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GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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Preamble
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How to Apply These Terms to Your New Programs
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<http://www.gnu.org/philosophy/why-not-lgpl.html>.

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linger
Barebones TUI for private instances of The Lounge.
Requires Go, gosf-socketio, Bubble Tea, Bubbles, and Termenv.
Send questions, issues, and patches to flewkey@2a03.party.
Controls: CTRL+S to select a channel; Arrow keys to scroll
This program is broken and needs to be completely rewritten.

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package main
import (
tea "github.com/charmbracelet/bubbletea"
)
type channelsModel struct {
index int
}
func doOpenChannel(conn *loungeConnection, channel *loungeChannel) tea.Cmd {
return func() tea.Msg {
loungeChannelOpen(conn, channel)
return 1
}
}
func channelsModelInit() channelsModel {
return channelsModel{0}
}
func (m mainModel) channelsInit() tea.Cmd {
return nil
}
func (m mainModel) channelsView() string {
height := m.height - 1
pages := []string{}
pageIndex := []int{}
buf := ""
curIndex := 0
curPage := 0
curLine := 0
for i := 0; i < len(m.conn.Networks); i++ {
net := m.conn.Networks[i]
for i := 0; i < len(net.Channels); i++ {
if net.Channels[i].Type != "lobby" {
buf += "\t"
}
if m.channelsModel.index == curIndex {
buf += highlightText(net.Channels[i].Name) + "\n"
} else {
buf += net.Channels[i].Name + "\n"
}
pageIndex = append(pageIndex, curPage)
curIndex++
curLine++
if curLine >= height - 1 {
curPage++
curLine = 0
pages = append(pages, buf[:len(buf)-1])
buf = ""
}
}
buf += "\n"
curLine += 1
}
if buf != "" {
pages = append(pages, buf[:len(buf)-1])
}
s := "Select a channel\n"
if len(pageIndex) > 0 {
if m.channelsModel.index < len(pageIndex) {
s += pages[pageIndex[m.channelsModel.index]]
} else {
s += pages[len(pages) - 1]
}
} else {
s += "No networks found"
}
return s
}
func (m mainModel) channelsUpdate(msg tea.Msg) (tea.Model, tea.Cmd) {
var cmd tea.Cmd
channels := []*loungeChannel{}
for i := 0; i < len(m.conn.Networks); i++ {
net := m.conn.Networks[i]
for i := 0; i < len(net.Channels); i++ {
channels = append(channels, &net.Channels[i])
}
}
index := m.channelsModel.index
_, index, button := updateIndex(msg, m.channelsModel.index, len(channels), true, []int{})
m.channelsModel.index = index
if button && index < len(channels) {
cmd = doOpenChannel(m.conn, channels[index])
m.view = viewChat
m.chatModel.chatInput.SetValue("")
}
return m, cmd
}

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package main
import (
"strings"
tea "github.com/charmbracelet/bubbletea"
te "github.com/muesli/termenv"
"github.com/charmbracelet/bubbles/textinput"
)
type chatModel struct {
scroll int
chatInput textinput.Model
}
func doSendMessage(conn *loungeConnection, channel int, text string) tea.Cmd {
return func() tea.Msg {
loungeChannelSend(conn, channel, text)
return 1
}
}
func getMessageString(channelName string, message loungeMessage) string {
timestamp := message.Time[11:16]
switch message.Type {
case messageMessage, messageNotice:
if message.From.Nick == "" {
return timestamp + " " + message.Text + "\n"
} else {
return timestamp + " <" + message.From.Mode + message.From.Nick + "> " + message.Text + "\n"
}
case messageAction:
return timestamp + " " + te.String(message.From.Mode + message.From.Nick + " " + message.Text).Italic().String() + "\n"
case messageTopic:
return timestamp + " " + te.String(message.From.Mode + message.From.Nick + " changed the topic to: " + message.Text).Italic().String() + "\n"
case messageError:
return timestamp + " " + te.String(message.Text).Foreground(color(errorColor)).String() + "\n"
}
return ""
}
func getMessageCounts(m mainModel) (int, int, int) {
maxMessages := m.height - 2
messageCount := maxMessages
