cmd/mmc/main.go

   1 // mmc -- Mattermost client
   2 // Copyright (C) 2023 Sergey Matveev <stargrave@stargrave.org>
   3 //
   4 // This program is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU Affero General Public License as
   6 // published by the Free Software Foundation, either version 3 of the
   7 // License.
   8 //
   9 // This program is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU Affero General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU Affero General Public License
  15 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 package main
  18
  19 import (
  20         "archive/tar"
  21         "bytes"
  22         "encoding/json"
  23         "errors"
  24         "flag"
  25         "fmt"
  26         "io"
  27         "io/fs"
  28         "log"
  29         "os"
  30         "os/exec"
  31         "os/signal"
  32         "path"
  33         "strings"
  34         "syscall"
  35         "time"
  36
  37         "github.com/davecgh/go-spew/spew"
  38         "github.com/mattermost/mattermost-server/v6/model"
  39         "go.stargrave.org/mmc"
  40 )
  41
  42 const CmdFile = "/FILE "
  43
  44 var (
  45         Newwin    = flag.String("newwin", "cmd/newwin", "Path to newwin command")
  46         DebugFifo = flag.String("debug", "debug", "Path to debug FIFO to be created")
  47         DebugFd   *os.File
  48         UmaskCur  int
  49 )
  50
  51 func rewriteIfChanged(fn string, data string) {
  52         if their, err := os.ReadFile(fn); err != nil ||
  53                 bytes.Compare([]byte(data), their) != 0 {
  54                 if err = os.WriteFile(fn, []byte(data), 0o666); err != nil {
  55                         log.Fatalln(err)
  56                 }
  57         }
  58 }
  59
  60 func main() {
  61         entrypoint := flag.String("entrypoint", "mm.rnd.stcnet.ru", "Entrypoint")
  62         notifyCmd := flag.String("notify", "cmd/notify", "Path to notification handler")
  63         heartbeatCh := flag.String("heartbeat-ch", "town-square", "Channel for heartbeating")
  64         flag.Parse()
  65         log.SetFlags(log.Lshortfile)
  66         log.SetOutput(os.Stdout)
  67         UmaskCur = syscall.Umask(0)
  68         syscall.Umask(UmaskCur)
  69
  70         var err error
  71         if *DebugFifo != "" {
  72                 DebugFd, err = os.OpenFile(
  73                         *DebugFifo, os.O_WRONLY|os.O_APPEND, os.FileMode(0666),
  74                 )
  75                 if err != nil {
  76                         log.Fatalln(err)
  77                 }
  78                 defer DebugFd.Close()
  79         }
  80
  81         login, password := mmc.FindInNetrc(*entrypoint)
  82         if login == "" || password == "" {
  83                 log.Fatalln("no credentials found for:", *entrypoint)
  84         }
  85         c := model.NewAPIv4Client("https://" + *entrypoint)
  86         c.Login(login, password)
  87         me, resp, err := c.GetMe("")
  88         if err != nil {
  89                 if DebugFd != nil {
  90                         spew.Fdump(DebugFd, resp)
  91                 }
  92                 log.Fatalln(err)
  93         }
  94         if DebugFd != nil {
  95                 spew.Fdump(DebugFd, me)
  96         }
  97         log.Println("logged in")
  98
  99         time.Sleep(mmc.SleepTime)
 100         teams, resp, err := c.GetTeamsForUser(me.Id, "")
 101         if err != nil {
 102                 if DebugFd != nil {
 103                         spew.Fdump(DebugFd, resp)
 104                 }
 105                 log.Fatalln(err)
 106         }
 107         if DebugFd != nil {
 108                 spew.Fdump(DebugFd, teams)
 109         }
 110         Team := teams[0]
 111
 112         var updateQueue []string
 113         LastSent := time.Now()
 114
 115         Users, err := mmc.GetUsers(c, DebugFd)
 116         if err != nil {
 117                 log.Fatalln(err)
 118         }
 119         for _, u := range Users {
 120                 pth := path.Join("users", strings.ReplaceAll(u.Username, ".", "_"))
 121                 os.MkdirAll(pth, 0777)
 122                 rewriteIfChanged(
 123                         path.Join(pth, "name"),
 124                         fmt.Sprintf("%s %s\n", u.FirstName, u.LastName),
 125                 )
 126                 rewriteIfChanged(path.Join(pth, "email"), u.Email+"\n")
 127                 rewriteIfChanged(path.Join(pth, "id"), u.Id+"\n")
 128                 if _, err := os.Stat(path.Join(pth, mmc.OutRec)); err != nil &&
 129                         errors.Is(err, fs.ErrNotExist) {
 130                         if _, err = os.OpenFile(
 131                                 path.Join(pth, mmc.OutRec), os.O_WRONLY|os.O_CREATE, 0o666,
 132                         ); err != nil {
 133                                 log.Fatalln(err)
 134                         }
 135                 }
 136                 updateQueue = append(updateQueue,
 137                         pth, u.Id+"__"+me.Id,
 138                         pth, me.Id+"__"+u.Id,
 139                 )
 140
