package bdiscord import ( "errors" "regexp" "strings" "unicode" "github.com/matterbridge/discordgo" ) func (b *Bdiscord) getAllowedMentions() *discordgo.MessageAllowedMentions { // If AllowMention is not specified, then allow all mentions (default Discord behavior) if !b.IsKeySet("AllowMention") { return nil } // Otherwise, allow only the mentions that are specified allowedMentionTypes := make([]discordgo.AllowedMentionType, 0, 3) for _, m := range b.GetStringSlice("AllowMention") { switch m { case "everyone": allowedMentionTypes = append(allowedMentionTypes, discordgo.AllowedMentionTypeEveryone) case "roles": allowedMentionTypes = append(allowedMentionTypes, discordgo.AllowedMentionTypeRoles) case "users": allowedMentionTypes = append(allowedMentionTypes, discordgo.AllowedMentionTypeUsers) } } return &discordgo.MessageAllowedMentions{ Parse: allowedMentionTypes, } } func (b *Bdiscord) getNick(user *discordgo.User, guildID string) string { b.membersMutex.RLock() defer b.membersMutex.RUnlock() if member, ok := b.userMemberMap[user.ID]; ok { if member.Nick != "" { // Only return if nick is set. return member.Nick } // Otherwise return username. return user.Username } // If we didn't find nick, search for it. member, err := b.c.GuildMember(guildID, user.ID) if err != nil { b.Log.Warnf("Failed to fetch information for member %#v on guild %#v: %s", user, guildID, err) return user.Username } else if member == nil { b.Log.Warnf("Got no information for member %#v", user) return user.Username } b.userMemberMap[user.ID] = member b.nickMemberMap[member.User.Username] = member if member.Nick != "" { b.nickMemberMap[member.Nick] = member return member.Nick } return user.Username } func (b *Bdiscord) getGuildMemberByNick(nick string) (*discordgo.Member, error) { b.membersMutex.RLock() defer b.membersMutex.RUnlock() if member, ok := b.nickMemberMap[nick]; ok { return member, nil } return nil, errors.New("Couldn't find guild member with nick " + nick) // This will most likely get ignored by the caller } func (b *Bdiscord) getChannelID(name string) string { if strings.Contains(name, "/") { return b.getCategoryChannelID(name) } b.channelsMutex.RLock() defer b.channelsMutex.RUnlock() idcheck := strings.Split(name, "ID:") if len(idcheck) > 1 { return idcheck[1] } for _, channel := range b.channels { if channel.Name == name && channel.Type == discordgo.ChannelTypeGuildText { return channel.ID } } return "" } func (b *Bdiscord) getCategoryChannelID(name string) string { b.channelsMutex.RLock() defer b.channelsMutex.RUnlock() res := strings.Split(name, "/") // shouldn't happen because function should be only called from getChannelID if len(res) != 2 { return "" } catName, chanName := res[0], res[1] for _, channel := range b.channels { // if we have a parentID, lookup the name of that parent (category) // and if it matches return it if channel.Name == chanName && channel.ParentID != "" { for _, cat := range b.channels { if cat.ID == channel.ParentID && cat.Name == catName { return channel.ID } } } } return "" } func (b *Bdiscord) getChannelName(id string) string { b.channelsMutex.RLock() defer b.channelsMutex.RUnlock() for _, c := range b.channelInfoMap { if c.Name == "ID:"+id { // if we have ID: specified in our gateway configuration return this return c.Name } } for _, channel := range b.channels { if channel.ID == id { return b.getCategoryChannelName(channel.Name, channel.ParentID) } } return "" } func (b *Bdiscord) getCategoryChannelName(name, parentID string) string { var usesCat bool // do we have a category configuration in the channel config for _, c := range b.channelInfoMap { if strings.Contains(c.Name, "/") { usesCat = true break } } // configuration without category, return the normal channel name if !usesCat { return name } // create a category/channel response for _, c := range b.channels { if c.ID == parentID { name = c.Name + "/" + name } } return name } var ( // See https://discordapp.com/developers/docs/reference#message-formatting. channelMentionRE = regexp.MustCompile("<#[0-9]+>") userMentionRE = regexp.MustCompile("@[^@\n]{1,32}") emoteRE = regexp.MustCompile(``) ) func (b *Bdiscord) replaceChannelMentions(text string) string { replaceChannelMentionFunc := func(match string) string { channelID := match[2 : len(match)-1] channelName := b.getChannelName(channelID) // If we don't have the channel refresh our list. if channelName == "" { var err error b.channels, err = b.c.GuildChannels(b.guildID) if err != nil { return "#unknownchannel" } channelName = b.getChannelName(channelID) } return "#" + channelName } return channelMentionRE.ReplaceAllStringFunc(text, replaceChannelMentionFunc) } func (b *Bdiscord) replaceUserMentions(text string) string { replaceUserMentionFunc := func(match string) string { var ( err error member *discordgo.Member username string ) usernames := enumerateUsernames(match[1:]) for _, username = range usernames { b.Log.Debugf("Testing mention: '%s'", username) member, err = b.getGuildMemberByNick(username) if err == nil { break } } if member == nil { return match } return strings.Replace(match, "@"+username, member.User.Mention(), 1) } return userMentionRE.ReplaceAllStringFunc(text, replaceUserMentionFunc) } func replaceEmotes(text string) string { return emoteRE.ReplaceAllString(text, "$1") } func (b *Bdiscord) replaceAction(text string) (string, bool) { length := len(text) if length > 1 && text[0] == '_' && text[length-1] == '_' { return text[1 : length-1], true } return text, false } // splitURL splits a webhookURL and returns the ID and token. func (b *Bdiscord) splitURL(url string) (string, string, bool) { const ( expectedWebhookSplitCount = 7 webhookIdxID = 5 webhookIdxToken = 6 ) webhookURLSplit := strings.Split(url, "/") if len(webhookURLSplit) != expectedWebhookSplitCount { return "", "", false } return webhookURLSplit[webhookIdxID], webhookURLSplit[webhookIdxToken], true } func enumerateUsernames(s string) []string { onlySpace := true for _, r := range s { if !unicode.IsSpace(r) { onlySpace = false break } } if onlySpace { return nil } var username, endSpace string var usernames []string skippingSpace := true for _, r := range s { if unicode.IsSpace(r) { if !skippingSpace { usernames = append(usernames, username) skippingSpace = true } endSpace += string(r) username += string(r) } else { endSpace = "" username += string(r) skippingSpace = false } } if endSpace == "" { usernames = append(usernames, username) } return usernames }