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 var (
  45         Newwin   = flag.String("newwin", "cmd/newwin", "Path to newwin command")
  46         DebugFd  *os.File
  47         UmaskCur int
  48 )
  49
  50 func rewriteIfChanged(fn string, data string) {
  51         if their, err := os.ReadFile(fn); err != nil ||
  52                 !bytes.Equal([]byte(data), their) {
  53                 if err = os.WriteFile(fn, []byte(data), 0o666); err != nil {
  54                         log.Fatalln(err)
  55                 }
  56         }
  57 }
  58
  59 func mkFifo(pth string) {
  60         if _, err := os.Stat(pth); err == nil {
  61                 return
  62         }
  63         if err := syscall.Mkfifo(pth, 0666); err != nil {
  64                 log.Fatalln(err)
  65         }
  66 }
  67
  68 func main() {
  69         entrypoint := flag.String("entrypoint", mmc.GetEntrypoint(), "Entrypoint")
  70         notifyCmd := flag.String("notify", "cmd/notify", "Path to notification handler")
  71         heartbeatCh := flag.String("heartbeat-ch", "town-square", "Channel for heartbeating")
  72         flag.Parse()
  73         log.SetFlags(log.Lshortfile)
  74         log.SetOutput(os.Stdout)
  75         UmaskCur = syscall.Umask(0)
  76         syscall.Umask(UmaskCur)
  77
  78         mkFifo("debug")
  79         var err error
  80         DebugFd, err = os.OpenFile(
  81                 "debug", os.O_WRONLY|os.O_APPEND, os.FileMode(0666),
  82         )
  83         if err != nil {
  84                 log.Fatalln(err)
  85         }
  86         defer DebugFd.Close()
  87
  88         login, password := mmc.FindInNetrc(*entrypoint)
  89         if login == "" || password == "" {
  90                 log.Fatalln("no credentials found for:", *entrypoint)
  91         }
  92         c := model.NewAPIv4Client("https://" + *entrypoint)
  93         c.Login(login, password)
  94         me, resp, err := c.GetMe("")
  95         if err != nil {
  96                 if DebugFd != nil {
  97                         spew.Fdump(DebugFd, resp)
  98                 }
  99                 log.Fatalln(err)
 100         }
 101         if DebugFd != nil {
 102                 spew.Fdump(DebugFd, me)
 103         }
 104         log.Println("logged in")
 105
 106         time.Sleep(mmc.SleepTime)
 107         teams, resp, err := c.GetTeamsForUser(me.Id, "")
 108         if err != nil {
 109                 if DebugFd != nil {
 110                         spew.Fdump(DebugFd, resp)
 111                 }
 112                 log.Fatalln(err)
 113         }
 114         if DebugFd != nil {
 115                 spew.Fdump(DebugFd, teams)
 116         }
 117         Team := teams[0]
 118
 119         var updateQueue []string
 120         Chans := make(map[string]*model.Channel)
 121         time.Sleep(mmc.SleepTime)
 122         page, resp, err := c.GetChannelsForTeamForUser(Team.Id, me.Id, false, "")
 123         if err != nil {
 124                 if DebugFd != nil {
 125                         spew.Fdump(DebugFd, resp)
 126                 }
 127                 log.Fatalln(err)
 128         }
 129         if DebugFd != nil {
 130                 spew.Fdump(DebugFd, page)
 131         }
 132         for _, ch := range page {
 133                 if ch.Type == "D" {
 134                         continue
 135                 }
 136                 Chans[ch.Name] = ch
 137                 pth := path.Join("chans", strings.ReplaceAll(ch.Name, ".", "_"))
 138                 updateQueue = append(updateQueue, pth, ch.Id)
 139                 os.MkdirAll(pth, 0777)
 140                 rewriteIfChanged(path.Join(pth, "id"), ch.Id+"\n")
 141                 rewriteIfChanged(path.Join(pth, "info"), fmt.Sprintf(
 142                         "%s\n%s\n%s\n",
 143                         ch.DisplayName,
 144                         ch.Header,
 145                         ch.Purpose,
 146                 ))
 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
 156                 usersPth := path.Join(pth, "users")
 157                 mkFifo(usersPth)
 158                 go func(ch *model.Channel) {
 159                         for {
 160                                 time.Sleep(mmc.SleepTime)
 161                                 fd, err := os.OpenFile(
 162                                         usersPth, os.O_WRONLY|os.O_APPEND, os.FileMode(0666),
 163                                 )
 164                                 if err != nil {
 165                                         log.Println("OpenFile:", usersPth, err)
 166                                         continue
 167                                 }
 168                                 for n := 0; ; n++ {
 169                                         users, resp, err := c.GetUsersInChannel(ch.Id, n, mmc.PerPage, "")
 170                                         if err != nil {
 171                                                 if DebugFd != nil {
 172                                                         spew.Fdump(DebugFd, resp)
 173                                                 }
 174                                                 log.Println("GetUsersInChannel:", err)
 175                                                 fd.Close()
 176                                                 continue
 177                                         }
 178                                         if DebugFd != nil {
