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Code Releases Activity

Split Discord bridge in multiple files (#632)

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This commit is contained in:
Duco van Amstel 2018-12-07 22:36:01 +00:00 committed by Wim
parent af7a00d030
commit 0365c0786a
4 changed files with 412 additions and 257 deletions
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303
bridge/discord/discord.go
View File

@ -2,9 +2,7 @@ package bdiscord
import ( import (
"bytes" "bytes"
"errors"
"fmt" "fmt"
"regexp"
"strings" "strings"
"sync" "sync"
@ -17,18 +15,23 @@ import (
const MessageLength = 1950 const MessageLength = 1950
type Bdiscord struct { type Bdiscord struct {
*bridge.Config
c *discordgo.Session c *discordgo.Session
Channels []*discordgo.Channel
Nick string nick string
UseChannelID bool useChannelID bool
userMemberMap map[string]*discordgo.Member
nickMemberMap map[string]*discordgo.Member
guildID string guildID string
webhookID string webhookID string
webhookToken string webhookToken string
channelsMutex sync.RWMutex
channels []*discordgo.Channel
channelInfoMap map[string]*config.ChannelInfo channelInfoMap map[string]*config.ChannelInfo
sync.RWMutex
*bridge.Config membersMutex sync.RWMutex
userMemberMap map[string]*discordgo.Member
nickMemberMap map[string]*discordgo.Member
} }
func New(cfg *bridge.Config) bridge.Bridger { func New(cfg *bridge.Config) bridge.Bridger {
@ -77,28 +80,40 @@ func (b *Bdiscord) Connect() error {
return err return err
} }
serverName := strings.Replace(b.GetString("Server"), "ID:", "", -1) serverName := strings.Replace(b.GetString("Server"), "ID:", "", -1)
b.Nick = userinfo.Username b.nick = userinfo.Username
b.channelsMutex.Lock()
for _, guild := range guilds { for _, guild := range guilds {
if guild.Name == serverName || guild.ID == serverName { if guild.Name == serverName || guild.ID == serverName {
b.Channels, err = b.c.GuildChannels(guild.ID) b.channels, err = b.c.GuildChannels(guild.ID)
b.guildID = guild.ID b.guildID = guild.ID
if err != nil {
break
}
}
}
b.channelsMutex.Unlock()
if err != nil { if err != nil {
return err return err
} }
} b.channelsMutex.RLock()
} for _, channel := range b.channels {
for _, channel := range b.Channels {
b.Log.Debugf("found channel %#v", channel) b.Log.Debugf("found channel %#v", channel)
} }
// obtaining guild members and initializing nickname mapping b.channelsMutex.RUnlock()
b.Lock()
defer b.Unlock() // Obtaining guild members and initializing nickname mapping.
b.membersMutex.Lock()
defer b.membersMutex.Unlock()
members, err := b.c.GuildMembers(b.guildID, "", 1000) members, err := b.c.GuildMembers(b.guildID, "", 1000)
if err != nil { if err != nil {
b.Log.Error("Error obtaining guild members", err) b.Log.Error("Error obtaining guild members", err)
return err return err
} }
for _, member := range members { for _, member := range members {
if member == nil {
b.Log.Warnf("Skipping missing information for a user.")
continue
}
b.userMemberMap[member.User.ID] = member b.userMemberMap[member.User.ID] = member
b.nickMemberMap[member.User.Username] = member b.nickMemberMap[member.User.Username] = member
if member.Nick != "" { if member.Nick != "" {
@ -113,10 +128,13 @@ func (b *Bdiscord) Disconnect() error {
} }
func (b *Bdiscord) JoinChannel(channel config.ChannelInfo) error { func (b *Bdiscord) JoinChannel(channel config.ChannelInfo) error {
b.channelsMutex.Lock()
defer b.channelsMutex.Unlock()
b.channelInfoMap[channel.ID] = &channel b.channelInfoMap[channel.ID] = &channel
idcheck := strings.Split(channel.Name, "ID:") idcheck := strings.Split(channel.Name, "ID:")
if len(idcheck) > 1 { if len(idcheck) > 1 {
b.UseChannelID = true b.useChannelID = true
} }
return nil return nil
} }
@ -139,11 +157,13 @@ func (b *Bdiscord) Send(msg config.Message) (string, error) {
wToken := b.webhookToken wToken := b.webhookToken
// check if have a channel specific webhook // check if have a channel specific webhook
b.channelsMutex.RLock()
if ci, ok := b.channelInfoMap[msg.Channel+b.Account]; ok { if ci, ok := b.channelInfoMap[msg.Channel+b.Account]; ok {
if ci.Options.WebhookURL != "" { if ci.Options.WebhookURL != "" {
