Replace role ids in mentions to role names (discord). Closes #133

* The bot needs to have the "Manage Roles" permission for this to work.
(see Server settings - Roles - General Permissions)

bridge/discord/discord.go

@@ -122,6 +122,9 @@ func (b *bdiscord) messageCreate(s *discordgo.Session, m *discordgo.MessageCreat
 		channelName = "ID:" + m.ChannelID
 	}
 	username := b.getNick(m.Author)
+	if len(m.MentionRoles) > 0 {
+		m.Message.Content = b.replaceRoleMentions(m.Message.Content)
+	}
 	b.Remote <- config.Message{Username: username, Text: m.ContentWithMentionsReplaced(), Channel: channelName,
 		Account: b.Account, Avatar: "https://cdn.discordapp.com/avatars/" + m.Author.ID + "/" + m.Author.Avatar + ".jpg"}
 }
@@ -180,3 +183,15 @@ func (b *bdiscord) getChannelName(id string) string {
 	}
 	return ""
 }
+
+func (b *bdiscord) replaceRoleMentions(text string) string {
+	roles, err := b.c.GuildRoles(b.guildID)
+	if err != nil {
+		flog.Debugf("%#v", string(err.(*discordgo.RESTError).ResponseBody))
+		return text
+	}
+	for _, role := range roles {
+		text = strings.Replace(text, "<@&"+role.ID+">", "@"+role.Name, -1)
+	}
+	return text
+}

matterbridge.toml.sample

@@ -377,6 +377,7 @@ ShowJoinPart=false
 #Token to connect with Discord API
 #You can get your token by following the instructions on 
 #https://github.com/reactiflux/discord-irc/wiki/Creating-a-discord-bot-&-getting-a-token
+#If you want roles/groups mentions to be shown with names instead of ID, you'll need to give your bot the "Manage Roles" permission.
 #REQUIRED
 Token="Yourtokenhere"