 179                                                 spew.Fdump(DebugFd, users)
 180                                         }
 181                                         for _, u := range users {
 182                                                 fmt.Fprintf(fd, "%s\n", u.Username)
 183                                         }
 184                                         if len(users) < mmc.PerPage {
 185                                                 break
 186                                         }
 187                                 }
 188                                 fd.Close()
 189                         }
 190                 }(ch)
 191
 192                 pth = path.Join(pth, "in")
 193                 mkFifo(pth)
 194                 go func(ch *model.Channel) {
 195                         for {
 196                                 fd, err := os.OpenFile(pth, os.O_RDONLY, os.FileMode(0666))
 197                                 if err != nil {
 198                                         continue
 199                                 }
 200                                 data, err := io.ReadAll(fd)
 201                                 fd.Close()
 202                                 if err != nil {
 203                                         continue
 204                                 }
 205                                 if _, err = makePost(c, ch.Id, string(data)); err != nil {
 206                                         log.Println("makePost:", err)
 207                                 }
 208                         }
 209                 }(ch)
 210         }
 211
 212         Users, err := mmc.GetUsers(c, DebugFd)
 213         if err != nil {
 214                 log.Fatalln(err)
 215         }
 216
 217         UsersDC := make(map[string]*model.Channel, len(Users))
 218         for _, u := range Users {
 219                 pth := path.Join("users", strings.ReplaceAll(u.Username, ".", "_"))
 220                 os.MkdirAll(pth, 0777)
 221                 rewriteIfChanged(
 222                         path.Join(pth, "name"),
 223                         fmt.Sprintf("%s %s\n", u.FirstName, u.LastName),
 224                 )
 225                 rewriteIfChanged(path.Join(pth, "email"), u.Email+"\n")
 226                 rewriteIfChanged(path.Join(pth, "id"), u.Id+"\n")
 227                 if _, err := os.Stat(path.Join(pth, mmc.OutRec)); err != nil &&
 228                         errors.Is(err, fs.ErrNotExist) {
 229                         if _, err = os.OpenFile(
 230                                 path.Join(pth, mmc.OutRec), os.O_WRONLY|os.O_CREATE, 0o666,
 231                         ); err != nil {
 232                                 log.Fatalln(err)
 233                         }
 234                 }
 235
 236                 if fi, err := os.Stat(path.Join(pth, mmc.OutRec)); err == nil && fi.Size() > 0 {
 237                         time.Sleep(mmc.SleepTime)
 238                         dc, resp, err := c.CreateDirectChannel(me.Id, u.Id)
 239                         if err != nil {
 240                                 if DebugFd != nil {
 241                                         spew.Fdump(DebugFd, resp)
 242                                 }
 243                                 log.Println("CreateDirectChannel:", err)
 244                                 continue
 245                         }
 246                         if DebugFd != nil {
 247                                 spew.Fdump(DebugFd, dc)
 248                         }
 249                         UsersDC[u.Id] = dc
 250                         updateQueue = append(updateQueue, pth, dc.Id)
 251                 }
 252
 253                 statusPth := path.Join(pth, "status")
 254                 mkFifo(statusPth)
 255                 go func(u *model.User) {
 256                         for {
 257                                 time.Sleep(mmc.SleepTime)
 258                                 fd, err := os.OpenFile(
 259                                         statusPth, os.O_WRONLY|os.O_APPEND, os.FileMode(0666),
 260                                 )
 261                                 if err != nil {
 262                                         log.Println("OpenFile:", statusPth, err)
 263                                         continue
 264                                 }
 265                                 status, resp, err := c.GetUserStatus(u.Id, "")
 266                                 if err != nil {
 267                                         if DebugFd != nil {
 268                                                 spew.Fdump(DebugFd, resp)
 269                                         }
 270                                         log.Println("GetUserStatus:", err)
 271                                         fd.Close()
 272                                         continue
 273                                 }
 274                                 if DebugFd != nil {
 275                                         spew.Fdump(DebugFd, status)
 276                                 }
 277                                 fmt.Fprintf(fd, "%s\n", status.Status)
 278                                 fd.Close()
 279                         }
 280                 }(u)
 281
 282                 pth = path.Join(pth, "in")
 283                 mkFifo(pth)
 284                 go func(u *model.User) {
 285                         var dc *model.Channel
