cmd/mmc/main.go

   1 // mmc -- Mattermost client
   2 // Copyright (C) 2023-2024 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.cypherpunks.ru/netrc"
  42         "go.stargrave.org/mmc"
  43 )
  44
  45 var (
  46         Newwin   = flag.String("newwin", "cmd/newwin", "Path to newwin command")
  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.Equal([]byte(data), their) {
  54                 if err = os.WriteFile(fn, []byte(data), 0o666); err != nil {
  55                         log.Fatalln(err)
  56                 }
  57         }
  58 }
  59
  60 func mkFifo(pth string) {
  61         if _, err := os.Stat(pth); err == nil {
  62                 return
  63         }
  64         if err := syscall.Mkfifo(pth, 0666); err != nil {
  65                 log.Fatalln(err)
  66         }
  67 }
  68
  69 func main() {
  70         entrypoint := flag.String("entrypoint", mmc.GetEntrypoint(), "Entrypoint")
  71         notifyCmd := flag.String("notify", "cmd/notify", "Path to notification handler")
  72         heartbeatCh := flag.String("heartbeat-ch", "town-square", "Channel for heartbeating")
  73         flag.Parse()
  74         log.SetFlags(log.Lshortfile)
  75         log.SetOutput(os.Stdout)
  76         UmaskCur = syscall.Umask(0)
  77         syscall.Umask(UmaskCur)
  78
  79         mkFifo("debug")
  80         var err error
  81         DebugFd, err = os.OpenFile(
  82                 "debug", os.O_WRONLY|os.O_APPEND, os.FileMode(0666),
  83         )
  84         if err != nil {
  85                 log.Fatalln(err)
  86         }
  87         defer DebugFd.Close()
  88
  89         login, password := netrc.Find(*entrypoint)
  90         if login == "" || password == "" {
  91                 log.Fatalln("no credentials found for:", *entrypoint)
  92         }
  93         c := model.NewAPIv4Client("https://" + *entrypoint)
  94         c.Login(login, password)
  95         me, resp, err := c.GetMe("")
  96         if err != nil {
  97                 if DebugFd != nil {
  98                         spew.Fdump(DebugFd, resp)
  99                 }
 100                 log.Fatalln(err)
 101         }
 102         if DebugFd != nil {
 103                 spew.Fdump(DebugFd, me)
 104         }
 105         log.Println("logged in")
 106
 107         time.Sleep(mmc.SleepTime)
 108         teams, resp, err := c.GetTeamsForUser(me.Id, "")
 109         if err != nil {
 110                 if DebugFd != nil {
 111                         spew.Fdump(DebugFd, resp)
 112                 }
 113                 log.Fatalln(err)
 114         }
 115         if DebugFd != nil {
 116                 spew.Fdump(DebugFd, teams)
 117         }
 118         Team := teams[0]
 119
 120         var updateQueue []string
 121         Chans := make(map[string]*model.Channel)
 122         time.Sleep(mmc.SleepTime)
 123         page, resp, err := c.GetChannelsForTeamForUser(Team.Id, me.Id, false, "")
 124         if err != nil {
 125                 if DebugFd != nil {
 126                         spew.Fdump(DebugFd, resp)
 127                 }
 128                 log.Fatalln(err)
 129         }
 130         if DebugFd != nil {
 131                 spew.Fdump(DebugFd, page)
 132         }
 133         for _, ch := range page {
 134                 if ch.Type == "D" {
 135                         continue
 136                 }
 137                 Chans[ch.Name] = ch
 138                 pth := path.Join("chans", strings.ReplaceAll(ch.Name, ".", "_"))
 139                 updateQueue = append(updateQueue, pth, ch.Id)
 140                 os.MkdirAll(pth, 0777)
 141                 rewriteIfChanged(path.Join(pth, "id"), ch.Id+"\n")
 142                 rewriteIfChanged(path.Join(pth, "info"), fmt.Sprintf(
 143                         "%s\n%s\n%s\n",
 144                         ch.DisplayName,
 145                         ch.Header,
 146                         ch.Purpose,
 147                 ))
 148                 if _, err := os.Stat(path.Join(pth, mmc.OutRec)); err != nil &&
 149                         errors.Is(err, fs.ErrNotExist) {
 150                         if _, err = os.OpenFile(
 151                                 path.Join(pth, mmc.OutRec), os.O_WRONLY|os.O_CREATE, 0o666,
 152                         ); err != nil {
 153                                 log.Fatalln(err)
 154                         }
 155                 }
 156
 157                 usersPth := path.Join(pth, "users")
 158                 mkFifo(usersPth)
 159                 go func(ch *model.Channel) {
 160                         for {
 161                                 time.Sleep(mmc.SleepTime)
 162                                 fd, err := os.OpenFile(
 163                                         usersPth, os.O_WRONLY|os.O_APPEND, os.FileMode(0666),
 164                                 )
 165                                 if err != nil {
 166                                         log.Println("OpenFile:", usersPth, err)
 167                                         continue
 168                                 }
 169                                 for n := 0; ; n++ {
 170                                         users, resp, err := c.GetUsersInChannel(ch.Id, n, mmc.PerPage, "")
 171                                         if err != nil {
 172                                                 if DebugFd != nil {
 173                                                         spew.Fdump(DebugFd, resp)
 174                                                 }
