forked from jshiffer/matterbridge
8a875f292e
Revert "Fix typo" This reverts commitdffd67eb31. Revert "Handle quit message relay better on gateways with one channel on the irc bridge #722" This reverts commit240559581a. Revert "Support quits from irc correctly. Fixes #722 (#724)" This reverts commitd76a04bd0a.
506 lines
14 KiB
Go
506 lines
14 KiB
Go
package gateway
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import (
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"io/ioutil"
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"os"
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"regexp"
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"strings"
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"time"
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"github.com/42wim/matterbridge/bridge"
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"github.com/42wim/matterbridge/bridge/config"
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"github.com/d5/tengo/script"
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"github.com/d5/tengo/stdlib"
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lru "github.com/hashicorp/golang-lru"
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"github.com/peterhellberg/emojilib"
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"github.com/sirupsen/logrus"
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)
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type Gateway struct {
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config.Config
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Router *Router
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MyConfig *config.Gateway
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Bridges map[string]*bridge.Bridge
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Channels map[string]*config.ChannelInfo
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ChannelOptions map[string]config.ChannelOptions
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Message chan config.Message
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Name string
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Messages *lru.Cache
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logger *logrus.Entry
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}
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type BrMsgID struct {
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br *bridge.Bridge
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ID string
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ChannelID string
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}
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const apiProtocol = "api"
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// New creates a new Gateway object associated with the specified router and
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// following the given configuration.
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func New(rootLogger *logrus.Logger, cfg *config.Gateway, r *Router) *Gateway {
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logger := rootLogger.WithFields(logrus.Fields{"prefix": "gateway"})
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cache, _ := lru.New(5000)
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gw := &Gateway{
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Channels: make(map[string]*config.ChannelInfo),
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Message: r.Message,
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Router: r,
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Bridges: make(map[string]*bridge.Bridge),
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Config: r.Config,
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Messages: cache,
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logger: logger,
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}
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if err := gw.AddConfig(cfg); err != nil {
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logger.Errorf("Failed to add configuration to gateway: %#v", err)
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}
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return gw
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}
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// FindCanonicalMsgID returns the ID under which a message was stored in the cache.
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func (gw *Gateway) FindCanonicalMsgID(protocol string, mID string) string {
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ID := protocol + " " + mID
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if gw.Messages.Contains(ID) {
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return mID
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}
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// If not keyed, iterate through cache for downstream, and infer upstream.
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for _, mid := range gw.Messages.Keys() {
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v, _ := gw.Messages.Peek(mid)
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ids := v.([]*BrMsgID)
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for _, downstreamMsgObj := range ids {
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if ID == downstreamMsgObj.ID {
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return strings.Replace(mid.(string), protocol+" ", "", 1)
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}
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}
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}
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return ""
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}
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// AddBridge sets up a new bridge in the gateway object with the specified configuration.
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func (gw *Gateway) AddBridge(cfg *config.Bridge) error {
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br := gw.Router.getBridge(cfg.Account)
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if br == nil {
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br = bridge.New(cfg)
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br.Config = gw.Router.Config
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br.General = &gw.BridgeValues().General
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br.Log = gw.logger.WithFields(logrus.Fields{"prefix": br.Protocol})
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brconfig := &bridge.Config{
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Remote: gw.Message,
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Bridge: br,
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}
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// add the actual bridger for this protocol to this bridge using the bridgeMap
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if _, ok := gw.Router.BridgeMap[br.Protocol]; !ok {
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gw.logger.Fatalf("Incorrect protocol %s specified in gateway configuration %s, exiting.", br.Protocol, cfg.Account)
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}
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br.Bridger = gw.Router.BridgeMap[br.Protocol](brconfig)
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}
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gw.mapChannelsToBridge(br)
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gw.Bridges[cfg.Account] = br
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return nil
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}
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// AddConfig associates a new configuration with the gateway object.