 286                         for {
 287                                 fd, err := os.OpenFile(pth, os.O_RDONLY, os.FileMode(0666))
 288                                 if err != nil {
 289                                         continue
 290                                 }
 291                                 data, err := io.ReadAll(fd)
 292                                 fd.Close()
 293                                 if err != nil {
 294                                         continue
 295                                 }
 296                                 dc = UsersDC[u.Id]
 297                                 if dc == nil {
 298                                         dc, resp, err = c.CreateDirectChannel(me.Id, u.Id)
 299                                         if err != nil {
 300                                                 if DebugFd != nil {
 301                                                         spew.Fdump(DebugFd, resp)
 302                                                 }
 303                                                 log.Println("CreateDirectChannel:", err)
 304                                                 continue
 305                                         }
 306                                         UsersDC[u.Id] = dc
 307                                         if DebugFd != nil {
 308                                                 spew.Fdump(DebugFd, dc)
 309                                         }
 310                                 }
 311                                 if _, err = makePost(c, dc.Id, string(data)); err != nil {
 312                                         log.Println("makePost:", err)
 313                                 }
 314                         }
 315                 }(u)
 316         }
 317
 318         UserStatus := make(map[string]string)
 319         var UserStatusM sync.RWMutex
 320         go func() {
 321                 pth := path.Join("users", "status")
 322                 mkFifo(pth)
 323                 for {
 324                         time.Sleep(mmc.SleepTime)
 325                         fd, err := os.OpenFile(pth, os.O_WRONLY|os.O_APPEND, os.FileMode(0666))
 326                         if err != nil {
 327                                 log.Println("OpenFile:", pth, err)
 328                                 continue
 329                         }
 330                         agg := make(map[string][]string)
 331                         UserStatusM.RLock()
 332                         for name, status := range UserStatus {
 333                                 agg[status] = append(agg[status], name)
 334                         }
 335                         UserStatusM.RUnlock()
 336                         statuses := make([]string, 0, len(agg))
 337                         for status := range agg {
 338                                 sort.Strings(agg[status])
 339                                 statuses = append(statuses, status)
 340                         }
 341                         sort.Strings(statuses)
 342                         for _, status := range statuses {
 343                                 fmt.Fprintln(fd, status+":", strings.Join(agg[status], " "))
 344                         }
 345                         fd.Close()
 346                 }
 347         }()
 348
 349         log.Println("syncing", len(updateQueue)/2, "rooms")
 350         for len(updateQueue) > 0 {
 351                 err := updatePosts(c, Users, updateQueue[0], updateQueue[1])
 352                 if err != nil {
 353                         log.Println("updatePosts:", err)
 354                 }
 355                 updateQueue = updateQueue[2:]
 356         }
 357         log.Println("sync done")
 358         if *notifyCmd != "" {
 359                 exec.Command(*notifyCmd, "sync done").Run()
 360         }
 361
 362         go func() {
 363                 os.MkdirAll("file", 0777)
 364                 pthGet := path.Join("file", "get")
 365                 mkFifo(pthGet)
 366                 pthOut := path.Join("file", "out")
 367                 mkFifo(pthOut)
 368                 for {
 369                         time.Sleep(mmc.SleepTime)
 370                         fd, err := os.OpenFile(pthGet, os.O_RDONLY, os.FileMode(0666))
 371                         if err != nil {
 372                                 continue
 373                         }
 374                         data, err := io.ReadAll(fd)
 375                         fd.Close()
 376                         if err != nil {
 377                                 continue
 378                         }
 379                         fileId := strings.TrimRight(string(data), " \n")
 380                         if len(fileId) == 0 {
 381                                 continue
 382                         }
 383                         fi, resp, err := c.GetFileInfo(fileId)
 384                         if DebugFd != nil {
 385                                 spew.Fdump(DebugFd, fi, resp)
 386                         }
 387                         if err != nil {
 388                                 log.Println(err)
 389                                 continue
 390                         }
 391                         if fi == nil {
 392                                 fmt.Println(resp)
 393                                 continue
 394                         }
