Relay attachments from mattermost to slack (slack). Closes #260

bridge/config/config.go

@@ -29,6 +29,7 @@ type Message struct {
 	Gateway   string    `json:"gateway"`
 	Timestamp time.Time `json:"timestamp"`
 	ID        string    `json:"id"`
+	Extra     []interface{}
 }
 
 type ChannelInfo struct {

bridge/mattermost/mattermost.go

@@ -26,6 +26,7 @@ type MMMessage struct {
 	UserID   string
 	ID       string
 	Event    string
+	Extra    []interface{}
 }
 
 type Bmattermost struct {
@@ -195,7 +196,7 @@ func (b *Bmattermost) handleMatter() {
 		go b.handleMatterClient(mchan)
 	}
 	for message := range mchan {
-		rmsg := config.Message{Username: message.Username, Channel: message.Channel, Account: b.Account, UserID: message.UserID, ID: message.ID, Event: message.Event}
+		rmsg := config.Message{Username: message.Username, Channel: message.Channel, Account: b.Account, UserID: message.UserID, ID: message.ID, Event: message.Event, Extra: message.Extra}
 		text, ok := b.replaceAction(message.Text)
 		if ok {
 			rmsg.Event = config.EVENT_USER_ACTION
@@ -220,11 +221,17 @@ func (b *Bmattermost) handleMatterClient(mchan chan *MMMessage) {
 		if (message.Raw.Event == "post_edited") && b.Config.EditDisable {
 			continue
 		}
+
+		m := &MMMessage{}
+
 		props := message.Post.Props
 		if props != nil {
 			if _, ok := props["override_username"].(string); ok {
 				message.Username = props["override_username"].(string)
 			}
+			if _, ok := props["attachments"].([]interface{}); ok {
+				m.Extra = props["attachments"].([]interface{})
+			}
 		}
 		// do not post our own messages back to irc
 		// only listen to message from our team
@@ -235,7 +242,6 @@ func (b *Bmattermost) handleMatterClient(mchan chan *MMMessage) {
 				continue
 			}
 			flog.Debugf("Receiving from matterclient %#v", message)
-			m := &MMMessage{}
 			m.UserID = message.UserID
 			m.Username = message.Username
 			m.Channel = message.Channel

bridge/slack/slack.go

@@ -163,6 +163,8 @@ func (b *Bslack) Send(msg config.Message) (string, error) {
 		np.IconURL = msg.Avatar
 	}
 	np.Attachments = append(np.Attachments, slack.Attachment{CallbackID: "matterbridge"})
+	np.Attachments = append(np.Attachments, b.createAttach(msg.Extra)...)
+
 	// replace mentions
 	np.LinkNames = 1
 
@@ -389,3 +391,28 @@ func (b *Bslack) replaceURL(text string) string {
 	}
 	return text
 }
+
+func (b *Bslack) createAttach(extra []interface{}) []slack.Attachment {
+	var attachs []slack.Attachment
+	if extra != nil {
+		for _, v := range extra {
+			entry := v.(map[string]interface{})
+			s := slack.Attachment{}
+			s.Fallback = entry["fallback"].(string)
+			s.Color = entry["color"].(string)
+			s.Pretext = entry["pretext"].(string)
+			s.AuthorName = entry["author_name"].(string)
+			s.AuthorLink = entry["author_link"].(string)
+			s.AuthorIcon = entry["author_icon"].(string)
+			s.Title = entry["title"].(string)
+			s.TitleLink = entry["title_link"].(string)
+			s.Text = entry["text"].(string)
+			s.ImageURL = entry["image_url"].(string)
+			s.ThumbURL = entry["thumb_url"].(string)
+			s.Footer = entry["footer"].(string)
+			s.FooterIcon = entry["footer_icon"].(string)
+			attachs = append(attachs, s)
+		}
+	}
+	return attachs
+}

gateway/gateway.go

@@ -147,6 +147,17 @@ func (gw *Gateway) getDestChannel(msg *config.Message, dest bridge.Bridge) []con
 
 func (gw *Gateway) handleMessage(msg config.Message, dest *bridge.Bridge) []*BrMsgID {
 	var brMsgIDs []*BrMsgID
+
+	// TODO refactor
+	// only slack now, check will have to be done in the different bridges.
+	// we need to check if we can't use fallback or text in other bridges
+	if msg.Extra != nil {
+		if dest.Protocol != "slack" {
+			if msg.Text == "" {
+				return brMsgIDs
+			}
+		}
+	}
 	// only relay join/part when configged
 	if msg.Event == config.EVENT_JOIN_LEAVE && !gw.Bridges[dest.Account].Config.ShowJoinPart {
 		return brMsgIDs
@@ -199,6 +210,10 @@ func (gw *Gateway) ignoreMessage(msg *config.Message) bool {
 		return true
 	}
 	if msg.Text == "" {
+		// we have an attachment
+		if msg.Extra != nil {
+			return false
+		}
 		log.Debugf("ignoring empty message %#v from %s", msg, msg.Account)
 		return true
 	}