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event.go
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event.go
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package handlers
import (
"fmt"
"log"
"os"
"regexp"
"strconv"
"strings"
"time"
"github.com/0xAX/notificator"
"github.com/erroneousboat/termui"
"github.com/nlopes/slack"
termbox "github.com/nsf/termbox-go"
"github.com/erroneousboat/slack-term/components"
"github.com/erroneousboat/slack-term/config"
"github.com/erroneousboat/slack-term/context"
"github.com/erroneousboat/slack-term/views"
)
var scrollTimer *time.Timer
var notifyTimer *time.Timer
// actionMap binds specific action names to the function counterparts,
// these action names can then be used to bind them to specific keys
// in the Config.
var actionMap = map[string]func(*context.AppContext){
"space": actionSpace,
"backspace": actionBackSpace,
"delete": actionDelete,
"cursor-right": actionMoveCursorRight,
"cursor-left": actionMoveCursorLeft,
"send": actionSend,
"quit": actionQuit,
"mode-insert": actionInsertMode,
"mode-command": actionCommandMode,
"mode-search": actionSearchMode,
"clear-input": actionClearInput,
"channel-up": actionMoveCursorUpChannels,
"channel-down": actionMoveCursorDownChannels,
"channel-top": actionMoveCursorTopChannels,
"channel-bottom": actionMoveCursorBottomChannels,
"channel-search-next": actionSearchNextChannels,
"channel-search-prev": actionSearchPrevChannels,
"channel-jump": actionJumpChannels,
"thread-up": actionMoveCursorUpThreads,
"thread-down": actionMoveCursorDownThreads,
"chat-up": actionScrollUpChat,
"chat-down": actionScrollDownChat,
"help": actionHelp,
}
// Initialize will start a combination of event handlers and 'background tasks'
func Initialize(ctx *context.AppContext) {
// Keyboard events
eventHandler(ctx)
// RTM incoming events
messageHandler(ctx)
// User presence
go actionSetPresenceAll(ctx)
}
// eventHandler will handle events created by the user
func eventHandler(ctx *context.AppContext) {
go func() {
for {
ctx.EventQueue <- termbox.PollEvent()
}
}()
go func() {
for {
ev := <-ctx.EventQueue
handleTermboxEvents(ctx, ev)
handleMoreTermboxEvents(ctx, ev)
// Place your debugging statements here
if ctx.Debug {
ctx.View.Debug.Println(
"event received",
)
}
}
}()
}
func handleTermboxEvents(ctx *context.AppContext, ev termbox.Event) bool {
switch ev.Type {
case termbox.EventKey:
actionKeyEvent(ctx, ev)
case termbox.EventResize:
actionResizeEvent(ctx, ev)
}
return true
}
func handleMoreTermboxEvents(ctx *context.AppContext, ev termbox.Event) bool {
for {
select {
case ev := <-ctx.EventQueue:
ok := handleTermboxEvents(ctx, ev)
if !ok {
return false
}
default:
return true
}
}
}
// messageHandler will handle events created by the service
func messageHandler(ctx *context.AppContext) {
go func() {
for {
select {
case rtmEvent := <-ctx.Service.RTM.IncomingEvents:
switch ev := rtmEvent.Data.(type) {
case *slack.MessageEvent:
// Construct message
msg, err := ctx.Service.CreateMessageFromMessageEvent(ev, ev.Channel)
if err != nil {
continue
}
// Add message to the selected channel
if ev.Channel == ctx.View.Channels.ChannelItems[ctx.View.Channels.SelectedChannel].ID {
// Get the thread timestamp of the event, we need to
// check the previous message as well, because edited
// message don't have the thread timestamp
var threadTimestamp string
if ev.ThreadTimestamp != "" {
threadTimestamp = ev.ThreadTimestamp
} else if ev.PreviousMessage != nil && ev.PreviousMessage.ThreadTimestamp != "" {
threadTimestamp = ev.PreviousMessage.ThreadTimestamp
} else {
threadTimestamp = ""
}
// When timestamp isn't set this is a thread reply,
// handle as such
if threadTimestamp != "" {
ctx.View.Chat.AddReply(threadTimestamp, msg)
} else if threadTimestamp == "" && ctx.Focus == context.ChatFocus {
ctx.View.Chat.AddMessage(msg)
}
// we (mis)use actionChangeChannel, to rerender, the
// view when a new thread has been started
if ctx.View.Chat.IsNewThread(threadTimestamp) {
actionChangeChannel(ctx)
} else {
termui.Render(ctx.View.Chat)
}
// TODO: set Chat.Offset to 0, to automatically scroll
// down?
