irc/commands.go

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package irc
import (
"fmt"
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"regexp"
"strconv"
"strings"
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"time"
"github.com/sorcix/irc"
)
// CommandHandler allows objects implementing this interface to be registered to serve a particular IRC command
type CommandHandler interface {
ServeIRC(message *irc.Message, client *Client)
}
// CommandHandlerFunc is a wrapper to to use regular functions as a CommandHandler
type CommandHandlerFunc func(message *irc.Message, client *Client)
// ServeIRC services a given IRC message from the given client
func (f CommandHandlerFunc) ServeIRC(message *irc.Message, client *Client) {
f(message, client)
}
// PingHandler is a CommandHandler to respond to IRC PING commands from a client
// Implemented according to RFC 1459 Section 4.6.2 and RFC 2812 Section 3.7.2
func PingHandler(message *irc.Message, client *Client) {
client.Pong()
}
// PongHandler is a CommandHandler to respond to IRC PONG commands from a client
// Implemented according to RFC 1459 Section 4.6.3 and RFC 2812 Section 3.7.3
func PongHandler(message *irc.Message, client *Client) {
//client.Ping()
}
// QuitHandler is a CommandHandler to respond to IRC QUIT commands from a client
// Implemented according to RFC 1459 Section 4.1.6 and RFC 2812 Section 3.1.7
func QuitHandler(message *irc.Message, client *Client) {
var leavingMessage string
if len(message.Params) != 0 {
leavingMessage = message.Params[0]
} else if len(message.Trailing) != 0 {
leavingMessage = message.Trailing
} else {
leavingMessage = client.Nickname
}
for _, channel := range client.GetChannels() {
channel.Quit(client, leavingMessage)
}
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERROR, Trailing: "quit"}
client.Encode(&m)
client.Close()
}
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// PassHandler is a CommandHandler to respond to IRC PASS commands from a client
// Implemented according to RFC 1459 Section 4.1.1 and RFC 2812 Section 3.1.1
func PassHandler(message *irc.Message, client *Client) {
if len(message.Params) == 0 {
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NEEDMOREPARAMS, Trailing: "No nickname given"}
client.Encode(&m)
return
}
if len(client.Nickname) != 0 || len(client.Username) != 0 {
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_ALREADYREGISTRED, Trailing: "Unauthorized command (already registered)"}
client.Encode(&m)
return
}
client.authorized = message.Params[0] == client.Server.Config.Password
}
// NickHandler is a CommandHandler to respond to IRC NICK commands from a client
// Implemented according to RFC 1459 Section 4.1.2 and RFC 2812 Section 3.1.2
func NickHandler(message *irc.Message, client *Client) {
var m irc.Message
//nickname := client.Nickname
if len(message.Params) == 0 {
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m = irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NONICKNAMEGIVEN, Trailing: "No nickname given"}
client.Encode(&m)
return
}
newNickname := message.Params[0]
_, found := client.Server.GetClientByNick(newNickname)
switch {
case !client.authorized:
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m = irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_PASSWDMISMATCH, Params: []string{newNickname}, Trailing: "Password incorrect"}
case found: // nickname already in use
fmt.Println("Nickname already used")
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m = irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NICKNAMEINUSE, Params: []string{newNickname}, Trailing: "Nickname is already in use"}
default:
if len(client.Nickname) == 0 && len(client.Username) != 0 { // Client is connected now, show MOTD ...