wID, wToken = b.splitURL(ci.Options.WebhookURL) wID, wToken = b.splitURL(ci.Options.WebhookURL)
} }
} }
b.channelsMutex.RUnlock()
// Use webhook to send the message // Use webhook to send the message
if wID != "" { if wID != "" {
@ -196,7 +216,9 @@ func (b *Bdiscord) Send(msg config.Message) (string, error) {
if msg.Extra != nil { if msg.Extra != nil {
for _, rmsg := range helper.HandleExtra(&msg, b.General) { for _, rmsg := range helper.HandleExtra(&msg, b.General) {
rmsg.Text = helper.ClipMessage(rmsg.Text, MessageLength) rmsg.Text = helper.ClipMessage(rmsg.Text, MessageLength)
b.c.ChannelMessageSend(channelID, rmsg.Username+rmsg.Text) if _, err := b.c.ChannelMessageSend(channelID, rmsg.Username+rmsg.Text); err != nil {
b.Log.Errorf("Could not send message %#v: %v", rmsg, err)
}
} }
// check if we have files to upload (from slack, telegram or mattermost) // check if we have files to upload (from slack, telegram or mattermost)
if len(msg.Extra["file"]) > 0 { if len(msg.Extra["file"]) > 0 {
@ -221,246 +243,15 @@ func (b *Bdiscord) Send(msg config.Message) (string, error) {
return res.ID, err return res.ID, err
} }
func (b *Bdiscord) messageDelete(s *discordgo.Session, m *discordgo.MessageDelete) {
rmsg := config.Message{Account: b.Account, ID: m.ID, Event: config.EventMsgDelete, Text: config.EventMsgDelete}
rmsg.Channel = b.getChannelName(m.ChannelID)
if b.UseChannelID {
rmsg.Channel = "ID:" + m.ChannelID
}
b.Log.Debugf("<= Sending message from %s to gateway", b.Account)
b.Log.Debugf("<= Message is %#v", rmsg)
b.Remote <- rmsg
}
func (b *Bdiscord) messageUpdate(s *discordgo.Session, m *discordgo.MessageUpdate) {
if b.GetBool("EditDisable") {
return
}
// only when message is actually edited
if m.Message.EditedTimestamp != "" {
b.Log.Debugf("Sending edit message")
m.Content += b.GetString("EditSuffix")
b.messageCreate(s, (*discordgo.MessageCreate)(m))
}
}
func (b *Bdiscord) messageCreate(s *discordgo.Session, m *discordgo.MessageCreate) {
var err error
// not relay our own messages
if m.Author.Username == b.Nick {
return
}
// if using webhooks, do not relay if it's ours
if b.useWebhook() && m.Author.Bot && b.isWebhookID(m.Author.ID) {
return
}
// add the url of the attachments to content
if len(m.Attachments) > 0 {
for _, attach := range m.Attachments {
m.Content = m.Content + "\n" + attach.URL
}
}
rmsg := config.Message{Account: b.Account, Avatar: "https://cdn.discordapp.com/avatars/" + m.Author.ID + "/" + m.Author.Avatar + ".jpg", UserID: m.Author.ID, ID: m.ID}
if m.Content != "" {
b.Log.Debugf("== Receiving event %#v", m.Message)
m.Message.Content = b.stripCustomoji(m.Message.Content)
m.Message.Content = b.replaceChannelMentions(m.Message.Content)
rmsg.Text, err = m.ContentWithMoreMentionsReplaced(b.c)
if err != nil {
b.Log.Errorf("ContentWithMoreMentionsReplaced failed: %s", err)
rmsg.Text = m.ContentWithMentionsReplaced()
}
}
// set channel name
rmsg.Channel = b.getChannelName(m.ChannelID)
if b.UseChannelID {
rmsg.Channel = "ID:" + m.ChannelID
}
// set username
if !b.GetBool("UseUserName") {
rmsg.Username = b.getNick(m.Author)
} else {
rmsg.Username = m.Author.Username
}
// if we have embedded content add it to text
if b.GetBool("ShowEmbeds") && m.Message.Embeds != nil {
for _, embed := range m.Message.Embeds {
rmsg.Text = rmsg.Text + "embed: " + embed.Title + " - " + embed.Description + " - " + embed.URL + "\n"
}
}
// no empty messages
if rmsg.Text == "" {
return
}
// do we have a /me action
var ok bool
rmsg.Text, ok = b.replaceAction(rmsg.Text)
if ok {
rmsg.Event = config.EventUserAction
}
b.Log.Debugf("<= Sending message from %s on %s to gateway", m.Author.Username, b.Account)
b.Log.Debugf("<= Message is %#v", rmsg)
b.Remote <- rmsg
}
func (b *Bdiscord) memberUpdate(s *discordgo.Session, m *discordgo.GuildMemberUpdate) {
b.Lock()
if _, ok := b.userMemberMap[m.Member.User.ID]; ok {
b.Log.Debugf("%s: memberupdate: user %s (nick %s) changes nick to %s", b.Account, m.Member.User.Username, b.userMemberMap[m.Member.User.ID].Nick, m.Member.Nick)
}
b.userMemberMap[m.Member.User.ID] = m.Member
b.nickMemberMap[m.Member.User.Username] = m.Member
