| 1 | package bdiscord |
| 2 | |
| 3 | import ( |
| 4 | "errors" |
| 5 | "regexp" |
| 6 | "strings" |
| 7 | "unicode" |
| 8 | |
| 9 | "github.com/bwmarrin/discordgo" |
| 10 | ) |
| 11 | |
| 12 | func (b *Bdiscord) getAllowedMentions() *discordgo.MessageAllowedMentions { |
| 13 | // If AllowMention is not specified, then allow all mentions (default Discord behavior) |
| 14 | if !b.IsKeySet("AllowMention") { |
| 15 | return nil |
| 16 | } |
| 17 | |
| 18 | // Otherwise, allow only the mentions that are specified |
| 19 | allowedMentionTypes := make([]discordgo.AllowedMentionType, 0, 3) |
| 20 | for _, m := range b.GetStringSlice("AllowMention") { |
| 21 | switch m { |
| 22 | case "everyone": |
| 23 | allowedMentionTypes = append(allowedMentionTypes, discordgo.AllowedMentionTypeEveryone) |
| 24 | case "roles": |
| 25 | allowedMentionTypes = append(allowedMentionTypes, discordgo.AllowedMentionTypeRoles) |
| 26 | case "users": |
| 27 | allowedMentionTypes = append(allowedMentionTypes, discordgo.AllowedMentionTypeUsers) |
| 28 | } |
| 29 | } |
| 30 | |
| 31 | return &discordgo.MessageAllowedMentions{ |
| 32 | Parse: allowedMentionTypes, |
| 33 | } |
| 34 | } |
| 35 | |
| 36 | func (b *Bdiscord) getNick(user *discordgo.User, guildID string) string { |
| 37 | b.membersMutex.RLock() |
| 38 | defer b.membersMutex.RUnlock() |
| 39 | |
| 40 | if member, ok := b.userMemberMap[user.ID]; ok { |
| 41 | if member.Nick != "" { |
| 42 | // Only return if nick is set. |
| 43 | return member.Nick |
| 44 | } |
| 45 | // Otherwise return username. |
| 46 | return user.Username |
| 47 | } |
| 48 | |
| 49 | // If we didn't find nick, search for it. |
| 50 | member, err := b.c.GuildMember(guildID, user.ID) |
| 51 | if err != nil { |
| 52 | b.Log.Warnf("Failed to fetch information for member %#v on guild %#v: %s", user, guildID, err) |
| 53 | return user.Username |
| 54 | } else if member == nil { |
| 55 | b.Log.Warnf("Got no information for member %#v", user) |
| 56 | return user.Username |
| 57 | } |
| 58 | b.userMemberMap[user.ID] = member |
| 59 | b.nickMemberMap[member.User.Username] = member |
| 60 | if member.Nick != "" { |
| 61 | b.nickMemberMap[member.Nick] = member |
| 62 | return member.Nick |
| 63 | } |
| 64 | return user.Username |
| 65 | } |
| 66 | |
| 67 | func (b *Bdiscord) getGuildMemberByNick(nick string) (*discordgo.Member, error) { |
| 68 | b.membersMutex.RLock() |
| 69 | defer b.membersMutex.RUnlock() |
| 70 | |
| 71 | if member, ok := b.nickMemberMap[strings.TrimSpace(nick)]; ok { |
| 72 | return member, nil |
| 73 | } |
| 74 | return nil, errors.New("Couldn't find guild member with nick " + nick) // This will most likely get ignored by the caller |
| 75 | } |
| 76 | |
| 77 | func (b *Bdiscord) getChannelID(name string) string { |
| 78 | if strings.Contains(name, "/") { |
| 79 | return b.getCategoryChannelID(name) |
| 80 | } |
| 81 | b.channelsMutex.RLock() |
| 82 | defer b.channelsMutex.RUnlock() |
| 83 | |
| 84 | idcheck := strings.Split(name, "ID:") |
| 85 | if len(idcheck) > 1 { |
| 86 | return idcheck[1] |
| 87 | } |
| 88 | for _, channel := range b.channels { |
| 89 | if channel.Name == name && channel.Type == discordgo.ChannelTypeGuildText { |
| 90 | return channel.ID |
| 91 | } |
| 92 | } |
| 93 | return "" |
| 94 | } |
| 95 | |
| 96 | func (b *Bdiscord) getCategoryChannelID(name string) string { |
| 97 | b.channelsMutex.RLock() |
| 98 | defer b.channelsMutex.RUnlock() |
| 99 | res := strings.Split(name, "/") |
| 100 | // shouldn't happen because function should be only called from getChannelID |
| 101 | if len(res) != 2 { |
| 102 | return "" |
| 103 | } |
| 104 | catName, chanName := res[0], res[1] |
| 105 | for _, channel := range b.channels { |
| 106 | // if we have a parentID, lookup the name of that parent (category) |
| 107 | // and if it matches return it |
| 108 | if channel.Name == chanName && channel.ParentID != "" { |
| 109 | for _, cat := range b.channels { |
| 110 | if cat.ID == channel.ParentID && cat.Name == catName { |
| 111 | return channel.ID |
| 112 | } |
| 113 | } |
| 114 | } |
| 115 | } |
| 116 | return "" |
| 117 | } |
| 118 | |
| 119 | func (b *Bdiscord) getChannelName(id string) string { |
| 120 | b.channelsMutex.RLock() |
| 121 | defer b.channelsMutex.RUnlock() |
| 122 | |
| 123 | for _, c := range b.channelInfoMap { |
| 124 | if c.Name == "ID:"+id { |
| 125 | // if we have ID: specified in our gateway configuration return this |
| 126 | return c.Name |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | for _, channel := range b.channels { |