 141                 statusPth := path.Join(pth, "status")
 142                 os.Remove(statusPth)
 143                 if err := syscall.Mkfifo(statusPth, 0666); err != nil {
 144                         log.Fatalln(err)
 145                 }
 146                 go func(u *model.User) {
 147                         for {
 148                                 time.Sleep(mmc.SleepTime)
 149                                 fd, err := os.OpenFile(
 150                                         statusPth, os.O_WRONLY|os.O_APPEND, os.FileMode(0666),
 151                                 )
 152                                 if err != nil {
 153                                         log.Println("OpenFile:", statusPth, err)
 154                                         continue
 155                                 }
 156                                 status, resp, err := c.GetUserStatus(u.Id, "")
 157                                 if err != nil {
 158                                         if DebugFd != nil {
 159                                                 spew.Fdump(DebugFd, resp)
 160                                         }
 161                                         log.Println("GetUserStatus:", err)
 162                                         fd.Close()
 163                                         continue
 164                                 }
 165                                 if DebugFd != nil {
 166                                         spew.Fdump(DebugFd, status)
 167                                 }
 168                                 fmt.Fprintf(fd, "%s\n", status.Status)
 169                                 fd.Close()
 170                         }
 171                 }(u)
 172
 173                 pth = path.Join(pth, "in")
 174                 os.Remove(pth)
 175                 if err := syscall.Mkfifo(pth, 0666); err != nil {
 176                         log.Fatalln(err)
 177                 }
 178                 go func(u *model.User) {
 179                         var dc *model.Channel
 180                         for {
 181                                 fd, err := os.OpenFile(pth, os.O_RDONLY, os.FileMode(0666))
 182                                 if err != nil {
 183                                         continue
 184                                 }
 185                                 data, err := io.ReadAll(fd)
 186                                 fd.Close()
 187                                 if err != nil {
 188                                         continue
 189                                 }
 190                                 if dc == nil {
 191                                         dc, resp, err = c.CreateDirectChannel(me.Id, u.Id)
 192                                         if err != nil {
 193                                                 if DebugFd != nil {
 194                                                         spew.Fdump(DebugFd, resp)
 195                                                 }
 196                                                 log.Println("CreateDirectChannel:", err)
 197                                                 continue
 198                                         }
 199                                         if DebugFd != nil {
 200                                                 spew.Fdump(DebugFd, dc)
 201                                         }
 202                                 }
 203                                 if _, err = makePost(c, dc.Id, string(data)); err != nil {
 204                                         log.Println("makePost:", err)
 205                                 }
 206                                 LastSent = time.Now()
 207                         }
 208                 }(u)
 209         }
 210
 211         Chans := make(map[string]*model.Channel)
 212         time.Sleep(mmc.SleepTime)
 213         page, resp, err := c.GetChannelsForTeamForUser(Team.Id, me.Id, false, "")
 214         if err != nil {
 215                 if DebugFd != nil {
 216                         spew.Fdump(DebugFd, resp)
 217                 }
 218                 log.Fatalln(err)
 219         }
 220         if DebugFd != nil {
 221                 spew.Fdump(DebugFd, page)
 222         }
 223         for _, ch := range page {
 224                 if ch.Type == "D" {
 225                         continue
 226                 }
 227                 Chans[ch.Name] = ch
 228                 pth := path.Join("chans", strings.ReplaceAll(ch.Name, ".", "_"))
 229                 updateQueue = append(updateQueue, pth, ch.Id)
 230                 os.MkdirAll(pth, 0777)
 231                 rewriteIfChanged(path.Join(pth, "id"), ch.Id+"\n")
 232                 rewriteIfChanged(path.Join(pth, "info"), fmt.Sprintf(
 233                         "%s\n%s\n%s\n",
 234                         ch.DisplayName,
 235                         ch.Header,
 236                         ch.Purpose,
 237                 ))
 238                 if _, err := os.Stat(path.Join(pth, mmc.OutRec)); err != nil &&
 239                         errors.Is(err, fs.ErrNotExist) {
