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 (
  43         PerPage = 100
  44         CmdFile = "/FILE "
  45 )
  46
  47 var (
  48         Newwin    = flag.String("newwin", "cmd/newwin", "Path to newwin command")
  49         DebugFifo = flag.String("debug", "debug", "Path to debug FIFO to be created")
  50         DebugFd   *os.File
  51         UmaskCur  int
  52 )
  53
  54 func rewriteIfChanged(fn string, data string) {
  55         if their, err := os.ReadFile(fn); err != nil ||
  56                 bytes.Compare([]byte(data), their) != 0 {
  57                 if err = os.WriteFile(fn, []byte(data), 0o666); err != nil {
  58                         log.Fatalln(err)
  59                 }
  60         }
  61 }
  62
  63 func main() {
  64         entrypoint := flag.String("entrypoint", "mm.rnd.stcnet.ru", "Entrypoint")
  65         notifyCmd := flag.String("notify", "cmd/notify", "Path to notification handler")
  66         heartbeatCh := flag.String("heartbeat-ch", "town-square", "Channel for heartbeating")
  67         flag.Parse()
  68         log.SetFlags(log.Lshortfile)
  69         log.SetOutput(os.Stdout)
  70         UmaskCur = syscall.Umask(0)
  71         syscall.Umask(UmaskCur)
  72
  73         var err error
  74         if *DebugFifo != "" {
  75                 DebugFd, err = os.OpenFile(
  76                         *DebugFifo, os.O_WRONLY|os.O_APPEND, os.FileMode(0666),
  77                 )
  78                 if err != nil {
  79                         log.Fatalln(err)
  80                 }
  81                 defer DebugFd.Close()
  82         }
  83
  84         login, password := mmc.FindInNetrc(*entrypoint)
  85         if login == "" || password == "" {
  86                 log.Fatalln("no credentials found for:", *entrypoint)
  87         }
  88         c := model.NewAPIv4Client("https://" + *entrypoint)
  89         c.Login(login, password)
  90         me, resp, err := c.GetMe("")
  91         if err != nil {
  92                 if DebugFd != nil {
  93                         spew.Fdump(DebugFd, resp)
  94                 }
  95                 log.Fatalln(err)
  96         }
  97         if DebugFd != nil {
  98                 spew.Fdump(DebugFd, me)
  99         }
 100         log.Println("logged in")
 101
 102         time.Sleep(mmc.SleepTime)
 103         teams, resp, err := c.GetTeamsForUser(me.Id, "")
 104         if err != nil {
 105                 if DebugFd != nil {
 106                         spew.Fdump(DebugFd, resp)
 107                 }
 108                 log.Fatalln(err)
 109         }
 110         if DebugFd != nil {
 111                 spew.Fdump(DebugFd, teams)
 112         }
 113         Team := teams[0]
 114
 115         Users := make(map[string]*model.User)
 116         for pageNum := 0; ; pageNum++ {
 117                 time.Sleep(mmc.SleepTime)
 118                 page, resp, err := c.GetUsers(pageNum, PerPage, "")
 119                 if err != nil {
 120                         if DebugFd != nil {
 121                                 spew.Fdump(DebugFd, resp)
 122                         }
 123                         log.Fatalln(err)
 124                 }
 125                 if DebugFd != nil {
 126                         spew.Fdump(DebugFd, page)
 127                 }
 128                 for _, u := range page {
 129                         Users[u.Id] = u
 130                 }
 131                 if len(page) < PerPage {
 132                         break
 133                 }
 134         }
 135
 136         var updateQueue []string
 137         LastSent := time.Now()
 138         for _, u := range Users {
 139                 pth := path.Join("users", strings.ReplaceAll(u.Username, ".", "_"))
 140                 os.MkdirAll(pth, 0777)
 141                 rewriteIfChanged(
 142                         path.Join(pth, "name"),
 143                         fmt.Sprintf("%s %s\n", u.FirstName, u.LastName),
 144                 )
 145                 rewriteIfChanged(path.Join(pth, "email"), u.Email+"\n")
 146                 rewriteIfChanged(path.Join(pth, "id"), u.Id+"\n")
 147                 if _, err := os.Stat(path.Join(pth, mmc.OutRec)); err != nil &&
 148                         errors.Is(err, fs.ErrNotExist) {
 149                         if _, err = os.OpenFile(
 150                                 path.Join(pth, mmc.OutRec), os.O_WRONLY|os.O_CREATE, 0o666,
 151                         ); err != nil {
 152                                 log.Fatalln(err)
 153                         }
 154                 }
 155                 updateQueue = append(updateQueue,
 156                         pth, u.Id+"__"+me.Id,
 157                         pth, me.Id+"__"+u.Id,
 158                 )
 159
 160                 statusPth := path.Join(pth, "status")
 161                 os.Remove(statusPth)
 162                 if err := syscall.Mkfifo(statusPth, 0666); err != nil {
 163                         log.Fatalln(err)
 164                 }
 165                 go func(u *model.User) {