if m.Member.Nick != "" {
b.nickMemberMap[m.Member.Nick] = m.Member
}
b.Unlock()
}
func (b *Bdiscord) getNick(user *discordgo.User) string {
var err error
b.Lock()
defer b.Unlock()
if _, ok := b.userMemberMap[user.ID]; ok {
if b.userMemberMap[user.ID] != nil {
if b.userMemberMap[user.ID].Nick != "" {
// only return if nick is set
return b.userMemberMap[user.ID].Nick
}
// otherwise return username
return user.Username
}
}
// if we didn't find nick, search for it
member, err := b.c.GuildMember(b.guildID, user.ID)
if err != nil {
return user.Username
}
b.userMemberMap[user.ID] = member
// only return if nick is set
if b.userMemberMap[user.ID].Nick != "" {
return b.userMemberMap[user.ID].Nick
}
return user.Username
}
func (b *Bdiscord) getGuildMemberByNick(nick string) (*discordgo.Member, error) {
b.Lock()
defer b.Unlock()
if _, ok := b.nickMemberMap[nick]; ok {
if b.nickMemberMap[nick] != nil {
return b.nickMemberMap[nick], 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 {
idcheck := strings.Split(name, "ID:")
if len(idcheck) > 1 {
return idcheck[1]
}
for _, channel := range b.Channels {
if channel.Name == name {
return channel.ID
}
}
return ""
}
func (b *Bdiscord) getChannelName(id string) string {
for _, channel := range b.Channels {
if channel.ID == id {
return channel.Name
}
}
return ""
}
func (b *Bdiscord) replaceChannelMentions(text string) string {
var err error
re := regexp.MustCompile("<#[0-9]+>")
text = re.ReplaceAllStringFunc(text, func(m string) string {
channel := b.getChannelName(m[2 : len(m)-1])
// if at first don't succeed, try again
if channel == "" {
b.Channels, err = b.c.GuildChannels(b.guildID)
if err != nil {
return "#unknownchannel"
}
channel = b.getChannelName(m[2 : len(m)-1])
return "#" + channel
}
return "#" + channel
})
return text
}
func (b *Bdiscord) replaceUserMentions(text string) string {
re := regexp.MustCompile("@[^@]{1,32}")
text = re.ReplaceAllStringFunc(text, func(m string) string {
mention := strings.TrimSpace(m[1:])
var member *discordgo.Member
var err error
for {
b.Log.Debugf("Testing mention: '%s'", mention)
member, err = b.getGuildMemberByNick(mention)
if err != nil {
lastSpace := strings.LastIndex(mention, " ")
if lastSpace == -1 {
break
}
mention = strings.TrimSpace(mention[0:lastSpace])
} else {
break
}
}
if err != nil {
return m
}
return strings.Replace(m, "@"+mention, member.User.Mention(), -1)
})
b.Log.Debugf("Message with mention replaced: %s", text)
return text
}
func (b *Bdiscord) replaceAction(text string) (string, bool) {
if strings.HasPrefix(text, "_") && strings.HasSuffix(text, "_") {
return strings.Replace(text, "_", "", -1), true
}
return text, false
}
func (b *Bdiscord) stripCustomoji(text string) string {
// <:doge:302803592035958784>
re := regexp.MustCompile("<(:.*?:)[0-9]+>")
return re.ReplaceAllString(text, `$1`)
}
// splitURL splits a webhookURL and returns the id and token
func (b *Bdiscord) splitURL(url string) (string, string) {
webhookURLSplit := strings.Split(url, "/")
if len(webhookURLSplit) != 7 {
b.Log.Fatalf("%s is no correct discord WebhookURL", url)
}
return webhookURLSplit[len(webhookURLSplit)-2], webhookURLSplit[len(webhookURLSplit)-1]
}
// useWebhook returns true if we have a webhook defined somewhere // useWebhook returns true if we have a webhook defined somewhere
func (b *Bdiscord) useWebhook() bool { func (b *Bdiscord) useWebhook() bool {
if b.GetString("WebhookURL") != "" { if b.GetString("WebhookURL") != "" {
return true return true
} }
b.channelsMutex.RLock()
defer b.channelsMutex.RUnlock()
for _, channel := range b.channelInfoMap { for _, channel := range b.channelInfoMap {
if channel.Options.WebhookURL != "" { if channel.Options.WebhookURL != "" {
return true return true
@ -477,6 +268,10 @@ func (b *Bdiscord) isWebhookID(id string) bool {
return true return true
} }
} }
b.channelsMutex.RLock()
defer b.channelsMutex.RUnlock()
for _, channel := range b.channelInfoMap { for _, channel := range b.channelInfoMap {
if channel.Options.WebhookURL != "" { if channel.Options.WebhookURL != "" {
wID, _ := b.splitURL(channel.Options.WebhookURL) wID, _ := b.splitURL(channel.Options.WebhookURL)