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func (gw *Gateway) AddConfig(cfg *config.Gateway) error {
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gw.Name = cfg.Name
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gw.MyConfig = cfg
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if err := gw.mapChannels(); err != nil {
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gw.logger.Errorf("mapChannels() failed: %s", err)
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}
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for _, br := range append(gw.MyConfig.In, append(gw.MyConfig.InOut, gw.MyConfig.Out...)...) {
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br := br //scopelint
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err := gw.AddBridge(&br)
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if err != nil {
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return err
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}
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}
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return nil
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}
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func (gw *Gateway) mapChannelsToBridge(br *bridge.Bridge) {
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for ID, channel := range gw.Channels {
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if br.Account == channel.Account {
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br.Channels[ID] = *channel
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}
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}
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}
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func (gw *Gateway) reconnectBridge(br *bridge.Bridge) {
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if err := br.Disconnect(); err != nil {
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gw.logger.Errorf("Disconnect() %s failed: %s", br.Account, err)
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}
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time.Sleep(time.Second * 5)
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RECONNECT:
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gw.logger.Infof("Reconnecting %s", br.Account)
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err := br.Connect()
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if err != nil {
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gw.logger.Errorf("Reconnection failed: %s. Trying again in 60 seconds", err)
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time.Sleep(time.Second * 60)
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goto RECONNECT
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}
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br.Joined = make(map[string]bool)
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if err := br.JoinChannels(); err != nil {
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gw.logger.Errorf("JoinChannels() %s failed: %s", br.Account, err)
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}
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}
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func (gw *Gateway) mapChannelConfig(cfg []config.Bridge, direction string) {
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for _, br := range cfg {
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if isAPI(br.Account) {
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br.Channel = apiProtocol
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}
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// make sure to lowercase irc channels in config #348
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if strings.HasPrefix(br.Account, "irc.") {
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br.Channel = strings.ToLower(br.Channel)
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}
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if strings.HasPrefix(br.Account, "mattermost.") && strings.HasPrefix(br.Channel, "#") {
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gw.logger.Errorf("Mattermost channels do not start with a #: remove the # in %s", br.Channel)
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os.Exit(1)
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}
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if strings.HasPrefix(br.Account, "zulip.") && !strings.Contains(br.Channel, "/topic:") {
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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)
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os.Exit(1)
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}
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ID := br.Channel + br.Account
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if _, ok := gw.Channels[ID]; !ok {
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channel := &config.ChannelInfo{
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Name: br.Channel,
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Direction: direction,
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ID: ID,
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Options: br.Options,
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Account: br.Account,
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SameChannel: make(map[string]bool),
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}
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channel.SameChannel[gw.Name] = br.SameChannel
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gw.Channels[channel.ID] = channel
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} else {
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// if we already have a key and it's not our current direction it means we have a bidirectional inout
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if gw.Channels[ID].Direction != direction {
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gw.Channels[ID].Direction = "inout"
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}
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}
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gw.Channels[ID].SameChannel[gw.Name] = br.SameChannel
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}
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}
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func (gw *Gateway) mapChannels() error {
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gw.mapChannelConfig(gw.MyConfig.In, "in")
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gw.mapChannelConfig(gw.MyConfig.Out, "out")
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gw.mapChannelConfig(gw.MyConfig.InOut, "inout")
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return nil
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}
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func (gw *Gateway) getDestChannel(msg *config.Message, dest bridge.Bridge) []config.ChannelInfo {
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var channels []config.ChannelInfo
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// for messages received from the api check that the gateway is the specified one
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if msg.Protocol == apiProtocol && gw.Name != msg.Gateway {
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return channels
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}
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// discord join/leave is for the whole bridge, isn't a per channel join/leave
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if msg.Event == config.EventJoinLeave && getProtocol(msg) == "discord" && msg.Channel == "" {
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for _, channel := range gw.Channels {
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if channel.Account == dest.Account && strings.Contains(channel.Direction, "out") &&
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gw.validGatewayDest(msg) {
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channels = append(channels, *channel)
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}
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}
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return channels
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}
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// if source channel is in only, do nothing
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for _, channel := range gw.Channels {
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// lookup the channel from the message
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if channel.ID == getChannelID(msg) {
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// we only have destinations if the original message is from an "in" (sending) channel
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if !strings.Contains(channel.Direction, "in") {
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return channels
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}
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continue
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}
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}
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for _, channel := range gw.Channels {
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if _, ok := gw.Channels[getChannelID(msg)]; !ok {
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continue
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}
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// do samechannelgateway logic
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if channel.SameChannel[msg.Gateway] {
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if msg.Channel == channel.Name && msg.Account != dest.Account {
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channels = append(channels, *channel)
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}
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continue
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}
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if strings.Contains(channel.Direction, "out") && channel.Account == dest.Account && gw.validGatewayDest(msg) {
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channels = append(channels, *channel)
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}
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}
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return channels
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}
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func (gw *Gateway) getDestMsgID(msgID string, dest *bridge.Bridge, channel *config.ChannelInfo) string {
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if res, ok := gw.Messages.Get(msgID); ok {
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IDs := res.([]*BrMsgID)
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for _, id := range IDs {
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// check protocol, bridge name and channelname
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// for people that reuse the same bridge multiple times. see #342
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if dest.Protocol == id.br.Protocol && dest.Name == id.br.Name && channel.ID == id.ChannelID {
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return strings.Replace(id.ID, dest.Protocol+" ", "", 1)
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}
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}
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}
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return ""
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}
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// ignoreTextEmpty returns true if we need to ignore a message with an empty text.