 175                                                 log.Println("GetUsersInChannel:", err)
 176                                                 fd.Close()
 177                                                 continue
 178                                         }
 179                                         if DebugFd != nil {
 180                                                 spew.Fdump(DebugFd, users)
 181                                         }
 182                                         for _, u := range users {
 183                                                 fmt.Fprintf(fd, "%s\n", u.Username)
 184                                         }
 185                                         if len(users) < mmc.PerPage {
 186                                                 break
 187                                         }
 188                                 }
 189                                 fd.Close()
 190                         }
 191                 }(ch)
 192
 193                 pth = path.Join(pth, "in")
 194                 mkFifo(pth)
 195                 go func(ch *model.Channel) {
 196                         for {
 197                                 fd, err := os.OpenFile(pth, os.O_RDONLY, os.FileMode(0666))
 198                                 if err != nil {
 199                                         continue
 200                                 }
 201                                 data, err := io.ReadAll(fd)
 202                                 fd.Close()
 203                                 if err != nil {
 204                                         continue
 205                                 }
 206                                 if _, err = makePost(c, ch.Id, string(data)); err != nil {
 207                                         log.Println("makePost:", err)
 208                                 }
 209                         }
 210                 }(ch)
 211         }
 212
 213         Users, err := mmc.GetUsers(c, DebugFd)
 214         if err != nil {
 215                 log.Fatalln(err)
 216         }
 217
 218         UsersDC := make(map[string]*model.Channel, len(Users))
 219         for _, u := range Users {
 220                 pth := path.Join("users", strings.ReplaceAll(u.Username, ".", "_"))
 221                 os.MkdirAll(pth, 0777)
 222                 rewriteIfChanged(
 223                         path.Join(pth, "name"),
 224                         fmt.Sprintf("%s %s\n", u.FirstName, u.LastName),
 225                 )
 226                 rewriteIfChanged(path.Join(pth, "email"), u.Email+"\n")
 227                 rewriteIfChanged(path.Join(pth, "id"), u.Id+"\n")
 228                 if _, err := os.Stat(path.Join(pth, mmc.OutRec)); err != nil &&
 229                         errors.Is(err, fs.ErrNotExist) {
 230                         if _, err = os.OpenFile(
 231                                 path.Join(pth, mmc.OutRec), os.O_WRONLY|os.O_CREATE, 0o666,
 232                         ); err != nil {
 233                                 log.Fatalln(err)
 234                         }
 235                 }
 236
 237                 if fi, err := os.Stat(path.Join(pth, mmc.OutRec)); err == nil && fi.Size() > 0 {
 238                         time.Sleep(mmc.SleepTime)
 239                         dc, resp, err := c.CreateDirectChannel(me.Id, u.Id)
 240                         if err != nil {
 241                                 if DebugFd != nil {
 242                                         spew.Fdump(DebugFd, resp)
 243                                 }
 244                                 log.Println("CreateDirectChannel:", err)
 245                                 continue
 246                         }
 247                         if DebugFd != nil {
 248                                 spew.Fdump(DebugFd, dc)
 249                         }
 250                         UsersDC[u.Id] = dc
 251                         updateQueue = append(updateQueue, pth, dc.Id)
 252                 }
 253
 254                 statusPth := path.Join(pth, "status")
 255                 mkFifo(statusPth)
 256                 go func(u *model.User) {
 257                         for {
 258                                 time.Sleep(mmc.SleepTime)
 259                                 fd, err := os.OpenFile(
 260                                         statusPth, os.O_WRONLY|os.O_APPEND, os.FileMode(0666),
 261                                 )
 262                                 if err != nil {
 263                                         log.Println("OpenFile:", statusPth, err)
 264                                         continue
 265                                 }
 266                                 status, resp, err := c.GetUserStatus(u.Id, "")
 267                                 if err != nil {
 268                                         if DebugFd != nil {
 269                                                 spew.Fdump(DebugFd, resp)
 270                                         }
 271                                         log.Println("GetUserStatus:", err)
 272                                         fd.Close()
 273                                         continue
 274                                 }
 275                                 if DebugFd != nil {
 276                                         spew.Fdump(DebugFd, status)
 277                                 }
 278                                 fmt.Fprintf(fd, "%s\n", status.Status)
 279                                 fd.Close()