125
bridge/discord/handlers.go Normal file
View File

@ -0,0 +1,125 @@
package bdiscord
import (
"github.com/42wim/matterbridge/bridge/config"
"github.com/bwmarrin/discordgo"
)
func (b *Bdiscord) messageDelete(s *discordgo.Session, m *discordgo.MessageDelete) {
rmsg := config.Message{Account: b.Account, ID: m.ID, Event: config.EventMsgDelete, Text: config.EventMsgDelete}
rmsg.Channel = b.getChannelName(m.ChannelID)
if b.useChannelID {
rmsg.Channel = "ID:" + m.ChannelID
}
b.Log.Debugf("<= Sending message from %s to gateway", b.Account)
b.Log.Debugf("<= Message is %#v", rmsg)
b.Remote <- rmsg
}
func (b *Bdiscord) messageUpdate(s *discordgo.Session, m *discordgo.MessageUpdate) {
if b.GetBool("EditDisable") {
return
}
// only when message is actually edited
if m.Message.EditedTimestamp != "" {
b.Log.Debugf("Sending edit message")
m.Content += b.GetString("EditSuffix")
b.messageCreate(s, (*discordgo.MessageCreate)(m))
}
}
func (b *Bdiscord) messageCreate(s *discordgo.Session, m *discordgo.MessageCreate) {
var err error
// not relay our own messages
if m.Author.Username == b.nick {
return
}
// if using webhooks, do not relay if it's ours
if b.useWebhook() && m.Author.Bot && b.isWebhookID(m.Author.ID) {
return
}
// add the url of the attachments to content
if len(m.Attachments) > 0 {
for _, attach := range m.Attachments {
m.Content = m.Content + "\n" + attach.URL
}
}
rmsg := config.Message{Account: b.Account, Avatar: "https://cdn.discordapp.com/avatars/" + m.Author.ID + "/" + m.Author.Avatar + ".jpg", UserID: m.Author.ID, ID: m.ID}
if m.Content != "" {
b.Log.Debugf("== Receiving event %#v", m.Message)
m.Message.Content = b.stripCustomoji(m.Message.Content)
m.Message.Content = b.replaceChannelMentions(m.Message.Content)
rmsg.Text, err = m.ContentWithMoreMentionsReplaced(b.c)
if err != nil {
b.Log.Errorf("ContentWithMoreMentionsReplaced failed: %s", err)
rmsg.Text = m.ContentWithMentionsReplaced()
}
}
// set channel name
rmsg.Channel = b.getChannelName(m.ChannelID)
if b.useChannelID {
rmsg.Channel = "ID:" + m.ChannelID
}
// set username
if !b.GetBool("UseUserName") {
rmsg.Username = b.getNick(m.Author)
} else {
rmsg.Username = m.Author.Username
}
// if we have embedded content add it to text
if b.GetBool("ShowEmbeds") && m.Message.Embeds != nil {
for _, embed := range m.Message.Embeds {
rmsg.Text = rmsg.Text + "embed: " + embed.Title + " - " + embed.Description + " - " + embed.URL + "\n"
}
}
// no empty messages
if rmsg.Text == "" {
return
}
// do we have a /me action
var ok bool
rmsg.Text, ok = b.replaceAction(rmsg.Text)
if ok {
rmsg.Event = config.EventUserAction
}
b.Log.Debugf("<= Sending message from %s on %s to gateway", m.Author.Username, b.Account)
b.Log.Debugf("<= Message is %#v", rmsg)
b.Remote <- rmsg
}
func (b *Bdiscord) memberUpdate(s *discordgo.Session, m *discordgo.GuildMemberUpdate) {
if m.Member == nil {
b.Log.Warnf("Received member update with no member information: %#v", m)
}
b.membersMutex.Lock()
defer b.membersMutex.Unlock()
if currMember, ok := b.userMemberMap[m.Member.User.ID]; ok {
b.Log.Debugf(
"%s: memberupdate: user %s (nick %s) changes nick to %s",
b.Account,
m.Member.User.Username,
b.userMemberMap[m.Member.User.ID].Nick,
m.Member.Nick,
)
delete(b.nickMemberMap, currMember.User.Username)
delete(b.nickMemberMap, currMember.Nick)
delete(b.userMemberMap, m.Member.User.ID)
}
b.userMemberMap[m.Member.User.ID] = m.Member
b.nickMemberMap[m.Member.User.Username] = m.Member
if m.Member.Nick != "" {
b.nickMemberMap[m.Member.Nick] = m.Member
}
}

