package main import ( "encoding/json" "fmt" "strings" "github.com/gomarkdown/markdown" "github.com/matrix-org/gomatrix" ) type MatrixDaemon struct { Stopped bool ShutdownChannel chan string bot *gomatrix.Client userID string tokens map[string]UnverifiedUser // Map of tokens to users languages map[string]string // Map of roomIDs to language codes app *appContext } type UnverifiedUser struct { Verified bool User *MatrixUser } type MatrixUser struct { RoomID string UserID string Lang string Contact bool } var matrixFilter = gomatrix.Filter{ Room: gomatrix.RoomFilter{ Timeline: gomatrix.FilterPart{ Types: []string{ "m.room.message", "m.room.member", }, }, }, EventFields: []string{ "type", "event_id", "room_id", "state_key", "sender", "content.body", "content.membership", }, } func newMatrixDaemon(app *appContext) (d *MatrixDaemon, err error) { matrix := app.config.Section("matrix") homeserver := matrix.Key("homeserver").String() token := matrix.Key("token").String() d = &MatrixDaemon{ ShutdownChannel: make(chan string), userID: matrix.Key("user_id").String(), tokens: map[string]UnverifiedUser{}, languages: map[string]string{}, app: app, } d.bot, err = gomatrix.NewClient(homeserver, d.userID, token) if err != nil { return } filter, err := json.Marshal(matrixFilter) if err != nil { return } resp, err := d.bot.CreateFilter(filter) d.bot.Store.SaveFilterID(d.userID, resp.FilterID) for _, user := range app.storage.matrix { if user.Lang != "" { d.languages[user.RoomID] = user.Lang } } return } func (d *MatrixDaemon) run() { d.app.info.Println("Starting Matrix bot daemon") syncer := d.bot.Syncer.(*gomatrix.DefaultSyncer) syncer.OnEventType("m.room.message", d.handleMessage) // syncer.OnEventType("m.room.member", d.handleMembership) if err := d.bot.Sync(); err != nil { d.app.err.Printf("Matrix sync failed: %v", err) } } func (d *MatrixDaemon) Shutdown() { d.bot.StopSync() d.Stopped = true close(d.ShutdownChannel) } func (d *MatrixDaemon) handleMessage(event *gomatrix.Event) { if event.Sender == d.userID { return } lang := "en-us" if l, ok := d.languages[event.RoomID]; ok { if _, ok := d.app.storage.lang.Telegram[l]; ok { lang = l } } sects := strings.Split(event.Content["body"].(string), " ") switch sects[0] { case "!lang": if len(sects) == 2 { d.commandLang(event, sects[1], lang) } else { d.commandLang(event, "", lang) } } } func (d *MatrixDaemon) commandLang(event *gomatrix.Event, code, lang string) { if code == "" { list := "!lang \n" for c := range d.app.storage.lang.Telegram { list += fmt.Sprintf("%s: %s\n", c, d.app.storage.lang.Telegram[c].Meta.Name) } _, err := d.bot.SendText( event.RoomID, list, ) if err != nil { d.app.err.Printf("Matrix: Failed to send message to \"%s\": %v", event.Sender, err) } return } if _, ok := d.app.storage.lang.Telegram[code]; !ok { return } d.languages[event.RoomID] = code if u, ok := d.app.storage.matrix[event.RoomID]; ok { u.Lang = code d.app.storage.matrix[event.RoomID] = u if err := d.app.storage.storeMatrixUsers(); err != nil { d.app.err.Printf("Matrix: Failed to store Matrix users: %v", err) } } } func (d *MatrixDaemon) CreateRoom(userID string) (string, error) { room, err := d.bot.CreateRoom(&gomatrix.ReqCreateRoom{ Visibility: "private", Invite: []string{userID}, Topic: d.app.config.Section("matrix").Key("topic").String(), }) if err != nil { return "", err } return room.RoomID, nil } func (d *MatrixDaemon) SendStart(userID string) (ok bool) { roomID, err := d.CreateRoom(userID) if err != nil { d.app.err.Printf("Failed to create room for user \"%s\": %v", userID, err) return } lang := "en-us" pin := genAuthToken() d.tokens[pin] = UnverifiedUser{ false, &MatrixUser{ RoomID: roomID, UserID: userID, Lang: lang, }, } _, err = d.bot.SendText( roomID, d.app.storage.lang.Telegram[lang].Strings.get("matrixStartMessage")+"\n\n"+pin+"\n\n"+ d.app.storage.lang.Telegram[lang].Strings.template("languageMessage", tmpl{"command": "!lang"}), ) if err != nil { d.app.err.Printf("Matrix: Failed to send welcome message to \"%s\": %v", userID, err) return } ok = true return } func (d *MatrixDaemon) Send(message *Message, roomID ...string) (err error) { md := "" if message.Markdown != "" { // Convert images to links md = string(markdown.ToHTML([]byte(strings.ReplaceAll(message.Markdown, "![", "[")), nil, renderer)) } for _, id := range roomID { if md != "" { _, err = d.bot.SendFormattedText(id, message.Text, md) } else { _, err = d.bot.SendText(id, message.Text) } if err != nil { return } } return } // User enters ID on sign-up, a PIN is sent to them. They enter it on sign-up. // Message the user first, to avoid E2EE by default