 280                         }
 281                 }(u)
 282
 283                 pth = path.Join(pth, "in")
 284                 mkFifo(pth)
 285                 go func(u *model.User) {
 286                         var dc *model.Channel
 287                         for {
 288                                 fd, err := os.OpenFile(pth, os.O_RDONLY, os.FileMode(0666))
 289                                 if err != nil {
 290                                         continue
 291                                 }
 292                                 data, err := io.ReadAll(fd)
 293                                 fd.Close()
 294                                 if err != nil {
 295                                         continue
 296                                 }
 297                                 dc = UsersDC[u.Id]
 298                                 if dc == nil {
 299                                         dc, resp, err = c.CreateDirectChannel(me.Id, u.Id)
 300                                         if err != nil {
 301                                                 if DebugFd != nil {
 302                                                         spew.Fdump(DebugFd, resp)
 303                                                 }
 304                                                 log.Println("CreateDirectChannel:", err)
 305                                                 continue
 306                                         }
 307                                         UsersDC[u.Id] = dc
 308                                         if DebugFd != nil {
 309                                                 spew.Fdump(DebugFd, dc)
 310                                         }
 311                                 }
 312                                 if _, err = makePost(c, dc.Id, string(data)); err != nil {
 313                                         log.Println("makePost:", err)
 314                                 }
 315                         }
 316                 }(u)
 317         }
 318
 319         UserStatus := make(map[string]string)
 320         var UserStatusM sync.RWMutex
 321         go func() {
 322                 pth := path.Join("users", "status")
 323                 mkFifo(pth)
 324                 for {
 325                         time.Sleep(mmc.SleepTime)
 326                         fd, err := os.OpenFile(pth, os.O_WRONLY|os.O_APPEND, os.FileMode(0666))
 327                         if err != nil {
 328                                 log.Println("OpenFile:", pth, err)
 329                                 continue
 330                         }
 331                         agg := make(map[string][]string)
 332                         UserStatusM.RLock()
 333                         for name, status := range UserStatus {
 334                                 agg[status] = append(agg[status], name)
 335                         }
 336                         UserStatusM.RUnlock()
 337                         statuses := make([]string, 0, len(agg))
 338                         for status := range agg {
 339                                 sort.Strings(agg[status])
 340                                 statuses = append(statuses, status)
 341                         }
 342                         sort.Strings(statuses)
 343                         for _, status := range statuses {
 344                                 fmt.Fprintln(fd, status+":", strings.Join(agg[status], " "))
 345                         }
 346                         fd.Close()
 347                 }
 348         }()
 349
 350         log.Println("syncing", len(updateQueue)/2, "rooms")
 351         for len(updateQueue) > 0 {
 352                 err := updatePosts(c, Users, updateQueue[0], updateQueue[1])
 353                 if err != nil {
 354                         log.Println("updatePosts:", err)
 355                 }
 356                 updateQueue = updateQueue[2:]
 357         }
 358         log.Println("sync done")
 359         if *notifyCmd != "" {
 360                 exec.Command(*notifyCmd, "sync done").Run()
 361         }
 362
 363         go func() {
 364                 os.MkdirAll("file", 0777)
 365                 pthGet := path.Join("file", "get")
 366                 mkFifo(pthGet)
 367                 pthOut := path.Join("file", "out")
 368                 mkFifo(pthOut)
 369                 for {
 370                         time.Sleep(mmc.SleepTime)
 371                         fd, err := os.OpenFile(pthGet, os.O_RDONLY, os.FileMode(0666))
 372                         if err != nil {
 373                                 continue
 374                         }
 375                         data, err := io.ReadAll(fd)
 376                         fd.Close()
 377                         if err != nil {
 378                                 continue
 379                         }
 380                         fileId := strings.TrimRight(string(data), " \n")
 381                         if len(fileId) == 0 {
 382                                 continue
 383                         }
 384                         fi, resp, err := c.GetFileInfo(fileId)
 385                         if DebugFd != nil {
 386                                 spew.Fdump(DebugFd, fi, resp)
 387                         }
 388                         if err != nil {
 389                                 log.Println(err)
 390                                 continue
 391                         }
 392                         if fi == nil {