if messageCount > len(m.conn.Channel.Filtered) {
messageCount = len(m.conn.Channel.Filtered)
}
maxScroll := len(m.conn.Channel.Filtered) - messageCount
return maxMessages, messageCount, maxScroll
}
func chatModelInit() chatModel {
input := textinput.NewModel()
input.Placeholder = "Enter a chat message"
input.CharLimit = 64
input.Focus()
return chatModel{0, input}
}
func (m mainModel) chatInit() tea.Cmd {
return nil
}
func (m mainModel) chatView() string {
channel := m.conn.Channel
if channel == nil {
return "No channel open"
}
s := te.String(channel.Name).Reverse().String() + " "
maxTopicLen := m.width - len(channel.Name) - 1
if maxTopicLen < 3 {
s += "\n"
} else if len(channel.Topic) <= maxTopicLen {
s += highlightText(channel.Topic) + "\n"
} else {
s += highlightText(channel.Topic[:maxTopicLen-3] + "...") + "\n"
}
maxMessages, messageCount, maxScroll := getMessageCounts(m)
if m.chatModel.scroll > maxScroll {
m.chatModel.scroll = maxScroll
}
for i := 0; i < messageCount; i++ {
index := len(channel.Filtered) - messageCount - m.chatModel.scroll + i
s += getMessageString(channel.Name, channel.Filtered[index])
}
s += strings.Repeat("\n", maxMessages - messageCount)
s += m.chatModel.chatInput.View()
return s
}
func (m mainModel) chatUpdate(msg tea.Msg) (tea.Model, tea.Cmd) {
var (
cmd tea.Cmd
cmds []tea.Cmd
)
switch msg := msg.(type) {
case tea.KeyMsg:
if msg.Type == tea.KeyEnter && m.chatModel.chatInput.Value() != "" {
cmd = doSendMessage(m.conn, m.conn.Channel.Id, m.chatModel.chatInput.Value())
cmds = append(cmds, cmd)
m.chatModel.chatInput.SetValue("")
}
_, _, maxScroll := getMessageCounts(m)
if m.chatModel.scroll > maxScroll {
m.chatModel.scroll = maxScroll
}
if msg.Type == tea.KeyUp {
m.chatModel.scroll += 1
}
if msg.Type == tea.KeyDown && m.chatModel.scroll > 0 {
m.chatModel.scroll -= 1
}
}
m.chatModel.chatInput, cmd = m.chatModel.chatInput.Update(msg)
cmds = append(cmds, cmd)
return m, tea.Batch(cmds...)
}

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common.go Normal file
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package main
import (
tea "github.com/charmbracelet/bubbletea"
te "github.com/muesli/termenv"
"github.com/charmbracelet/bubbles/textinput"
)
var (
color = te.ColorProfile().Color
errorColor = "9"
blurredColor = "8"
focusedColor = "3"
focusedPrompt = te.String("> ").Foreground(color(focusedColor)).String()
blurredPrompt = "> "
)
func highlightText(text string) string {
return te.String(text).Foreground(color(focusedColor)).String()
}
func getButton(title string, focused bool) string {
clr := color(blurredColor)
if focused == true {
clr = color(focusedColor)
}
return "[ " + te.String(title).Foreground(clr).String() + " ]"
}
func updateIndex(msg tea.Msg, index int, length int, bindVim bool, buttons []int) (bool, int, bool) {
switch msg := msg.(type) {
case tea.KeyMsg:
s := msg.String()
inputs := []string{"down", "tab", "j", "enter", "up", "shift+tab", "k"}
update := false
for i := 0; i < len(inputs); i++ {
if s == inputs[i] {
update = true
}
}
if !update {
return false, index, false
}
if !bindVim && (s == "j" || s == "k") {
return false, index, false
}
if s == "down" || s == "tab" || s == "j" || s == "enter" {
button := false
if len(buttons) == 0 {
button = true;
} else {
for i := 0; i < len(buttons); i++ {
if index == buttons[i] {
button = true
}
}
}
if s == "enter" && button {
return false, index, true
}
if index >= length - 1 {
return true, 0, false
}
index++
return true, index, false
} else {
if index <= 0 {
return true, length - 1, false
}
index--
return true, index, false
}
}
return false, index, false
}
func inputFocus(input textinput.Model) textinput.Model {
input.Focus()
input.Prompt = focusedPrompt
input.TextColor = focusedColor
return input
}
func inputBlur(input textinput.Model) textinput.Model {
input.Blur()
input.Prompt = blurredPrompt
input.TextColor = ""
return input
}

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package main
import (
"os"
"log"
"io/ioutil"
"encoding/json"
)