 240                         if _, err = os.OpenFile(
 241                                 path.Join(pth, mmc.OutRec), os.O_WRONLY|os.O_CREATE, 0o666,
 242                         ); err != nil {
 243                                 log.Fatalln(err)
 244                         }
 245                 }
 246
 247                 usersPth := path.Join(pth, "users")
 248                 os.Remove(usersPth)
 249                 if err := syscall.Mkfifo(usersPth, 0666); err != nil {
 250                         log.Fatalln(err)
 251                 }
 252                 go func(ch *model.Channel) {
 253                         for {
 254                                 time.Sleep(mmc.SleepTime)
 255                                 fd, err := os.OpenFile(
 256                                         usersPth, os.O_WRONLY|os.O_APPEND, os.FileMode(0666),
 257                                 )
 258                                 if err != nil {
 259                                         log.Println("OpenFile:", usersPth, err)
 260                                         continue
 261                                 }
 262                                 for n := 0; ; n++ {
 263                                         users, resp, err := c.GetUsersInChannel(ch.Id, n, mmc.PerPage, "")
 264                                         if err != nil {
 265                                                 if DebugFd != nil {
 266                                                         spew.Fdump(DebugFd, resp)
 267                                                 }
 268                                                 log.Println("GetUsersInChannel:", err)
 269                                                 fd.Close()
 270                                                 continue
 271                                         }
 272                                         if DebugFd != nil {
 273                                                 spew.Fdump(DebugFd, users)
 274                                         }
 275                                         for _, u := range users {
 276                                                 fmt.Fprintf(fd, "%s\n", u.Username)
 277                                         }
 278                                         if len(users) < mmc.PerPage {
 279                                                 break
 280                                         }
 281                                 }
 282                                 fd.Close()
 283                         }
 284                 }(ch)
 285
 286                 pth = path.Join(pth, "in")
 287                 os.Remove(pth)
 288                 if err := syscall.Mkfifo(pth, 0666); err != nil {
 289                         log.Fatalln(err)
 290                 }
 291                 go func(ch *model.Channel) {
 292                         for {
 293                                 fd, err := os.OpenFile(pth, os.O_RDONLY, os.FileMode(0666))
 294                                 if err != nil {
 295                                         continue
 296                                 }
 297                                 data, err := io.ReadAll(fd)
 298                                 fd.Close()
 299                                 if err != nil {
 300                                         continue
 301                                 }
 302                                 if _, err = makePost(c, ch.Id, string(data)); err != nil {
 303                                         log.Println("makePost:", err)
 304                                 }
 305                                 LastSent = time.Now()
 306                         }
 307                 }(ch)
 308         }
 309
 310         go func() {
 311                 log.Println("syncing", len(Chans)+len(Users), "rooms")
 312                 for len(updateQueue) > 0 {
 313                         err := updatePosts(c, Users, updateQueue[0], updateQueue[1])
 314                         if err != nil {
 315                                 log.Println("updatePosts:", err)
 316                         }
 317                         updateQueue = updateQueue[2:]
 318                 }
 319                 log.Println("sync done")
 320         }()
 321
 322         go func() {
 323                 os.MkdirAll("file", 0777)
 324                 pthGet := path.Join("file", "get")
 325                 os.Remove(pthGet)
 326                 if err := syscall.Mkfifo(pthGet, 0666); err != nil {
 327                         log.Fatalln(err)
 328                 }
 329                 pthOut := path.Join("file", "out")
 330                 os.Remove(pthOut)
 331                 if err := syscall.Mkfifo(pthOut, 0666); err != nil {
 332                         log.Fatalln(err)
 333                 }
 334                 for {
 335                         time.Sleep(mmc.SleepTime)
 336                         fd, err := os.OpenFile(pthGet, os.O_RDONLY, os.FileMode(0666))
 337                         if err != nil {
 338                                 continue
 339                         }
 340                         data, err := io.ReadAll(fd)
