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         "sync"
  36         "syscall"
  37         "time"
  38
  39         "github.com/davecgh/go-spew/spew"
  40         "github.com/mattermost/mattermost-server/v6/model"
  41         "go.stargrave.org/mmc"
  42 )
  43
  44 const CmdFile = "/FILE "
  45
  46 var (
  47         Newwin   = flag.String("newwin", "cmd/newwin", "Path to newwin command")
  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 mkFifo(pth string) {
  62         if _, err := os.Stat(pth); err == nil {
  63                 return
  64         }
  65         if err := syscall.Mkfifo(pth, 0666); err != nil {
  66                 log.Fatalln(err)
  67         }
  68 }
  69
  70 func main() {
  71         entrypoint := flag.String("entrypoint", mmc.GetEntrypoint(), "Entrypoint")
  72         notifyCmd := flag.String("notify", "cmd/notify", "Path to notification handler")
  73         heartbeatCh := flag.String("heartbeat-ch", "town-square", "Channel for heartbeating")
  74         flag.Parse()
  75         log.SetFlags(log.Lshortfile)
  76         log.SetOutput(os.Stdout)
  77         UmaskCur = syscall.Umask(0)
  78         syscall.Umask(UmaskCur)
  79
  80         mkFifo("debug")
  81         var err error
  82         DebugFd, err = os.OpenFile(
  83                 "debug", os.O_WRONLY|os.O_APPEND, os.FileMode(0666),
  84         )
  85         if err != nil {
  86                 log.Fatalln(err)
  87         }
  88         defer DebugFd.Close()
  89
  90         login, password := mmc.FindInNetrc(*entrypoint)
  91         if login == "" || password == "" {
  92                 log.Fatalln("no credentials found for:", *entrypoint)
  93         }
  94         c := model.NewAPIv4Client("https://" + *entrypoint)
  95         c.Login(login, password)
  96         me, resp, err := c.GetMe("")
  97         if err != nil {
  98                 if DebugFd != nil {
  99                         spew.Fdump(DebugFd, resp)
 100                 }
 101                 log.Fatalln(err)
 102         }
 103         if DebugFd != nil {
 104                 spew.Fdump(DebugFd, me)
 105         }
 106         log.Println("logged in")
 107
 108         time.Sleep(mmc.SleepTime)
 109         teams, resp, err := c.GetTeamsForUser(me.Id, "")
 110         if err != nil {
 111                 if DebugFd != nil {
 112                         spew.Fdump(DebugFd, resp)
 113                 }
 114                 log.Fatalln(err)
 115         }
 116         if DebugFd != nil {
 117                 spew.Fdump(DebugFd, teams)
 118         }
 119         Team := teams[0]
 120
 121         var updateQueue []string
 122         Chans := make(map[string]*model.Channel)
 123         time.Sleep(mmc.SleepTime)
 124         page, resp, err := c.GetChannelsForTeamForUser(Team.Id, me.Id, false, "")
 125         if err != nil {
 126                 if DebugFd != nil {
 127                         spew.Fdump(DebugFd, resp)
 128                 }
 129                 log.Fatalln(err)
 130         }
 131         if DebugFd != nil {
 132                 spew.Fdump(DebugFd, page)
 133         }
 134         for _, ch := range page {
 135                 if ch.Type == "D" {
 136                         continue
 137                 }
 138                 Chans[ch.Name] = ch
 139                 pth := path.Join("chans", strings.ReplaceAll(ch.Name, ".", "_"))
 140                 updateQueue = append(updateQueue, pth, ch.Id)
 141                 os.MkdirAll(pth, 0777)
 142                 rewriteIfChanged(path.Join(pth, "id"), ch.Id+"\n")
 143                 rewriteIfChanged(path.Join(pth, "info"), fmt.Sprintf(
 144                         "%s\n%s\n%s\n",
 145                         ch.DisplayName,
 146                         ch.Header,
 147                         ch.Purpose,
 148                 ))
 149                 if _, err := os.Stat(path.Join(pth, mmc.OutRec)); err != nil &&
 150                         errors.Is(err, fs.ErrNotExist) {
 151                         if _, err = os.OpenFile(
 152                                 path.Join(pth, mmc.OutRec), os.O_WRONLY|os.O_CREATE, 0o666,
 153                         ); err != nil {
 154                                 log.Fatalln(err)
 155                         }
 156                 }
 157
 158                 usersPth := path.Join(pth, "users")
 159                 mkFifo(usersPth)
 160                 go func(ch *model.Channel) {
 161                         for {
 162                                 time.Sleep(mmc.SleepTime)
 163                                 fd, err := os.OpenFile(
 164                                         usersPth, os.O_WRONLY|os.O_APPEND, os.FileMode(0666),
 165                                 )
 166                                 if err != nil {
 167                                         log.Println("OpenFile:", usersPth, err)
 168                                         continue
 169                                 }
 170                                 for n := 0; ; n++ {
 171                                         users, resp, err := c.GetUsersInChannel(ch.Id, n, mmc.PerPage, "")
 172                                         if err != nil {
 173                                                 if DebugFd != nil {
 174                                                         spew.Fdump(DebugFd, resp)
 175                                                 }
 176                                                 log.Println("GetUsersInChannel:", err)
