package gateway import ( "bytes" "fmt" "github.com/42wim/matterbridge/bridge" "github.com/42wim/matterbridge/bridge/config" log "github.com/Sirupsen/logrus" // "github.com/davecgh/go-spew/spew" "crypto/sha1" "github.com/hashicorp/golang-lru" "github.com/peterhellberg/emojilib" "net/http" "regexp" "strings" "time" ) type Gateway struct { *config.Config Router *Router MyConfig *config.Gateway Bridges map[string]*bridge.Bridge Channels map[string]*config.ChannelInfo ChannelOptions map[string]config.ChannelOptions Message chan config.Message Name string Messages *lru.Cache } type BrMsgID struct { br *bridge.Bridge ID string ChannelID string } func New(cfg config.Gateway, r *Router) *Gateway { gw := &Gateway{Channels: make(map[string]*config.ChannelInfo), Message: r.Message, Router: r, Bridges: make(map[string]*bridge.Bridge), Config: r.Config} cache, _ := lru.New(5000) gw.Messages = cache gw.AddConfig(&cfg) return gw } func (gw *Gateway) AddBridge(cfg *config.Bridge) error { br := gw.Router.getBridge(cfg.Account) if br == nil { br = bridge.New(gw.Config, cfg, gw.Message) } gw.mapChannelsToBridge(br) gw.Bridges[cfg.Account] = br return nil } func (gw *Gateway) AddConfig(cfg *config.Gateway) error { gw.Name = cfg.Name gw.MyConfig = cfg gw.mapChannels() for _, br := range append(gw.MyConfig.In, append(gw.MyConfig.InOut, gw.MyConfig.Out...)...) { err := gw.AddBridge(&br) if err != nil { return err } } return nil } func (gw *Gateway) mapChannelsToBridge(br *bridge.Bridge) { for ID, channel := range gw.Channels { if br.Account == channel.Account { br.Channels[ID] = *channel } } } func (gw *Gateway) reconnectBridge(br *bridge.Bridge) { br.Disconnect() time.Sleep(time.Second * 5) RECONNECT: log.Infof("Reconnecting %s", br.Account) err := br.Connect() if err != nil { log.Errorf("Reconnection failed: %s. Trying again in 60 seconds", err) time.Sleep(time.Second * 60) goto RECONNECT } br.Joined = make(map[string]bool) br.JoinChannels() } func (gw *Gateway) mapChannelConfig(cfg []config.Bridge, direction string) { for _, br := range cfg { if isApi(br.Account) { br.Channel = "api" } // make sure to lowercase irc channels in config #348 if strings.HasPrefix(br.Account, "irc.") { br.Channel = strings.ToLower(br.Channel) } ID := br.Channel + br.Account if _, ok := gw.Channels[ID]; !ok { channel := &config.ChannelInfo{Name: br.Channel, Direction: direction, ID: ID, Options: br.Options, Account: br.Account, SameChannel: make(map[string]bool)} channel.SameChannel[gw.Name] = br.SameChannel gw.Channels[channel.ID] = channel } else { // if we already have a key and it's not our current direction it means we have a bidirectional inout if gw.Channels[ID].Direction != direction { gw.Channels[ID].Direction = "inout" } } gw.Channels[ID].SameChannel[gw.Name] = br.SameChannel } } func (gw *Gateway) mapChannels() error { gw.mapChannelConfig(gw.MyConfig.In, "in") gw.mapChannelConfig(gw.MyConfig.Out, "out") gw.mapChannelConfig(gw.MyConfig.InOut, "inout") return nil } func (gw *Gateway) getDestChannel(msg *config.Message, dest bridge.Bridge) []config.ChannelInfo { var channels []config.ChannelInfo // for messages received from the api check that the gateway is the specified one if msg.Protocol == "api" && gw.Name != msg.Gateway { return channels } // if source channel is in only, do nothing for _, channel := range gw.Channels { // lookup the channel from the message if channel.ID == getChannelID(*msg) { // we only have destinations if