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package gateway
import (
"fmt"
"github.com/42wim/matterbridge/bridge"
"github.com/42wim/matterbridge/bridge/config"
log "github.com/Sirupsen/logrus"
"reflect"
"strings"
)
type Gateway struct {
*config.Config
MyConfig *config.Gateway
Bridges []bridge.Bridge
ChannelsOut map[string][]string
ChannelsIn map[string][]string
ignoreNicks map[string][]string
Name string
}
func New(cfg *config.Config, gateway *config.Gateway) error {
c := make(chan config.Message)
gw := &Gateway{}
gw.Name = gateway.Name
gw.Config = cfg
gw.MyConfig = gateway
exists := make(map[string]bool)
for _, br := range append(gateway.In, gateway.Out...) {
if exists[br.Account] {
continue
}
log.Infof("Starting bridge: %s channel: %s", br.Account, br.Channel)
gw.Bridges = append(gw.Bridges, bridge.New(cfg, &br, c))
exists[br.Account] = true
}
gw.mapChannels()
//TODO fix mapIgnores
//gw.mapIgnores()
exists = make(map[string]bool)
for _, br := range gw.Bridges {
err := br.Connect()
if err != nil {
log.Fatalf("Bridge %s failed to start: %v", br.FullOrigin(), err)
}
for _, channel := range append(gw.ChannelsOut[br.FullOrigin()], gw.ChannelsIn[br.FullOrigin()]...) {
if exists[br.FullOrigin()+channel] {
continue
}
log.Infof("%s: joining %s", br.FullOrigin(), channel)
br.JoinChannel(channel)
exists[br.FullOrigin()+channel] = true
}
}
gw.handleReceive(c)
return nil
}
func (gw *Gateway) handleReceive(c chan config.Message) {
for {
select {
case msg := <-c:
for _, br := range gw.Bridges {
gw.handleMessage(msg, br)
}
}
}
}
func (gw *Gateway) mapChannels() error {
m := make(map[string][]string)
for _, br := range gw.MyConfig.Out {
m[br.Account] = append(m[br.Account], br.Channel)
}
gw.ChannelsOut = m
m = nil
m = make(map[string][]string)
for _, br := range gw.MyConfig.In {
m[br.Account] = append(m[br.Account], br.Channel)
}
gw.ChannelsIn = m
return nil
}
func (gw *Gateway) mapIgnores() {
m := make(map[string][]string)
for _, br := range gw.MyConfig.In {
accInfo := strings.Split(br.Account, ".")
m[br.Account] = strings.Fields(gw.Config.IRC[accInfo[1]].IgnoreNicks)
}
gw.ignoreNicks = m
}
func (gw *Gateway) getDestChannel(msg *config.Message, dest string) []string {
channels := gw.ChannelsIn[msg.FullOrigin]
for _, channel := range channels {
if channel == msg.Channel {
return gw.ChannelsOut[dest]
}
}
return []string{}
}
func (gw *Gateway) handleMessage(msg config.Message, dest bridge.Bridge) {
if gw.ignoreMessage(&msg) {
return
}
originchannel := msg.Channel
channels := gw.getDestChannel(&msg, dest.FullOrigin())
for _, channel := range channels {
// do not send the message to the bridge we come from if also the channel is the same
if msg.FullOrigin == dest.FullOrigin() && channel == originchannel {
continue
}
msg.Channel = channel
if msg.Channel == "" {
log.Debug("empty channel")
return
}
gw.modifyMessage(&msg, dest)
log.Debugf("Sending %#v from %s (%s) to %s (%s)", msg, msg.FullOrigin, originchannel, dest.FullOrigin(), channel)
err := dest.Send(msg)
if err != nil {
fmt.Println(err)
}
}
}
func (gw *Gateway) ignoreMessage(msg *config.Message) bool {
// should we discard messages ?
for _, entry := range gw.ignoreNicks[msg.FullOrigin] {
if msg.Username == entry {
return true
}
}
return false
}
func (gw *Gateway) modifyMessage(msg *config.Message, dest bridge.Bridge) {
val := reflect.ValueOf(gw.Config).Elem()
for i := 0; i < val.NumField(); i++ {
typeField := val.Type().Field(i)
// look for the protocol map (both lowercase)
if strings.ToLower(typeField.Name) == dest.Protocol() {
// get the Protocol struct from the map
protoCfg := val.Field(i).MapIndex(reflect.ValueOf(dest.Origin()))
setNickFormat(msg, protoCfg.Interface().(config.Protocol))
val.Field(i).SetMapIndex(reflect.ValueOf(dest.Origin()), protoCfg)
break
}
}
}
func setNickFormat(msg *config.Message, cfg config.Protocol) {
format := cfg.RemoteNickFormat
msg.Username = strings.Replace(format, "{NICK}", msg.Username, -1)
msg.Username = strings.Replace(msg.Username, "{BRIDGE}", msg.Origin, -1)
msg.Username = strings.Replace(msg.Username, "{PROTOCOL}", msg.Protocol, -1)
}
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