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package gateway
import (
"fmt"
"sync"
"time"
"github.com/42wim/matterbridge/bridge"
"github.com/42wim/matterbridge/bridge/config"
"github.com/42wim/matterbridge/gateway/samechannel"
"github.com/sirupsen/logrus"
)
type Router struct {
config.Config
sync.RWMutex
BridgeMap map[string]bridge.Factory
Gateways map[string]*Gateway
Message chan config.Message
MattermostPlugin chan config.Message
logger *logrus.Entry
}
// NewRouter initializes a new Matterbridge router for the specified configuration and
// sets up all required gateways.
func NewRouter(rootLogger *logrus.Logger, cfg config.Config, bridgeMap map[string]bridge.Factory) (*Router, error) {
logger := rootLogger.WithFields(logrus.Fields{"prefix": "router"})
r := &Router{
Config: cfg,
BridgeMap: bridgeMap,
Message: make(chan config.Message),
MattermostPlugin: make(chan config.Message),
Gateways: make(map[string]*Gateway),
logger: logger,
}
sgw := samechannel.New(cfg)
gwconfigs := append(sgw.GetConfig(), cfg.BridgeValues().Gateway...)
for idx := range gwconfigs {
entry := &gwconfigs[idx]
if !entry.Enable {
continue
}
if entry.Name == "" {
return nil, fmt.Errorf("%s", "Gateway without name found")
}
if _, ok := r.Gateways[entry.Name]; ok {
return nil, fmt.Errorf("Gateway with name %s already exists", entry.Name)
}
r.Gateways[entry.Name] = New(rootLogger, entry, r)
}
return r, nil
}
// Start will connect all gateways belonging to this router and subsequently route messages
// between them.
func (r *Router) Start() error {
m := make(map[string]*bridge.Bridge)
if len(r.Gateways) == 0 {
return fmt.Errorf("no [[gateway]] configured. See https://github.com/42wim/matterbridge/wiki/How-to-create-your-config for more info")
}
for _, gw := range r.Gateways {
r.logger.Infof("Parsing gateway %s", gw.Name)
if len(gw.Bridges) == 0 {
return fmt.Errorf("no bridges configured for gateway %s. See https://github.com/42wim/matterbridge/wiki/How-to-create-your-config for more info", gw.Name)
}
for _, br := range gw.Bridges {
m[br.Account] = br
}
}
for _, br := range m {
r.logger.Infof("Starting bridge: %s ", br.Account)
err := br.Connect()
if err != nil {
e := fmt.Errorf("bridge %s failed to initialize: %v", br.Account, err)
if r.disableBridge(br, e) {
continue
}
return e
}
err = br.JoinChannels()
if err != nil {
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 {
for i, br := range gw.Bridges {
if br.Bridger == nil {
r.logger.Errorf("removing failed bridge %s", i)
delete(gw.Bridges, i)
}
}
}
go r.handleReceive()
//go r.updateChannelMembers()
return nil
}
// disableBridge returns true and empties a bridge if we have IgnoreFailureOnStart configured
// otherwise returns false
func (r *Router) disableBridge(br *bridge.Bridge, err error) bool {
if r.BridgeValues().General.IgnoreFailureOnStart {
r.logger.Error(err)
// setting this bridge empty
*br = bridge.Bridge{
Log: br.Log,
}
return true
}
return false
}
func (r *Router) getBridge(account string) *bridge.Bridge {
for _, gw := range r.Gateways {
if br, ok := gw.Bridges[account]; ok {
return br
}
}
return nil
}
func (r *Router) handleReceive() {
for msg := range r.Message {
msg := msg // scopelint
r.handleEventGetChannelMembers(&msg)
r.handleEventFailure(&msg)
r.handleEventRejoinChannels(&msg)
// Set message protocol based on the account it came from
msg.Protocol = r.getBridge(msg.Account).Protocol
filesHandled := false
for _, gw := range r.Gateways {
// record all the message ID's of the different bridges
var msgIDs []*BrMsgID
if gw.ignoreMessage(&msg) {
continue
}
msg.Timestamp = time.Now()
gw.modifyMessage(&msg)
if !filesHandled {
gw.handleFiles(&msg)
filesHandled = true
}
for _, br := range gw.Bridges {
msgIDs = append(msgIDs, gw.handleMessage(&msg, br)...)
}
if msg.ID != "" {
_, exists := gw.Messages.Get(msg.Protocol + " " + msg.ID)
// Only add the message ID if it doesn't already exist
//
// For some bridges we always add/update the message ID.
// This is necessary as msgIDs will change if a bridge returns
// a different ID in response to edits.
if !exists {
gw.Messages.Add(msg.Protocol+" "+msg.ID, msgIDs)
}
}
}
}
}
// updateChannelMembers sends every minute an GetChannelMembers event to all bridges.
func (r *Router) updateChannelMembers() {
// TODO sleep a minute because slack can take a while
// fix this by having actually connectionDone events send to the router
time.Sleep(time.Minute)
for {
for _, gw := range r.Gateways {
for _, br := range gw.Bridges {
// only for slack now
if br.Protocol != "slack" {
continue
}
r.logger.Debugf("sending %s to %s", config.EventGetChannelMembers, br.Account)
if _, err := br.Send(config.Message{Event: config.EventGetChannelMembers}); err != nil {
r.logger.Errorf("updateChannelMembers: %s", err)
}
}
}
time.Sleep(time.Minute)
}
}
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