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matterbridge/bridge/telegram/telegram.go
2018-03-17 22:54:54 +01:00

411 lines
11 KiB
Go

package btelegram
import (
"regexp"
"strconv"
"strings"
"github.com/42wim/matterbridge/bridge"
"github.com/42wim/matterbridge/bridge/config"
"github.com/42wim/matterbridge/bridge/helper"
"github.com/go-telegram-bot-api/telegram-bot-api"
)
type Btelegram struct {
c *tgbotapi.BotAPI
*bridge.Config
avatarMap map[string]string // keep cache of userid and avatar sha
}
func New(cfg *bridge.Config) bridge.Bridger {
return &Btelegram{Config: cfg, avatarMap: make(map[string]string)}
}
func (b *Btelegram) Connect() error {
var err error
b.Log.Info("Connecting")
b.c, err = tgbotapi.NewBotAPI(b.GetString("Token"))
if err != nil {
b.Log.Debugf("%#v", err)
return err
}
u := tgbotapi.NewUpdate(0)
u.Timeout = 60
updates, err := b.c.GetUpdatesChan(u)
if err != nil {
b.Log.Debugf("%#v", err)
return err
}
b.Log.Info("Connection succeeded")
go b.handleRecv(updates)
return nil
}
func (b *Btelegram) Disconnect() error {
return nil
}
func (b *Btelegram) JoinChannel(channel config.ChannelInfo) error {
return nil
}
func (b *Btelegram) Send(msg config.Message) (string, error) {
b.Log.Debugf("=> Receiving %#v", msg)
// get the chatid
chatid, err := strconv.ParseInt(msg.Channel, 10, 64)
if err != nil {
return "", err
}
// map the file SHA to our user (caches the avatar)
if msg.Event == config.EVENT_AVATAR_DOWNLOAD {
return b.cacheAvatar(&msg)
}
if b.GetString("MessageFormat") == "HTML" {
msg.Text = makeHTML(msg.Text)
}
// Delete message
if msg.Event == config.EVENT_MSG_DELETE {
if msg.ID == "" {
return "", nil
}
msgid, err := strconv.Atoi(msg.ID)
if err != nil {
return "", err
}
_, err = b.c.DeleteMessage(tgbotapi.DeleteMessageConfig{ChatID: chatid, MessageID: msgid})
return "", err
}
// Upload a file if it exists
if msg.Extra != nil {
for _, rmsg := range helper.HandleExtra(&msg, b.General) {
b.sendMessage(chatid, rmsg.Username, rmsg.Text)
}
// check if we have files to upload (from slack, telegram or mattermost)
if len(msg.Extra["file"]) > 0 {
b.handleUploadFile(&msg, chatid)
}
}
// edit the message if we have a msg ID
if msg.ID != "" {
msgid, err := strconv.Atoi(msg.ID)
if err != nil {
return "", err
}
m := tgbotapi.NewEditMessageText(chatid, msgid, msg.Username+msg.Text)
if b.GetString("MessageFormat") == "HTML" {
b.Log.Debug("Using mode HTML")
m.ParseMode = tgbotapi.ModeHTML
}
if b.GetString("MessageFormat") == "Markdown" {
b.Log.Debug("Using mode markdown")
m.ParseMode = tgbotapi.ModeMarkdown
}
_, err = b.c.Send(m)
if err != nil {
return "", err
}
return "", nil
}
// Post normal message
return b.sendMessage(chatid, msg.Username, msg.Text)
}
func (b *Btelegram) handleRecv(updates <-chan tgbotapi.Update) {
for update := range updates {
b.Log.Debugf("== Receiving event: %#v", update.Message)
if update.Message == nil && update.ChannelPost == nil {
b.Log.Error("Getting nil messages, this shouldn't happen.")
