Strip IRC colors sent to Slack

bridge/slack/slack.go

@@ -7,6 +7,7 @@ import (
 	"strings"
 	"sync"
 	"time"
+	"regexp"
 
 	"github.com/42wim/matterbridge/bridge"
 	"github.com/42wim/matterbridge/bridge/config"
@@ -181,6 +182,10 @@ func (b *Bslack) Send(msg config.Message) (string, error) {
 
 	msg.Text = b.replaceCodeFence(msg.Text)
 
+	// Strip IRC colors sent to Slack
+	re := regexp.MustCompile(`\x03(?:\d{1,2}(?:,\d{1,2})?)?|[[:cntrl:]]`)
+	msg.Text = re.ReplaceAllString(msg.Text, "")
+
 	// Make a action /me of the message
 	if msg.Event == config.EventUserAction {
 		msg.Text = "_" + msg.Text + "_"