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/ gateway gateway.go
1package gateway
2
3import (
4 "fmt"
5 "os"
6 "regexp"
7 "strings"
8 "time"
9
10 "github.com/d5/tengo/v2"
11 "github.com/d5/tengo/v2/stdlib"
12 lru "github.com/hashicorp/golang-lru"
13// "github.com/kyokomi/emoji/v2"
14 "github.com/matterbridge-org/matterbridge/bridge"
15 "github.com/matterbridge-org/matterbridge/bridge/config"
16 "github.com/matterbridge-org/matterbridge/internal"
17 "github.com/sirupsen/logrus"
18)
19
20type Gateway struct {
21 config.Config
22
23 Router *Router
24 MyConfig *config.Gateway
25 Bridges map[string]*bridge.Bridge
26 Channels map[string]*config.ChannelInfo
27 ChannelOptions map[string]config.ChannelOptions
28 Message chan config.Message
29 Name string
30 Messages *lru.Cache
31
32 logger *logrus.Entry
33}
34
35type BrMsgID struct {
36 br *bridge.Bridge
37 ID string
38 ChannelID string
39}
40
41const apiProtocol = "api"
42
43// New creates a new Gateway object associated with the specified router and
44// following the given configuration.
45func New(rootLogger *logrus.Logger, cfg *config.Gateway, r *Router) *Gateway {
46 logger := rootLogger.WithFields(logrus.Fields{"prefix": "gateway"})
47
48 cache, _ := lru.New(5000)
49 gw := &Gateway{
50 Channels: make(map[string]*config.ChannelInfo),
51 Message: r.Message,
52 Router: r,
53 Bridges: make(map[string]*bridge.Bridge),
54 Config: r.Config,
55 Messages: cache,
56 logger: logger,
57 }
58 if err := gw.AddConfig(cfg); err != nil {
59 logger.Errorf("Failed to add configuration to gateway: %#v", err)
60 }
61 return gw
62}
63
64// FindCanonicalMsgID returns the ID under which a message was stored in the cache.
65func (gw *Gateway) FindCanonicalMsgID(protocol string, mID string) string {
66 ID := protocol + " " + mID
67 if gw.Messages.Contains(ID) {
68 return ID
69 }
70
71 // If not keyed, iterate through cache for downstream, and infer upstream.
72 for _, mid := range gw.Messages.Keys() {
73 v, _ := gw.Messages.Peek(mid)
74 ids := v.([]*BrMsgID)
75 for _, downstreamMsgObj := range ids {
76 if ID == downstreamMsgObj.ID {
77 return mid.(string)
78 }
79 }
80 }
81 return ""
82}
83
84// AddBridge sets up a new bridge on startup.
85//
86// It's added in the gateway object with the specified configuration, and is
87// not triggered again on config change.
88func (gw *Gateway) AddBridge(cfg *config.Bridge) error {
89 br := gw.Router.getBridge(cfg.Account)
90 if br == nil {
91 gw.checkConfig(cfg)
92 br = bridge.New(cfg)
93 br.Config = gw.Router.Config
94 br.General = &gw.BridgeValues().General
95 br.Log = gw.logger.WithFields(logrus.Fields{"prefix": br.Protocol})
96
97 // Instantiate bridge's HTTP client
98 http_client, err := br.NewHttpClient(br.GetString("http_proxy"))
99 if err != nil {
100 br.Log.Fatalf("config failure for account %s, HTTP settings incorrect", br.Account)
101 }
102
103 br.HttpClient = http_client
104
105 brconfig := &bridge.Config{
106 Remote: gw.Message,
107 Bridge: br,
108 }
109 // add the actual bridger for this protocol to this bridge using the bridgeMap
110 if _, ok := gw.Router.BridgeMap[br.Protocol]; !ok {
111 gw.logger.Fatalf("Incorrect protocol %s specified in gateway configuration %s, exiting.", br.Protocol, cfg.Account)
112 }
113 br.Bridger = gw.Router.BridgeMap[br.Protocol](brconfig)
114 }
115 gw.mapChannelsToBridge(br)
116 gw.Bridges[cfg.Account] = br
117 return nil
118}
119
120// checkConfig checks a bridge config, on startup.
121//
122// This is not triggered when config is reloaded from disk.