 177                                                 fd.Close()
 178                                                 continue
 179                                         }
 180                                         if DebugFd != nil {
 181                                                 spew.Fdump(DebugFd, users)
 182                                         }
 183                                         for _, u := range users {
 184                                                 fmt.Fprintf(fd, "%s\n", u.Username)
 185                                         }
 186                                         if len(users) < mmc.PerPage {
 187                                                 break
 188                                         }
 189                                 }
 190                                 fd.Close()
 191                         }
 192                 }(ch)
 193
 194                 pth = path.Join(pth, "in")
 195                 mkFifo(pth)
 196                 go func(ch *model.Channel) {
 197                         for {
 198                                 fd, err := os.OpenFile(pth, os.O_RDONLY, os.FileMode(0666))
 199                                 if err != nil {
 200                                         continue
 201                                 }
 202                                 data, err := io.ReadAll(fd)
 203                                 fd.Close()
 204                                 if err != nil {
 205                                         continue
 206                                 }
 207                                 if _, err = makePost(c, ch.Id, string(data)); err != nil {
 208                                         log.Println("makePost:", err)
 209                                 }
 210                         }
 211                 }(ch)
 212         }
 213
 214         Users, err := mmc.GetUsers(c, DebugFd)
 215         if err != nil {
 216                 log.Fatalln(err)
 217         }
 218
 219         UsersDC := make(map[string]*model.Channel, len(Users))
 220         for _, u := range Users {
 221                 pth := path.Join("users", strings.ReplaceAll(u.Username, ".", "_"))
 222                 os.MkdirAll(pth, 0777)
 223                 rewriteIfChanged(
 224                         path.Join(pth, "name"),
 225                         fmt.Sprintf("%s %s\n", u.FirstName, u.LastName),
 226                 )
 227                 rewriteIfChanged(path.Join(pth, "email"), u.Email+"\n")
 228                 rewriteIfChanged(path.Join(pth, "id"), u.Id+"\n")
 229                 if _, err := os.Stat(path.Join(pth, mmc.OutRec)); err != nil &&
 230                         errors.Is(err, fs.ErrNotExist) {
 231                         if _, err = os.OpenFile(
 232                                 path.Join(pth, mmc.OutRec), os.O_WRONLY|os.O_CREATE, 0o666,
 233                         ); err != nil {
 234                                 log.Fatalln(err)
 235                         }
 236                 }
 237
 238                 if fi, err := os.Stat(path.Join(pth, mmc.OutRec)); err == nil && fi.Size() > 0 {
 239                         time.Sleep(mmc.SleepTime)
 240                         dc, resp, err := c.CreateDirectChannel(me.Id, u.Id)
 241                         if err != nil {
 242                                 if DebugFd != nil {
 243                                         spew.Fdump(DebugFd, resp)
 244                                 }
 245                                 log.Println("CreateDirectChannel:", err)
 246                                 continue
 247                         }
 248                         if DebugFd != nil {
 249                                 spew.Fdump(DebugFd, dc)
 250                         }
 251                         UsersDC[u.Id] = dc
 252                         updateQueue = append(updateQueue, pth, dc.Id)
 253                 }
 254
 255                 statusPth := path.Join(pth, "status")
 256                 mkFifo(statusPth)
 257                 go func(u *model.User) {
 258                         for {
 259                                 time.Sleep(mmc.SleepTime)
 260                                 fd, err := os.OpenFile(
 261                                         statusPth, os.O_WRONLY|os.O_APPEND, os.FileMode(0666),
 262                                 )
 263                                 if err != nil {
 264                                         log.Println("OpenFile:", statusPth, err)
 265                                         continue
 266                                 }
 267                                 status, resp, err := c.GetUserStatus(u.Id, "")
 268                                 if err != nil {
 269                                         if DebugFd != nil {
 270                                                 spew.Fdump(DebugFd, resp)
 271                                         }
 272                                         log.Println("GetUserStatus:", err)
 273                                         fd.Close()
 274                                         continue
 275                                 }
 276                                 if DebugFd != nil {
 277                                         spew.Fdump(DebugFd, status)
 278                                 }
 279                                 fmt.Fprintf(fd, "%s\n", status.Status)
 280                                 fd.Close()
 281                         }
 282                 }(u)
