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ircMessages.go
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ircMessages.go
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package twitchchat
import (
"bytes"
"log"
"regexp"
"strconv"
"strings"
)
type MessageCommand int
const (
UNKNOWN MessageCommand = iota
CLEARCHAT
CLEARMSG
GLOBALUSERSTATE
HOSTTARGET
JOIN
NOTICE
PART
PING
PRIVMSG
RECONNECT
ROOMSTATE
USERNOTICE
USERSTATE
)
var MessageCommandLookup = map[string]MessageCommand{
"CLEARCHAT": CLEARCHAT,
"CLEARMSG": CLEARMSG,
"GLOBALUSERSTATE": GLOBALUSERSTATE,
"HOSTTARGET": HOSTTARGET,
"JOIN": JOIN,
"NOTICE": NOTICE,
"PART": PART,
"PING": PING,
"PRIVMSG": PRIVMSG,
"RECONNECT": RECONNECT,
"ROOMSTATE": ROOMSTATE,
"USERNOTICE": USERNOTICE,
"USERSTATE": USERSTATE,
}
type ircPrefix struct {
Nickname string
User string
Host string
}
type RawIrcMessage struct {
RawMessage []byte
RawTags map[string]string
ircPrefix
RawCommand MessageCommand
RawParams [][]byte
}
type ClearChat struct {
RawIrcMessage
BanDuration uint
Channel string
User string
}
type ClearMsg struct {
RawIrcMessage
Channel string
Login string
Message string
TargetMsgId string
}
type GlobalUserState struct {
RawIrcMessage
BadgeInfo string
Badges string
Color string
DisplayName string
EmoteSets string
Turbo string
UserId string
UserType string
}
type HostTarget struct {
RawIrcMessage
Channel string
NumberOfViewers uint
TargetChannel string
}
type Join struct {
RawIrcMessage
Channel string
}
type Notice struct {
RawIrcMessage
Channel string
Message string
MsgId string
}
type Part struct {
RawIrcMessage
Channel string
}
type Ping struct {
RawIrcMessage
Servers []string
}
type PrivMsg struct {
RawIrcMessage
BadgeInfo string
Badges string
Bits string
Channel string
Color string
DisplayName string
Emotes string
Id string
Message string
Mod string
RoomId string
Subscriber string
TmiSentTs string
Turbo string
UserId string
UserType string
}
type Reconnect struct {
RawIrcMessage
}
type RoomState struct {
RawIrcMessage
Channel string
EmoteOnly bool
FollowersOnly int
R9K bool
Slow uint
SubsOnly bool
}
type UserNotice struct {
RawIrcMessage
BadgeInfo string
Badges string
Channel string
Color string
DisplayName string
Emotes string
Id string
Login string
Message string
Mod string
MsgId string
RoomId string
Subscriber bool
SystemMsg string
TmiSentTs string
Turbo string
UserId string
UserType string
// On Sub.Resub
// MsgParamCumulativeMonths string
// // On Raid
// MsgParamDisplayName string
// MsgParamLogin string
// // On Subgift/anonsubgift
// MsgParamMonths string
// // anongiftpaidupgrade/giftpaidupgrade
// MsgParamPromoGiftTotal string
// MsgParamPromoName string
// MsgParamRecipientDisplayName string
// MsgParamRecipientId string
// MsgParamRecipientUserName string
// MsgParamSenderLogin string
// MsgParamSenderName string
// MsgParamShouldShareStreak string
// MsgParamStreakMonths string
// MsgParamSubPlan string
// MsgParamSubPlanName string
// MsgParamViewerCount string
// MsgParamRitualName string
// MsgParamThreshold string
// MsgParamGiftMonths string
}
type UserState struct {
RawIrcMessage
BadgeInfo string