 166                         for {
 167                                 time.Sleep(mmc.SleepTime)
 168                                 fd, err := os.OpenFile(
 169                                         statusPth, os.O_WRONLY|os.O_APPEND, os.FileMode(0666),
 170                                 )
 171                                 if err != nil {
 172                                         log.Println("OpenFile:", statusPth, err)
 173                                         continue
 174                                 }
 175                                 status, resp, err := c.GetUserStatus(u.Id, "")
 176                                 if err != nil {
 177                                         if DebugFd != nil {
 178                                                 spew.Fdump(DebugFd, resp)
 179                                         }
 180                                         log.Println("GetUserStatus:", err)
 181                                         fd.Close()
 182                                         continue
 183                                 }
 184                                 if DebugFd != nil {
 185                                         spew.Fdump(DebugFd, status)
 186                                 }
 187                                 fmt.Fprintf(fd, "%s\n", status.Status)
 188                                 fd.Close()
 189                         }
 190                 }(u)
 191
 192                 pth = path.Join(pth, "in")
 193                 os.Remove(pth)
 194                 if err := syscall.Mkfifo(pth, 0666); err != nil {
 195                         log.Fatalln(err)
 196                 }
 197                 go func(u *model.User) {
 198                         var dc *model.Channel
 199                         for {
 200                                 fd, err := os.OpenFile(pth, os.O_RDONLY, os.FileMode(0666))
 201                                 if err != nil {
 202                                         continue
 203                                 }
 204                                 data, err := io.ReadAll(fd)
 205                                 fd.Close()
 206                                 if err != nil {
 207                                         continue
 208                                 }
 209                                 if dc == nil {
 210                                         dc, resp, err = c.CreateDirectChannel(me.Id, u.Id)
 211                                         if err != nil {
 212                                                 if DebugFd != nil {
 213                                                         spew.Fdump(DebugFd, resp)
 214                                                 }
 215                                                 log.Println("CreateDirectChannel:", err)
 216                                                 continue
 217                                         }
 218                                         if DebugFd != nil {
 219                                                 spew.Fdump(DebugFd, dc)
 220                                         }
 221                                 }
 222                                 if _, err = makePost(c, dc.Id, string(data)); err != nil {
 223                                         log.Println("makePost:", err)
 224                                 }
 225                                 LastSent = time.Now()
 226                         }
 227                 }(u)
 228         }
 229
 230         Chans := make(map[string]*model.Channel)
 231         time.Sleep(mmc.SleepTime)
 232         page, resp, err := c.GetChannelsForTeamForUser(Team.Id, me.Id, false, "")
 233         if err != nil {
 234                 if DebugFd != nil {
 235                         spew.Fdump(DebugFd, resp)
 236                 }
 237                 log.Fatalln(err)
 238         }
 239         if DebugFd != nil {
 240                 spew.Fdump(DebugFd, page)
 241         }
 242         for _, ch := range page {
 243                 if ch.Type == "D" {
 244                         continue
 245                 }
 246                 Chans[ch.Name] = ch
 247                 pth := path.Join("chans", strings.ReplaceAll(ch.Name, ".", "_"))
 248                 updateQueue = append(updateQueue, pth, ch.Id)
 249                 os.MkdirAll(pth, 0777)
 250                 rewriteIfChanged(path.Join(pth, "id"), ch.Id+"\n")
 251                 rewriteIfChanged(path.Join(pth, "info"), fmt.Sprintf(
 252                         "%s\n%s\n%s\n",
 253                         ch.DisplayName,
 254                         ch.Header,
 255                         ch.Purpose,
 256                 ))
 257                 if _, err := os.Stat(path.Join(pth, mmc.OutRec)); err != nil &&
 258                         errors.Is(err, fs.ErrNotExist) {
 259                         if _, err = os.OpenFile(
 260                                 path.Join(pth, mmc.OutRec), os.O_WRONLY|os.O_CREATE, 0o666,
 261                         ); err != nil {
