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package main
import (
"encoding/hex"
"flag"
"fmt"
"net/http"
"os"
"time"
"code.fbi.h-da.de/its/bbbatscale-support-notify/webhooks"
"go.uber.org/zap"
"maunium.net/go/mautrix"
"maunium.net/go/mautrix/id"
)
var (
matrixHomeserver = flag.String("homeserver", os.Getenv("MATRIX_HOMESERVER"),
"Matrix homeserver")
matrixUserID = flag.String("userid", os.Getenv("MATRIX_USERID"),
"Matrix user ID")
matrixToken = flag.String("token", os.Getenv("MATRIX_TOKEN"),
"Matrix access token")
matrixRoomID = flag.String("roomid", os.Getenv("MATRIX_ROOMID"),
"Matrix room ID")
listenAddress = flag.String("listen",
getEnvOrDefault("NOTIFY_LISTEN_ADDR", ":8080"), "listen for requests on this `addr`")
hookSecret = flag.String("secret",
os.Getenv("NOTIFY_HOOKSECRET"), "hex-encoded secret for authenticating webhooks")
)
func main() {
logger, err := zap.NewProduction()
if err != nil {
// Just tear it down already.
_, _ = fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
zap.RedirectStdLog(logger)
log := logger.Sugar()
flag.Parse()
m, err := mautrix.NewClient(*matrixHomeserver, id.UserID(*matrixUserID),
*matrixToken)
if err != nil {
log.Fatalw("matrix.NewClient returned with error",
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"err", err,
"homeserver", *matrixHomeserver,
"userid", *matrixUserID,
)
}
n := ¬ifier{
matrix: m,
roomID: id.RoomID(*matrixRoomID),
}
secretKey, err := hex.DecodeString(*hookSecret)
if err != nil {
log.Fatal("decode hook secret: ", err)
}
ch, handler, err := webhooks.Receive(
webhooks.Authenticate(secretKey),
webhooks.WithLogger(log.Desugar()),
)
if err != nil {
log.Fatal("webhooks.Receive: ", err)
}
go func() {
for message := range ch {
switch message.Event {
case "SUPPORT_CHAT_INCOMING_MESSAGE":
chatMsg := webhookPayloadToChatMessage(message.Payload)
if err := n.notify(chatMsg); err != nil {
log.Error("notify: ", err)
}
default:
log.Info("received message for event: ", message.Event)
}
}
}()
http.Handle("/notify", handler)
err = http.ListenAndServe(*listenAddress, nil)
if err != nil {
log.Fatalw("ListenAndServe failed",
"err", err,
"address", *listenAddress,
)
}
}
type notifier struct {
matrix *mautrix.Client
roomID id.RoomID
}
func (n *notifier) notify(m chatMessage) error {
const notificationFmt = "# Incoming support message from %s (%s):\n\n> %s\n"
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msg := fmt.Sprintf(notificationFmt, m.user, m.displayName, m.message)
_, err := n.matrix.SendNotice(n.roomID, msg)
return err
}
type chatMessage struct {
user string
displayName string
message string
timestamp time.Time
}
func webhookPayloadToChatMessage(payload map[string]interface{}) chatMessage {
var m chatMessage
m.user, _ = payload["username"].(string)
m.displayName, _ = payload["userDisplayName"].(string)
m.message, _ = payload["message"].(string)
if timestamp, ok := payload["timestamp"].(string); ok {
if t, err := time.Parse(time.RFC3339, timestamp); err == nil {
m.timestamp = t
}
}
return m
}
func getEnvOrDefault(key, def string) string {
if v := os.Getenv(key); v != "" {
return v
}
return def
}