type config struct {
Host string `json:"host"`
Path string `json:"path"`
User string `json:"user"`
Token string `json:"token"`
}
func handleTilde(in string) string {
if in[0] != '~' {
return in
}
return os.Getenv("HOME") + in[1:]
}
func configPath() string {
confHome := os.Getenv("XDG_CONFIG_HOME")
if confHome == "" {
confHome = "~/.config"
}
confDir := handleTilde(confHome) + "/linger"
_ = os.Mkdir(confDir, 0755)
return confDir + "/config.json"
}
func configLoad() *config {
conf := config{}
data, err := ioutil.ReadFile(configPath())
if err != nil {
return &conf
}
err = json.Unmarshal(data, &conf)
if err != nil {
return &conf
}
return &conf
}
func configWrite(conf *config) {
data, err := json.Marshal(conf)
err = ioutil.WriteFile(configPath(), data, 0644)
if err != nil {
log.Fatal("Failed to write config")
}
}

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package main
import (
tea "github.com/charmbracelet/bubbletea"
"github.com/charmbracelet/bubbles/textinput"
)
type loginModel struct {
index int
hostInput textinput.Model
pathInput textinput.Model
userInput textinput.Model
passInput textinput.Model
loginButton string
message string
}
func doConnect(conf *config, conn *loungeConnection) tea.Cmd {
conf.Host = conn.Host
conf.Path = conn.Path
conf.User = conn.User
configWrite(conf)
return func() tea.Msg {
loungeConnect(conn)
return 1
}
}
func loginModelInit(conf *config) loginModel {
host := textinput.NewModel()
host.Placeholder = "Host"
host.Prompt = focusedPrompt
host.TextColor = focusedColor
host.CharLimit = 64
host.Focus()
host.SetValue(conf.Host)
path := textinput.NewModel()
path.Placeholder = "Path"
path.Prompt = blurredPrompt
path.CharLimit = 64
path.SetValue(conf.Path)
user := textinput.NewModel()
user.Placeholder = "Username"
user.Prompt = blurredPrompt
user.CharLimit = 32
user.SetValue(conf.User)
pass := textinput.NewModel()
pass.Placeholder = "Password"
pass.Prompt = blurredPrompt
pass.CharLimit = 64
pass.EchoMode = textinput.EchoNone
loginButton := getButton("Login", false)
return loginModel{0, host, path, user, pass, loginButton, ""}
}
func (m mainModel) loginInit(conf *config) tea.Cmd {
if conf.Token != "" {
m.conn.Host = m.conf.Host
m.conn.Path = m.conf.Path
m.conn.User = m.conf.User
m.conn.Pass = ""
m.conn.Token = m.conf.Token
return doConnect(m.conf, m.conn)
}
return nil
}
func (m mainModel) loginView() string {
s := "Log in to The Lounge\n\n"
inputs := []string{
m.loginModel.hostInput.View(),
m.loginModel.pathInput.View(),
m.loginModel.userInput.View(),
m.loginModel.passInput.View(),
}
for i := 0; i < len(inputs); i++ {
s += inputs[i]
if i < len(inputs)-1 {
s += "\n"
}
}
s += "\n\n" + m.loginModel.loginButton + "\n"
if m.loginModel.message != "" {
s += "\n" + m.loginModel.message + "\n"
}
return s
}
func (m mainModel) loginUpdate(msg tea.Msg) (tea.Model, tea.Cmd) {
var (
cmd tea.Cmd
cmds []tea.Cmd
)
index := m.loginModel.index
refocus, index, button := updateIndex(msg, m.loginModel.index, 5, false, []int{4})
m.loginModel.index = index
if m.conn.Error != "" {
m.loginModel.message = m.conn.Error
}
if refocus {
inputs := []textinput.Model{
m.loginModel.hostInput,
m.loginModel.pathInput,
m.loginModel.userInput,
m.loginModel.passInput,
}
for i := 0; i < len(inputs); i++ {
if i == m.loginModel.index {
inputs[i] = inputFocus(inputs[i])
} else {
inputs[i] = inputBlur(inputs[i])
}
}
if m.loginModel.index == len(inputs) {
m.loginModel.loginButton = getButton("Login", true)
} else {
m.loginModel.loginButton = getButton("Login", false)
}
m.loginModel.hostInput = inputs[0]
m.loginModel.pathInput = inputs[1]
m.loginModel.userInput = inputs[2]
m.loginModel.passInput = inputs[3]
}
if button {
m.conn.Host = m.loginModel.hostInput.Value()
m.conn.Path = m.loginModel.pathInput.Value()
m.conn.User = m.loginModel.userInput.Value()
m.conn.Pass = m.loginModel.passInput.Value()
cmd = doConnect(m.conf, m.conn)
cmds = append(cmds, cmd)
}
m, cmd = loginUpdateInputs(msg, m)
cmds = append(cmds, cmd)
return m, tea.Batch(cmds...)
