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Download (and upload) avatar images from mattermost and telegram when mediaserver is configured. Closes #362

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An extra avatarMap (cache) is created for mattermost and telegram.
If MediaServerUpload is configured, the avatar images of users are downloaded the first time a
user sends a message.
If this download succeeds a message with EVENT_AVATAR_DOWNLOAD is sent to the originating protocol.
This message also contains a SHA field (in msg.Extra["file"]), if this is not empty, the sha will
be added to the avatarMap. (so we now have a userid-sha cache)

Next time this user sends a message, the MediaServerUpload/sha/userid.png URL will be used as the
avatar field.
This commit is contained in:
Wim
2018-02-20 00:54:35 +01:00
parent f58be0d1c1
commit 7886f05e88
5 changed files with 129 additions and 10 deletions
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56
bridge/telegram/telegram.go
View File

@ -14,6 +14,7 @@ import (
type Btelegram struct {
c *tgbotapi.BotAPI
*config.BridgeConfig
avatarMap map[string]string // keep cache of userid and avatar sha
}
var flog *log.Entry
@ -24,7 +25,7 @@ func init() {
}
func New(cfg *config.BridgeConfig) *Btelegram {
return &Btelegram{BridgeConfig: cfg}
return &Btelegram{BridgeConfig: cfg, avatarMap: make(map[string]string)}
}
func (b *Btelegram) Connect() error {
@ -63,6 +64,18 @@ func (b *Btelegram) Send(msg config.Message) (string, error) {
return "", err
}
// map the file SHA to our user (caches the avatar)
if msg.Event == config.EVENT_AVATAR_DOWNLOAD {
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 != "" {
flog.Debugf("Added %s to %s in avatarMap", fi.SHA, msg.UserID)
b.avatarMap[msg.UserID] = fi.SHA
}
return "", nil
}
if b.Config.MessageFormat == "HTML" {
msg.Text = makeHTML(msg.Text)
}
@ -173,6 +186,10 @@ func (b *Btelegram) handleRecv(updates <-chan tgbotapi.Update) {
}
text = message.Text
channel = strconv.FormatInt(message.Chat.ID, 10)
// only download avatars if we have a place to upload them (configured mediaserver)
if b.General.MediaServerUpload != "" {
b.handleDownloadAvatar(message.From.ID, channel)
}
}
if username == "" {
@ -235,8 +252,9 @@ func (b *Btelegram) handleRecv(updates <-chan tgbotapi.Update) {
}
if text != "" || len(fmsg.Extra) > 0 {
avatar := helper.GetAvatar(b.avatarMap, strconv.Itoa(message.From.ID), b.General)
flog.Debugf("Sending message from %s on %s to gateway", username, b.Account)
msg := config.Message{Username: username, Text: text, Channel: channel, Account: b.Account, UserID: strconv.Itoa(message.From.ID), ID: strconv.Itoa(message.MessageID), Extra: fmsg.Extra}
msg := config.Message{Username: username, Text: text, Channel: channel, Account: b.Account, UserID: strconv.Itoa(message.From.ID), ID: strconv.Itoa(message.MessageID), Extra: fmsg.Extra, Avatar: avatar}
flog.Debugf("Message is %#v", msg)
b.Remote <- msg
}
@ -251,6 +269,39 @@ func (b *Btelegram) getFileDirectURL(id string) string {
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) {
msg := 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 {
flog.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"
flog.Debugf("trying to download %#v fileid %#v with size %#v", name, photo.FileID, photo.FileSize)
if photo.FileSize <= b.General.MediaDownloadSize {
data, err := helper.DownloadFile(url)
if err != nil {
flog.Errorf("download %s failed %#v", url, err)
} else {
flog.Debugf("download OK %#v %#v %#v", name, len(*data), len(url))
msg.Extra["file"] = append(msg.Extra["file"], config.FileInfo{Name: name, Data: data, Avatar: true})
flog.Debugf("Sending avatar download message from %#v on %s to gateway", userid, b.Account)
flog.Debugf("Message is %#v", msg)
b.Remote <- msg
}
} else {
flog.Errorf("File %#v to large to download (%#v). MediaDownloadSize is %#v", name, photo.FileSize, b.General.MediaDownloadSize)
}
}
}
}
func (b *Btelegram) handleDownload(file interface{}, comment string, msg *config.Message) {
size := 0
url := ""
@ -311,7 +362,6 @@ func (b *Btelegram) handleDownload(file interface{}, comment string, msg *config
return
}
// if we have a file attached, download it (in memory) and put a pointer to it in msg.Extra
// limit to 1MB for now
flog.Debugf("trying to download %#v fileid %#v with size %#v", name, fileid, size)
if size <= b.General.MediaDownloadSize {
data, err := helper.DownloadFile(url)