client.Nickname = newNickname
client.Server.AddClientNick(client)
client.Welcome()
} else if len(client.Username) != 0 { //change client name
client.UpdateNick(newNickname)
//fmt.Println("Updating client name")
} else {
client.Nickname = newNickname
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client.Server.UpdateClientNick(client, newNickname)
}
}
if len(m.Command) != 0 {
client.Encode(&m)
}
}
// UserHandler is a CommandHandler to respond to IRC USER commands from a client
// Implemented according to RFC 1459 Section 4.1.3 and RFC 2812 Section 3.1.3
func UserHandler(message *irc.Message, client *Client) {
var m irc.Message
//nickname := client.Nickname
if len(client.Username) != 0 { // Already registered
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m = irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_ALREADYREGISTRED, Trailing: "You may not reregister"}
client.Encode(&m)
return
}
if len(message.Params) != 3 {
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m = irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NEEDMOREPARAMS, Trailing: "Not enough parameters"}
client.Encode(&m)
return
}
name := message.Params[0]
username := message.Params[1]
hostname := message.Params[2]
realName := message.Trailing
client.Name = name
client.Username = username
client.Host = hostname
client.RealName = realName
if len(m.Command) == 0 && len(client.Nickname) != 0 { // Client has finished connecting
client.Welcome()
return
}
if len(m.Command) != 0 {
client.Encode(&m)
}
}
// JoinHandler is a CommandHandler to respond to IRC JOIN commands from a client
// Implemented according to RFC 1459 Section 4.2.1 and RFC 2812 Section 3.2.1
func JoinHandler(message *irc.Message, client *Client) {
channelNames := message.Params[0]
if channelNames == "0" { // Leave all channels
for _, channel := range client.GetChannels() {
channel.Part(client, "")
}
return
}
channelList := strings.Split(channelNames, ",")
keys := ""
if len(message.Params) >= 2 {
keys = message.Params[1]
}
keyList := strings.Split(keys, ",")
for i, cName := range channelList {
var key string
if len(keyList) > i {
key = keyList[i]
}
channel, ok := client.Server.GetChannel(cName)
if !ok { // Channel doesn't exist yet
channel = NewChannel(client.Server, client)
channel.Name = cName
//channel.Members[client.Nickname] = client.Nickname
channel.Key = key
client.Server.AddChannel(channel)
} else { //Channel already exists
}
//Notify channel members of new member
channel.Join(client, key)
}
}
// PartHandler is a CommandHandler to respond to IRC PART commands from a client
// Implemented according to RFC 1459 Section 4.2.2 and RFC 2812 Section 3.2.2
func PartHandler(message *irc.Message, client *Client) {
if len(message.Params) == 0 {
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NEEDMOREPARAMS, Trailing: "Not enough parameters"}
client.Encode(&m)
return
}
for _, cName := range message.Params {
channel, ok := client.Server.GetChannel(cName)
if !ok { // Channel doesn't exist yet
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NOSUCHCHANNEL, Trailing: "You're not on that channel"}
client.Encode(&m)
continue
} else { //Channel already exists
}
channel.Part(client, message.Trailing)
}
}
// PrivMsgHandler is a CommandHandler to respond to IRC PRIVMSG commands from a client
// Implemented according to RFC 1459 Section 4.4.1 and RFC 2812 Section 3.3.1
func PrivMsgHandler(message *irc.Message, client *Client) {
if len(message.Params) == 0 {
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NORECIPIENT, Params: []string{client.Nickname}, Trailing: "No recipient given (PRIVMSG)"}
client.Encode(&m)
return
}
if len(message.Params) > 1 {
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_TOOMANYTARGETS, Params: []string{client.Nickname}}
client.Encode(&m)
return
}
if len(message.Trailing) == 0 {
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NOTEXTTOSEND, Params: []string{client.Nickname}, Trailing: "No text to send"}
client.Encode(&m)
return
}
to := message.Params[0]
ch, ok := client.Server.GetChannel(to)
if ok { // message is to a channel
ch.Message(client, message.Trailing)
return
}
// message to a user?