}
func loginUpdateInputs(msg tea.Msg, m mainModel) (mainModel, tea.Cmd) {
var (
cmd tea.Cmd
cmds []tea.Cmd
)
inputs := []textinput.Model{
m.loginModel.hostInput,
m.loginModel.pathInput,
m.loginModel.userInput,
m.loginModel.passInput,
}
for i := 0; i < len(inputs); i++ {
inputs[i], cmd = inputs[i].Update(msg)
cmds = append(cmds, cmd)
}
m.loginModel.hostInput = inputs[0]
m.loginModel.pathInput = inputs[1]
m.loginModel.userInput = inputs[2]
m.loginModel.passInput = inputs[3]
return m, tea.Batch(cmds...)
}

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package main
import (
"log"
tea "github.com/charmbracelet/bubbletea"
)
var model mainModel
func main() {
p := tea.NewProgram(mainModelInit())
p.EnterAltScreen()
err := p.Start()
p.ExitAltScreen()
if err != nil {
log.Fatal(err)
}
}

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package main
import (
tea "github.com/charmbracelet/bubbletea"
)
type viewType int
const (
viewNone viewType = 0
viewLogin viewType = 1
viewChannels viewType = 2
viewChat viewType = 3
)
type mainModel struct {
conf *config
conn *loungeConnection
view viewType
width int
height int
loginModel loginModel
channelsModel channelsModel
chatModel chatModel
}
func mainModelInit() mainModel {
conf := configLoad()
conn := &loungeConnection{User: conf.User, Token: conf.Token, Action: actionNone}
login := loginModelInit(conf)
channels := channelsModelInit()
chat := chatModelInit()
return mainModel{conf, conn, viewLogin, 0, 0, login, channels, chat}
}
func (m mainModel) Init() tea.Cmd {
var (
cmd tea.Cmd
cmds []tea.Cmd
)
cmd = m.loginInit(m.conf)
cmds = append(cmds, cmd)
cmd = m.channelsInit()
cmds = append(cmds, cmd)
cmd = m.chatInit()
cmds = append(cmds, cmd)
return tea.Batch(cmds...)