 283
 284                 pth = path.Join(pth, "in")
 285                 mkFifo(pth)
 286                 go func(u *model.User) {
 287                         var dc *model.Channel
 288                         for {
 289                                 fd, err := os.OpenFile(pth, os.O_RDONLY, os.FileMode(0666))
 290                                 if err != nil {
 291                                         continue
 292                                 }
 293                                 data, err := io.ReadAll(fd)
 294                                 fd.Close()
 295                                 if err != nil {
 296                                         continue
 297                                 }
 298                                 dc = UsersDC[u.Id]
 299                                 if dc == nil {
 300                                         dc, resp, err = c.CreateDirectChannel(me.Id, u.Id)
 301                                         if err != nil {
 302                                                 if DebugFd != nil {
 303                                                         spew.Fdump(DebugFd, resp)
 304                                                 }
 305                                                 log.Println("CreateDirectChannel:", err)
 306                                                 continue
 307                                         }
 308                                         UsersDC[u.Id] = dc
 309                                         if DebugFd != nil {
 310                                                 spew.Fdump(DebugFd, dc)
 311                                         }
 312                                 }
 313                                 if _, err = makePost(c, dc.Id, string(data)); err != nil {
 314                                         log.Println("makePost:", err)
 315                                 }
 316                         }
 317                 }(u)
 318         }
 319
 320         UserStatus := make(map[string]string)
 321         var UserStatusM sync.RWMutex
 322         go func() {
 323                 pth := path.Join("users", "status")
 324                 mkFifo(pth)
 325                 for {
 326                         time.Sleep(mmc.SleepTime)
 327                         fd, err := os.OpenFile(pth, os.O_WRONLY|os.O_APPEND, os.FileMode(0666))
 328                         if err != nil {
 329                                 log.Println("OpenFile:", pth, err)
 330                                 continue
 331                         }
 332                         agg := make(map[string][]string)
 333                         UserStatusM.RLock()
 334                         for name, status := range UserStatus {
 335                                 agg[status] = append(agg[status], name)
 336                         }
 337                         UserStatusM.RUnlock()
 338                         statuses := make([]string, 0, len(agg))
 339                         for status := range agg {
 340                                 sort.Strings(agg[status])
 341                                 statuses = append(statuses, status)
 342                         }
 343                         sort.Strings(statuses)
 344                         for _, status := range statuses {
 345                                 fmt.Fprintln(fd, status+":", strings.Join(agg[status], " "))
 346                         }
 347                         fd.Close()
 348                 }
 349         }()
 350
 351         log.Println("syncing", len(updateQueue)/2, "rooms")
 352         for len(updateQueue) > 0 {
 353                 err := updatePosts(c, Users, updateQueue[0], updateQueue[1])
 354                 if err != nil {
 355                         log.Println("updatePosts:", err)
 356                 }
 357                 updateQueue = updateQueue[2:]
 358         }
 359         log.Println("sync done")
 360         if *notifyCmd != "" {
 361                 exec.Command(*notifyCmd, "sync done").Run()
 362         }
 363
 364         go func() {
 365                 os.MkdirAll("file", 0777)
 366                 pthGet := path.Join("file", "get")
 367                 mkFifo(pthGet)
 368                 pthOut := path.Join("file", "out")
 369                 mkFifo(pthOut)
 370                 for {
 371                         time.Sleep(mmc.SleepTime)
 372                         fd, err := os.OpenFile(pthGet, os.O_RDONLY, os.FileMode(0666))
 373                         if err != nil {
 374                                 continue
 375                         }
 376                         data, err := io.ReadAll(fd)
 377                         fd.Close()
 378                         if err != nil {
 379                                 continue
 380                         }
 381                         fileId := strings.TrimRight(string(data), " \n")
 382                         if len(fileId) == 0 {
 383                                 continue
 384                         }
 385                         fi, resp, err := c.GetFileInfo(fileId)
 386                         if DebugFd != nil {
 387                                 spew.Fdump(DebugFd, fi, resp)
 388                         }
 389                         if err != nil {
 390                                 log.Println(err)
 391                                 continue
 392                         }
 393                         if fi == nil {
 394                                 fmt.Println(resp)