cl, ok := client.Server.GetClientByNick(to)
if ok {
m := irc.Message{Prefix: client.Prefix, Command: irc.PRIVMSG, Params: []string{cl.Nickname}, Trailing: message.Trailing}
cl.Encode(&m)
if cl.HasMode(UserModeAway) {
m := irc.Message{Prefix: cl.Server.Prefix, Command: irc.RPL_AWAY, Params: []string{client.Nickname, cl.Nickname}, Trailing: cl.AwayMessage}
client.Encode(&m)
}
return
}
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NOSUCHNICK, Params: []string{client.Nickname}, Trailing: "No recipient given (PRIVMSG)"}
client.Encode(&m)
}
// NoticeHandler is a CommandHandler to respond to IRC NOTICE commands from a client
// Implemented according to RFC 1459 Section 4.4.2 and RFC 2812 Section 3.3.2
func NoticeHandler(message *irc.Message, client *Client) {
if len(message.Params) == 0 {
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NORECIPIENT, Params: []string{client.Nickname}, Trailing: "No recipient given (PRIVMSG)"}
client.Encode(&m)
return
}
if len(message.Params) > 1 {
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_TOOMANYTARGETS, Params: []string{client.Nickname}}
client.Encode(&m)
return
}
if len(message.Trailing) == 0 {
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NOTEXTTOSEND, Params: []string{client.Nickname}, Trailing: "No text to send"}
client.Encode(&m)
return
}
to := message.Params[0]
ch, ok := client.Server.GetChannel(to)
if ok { // message is to a channel
ch.Notice(client, message.Trailing)
return
}
// message to a user?
cl, ok := client.Server.GetClientByNick(to)
if ok {
m := irc.Message{Prefix: client.Prefix, Command: irc.NOTICE, Params: []string{cl.Nickname}, Trailing: message.Trailing}
cl.Encode(&m)
return
}
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NOSUCHNICK, Params: []string{client.Nickname}, Trailing: "No recipient given (PRIVMSG)"}
client.Encode(&m)
}
// WhoHandler is a CommandHandler to respond to IRC WHO commands from a client
// Implemented according to RFC 1459 Section 4.5.1 and RFC 2812 Section 3.6.1
func WhoHandler(message *irc.Message, client *Client) {
if len(message.Params) == 0 || len(message.Params[0]) == 0 || message.Params[0][0] == '*' {
//return listing of all visible users - visible people and people in channels with this client
client.Who()
return
}
ch, ok := client.Server.GetChannel(message.Params[0])
if ok { //Channel exists
for clientName := range ch.members {
cl, found := client.Server.GetClientByNick(clientName)
if found && !client.HasMode(UserModeInvisible) {
msg := whoLine(cl, ch, client.Nickname)
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.RPL_WHOREPLY, Params: strings.Fields(msg)}
client.Encode(&m)
}
}
} else {
// Not a channel, maybe a user
cl, ok := client.Server.GetClientByNick(message.Params[0])
if ok {
msg := whoLine(cl, nil, client.Nickname)
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.RPL_WHOREPLY, Params: strings.Fields(msg)}
client.Encode(&m)
}
}
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.RPL_ENDOFWHO, Params: []string{client.Nickname, message.Params[0]}, Trailing: "End of WHO list"}
client.Encode(&m)
}
func whoLine(client *Client, channel *Channel, recipientClient string) string {
channelName := "*"
here := "H"
if client.UserModeSet.HasMode(UserModeAway) {
here = "G"
}
opStatus := ""
if client.HasMode(UserModeOperator) || client.HasMode(UserModeLocalOperator) {
opStatus += "*"
}
if channel != nil {
channelName = channel.Name
if channel.MemberHasMode(client, ChannelModeOperator) {
opStatus += "@"
}
}
hopCount := 0 //For now only local clients allowed - no federation
return fmt.Sprintf("%s %s %s %s %s %s %s%s :%d %s", recipientClient, channelName, client.Name, client.Host, client.Server.Config.Name, client.Nickname, here, opStatus, hopCount, client.RealName)
}
// TopicHandler is a CommandHandler to respond to IRC TOPIC commands from a client
// Implemented according to RFC 1459 Section 4.2.4 and RFC 2812 Section 3.2.4
func TopicHandler(message *irc.Message, client *Client) {
if len(message.Params) == 0 {