}
// Set new message indicator for channel, I'm leaving
// this here because I also want to be notified when
// I'm currently in a channel but not in the terminal
// window (tmux). But only create a notification when
// it comes from someone else but the current user.
if ev.User != ctx.Service.CurrentUserID {
actionNewMessage(ctx, ev)
}
case *slack.PresenceChangeEvent:
actionSetPresence(ctx, ev.User, ev.Presence)
case *slack.RTMError:
ctx.View.Debug.Println(
ev.Error(),
)
}
}
}
}()
}
func actionKeyEvent(ctx *context.AppContext, ev termbox.Event) {
keyStr := getKeyString(ev)
// Get the action name (actionStr) from the key that
// has been pressed. If this is found try to uncover
// the associated function with this key and execute
// it.
actionStr, ok := ctx.Config.KeyMap[ctx.Mode][keyStr]
if ok {
action, ok := actionMap[actionStr]
if ok {
action(ctx)
}
} else {
if ctx.Mode == context.InsertMode && ev.Ch != 0 {
actionInput(ctx.View, ev.Ch)
} else if ctx.Mode == context.SearchMode && ev.Ch != 0 {
actionSearch(ctx, ev.Ch)
}
}
}
func actionResizeEvent(ctx *context.AppContext, ev termbox.Event) {
// When terminal window is too small termui will panic, here
// we won't resize when the terminal window is too small.
if termui.TermWidth() < 25 || termui.TermHeight() < 5 {
return
}
termui.Body.Width = termui.TermWidth()
// Vertical resize components
ctx.View.Channels.List.Height = termui.TermHeight() - ctx.View.Input.Par.Height
ctx.View.Chat.List.Height = termui.TermHeight() - ctx.View.Input.Par.Height
ctx.View.Debug.List.Height = termui.TermHeight() - ctx.View.Input.Par.Height
termui.Body.Align()
termui.Render(termui.Body)
}
func actionRedrawGrid(ctx *context.AppContext, threads bool, debug bool) {
termui.Clear()
termui.Body = termui.NewGrid()
termui.Body.X = 0
termui.Body.Y = 0
termui.Body.BgColor = termui.ThemeAttr("bg")
termui.Body.Width = termui.TermWidth()
columns := []*termui.Row{
termui.NewCol(ctx.Config.SidebarWidth, 0, ctx.View.Channels),
}
if threads && debug {
columns = append(
columns,
[]*termui.Row{
termui.NewCol(ctx.Config.MainWidth-ctx.Config.ThreadsWidth-3, 0, ctx.View.Chat),
termui.NewCol(ctx.Config.ThreadsWidth, 0, ctx.View.Threads),
termui.NewCol(3, 0, ctx.View.Debug),
}...,
)
} else if threads {
columns = append(
columns,
[]*termui.Row{
termui.NewCol(ctx.Config.MainWidth-ctx.Config.ThreadsWidth, 0, ctx.View.Chat),
termui.NewCol(ctx.Config.ThreadsWidth, 0, ctx.View.Threads),
}...,
)
} else if debug {
columns = append(
columns,
[]*termui.Row{
termui.NewCol(ctx.Config.MainWidth-5, 0, ctx.View.Chat),
termui.NewCol(ctx.Config.MainWidth-6, 0, ctx.View.Debug),
}...,
)
} else {
columns = append(
columns,
[]*termui.Row{
termui.NewCol(ctx.Config.MainWidth, 0, ctx.View.Chat),
}...,
)
}
termui.Body.AddRows(
termui.NewRow(columns...),
termui.NewRow(
termui.NewCol(ctx.Config.SidebarWidth, 0, ctx.View.Mode),