123func (gw *Gateway) checkConfig(cfg *config.Bridge) {
124 match := false
125 for _, key := range gw.Router.Config.Viper().AllKeys() {
126 if strings.HasPrefix(key, strings.ToLower(cfg.Account)) {
127 match = true
128 break
129 }
130 }
131 if !match {
132 gw.logger.Fatalf("Account %s defined in gateway %s but no configuration found, exiting.", cfg.Account, gw.Name)
133 }
134}
135
136// AddConfig associates a new configuration with the gateway object.
137func (gw *Gateway) AddConfig(cfg *config.Gateway) error {
138 gw.Name = cfg.Name
139 gw.MyConfig = cfg
140 if err := gw.mapChannels(); err != nil {
141 gw.logger.Errorf("mapChannels() failed: %s", err)
142 }
143 for _, br := range append(gw.MyConfig.In, append(gw.MyConfig.InOut, gw.MyConfig.Out...)...) {
144 br := br // scopelint
145 err := gw.AddBridge(&br)
146 if err != nil {
147 return err
148 }
149 }
150 return nil
151}
152
153func (gw *Gateway) mapChannelsToBridge(br *bridge.Bridge) {
154 for ID, channel := range gw.Channels {
155 if br.Account == channel.Account {
156 br.Channels[ID] = *channel
157 }
158 }
159}
160
161func (gw *Gateway) reconnectBridge(br *bridge.Bridge) {
162 if err := br.Disconnect(); err != nil {
163 gw.logger.Errorf("Disconnect() %s failed: %s", br.Account, err)
164 }
165 time.Sleep(time.Second * 5)
166RECONNECT:
167 gw.logger.Infof("Reconnecting %s", br.Account)
168 err := br.Connect()
169 if err != nil {
170 gw.logger.Errorf("Reconnection failed: %s. Trying again in 60 seconds", err)
171 time.Sleep(time.Second * 60)
172 goto RECONNECT
173 }
174 br.Joined = make(map[string]bool)
175 if err := br.JoinChannels(); err != nil {
176 gw.logger.Errorf("JoinChannels() %s failed: %s", br.Account, err)
177 }
178}
179
180func (gw *Gateway) mapChannelConfig(cfg []config.Bridge, direction string) {
181 for _, br := range cfg {
182 if isAPI(br.Account) {
183 br.Channel = apiProtocol
184 }
185 // make sure to lowercase irc channels in config #348
186 if strings.HasPrefix(br.Account, "irc.") {
187 br.Channel = strings.ToLower(br.Channel)
188 }
189 if strings.HasPrefix(br.Account, "mattermost.") && strings.HasPrefix(br.Channel, "#") {
190 gw.logger.Errorf("Mattermost channels do not start with a #: remove the # in %s", br.Channel)
191 os.Exit(1)
192 }
193 if strings.HasPrefix(br.Account, "zulip.") && !strings.Contains(br.Channel, "/topic:") {
194 gw.logger.Errorf("Breaking change, since matterbridge 1.14.0 zulip channels need to specify the topic with channel/topic:mytopic in %s of %s", br.Channel, br.Account)
195 os.Exit(1)
196 }
197 ID := br.Channel + br.Account
198 if _, ok := gw.Channels[ID]; !ok {
199 channel := &config.ChannelInfo{
200 Name: br.Channel,
201 Direction: direction,
202 ID: ID,
203 Options: br.Options,
204 Account: br.Account,
205 SameChannel: make(map[string]bool),
206 }
207 channel.SameChannel[gw.Name] = br.SameChannel
208 gw.Channels[channel.ID] = channel
209 } else {
210 // if we already have a key and it's not our current direction it means we have a bidirectional inout
211 if gw.Channels[ID].Direction != direction {
212 gw.Channels[ID].Direction = "inout"
213 }
214 }
215 gw.Channels[ID].SameChannel[gw.Name] = br.SameChannel
216 }
217}
218
219func (gw *Gateway) mapChannels() error {
220 gw.mapChannelConfig(gw.MyConfig.In, "in")
221 gw.mapChannelConfig(gw.MyConfig.Out, "out")
222 gw.mapChannelConfig(gw.MyConfig.InOut, "inout")
223 return nil
224}
225