}
func (m mainModel) View() string {
s := ""
switch m.view {
case viewLogin:
s = m.loginView()
case viewChannels:
s = m.channelsView()
case viewChat:
s = m.chatView()
}
return s
}
func (m mainModel) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
var model tea.Model = m
var cmd tea.Cmd = nil
switch msg := msg.(type) {
case tea.WindowSizeMsg:
if m.conn.Action != actionNone {
m = connActionHandle(m)
} else {
m.width = msg.Width
m.height = msg.Height
}
case tea.KeyMsg:
switch msg.String() {
case "ctrl+c", "esc":
return m, tea.Quit
case "ctrl+s":
if m.view != viewLogin {
m.view = viewChannels
}
}
}
switch m.view {
case viewLogin:
model, cmd = m.loginUpdate(msg)
case viewChannels:
model, cmd = m.channelsUpdate(msg)
case viewChat:
model, cmd = m.chatUpdate(msg)
}
return model, cmd
}

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package main
import (
"log"
"time"
"syscall"
gosocketio "github.com/ambelovsky/gosf-socketio"
"github.com/ambelovsky/gosf-socketio/transport"
)
var conn *loungeConnection
type loungeAuth struct {
User string `json:"user"`
Pass string `json:"password"`
Token string `json:"token"`
}
type loungeChannel struct {
Name string `json:"name"`
Type string `json:"type"`
Id int `json:"id"`
Topic string `json:"topic"`
Messages []loungeMessage `json:"messages"`
Filtered []loungeMessage
}
type loungeNetwork struct {
Uuid string `json:"uuid"`
Name string `json:"name"`
Channels []loungeChannel `json:"channels"`
}
type loungeInit struct {
Token string `json:"token"`
Networks []loungeNetwork `json:"networks"`
}
type loungeJoin struct {
Network string `json:"network"`
Channel loungeChannel `json:"chan"`
Index int `json:"index"`
}
type loungePart struct {
Channel int `json:"chan"`
}
type loungeFrom struct {
Mode string `json:"mode"`
Nick string `json:"nick"`
}
type loungeMessageType string
const (
messageMessage loungeMessageType = "message"
messageAction loungeMessageType = "action"
messageMode loungeMessageType = "mode"
messageTopic loungeMessageType = "topic"
messageNotice loungeMessageType = "notice"
messageError loungeMessageType = "error"
)
type loungeMessage struct {
From loungeFrom `json:"from"`
Highlight bool `json:"highlight"`
Id int `json:"id"`
Self bool `json:"self"`
Text string `json:"text"`
Time string `json:"time"`
Type loungeMessageType `json:"type"`
}
type loungeNewMessage struct {
Channel int `json:"chan"`
Message loungeMessage `json:"msg"`
Unread int `json:"unread"`
}
type loungeMoreRequest struct {
Target int `json:"target"`
LastId int `json:"lastId"`
Condensed bool `json:"condensed"`
}
type loungeMore struct {
Channel int `json:"chan"`
Messages []loungeMessage `json:"messages"`
TotalMessages int `json:"totalMessages"`
}
type loungeInput struct {
Target int `json:"target"`
Text string `json:"text"`
}
type loungeActionType int
const (
actionNone loungeActionType = 0
actionConnected loungeActionType = 1
actionDisconnected loungeActionType = 2
actionAuthSuccess loungeActionType = 3
actionAuthFailed loungeActionType = 4
actionInit loungeActionType = 5
actionJoin loungeActionType = 6
actionPart loungeActionType = 7
actionOpen loungeActionType = 8
actionMore loungeActionType = 9
actionNewMessage loungeActionType = 10
)
type loungeConnection struct {
Error string
Client *gosocketio.Client
Host string
Path string
User string
Pass string
Token string
Channel *loungeChannel
Networks []loungeNetwork
Action loungeActionType
}
func loungeFindChannel(conn *loungeConnection, channel int) *loungeChannel {
for i := 0; i < len(conn.Networks); i++ {
net := conn.Networks[i]
for i := 0; i < len(net.Channels); i++ {
if net.Channels[i].Id == channel {
return &net.Channels[i]
}
}
}
return nil
}
func loungeAuthenticate(conn *loungeConnection) {
var err error
if conn.Pass != "" {
err = conn.Client.Emit("auth:perform", loungeAuth{User: conn.User, Pass: conn.Pass})
} else {
err = conn.Client.Emit("auth:perform", loungeAuth{User: conn.User, Token: conn.Token})
}
if err != nil {
log.Fatal(err)
}
}
func loungeMessageFilter(message loungeMessage) bool {
if message.Type == messageMessage || message.Type == messageAction || message.Type == messageNotice || message.Type == messageError {
