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         "sort"
  34         "strings"
  35         "syscall"
  36         "time"
  37
  38         "github.com/davecgh/go-spew/spew"
  39         "github.com/mattermost/mattermost-server/v6/model"
  40         "go.stargrave.org/mmc"
  41 )
  42
  43 const CmdFile = "/FILE "
  44
  45 var (
  46         Newwin    = flag.String("newwin", "cmd/newwin", "Path to newwin command")
  47         DebugFifo = flag.String("debug", "", "Path to debug FIFO to be created")
  48         DebugFd   *os.File
  49         UmaskCur  int
  50 )
  51
  52 func rewriteIfChanged(fn string, data string) {
  53         if their, err := os.ReadFile(fn); err != nil ||
  54                 bytes.Compare([]byte(data), their) != 0 {
  55                 if err = os.WriteFile(fn, []byte(data), 0o666); err != nil {
  56                         log.Fatalln(err)
  57                 }
  58         }
  59 }
  60
  61 func main() {
  62         entrypoint := flag.String("entrypoint", mmc.GetEntrypoint(), "Entrypoint")
  63         notifyCmd := flag.String("notify", "cmd/notify", "Path to notification handler")
  64         heartbeatCh := flag.String("heartbeat-ch", "town-square", "Channel for heartbeating")
  65         userStatusFifo := flag.String("user-status", "", "Path to FIFO for user statuses")
  66         flag.Parse()
  67         log.SetFlags(log.Lshortfile)
  68         log.SetOutput(os.Stdout)
  69         UmaskCur = syscall.Umask(0)
  70         syscall.Umask(UmaskCur)
  71
  72         var err error
  73         if *DebugFifo != "" {
  74                 DebugFd, err = os.OpenFile(
  75                         *DebugFifo, os.O_WRONLY|os.O_APPEND, os.FileMode(0666),
  76                 )
  77                 if err != nil {
  78                         log.Fatalln(err)
  79                 }
  80                 defer DebugFd.Close()
  81         }
  82
  83         login, password := mmc.FindInNetrc(*entrypoint)
  84         if login == "" || password == "" {
  85                 log.Fatalln("no credentials found for:", *entrypoint)
  86         }
  87         c := model.NewAPIv4Client("https://" + *entrypoint)
  88         c.Login(login, password)
  89         me, resp, err := c.GetMe("")
  90         if err != nil {
  91                 if DebugFd != nil {
  92                         spew.Fdump(DebugFd, resp)
  93                 }
  94                 log.Fatalln(err)
  95         }
  96         if DebugFd != nil {
  97                 spew.Fdump(DebugFd, me)
  98         }
  99         log.Println("logged in")
 100
 101         time.Sleep(mmc.SleepTime)
 102         teams, resp, err := c.GetTeamsForUser(me.Id, "")
 103         if err != nil {
 104                 if DebugFd != nil {
 105                         spew.Fdump(DebugFd, resp)
 106                 }
 107                 log.Fatalln(err)
 108         }
 109         if DebugFd != nil {
 110                 spew.Fdump(DebugFd, teams)
 111         }
 112         Team := teams[0]
 113
 114         var updateQueue []string
 115         LastSent := time.Now()
 116
 117         Users, err := mmc.GetUsers(c, DebugFd)
 118         if err != nil {
 119                 log.Fatalln(err)
 120         }
 121
 122         UsersDC := make(map[string]*model.Channel, len(Users))
 123         userIds := make([]string, 0, len(Users))
 124         for _, u := range Users {
 125                 userIds = append(userIds, u.Id)
 126                 pth := path.Join("users", strings.ReplaceAll(u.Username, ".", "_"))
 127                 os.MkdirAll(pth, 0777)
 128                 rewriteIfChanged(
 129                         path.Join(pth, "name"),
 130                         fmt.Sprintf("%s %s\n", u.FirstName, u.LastName),
 131                 )
 132                 rewriteIfChanged(path.Join(pth, "email"), u.Email+"\n")
 133                 rewriteIfChanged(path.Join(pth, "id"), u.Id+"\n")
 134                 if _, err := os.Stat(path.Join(pth, mmc.OutRec)); err != nil &&
 135                         errors.Is(err, fs.ErrNotExist) {
 136                         if _, err = os.OpenFile(
 137                                 path.Join(pth, mmc.OutRec), os.O_WRONLY|os.O_CREATE, 0o666,
 138                         ); err != nil {
 139                                 log.Fatalln(err)
 140                         }
 141                 }
 142
 143                 if fi, err := os.Stat(path.Join(pth, mmc.OutRec)); err == nil && fi.Size() > 0 {
 144                         time.Sleep(mmc.SleepTime)
 145                         dc, resp, err := c.CreateDirectChannel(me.Id, u.Id)
 146                         if err != nil {
 147                                 if DebugFd != nil {
 148                                         spew.Fdump(DebugFd, resp)
 149                                 }
 150                                 log.Println("CreateDirectChannel:", err)
 151                                 continue
 152                         }
 153                         if DebugFd != nil {
 154                                 spew.Fdump(DebugFd, dc)
 155                         }