continue
}
var message *tgbotapi.Message
rmsg := config.Message{Account: b.Account, Extra: make(map[string][]interface{})}
// handle channels
if update.ChannelPost != nil {
message = update.ChannelPost
}
// edited channel message
if update.EditedChannelPost != nil && !b.GetBool("EditDisable") {
message = update.EditedChannelPost
rmsg.Text = rmsg.Text + message.Text + b.GetString("EditSuffix")
}
// handle groups
if update.Message != nil {
message = update.Message
}
// edited group message
if update.EditedMessage != nil && !b.GetBool("EditDisable") {
message = update.EditedMessage
rmsg.Text = rmsg.Text + message.Text + b.GetString("EditSuffix")
}
// set the ID's from the channel or group message
rmsg.ID = strconv.Itoa(message.MessageID)
rmsg.UserID = strconv.Itoa(message.From.ID)
rmsg.Channel = strconv.FormatInt(message.Chat.ID, 10)
// handle username
if message.From != nil {
if b.GetBool("UseFirstName") {
rmsg.Username = message.From.FirstName
}
if rmsg.Username == "" {
rmsg.Username = message.From.UserName
if rmsg.Username == "" {
rmsg.Username = message.From.FirstName
}
}
rmsg.Text += message.Text
// only download avatars if we have a place to upload them (configured mediaserver)
if b.General.MediaServerUpload != "" {
b.handleDownloadAvatar(message.From.ID, rmsg.Channel)
}
}
// if we really didn't find a username, set it to unknown
if rmsg.Username == "" {
rmsg.Username = "unknown"
}
// handle any downloads
err := b.handleDownload(message, &rmsg)
if err != nil {
b.Log.Errorf("download failed: %s", err)
}
// handle forwarded messages
if message.ForwardFrom != nil {
usernameForward := ""
if b.GetBool("UseFirstName") {
usernameForward = message.ForwardFrom.FirstName
}
if usernameForward == "" {
usernameForward = message.ForwardFrom.UserName
if usernameForward == "" {
usernameForward = message.ForwardFrom.FirstName
}
}
if usernameForward == "" {
usernameForward = "unknown"
}
rmsg.Text = "Forwarded from " + usernameForward + ": " + rmsg.Text
}
// quote the previous message
if message.ReplyToMessage != nil {
usernameReply := ""
if message.ReplyToMessage.From != nil {
if b.GetBool("UseFirstName") {
usernameReply = message.ReplyToMessage.From.FirstName
}
if usernameReply == "" {
usernameReply = message.ReplyToMessage.From.UserName
if usernameReply == "" {
usernameReply = message.ReplyToMessage.From.FirstName
}
}
}
if usernameReply == "" {
usernameReply = "unknown"
}
rmsg.Text = rmsg.Text + " (re @" + usernameReply + ":" + message.ReplyToMessage.Text + ")"
}
if rmsg.Text != "" || len(rmsg.Extra) > 0 {
rmsg.Avatar = helper.GetAvatar(b.avatarMap, strconv.Itoa(message.From.ID), b.General)
b.Log.Debugf("<= Sending message from %s on %s to gateway", rmsg.Username, b.Account)
b.Log.Debugf("<= Message is %#v", rmsg)
b.Remote <- rmsg
}
}
}
func (b *Btelegram) getFileDirectURL(id string) string {
res, err := b.c.GetFileDirectURL(id)
if err != nil {
return ""
}
return res
}
// handleDownloadAvatar downloads the avatar of userid from channel
// sends a EVENT_AVATAR_DOWNLOAD message to the gateway if successful.
// logs an error message if it fails
func (b *Btelegram) handleDownloadAvatar(userid int, channel string) {
rmsg := config.Message{Username: "system", Text: "avatar", Channel: channel, Account: b.Account, UserID: strconv.Itoa(userid), Event: config.EVENT_AVATAR_DOWNLOAD, Extra: make(map[string][]interface{})}
if _, ok := b.avatarMap[strconv.Itoa(userid)]; !ok {
photos, err := b.c.GetUserProfilePhotos(tgbotapi.UserProfilePhotosConfig{UserID: userid, Limit: 1})
if err != nil {
b.Log.Errorf("Userprofile download failed for %#v %s", userid, err)
}
if len(photos.Photos) > 0 {
photo := photos.Photos[0][0]
url := b.getFileDirectURL(photo.FileID)
name := strconv.Itoa(userid) + ".png"
b.Log.Debugf("trying to download %#v fileid %#v with size %#v", name, photo.FileID, photo.FileSize)
