictedCTCPMessage(message) {
-		rb.Add(nil, server.name, "NOTICE", client.t("CTCP messages are disabled over Tor"))
+		if histType != history.Notice {
+			rb.Add(nil, server.name, "NOTICE", client.t("CTCP messages are disabled over Tor"))
+		}
 		return false
 	}
 
 	splitMsg := utils.MakeSplitMessage(message, !client.capabilities.Has(caps.MaxLine))
+	now := time.Now().UTC()
 
 	for i, targetString := range targets {
 		// max of four targets per privmsg
@@ -1893,52 +1914,66 @@ func noticeHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *Re
 		prefixes, targetString := modes.SplitChannelMembershipPrefixes(targetString)
 		lowestPrefix := modes.GetLowestChannelModePrefix(prefixes)
 
-		target, cerr := CasefoldChannel(targetString)
-		if cerr == nil {
-			channel := server.channels.Get(target)
+		if len(targetString) == 0 {
+			continue
+		} else if targetString[0] == '#' {
+			channel := server.channels.Get(targetString)
 			if channel == nil {
-				// errors silently ignored with NOTICE as per RFC
-				continue
-			}
-			if !channel.CanSpeak(client) {
-				// errors silently ignored with NOTICE as per RFC
+				if histType != history.Notice {
+					rb.Add(nil, server.name, ERR_NOSUCHCHANNEL, cnick, targetString, client.t("No such channel"))
+				}
 				continue
 			}
-			channel.SendSplitMessage("NOTICE", lowestPrefix, clientOnlyTags, client, splitMsg, rb)
+			channel.SendSplitMessage(msg.Command, lowestPrefix, clientOnlyTags, client, splitMsg, rb)
 		} else {
-			target, err := CasefoldName(targetString)
-			if err != nil {
-				continue
-			}
-
-			// NOTICEs sent to services are ignored
-			if _, isService := OragonoServices[target]; isService {
+			if service, isService := OragonoServices[strings.ToLower(targetString)]; isService {
+				// NOTICE and TAGMSG to services are ignored
+				if histType == history.Privmsg {
+					servicePrivmsgHandler(service, server, client, message, rb)
+				}
 				continue
 			}
 
-			user := server.clients.Get(target)
+			user := server.clients.Get(targetString)
 			if user == nil {
-				// errors silently ignored with NOTICE as per RFC
+				if histType != history.Notice {
+					rb.Add(nil, server.name, ERR_NOSUCHNICK, cnick, targetString, "No such nick")
+				}
 				continue
 			}
-			if !user.capabilities.Has(caps.MessageTags) {
-				clientOnlyTags = nil
+			tnick := user.Nick()
+
+			if histType == history.Tagmsg && !user.capabilities.Has(caps.MessageTags) {
+				continue // nothing to do
 			}
+
+			nickMaskString := client.NickMaskString()
+			accountName := client.AccountName()
 			// restrict messages appropriately when +R is set
 			// intentionally make the sending user think the message went through fine
 			allowedPlusR := !user.HasMode(modes.RegisteredOnly) || client.LoggedIntoAccount()
 			allowedTor := !user.isTor || !isRestrictedCTCPMessage(message)
 			if allowedPlusR && allowedTor {
-				user.SendSplitMsgFromClient(client, clientOnlyTags, "NOTICE", user.nick, splitMsg)
+				if histType == history.Tagmsg {
+					user.sendFromClientInternal(false, now, splitMsg.Msgid, nickMaskString, accountName, clientOnlyTags, msg.Command, tnick)
+				} else {
+					user.SendSplitMsgFromClient(client, clientOnlyTags, msg.Command, tnick, splitMsg)
+				}
 			}
-			nickMaskString := client.NickMaskString()
-			accountName := client.AccountName()
 			if client.capabilities.Has(caps.EchoMessage) {
-				rb.AddSplitMessageFromClient(nickMaskString, accountName, clientOnlyTags, "NOTICE", user.nick, splitMsg)
+				if histType == history.Tagmsg && client.capabilities.Has(caps.MessageTags) {
+					rb.AddFromClient(splitMsg.Msgid, nickMaskString, accountName, clientOnlyTags, msg.Command, tnick)
+				} else {
+					rb.AddSplitMessageFromClient(nickMaskString, accountName, clientOnlyTags, msg.Command, tnick, splitMsg)
+				}
+			}
+			if histType != history.Notice && user.HasMode(modes.Away) {
+				//TODO(dan): possibly implement cooldown of away notifications to users
+				rb.Add(nil, server.name, RPL_AWAY, cnick, tnick, user.AwayMessage())
 			}
 
