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package main
import (
"fmt"
"os"
"strings"
"github.com/gofiber/fiber/v2"
"github.com/gofiber/fiber/v2/middleware/logger"
"maunium.net/go/mautrix"
"maunium.net/go/mautrix/id"
)
var (
matrixClient *mautrix.Client
defaultRoom *string
port = "3000"
)
func init() {
homeserverURL, ok := os.LookupEnv("HOMESERVER_URL")
if !ok {
panic("HOMESERVER_URL env var required")
}
userID, ok := os.LookupEnv("USER_ID")
if !ok {
panic("USER_ID env var required")
} else {
userID = strings.Replace(userID, homeserverURL, "", -1)
userID = strings.TrimPrefix(userID, "@")
}
accessToken, ok := os.LookupEnv("ACCESS_TOKEN")
if !ok {
panic("ACCESS_TOKEN env var required")
}
if p, ok := os.LookupEnv("PORT"); ok {
port = p
}
room, ok := os.LookupEnv("DEFAULT_ROOM")
if ok {
defaultRoom = &room
}
client, err := mautrix.NewClient(homeserverURL, id.NewUserID(userID, homeserverURL), accessToken)
if err != nil {
panic(err)
}
matrixClient = client
}
func main() {
app := fiber.New()
app.Use(logger.New())
app.Post("/", HandlePayloadPost)
app.Post("/alertmanager", HandleAlertmanagerPayloadPost)
app.Post("/nexmo/sms", HandleNexmoSMSPost)
app.Listen(fmt.Sprintf(":%s", port))
}
func getRoom(roomID string) string {
room := parseRoom(roomID)
if strings.HasPrefix(room, "#") || !strings.HasPrefix("!", room) {
if !strings.HasPrefix(room, "#") {
room = fmt.Sprintf("#%s", room)
}
resp, err := matrixClient.ResolveAlias(id.RoomAlias(room))
if err == nil {
room = resp.RoomID.String()
} else {
room = strings.Replace(room, "#", "!", 1)
}
}
return room
}
func parseRoom(room string) string {
prefix := ""
local := ""
domain := ""
parts := strings.Split(room, ":")
if len(parts) == 2 {
domain = parts[1]
} else {
domain = matrixClient.HomeserverURL.Host
}
if strings.HasPrefix(parts[0], "!") {
prefix = "!"
parts[0] = strings.TrimPrefix(parts[0], "!")
}
if strings.HasPrefix(parts[0], "#") {
prefix = "#"
parts[0] = strings.TrimPrefix(parts[0], "#")
}
local = parts[0]
return fmt.Sprintf("%s%s:%s", prefix, local, domain)
}
func HandlePayloadPost(c *fiber.Ctx) error {
payload := Payload{}
if err := c.BodyParser(&payload); err != nil {
return err
}
if err := payload.Validate(defaultRoom); err != nil {
fmt.Println("Invalid payload - ", err)
return c.Status(fiber.StatusBadRequest).SendString(err.Error())
}
switch payload.Type {
case PayloadTypeText:
_, err := matrixClient.SendText(id.RoomID(payload.RoomID), payload.Message)
if err != nil {
if httpErr, ok := err.(mautrix.HTTPError); ok {
return c.Status(httpErr.Response.StatusCode).SendString(httpErr.RespError.Err)
}
return fiber.ErrInternalServerError
}
case PayloadTypeNotice:
_, err := matrixClient.SendNotice(id.RoomID(payload.RoomID), payload.Message)
if err != nil {
if httpErr, ok := err.(mautrix.HTTPError); ok {
return c.Status(httpErr.Response.StatusCode).SendString(httpErr.RespError.Err)
}
return fiber.ErrInternalServerError
}
}
return c.SendStatus(fiber.StatusOK)
}