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NEEDMOREPARAMS, Params: []string{client.Nickname}, Trailing: "Not enough parameters"}
client.Encode(&m)
return
}
channelName := message.Params[0]
channel, ok := client.Server.GetChannel(channelName)
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if !ok || channel.HasMode(ChannelModeSecret) {
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NOSUCHCHANNEL, Params: []string{client.Nickname, channelName}, Trailing: "No such channel"}
client.Encode(&m)
return
}
m := ""
if len(message.Params) > 1 {
m = message.Params[1]
} else {
m = message.Trailing
}
channel.TopicCommand(client, m)
}
// AwayHandler is a CommandHandler to respond to IRC AWAY commands from a client
// Implemented according to RFC 1459 Section 5.1 and RFC 2812 Section 4.1
func AwayHandler(message *irc.Message, client *Client) {
if len(message.Params) == 0 && len(message.Trailing) == 0 {
client.AwayMessage = ""
client.RemoveMode(UserModeAway)
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.RPL_UNAWAY, Params: []string{client.Nickname}, Trailing: "You are no longer marked as being away"}
client.Encode(&m)
return
}
if len(message.Trailing) > 0 {
client.AwayMessage = message.Trailing
} else {
client.AwayMessage = strings.Join(message.Params, " ")
}
client.AddMode(UserModeAway)
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.RPL_NOWAWAY, Params: []string{client.Nickname}, Trailing: "You have been marked as being away"}
client.Encode(&m)
return
}
// ModeHandler is a CommandHandler to respond to IRC MODE commands from a client
// Implemented according to RFC 1459 Section 4.2.3 and RFC 2812 Section 3.1.5 and RFC 2811
func ModeHandler(message *irc.Message, client *Client) {
if len(message.Params) == 0 {
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NEEDMOREPARAMS, Params: []string{client.Nickname}, Trailing: "Not enough parameters"}
client.Encode(&m)
return
}
id := message.Params[0]
_, ok := client.Server.GetChannel(id)
if ok {
ChannelModeHandler(message, client)
return
}
UserModeHandler(message, client)
}
// UserModeHandler is a specialized CommandHandler to respond to global or user IRC MODE commands from a client
// Implemented according to RFC 1459 Section 4.2.3.2 and RFC 2812 Section 3.1.5
func UserModeHandler(message *irc.Message, client *Client) {
if len(message.Params) == 0 {
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NEEDMOREPARAMS, Params: []string{client.Nickname}, Trailing: "Not enough parameters"}
client.Encode(&m)
return
}
username := message.Params[0]
if username != client.Nickname {
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_USERSDONTMATCH, Params: []string{client.Nickname}, Trailing: "Cannot change mode for other users"}
client.Encode(&m)
return
}
if len(message.Params) == 1 { // just nickname is provided
// return current settings for this user
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.RPL_UMODEIS, Params: []string{client.Nickname, client.UserModeSet.String()}}
client.Encode(&m)
return
}
for _, modeFlags := range message.Params[1:] {
modifier := ModeModifier(modeFlags[0])
switch modifier {
case ModeModifierAdd:
case ModeModifierRemove:
default:
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_UMODEUNKNOWNFLAG, Params: []string{client.Nickname}, Trailing: "Unknown MODE flag"}
client.Encode(&m)
return
}
for _, modeFlag := range modeFlags[1:] {
mode := UserMode(modeFlag)
_, ok := UserModes[mode]
if !ok || mode == UserModeAway { // Away flag should only be set with AWAY command
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_UMODEUNKNOWNFLAG, Params: []string{client.Nickname}, Trailing: "Unknown MODE flag"}
client.Encode(&m)
return
}
if modifier == ModeModifierAdd {
switch mode {
case UserModeOperator, UserModeLocalOperator: // Can't make oneself an operator
default:
client.AddMode(mode)
}
} else if modifier == ModeModifierRemove {
switch mode {
case UserModeRestricted: // Can't remove oneself from being restricted
default:
client.RemoveMode(mode)
}
}
}
}
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.RPL_UMODEIS, Params: []string{client.Nickname, client.UserModeSet.String()}}