 			user.history.Add(history.Item{
-				Type:        history.Notice,
+				Type:        histType,
 				Message:     splitMsg,
 				Nick:        nickMaskString,
 				AccountName: accountName,
@@ -1988,7 +2023,7 @@ func npcaHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *Resp
 // OPER <name> <password>
 func operHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
 	if client.HasMode(modes.Operator) == true {
-		rb.Add(nil, server.name, ERR_UNKNOWNERROR, "OPER", client.t("You're already opered-up!"))
+		rb.Add(nil, server.name, ERR_UNKNOWNERROR, client.Nick(), "OPER", client.t("You're already opered-up!"))
 		return false
 	}
 
@@ -1999,7 +2034,7 @@ func operHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *Resp
 		authorized = (bcrypt.CompareHashAndPassword(oper.Pass, password) == nil)
 	}
 	if !authorized {
-		rb.Add(nil, server.name, ERR_PASSWDMISMATCH, client.nick, client.t("Password incorrect"))
+		rb.Add(nil, server.name, ERR_PASSWDMISMATCH, client.Nick(), client.t("Password incorrect"))
 		client.Quit(client.t("Password incorrect"))
 		return true
 	}
@@ -2090,90 +2125,6 @@ func isRestrictedCTCPMessage(message string) bool {
 	return strings.HasPrefix(message, "\x01") && !strings.HasPrefix(message, "\x01ACTION")
 }
 
-// PRIVMSG <target>{,<target>} <message>
-func privmsgHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
-	clientOnlyTags := msg.ClientOnlyTags()
-	targets := strings.Split(msg.Params[0], ",")
-	message := msg.Params[1]
-
-	if client.isTor && isRestrictedCTCPMessage(message) {
-		rb.Add(nil, server.name, "NOTICE", client.t("CTCP messages are disabled over Tor"))
-		return false
-	}
-
-	// split privmsg
-	splitMsg := utils.MakeSplitMessage(message, !client.capabilities.Has(caps.MaxLine))
-
-	cnick := client.Nick()
-	for i, targetString := range targets {
-		// max of four targets per privmsg
-		if i > maxTargets-1 {
-			break
-		}
-		prefixes, targetString := modes.SplitChannelMembershipPrefixes(targetString)
-		lowestPrefix := modes.GetLowestChannelModePrefix(prefixes)
-
-		// eh, no need to notify them
-		if len(targetString) < 1 {
-			continue
-		}
-
-		target, err := CasefoldChannel(targetString)
-		if err == nil {
-			channel := server.channels.Get(target)
-			if channel == nil {
-				rb.Add(nil, server.name, ERR_NOSUCHCHANNEL, cnick, targetString, client.t("No such channel"))
-				continue
-			}
-			if !channel.CanSpeak(client) {
-				rb.Add(nil, client.server.name, ERR_CANNOTSENDTOCHAN, channel.name, client.t("Cannot send to channel"))
-				continue
-			}
-			channel.SendSplitMessage("PRIVMSG", lowestPrefix, clientOnlyTags, client, splitMsg, rb)
-		} else {
-			target, err = CasefoldName(targetString)
-			if service, isService := OragonoServices[target]; isService {
-				servicePrivmsgHandler(service, server, client, message, rb)
-				continue
-			}
-			user := server.clients.Get(target)
-			if err != nil || user == nil {
-				if len(target) > 0 {
-					client.Send(nil, server.name, ERR_NOSUCHNICK, cnick, target, "No such nick")
-				}
-				continue
-			}
-			if !user.capabilities.Has(caps.MessageTags) {
-				clientOnlyTags = nil
-			}
-			// restrict messages appropriately when +R is set
-			// intentionally make the sending user think the message went through fine
-			allowedPlusR := !user.HasMode(modes.RegisteredOnly) || client.LoggedIntoAccount()
-			allowedTor := !user.isTor || !isRestrictedCTCPMessage(message)
-			if allowedPlusR && allowedTor {
-				user.SendSplitMsgFromClient(client, clientOnlyTags, "PRIVMSG", user.nick, splitMsg)
-			}
-			nickMaskString := client.NickMaskString()
-			accountName := client.AccountName()
-			if client.capabilities.Has(caps.EchoMessage) {
-				rb.AddSplitMessageFromClient(nickMaskString, accountName, clientOnlyTags, "PRIVMSG", user.nick, splitMsg)
-			}
-			if user.HasMode(modes.Away) {
-				//TODO(dan): possibly implement cooldown of away notifications to users
-				rb.Add(nil, server.name, RPL_AWAY, cnick, user.Nick(), user.AwayMessage())
-			}
-
-			user.history.Add(history.Item{
-				Type:        history.Privmsg,
-				Message:     splitMsg,
-				Nick:        nickMaskString,
-				AccountName: accountName,
-			})
-		}
-	}
-	return false
-}
-
 // QUIT [<reason>]
 func quitHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
 	reason := "Quit"
@@ -2346,71 +2297,6 @@ func setnameHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *R
 	return false
 }
 