Badges string
Channel string
Color string
DisplayName string
EmoteSets string
Mod string
Subscriber bool
Turbo string
UserType string
}
func getStringFromTags(tags map[string]string, key string) string {
if str, ok := tags[key]; ok {
return str
} else {
return ""
}
}
func getChannel(params [][]byte) string {
if len(params) > 0 {
if bytes.HasPrefix(params[0], []byte("#")) {
return string(params[0][1:])
}
}
return ""
}
func getUintFromTags(tags map[string]string, key string) uint {
str := getStringFromTags(tags, key)
if str != "" {
if num, err := strconv.ParseUint(str, 10, 32); err == nil {
return uint(num)
}
}
return 0
}
func getIntFromTags(tags map[string]string, key string) int {
str := getStringFromTags(tags, key)
if str != "" {
if num, err := strconv.ParseInt(str, 10, 32); err == nil {
return int(num)
}
}
return 0
}
func getBoolFromTags(tags map[string]string, key string) bool {
str := getStringFromTags(tags, key)
if str != "" {
if num, err := strconv.ParseUint(str, 10, 32); err == nil {
// 1 is true, 0 is false
return num == 1
}
}
return false
}
func newClearChatMsg(rawMsg RawIrcMessage) *ClearChat {
msg := ClearChat{
RawIrcMessage: rawMsg,
BanDuration: getUintFromTags(rawMsg.RawTags, "ban-duration"),
Channel: getChannel(rawMsg.RawParams),
}
if len(rawMsg.RawParams) > 1 {
if bytes.HasPrefix(rawMsg.RawParams[1], []byte(":")) {
msg.User = string(rawMsg.RawParams[1][1:])
}
}
return &msg
}
func newClearMsgMsg(rawMsg RawIrcMessage) *ClearMsg {
msg := ClearMsg{
RawIrcMessage: rawMsg,
Channel: getChannel(rawMsg.RawParams),
Login: getStringFromTags(rawMsg.RawTags, "login"),
TargetMsgId: getStringFromTags(rawMsg.RawTags, "target-msg-id"),
}
// Params[0] should be the Channel, the rest are the message
if len(msg.RawParams) > 1 {
msg.Message = string(bytes.Join(msg.RawParams[1:], []byte(" ")))
msg.Message = strings.TrimPrefix(msg.Message, ":")
}
return &msg
}
func newGlobalUserStateMsg(rawMsg RawIrcMessage) *GlobalUserState {
msg := GlobalUserState{
RawIrcMessage: rawMsg,
BadgeInfo: getStringFromTags(rawMsg.RawTags, "badge-info"),
Badges: getStringFromTags(rawMsg.RawTags, "badges"),
Color: getStringFromTags(rawMsg.RawTags, "color"),
DisplayName: getStringFromTags(rawMsg.RawTags, "display-name"),
EmoteSets: getStringFromTags(rawMsg.RawTags, "emote-sets"),
Turbo: getStringFromTags(rawMsg.RawTags, "turbo"),
UserId: getStringFromTags(rawMsg.RawTags, "user-id"),
UserType: getStringFromTags(rawMsg.RawTags, "user-type"),
}
return &msg
}
func newHostTargetMsg(rawMsg RawIrcMessage) *HostTarget {
msg := HostTarget{
RawIrcMessage: rawMsg,
Channel: getChannel(rawMsg.RawParams),
}
if len(rawMsg.RawParams) > 1 {
msg.TargetChannel = string(bytes.TrimPrefix(rawMsg.RawParams[1], []byte(":")))
}
if len(rawMsg.RawParams) > 2 {
if num, err := strconv.ParseUint(string(rawMsg.RawParams[2]), 10, 32); err == nil {
msg.NumberOfViewers = uint(num)
}
}
return &msg
}
func newJoinMsg(rawMsg RawIrcMessage) *Join {
msg := Join{
RawIrcMessage: rawMsg,
Channel: getChannel(rawMsg.RawParams),
}
return &msg
}
func newNoticeMsg(rawMsg RawIrcMessage) *Notice {
msg := Notice{
RawIrcMessage: rawMsg,
