Matrix: switch to the mautrix-go library

Also: add initial support for [Matrix] application services

gateway/bridgemap/bmatrix.go

@@ -8,4 +8,5 @@ import (
 
 func init() {
 	FullMap["matrix"] = bmatrix.New
+	UserTypingSupport["matrix"] = struct{}{}
 }

gateway/gateway.go

@@ -323,11 +323,12 @@ func (gw *Gateway) ignoreFilesComment(extra map[string][]interface{}, igMessages
 	return false
 }
 
-func (gw *Gateway) modifyUsername(msg *config.Message, dest *bridge.Bridge) string {
+func (gw *Gateway) ModifyUsername(msg *config.Message, dest *bridge.Bridge) string {
 	if dest.GetBool("StripNick") {
 		re := regexp.MustCompile("[^a-zA-Z0-9]+")
 		msg.Username = re.ReplaceAllString(msg.Username, "")
 	}
+
 	nick := dest.GetString("RemoteNickFormat")
 
 	// loop to replace nicks
@@ -462,7 +463,7 @@ func (gw *Gateway) SendMessage(
 
 	msg.Channel = channel.Name
 	msg.Avatar = gw.modifyAvatar(rmsg, dest)
-	msg.Username = gw.modifyUsername(rmsg, dest)
+	msg.Username = gw.ModifyUsername(rmsg, dest)
 
 	// exclude file delete event as the msg ID here is the native file ID that needs to be deleted
 	if msg.Event != config.EventFileDelete {

gateway/router.go

@@ -75,7 +75,7 @@ func (r *Router) Start() error {
 		r.logger.Infof("Starting bridge: %s ", br.Account)
 		err := br.Connect()
 		if err != nil {
-			e := fmt.Errorf("Bridge %s failed to start: %v", br.Account, err)
+			e := fmt.Errorf("bridge %s failed to initialize: %v", br.Account, err)
 			if r.disableBridge(br, e) {
 				continue
 			}
@@ -83,12 +83,23 @@ func (r *Router) Start() error {
 		}
 		err = br.JoinChannels()
 		if err != nil {
-			e := fmt.Errorf("Bridge %s failed to join channel: %v", br.Account, err)
+			e := fmt.Errorf("bridge %s failed to join channel: %v", br.Account, err)
 			if r.disableBridge(br, e) {
 				continue
 			}
 			return e
 		}
+
+		if starter, ok := br.Bridger.(bridge.BridgerWithChannelDependency); ok {
+			err = starter.Start()
+			if err != nil {
+				e := fmt.Errorf("bridge %s failed to start: %v", br.Account, err)
+				if r.disableBridge(br, e) {
+					continue
+				}
+				return e
+			}
+		}
 	}
 	// remove unused bridges
 	for _, gw := range r.Gateways {