Add Features - Mention and Channel Link conversion for Discord Relay (#4

)

* Added functionality to convert mentions

src/relayDiscord.go

@@ -44,6 +44,9 @@ func messageCreate(s *discordgo.Session, m *discordgo.MessageCreate) {
  message = m.Content
  }
 
+ // Convert all <@ >, <# >, and similarly formatted items in Discord messages to something we can actually read.
+ message = convertDiscordFormattedItems(message, m.GuildID)
+
  // Convert <:example:868167672758693909> to :example:
  message = filterDiscordEmotes(message)
 

src/utils.go

@@ -81,6 +81,62 @@ func bToMb(b uint64) uint64 {
  return b / 1024 / 1024
 }
 
+// convertDiscordFormattedItems : Formats Discord Formatted Items to Text Only
+func convertDiscordFormattedItems(str string, gid string) string {
+ // match all discord formatted items
+ reChannel := regexp.MustCompile(`<#(\d+)>`)
+ reMentionUser := regexp.MustCompile(`<@(?:\!)?(\d+)>`)
+ reMentionRole := regexp.MustCompile(`<@&(\d+)>`)
+
+ str = reChannel.ReplaceAllStringFunc(str, func(s string) string {
+ // get the channels for this guild
+ id := reChannel.FindStringSubmatch(s)[1]
+ channels, err := DiscordSession.GuildChannels(gid)
+ if err != nil {
+ log.Errorln("[utils:convertDiscordFormattedItems]", "Error getting guild channels: ", err)
+ return s
+ }
+ for _, c := range channels {
+ if c.ID == id {
+ return "<%" + c.Name + ">"
+ }
+ }
+
+ return s
+ })
+ reMentionUser.FindAllStringSubmatchIndex(str, -1)
+ str = reMentionUser.ReplaceAllStringFunc(str, func(s string) string {
+ // get the user for this guild
+ id := reMentionUser.FindStringSubmatch(s)[1]
+ member, err := DiscordSession.GuildMember(gid, id)
+ if err != nil {
+ log.Errorln("[utils:convertDiscordFormattedItems]", "Error getting guild member: ", err)
+ return s
+ }
+ if member.Nick != "" {
+ return "<@" + member.Nick + ">"
+ } else {
+ return "<@" + member.User.Username + ">"
+ }
+ })
+ str = reMentionRole.ReplaceAllStringFunc(str, func(s string) string {
+ // get the role for this guild
+ id := reMentionRole.FindStringSubmatch(s)[1]
+ roles, err := DiscordSession.GuildRoles(gid)
+ if err != nil {
+ log.Errorln("[utils:convertDiscordFormattedItems]", "Error getting guild roles: ", err)
+ return s
+ }
+ for _, r := range roles {
+ if r.ID == id {
+ return "<%@" + r.Name + ">"
+ }
+ }
+ return s
+ })
+ return str
+}
+
 // filterDiscordEmotes : Formats Discord Emotes Correctly
 func filterDiscordEmotes(str string) string {
  re := regexp.MustCompile(`<:(\S+):\d+>`)