termui.NewCol(ctx.Config.MainWidth, 0, ctx.View.Input),
),
)
termui.Body.Align()
termui.Render(termui.Body)
}
func actionInput(view *views.View, key rune) {
view.Input.Insert(key)
termui.Render(view.Input)
}
func actionClearInput(ctx *context.AppContext) {
// Clear input
ctx.View.Input.Clear()
ctx.View.Refresh()
// Set command mode
actionCommandMode(ctx)
}
func actionSpace(ctx *context.AppContext) {
actionInput(ctx.View, ' ')
}
func actionBackSpace(ctx *context.AppContext) {
ctx.View.Input.Backspace()
termui.Render(ctx.View.Input)
}
func actionDelete(ctx *context.AppContext) {
ctx.View.Input.Delete()
termui.Render(ctx.View.Input)
}
func actionMoveCursorRight(ctx *context.AppContext) {
ctx.View.Input.MoveCursorRight()
termui.Render(ctx.View.Input)
}
func actionMoveCursorLeft(ctx *context.AppContext) {
ctx.View.Input.MoveCursorLeft()
termui.Render(ctx.View.Input)
}
func actionSend(ctx *context.AppContext) {
if !ctx.View.Input.IsEmpty() {
// Clear message before sending, to combat
// quick succession of actionSend
message := ctx.View.Input.GetText()
ctx.View.Input.Clear()
termui.Render(ctx.View.Input)
// Send slash command
isCmd, err := ctx.Service.SendCommand(
ctx.View.Channels.ChannelItems[ctx.View.Channels.SelectedChannel].ID,
message,
)
if err != nil {
ctx.View.Debug.Println(
err.Error(),
)
}
// Send message
if !isCmd {
if ctx.Focus == context.ChatFocus {
err := ctx.Service.SendMessage(
ctx.View.Channels.ChannelItems[ctx.View.Channels.SelectedChannel].ID,
message,
)
if err != nil {
ctx.View.Debug.Println(
err.Error(),
)
}
}
if ctx.Focus == context.ThreadFocus {
err := ctx.Service.SendReply(
ctx.View.Channels.ChannelItems[ctx.View.Channels.SelectedChannel].ID,
ctx.View.Threads.ChannelItems[ctx.View.Threads.SelectedChannel].ID,
message,
)
if err != nil {
ctx.View.Debug.Println(
err.Error(),
)
}
}
}
// Clear notification icon if there is any
channelItem := ctx.View.Channels.ChannelItems[ctx.View.Channels.SelectedChannel]
if channelItem.Notification {
ctx.Service.MarkAsRead(channelItem)
ctx.View.Channels.MarkAsRead(ctx.View.Channels.SelectedChannel)
}
termui.Render(ctx.View.Channels)
}
}
// actionSearch will search through the channels based on the users
// input. A time is implemented to make sure the actual searching
// and changing of channels is done when the user's typing is paused.
func actionSearch(ctx *context.AppContext, key rune) {
actionInput(ctx.View, key)
go func() {
if scrollTimer != nil {
scrollTimer.Stop()
}
scrollTimer = time.NewTimer(time.Second / 4)
<-scrollTimer.C
// Only actually search when the time expires
term := ctx.View.Input.GetText()
ctx.View.Channels.Search(term)
actionChangeChannel(ctx)
}()
}
// actionQuit will exit the program by using os.Exit, this is
// done because we are using a custom termui EvtStream. Which
// we won't be able to call termui.StopLoop() on. See main.go
// for the customEvtStream and why this is done.