return true
}
if message.Type == messageTopic && message.From.Nick != "" {
return true
}
return false
}
func loungeMessageHandle(channel *loungeChannel, message loungeMessage) {
channel.Messages = append(channel.Messages, message)
if loungeMessageFilter(message) {
channel.Filtered = append(channel.Filtered, message)
}
if message.Type == messageTopic {
channel.Topic = message.Text
}
}
func loungeMessagesFilter(messages []loungeMessage) []loungeMessage {
filtered := []loungeMessage{}
for _, msg := range messages {
if loungeMessageFilter(msg) {
filtered = append(filtered, msg)
}
}
return filtered
}
func loungeMessagesUpdate(conn *loungeConnection) {
lastMessage := conn.Channel.Messages[len(conn.Channel.Messages) - 1]
err := conn.Client.Emit("more", loungeMoreRequest{conn.Channel.Id, lastMessage.Id, true})
if err != nil {
log.Fatal(err)
}
}
func loungeChannelOpen(conn *loungeConnection, channel *loungeChannel) {
conn.Channel = channel
err := conn.Client.Emit("open", channel.Id)
if err != nil {
log.Fatal(err)
}
if len(channel.Filtered) == 0 {
channel.Filtered = loungeMessagesFilter(channel.Messages)
}
if len(channel.Messages) == 1 {
loungeMessagesUpdate(conn)
}
}
func loungeChannelSend(conn *loungeConnection, channel int, text string) {
err := conn.Client.Emit("input", loungeInput{channel, text})
if err != nil {
log.Fatal(err)
}
}
func loungeRegisterEvents(conn *loungeConnection) {
var err error;
err = conn.Client.On("auth:start", func(h *gosocketio.Channel, serverHash int) {
loungeAuthenticate(conn)
})
if err != nil {
log.Fatal(err)
}
err = conn.Client.On("auth:success", func(h *gosocketio.Channel) {
conn.Error = "Authentication succeeded"
connActionTrigger(conn, actionAuthSuccess)
})
if err != nil {
log.Fatal(err)
}
err = conn.Client.On("auth:failed", func(h *gosocketio.Channel) {
conn.Error = "Authentication failed"
connActionTrigger(conn, actionAuthFailed)
})
if err != nil {
log.Fatal(err)
}
err = conn.Client.On("init", func(h *gosocketio.Channel, init loungeInit) {
conn.Token = init.Token
conn.Networks = init.Networks
connActionTrigger(conn, actionInit)
})
if err != nil {
log.Fatal(err)
}
err = conn.Client.On("join", func(h *gosocketio.Channel, join loungeJoin) {
for i := 0; i < len(conn.Networks); i++ {
if conn.Networks[i].Uuid == join.Network {
conn.Networks[i].Channels = append(conn.Networks[i].Channels, join.Channel)
}
}
connActionTrigger(conn, actionJoin)
})
if err != nil {
log.Fatal(err)
}
err = conn.Client.On("part", func(h *gosocketio.Channel, part loungePart) {
if conn.Channel != nil && conn.Channel.Id == part.Channel {
conn.Channel = nil
}
for i := 0; i < len(conn.Networks); i++ {
net := conn.Networks[i]
for i := 0; i < len(net.Channels); i++ {
if net.Channels[i].Id == part.Channel {
channels := net.Channels
channels[i] = channels[len(channels)-1]
net.Channels = channels[:len(channels)-1]
}
}
conn.Networks[i] = net
}
connActionTrigger(conn, actionPart)
})
if err != nil {
log.Fatal(err)
}
err = conn.Client.On("open", func(h *gosocketio.Channel) {
connActionTrigger(conn, actionOpen)
})
if err != nil {
log.Fatal(err)
}
err = conn.Client.On("more", func(h *gosocketio.Channel, more loungeMore) {
channel := loungeFindChannel(conn, more.Channel)
currTime, moreTime := time.Now(), time.Now()
if channel != nil && len(channel.Messages) != 0 && len(more.Messages) != 0 {
currTime, _ = time.Parse(time.RFC3339, channel.Messages[0].Time)
moreTime, _ = time.Parse(time.RFC3339, more.Messages[0].Time)
}
if moreTime.Unix() > currTime.Unix() {
channel.Messages = append(channel.Messages, more.Messages...)
channel.Filtered = append(channel.Filtered, loungeMessagesFilter(more.Messages)...)
} else {
channel.Messages = append(more.Messages, channel.Messages...)
channel.Filtered = append(loungeMessagesFilter(more.Messages), channel.Filtered...)
}
connActionTrigger(conn, actionMore)
})
if err != nil {
log.Fatal(err)
}
err = conn.Client.On("msg", func(h *gosocketio.Channel, msg loungeNewMessage) {
channel := loungeFindChannel(conn, msg.Channel)
if (channel != nil) {
loungeMessageHandle(channel, msg.Message)
}