226func (gw *Gateway) getDestChannel(msg *config.Message, dest bridge.Bridge) []config.ChannelInfo {
227 var channels []config.ChannelInfo
228
229 // for messages received from the api check that the gateway is the specified one
230 if msg.Protocol == apiProtocol && gw.Name != msg.Gateway {
231 return channels
232 }
233
234 // discord join/leave is for the whole bridge, isn't a per channel join/leave
235 if msg.Event == config.EventJoinLeave && getProtocol(msg) == "discord" && msg.Channel == "" {
236 for _, channel := range gw.Channels {
237 if channel.Account == dest.Account && strings.Contains(channel.Direction, "out") &&
238 gw.validGatewayDest(msg) {
239 channels = append(channels, *channel)
240 }
241 }
242 return channels
243 }
244
245 // if source channel is in only, do nothing
246 for _, channel := range gw.Channels {
247 // lookup the channel from the message
248 if channel.ID == getChannelID(msg) {
249 // we only have destinations if the original message is from an "in" (sending) channel
250 if !strings.Contains(channel.Direction, "in") {
251 return channels
252 }
253 continue
254 }
255 }
256 for _, channel := range gw.Channels {
257 if _, ok := gw.Channels[getChannelID(msg)]; !ok {
258 continue
259 }
260
261 // do samechannelgateway logic
262 if channel.SameChannel[msg.Gateway] {
263 if msg.Channel == channel.Name && msg.Account != dest.Account {
264 channels = append(channels, *channel)
265 }
266 continue
267 }
268 if strings.Contains(channel.Direction, "out") && channel.Account == dest.Account && gw.validGatewayDest(msg) {
269 channels = append(channels, *channel)
270 }
271 }
272 return channels
273}
274
275func (gw *Gateway) getDestMsgID(msgID string, dest *bridge.Bridge, channel *config.ChannelInfo) string {
276 if res, ok := gw.Messages.Get(msgID); ok {
277 IDs := res.([]*BrMsgID)
278 for _, id := range IDs {
279 // check protocol, bridge name and channelname
280 // for people that reuse the same bridge multiple times. see #342
281 if dest.Protocol == id.br.Protocol && dest.Name == id.br.Name && channel.ID == id.ChannelID {
282 return strings.Replace(id.ID, dest.Protocol+" ", "", 1)
283 }
284 }
285 }
286 return ""
287}
288
289// ignoreTextEmpty returns true if we need to ignore a message with an empty text.
290func (gw *Gateway) ignoreTextEmpty(msg *config.Message) bool {
291 if msg.Text != "" {
292 return false
293 }
294 if msg.Event == config.EventUserTyping {
295 return false
296 }
297 // we have an attachment or actual bytes, do not ignore
298 if msg.Extra != nil &&
299 (msg.Extra["attachments"] != nil ||
300 len(msg.Extra["file"]) > 0 ||
301 len(msg.Extra[config.EventFileFailureSize]) > 0) {
302 return false
303 }
304 gw.logger.Debugf("ignoring empty message %#v from %s", msg, msg.Account)
305 return true
306}
307
308func (gw *Gateway) ignoreMessage(msg *config.Message) bool {
309 // if we don't have the bridge, ignore it
310 if _, ok := gw.Bridges[msg.Account]; !ok {
311 return true
312 }
313
314 igNicks := strings.Fields(gw.Bridges[msg.Account].GetString("IgnoreNicks"))
315 igMessages := strings.Fields(gw.Bridges[msg.Account].GetString("IgnoreMessages"))
316 if gw.ignoreTextEmpty(msg) || gw.ignoreText(msg.Username, igNicks) || gw.ignoreText(msg.Text, igMessages) || gw.ignoreFilesComment(msg.Extra, igMessages) {
317 return true
318 }
319
320 return false
321}
322
323// ignoreFilesComment returns true if we need to ignore a file with matched comment.