Channel: getChannel(rawMsg.RawParams),
MsgId: getStringFromTags(rawMsg.RawTags, "msg-id"),
}
// Params[0] should be the Channel, the rest are the message
if len(msg.RawParams) > 1 {
msg.Message = string(bytes.Join(msg.RawParams[1:], []byte(" ")))
msg.Message = strings.TrimPrefix(msg.Message, ":")
}
return &msg
}
func newPartMsg(rawMsg RawIrcMessage) *Part {
msg := Part{
RawIrcMessage: rawMsg,
Channel: getChannel(rawMsg.RawParams),
}
return &msg
}
func newPingMsg(rawMsg RawIrcMessage) *Ping {
msg := Ping{
RawIrcMessage: rawMsg,
}
msg.Servers = make([]string, len(rawMsg.RawParams))
for i, server := range rawMsg.RawParams {
msg.Servers[i] = string(server)
}
return &msg
}
func newPrivMsgMsg(rawMsg RawIrcMessage) *PrivMsg {
msg := PrivMsg{
RawIrcMessage: rawMsg,
BadgeInfo: getStringFromTags(rawMsg.RawTags, "badge-info"),
Badges: getStringFromTags(rawMsg.RawTags, "badges"),
Bits: getStringFromTags(rawMsg.RawTags, "bits"),
Channel: getChannel(rawMsg.RawParams),
Color: getStringFromTags(rawMsg.RawTags, "color"),
DisplayName: getStringFromTags(rawMsg.RawTags, "display-name"),
Emotes: getStringFromTags(rawMsg.RawTags, "emotes"),
Id: getStringFromTags(rawMsg.RawTags, "id"),
Mod: getStringFromTags(rawMsg.RawTags, "mod"),
RoomId: getStringFromTags(rawMsg.RawTags, "room-id"),
Subscriber: getStringFromTags(rawMsg.RawTags, "subscriber"),
TmiSentTs: getStringFromTags(rawMsg.RawTags, "tmi-sent-ts"),
Turbo: getStringFromTags(rawMsg.RawTags, "turbo"),
UserId: getStringFromTags(rawMsg.RawTags, "user-id"),
UserType: getStringFromTags(rawMsg.RawTags, "user-type"),
}
// Params[0] should be the Channel, the rest are the message
if len(msg.RawParams) > 1 {
msg.Message = string(bytes.Join(msg.RawParams[1:], []byte(" ")))
msg.Message = strings.TrimPrefix(msg.Message, ":")
}
return &msg
}
func newReconnectMsg(rawMsg RawIrcMessage) *Reconnect {
msg := Reconnect{
RawIrcMessage: rawMsg,
}
return &msg
}
func newRoomStateMsg(rawMsg RawIrcMessage) *RoomState {
msg := RoomState{
RawIrcMessage: rawMsg,
EmoteOnly: getBoolFromTags(rawMsg.RawTags, "emote-only"),
FollowersOnly: getIntFromTags(rawMsg.RawTags, "emote-only"),
R9K: getBoolFromTags(rawMsg.RawTags, "r9k"),
Slow: getUintFromTags(rawMsg.RawTags, "slow"),
SubsOnly: getBoolFromTags(rawMsg.RawTags, "subs-only"),
}
return &msg
}
func newUserNoticeMsg(rawMsg RawIrcMessage) *UserNotice {
msg := UserNotice{
RawIrcMessage: rawMsg,
BadgeInfo: getStringFromTags(rawMsg.RawTags, "badge-info"),
Badges: getStringFromTags(rawMsg.RawTags, "badges"),
Channel: getChannel(rawMsg.RawParams),
Color: getStringFromTags(rawMsg.RawTags, "color"),
DisplayName: getStringFromTags(rawMsg.RawTags, "display-name"),
Emotes: getStringFromTags(rawMsg.RawTags, "emotes"),
Id: getStringFromTags(rawMsg.RawTags, "id"),
Login: getStringFromTags(rawMsg.RawTags, "login"),
Mod: getStringFromTags(rawMsg.RawTags, "mod"),
MsgId: getStringFromTags(rawMsg.RawTags, "msg-id"),
RoomId: getStringFromTags(rawMsg.RawTags, "room-id"),
Subscriber: getBoolFromTags(rawMsg.RawTags, "subscriber"),
TmiSentTs: getStringFromTags(rawMsg.RawTags, "tmi-sent-ts"),
Turbo: getStringFromTags(rawMsg.RawTags, "turbo"),