client.Encode(&m)
return
}
// ChannelModeHandler is a specialized CommandHandler to respond to channel IRC MODE commands from a client
// Implemented according to RFC 1459 Section 4.2.3.1 and RFC 2811
func ChannelModeHandler(message *irc.Message, client *Client) {
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if len(message.Params) == 0 {
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NEEDMOREPARAMS, Trailing: "Not enough parameters"}
client.Encode(&m)
return
}
channelName := message.Params[0]
channel, ok := client.Server.GetChannel(channelName)
if !ok {
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NOSUCHCHANNEL, Trailing: "No such channel"}
client.Encode(&m)
return
}
if len(message.Params) == 1 { // just channel name is provided
// return current settings for this channel
modes := channel.ChannelModeSet.Copy()
if !channel.HasMember(client) { // only current members should see the channel key
modes.SetKey("")
}
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.RPL_CHANNELMODEIS, Params: []string{client.Nickname, channel.Name, modes.String()}}
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client.Encode(&m)
return
}
if !channel.MemberHasMode(client, ChannelModeOperator) { // Only channel operators can make these changes
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_CHANOPRIVSNEEDED, Params: []string{client.Nickname, channel.Name}, Trailing: "You're not channel operator"}
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client.Encode(&m)
return
}
type fullFlag struct {
ModeModifier
ChannelMode
Param string
}
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needsArgs := []fullFlag{}
changes := []fullFlag{}
argsCount := 0
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for _, param := range message.Params[1:] {
if len(needsArgs) != 0 { // This param will be an arg
mode := needsArgs[0]
needsArgs = needsArgs[1:]
argsCount++
if argsCount > 3 { //Only allow 3 argument based flags per mode command
needsArgs = []fullFlag{}
break
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}
mode.Param = param
switch mode.ChannelMode {
case ChannelModeOperator, ChannelModeVoice:
n, ok := client.Server.GetClientByNick(param)
if ok {
found := channel.MemberHasMode(client, mode.ChannelMode)
if mode.ModeModifier == ModeModifierAdd {
channel.AddMemberMode(n, mode.ChannelMode)
if !found {
changes = append(changes, mode)
}
} else {
channel.RemoveMemberMode(n, mode.ChannelMode)
if found {
changes = append(changes, mode)
}
}
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}
case ChannelModeLimit:
l, err := strconv.Atoi(param)
if err == nil {
channel.SetLimit(l)
changes = append(changes, mode)
}
case ChannelModeKey:
channel.SetKey(param)
changes = append(changes, mode)
case ChannelModeBan, ChannelModeExceptionMask, ChannelModeInvitationMask:
fillMask := func(mask string) string {
p := irc.ParsePrefix(param)
if len(p.Name) == 0 {
p.Name = "*"
}
if len(p.User) == 0 {
p.User = "*"
}
if len(p.Host) == 0 {
p.Host = "*"
}
return p.String()
}
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mask := fillMask(param)
switch mode.ChannelMode {
case ChannelModeBan:
masks := channel.GetBanMasks()
_, ok := masks[mask]
if !ok {
channel.AddBanMask(mask)
mode.Param = mask
changes = append(changes, mode)
}
case ChannelModeExceptionMask:
masks := channel.GetExceptionMasks()
_, ok := masks[mask]
if !ok {
channel.AddExceptionMask(mask)
mode.Param = mask
changes = append(changes, mode)
}
case ChannelModeInvitationMask:
masks := channel.GetInvitationMasks()
_, ok := masks[mask]
if !ok {
channel.AddInvitationMask(mask)
mode.Param = mask
changes = append(changes, mode)
}
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}
}
} else { // This should be a mode flag or series of mode flags
modifier := ModeModifierAdd
for _, char := range param {
mod := ModeModifier(char)
switch mod { // Set if flag is adding a removing a mode
case ModeModifierAdd:
modifier = ModeModifierAdd
continue
case ModeModifierRemove:
modifier = ModeModifierRemove
continue
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}
flag := ChannelMode(char)
switch flag {
case ChannelModeVoice, ChannelModeOperator, ChannelModeExceptionMask, ChannelModeInvitationMask, ChannelModeBan, ChannelModeLimit:
needsArgs = append(needsArgs, fullFlag{modifier, flag, ""})
case ChannelModeKey:
if modifier == ModeModifierAdd {
needsArgs = append(needsArgs, fullFlag{modifier, flag, ""})
}
case ChannelModeAnonymous, ChannelModeInviteOnly, ChannelModeModerated, ChannelModeNoOutsideMessages,
ChannelModePrivate, ChannelModeSecret, ChannelModeQuiet, ChannelModeReOp, ChannelModeTopic:
if flag == ChannelModeAnonymous {
switch channel.Name[0] {
case '#', '+': // # and + channels can't be anonymous
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_UNKNOWNMODE, Params: []string{client.Nickname, string(flag)}, Trailing: "is unknown mode char to me for " + channel.Name}
client.Encode(&m)
continue
case '!': // ! Channels can only have anonymous flag set, not unset
if modifier == ModeModifierRemove {
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_UNKNOWNMODE, Params: []string{client.Nickname, string(flag)}, Trailing: "is unknown mode char to me for " + channel.Name}
client.Encode(&m)
continue
}
}
}
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found := channel.HasMode(flag)
if modifier == ModeModifierAdd {
if !found {
if flag == ChannelModePrivate && channel.HasMode(ChannelModeSecret) {
// Secret and private can't both be set
continue
}
if flag == ChannelModeSecret && channel.HasMode(ChannelModePrivate) {
// Secret and private can't both be set
channel.RemoveMode(ChannelModePrivate)
}
channel.AddMode(flag)
changes = append(changes, fullFlag{modifier, flag, ""})
}
} else {
if found {
channel.RemoveMode(flag)
changes = append(changes, fullFlag{modifier, flag, ""})
}
}
default:
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_UNKNOWNMODE, Params: []string{client.Nickname, string(flag)}, Trailing: "is unknown mode char to me for " + channel.Name}
client.Encode(&m)
}
}
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}
}
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if len(changes) == 0 { // No changes were made
if len(needsArgs) != 0 { // query instead of modification
arg := needsArgs[0] //just return information on just one flag
m := irc.Message{Prefix: client.Server.Prefix, Params: []string{client.Nickname}}
switch arg.ChannelMode {
case ChannelModeBan:
m.Command = irc.RPL_BANLIST
for mask := range channel.GetBanMasks() {
p := irc.ParsePrefix(mask)
fmt.Println("New BanMask: ", p.String())
m.Params = []string{client.Nickname, channel.Name, mask}
client.Encode(&m)
}
m.Params = []string{client.Nickname, channel.Name}
m.Trailing = "End of channel ban list"
m.Command = irc.RPL_ENDOFBANLIST
client.Encode(&m)
case ChannelModeExceptionMask:
m.Command = irc.RPL_EXCEPTLIST
for mask := range channel.GetExceptionMasks() {
m.Params = []string{client.Nickname, channel.Name, mask}
client.Encode(&m)
}
m.Params = []string{client.Nickname, channel.Name}
m.Trailing = "End of channel exception list"
m.Command = irc.RPL_ENDOFEXCEPTLIST
client.Encode(&m)
case ChannelModeInvitationMask:
m.Command = irc.RPL_INVITELIST
for mask := range channel.GetInvitationMasks() {
m.Params = []string{client.Nickname, channel.Name, mask}
client.Encode(&m)
}
m.Params = []string{client.Nickname, channel.Name}
m.Trailing = "End of channel invite list"
m.Command = irc.RPL_ENDOFINVITELIST
client.Encode(&m)
}
}
return
}
changeString := ""
paramsChanged := []string{}
previousMode := ModeModifier(' ')
for _, change := range changes {
if len(change.Param) != 0 {
paramsChanged = append(paramsChanged, change.Param)
}
if change.ModeModifier != previousMode {
changeString += string(change.ModeModifier)
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}
changeString += string(change.ChannelMode)
previousMode = change.ModeModifier
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}
params := []string{channel.Name, changeString}
params = append(params, paramsChanged...)