324func (gw *Gateway) ignoreFilesComment(extra map[string][]interface{}, igMessages []string) bool {
325 if extra == nil {
326 return false
327 }
328 for _, f := range extra["file"] {
329 fi, ok := f.(config.FileInfo)
330 if !ok {
331 continue
332 }
333 if gw.ignoreText(fi.Comment, igMessages) {
334 return true
335 }
336 }
337 return false
338}
339
340func (gw *Gateway) modifyUsername(msg *config.Message, dest *bridge.Bridge) string {
341 if dest.GetBool("StripNick") {
342 re := regexp.MustCompile("[^a-zA-Z0-9]+")
343 msg.Username = re.ReplaceAllString(msg.Username, "")
344 }
345 nick := dest.GetString("RemoteNickFormat")
346
347 // loop to replace nicks
348 br := gw.Bridges[msg.Account]
349 for _, outer := range br.GetStringSlice2D("ReplaceNicks") {
350 search := outer[0]
351 replace := outer[1]
352 // TODO move compile to bridge init somewhere
353 re, err := regexp.Compile(search)
354 if err != nil {
355 gw.logger.Errorf("regexp in %s failed: %s", msg.Account, err)
356 break
357 }
358 msg.Username = re.ReplaceAllString(msg.Username, replace)
359 }
360
361 if len(msg.Username) > 0 {
362 // fix utf-8 issue #193
363 i := 0
364 for index := range msg.Username {
365 if i == 1 {
366 i = index
367 break
368 }
369 i++
370 }
371 nick = strings.ReplaceAll(nick, "{NOPINGNICK}", msg.Username[:i]+"\u200b"+msg.Username[i:])
372 }
373
374 nick = strings.ReplaceAll(nick, "{BRIDGE}", br.Name)
375 nick = strings.ReplaceAll(nick, "{PROTOCOL}", br.Protocol)
376 nick = strings.ReplaceAll(nick, "{GATEWAY}", gw.Name)
377 nick = strings.ReplaceAll(nick, "{LABEL}", br.GetString("Label"))
378 nick = strings.ReplaceAll(nick, "{NICK}", msg.Username)
379 nick = strings.ReplaceAll(nick, "{USERID}", msg.UserID)
380 nick = strings.ReplaceAll(nick, "{CHANNEL}", msg.Channel)
381 tengoNick, err := gw.modifyUsernameTengo(msg, br)
382 if err != nil {
383 gw.logger.Errorf("modifyUsernameTengo error: %s", err)
384 }
385 nick = strings.ReplaceAll(nick, "{TENGO}", tengoNick)
386 return nick
387}
388
389func (gw *Gateway) modifyAvatar(msg *config.Message, dest *bridge.Bridge) string {
390 iconurl := dest.GetString("IconURL")
391 iconurl = strings.ReplaceAll(iconurl, "{NICK}", msg.Username)
392 if msg.Avatar == "" {
393 msg.Avatar = iconurl
394 }
395 return msg.Avatar
396}
397
398func (gw *Gateway) modifyMessage(msg *config.Message) {
399 if gw.BridgeValues().General.TengoModifyMessage != "" {
400 gw.logger.Warnf("General TengoModifyMessage=%s is deprecated and will be removed in v1.20.0, please move to Tengo InMessage=%s", gw.BridgeValues().General.TengoModifyMessage, gw.BridgeValues().General.TengoModifyMessage)
401 }
402
403 if err := modifyInMessageTengo(gw.BridgeValues().General.TengoModifyMessage, msg); err != nil {
404 gw.logger.Errorf("TengoModifyMessage failed: %s", err)
405 }
406
407 inMessage := gw.BridgeValues().Tengo.InMessage
408 if inMessage == "" {
409 inMessage = gw.BridgeValues().Tengo.Message
410 if inMessage != "" {
411 gw.logger.Warnf("Tengo Message=%s is deprecated and will be removed in v1.20.0, please move to Tengo InMessage=%s", inMessage, inMessage)
412 }
413 }
414
415 if err := modifyInMessageTengo(inMessage, msg); err != nil {
416 gw.logger.Errorf("Tengo.Message failed: %s", err)
417 }
418
419 // replace :emoji: to unicode
420// emoji.ReplacePadding = ""
421// msg.Text = emoji.Sprint(msg.Text)
422
423 br := gw.Bridges[msg.Account]
424 // loop to replace messages
425 for _, outer := range br.GetStringSlice2D("ReplaceMessages") {
426 search := outer[0]
427 replace := outer[1]
428 // TODO move compile to bridge init somewhere
429 re, err := regexp.Compile(search)
430 if err != nil {
431 gw.logger.Errorf("regexp in %s failed: %s", msg.Account, err)
432 break
433 }
434 msg.Text = re.ReplaceAllString(msg.Text, replace)
435 }
436
437 gw.handleExtractNicks(msg)
438
439 // messages from api have Gateway specified, don't overwrite
440 if msg.Protocol != apiProtocol {
441 msg.Gateway = gw.Name
442 }
443}
444
445// SendMessage sends a message (with specified parentID) to the channel on the selected
446// destination bridge and returns a message ID or an error.
447func (gw *Gateway) SendMessage(
448 rmsg *config.Message,
449 dest *bridge.Bridge,
450 channel *config.ChannelInfo,
451 canonicalParentMsgID string,
452) (string, error) {
453 msg := *rmsg
454 // Only send the avatar download event to ourselves.