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func (gw *Gateway) ignoreTextEmpty(msg *config.Message) bool {
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if msg.Text != "" {
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return false
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}
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if msg.Event == config.EventUserTyping {
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return false
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}
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// we have an attachment or actual bytes, do not ignore
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if msg.Extra != nil &&
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(msg.Extra["attachments"] != nil ||
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len(msg.Extra["file"]) > 0 ||
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len(msg.Extra[config.EventFileFailureSize]) > 0) {
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return false
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}
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gw.logger.Debugf("ignoring empty message %#v from %s", msg, msg.Account)
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return true
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}
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func (gw *Gateway) ignoreMessage(msg *config.Message) bool {
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// if we don't have the bridge, ignore it
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if _, ok := gw.Bridges[msg.Account]; !ok {
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return true
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}
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igNicks := strings.Fields(gw.Bridges[msg.Account].GetString("IgnoreNicks"))
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igMessages := strings.Fields(gw.Bridges[msg.Account].GetString("IgnoreMessages"))
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if gw.ignoreTextEmpty(msg) || gw.ignoreText(msg.Username, igNicks) || gw.ignoreText(msg.Text, igMessages) {
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return true
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}
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return false
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}
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func (gw *Gateway) modifyUsername(msg *config.Message, dest *bridge.Bridge) string {
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br := gw.Bridges[msg.Account]
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msg.Protocol = br.Protocol
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if dest.GetBool("StripNick") {
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re := regexp.MustCompile("[^a-zA-Z0-9]+")
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msg.Username = re.ReplaceAllString(msg.Username, "")
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}
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nick := dest.GetString("RemoteNickFormat")
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// loop to replace nicks
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for _, outer := range br.GetStringSlice2D("ReplaceNicks") {
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search := outer[0]
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replace := outer[1]
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// TODO move compile to bridge init somewhere
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re, err := regexp.Compile(search)
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if err != nil {
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gw.logger.Errorf("regexp in %s failed: %s", msg.Account, err)
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break
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}
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msg.Username = re.ReplaceAllString(msg.Username, replace)
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}
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if len(msg.Username) > 0 {
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// fix utf-8 issue #193
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i := 0
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for index := range msg.Username {
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if i == 1 {
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i = index
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break
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}
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i++
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}
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nick = strings.Replace(nick, "{NOPINGNICK}", msg.Username[:i]+""+msg.Username[i:], -1)
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}
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nick = strings.Replace(nick, "{BRIDGE}", br.Name, -1)
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nick = strings.Replace(nick, "{PROTOCOL}", br.Protocol, -1)
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nick = strings.Replace(nick, "{GATEWAY}", gw.Name, -1)
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nick = strings.Replace(nick, "{LABEL}", br.GetString("Label"), -1)
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nick = strings.Replace(nick, "{NICK}", msg.Username, -1)
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nick = strings.Replace(nick, "{CHANNEL}", msg.Channel, -1)
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return nick
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}
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func (gw *Gateway) modifyAvatar(msg *config.Message, dest *bridge.Bridge) string {
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iconurl := dest.GetString("IconURL")
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iconurl = strings.Replace(iconurl, "{NICK}", msg.Username, -1)
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if msg.Avatar == "" {
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msg.Avatar = iconurl
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}
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return msg.Avatar
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}
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func (gw *Gateway) modifyMessage(msg *config.Message) {
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if err := modifyMessageTengo(gw.BridgeValues().General.TengoModifyMessage, msg); err != nil {
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gw.logger.Errorf("TengoModifyMessage failed: %s", err)
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}
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// replace :emoji: to unicode
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msg.Text = emojilib.Replace(msg.Text)
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br := gw.Bridges[msg.Account]
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// loop to replace messages
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for _, outer := range br.GetStringSlice2D("ReplaceMessages") {
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search := outer[0]
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replace := outer[1]
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// TODO move compile to bridge init somewhere
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re, err := regexp.Compile(search)
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if err != nil {
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gw.logger.Errorf("regexp in %s failed: %s", msg.Account, err)
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break
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}
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msg.Text = re.ReplaceAllString(msg.Text, replace)
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}
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gw.handleExtractNicks(msg)
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// messages from api have Gateway specified, don't overwrite
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if msg.Protocol != apiProtocol {
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msg.Gateway = gw.Name
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}
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}
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// SendMessage sends a message (with specified parentID) to the channel on the selected
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// destination bridge and returns a message ID or an error.