-// TAGMSG <target>{,<target>}
-func tagmsgHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
-	clientOnlyTags := msg.ClientOnlyTags()
-	// no client-only tags, so we can drop it
-	if clientOnlyTags == nil {
-		return false
-	}
-
-	targets := strings.Split(msg.Params[0], ",")
-
-	cnick := client.Nick()
-	message := utils.MakeSplitMessage("", true) // assign consistent message ID
-	for i, targetString := range targets {
-		// max of four targets per privmsg
-		if i > maxTargets-1 {
-			break
-		}
-		prefixes, targetString := modes.SplitChannelMembershipPrefixes(targetString)
-		lowestPrefix := modes.GetLowestChannelModePrefix(prefixes)
-
-		// eh, no need to notify them
-		if len(targetString) < 1 {
-			continue
-		}
-
-		target, err := CasefoldChannel(targetString)
-		if err == nil {
-			channel := server.channels.Get(target)
-			if channel == nil {
-				rb.Add(nil, server.name, ERR_NOSUCHCHANNEL, cnick, targetString, client.t("No such channel"))
-				continue
-			}
-			if !channel.CanSpeak(client) {
-				rb.Add(nil, client.server.name, ERR_CANNOTSENDTOCHAN, channel.name, client.t("Cannot send to channel"))
-				continue
-			}
-			channel.SendSplitMessage("TAGMSG", lowestPrefix, clientOnlyTags, client, message, rb)
-		} else {
-			target, err = CasefoldName(targetString)
-			user := server.clients.Get(target)
-			if err != nil || user == nil {
-				if len(target) > 0 {
-					client.Send(nil, server.name, ERR_NOSUCHNICK, cnick, target, client.t("No such nick"))
-				}
-				continue
-			}
-
-			// end user can't receive tagmsgs
-			if !user.capabilities.Has(caps.MessageTags) {
-				continue
-			}
-			unick := user.Nick()
-			user.SendSplitMsgFromClient(client, clientOnlyTags, "TAGMSG", unick, message)
-			if client.capabilities.Has(caps.EchoMessage) {
-				rb.AddSplitMessageFromClient(client.NickMaskString(), client.AccountName(), clientOnlyTags, "TAGMSG", unick, message)
-			}
-			if user.HasMode(modes.Away) {
-				//TODO(dan): possibly implement cooldown of away notifications to users
-				rb.Add(nil, server.name, RPL_AWAY, cnick, unick, user.AwayMessage())
-			}
-		}
-	}
-	return false
-}
-
 // TIME
 func timeHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
 	rb.Add(nil, server.name, RPL_TIME, client.nick, server.name, time.Now().Format(time.RFC1123))
@@ -2502,7 +2388,7 @@ func unKLineHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *R
 // USER <username> * 0 <realname>
 func userHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
 	if client.registered {
-		rb.Add(nil, server.name, ERR_ALREADYREGISTRED, client.nick, client.t("You may not reregister"))
+		rb.Add(nil, server.name, ERR_ALREADYREGISTRED, client.Nick(), client.t("You may not reregister"))
 		return false
 	}
 