 341                         fd.Close()
 342                         if err != nil {
 343                                 continue
 344                         }
 345                         fileId := strings.TrimRight(string(data), " \n")
 346                         if len(fileId) == 0 {
 347                                 continue
 348                         }
 349                         fi, resp, err := c.GetFileInfo(fileId)
 350                         if DebugFd != nil {
 351                                 spew.Fdump(DebugFd, fi, resp)
 352                         }
 353                         if err != nil {
 354                                 log.Println(err)
 355                                 continue
 356                         }
 357                         if fi == nil {
 358                                 fmt.Println(resp)
 359                                 continue
 360                         }
 361                         data, resp, err = c.GetFile(fileId)
 362                         if err != nil {
 363                                 if DebugFd != nil {
 364                                         spew.Fdump(DebugFd, resp)
 365                                 }
 366                                 log.Println(err)
 367                                 continue
 368                         }
 369                         fd, err = os.OpenFile(
 370                                 pthOut, os.O_WRONLY|os.O_APPEND, os.FileMode(0666),
 371                         )
 372                         if err != nil {
 373                                 log.Println(err)
 374                                 continue
 375                         }
 376                         w := tar.NewWriter(fd)
 377                         if err = w.WriteHeader(&tar.Header{
 378                                 Format:   tar.FormatPAX,
 379                                 Typeflag: tar.TypeReg,
 380                                 Name:     fi.Name,
 381                                 Size:     int64(len(data)),
 382                                 Mode:     0o666,
 383                                 ModTime:  time.Unix(fi.CreateAt/1000, 0),
 384                                 PAXRecords: map[string]string{
 385                                         "MM.FileId":   fi.Id,
 386                                         "MM.MIMEType": fi.MimeType,
 387                                 },
 388                         }); err != nil {
 389                                 log.Println(err)
 390                                 fd.Close()
 391                                 continue
 392                         }
 393                         if _, err = io.Copy(w, bytes.NewReader(data)); err != nil {
 394                                 log.Println(err)
 395                                 fd.Close()
 396                                 continue
 397                         }
 398                         err = w.Close()
 399                         fd.Close()
 400                         if err != nil {
 401                                 log.Println(err)
 402                         }
 403                 }
 404         }()
 405
 406         needsShutdown := make(chan os.Signal)
 407         wc, err := model.NewWebSocketClient4("wss://"+*entrypoint, c.AuthToken)
 408         if err != nil {
 409                 log.Fatalln(err)
 410         }
 411         go func() {
 412                 wc.Listen()
 413                 t := time.NewTicker(time.Minute)
 414                 for {
 415                         select {
 416                         case <-t.C:
 417                                 if time.Now().Before(LastSent.Add(time.Minute)) {
 418                                         continue
 419                                 }
 420                                 wc.SendMessage("ping", nil)
 421                                 if *heartbeatCh != "" {
 422                                         if _, _, err = c.ViewChannel(
 423                                                 me.Id,
 424                                                 &model.ChannelView{ChannelId: Chans[*heartbeatCh].Id},
 425                                         ); err != nil {
 426                                                 log.Println("ChannelView:", err)
 427                                         }
 428                                 }
 429                         case <-wc.PingTimeoutChannel:
 430                                 log.Println("PING timeout")
 431                                 needsShutdown <- syscall.SIGTERM
 432                         case e := <-wc.EventChannel:
 433                                 if e == nil || !e.IsValid() {
 434                                         continue
 435                                 }
 436                                 data := e.GetData()
 437                                 if DebugFd != nil {
 438                                         spew.Fdump(DebugFd, e.EventType(), data)
 439                                 }
 440                                 var user *model.User