func actionQuit(ctx *context.AppContext) {
termbox.Close()
os.Exit(0)
}
func actionInsertMode(ctx *context.AppContext) {
ctx.Mode = context.InsertMode
ctx.View.Mode.SetInsertMode()
}
func actionCommandMode(ctx *context.AppContext) {
ctx.Mode = context.CommandMode
ctx.View.Mode.SetCommandMode()
}
func actionSearchMode(ctx *context.AppContext) {
ctx.Mode = context.SearchMode
ctx.View.Mode.SetSearchMode()
}
func actionGetMessages(ctx *context.AppContext) {
msgs, _, err := ctx.Service.GetMessages(
ctx.View.Channels.ChannelItems[ctx.View.Channels.SelectedChannel].ID,
ctx.View.Chat.GetMaxItems(),
)
if err != nil {
termbox.Close()
log.Println(err)
os.Exit(0)
}
ctx.View.Chat.SetMessages(msgs)
termui.Render(ctx.View.Chat)
}
// actionMoveCursorUpChannels will execute the actionChangeChannel
// function. A timer is implemented to support fast scrolling through
// the list without executing the actionChangeChannel event
func actionMoveCursorUpChannels(ctx *context.AppContext) {
go func() {
if scrollTimer != nil {
scrollTimer.Stop()
}
ctx.View.Channels.MoveCursorUp()
termui.Render(ctx.View.Channels)
scrollTimer = time.NewTimer(time.Second / 4)
<-scrollTimer.C
// Only actually change channel when the timer expires
actionChangeChannel(ctx)
}()
}
// actionMoveCursorDownChannels will execute the actionChangeChannel
// function. A timer is implemented to support fast scrolling through
// the list without executing the actionChangeChannel event
func actionMoveCursorDownChannels(ctx *context.AppContext) {
go func() {
if scrollTimer != nil {
scrollTimer.Stop()
}
ctx.View.Channels.MoveCursorDown()
termui.Render(ctx.View.Channels)
scrollTimer = time.NewTimer(time.Second / 4)
<-scrollTimer.C
// Only actually change channel when the timer expires
actionChangeChannel(ctx)
}()
}
func actionMoveCursorTopChannels(ctx *context.AppContext) {
ctx.View.Channels.MoveCursorTop()
actionChangeChannel(ctx)
}
func actionMoveCursorBottomChannels(ctx *context.AppContext) {
ctx.View.Channels.MoveCursorBottom()
actionChangeChannel(ctx)
}
func actionSearchNextChannels(ctx *context.AppContext) {
ctx.View.Channels.SearchNext()
actionChangeChannel(ctx)
}
func actionSearchPrevChannels(ctx *context.AppContext) {
ctx.View.Channels.SearchPrev()
actionChangeChannel(ctx)
}
func actionJumpChannels(ctx *context.AppContext) {
ctx.View.Channels.Jump()
actionChangeChannel(ctx)
}
func actionChangeChannel(ctx *context.AppContext) {
// Clear messages from Chat pane
ctx.View.Chat.ClearMessages()
// Get messages of the SelectedChannel, and get the count of messages
// that fit into the Chat component
msgs, threads, err := ctx.Service.GetMessages(
ctx.View.Channels.ChannelItems[ctx.View.Channels.SelectedChannel].ID,
ctx.View.Chat.GetMaxItems(),
)
if err != nil {
termbox.Close()
log.Println(err)
os.Exit(0)
}
// Set messages for the channel
ctx.View.Chat.SetMessages(msgs)
// Set the threads identifiers in the threads pane
var haveThreads bool
if len(threads) > 0 {
haveThreads = true
// Make the first thread the current Channel
ctx.View.Threads.SetChannels(
append(
[]components.ChannelItem{ctx.View.Channels.GetSelectedChannel()},
threads...,
),
)
// Reset position of SelectedChannel
ctx.View.Threads.MoveCursorTop()
}
// Set channel name for the Chat pane
ctx.View.Chat.SetBorderLabel(
ctx.View.Channels.ChannelItems[ctx.View.Channels.SelectedChannel].GetChannelName(),
)
// Clear notification icon if there is any
channelItem := ctx.View.Channels.ChannelItems[ctx.View.Channels.SelectedChannel]
if channelItem.Notification {
ctx.Service.MarkAsRead(channelItem)
ctx.View.Channels.MarkAsRead(ctx.View.Channels.SelectedChannel)
}
// Redraw grid, necessary when threads and/or debug is set. We will redraw
// the grid when there are threads, or we just came from a thread and went
// to a channel without threads. Hence the clearing of ChannelItems of
// Threads.