 393                                 fmt.Println(resp)
 394                                 continue
 395                         }
 396                         data, resp, err = c.GetFile(fileId)
 397                         if err != nil {
 398                                 if DebugFd != nil {
 399                                         spew.Fdump(DebugFd, resp)
 400                                 }
 401                                 log.Println(err)
 402                                 continue
 403                         }
 404                         fd, err = os.OpenFile(
 405                                 pthOut, os.O_WRONLY|os.O_APPEND, os.FileMode(0666),
 406                         )
 407                         if err != nil {
 408                                 log.Println(err)
 409                                 continue
 410                         }
 411                         w := tar.NewWriter(fd)
 412                         if err = w.WriteHeader(&tar.Header{
 413                                 Format:   tar.FormatPAX,
 414                                 Typeflag: tar.TypeReg,
 415                                 Name:     fi.Name,
 416                                 Size:     int64(len(data)),
 417                                 Mode:     0o666,
 418                                 ModTime:  time.Unix(fi.CreateAt/1000, 0),
 419                                 PAXRecords: map[string]string{
 420                                         "MM.FileId":   fi.Id,
 421                                         "MM.MIMEType": fi.MimeType,
 422                                 },
 423                         }); err != nil {
 424                                 log.Println(err)
 425                                 fd.Close()
 426                                 continue
 427                         }
 428                         if _, err = io.Copy(w, bytes.NewReader(data)); err != nil {
 429                                 log.Println(err)
 430                                 fd.Close()
 431                                 continue
 432                         }
 433                         err = w.Close()
 434                         fd.Close()
 435                         if err != nil {
 436                                 log.Println(err)
 437                         }
 438                 }
 439         }()
 440
 441         needsShutdown := make(chan os.Signal)
 442         wc, err := model.NewWebSocketClient4("wss://"+*entrypoint, c.AuthToken)
 443         if err != nil {
 444                 log.Fatalln(err)
 445         }
 446         go func() {
 447                 wc.Listen()
 448                 wc.GetStatuses()
 449                 t := time.NewTicker(time.Minute)
 450                 for {
 451                         select {
 452                         case <-t.C:
 453                                 if wc.ListenError != nil {
 454                                         log.Println("ListenError:", wc.ListenError)
 455                                         needsShutdown <- syscall.SIGTERM
 456                                         return
 457                                 }
 458                                 wc.GetStatuses()
 459                                 if *heartbeatCh != "" {
 460                                         if _, _, err = c.ViewChannel(
 461                                                 me.Id,
 462                                                 &model.ChannelView{ChannelId: Chans[*heartbeatCh].Id},
 463                                         ); err != nil {
 464                                                 log.Println("ChannelView:", err)
 465                                         }
 466                                 }
 467                         case <-wc.PingTimeoutChannel:
 468                                 log.Println("PING timeout")
 469                                 needsShutdown <- syscall.SIGTERM
 470                                 return
 471                         case e := <-wc.EventChannel:
 472                                 if e == nil || !e.IsValid() {
 473                                         continue
 474                                 }
 475                                 if DebugFd != nil {
 476                                         spew.Fdump(DebugFd, e)
 477                                 }
 478                                 data := e.GetData()
 479                                 var user *model.User
 480                                 if userId, ok := data["user_id"]; ok && userId.(string) != "" {
 481                                         user = Users[userId.(string)]
 482                                         if user == nil {
 483                                                 log.Println("unknown user for event:", e)
 484                                                 continue
 485                                         }
 486                                 }
 487                                 switch eventType := e.EventType(); eventType {
 488                                 case model.WebsocketEventTyping:
 489                                         if *notifyCmd != "" {
 490                                                 exec.Command(*notifyCmd, "typing: "+user.Username).Run()
 491                                         }
 492                                 case model.WebsocketEventPostEdited,
 493                                         model.WebsocketEventPostDeleted,