 156                         UsersDC[u.Id] = dc
 157                         updateQueue = append(updateQueue, pth, dc.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                                 dc = UsersDC[u.Id]
 210                                 if dc == nil {
 211                                         dc, resp, err = c.CreateDirectChannel(me.Id, u.Id)
 212                                         if err != nil {
 213                                                 if DebugFd != nil {
 214                                                         spew.Fdump(DebugFd, resp)
 215                                                 }
 216                                                 log.Println("CreateDirectChannel:", err)
 217                                                 continue
 218                                         }
 219                                         UsersDC[u.Id] = dc
 220                                         if DebugFd != nil {
 221                                                 spew.Fdump(DebugFd, dc)
 222                                         }
 223                                 }
 224                                 if _, err = makePost(c, dc.Id, string(data)); err != nil {
 225                                         log.Println("makePost:", err)
 226                                 }
 227                                 LastSent = time.Now()
 228                         }
 229                 }(u)
 230         }
 231
 232         UserStatus := make(map[string]string)
 233         updateUserStatus := func() {
 234                 statuses, resp, err := c.GetUsersStatusesByIds(userIds)
 235                 if err != nil {
 236                         if DebugFd != nil {
 237                                 spew.Fdump(DebugFd, resp)
 238                         }
 239                         log.Fatalln(err)
 240                 }
 241                 if DebugFd != nil {
 242                         spew.Fdump(DebugFd, teams)
 243                 }
 244                 for _, s := range statuses {
 245                         UserStatus[Users[s.UserId].Username] = s.Status
 246                 }
 247         }
 248         if *userStatusFifo != "" {
 249                 updateUserStatus()
 250                 go func() {
 251                         for {
 252                                 time.Sleep(mmc.SleepTime)
 253                                 fd, err := os.OpenFile(
 254                                         *userStatusFifo, os.O_WRONLY|os.O_APPEND, os.FileMode(0666),
 255                                 )
 256                                 if err != nil {
 257                                         log.Println("OpenFile:", *userStatusFifo, err)
 258                                         continue
 259                                 }
 260                                 statuses := make(map[string][]string)
 261                                 for name, status := range UserStatus {
 262                                         statuses[status] = append(statuses[status], name)
 263                                 }
 264                                 for status := range statuses {
 265                                         if status == "offline" {
 266                                                 continue
 267                                         }
 268                                         sort.Strings(statuses[status])
 269                                         fmt.Fprintln(fd, status+":", strings.Join(statuses[status], " "))
 270                                 }
 271                                 fd.Close()
 272                         }
 273                 }()
 274         }
 275
 276         Chans := make(map[string]*model.Channel)
 277         time.Sleep(mmc.SleepTime)
 278         page, resp, err := c.GetChannelsForTeamForUser(Team.Id, me.Id, false, "")
 279         if err != nil {
 280                 if DebugFd != nil {
 281                         spew.Fdump(DebugFd, resp)
 282                 }
 283                 log.Fatalln(err)
 284         }
 285         if DebugFd != nil {
 286                 spew.Fdump(DebugFd, page)
 287         }
 288         for _, ch := range page {
 289                 if ch.Type == "D" {
 290                         continue
 291                 }
 292                 Chans[ch.Name] = ch
 293                 pth := path.Join("chans", strings.ReplaceAll(ch.Name, ".", "_"))
 294                 updateQueue = append(updateQueue, pth, ch.Id)
 295                 os.MkdirAll(pth, 0777)
 296                 rewriteIfChanged(path.Join(pth, "id"), ch.Id+"\n")
 297                 rewriteIfChanged(path.Join(pth, "info"), fmt.Sprintf(
 298                         "%s\n%s\n%s\n",
 299                         ch.DisplayName,
 300                         ch.Header,
 301                         ch.Purpose,
 302                 ))
 303                 if _, err := os.Stat(path.Join(pth, mmc.OutRec)); err != nil &&
 304                         errors.Is(err, fs.ErrNotExist) {
 305                         if _, err = os.OpenFile(
 306                                 path.Join(pth, mmc.OutRec), os.O_WRONLY|os.O_CREATE, 0o666,