if haveThreads {
actionRedrawGrid(ctx, haveThreads, ctx.Debug)
} else if !haveThreads && len(ctx.View.Threads.ChannelItems) > 0 {
ctx.View.Threads.SetChannels([]components.ChannelItem{})
actionRedrawGrid(ctx, haveThreads, ctx.Debug)
} else {
termui.Render(ctx.View.Threads)
termui.Render(ctx.View.Channels)
termui.Render(ctx.View.Chat)
}
// Set focus, necessary to know when replying to thread or chat
ctx.Focus = context.ChatFocus
}
func actionChangeThread(ctx *context.AppContext) {
// Clear messages from Chat pane
ctx.View.Chat.ClearMessages()
// The first channel in the Thread list is current Channel. Set context
// Focus and messages accordingly.
var err error
msgs := []components.Message{}
if ctx.View.Threads.SelectedChannel == 0 {
ctx.Focus = context.ChatFocus
msgs, _, err = ctx.Service.GetMessages(
ctx.View.Channels.ChannelItems[ctx.View.Channels.SelectedChannel].ID,
ctx.View.Chat.GetMaxItems(),
)
if err != nil {
termbox.Close()
log.Println(err)
os.Exit(0)
}
} else {
ctx.Focus = context.ThreadFocus
msgs, err = ctx.Service.GetMessageByID(
ctx.View.Threads.ChannelItems[ctx.View.Threads.SelectedChannel].ID,
ctx.View.Channels.ChannelItems[ctx.View.Channels.SelectedChannel].ID,
)
if err != nil {
termbox.Close()
log.Println(err)
os.Exit(0)
}
}
// Set messages for the channel
ctx.View.Chat.SetMessages(msgs)
termui.Render(ctx.View.Channels)
termui.Render(ctx.View.Threads)
termui.Render(ctx.View.Chat)
}
func actionMoveCursorUpThreads(ctx *context.AppContext) {
go func() {
if scrollTimer != nil {
scrollTimer.Stop()
}
ctx.View.Threads.MoveCursorUp()
termui.Render(ctx.View.Threads)
scrollTimer = time.NewTimer(time.Second / 4)
<-scrollTimer.C
// Only actually change channel when the timer expires
actionChangeThread(ctx)
}()
}
func actionMoveCursorDownThreads(ctx *context.AppContext) {
go func() {
if scrollTimer != nil {
scrollTimer.Stop()
}
ctx.View.Threads.MoveCursorDown()
termui.Render(ctx.View.Threads)
scrollTimer = time.NewTimer(time.Second / 4)
<-scrollTimer.C
// Only actually change thread when the timer expires
actionChangeThread(ctx)
}()
}
// actionNewMessage will set the new message indicator for a channel, and
// if configured will also display a desktop notification
func actionNewMessage(ctx *context.AppContext, ev *slack.MessageEvent) {
ctx.View.Channels.MarkAsUnread(ev.Channel)
termui.Render(ctx.View.Channels)
// Terminal bell
fmt.Print("\a")
// Desktop notification
if ctx.Config.Notify == config.NotifyMention {
if isMention(ctx, ev) {
createNotifyMessage(ctx, ev)
}
} else if ctx.Config.Notify == config.NotifyAll {
createNotifyMessage(ctx, ev)
}
}
func actionSetPresence(ctx *context.AppContext, channelID string, presence string) {
ctx.View.Channels.SetPresence(channelID, presence)
termui.Render(ctx.View.Channels)
}
// actionPresenceAll will set the presence of the user list. Because the
// requests to the endpoint are rate limited we implement a timeout here.