@@ -2513,7 +2399,7 @@ func userHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *Resp
 		if client.preregNick == msg.Params[0] {
 			client.SetNames("user", msg.Params[3], false)
 		} else {
-			rb.Add(nil, server.name, ERR_INVALIDUSERNAME, client.t("Malformed username"))
+			rb.Add(nil, server.name, ERR_INVALIDUSERNAME, client.Nick(), client.t("Malformed username"))
 		}
 	}
 
@@ -2631,7 +2517,7 @@ func whoHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *Respo
 	if len(msg.Params) > 0 {
 		casefoldedMask, err := Casefold(msg.Params[0])
 		if err != nil {
-			rb.Add(nil, server.name, ERR_UNKNOWNERROR, "WHO", client.t("Mask isn't valid"))
+			rb.Add(nil, server.name, ERR_UNKNOWNERROR, client.Nick(), "WHO", client.t("Mask isn't valid"))
 			return false
 		}
 		mask = casefoldedMask

irc/modes.go

@@ -150,7 +150,7 @@ func (channel *Channel) ApplyChannelModeChanges(client *Client, isSamode bool, c
 		if !hasPrivs(change) {
 			if !alreadySentPrivError {
 				alreadySentPrivError = true
-				rb.Add(nil, client.server.name, ERR_CHANOPRIVSNEEDED, channel.name, client.t("You're not a channel operator"))
+				rb.Add(nil, client.server.name, ERR_CHANOPRIVSNEEDED, client.Nick(), channel.name, client.t("You're not a channel operator"))
 			}
 			continue
 		}
@@ -226,7 +226,7 @@ func (channel *Channel) ApplyChannelModeChanges(client *Client, isSamode bool, c
 
 			nick := change.Arg
 			if nick == "" {
-				rb.Add(nil, client.server.name, ERR_NEEDMOREPARAMS, "MODE", client.t("Not enough parameters"))
+				rb.Add(nil, client.server.name, ERR_NEEDMOREPARAMS, client.Nick(), "MODE", client.t("Not enough parameters"))
 				return nil
 			}
 

irc/nickname.go

@@ -26,14 +26,15 @@ var (
 func performNickChange(server *Server, client *Client, target *Client, newnick string, rb *ResponseBuffer) bool {
 	nickname := strings.TrimSpace(newnick)
 	cfnick, err := CasefoldName(nickname)
+	currentNick := client.Nick()
 
 	if len(nickname) < 1 {
-		rb.Add(nil, server.name, ERR_NONICKNAMEGIVEN, client.nick, client.t("No nickname given"))
+		rb.Add(nil, server.name, ERR_NONICKNAMEGIVEN, currentNick, 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"))
+		rb.Add(nil, server.name, ERR_ERRONEUSNICKNAME, currentNick, nickname, client.t("Erroneous nickname"))
 		return false
 	}
 
@@ -46,13 +47,13 @@ func performNickChange(server *Server, client *Client, target *Client, newnick s
 	whowas := client.WhoWas()
 	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"))
+		rb.Add(nil, server.name, ERR_NICKNAMEINUSE, currentNick, 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"))
+		rb.Add(nil, server.name, ERR_NICKNAMEINUSE, currentNick, 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()))
+		rb.Add(nil, server.name, ERR_UNKNOWNERROR, currentNick, "NICK", fmt.Sprintf(client.t("Could not set or change nickname: %s"), err.Error()))
 		return false
 	}