err := helper.HandleDownloadSize(b.Log, &rmsg, name, int64(photo.FileSize), b.General)
if err != nil {
b.Log.Error(err)
return
}
data, err := helper.DownloadFile(url)
if err != nil {
b.Log.Errorf("download %s failed %#v", url, err)
return
}
helper.HandleDownloadData(b.Log, &rmsg, name, rmsg.Text, "", data, b.General)
b.Remote <- rmsg
}
}
}
// handleDownloadFile handles file download
func (b *Btelegram) handleDownload(message *tgbotapi.Message, rmsg *config.Message) error {
size := 0
var url, name, text string
if message.Sticker != nil {
v := message.Sticker
size = v.FileSize
url = b.getFileDirectURL(v.FileID)
urlPart := strings.Split(url, "/")
name = urlPart[len(urlPart)-1]
if !strings.HasSuffix(name, ".webp") {
name = name + ".webp"
}
text = " " + url
}
if message.Video != nil {
v := message.Video
size = v.FileSize
url = b.getFileDirectURL(v.FileID)
urlPart := strings.Split(url, "/")
name = urlPart[len(urlPart)-1]
text = " " + url
}
if message.Photo != nil {
photos := *message.Photo
size = photos[len(photos)-1].FileSize
url = b.getFileDirectURL(photos[len(photos)-1].FileID)
urlPart := strings.Split(url, "/")
name = urlPart[len(urlPart)-1]
text = " " + url
}
if message.Document != nil {
v := message.Document
size = v.FileSize
url = b.getFileDirectURL(v.FileID)
name = v.FileName
text = " " + v.FileName + " : " + url
}
if message.Voice != nil {
v := message.Voice
size = v.FileSize
url = b.getFileDirectURL(v.FileID)
urlPart := strings.Split(url, "/")
name = urlPart[len(urlPart)-1]
text = " " + url
if !strings.HasSuffix(name, ".ogg") {
name = name + ".ogg"
}
}
if message.Audio != nil {
v := message.Audio
size = v.FileSize
url = b.getFileDirectURL(v.FileID)
urlPart := strings.Split(url, "/")
name = urlPart[len(urlPart)-1]
text = " " + url
}
// if name is empty we didn't match a thing to download
if name == "" {
return nil
}
// use the URL instead of native upload
if b.GetBool("UseInsecureURL") {
b.Log.Debugf("Setting message text to :%s", text)
rmsg.Text = rmsg.Text + text
return nil
}
// if we have a file attached, download it (in memory) and put a pointer to it in msg.Extra
err := helper.HandleDownloadSize(b.Log, rmsg, name, int64(size), b.General)
if err != nil {
return err
}
data, err := helper.DownloadFile(url)
if err != nil {
return err
}
helper.HandleDownloadData(b.Log, rmsg, name, message.Caption, "", data, b.General)
return nil
}
// handleUploadFile handles native upload of files
func (b *Btelegram) handleUploadFile(msg *config.Message, chatid int64) (string, error) {
var c tgbotapi.Chattable
for _, f := range msg.Extra["file"] {
fi := f.(config.FileInfo)
file := tgbotapi.FileBytes{fi.Name, *fi.Data}
re := regexp.MustCompile(".(jpg|png)$")
if re.MatchString(fi.Name) {
c = tgbotapi.NewPhotoUpload(chatid, file)
} else {
c = tgbotapi.NewDocumentUpload(chatid, file)
}
_, err := b.c.Send(c)
if err != nil {
b.Log.Errorf("file upload failed: %#v", err)
}
if fi.Comment != "" {
b.sendMessage(chatid, msg.Username, fi.Comment)
}
}
return "", nil
}
func (b *Btelegram) sendMessage(chatid int64, username, text string) (string, error) {
m := tgbotapi.NewMessage(chatid, "")
m.Text = username + text
if b.GetString("MessageFormat") == "HTML" {
b.Log.Debug("Using mode HTML")
m.Text = username + text
m.ParseMode = tgbotapi.ModeHTML
}
if b.GetString("MessageFormat") == "Markdown" {
b.Log.Debug("Using mode markdown")
m.ParseMode = tgbotapi.ModeMarkdown
}
res, err := b.c.Send(m)
if err != nil {
return "", err
}
return strconv.Itoa(res.MessageID), nil
}
func (b *Btelegram) cacheAvatar(msg *config.Message) (string, error) {
fi := msg.Extra["file"][0].(config.FileInfo)
/* if we have a sha we have successfully uploaded the file to the media server,
so we can now cache the sha */
if fi.SHA != "" {
b.Log.Debugf("Added %s to %s in avatarMap", fi.SHA, msg.UserID)
b.avatarMap[msg.UserID] = fi.SHA
}
return "", nil
}