455 if msg.Event == config.EventAvatarDownload {
456 if channel.ID != getChannelID(rmsg) {
457 return "", nil
458 }
459 } else {
460 // do not send to ourself for any other event
461 if channel.ID == getChannelID(rmsg) {
462 return "", nil
463 }
464 }
465
466 // Only send irc notices to irc
467 if msg.Event == config.EventNoticeIRC && dest.Protocol != "irc" {
468 return "", nil
469 }
470
471 // Too noisy to log like other events
472 debugSendMessage := ""
473 if msg.Event != config.EventUserTyping {
474 debugSendMessage = fmt.Sprintf("=> Sending %#v from %s (%s) to %s (%s)", msg, msg.Account, rmsg.Channel, dest.Account, channel.Name)
475 }
476
477 msg.Channel = channel.Name
478 msg.Avatar = gw.modifyAvatar(rmsg, dest)
479 msg.Username = gw.modifyUsername(rmsg, dest)
480
481 // exclude file delete event as the msg ID here is the native file ID that needs to be deleted
482 if msg.Event != config.EventFileDelete {
483 msg.ID = gw.getDestMsgID(rmsg.Protocol+" "+rmsg.ID, dest, channel)
484 }
485
486 // for api we need originchannel as channel
487 if dest.Protocol == apiProtocol {
488 msg.Channel = rmsg.Channel
489 }
490
491 msg.ParentID = gw.getDestMsgID(canonicalParentMsgID, dest, channel)
492 if msg.ParentID == "" {
493 msg.ParentID = strings.Replace(canonicalParentMsgID, dest.Protocol+" ", "", 1)
494 }
495
496 // if the parentID is still empty and we have a parentID set in the original message
497 // this means that we didn't find it in the cache so set it to a "msg-parent-not-found" constant
498 if msg.ParentID == "" && rmsg.ParentID != "" {
499 msg.ParentID = config.ParentIDNotFound
500 }
501
502 drop, err := gw.modifyOutMessageTengo(rmsg, &msg, dest)
503 if err != nil {
504 gw.logger.Errorf("modifySendMessageTengo: %s", err)
505 }
506
507 if drop {
508 gw.logger.Debugf("=> Tengo dropping %#v from %s (%s) to %s (%s)", msg, msg.Account, rmsg.Channel, dest.Account, channel.Name)
509 return "", nil
510 }
511
512 if debugSendMessage != "" {
513 gw.logger.Debug(debugSendMessage)
514 }
515 // if we are using mattermost plugin account, send messages to MattermostPlugin channel
516 // that can be picked up by the mattermost matterbridge plugin
517 if dest.Account == "mattermost.plugin" {
518 gw.Router.MattermostPlugin <- msg
519 }
520
521 defer func(t time.Time) {
522 gw.logger.Debugf("=> Send from %s (%s) to %s (%s) took %s", msg.Account, rmsg.Channel, dest.Account, channel.Name, time.Since(t))
523 }(time.Now())
524
525 mID, err := dest.Send(msg)
526 if err != nil {
527 return mID, err
528 }
529
530 // append the message ID (mID) from this bridge (dest) to our brMsgIDs slice
531 if mID != "" {
532 gw.logger.Debugf("mID %s: %s", dest.Account, mID)
533 return mID, nil
534 // brMsgIDs = append(brMsgIDs, &BrMsgID{dest, dest.Protocol + " " + mID, channel.ID})
535 }
536 return "", nil
537}
538
539func (gw *Gateway) validGatewayDest(msg *config.Message) bool {
540 return msg.Gateway == gw.Name
541}
542
543func getChannelID(msg *config.Message) string {
544 return msg.Channel + msg.Account
545}
546
547func isAPI(account string) bool {
548 return strings.HasPrefix(account, "api.")
549}
550
551// ignoreText returns true if text matches any of the input regexes.
552func (gw *Gateway) ignoreText(text string, input []string) bool {
553 for _, entry := range input {
554 if entry == "" {
555 continue
556 }
557 // TODO do not compile regexps everytime
558 re, err := regexp.Compile(entry)
559 if err != nil {
560 gw.logger.Errorf("incorrect regexp %s", entry)
561 continue
562 }
563 if re.MatchString(text) {
564 gw.logger.Debugf("matching %s. ignoring %s", entry, text)
565 return true
566 }
567 }
568 return false
569}
570
571func getProtocol(msg *config.Message) string {
572 p := strings.Split(msg.Account, ".")