 307                         ); err != nil {
 308                                 log.Fatalln(err)
 309                         }
 310                 }
 311
 312                 usersPth := path.Join(pth, "users")
 313                 os.Remove(usersPth)
 314                 if err := syscall.Mkfifo(usersPth, 0666); err != nil {
 315                         log.Fatalln(err)
 316                 }
 317                 go func(ch *model.Channel) {
 318                         for {
 319                                 time.Sleep(mmc.SleepTime)
 320                                 fd, err := os.OpenFile(
 321                                         usersPth, os.O_WRONLY|os.O_APPEND, os.FileMode(0666),
 322                                 )
 323                                 if err != nil {
 324                                         log.Println("OpenFile:", usersPth, err)
 325                                         continue
 326                                 }
 327                                 for n := 0; ; n++ {
 328                                         users, resp, err := c.GetUsersInChannel(ch.Id, n, mmc.PerPage, "")
 329                                         if err != nil {
 330                                                 if DebugFd != nil {
 331                                                         spew.Fdump(DebugFd, resp)
 332                                                 }
 333                                                 log.Println("GetUsersInChannel:", err)
 334                                                 fd.Close()
 335                                                 continue
 336                                         }
 337                                         if DebugFd != nil {
 338                                                 spew.Fdump(DebugFd, users)
 339                                         }
 340                                         for _, u := range users {
 341                                                 fmt.Fprintf(fd, "%s\n", u.Username)
 342                                         }
 343                                         if len(users) < mmc.PerPage {
 344                                                 break
 345                                         }
 346                                 }
 347                                 fd.Close()
 348                         }
 349                 }(ch)
 350
 351                 pth = path.Join(pth, "in")
 352                 os.Remove(pth)
 353                 if err := syscall.Mkfifo(pth, 0666); err != nil {
 354                         log.Fatalln(err)
 355                 }
 356                 go func(ch *model.Channel) {
 357                         for {
 358                                 fd, err := os.OpenFile(pth, os.O_RDONLY, os.FileMode(0666))
 359                                 if err != nil {
 360                                         continue
 361                                 }
 362                                 data, err := io.ReadAll(fd)
 363                                 fd.Close()
 364                                 if err != nil {
 365                                         continue
 366                                 }
 367                                 if _, err = makePost(c, ch.Id, string(data)); err != nil {
 368                                         log.Println("makePost:", err)
 369                                 }
 370                                 LastSent = time.Now()
 371                         }
 372                 }(ch)
 373         }
 374
 375         log.Println("syncing", len(updateQueue)/2, "rooms")
 376         for len(updateQueue) > 0 {
 377                 err := updatePosts(c, Users, updateQueue[0], updateQueue[1])
 378                 if err != nil {
 379                         log.Println("updatePosts:", err)
 380                 }
 381                 updateQueue = updateQueue[2:]
 382         }
 383         log.Println("sync done")
 384         if *notifyCmd != "" {
 385                 exec.Command(*notifyCmd, "sync done").Run()
 386         }
 387
 388         go func() {
 389                 os.MkdirAll("file", 0777)
 390                 pthGet := path.Join("file", "get")
 391                 os.Remove(pthGet)
 392                 if err := syscall.Mkfifo(pthGet, 0666); err != nil {
 393                         log.Fatalln(err)
 394                 }
 395                 pthOut := path.Join("file", "out")
 396                 os.Remove(pthOut)
 397                 if err := syscall.Mkfifo(pthOut, 0666); err != nil {
 398                         log.Fatalln(err)
 399                 }
 400                 for {
 401                         time.Sleep(mmc.SleepTime)
 402                         fd, err := os.OpenFile(pthGet, os.O_RDONLY, os.FileMode(0666))
 403                         if err != nil {
 404                                 continue
 405                         }
 406                         data, err := io.ReadAll(fd)
 407                         fd.Close()
 408                         if err != nil {