func actionSetPresenceAll(ctx *context.AppContext) {
for _, chn := range ctx.Service.Conversations {
if chn.IsIM {
presence, err := ctx.Service.GetUserPresence(chn.User)
if err != nil {
presence = "away"
}
ctx.View.Channels.SetPresence(chn.ID, presence)
termui.Render(ctx.View.Channels)
time.Sleep(1200 * time.Millisecond)
}
}
}
func actionScrollUpChat(ctx *context.AppContext) {
ctx.View.Chat.ScrollUp()
termui.Render(ctx.View.Chat)
}
func actionScrollDownChat(ctx *context.AppContext) {
ctx.View.Chat.ScrollDown()
termui.Render(ctx.View.Chat)
}
func actionHelp(ctx *context.AppContext) {
ctx.View.Chat.ClearMessages()
ctx.View.Chat.Help(ctx.Usage, ctx.Config)
termui.Render(ctx.View.Chat)
}
// GetKeyString will return a string that resembles the key event from
// termbox. This is blatanly copied from termui because it is an unexported
// function.
//
// See:
// - https://github.com/gizak/termui/blob/a7e3aeef4cdf9fa2edb723b1541cb69b7bb089ea/events.go#L31-L72
// - https://github.com/nsf/termbox-go/blob/master/api_common.go
func getKeyString(e termbox.Event) string {
var ek string
k := string(e.Ch)
pre := ""
mod := ""
if e.Mod == termbox.ModAlt {
mod = "M-"
}
if e.Ch == 0 {
if e.Key > 0xFFFF-12 {
k = "<f" + strconv.Itoa(0xFFFF-int(e.Key)+1) + ">"
} else if e.Key > 0xFFFF-25 {
ks := []string{"<insert>", "<delete>", "<home>", "<end>", "<previous>", "<next>", "<up>", "<down>", "<left>", "<right>"}
k = ks[0xFFFF-int(e.Key)-12]
}
if e.Key <= 0x7F {
pre = "C-"
k = string('a' - 1 + int(e.Key))
kmap := map[termbox.Key][2]string{
termbox.KeyCtrlSpace: {"C-", "<space>"},
termbox.KeyBackspace: {"", "<backspace>"},
termbox.KeyTab: {"", "<tab>"},
termbox.KeyEnter: {"", "<enter>"},
termbox.KeyEsc: {"", "<escape>"},
termbox.KeyCtrlBackslash: {"C-", "\\"},
termbox.KeyCtrlSlash: {"C-", "/"},
termbox.KeySpace: {"", "<space>"},
termbox.KeyCtrl8: {"C-", "8"},
}
if sk, ok := kmap[e.Key]; ok {
pre = sk[0]
k = sk[1]
}
}
}
ek = pre + mod + k
return ek
}
// isMention check if the message event either contains a
// mention or is posted on an IM channel.
func isMention(ctx *context.AppContext, ev *slack.MessageEvent) bool {
channel := ctx.View.Channels.ChannelItems[ctx.View.Channels.FindChannel(ev.Channel)]
if channel.Type == components.ChannelTypeIM {
return true
}
// Mentions have the following format:
// <@U12345|erroneousboat>
// <@U12345>
r := regexp.MustCompile(`\<@(\w+\|*\w+)\>`)
matches := r.FindAllString(ev.Text, -1)
for _, match := range matches {
if strings.Contains(match, ctx.Service.CurrentUserID) {
return true
}
}
return false
}
func createNotifyMessage(ctx *context.AppContext, ev *slack.MessageEvent) {
go func() {
if notifyTimer != nil {
notifyTimer.Stop()
}
// Only actually notify when time expires
notifyTimer = time.NewTimer(time.Second * 2)
<-notifyTimer.C
var message string
channel := ctx.View.Channels.ChannelItems[ctx.View.Channels.FindChannel(ev.Channel)]
switch channel.Type {
case components.ChannelTypeChannel:
message = fmt.Sprintf("Message received on channel: %s", channel.Name)
case components.ChannelTypeGroup:
message = fmt.Sprintf("Message received in group: %s", channel.Name)
case components.ChannelTypeIM:
message = fmt.Sprintf("Message received from: %s", channel.Name)
default:
message = fmt.Sprintf("Message received from: %s", channel.Name)
}
ctx.Notify.Push("slack-term", message, "", notificator.UR_NORMAL)
}()
}