 262                                 log.Fatalln(err)
 263                         }
 264                 }
 265
 266                 usersPth := path.Join(pth, "users")
 267                 os.Remove(usersPth)
 268                 if err := syscall.Mkfifo(usersPth, 0666); err != nil {
 269                         log.Fatalln(err)
 270                 }
 271                 go func(ch *model.Channel) {
 272                         for {
 273                                 time.Sleep(mmc.SleepTime)
 274                                 fd, err := os.OpenFile(
 275                                         usersPth, os.O_WRONLY|os.O_APPEND, os.FileMode(0666),
 276                                 )
 277                                 if err != nil {
 278                                         log.Println("OpenFile:", usersPth, err)
 279                                         continue
 280                                 }
 281                                 for pageNum := 0; ; pageNum++ {
 282                                         users, resp, err := c.GetUsersInChannel(ch.Id, pageNum, PerPage, "")
 283                                         if err != nil {
 284                                                 if DebugFd != nil {
 285                                                         spew.Fdump(DebugFd, resp)
 286                                                 }
 287                                                 log.Println("GetUsersInChannel:", err)
 288                                                 fd.Close()
 289                                                 continue
 290                                         }
 291                                         if DebugFd != nil {
 292                                                 spew.Fdump(DebugFd, users)
 293                                         }
 294                                         for _, u := range users {
 295                                                 fmt.Fprintf(fd, "%s\n", u.Username)
 296                                         }
 297                                         if len(users) < PerPage {
 298                                                 break
 299                                         }
 300                                 }
 301                                 fd.Close()
 302                         }
 303                 }(ch)
 304
 305                 pth = path.Join(pth, "in")
 306                 os.Remove(pth)
 307                 if err := syscall.Mkfifo(pth, 0666); err != nil {
 308                         log.Fatalln(err)
 309                 }
 310                 go func(ch *model.Channel) {
 311                         for {
 312                                 fd, err := os.OpenFile(pth, os.O_RDONLY, os.FileMode(0666))
 313                                 if err != nil {
 314                                         continue
 315                                 }
 316                                 data, err := io.ReadAll(fd)
 317                                 fd.Close()
 318                                 if err != nil {
 319                                         continue
 320                                 }
 321                                 if _, err = makePost(c, ch.Id, string(data)); err != nil {
 322                                         log.Println("makePost:", err)
 323                                 }
 324                                 LastSent = time.Now()
 325                         }
 326                 }(ch)
 327         }
 328
 329         go func() {
 330                 log.Println("syncing", len(Chans)+len(Users), "rooms")
 331                 for len(updateQueue) > 0 {
 332                         err := updatePosts(c, Users, updateQueue[0], updateQueue[1])
 333                         if err != nil {
 334                                 log.Println("updatePosts:", err)
 335                         }
 336                         updateQueue = updateQueue[2:]
 337                 }
 338                 log.Println("sync done")
 339         }()
 340
 341         go func() {
 342                 os.MkdirAll("file", 0777)
 343                 pthGet := path.Join("file", "get")
 344                 os.Remove(pthGet)
 345                 if err := syscall.Mkfifo(pthGet, 0666); err != nil {
 346                         log.Fatalln(err)
 347                 }
 348                 pthOut := path.Join("file", "out")
 349                 os.Remove(pthOut)
 350                 if err := syscall.Mkfifo(pthOut, 0666); err != nil {
 351                         log.Fatalln(err)
 352                 }
 353                 for {
 354                         time.Sleep(mmc.SleepTime)
 355                         fd, err := os.OpenFile(pthGet, os.O_RDONLY, os.FileMode(0666))
 356                         if err != nil {
 357                                 continue
 358                         }
 359                         data, err := io.ReadAll(fd)
 360                         fd.Close()
 361                         if err != nil {
 362                                 continue