 494                                         model.WebsocketEventPosted:
 495                                         chName, ok := data["channel_name"].(string)
 496                                         if !ok {
 497                                                 continue
 498                                         }
 499                                         var post model.Post
 500                                         if err = json.NewDecoder(
 501                                                 strings.NewReader(data["post"].(string)),
 502                                         ).Decode(&post); err != nil {
 503                                                 log.Fatalln(err)
 504                                         }
 505                                         var recipient string
 506                                         switch model.ChannelType(data["channel_type"].(string)) {
 507                                         case model.ChannelTypeDirect:
 508                                                 userId := strings.TrimPrefix(chName, me.Id+"__")
 509                                                 userId = strings.TrimSuffix(userId, "__"+me.Id)
 510                                                 user := Users[userId]
 511                                                 if user == nil {
 512                                                         log.Println("unknown user:", userId)
 513                                                         continue
 514                                                 }
 515                                                 recipient = path.Join("users", user.Username)
 516                                         case model.ChannelTypeOpen:
 517                                                 fallthrough
 518                                         case model.ChannelTypePrivate:
 519                                                 fallthrough
 520                                         case model.ChannelTypeGroup:
 521                                                 recipient = path.Join("chans", chName)
 522                                         }
 523                                         if err = writePosts(
 524                                                 recipient, Users, []mmc.Post{{P: &post, E: eventType}},
 525                                         ); err != nil {
 526                                                 log.Fatalln(err)
 527                                         }
 528                                 case model.WebsocketEventStatusChange:
 529                                         status := data["status"].(string)
 530                                         UserStatusM.Lock()
 531                                         UserStatus[user.Username] = status
 532                                         UserStatusM.Unlock()
 533                                         if *notifyCmd != "" {
 534                                                 exec.Command(*notifyCmd, fmt.Sprintf(
 535                                                         "status: %s -> %s", user.Username, status,
 536                                                 )).Run()
 537                                         }
 538                                 case model.WebsocketEventHello:
 539                                 case model.WebsocketEventChannelViewed:
 540                                 default:
 541                                         log.Println(e)
 542                                 }
 543                         case resp := <-wc.ResponseChannel:
 544                                 if resp == nil || !resp.IsValid() {
 545                                         continue
 546                                 }
 547                                 if DebugFd != nil {
 548                                         spew.Fdump(DebugFd, resp)
 549                                 }
 550                                 statuses := make(map[string]string)
 551                                 for userId, status := range resp.Data {
 552                                         status, ok := status.(string)
 553                                         if !ok {
 554                                                 continue
 555                                         }
 556                                         user := Users[userId]
 557                                         if user == nil {
 558                                                 continue
 559                                         }
 560                                         statuses[user.Username] = status
 561                                 }
 562                                 if len(statuses) > 0 {
 563                                         UserStatusM.Lock()
 564                                         for u := range UserStatus {
 565                                                 delete(UserStatus, u)
 566                                         }
 567                                         for u, status := range statuses {
 568                                                 UserStatus[u] = status
 569                                         }
 570                                         UserStatusM.Unlock()
 571                                 }
 572                         }
 573                 }
 574         }()
 575
 576         signal.Notify(needsShutdown, syscall.SIGTERM, syscall.SIGINT)
 577         <-needsShutdown
 578         c.Logout()
 579         log.Println("finished")
 580 }