| 131 | if channel.ID == id { |
| 132 | return b.getCategoryChannelName(channel.Name, channel.ParentID) |
| 133 | } |
| 134 | } |
| 135 | return "" |
| 136 | } |
| 137 | |
| 138 | func (b *Bdiscord) getCategoryChannelName(name, parentID string) string { |
| 139 | var usesCat bool |
| 140 | // do we have a category configuration in the channel config |
| 141 | for _, c := range b.channelInfoMap { |
| 142 | if strings.Contains(c.Name, "/") { |
| 143 | usesCat = true |
| 144 | break |
| 145 | } |
| 146 | } |
| 147 | // configuration without category, return the normal channel name |
| 148 | if !usesCat { |
| 149 | return name |
| 150 | } |
| 151 | // create a category/channel response |
| 152 | for _, c := range b.channels { |
| 153 | if c.ID == parentID { |
| 154 | name = c.Name + "/" + name |
| 155 | } |
| 156 | } |
| 157 | return name |
| 158 | } |
| 159 | |
| 160 | var ( |
| 161 | // See https://discordapp.com/developers/docs/reference#message-formatting. |
| 162 | channelMentionRE = regexp.MustCompile("<#[0-9]+>") |
| 163 | userMentionRE = regexp.MustCompile("@[^@\n]{1,32}") |
| 164 | emoteRE = regexp.MustCompile(`<a?(:\w+:)\d+>`) |
| 165 | ) |
| 166 | |
| 167 | func (b *Bdiscord) replaceChannelMentions(text string) string { |
| 168 | replaceChannelMentionFunc := func(match string) string { |
| 169 | channelID := match[2 : len(match)-1] |
| 170 | channelName := b.getChannelName(channelID) |
| 171 | |
| 172 | // If we don't have the channel refresh our list. |
| 173 | if channelName == "" { |
| 174 | var err error |
| 175 | b.channels, err = b.c.GuildChannels(b.guildID) |
| 176 | if err != nil { |
| 177 | return "#unknownchannel" |
| 178 | } |
| 179 | channelName = b.getChannelName(channelID) |
| 180 | } |
| 181 | return "#" + channelName |
| 182 | } |
| 183 | return channelMentionRE.ReplaceAllStringFunc(text, replaceChannelMentionFunc) |
| 184 | } |
| 185 | |
| 186 | func (b *Bdiscord) replaceUserMentions(text string) string { |
| 187 | replaceUserMentionFunc := func(match string) string { |
| 188 | var ( |
| 189 | err error |
| 190 | member *discordgo.Member |
| 191 | username string |
| 192 | ) |
| 193 | |
| 194 | usernames := enumerateUsernames(match[1:]) |
| 195 | for _, username = range usernames { |
| 196 | b.Log.Debugf("Testing mention: '%s'", username) |
| 197 | member, err = b.getGuildMemberByNick(username) |
| 198 | if err == nil { |
| 199 | break |
| 200 | } |
| 201 | } |
| 202 | if member == nil { |
| 203 | return match |
| 204 | } |
| 205 | return strings.Replace(match, "@"+username, member.User.Mention(), 1) |
| 206 | } |
| 207 | return userMentionRE.ReplaceAllStringFunc(text, replaceUserMentionFunc) |
| 208 | } |
| 209 | |
| 210 | func replaceEmotes(text string) string { |
| 211 | return emoteRE.ReplaceAllString(text, "$1") |
| 212 | } |
| 213 | |
| 214 | func (b *Bdiscord) replaceAction(text string) (string, bool) { |
| 215 | length := len(text) |
| 216 | if length > 1 && text[0] == '_' && text[length-1] == '_' { |
| 217 | return text[1 : length-1], true |
| 218 | } |
| 219 | return text, false |
| 220 | } |
| 221 | |
| 222 | // splitURL splits a webhookURL and returns the ID and token. |
| 223 | func (b *Bdiscord) splitURL(url string) (string, string, bool) { |
| 224 | const ( |
| 225 | expectedWebhookSplitCount = 7 |
| 226 | webhookIdxID = 5 |
| 227 | webhookIdxToken = 6 |
| 228 | ) |
| 229 | webhookURLSplit := strings.Split(url, "/") |
| 230 | if len(webhookURLSplit) != expectedWebhookSplitCount { |
| 231 | return "", "", false |
| 232 | } |
| 233 | return webhookURLSplit[webhookIdxID], webhookURLSplit[webhookIdxToken], true |
| 234 | } |
| 235 | |
| 236 | func enumerateUsernames(s string) []string { |
| 237 | onlySpace := true |
| 238 | for _, r := range s { |
| 239 | if !unicode.IsSpace(r) { |
| 240 | onlySpace = false |
| 241 | break |
| 242 | } |
| 243 | } |
| 244 | if onlySpace { |
| 245 | return nil |
| 246 | } |
| 247 | |
| 248 | var username, endSpace string |
| 249 | var usernames []string |
| 250 | skippingSpace := true |
| 251 | for _, r := range s { |
| 252 | if unicode.IsSpace(r) { |
| 253 | if !skippingSpace { |
| 254 | usernames = append(usernames, username) |
| 255 | skippingSpace = true |
| 256 | } |
| 257 | endSpace += string(r) |
| 258 | username += string(r) |
| 259 | } else { |
| 260 | endSpace = "" |
| 261 | username += string(r) |
| 262 | skippingSpace = false |
| 263 | } |
| 264 | } |
| 265 | if endSpace == "" { |
| 266 | usernames = append(usernames, username) |
| 267 | } |
| 268 | return usernames |
| 269 | } |
| 270 | |
