Add support for receiving attachments (keybase)

bridge/keybase/keybase.go

@@ -2,6 +2,9 @@ package bkeybase
 
 import (
 	"strconv"
+	"io/ioutil"
+	"os"
+	"path/filepath"
 
 	"github.com/42wim/matterbridge/bridge"
 	"github.com/42wim/matterbridge/bridge/config"
@@ -66,17 +69,30 @@ func (b *Bkeybase) Send(msg config.Message) (string, error) {
 	// Delete message if we have an ID
 	// Delete message not supported by keybase go library yet
 
-	// Upload a file if it exists
-	// kbchat lib does not support attachments yet
-
 	// Edit message if we have an ID
 	// kbchat lib does not support message editing yet
 
-	// Send regular message
-	resp, err := b.kbc.SendMessageByTeamName(b.team, msg.Username+msg.Text, &b.channel)
-	if err != nil {
-		return "", err
-	}
+	if len(msg.Extra["file"]) > 0 {
+		// Upload a file
+		dir, err := ioutil.TempDir("", "matterbridge")
+		if err != nil {
+			return "", err
+		}
+		defer os.RemoveAll(dir)
+		fname := msg.Extra["file"][0].(config.FileInfo).Name
+		fpath := filepath.Join(dir, msg.Extra["file"][0].(config.FileInfo).Name)
+		if err := ioutil.WriteFile(fpath, *msg.Extra["file"][0].(config.FileInfo).Data, 0600); err != nil {
+			return "", err
+		}
 
-	return strconv.Itoa(resp.Result.MsgID), err
+		resp, err := b.kbc.SendAttachmentByTeam(b.team, fpath, fname, &b.channel)
+		return strconv.Itoa(resp.Result.MsgID), err
+	} else {
+		// Send regular message
+		resp, err := b.kbc.SendMessageByTeamName(b.team, msg.Username+msg.Text, &b.channel)
+		if err != nil {
+			return "", err
+		}
+		return strconv.Itoa(resp.Result.MsgID), err
+	}
 }