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func (gw *Gateway) SendMessage(
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rmsg *config.Message,
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dest *bridge.Bridge,
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channel *config.ChannelInfo,
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canonicalParentMsgID string,
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) (string, error) {
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msg := *rmsg
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// Only send the avatar download event to ourselves.
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if msg.Event == config.EventAvatarDownload {
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if channel.ID != getChannelID(rmsg) {
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return "", nil
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}
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} else {
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// do not send to ourself for any other event
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if channel.ID == getChannelID(rmsg) {
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return "", nil
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}
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}
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// Too noisy to log like other events
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if msg.Event != config.EventUserTyping {
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gw.logger.Debugf("=> Sending %#v from %s (%s) to %s (%s)", msg, msg.Account, rmsg.Channel, dest.Account, channel.Name)
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}
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msg.Channel = channel.Name
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msg.Avatar = gw.modifyAvatar(rmsg, dest)
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msg.Username = gw.modifyUsername(rmsg, dest)
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msg.ID = gw.getDestMsgID(rmsg.Protocol+" "+rmsg.ID, dest, channel)
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// for api we need originchannel as channel
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if dest.Protocol == apiProtocol {
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msg.Channel = rmsg.Channel
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}
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msg.ParentID = gw.getDestMsgID(rmsg.Protocol+" "+canonicalParentMsgID, dest, channel)
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if msg.ParentID == "" {
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msg.ParentID = canonicalParentMsgID
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}
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// if the parentID is still empty and we have a parentID set in the original message
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// this means that we didn't find it in the cache so set it "msg-parent-not-found"
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if msg.ParentID == "" && rmsg.ParentID != "" {
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msg.ParentID = "msg-parent-not-found"
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}
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// if we are using mattermost plugin account, send messages to MattermostPlugin channel
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// that can be picked up by the mattermost matterbridge plugin
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if dest.Account == "mattermost.plugin" {
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gw.Router.MattermostPlugin <- msg
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}
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mID, err := dest.Send(msg)
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if err != nil {
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return mID, err
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}
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// append the message ID (mID) from this bridge (dest) to our brMsgIDs slice
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if mID != "" {
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gw.logger.Debugf("mID %s: %s", dest.Account, mID)
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return mID, nil
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//brMsgIDs = append(brMsgIDs, &BrMsgID{dest, dest.Protocol + " " + mID, channel.ID})
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}
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return "", nil
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}
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func (gw *Gateway) validGatewayDest(msg *config.Message) bool {
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return msg.Gateway == gw.Name
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}
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func getChannelID(msg *config.Message) string {
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return msg.Channel + msg.Account
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}
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func isAPI(account string) bool {
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return strings.HasPrefix(account, "api.")
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}
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// ignoreText returns true if text matches any of the input regexes.
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func (gw *Gateway) ignoreText(text string, input []string) bool {
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for _, entry := range input {
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if entry == "" {
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continue
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}
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// TODO do not compile regexps everytime
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re, err := regexp.Compile(entry)
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if err != nil {
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gw.logger.Errorf("incorrect regexp %s", entry)
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continue
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}
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if re.MatchString(text) {
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gw.logger.Debugf("matching %s. ignoring %s", entry, text)
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return true
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}
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}
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return false
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}
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func getProtocol(msg *config.Message) string {
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p := strings.Split(msg.Account, ".")
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return p[0]
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}
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func modifyMessageTengo(filename string, msg *config.Message) error {
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if filename == "" {
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return nil
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}
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res, err := ioutil.ReadFile(filename)
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if err != nil {
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return err
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}
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s := script.New(res)
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s.SetImports(stdlib.GetModuleMap(stdlib.AllModuleNames()...))
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_ = s.Add("msgText", msg.Text)
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_ = s.Add("msgUsername", msg.Username)
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_ = s.Add("msgAccount", msg.Account)
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_ = s.Add("msgChannel", msg.Channel)
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c, err := s.Compile()
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if err != nil {
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return err
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}
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if err := c.Run(); err != nil {
|
||
return err
|
||
}
|
||
msg.Text = c.Get("msgText").String()
|
||
msg.Username = c.Get("msgUsername").String()
|
||
return nil
|
||
}
|