UserId: getStringFromTags(rawMsg.RawTags, "user-id"),
UserType: getStringFromTags(rawMsg.RawTags, "user-type"),
}
// Params[0] should be the Channel, the rest are the message
if len(msg.RawParams) > 1 {
msg.Message = string(bytes.Join(msg.RawParams[1:], []byte(" ")))
msg.Message = strings.TrimPrefix(msg.Message, ":")
}
return &msg
}
func newUserStateMsg(rawMsg RawIrcMessage) *UserState {
msg := UserState{
RawIrcMessage: rawMsg,
BadgeInfo: getStringFromTags(rawMsg.RawTags, "badge-info"),
Badges: getStringFromTags(rawMsg.RawTags, "badges"),
Channel: getChannel(rawMsg.RawParams),
Color: getStringFromTags(rawMsg.RawTags, "color"),
DisplayName: getStringFromTags(rawMsg.RawTags, "display-name"),
EmoteSets: getStringFromTags(rawMsg.RawTags, "emote-sets"),
Mod: getStringFromTags(rawMsg.RawTags, "mod"),
Subscriber: getBoolFromTags(rawMsg.RawTags, "subscriber"),
Turbo: getStringFromTags(rawMsg.RawTags, "turbo"),
UserType: getStringFromTags(rawMsg.RawTags, "user-type"),
}
return &msg
}
// Empty interface for handling IRC messages
type IrcMessage interface{}
func newIrcMessage(rawMsg RawIrcMessage) IrcMessage {
var rval IrcMessage
rval = &rawMsg
switch rawMsg.RawCommand {
case CLEARCHAT:
rval = newClearChatMsg(rawMsg)
case CLEARMSG:
rval = newClearMsgMsg(rawMsg)
case GLOBALUSERSTATE:
rval = newGlobalUserStateMsg(rawMsg)
case HOSTTARGET:
rval = newHostTargetMsg(rawMsg)
case JOIN:
rval = newJoinMsg(rawMsg)
case NOTICE:
rval = newNoticeMsg(rawMsg)
case PART:
rval = newPartMsg(rawMsg)
case PING:
rval = newPingMsg(rawMsg)
case PRIVMSG:
rval = newPrivMsgMsg(rawMsg)
case RECONNECT:
rval = newReconnectMsg(rawMsg)
case ROOMSTATE:
rval = newRoomStateMsg(rawMsg)
case USERNOTICE:
rval = newUserNoticeMsg(rawMsg)
case USERSTATE:
rval = newUserStateMsg(rawMsg)
}
return rval
}
func bytesToIrcMessage(buffer []byte) IrcMessage {
rawMsg := RawIrcMessage{
RawMessage: buffer,
RawCommand: UNKNOWN,
RawTags: make(map[string]string),
}
msgPieces := bytes.Split(buffer, []byte(" "))
currentIndex := 0
// Tags are included
// @<key>=<val>;<key>=<val>....
if bytes.HasPrefix(msgPieces[currentIndex], []byte("@")) {
msgPieces[currentIndex] = bytes.TrimPrefix(msgPieces[currentIndex], []byte("@"))
tags := bytes.Split(msgPieces[currentIndex], []byte(";"))
for i := range tags {
keyVal := bytes.Split(tags[i], []byte("="))
if len(keyVal) == 2 {
rawMsg.RawTags[string(keyVal[0])] = string(keyVal[1])
}
}
currentIndex++
}
// Message contains source information
// :tmi.twitch.tv or :<user>!<user>@<user>.tmi.twitch.tv
if bytes.HasPrefix(msgPieces[currentIndex], []byte(":")) {
msgPieces[currentIndex] = bytes.TrimPrefix(msgPieces[currentIndex], []byte(":"))
pieces := regexp.MustCompile(`!|@`).Split(string(msgPieces[currentIndex]), -1)
switch len(pieces) {
case 1:
rawMsg.Host = pieces[0]
case 3:
rawMsg.Nickname = pieces[0]
rawMsg.User = pieces[1]
rawMsg.Host = pieces[2]
default:
log.Println(pieces)
}
currentIndex++
}
if len(msgPieces) > currentIndex {
rawMsg.RawCommand = MessageCommandLookup[string(msgPieces[currentIndex])]
currentIndex++
}
if len(msgPieces) > currentIndex {
rawMsg.RawParams = msgPieces[currentIndex:]
}
return newIrcMessage(rawMsg)
}