the original message is from an "in" (sending) channel if !strings.Contains(channel.Direction, "in") { return channels } continue } } for _, channel := range gw.Channels { if _, ok := gw.Channels[getChannelID(*msg)]; !ok { continue } // do samechannelgateway logic if channel.SameChannel[msg.Gateway] { if msg.Channel == channel.Name && msg.Account != dest.Account { channels = append(channels, *channel) } continue } if strings.Contains(channel.Direction, "out") && channel.Account == dest.Account && gw.validGatewayDest(msg, channel) { channels = append(channels, *channel) } } return channels } func (gw *Gateway) handleMessage(msg config.Message, dest *bridge.Bridge) []*BrMsgID { var brMsgIDs []*BrMsgID // TODO refactor // only slack now, check will have to be done in the different bridges. // we need to check if we can't use fallback or text in other bridges if msg.Extra != nil { if dest.Protocol != "discord" && dest.Protocol != "slack" && dest.Protocol != "mattermost" && dest.Protocol != "telegram" && dest.Protocol != "matrix" && dest.Protocol != "xmpp" && len(msg.Extra[config.EVENT_FILE_FAILURE_SIZE]) == 0 { if msg.Text == "" { return brMsgIDs } } } // only relay join/part when configged if msg.Event == config.EVENT_JOIN_LEAVE && !gw.Bridges[dest.Account].Config.ShowJoinPart { return brMsgIDs } if msg.Event == config.EVENT_TOPIC_CHANGE && !gw.Bridges[dest.Account].Config.ShowTopicChange { return brMsgIDs } // broadcast to every out channel (irc QUIT) if msg.Channel == "" && msg.Event != config.EVENT_JOIN_LEAVE { log.Debug("empty channel") return brMsgIDs } originchannel := msg.Channel origmsg := msg channels := gw.getDestChannel(&msg, *dest) for _, channel := range channels { // do not send to ourself if channel.ID == getChannelID(origmsg) { continue } log.Debugf("Sending %#v from %s (%s) to %s (%s)", msg, msg.Account, originchannel, dest.Account, channel.Name) msg.Channel = channel.Name msg.Avatar = gw.modifyAvatar(origmsg, dest) msg.Username = gw.modifyUsername(origmsg, dest) msg.ID = "" if res, ok := gw.Messages.Get(origmsg.ID); ok { IDs := res.([]*BrMsgID) for _, id := range IDs { // check protocol, bridge name and channelname // for people that reuse the same bridge multiple times. see #342 if dest.Protocol == id.br.Protocol && dest.Name == id.br.Name && channel.ID == id.ChannelID { msg.ID = id.ID } } } // for api we need originchannel as channel if dest.Protocol == "api" { msg.Channel = originchannel } mID, err := dest.Send(msg) if err != nil { fmt.Println(err) } // append the message ID (mID) from this bridge (dest) to our brMsgIDs slice if mID != "" { brMsgIDs = append(brMsgIDs, &BrMsgID{dest, mID, channel.ID}) } } return brMsgIDs } func (gw *Gateway) ignoreMessage(msg *config.Message) bool { // if we don't have the bridge, ignore it if _, ok := gw.Bridges[msg.Account]; !ok { return true } if msg.Text == "" { // we have an attachment or actual bytes if msg.Extra != nil && (msg.Extra["attachments"] != nil || len(msg.Extra["file"]) > 0 || len(msg.Extra[config.EVENT_FILE_FAILURE_SIZE]) > 0) { return false } log.Debugf("ignoring empty message %#v from %s", msg, msg.Account) return true } for _, entry := range strings.Fields(gw.Bridges[msg.Account].Config.IgnoreNicks) { if msg.Username == entry { log.Debugf("ignoring %s from %s", msg.Username, msg.Account) return true } } // TODO do not compile regexps everytime for _, entry := range strings.Fields(gw.Bridges[msg.Account].Config.IgnoreMessages) { if