m := irc.Message{Prefix: client.Prefix, Command: irc.MODE, Params: params}
// Notify channel members of channel changes
channel.SendMessage(&m)
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return
}
// NamesHandler is a specialized CommandHandler to respond to channel IRC NAMES commands from a client
// Implemented according to RFC 1459 Section 4.2.5 and RFC 2812 Section 3.2.5
func NamesHandler(message *irc.Message, client *Client) {
if len(message.Params) == 0 { // Send NAMES response for all channels
named := map[string]interface{}{}
for _, ch := range client.Server.channels {
n := ch.Names(client)
for _, k := range n {
named[k] = nil
}
}
count := 0
memberStr := ""
for n, cl := range client.Server.clientsByNick {
_, alreadyNamed := named[n]
if !alreadyNamed && !cl.HasMode(UserModeInvisible) { //don't name people that are already named or that shouldn't be named
count++
if cl != nil {
if cl.HasMode(UserModeOperator) || cl.HasMode(UserModeLocalOperator) {
memberStr += "@"
}
memberStr += cl.Nickname + " "
}
if count%20 == 0 { // String is long enough, send message
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.RPL_NAMREPLY, Params: []string{client.Nickname, "*", "*"}, Trailing: memberStr}
client.Encode(&m)
memberStr = ""
}
}
}
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.RPL_NAMREPLY, Params: []string{client.Nickname, "*", "*"}, Trailing: memberStr}
client.Encode(&m)
m = irc.Message{Prefix: client.Server.Prefix, Command: irc.RPL_ENDOFNAMES, Params: []string{client.Nickname, "*"}, Trailing: "End of NAMES list"}
client.Encode(&m)
return
}
if len(message.Params) == 2 { //Client has provided target server for the request
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NOSUCHSERVER, Params: []string{client.Nickname, message.Params[0]}, Trailing: "No such server"}
client.Encode(&m)
return
}
channelNames := strings.Split(message.Params[0], ",")
for _, channelName := range channelNames {
ch, ok := client.Server.GetChannel(channelName)
if ok {
ch.Names(client)
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.RPL_ENDOFNAMES, Params: []string{client.Nickname, ch.Name}, Trailing: "End of NAMES list"}
client.Encode(&m)
}
}
}
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// MOTDHandler is a specialized CommandHandler to respond to channel IRC MOTD commands from a client
// Implemented according to RFC 1459 Section 8.5 and RFC 2812 Section 3.4.1
func MOTDHandler(message *irc.Message, client *Client) {
client.MOTD()
}
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// ListHandler is a specialized CommandHandler to respond to channel IRC LIST commands from a client
// Implemented according to RFC 1459 Section 4.2.6 and RFC 2812 Section 3.2.6
func ListHandler(message *irc.Message, client *Client) {
/* Deprecated in RFC 2812
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.RPL_LISTSTART, Params: []string{client.Nickname, "Channel :Users Name"}}
client.Encode(&m)
*/
if len(message.Params) == 0 || len(message.Params[0]) == 0 { // Send LIST response for all channels
for _, ch := range client.Server.channels {
m := ch.ListMessage(client)
if m != nil {
fmt.Println(m.String())
client.Encode(m)
}
}
} else {
channelNames := strings.Split(message.Params[0], ",")
for _, channelName := range channelNames {
ch, ok := client.Server.GetChannel(channelName)
if ok {
m := ch.ListMessage(client)
if m != nil {
fmt.Println(m.String())
client.Encode(m)
}
}
}
}
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.RPL_LISTEND, Params: []string{client.Nickname}, Trailing: "End of LIST"}
client.Encode(&m)
}
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// KickHandler is a specialized CommandHandler to respond to channel IRC KICK commands from a client
// Implemented according to RFC 1459 Section 4.2.8 and RFC 2812 Section 3.2.8
func KickHandler(message *irc.Message, client *Client) {
if len(message.Params) == 0 {
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NEEDMOREPARAMS, Trailing: "Not enough parameters"}
client.Encode(&m)
return
}
channels := strings.Split(message.Params[0], ",")
nicks := strings.Split(message.Params[1], ",")
if len(channels) != 1 && len(channels) != len(nicks) {
//"For the message to be syntactically correct, there MUST be either one channel parameter and multiple user parameter, or as many channel parameters as there are user parameters."