189
bridge/discord/helpers.go Normal file
View File

@ -0,0 +1,189 @@
package bdiscord
import (
"errors"
"regexp"
"strings"
"unicode"
"github.com/bwmarrin/discordgo"
)
func (b *Bdiscord) getNick(user *discordgo.User) 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(b.guildID, user.ID)
if err != nil {
b.Log.Warnf("Failed to fetch information for member %#v: %#v", user, 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 {
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 {
return channel.ID
}
}
return ""
}
func (b *Bdiscord) getChannelName(id string) string {
b.channelsMutex.RLock()
defer b.channelsMutex.RUnlock()
for _, channel := range b.channels {
if channel.ID == id {
return channel.Name
}
}
return ""
}
var (
// See https://discordapp.com/developers/docs/reference#message-formatting.
channelMentionRE = regexp.MustCompile("<#[0-9]+>")
emojiRE = regexp.MustCompile("<(:.*?:)[0-9]+>")
userMentionRE = regexp.MustCompile("@[^@\n]{1,32}")
)
func (b *Bdiscord) replaceChannelMentions(text string) string {
replaceChannelMentionFunc := func(match string) string {
var err error
channelID := match[2 : len(match)-1]
channelName := b.getChannelName(channelID)
// If we don't have the channel refresh our list.
if channelName == "" {
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 (b *Bdiscord) stripCustomoji(text string) string {
return emojiRE.ReplaceAllString(text, `$1`)
}
func (b *Bdiscord) replaceAction(text string) (string, bool) {
if strings.HasPrefix(text, "_") && strings.HasSuffix(text, "_") {
return text[1:], true
}
return text, false
}
// splitURL splits a webhookURL and returns the ID and token.
func (b *Bdiscord) splitURL(url string) (string, string) {
const (
expectedWebhookSplitCount = 7
webhookIdxID = 5
webhookIdxToken = 6
)
webhookURLSplit := strings.Split(url, "/")
if len(webhookURLSplit) != expectedWebhookSplitCount {
b.Log.Fatalf("%s is no correct discord WebhookURL", url)
}
return webhookURLSplit[webhookIdxID], webhookURLSplit[webhookIdxToken]
}
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
}

46
bridge/discord/helpers_test.go Normal file
View File

@ -0,0 +1,46 @@
package bdiscord
import (
"testing"
"github.com/stretchr/testify/assert"
)
func TestEnumerateUsernames(t *testing.T) {
testcases := map[string]struct {
match string
expectedUsernames []string
}{
"only space": {
match: " \t\n \t",
expectedUsernames: nil,
},
"single word": {
match: "veni",
expectedUsernames: []string{"veni"},
},
"single word with preceeding space": {
match: " vidi",
expectedUsernames: []string{" vidi"},
},
"single word with suffixed space": {
match: "vici ",
expectedUsernames: []string{"vici"},
},
"multi-word with varying whitespace": {
match: "just me and\tmy friends \t",
expectedUsernames: []string{
"just",
"just me",
"just me and",
"just me and\tmy",
"just me and\tmy friends",
},
},
}
for testname, testcase := range testcases {
foundUsernames := enumerateUsernames(testcase.match)
assert.Equalf(t, testcase.expectedUsernames, foundUsernames, "Should have found the expected usernames for testcase %s", testname)
}
}