 395                                 continue
 396                         }
 397                         data, resp, err = c.GetFile(fileId)
 398                         if err != nil {
 399                                 if DebugFd != nil {
 400                                         spew.Fdump(DebugFd, resp)
 401                                 }
 402                                 log.Println(err)
 403                                 continue
 404                         }
 405                         fd, err = os.OpenFile(
 406                                 pthOut, os.O_WRONLY|os.O_APPEND, os.FileMode(0666),
 407                         )
 408                         if err != nil {
 409                                 log.Println(err)
 410                                 continue
 411                         }
 412                         w := tar.NewWriter(fd)
 413                         if err = w.WriteHeader(&tar.Header{
 414                                 Format:   tar.FormatPAX,
 415                                 Typeflag: tar.TypeReg,
 416                                 Name:     fi.Name,
 417                                 Size:     int64(len(data)),
 418                                 Mode:     0o666,
 419                                 ModTime:  time.Unix(fi.CreateAt/1000, 0),
 420                                 PAXRecords: map[string]string{
 421                                         "MM.FileId":   fi.Id,
 422                                         "MM.MIMEType": fi.MimeType,
 423                                 },
 424                         }); err != nil {
 425                                 log.Println(err)
 426                                 fd.Close()
 427                                 continue
 428                         }
 429                         if _, err = io.Copy(w, bytes.NewReader(data)); err != nil {
 430                                 log.Println(err)
 431                                 fd.Close()
 432                                 continue
 433                         }
 434                         err = w.Close()
 435                         fd.Close()
 436                         if err != nil {
 437                                 log.Println(err)
 438                         }
 439                 }
 440         }()
 441
 442         needsShutdown := make(chan os.Signal)
 443         wc, err := model.NewWebSocketClient4("wss://"+*entrypoint, c.AuthToken)
 444         if err != nil {
 445                 log.Fatalln(err)
 446         }
 447         go func() {
 448                 wc.Listen()
 449                 wc.GetStatuses()
 450                 t := time.NewTicker(time.Minute)
 451                 for {
 452                         select {
 453                         case <-t.C:
 454                                 if wc.ListenError != nil {
 455                                         log.Println("ListenError:", wc.ListenError)
 456                                         needsShutdown <- syscall.SIGTERM
 457                                         return
 458                                 }
 459                                 wc.GetStatuses()
 460                                 if *heartbeatCh != "" {
 461                                         if _, _, err = c.ViewChannel(
 462                                                 me.Id,
 463                                                 &model.ChannelView{ChannelId: Chans[*heartbeatCh].Id},
 464                                         ); err != nil {
 465                                                 log.Println("ChannelView:", err)
 466                                         }
 467                                 }
 468                         case <-wc.PingTimeoutChannel:
 469                                 log.Println("PING timeout")
 470                                 needsShutdown <- syscall.SIGTERM
 471                                 return
 472                         case e := <-wc.EventChannel:
 473                                 if e == nil || !e.IsValid() {
 474                                         continue
 475                                 }
 476                                 if DebugFd != nil {
 477                                         spew.Fdump(DebugFd, e)
 478                                 }
 479                                 data := e.GetData()
 480                                 var user *model.User
 481                                 if userId, ok := data["user_id"]; ok && userId.(string) != "" {
 482                                         user = Users[userId.(string)]
 483                                         if user == nil {
 484                                                 log.Println("unknown user for event:", e)
 485                                                 continue
 486                                         }
 487                                 }
 488                                 switch eventType := e.EventType(); eventType {
 489                                 case model.WebsocketEventTyping:
 490                                         if *notifyCmd != "" {
 491                                                 exec.Command(*notifyCmd, "typing: "+user.Username).Run()
 492                                         }
 493                                 case model.WebsocketEventPostEdited,
 494                                         model.WebsocketEventPostDeleted,