 409                                 continue
 410                         }
 411                         fileId := strings.TrimRight(string(data), " \n")
 412                         if len(fileId) == 0 {
 413                                 continue
 414                         }
 415                         fi, resp, err := c.GetFileInfo(fileId)
 416                         if DebugFd != nil {
 417                                 spew.Fdump(DebugFd, fi, resp)
 418                         }
 419                         if err != nil {
 420                                 log.Println(err)
 421                                 continue
 422                         }
 423                         if fi == nil {
 424                                 fmt.Println(resp)
 425                                 continue
 426                         }
 427                         data, resp, err = c.GetFile(fileId)
 428                         if err != nil {
 429                                 if DebugFd != nil {
 430                                         spew.Fdump(DebugFd, resp)
 431                                 }
 432                                 log.Println(err)
 433                                 continue
 434                         }
 435                         fd, err = os.OpenFile(
 436                                 pthOut, os.O_WRONLY|os.O_APPEND, os.FileMode(0666),
 437                         )
 438                         if err != nil {
 439                                 log.Println(err)
 440                                 continue
 441                         }
 442                         w := tar.NewWriter(fd)
 443                         if err = w.WriteHeader(&tar.Header{
 444                                 Format:   tar.FormatPAX,
 445                                 Typeflag: tar.TypeReg,
 446                                 Name:     fi.Name,
 447                                 Size:     int64(len(data)),
 448                                 Mode:     0o666,
 449                                 ModTime:  time.Unix(fi.CreateAt/1000, 0),
 450                                 PAXRecords: map[string]string{
 451                                         "MM.FileId":   fi.Id,
 452                                         "MM.MIMEType": fi.MimeType,
 453                                 },
 454                         }); err != nil {
 455                                 log.Println(err)
 456                                 fd.Close()
 457                                 continue
 458                         }
 459                         if _, err = io.Copy(w, bytes.NewReader(data)); err != nil {
 460                                 log.Println(err)
 461                                 fd.Close()
 462                                 continue
 463                         }
 464                         err = w.Close()
 465                         fd.Close()
 466                         if err != nil {
 467                                 log.Println(err)
 468                         }
 469                 }
 470         }()
 471
 472         needsShutdown := make(chan os.Signal)
 473         wc, err := model.NewWebSocketClient4("wss://"+*entrypoint, c.AuthToken)
 474         if err != nil {
 475                 log.Fatalln(err)
 476         }
 477         go func() {
 478                 wc.Listen()
 479                 t := time.NewTicker(time.Minute)
 480                 for {
 481                         select {
 482                         case <-t.C:
 483                                 updateUserStatus()
 484                                 if time.Now().Before(LastSent.Add(time.Minute)) {
 485                                         continue
 486                                 }
 487                                 wc.SendMessage("ping", nil)
 488                                 if *heartbeatCh != "" {
 489                                         if _, _, err = c.ViewChannel(
 490                                                 me.Id,
 491                                                 &model.ChannelView{ChannelId: Chans[*heartbeatCh].Id},
 492                                         ); err != nil {
 493                                                 log.Println("ChannelView:", err)
 494                                         }
 495                                 }
 496                         case <-wc.PingTimeoutChannel:
 497                                 log.Println("PING timeout")
 498                                 needsShutdown <- syscall.SIGTERM
 499                         case e := <-wc.EventChannel:
 500                                 if e == nil || !e.IsValid() {
 501                                         continue
 502                                 }
 503                                 if DebugFd != nil {
 504                                         spew.Fdump(DebugFd, e)
 505                                 }
 506                                 data := e.GetData()
 507                                 var user *model.User
 508                                 if userId, ok := data["user_id"]; ok && userId.(string) != "" {