 395                         data, resp, err = c.GetFile(fileId)
 396                         if err != nil {
 397                                 if DebugFd != nil {
 398                                         spew.Fdump(DebugFd, resp)
 399                                 }
 400                                 log.Println(err)
 401                                 continue
 402                         }
 403                         fd, err = os.OpenFile(
 404                                 pthOut, os.O_WRONLY|os.O_APPEND, os.FileMode(0666),
 405                         )
 406                         if err != nil {
 407                                 log.Println(err)
 408                                 continue
 409                         }
 410                         w := tar.NewWriter(fd)
 411                         if err = w.WriteHeader(&tar.Header{
 412                                 Format:   tar.FormatPAX,
 413                                 Typeflag: tar.TypeReg,
 414                                 Name:     fi.Name,
 415                                 Size:     int64(len(data)),
 416                                 Mode:     0o666,
 417                                 ModTime:  time.Unix(fi.CreateAt/1000, 0),
 418                                 PAXRecords: map[string]string{
 419                                         "MM.FileId":   fi.Id,
 420                                         "MM.MIMEType": fi.MimeType,
 421                                 },
 422                         }); err != nil {
 423                                 log.Println(err)
 424                                 fd.Close()
 425                                 continue
 426                         }
 427                         if _, err = io.Copy(w, bytes.NewReader(data)); err != nil {
 428                                 log.Println(err)
 429                                 fd.Close()
 430                                 continue
 431                         }
 432                         err = w.Close()
 433                         fd.Close()
 434                         if err != nil {
 435                                 log.Println(err)
 436                         }
 437                 }
 438         }()
 439
 440         needsShutdown := make(chan os.Signal)
 441         wc, err := model.NewWebSocketClient4("wss://"+*entrypoint, c.AuthToken)
 442         if err != nil {
 443                 log.Fatalln(err)
 444         }
 445         go func() {
 446                 wc.Listen()
 447                 wc.GetStatuses()
 448                 t := time.NewTicker(time.Minute)
 449                 for {
 450                         select {
 451                         case <-t.C:
 452                                 if wc.ListenError != nil {
 453                                         log.Println("ListenError:", wc.ListenError)
 454                                         needsShutdown <- syscall.SIGTERM
 455                                         return
 456                                 }
 457                                 wc.GetStatuses()
 458                                 if *heartbeatCh != "" {
 459                                         if _, _, err = c.ViewChannel(
 460                                                 me.Id,
 461                                                 &model.ChannelView{ChannelId: Chans[*heartbeatCh].Id},
 462                                         ); err != nil {
 463                                                 log.Println("ChannelView:", err)
 464                                         }
 465                                 }
 466                         case <-wc.PingTimeoutChannel:
 467                                 log.Println("PING timeout")
 468                                 needsShutdown <- syscall.SIGTERM
 469                                 return
 470                         case e := <-wc.EventChannel:
 471                                 if e == nil || !e.IsValid() {
 472                                         continue
 473                                 }
 474                                 if DebugFd != nil {
 475                                         spew.Fdump(DebugFd, e)
 476                                 }
 477                                 data := e.GetData()
 478                                 var user *model.User
 479                                 if userId, ok := data["user_id"]; ok && userId.(string) != "" {
 480                                         user = Users[userId.(string)]
 481                                         if user == nil {
 482                                                 log.Println("unknown user for event:", e)
 483                                                 continue
 484                                         }
 485                                 }
 486                                 switch eventType := e.EventType(); eventType {
 487                                 case model.WebsocketEventTyping:
 488                                         if *notifyCmd != "" {
 489                                                 exec.Command(*notifyCmd, "typing: "+user.Username).Run()
 490                                         }
 491                                 case model.WebsocketEventPostEdited,
 492                                         model.WebsocketEventPostDeleted,
 493                                         model.WebsocketEventPosted:
 494                                         chName, ok := data["channel_name"].(string)
 495                                         if !ok {
 496                                                 continue
 497                                         }
 498                                         var post model.Post
 499                                         if err = json.NewDecoder(
 500                                                 strings.NewReader(data["post"].(string)),
 501                                         ).Decode(&post); err != nil {
 502                                                 log.Fatalln(err)
 503                                         }
 504                                         var recipient string
 505                                         switch model.ChannelType(data["channel_type"].(string)) {
 506                                         case model.ChannelTypeDirect:
 507                                                 userId := strings.TrimPrefix(chName, me.Id+"__")
 508                                                 userId = strings.TrimSuffix(userId, "__"+me.Id)
 509                                                 user := Users[userId]
 510                                                 if user == nil {
 511                                                         log.Println("unknown user:", userId)
 512                                                         continue
 513                                                 }
 514                                                 recipient = path.Join("users", user.Username)
 515                                         case model.ChannelTypeOpen:
 516                                                 fallthrough
 517                                         case model.ChannelTypePrivate:
 518                                                 fallthrough
 519                                         case model.ChannelTypeGroup:
 520                                                 recipient = path.Join("chans", chName)
 521                                         }
 522                                         if err = writePosts(
 523                                                 recipient, Users, []mmc.Post{{P: &post, E: eventType}},
 524                                         ); err != nil {
 525                                                 log.Fatalln(err)
 526                                         }
 527                                 case model.WebsocketEventStatusChange:
 528                                         status := data["status"].(string)
 529                                         UserStatusM.Lock()
 530                                         UserStatus[user.Username] = status
 531                                         UserStatusM.Unlock()
 532                                         if *notifyCmd != "" {
 533                                                 exec.Command(*notifyCmd, fmt.Sprintf(
 534                                                         "status: %s -> %s", user.Username, status,
 535                                                 )).Run()
 536                                         }
 537                                 case model.WebsocketEventHello:
 538                                 case model.WebsocketEventChannelViewed:
 539                                 default:
 540                                         log.Println(e)
 541                                 }
 542                         case resp := <-wc.ResponseChannel:
 543                                 if resp == nil || !resp.IsValid() {
 544                                         continue
 545                                 }
 546                                 if DebugFd != nil {
 547                                         spew.Fdump(DebugFd, resp)
 548                                 }
 549                                 statuses := make(map[string]string)
 550                                 for userId, status := range resp.Data {
 551                                         status, ok := status.(string)
 552                                         if !ok {
 553                                                 continue
 554                                         }
 555                                         user := Users[userId]
 556                                         if user == nil {
 557                                                 continue
 558                                         }
 559                                         statuses[user.Username] = status
 560                                 }
 561                                 if len(statuses) > 0 {
 562                                         UserStatusM.Lock()
 563                                         for u := range UserStatus {
 564                                                 delete(UserStatus, u)
 565                                         }
 566                                         for u, status := range statuses {
 567                                                 UserStatus[u] = status
 568                                         }
 569                                         UserStatusM.Unlock()
 570                                 }
 571                         }
 572                 }
 573         }()
 574
 575         signal.Notify(needsShutdown, syscall.SIGTERM, syscall.SIGINT)
 576         <-needsShutdown
 577         c.Logout()
 578         log.Println("finished")
 579 }