 495                                         model.WebsocketEventPosted:
 496                                         chName, ok := data["channel_name"].(string)
 497                                         if !ok {
 498                                                 continue
 499                                         }
 500                                         var post model.Post
 501                                         if err = json.NewDecoder(
 502                                                 strings.NewReader(data["post"].(string)),
 503                                         ).Decode(&post); err != nil {
 504                                                 log.Fatalln(err)
 505                                         }
 506                                         var recipient string
 507                                         switch model.ChannelType(data["channel_type"].(string)) {
 508                                         case model.ChannelTypeDirect:
 509                                                 userId := strings.TrimPrefix(chName, me.Id+"__")
 510                                                 userId = strings.TrimSuffix(userId, "__"+me.Id)
 511                                                 user := Users[userId]
 512                                                 if user == nil {
 513                                                         log.Println("unknown user:", post)
 514                                                         continue
 515                                                 }
 516                                                 recipient = path.Join("users", user.Username)
 517                                         case model.ChannelTypeOpen:
 518                                                 fallthrough
 519                                         case model.ChannelTypePrivate:
 520                                                 fallthrough
 521                                         case model.ChannelTypeGroup:
 522                                                 recipient = path.Join("chans", chName)
 523                                         }
 524                                         if err = writePosts(
 525                                                 recipient, Users, []mmc.Post{{P: &post, E: eventType}},
 526                                         ); err != nil {
 527                                                 log.Fatalln(err)
 528                                         }
 529                                 case model.WebsocketEventStatusChange:
 530                                         status := data["status"].(string)
 531                                         UserStatusM.Lock()
 532                                         UserStatus[user.Username] = status
 533                                         UserStatusM.Unlock()
 534                                         if *notifyCmd != "" {
 535                                                 exec.Command(*notifyCmd, fmt.Sprintf(
 536                                                         "status: %s -> %s", user.Username, status,
 537                                                 )).Run()
 538                                         }
 539                                 case model.WebsocketEventHello:
 540                                 case model.WebsocketEventChannelViewed:
 541                                 default:
 542                                         log.Println(e)
 543                                 }
 544                         case resp := <-wc.ResponseChannel:
 545                                 if resp == nil || !resp.IsValid() {
 546                                         continue
 547                                 }
 548                                 if DebugFd != nil {
 549                                         spew.Fdump(DebugFd, resp)
 550                                 }
 551                                 statuses := make(map[string]string)
 552                                 for userId, status := range resp.Data {
 553                                         status, ok := status.(string)
 554                                         if !ok {
 555                                                 continue
 556                                         }
 557                                         user := Users[userId]
 558                                         if user == nil {
 559                                                 continue
 560                                         }
 561                                         statuses[user.Username] = status
 562                                 }
 563                                 if len(statuses) > 0 {
 564                                         UserStatusM.Lock()
 565                                         for u := range UserStatus {
 566                                                 delete(UserStatus, u)
 567                                         }
 568                                         for u, status := range statuses {
 569                                                 UserStatus[u] = status
 570                                         }
 571                                         UserStatusM.Unlock()
 572                                 }
 573                         }
 574                 }
 575         }()
 576
 577         signal.Notify(needsShutdown, syscall.SIGTERM, syscall.SIGINT)
 578         <-needsShutdown
 579         c.Logout()
 580         log.Println("finished")
 581 }