 441                                 if userId, ok := data["user_id"]; ok && userId.(string) != "" {
 442                                         user = Users[userId.(string)]
 443                                         if user == nil {
 444                                                 log.Println("unknown user for event:", e)
 445                                                 continue
 446                                         }
 447                                 }
 448                                 switch eventType := e.EventType(); eventType {
 449                                 case model.WebsocketEventTyping:
 450                                         if *notifyCmd != "" {
 451                                                 exec.Command(*notifyCmd, "typing: "+user.Username).Run()
 452                                         }
 453                                 case model.WebsocketEventPostEdited,
 454                                         model.WebsocketEventPostDeleted,
 455                                         model.WebsocketEventPosted:
 456                                         chName := data["channel_name"].(string)
 457                                         var post model.Post
 458                                         if err = json.NewDecoder(
 459                                                 strings.NewReader(data["post"].(string)),
 460                                         ).Decode(&post); err != nil {
 461                                                 log.Fatalln(err)
 462                                         }
 463                                         var recipient string
 464                                         switch model.ChannelType(data["channel_type"].(string)) {
 465                                         case model.ChannelTypeDirect:
 466                                                 userId := strings.TrimPrefix(chName, me.Id+"__")
 467                                                 userId = strings.TrimSuffix(userId, "__"+me.Id)
 468                                                 user := Users[userId]
 469                                                 if user == nil {
 470                                                         log.Println("unknown user:", post)
 471                                                         continue
 472                                                 }
 473                                                 recipient = path.Join("users", user.Username)
 474                                         case model.ChannelTypeOpen:
 475                                                 fallthrough
 476                                         case model.ChannelTypePrivate:
 477                                                 fallthrough
 478                                         case model.ChannelTypeGroup:
 479                                                 recipient = path.Join("chans", chName)
 480                                         }
 481                                         if err = writePosts(
 482                                                 recipient, Users, []mmc.Post{{P: &post, E: eventType}},
 483                                         ); err != nil {
 484                                                 log.Fatalln(err)
 485                                         }
 486                                 case model.WebsocketEventStatusChange:
 487                                         log.Println("status change:", user.Username, "->", data["status"].(string))
 488                                         if *notifyCmd != "" {
 489                                                 exec.Command(*notifyCmd, fmt.Sprintf(
 490                                                         "status: %s -> %s",
 491                                                         user.Username, data["status"].(string),
 492                                                 )).Run()
 493                                         }
 494                                 case model.WebsocketEventHello:
 495                                 case model.WebsocketEventChannelViewed:
 496                                 default:
 497                                         log.Println(e)
 498                                 }
 499                         case resp := <-wc.ResponseChannel:
 500                                 if resp == nil || !resp.IsValid() {
 501                                         continue
 502                                 }
 503                                 if DebugFd != nil {
 504                                         spew.Fdump(DebugFd, resp)
 505                                 }
 506                                 if text, ok := resp.Data["text"].(string); ok && text == "pong" {
 507                                         LastSent = time.Now()
 508                                 }
 509                         }
 510                 }
 511         }()
 512
 513         signal.Notify(needsShutdown, syscall.SIGTERM, syscall.SIGINT)
 514         <-needsShutdown
 515         c.Logout()
 516         log.Println("finished")
 517 }