mirror of
https://github.com/cwinfo/matterbridge.git
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345 lines
9.2 KiB
Go
345 lines
9.2 KiB
Go
package gateway
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import (
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"fmt"
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"github.com/42wim/matterbridge/bridge"
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"github.com/42wim/matterbridge/bridge/config"
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log "github.com/Sirupsen/logrus"
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"github.com/peterhellberg/emojilib"
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// "github.com/davecgh/go-spew/spew"
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"regexp"
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"strings"
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"time"
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)
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type Gateway struct {
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*config.Config
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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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Names map[string]bool
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Name string
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Message chan config.Message
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DestChannelFunc func(msg *config.Message, dest bridge.Bridge) []config.ChannelInfo
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}
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func New(cfg *config.Config) *Gateway {
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gw := &Gateway{}
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gw.Config = cfg
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gw.Channels = make(map[string]*config.ChannelInfo)
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gw.Message = make(chan config.Message)
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gw.Bridges = make(map[string]*bridge.Bridge)
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gw.Names = make(map[string]bool)
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gw.DestChannelFunc = gw.getDestChannel
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return gw
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}
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func (gw *Gateway) AddBridge(cfg *config.Bridge) error {
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for _, br := range gw.Bridges {
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if br.Account == cfg.Account {
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gw.mapChannelsToBridge(br)
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err := br.JoinChannels()
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if err != nil {
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return fmt.Errorf("Bridge %s failed to join channel: %v", br.Account, err)
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}
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return nil
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}
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}
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log.Infof("Starting bridge: %s ", cfg.Account)
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br := bridge.New(gw.Config, cfg, gw.Message)
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gw.mapChannelsToBridge(br)
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gw.Bridges[cfg.Account] = br
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err := br.Connect()
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if err != nil {
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return fmt.Errorf("Bridge %s failed to start: %v", br.Account, err)
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}
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err = br.JoinChannels()
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if err != nil {
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return fmt.Errorf("Bridge %s failed to join channel: %v", br.Account, err)
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}
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return nil
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}
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func (gw *Gateway) AddConfig(cfg *config.Gateway) error {
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if gw.Names[cfg.Name] {
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return fmt.Errorf("Gateway with name %s already exists", cfg.Name)
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}
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if cfg.Name == "" {
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return fmt.Errorf("%s", "Gateway without name found")
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}
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log.Infof("Starting gateway: %s", cfg.Name)
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gw.Names[cfg.Name] = true
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gw.Name = cfg.Name
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gw.MyConfig = cfg
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gw.mapChannels()
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for _, br := range append(gw.MyConfig.In, append(gw.MyConfig.InOut, gw.MyConfig.Out...)...) {
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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) Start() error {
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go gw.handleReceive()
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return nil
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}
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func (gw *Gateway) handleReceive() {
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for msg := range gw.Message {
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if msg.Event == config.EVENT_FAILURE {
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for _, br := range gw.Bridges {
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if msg.Account == br.Account {
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go gw.reconnectBridge(br)
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}
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}
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}
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if msg.Event == config.EVENT_REJOIN_CHANNELS {
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for _, br := range gw.Bridges {
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if msg.Account == br.Account {
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br.Joined = make(map[string]bool)
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br.JoinChannels()
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}
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}
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continue
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}
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if !gw.ignoreMessage(&msg) {
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msg.Timestamp = time.Now()
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gw.modifyMessage(&msg)
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for _, br := range gw.Bridges {
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gw.handleMessage(msg, br)
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}
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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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br.Disconnect()
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time.Sleep(time.Second * 5)
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RECONNECT:
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log.Infof("Reconnecting %s", br.Account)
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err := br.Connect()
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if err != nil {
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log.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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br.JoinChannels()
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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 = "api"
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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{Name: br.Channel, Direction: direction, ID: ID, Options: br.Options, Account: br.Account,
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GID: make(map[string]bool), SameChannel: make(map[string]bool)}
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channel.GID[gw.Name] = true
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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].GID[gw.Name] = true
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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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// 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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// add gateway to message
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gw.validGatewayDest(msg, channel)
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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, channel) {
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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) handleMessage(msg config.Message, dest *bridge.Bridge) {
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// only relay join/part when configged
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if msg.Event == config.EVENT_JOIN_LEAVE && !gw.Bridges[dest.Account].Config.ShowJoinPart {
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return
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}
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// broadcast to every out channel (irc QUIT)
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if msg.Channel == "" && msg.Event != config.EVENT_JOIN_LEAVE {
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log.Debug("empty channel")
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return
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}
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originchannel := msg.Channel
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origmsg := msg
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for _, channel := range gw.DestChannelFunc(&msg, *dest) {
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// do not send to ourself
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if channel.ID == getChannelID(origmsg) {
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continue
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}
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log.Debugf("Sending %#v from %s (%s) to %s (%s)", msg, msg.Account, originchannel, dest.Account, channel.Name)
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msg.Channel = channel.Name
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msg.Avatar = gw.modifyAvatar(origmsg, dest)
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msg.Username = gw.modifyUsername(origmsg, dest)
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// for api we need originchannel as channel
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if dest.Protocol == "api" {
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msg.Channel = originchannel
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}
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err := dest.Send(msg)
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if err != nil {
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fmt.Println(err)
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}
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}
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}
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func (gw *Gateway) ignoreMessage(msg *config.Message) bool {
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if msg.Text == "" {
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log.Debugf("ignoring empty message %#v from %s", msg, msg.Account)
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return true
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}
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for _, entry := range strings.Fields(gw.Bridges[msg.Account].Config.IgnoreNicks) {
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if msg.Username == entry {
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log.Debugf("ignoring %s from %s", msg.Username, msg.Account)
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return true
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}
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}
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// TODO do not compile regexps everytime
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for _, entry := range strings.Fields(gw.Bridges[msg.Account].Config.IgnoreMessages) {
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if entry != "" {
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re, err := regexp.Compile(entry)
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if err != nil {
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log.Errorf("incorrect regexp %s for %s", entry, msg.Account)
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continue
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}
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if re.MatchString(msg.Text) {
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log.Debugf("matching %s. ignoring %s from %s", entry, msg.Text, msg.Account)
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return true
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}
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}
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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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nick := gw.Config.General.RemoteNickFormat
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if nick == "" {
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nick = dest.Config.RemoteNickFormat
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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, "{NICK}", msg.Username, -1)
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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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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 := gw.Config.General.IconURL
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if iconurl == "" {
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iconurl = dest.Config.IconURL
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}
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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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// replace :emoji: to unicode
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msg.Text = emojilib.Replace(msg.Text)
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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 (gw *Gateway) validGatewayDest(msg *config.Message, channel *config.ChannelInfo) bool {
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GIDmap := gw.Channels[getChannelID(*msg)].GID
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// gateway is specified in message (probably from api)
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if msg.Gateway != "" {
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return channel.GID[msg.Gateway]
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}
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// check if we are running a samechannelgateway.
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// if it is and the channel name matches it's ok, otherwise we shouldn't use this channel.
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for k := range GIDmap {
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if channel.SameChannel[k] {
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if msg.Channel == channel.Name {
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// add the gateway to our message
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msg.Gateway = k
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return true
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} else {
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return false
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}
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}
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}
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// check if we are in the correct gateway
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for k := range GIDmap {
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if channel.GID[k] {
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// add the gateway to our message
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msg.Gateway = k
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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 isApi(account string) bool {
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return strings.HasPrefix(account, "api.")
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}
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