573 return p[0]
574}
575
576func modifyInMessageTengo(filename string, msg *config.Message) error {
577 if filename == "" {
578 return nil
579 }
580
581 res, err := os.ReadFile(filename) //nolint:gosec
582 if err != nil {
583 return err
584 }
585 s := tengo.NewScript(res)
586 s.SetImports(stdlib.GetModuleMap(stdlib.AllModuleNames()...))
587 _ = s.Add("msgText", msg.Text)
588 _ = s.Add("msgUsername", msg.Username)
589 _ = s.Add("msgUserID", msg.UserID)
590 _ = s.Add("msgAccount", msg.Account)
591 _ = s.Add("msgChannel", msg.Channel)
592 c, err := s.Compile()
593 if err != nil {
594 return err
595 }
596 if err := c.Run(); err != nil {
597 return err
598 }
599 msg.Text = c.Get("msgText").String()
600 msg.Username = c.Get("msgUsername").String()
601 return nil
602}
603
604func (gw *Gateway) modifyUsernameTengo(msg *config.Message, br *bridge.Bridge) (string, error) {
605 filename := gw.BridgeValues().Tengo.RemoteNickFormat
606 if filename == "" {
607 return "", nil
608 }
609
610 res, err := os.ReadFile(filename) //nolint:gosec
611 if err != nil {
612 return "", err
613 }
614 s := tengo.NewScript(res)
615 s.SetImports(stdlib.GetModuleMap(stdlib.AllModuleNames()...))
616 _ = s.Add("result", "")
617 _ = s.Add("msgText", msg.Text)
618 _ = s.Add("msgUsername", msg.Username)
619 _ = s.Add("msgUserID", msg.UserID)
620 _ = s.Add("nick", msg.Username)
621 _ = s.Add("msgAccount", msg.Account)
622 _ = s.Add("msgChannel", msg.Channel)
623 _ = s.Add("channel", msg.Channel)
624 _ = s.Add("msgProtocol", msg.Protocol)
625 _ = s.Add("remoteAccount", br.Account)
626 _ = s.Add("protocol", br.Protocol)
627 _ = s.Add("bridge", br.Name)
628 _ = s.Add("gateway", gw.Name)
629 c, err := s.Compile()
630 if err != nil {
631 return "", err
632 }
633 if err := c.Run(); err != nil {
634 return "", err
635 }
636 return c.Get("result").String(), nil
637}
638
639func (gw *Gateway) modifyOutMessageTengo(origmsg *config.Message, msg *config.Message, br *bridge.Bridge) (bool, error) {
640 filename := gw.BridgeValues().Tengo.OutMessage
641 var (
642 res []byte
643 err error
644 drop bool
645 )
646
647 if filename == "" {
648 res, err = internal.Asset("tengo/outmessage.tengo")
649 if err != nil {
650 return drop, err
651 }
652 } else {
653 res, err = os.ReadFile(filename) //nolint:gosec
654 if err != nil {
655 return drop, err
656 }
657 }
658
659 s := tengo.NewScript(res)
660
661 s.SetImports(stdlib.GetModuleMap(stdlib.AllModuleNames()...))
662 _ = s.Add("inAccount", origmsg.Account)
663 _ = s.Add("inProtocol", origmsg.Protocol)
664 _ = s.Add("inChannel", origmsg.Channel)
665 _ = s.Add("inGateway", origmsg.Gateway)
666 _ = s.Add("inEvent", origmsg.Event)
667 _ = s.Add("outAccount", br.Account)
668 _ = s.Add("outProtocol", br.Protocol)
669 _ = s.Add("outChannel", msg.Channel)
670 _ = s.Add("outGateway", gw.Name)
671 _ = s.Add("outEvent", msg.Event)
672 _ = s.Add("msgText", msg.Text)
673 _ = s.Add("msgUsername", msg.Username)
674 _ = s.Add("msgUserID", msg.UserID)
675 _ = s.Add("msgDrop", drop)
676 c, err := s.Compile()
677 if err != nil {
678 return drop, err
679 }
680
681 if err := c.Run(); err != nil {
682 return drop, err
683 }
684
685 drop = c.Get("msgDrop").Bool()
686 msg.Text = c.Get("msgText").String()
687 msg.Username = c.Get("msgUsername").String()
688
689 return drop, nil
690}
691