Optionally suppress URL embeds for Discord

bridge/discord/discord.go

@@ -36,6 +36,9 @@ type Bdiscord struct {
  userMemberMap map[string]*discordgo.Member
  nickMemberMap map[string]*discordgo.Member
 
+ noEmbedPartUrls bool
+ noEmbedUrls bool
+
  // Webhook specific logic
  useAutoWebhooks bool
  transmitter *transmitter.Transmitter
@@ -57,6 +60,12 @@ func New(cfg *bridge.Config) bridge.Bridger {
  b.nickMemberMap = make(map[string]*discordgo.Member)
  b.channelInfoMap = make(map[string]*config.ChannelInfo)
 
+ b.noEmbedPartUrls = b.GetBool("NoEmbedPartUrls")
+ b.noEmbedUrls = b.GetBool("NoEmbedUrls")
+ if b.noEmbedPartUrls && b.noEmbedUrls {
+ b.Log.Info("NoEmbedUrls supersedes NoEmbedPartUrls when both are specified.")
+ }
+
  b.useAutoWebhooks = b.GetBool("AutoWebhooks")
  if b.useAutoWebhooks {
  b.Log.Debug("Using automatic webhooks")
@@ -269,6 +278,10 @@ func (b *Bdiscord) Send(msg config.Message) (string, error) {
  msg.Text = "_" + msg.Text + "_"
  }
 
+ if b.noEmbedUrls || (msg.Event == config.EventJoinLeave && b.noEmbedPartUrls) {
+ disableEmbedUrls(&msg.Text)
+ }
+
  // Handle prefix hint for unthreaded messages.
  if msg.ParentNotFound() {
  msg.ParentID = ""

bridge/discord/helpers.go

@@ -233,6 +233,11 @@ func (b *Bdiscord) splitURL(url string) (string, string, bool) {
  return webhookURLSplit[webhookIdxID], webhookURLSplit[webhookIdxToken], true
 }
 
+func disableEmbedUrls(msg *string) {
+ regex := regexp.MustCompile(`(\w+://\S+)`)
+ *msg = regex.ReplaceAllString(*msg, "<$1>")
+}
+
 func enumerateUsernames(s string) []string {
  onlySpace := true
  for _, r := range s {

matterbridge.toml.sample

@@ -940,6 +940,15 @@ IgnoreNicks=""
 # IgnoreMessages="^~~ badword"
 IgnoreMessages=""
 
+# Prevent URL embeds by encasing URLs in <> angle brackets.
+# Useful if trolls are a problem on the other end of your bridge.
+NoEmbedUrls=false
+
+# Prevent URL embeds in part/quit messages by encasing URLs in <> angle brackets.
+# Useful if trolls spam in their quit messages or you're tired of seeing embeds for
+# IRC client homepages.
+NoEmbedPartUrls=false
+
 # ReplaceMessages replaces substrings of messages in outgoing messages.
 # Regular expressions are supported.
 #