 509                                         user = Users[userId.(string)]
 510                                         if user == nil {
 511                                                 log.Println("unknown user for event:", e)
 512                                                 continue
 513                                         }
 514                                 }
 515                                 switch eventType := e.EventType(); eventType {
 516                                 case model.WebsocketEventTyping:
 517                                         if *notifyCmd != "" {
 518                                                 exec.Command(*notifyCmd, "typing: "+user.Username).Run()
 519                                         }
 520                                 case model.WebsocketEventPostEdited,
 521                                         model.WebsocketEventPostDeleted,
 522                                         model.WebsocketEventPosted:
 523                                         chName, ok := data["channel_name"].(string)
 524                                         if !ok {
 525                                                 continue
 526                                         }
 527                                         var post model.Post
 528                                         if err = json.NewDecoder(
 529                                                 strings.NewReader(data["post"].(string)),
 530                                         ).Decode(&post); err != nil {
 531                                                 log.Fatalln(err)
 532                                         }
 533                                         var recipient string
 534                                         switch model.ChannelType(data["channel_type"].(string)) {
 535                                         case model.ChannelTypeDirect:
 536                                                 userId := strings.TrimPrefix(chName, me.Id+"__")
 537                                                 userId = strings.TrimSuffix(userId, "__"+me.Id)
 538                                                 user := Users[userId]
 539                                                 if user == nil {
 540                                                         log.Println("unknown user:", post)
 541                                                         continue
 542                                                 }
 543                                                 recipient = path.Join("users", user.Username)
 544                                         case model.ChannelTypeOpen:
 545                                                 fallthrough
 546                                         case model.ChannelTypePrivate:
 547                                                 fallthrough
 548                                         case model.ChannelTypeGroup:
 549                                                 recipient = path.Join("chans", chName)
 550                                         }
 551                                         if err = writePosts(
 552                                                 recipient, Users, []mmc.Post{{P: &post, E: eventType}},
 553                                         ); err != nil {
 554                                                 log.Fatalln(err)
 555                                         }
 556                                 case model.WebsocketEventStatusChange:
 557                                         status := data["status"].(string)
 558                                         UserStatus[user.Username] = status
 559                                         if *notifyCmd != "" {
 560                                                 exec.Command(*notifyCmd, fmt.Sprintf(
 561                                                         "status: %s -> %s", user.Username, status,
 562                                                 )).Run()
 563                                         }
 564                                 case model.WebsocketEventHello:
 565                                 case model.WebsocketEventChannelViewed:
 566                                 default:
 567                                         log.Println(e)
 568                                 }
 569                         case resp := <-wc.ResponseChannel:
 570                                 if resp == nil || !resp.IsValid() {
 571                                         continue
 572                                 }
 573                                 if DebugFd != nil {
 574                                         spew.Fdump(DebugFd, resp)
 575                                 }
 576                                 if text, ok := resp.Data["text"].(string); ok && text == "pong" {
 577                                         LastSent = time.Now()
 578                                 }
 579                         }
 580                 }
 581         }()
 582
 583         signal.Notify(needsShutdown, syscall.SIGTERM, syscall.SIGINT)
 584         <-needsShutdown
 585         c.Logout()
 586         log.Println("finished")
 587 }