entry != "" { re, err := regexp.Compile(entry) if err != nil { log.Errorf("incorrect regexp %s for %s", entry, msg.Account) continue } if re.MatchString(msg.Text) { log.Debugf("matching %s. ignoring %s from %s", entry, msg.Text, msg.Account) return true } } } return false } func (gw *Gateway) modifyUsername(msg config.Message, dest *bridge.Bridge) string { br := gw.Bridges[msg.Account] msg.Protocol = br.Protocol if gw.Config.General.StripNick || dest.Config.StripNick { re := regexp.MustCompile("[^a-zA-Z0-9]+") msg.Username = re.ReplaceAllString(msg.Username, "") } nick := dest.Config.RemoteNickFormat if nick == "" { nick = gw.Config.General.RemoteNickFormat } // loop to replace nicks for _, outer := range br.Config.ReplaceNicks { search := outer[0] replace := outer[1] // TODO move compile to bridge init somewhere re, err := regexp.Compile(search) if err != nil { log.Errorf("regexp in %s failed: %s", msg.Account, err) break } msg.Username = re.ReplaceAllString(msg.Username, replace) } if len(msg.Username) > 0 { // fix utf-8 issue #193 i := 0 for index := range msg.Username { if i == 1 { i = index break } i++ } nick = strings.Replace(nick, "{NOPINGNICK}", msg.Username[:i]+"​"+msg.Username[i:], -1) } nick = strings.Replace(nick, "{BRIDGE}", br.Name, -1) nick = strings.Replace(nick, "{PROTOCOL}", br.Protocol, -1) nick = strings.Replace(nick, "{NICK}", msg.Username, -1) return nick } func (gw *Gateway) modifyAvatar(msg config.Message, dest *bridge.Bridge) string { iconurl := gw.Config.General.IconURL if iconurl == "" { iconurl = dest.Config.IconURL } iconurl = strings.Replace(iconurl, "{NICK}", msg.Username, -1) if msg.Avatar == "" { msg.Avatar = iconurl } return msg.Avatar } func (gw *Gateway) modifyMessage(msg *config.Message) { // replace :emoji: to unicode msg.Text = emojilib.Replace(msg.Text) br := gw.Bridges[msg.Account] // loop to replace messages for _, outer := range br.Config.ReplaceMessages { search := outer[0] replace := outer[1] // TODO move compile to bridge init somewhere re, err := regexp.Compile(search) if err != nil { log.Errorf("regexp in %s failed: %s", msg.Account, err) break } msg.Text = re.ReplaceAllString(msg.Text, replace) } // messages from api have Gateway specified, don't overwrite if msg.Protocol != "api" { msg.Gateway = gw.Name } } func (gw *Gateway) handleFiles(msg *config.Message) { if msg.Extra == nil || gw.Config.General.MediaServerUpload == "" { return } if len(msg.Extra["file"]) > 0 { client := &http.Client{ Timeout: time.Second * 5, } for i, f := range msg.Extra["file"] { fi := f.(config.FileInfo) sha1sum := fmt.Sprintf("%x", sha1.Sum(*fi.Data)) reader := bytes.NewReader(*fi.Data) url := gw.Config.General.MediaServerUpload + "/" + sha1sum + "/" + fi.Name durl := gw.Config.General.MediaServerDownload + "/" + sha1sum + "/" + fi.Name extra := msg.Extra["file"][i].(config.FileInfo) extra.URL = durl extra.SHA = sha1sum msg.Extra["file"][i] = extra req, _ := http.NewRequest("PUT", url, reader) req.Header.Set("Content-Type", "binary/octet-stream") _, err := client.Do(req) if err != nil { log.Errorf("mediaserver upload failed: %#v", err) } log.Debugf("mediaserver download URL = %s", durl) } } } func getChannelID(msg config.Message) string { return msg.Channel + msg.Account } func (gw *Gateway) validGatewayDest(msg *config.Message, channel *config.ChannelInfo) bool { return msg.Gateway == gw.Name } func isApi(account string) bool { return strings.HasPrefix(account, "api.") }