 363                         }
 364                         fileId := strings.TrimRight(string(data), " \n")
 365                         if len(fileId) == 0 {
 366                                 continue
 367                         }
 368                         fi, resp, err := c.GetFileInfo(fileId)
 369                         if DebugFd != nil {
 370                                 spew.Fdump(DebugFd, fi, resp)
 371                         }
 372                         if err != nil {
 373                                 log.Println(err)
 374                                 continue
 375                         }
 376                         if fi == nil {
 377                                 fmt.Println(resp)
 378                                 continue
 379                         }
 380                         data, resp, err = c.GetFile(fileId)
 381                         if err != nil {
 382                                 if DebugFd != nil {
 383                                         spew.Fdump(DebugFd, resp)
 384                                 }
 385                                 log.Println(err)
 386                                 continue
 387                         }
 388                         fd, err = os.OpenFile(
 389                                 pthOut, os.O_WRONLY|os.O_APPEND, os.FileMode(0666),
 390                         )
 391                         if err != nil {
 392                                 log.Println(err)
 393                                 continue
 394                         }
 395                         w := tar.NewWriter(fd)
 396                         if err = w.WriteHeader(&tar.Header{
 397                                 Format:   tar.FormatPAX,
 398                                 Typeflag: tar.TypeReg,
 399                                 Name:     fi.Name,
 400                                 Size:     int64(len(data)),
 401                                 Mode:     0o666,
 402                                 ModTime:  time.Unix(fi.CreateAt/1000, 0),
 403                                 PAXRecords: map[string]string{
 404                                         "MM.FileId":   fi.Id,
 405                                         "MM.MIMEType": fi.MimeType,
 406                                 },
 407                         }); err != nil {
 408                                 log.Println(err)
 409                                 fd.Close()
 410                                 continue
 411                         }
 412                         if _, err = io.Copy(w, bytes.NewReader(data)); err != nil {
 413                                 log.Println(err)
 414                                 fd.Close()
 415                                 continue
 416                         }
 417                         err = w.Close()
 418                         fd.Close()
 419                         if err != nil {
 420                                 log.Println(err)
 421                         }
 422                 }
 423         }()
 424
 425         needsShutdown := make(chan os.Signal)
 426         wc, err := model.NewWebSocketClient4("wss://"+*entrypoint, c.AuthToken)
 427         if err != nil {
 428                 log.Fatalln(err)
 429         }
 430         go func() {
 431                 wc.Listen()
 432                 t := time.NewTicker(time.Minute)
 433                 for {
 434                         select {
 435                         case <-t.C:
 436                                 if time.Now().Before(LastSent.Add(time.Minute)) {
 437                                         continue
 438                                 }
 439                                 wc.SendMessage("ping", nil)
 440                                 if *heartbeatCh != "" {
 441                                         if _, _, err = c.ViewChannel(
 442                                                 me.Id,
 443                                                 &model.ChannelView{ChannelId: Chans[*heartbeatCh].Id},
 444                                         ); err != nil {
 445                                                 log.Println("ChannelView:", err)
 446                                         }
 447                                 }
 448                         case <-wc.PingTimeoutChannel:
 449                                 log.Println("PING timeout")
 450                                 needsShutdown <- syscall.SIGTERM
 451                         case e := <-wc.EventChannel:
 452                                 if e == nil || !e.IsValid() {
 453                                         continue
 454                                 }
 455                                 data := e.GetData()
 456                                 if DebugFd != nil {
 457                                         spew.Fdump(DebugFd, e.EventType(), data)
 458                                 }
 459                                 var user *model.User
 460                                 if userId, ok := data["user_id"]; ok && userId.(string) != "" {
