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package bwhatsapp
import (
"fmt"
"mime"
"strings"
"time"
"github.com/42wim/matterbridge/bridge/config"
"github.com/42wim/matterbridge/bridge/helper"
"github.com/Rhymen/go-whatsapp"
"github.com/jpillora/backoff"
)
/*
Implement handling messages coming from WhatsApp
Check:
- https://github.com/Rhymen/go-whatsapp#add-message-handlers
- https://github.com/Rhymen/go-whatsapp/blob/master/handler.go
- https://github.com/tulir/mautrix-whatsapp/tree/master/whatsapp-ext for more advanced command handling
*/
// HandleError received from WhatsApp
func (b *Bwhatsapp) HandleError(err error) {
// ignore received invalid data errors. https://github.com/42wim/matterbridge/issues/843
if strings.Contains(err.Error(), "error processing data: received invalid data") {
return
}
switch err.(type) {
case *whatsapp.ErrConnectionClosed, *whatsapp.ErrConnectionFailed:
b.reconnect(err)
default:
switch err {
case whatsapp.ErrConnectionTimeout:
b.reconnect(err)
default:
b.Log.Errorf("%v", err)
}
}
}
func (b *Bwhatsapp) reconnect(err error) {
bf := &backoff.Backoff{
Min: time.Second,
Max: 5 * time.Minute,
Jitter: true,
}
for {
d := bf.Duration()
b.Log.Errorf("Connection failed, underlying error: %v", err)
b.Log.Infof("Waiting %s...", d)
time.Sleep(d)
b.Log.Info("Reconnecting...")
err := b.conn.Restore()
if err == nil {
bf.Reset()
return
}
}
}
// HandleTextMessage sent from WhatsApp, relay it to the brige
func (b *Bwhatsapp) HandleTextMessage(message whatsapp.TextMessage) {
if message.Info.FromMe { // || !strings.Contains(strings.ToLower(message.Text), "@echo") {
return
}
// whatsapp sends last messages to show context , cut them
if message.Info.Timestamp < b.startedAt {
return
}
messageTime := time.Unix(int64(message.Info.Timestamp), 0) // TODO check how behaves between timezones
groupJID := message.Info.RemoteJid
senderJID := message.Info.SenderJid
if len(senderJID) == 0 {
// TODO workaround till https://github.com/Rhymen/go-whatsapp/issues/86 resolved
senderJID = *message.Info.Source.Participant
}
// translate sender's JID to the nicest username we can get
senderName := b.getSenderName(senderJID)
if senderName == "" {
senderName = "Someone" // don't expose telephone number
}
extText := message.Info.Source.Message.ExtendedTextMessage
if extText != nil && extText.ContextInfo != nil && extText.ContextInfo.MentionedJid != nil {
// handle user mentions
for _, mentionedJID := range extText.ContextInfo.MentionedJid {
numberAndSuffix := strings.SplitN(mentionedJID, "@", 2)
// mentions comes as telephone numbers and we don't want to expose it to other bridges
// replace it with something more meaninful to others
mention := b.getSenderNotify(numberAndSuffix[0] + "@s.whatsapp.net")
if mention == "" {
mention = "someone"
}
message.Text = strings.Replace(message.Text, "@"+numberAndSuffix[0], "@"+mention, 1)
}
}
b.Log.Debugf("<= Sending message from %s on %s to gateway", senderJID, b.Account)
rmsg := config.Message{
UserID: senderJID,
Username: senderName,
Text: message.Text,
Timestamp: messageTime,
Channel: groupJID,
Account: b.Account,
Protocol: b.Protocol,
Extra: make(map[string][]interface{}),
// ParentID: TODO, // TODO handle thread replies // map from Info.QuotedMessageID string
// Event string `json:"event"`
// Gateway string // will be added during message processing
ID: message.Info.Id}
if avatarURL, exists := b.userAvatars[senderJID]; exists {
rmsg.Avatar = avatarURL
}
b.Log.Debugf("<= Message is %#v", rmsg)
b.Remote <- rmsg
}
// HandleImageMessage sent from WhatsApp, relay it to the brige
func (b *Bwhatsapp) HandleImageMessage(message whatsapp.ImageMessage) {
if message.Info.FromMe { // || !strings.Contains(strings.ToLower(message.Text), "@echo") {
return
}
// whatsapp sends last messages to show context , cut them
if message.Info.Timestamp < b.startedAt {
return
}
messageTime := time.Unix(int64(message.Info.Timestamp), 0) // TODO check how behaves between timezones
groupJID := message.Info.RemoteJid
senderJID := message.Info.SenderJid
// if len(senderJid) == 0 {
// // TODO workaround till https://github.com/Rhymen/go-whatsapp/issues/86 resolved
// senderJid = *message.Info.Source.Participant
// }
// translate sender's Jid to the nicest username we can get
senderName := b.getSenderName(senderJID)
if senderName == "" {
senderName = "Someone" // don't expose telephone number
}
b.Log.Debugf("<= Sending message from %s on %s to gateway", senderJID, b.Account)
rmsg := config.Message{
UserID: senderJID,
Username: senderName,
Timestamp: messageTime,
Channel: groupJID,
Account: b.Account,
Protocol: b.Protocol,
Extra: make(map[string][]interface{}),
// ParentID: TODO, // TODO handle thread replies // map from Info.QuotedMessageID string
// Event string `json:"event"`
// Gateway string // will be added during message processing
ID: message.Info.Id}
if avatarURL, exists := b.userAvatars[senderJID]; exists {
rmsg.Avatar = avatarURL
}
// Download and unencrypt content
data, err := message.Download()
if err != nil {
b.Log.Errorf("%v", err)
return
}
// Get file extension by mimetype
fileExt, err := mime.ExtensionsByType(message.Type)
if err != nil {
b.Log.Errorf("%v", err)
return
}
filename := fmt.Sprintf("%v%v", message.Info.Id, fileExt[0])
b.Log.Debugf("<= Image downloaded and unencrypted")
// Move file to bridge storage
helper.HandleDownloadData(b.Log, &rmsg, filename, message.Caption, "", &data, b.General)
b.Log.Debugf("<= Image Message is %#v", rmsg)
b.Remote <- rmsg
}
//func (b *Bwhatsapp) HandleVideoMessage(message whatsapp.VideoMessage) {
// fmt.Println(message) // TODO implement
//}
//
//func (b *Bwhatsapp) HandleJsonMessage(message string) {
// fmt.Println(message) // TODO implement
//}
// TODO HandleRawMessage
// TODO HandleAudioMessage
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