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NEEDMOREPARAMS, Trailing: "Not enough parameters"}
client.Encode(&m)
return
}
comment := message.Trailing
if len(message.Params) == 3 {
comment = message.Params[2]
}
if len(channels) == 1 {
ch, ok := client.Server.GetChannel(channels[0])
if ok {
ch.Kick(client, nicks, comment)
} else {
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NOSUCHCHANNEL, Params: []string{client.Nickname, channels[0]}, Trailing: "No such channel"}
client.Encode(&m)
}
return
}
for i, channel := range channels {
ch, ok := client.Server.GetChannel(channel)
if ok {
ch.Kick(client, []string{nicks[i]}, comment)
} else {
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NOSUCHCHANNEL, Params: []string{client.Nickname, channel}, Trailing: "No such channel"}
client.Encode(&m)
}
}
}
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// TimeHandler is a specialized CommandHandler to respond to channel IRC TIME commands from a client
// Implemented according to RFC 1459 Section 4.3.4 and RFC 2812 Section 3.4.6
func TimeHandler(message *irc.Message, client *Client) {
if len(message.Params) != 0 {
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NOSUCHSERVER, Params: []string{client.Nickname, message.Params[0]}, Trailing: "No such server"}
client.Encode(&m)
return
}
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.RPL_TIME, Params: []string{client.Nickname, client.Server.Config.Name}, Trailing: time.Now().Format(time.UnixDate)}
client.Encode(&m)
}
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// VersionHandler is a specialized CommandHandler to respond to channel IRC VERSION commands from a client
// Implemented according to RFC 1459 Section 4.3.1 and RFC 2812 Section 3.4.3
func VersionHandler(message *irc.Message, client *Client) {
if len(message.Params) != 0 {
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NOSUCHSERVER, Params: []string{client.Nickname, message.Params[0]}, Trailing: "No such server"}
client.Encode(&m)
return
}
p := fmt.Sprintf("%s.%s %s", client.Server.Config.Version, "", client.Server.Config.Name)
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.RPL_VERSION, Params: []string{client.Nickname, p}}
client.Encode(&m)
}
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// LinksHandler is a specialized CommandHandler to respond to channel IRC LINKS commands from a client
// Implemented according to RFC 1459 Section 4.3.3 and RFC 2812 Section 3.4.5
func LinksHandler(message *irc.Message, client *Client) {
if len(message.Params) == 2 {
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.ERR_NOSUCHSERVER, Params: []string{client.Nickname, message.Params[0]}, Trailing: "No such server"}
client.Encode(&m)
return
}
mask := "*"
if len(message.Params) != 0 {
mask = message.Params[0]
}
regMask := strings.Replace(mask, "*", ".*", -1)
ok, err := regexp.MatchString(regMask, client.Server.Config.Name)
if ok && err == nil {
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.RPL_LINKS, Params: []string{client.Nickname, mask, client.Server.Config.Name}, Trailing: "0"}
client.Encode(&m)
}
m := irc.Message{Prefix: client.Server.Prefix, Command: irc.RPL_ENDOFLINKS, Params: []string{client.Nickname, mask}, Trailing: "End of LINKS list"}
client.Encode(&m)
}