 461                                         user = Users[userId.(string)]
 462                                         if user == nil {
 463                                                 log.Println("unknown user for event:", e)
 464                                                 continue
 465                                         }
 466                                 }
 467                                 switch eventType := e.EventType(); eventType {
 468                                 case model.WebsocketEventTyping:
 469                                         if *notifyCmd != "" {
 470                                                 exec.Command(*notifyCmd, "typing: "+user.Username).Run()
 471                                         }
 472                                 case model.WebsocketEventPostEdited,
 473                                         model.WebsocketEventPostDeleted,
 474                                         model.WebsocketEventPosted:
 475                                         chName := data["channel_name"].(string)
 476                                         var post model.Post
 477                                         if err = json.NewDecoder(
 478                                                 strings.NewReader(data["post"].(string)),
 479                                         ).Decode(&post); err != nil {
 480                                                 log.Fatalln(err)
 481                                         }
 482                                         var recipient string
 483                                         switch model.ChannelType(data["channel_type"].(string)) {
 484                                         case model.ChannelTypeDirect:
 485                                                 userId := strings.TrimPrefix(chName, me.Id+"__")
 486                                                 userId = strings.TrimSuffix(userId, "__"+me.Id)
 487                                                 user := Users[userId]
 488                                                 if user == nil {
 489                                                         log.Println("unknown user:", post)
 490                                                         continue
 491                                                 }
 492                                                 recipient = path.Join("users", user.Username)
 493                                         case model.ChannelTypeOpen:
 494                                                 fallthrough
 495                                         case model.ChannelTypePrivate:
 496                                                 fallthrough
 497                                         case model.ChannelTypeGroup:
 498                                                 recipient = path.Join("chans", chName)
 499                                         }
 500                                         if err = writePosts(
 501                                                 recipient, Users, []mmc.Post{{P: &post, E: eventType}},
 502                                         ); err != nil {
 503                                                 log.Fatalln(err)
 504                                         }
 505                                 case model.WebsocketEventStatusChange:
 506                                         log.Println("status change:", user.Username, "->", data["status"].(string))
 507                                         if *notifyCmd != "" {
 508                                                 exec.Command(*notifyCmd, fmt.Sprintf(
 509                                                         "status: %s -> %s",
 510                                                         user.Username, data["status"].(string),
 511                                                 )).Run()
 512                                         }
 513                                 case model.WebsocketEventHello:
 514                                 case model.WebsocketEventChannelViewed:
 515                                 default:
 516                                         log.Println(e)
 517                                 }
 518                         case resp := <-wc.ResponseChannel:
 519                                 if resp == nil || !resp.IsValid() {
 520                                         continue
 521                                 }
 522                                 if DebugFd != nil {
 523                                         spew.Fdump(DebugFd, resp)
 524                                 }
 525                                 if text, ok := resp.Data["text"].(string); ok && text == "pong" {
 526                                         LastSent = time.Now()
 527                                 }
 528                         }
 529                 }
 530         }()
 531
 532         signal.Notify(needsShutdown, syscall.SIGTERM, syscall.SIGINT)
 533         <-needsShutdown
 534         c.Logout()
 535         log.Println("finished")
 536 }