package mattermost
import (
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
_ "os"
"strings"
"sync"
"time"
"github.com/42wim/matterbridge/matterclient"
"github.com/mattermost/mattermost-server/v5/model"
log "github.com/sirupsen/logrus"
. "git.deuxfleurs.fr/Deuxfleurs/easybridge/connector"
)
// User id format: nickname@server
// Room id format: room_name@team@server
type Mattermost struct {
handler Handler
server string
username string
teams map[string]bool
initial_members int // How many room members (maximum) to load when first joining a channel
initial_backlog int // How many previous messages (maximum) to load when first joining a channel
conn *matterclient.MMClient
handlerStopChan chan struct{}
caches mmCaches
}
type mmCaches struct {
sync.Mutex
mmusers map[string]string // map mm username to mm user id
sentjoined map[string]bool // map username/room name to bool
displayname map[UserID]string // map username to last displayname
initsynced map[string]bool // chans for which init sync has been done
}
func (mm *Mattermost) SetHandler(h Handler) {
mm.handler = h
}
func (mm *Mattermost) Protocol() string {
return MATTERMOST_PROTOCOL
}
func (mm *Mattermost) Configure(c Configuration) error {
if mm.conn != nil {
mm.Close()
}
// Reinitialize shared data structures
mm.handlerStopChan = make(chan struct{})
mm.caches.mmusers = make(map[string]string)
mm.caches.sentjoined = make(map[string]bool)
mm.caches.displayname = make(map[UserID]string)
mm.caches.initsynced = make(map[string]bool)
// Read config
var err error
mm.server, err = c.GetString("server")
if err != nil {
return err
}
mm.username, err = c.GetString("username")
if err != nil {
return err
}
mm.initial_members, err = c.GetInt("initial_members", 100)
if err != nil {
return err
}
mm.initial_backlog, err = c.GetInt("initial_backlog", 1000)
if err != nil {
return err
}
teams, err := c.GetString("teams")
if err != nil {
return err
}
mm.teams = map[string]bool{}
anyteam := ""
for _, team := range strings.Split(teams, ",") {
anyteam = strings.TrimSpace(team)
mm.teams[anyteam] = true
}
notls, err := c.GetBool("no_tls", false)
if err != nil {
return err
}
password, _ := c.GetString("password", "")
token, _ := c.GetString("token", "")
if token != "" {
password = "token=" + token
}
// Try to log in
mm.conn = matterclient.New(mm.username, password, anyteam, mm.server)
mm.conn.Credentials.NoTLS = notls
err = mm.conn.Login()
if err != nil {
return err
}
// Try to start listening for messages
// Everytime the listener reconnects, mm.handleConnected does a sync of room status
mm.conn.OnWsConnect = mm.handleConnected
go mm.conn.WsReceiver()
go mm.conn.StatusLoop()
go mm.handleLoop(mm.conn.MessageChan, mm.handlerStopChan)
return nil
}
func (mm *Mattermost) User() UserID {
return UserID(mm.username + "@" + mm.server)
}
func (mm *Mattermost) getTeamIdByName(name string) string {
for _, team := range mm.conn.OtherTeams {
if team.Team.Name == name {
return team.Id
}
}
return ""
}
func (mm *Mattermost) checkRoomId(id RoomID) (string, error) {
x := strings.Split(string(id), "@")
if len(x) == 1 {
return "", fmt.Errorf("Please write whole room ID with team and server: %s@<team>@%s", id, mm.server)
}
if len(x) == 2 {
return x[0], nil
}
if len(x) != 3 || x[2] != mm.server {
return "", fmt.Errorf("Invalid room ID: %s", id)
}
team_id := mm.getTeamIdByName(x[1])
if team_id == "" {
return "", fmt.Errorf("Team not found: %s", id)
}
ch_id := mm.conn.GetChannelId(x[0], team_id)
if ch_id == "" {
return "", fmt.Errorf("Channel not found: %s", id)
}
return ch_id, nil
}
func (mm *Mattermost) reverseRoomId(id string) (bool, RoomID) {
team := mm.conn.GetChannelTeamId(id)
if team == "" {
return true, RoomID(fmt.Sprintf("%s@%s", id, mm.server))
} else {
teamName := mm.conn.GetTeamName(team)
if u, ok := mm.teams[teamName]; ok && u {
name := mm.conn.GetChannelName(id)
return true, RoomID(fmt.Sprintf("%s@%s@%s", name, teamName, mm.server))
} else {
return false, ""
}
}
}
func (mm *Mattermost) checkUserId(id UserID) (string, error) {
x := strings.Split(string(id), "@")
if len(x) == 1 {
return "", fmt.Errorf("Please write whole user ID with server: %s@%s", id, mm.server)
}
if len(x) != 2 || x[1] != mm.server {
return "", fmt.Errorf("Invalid user ID: %s", id)
}
mm.caches.Lock()
defer mm.caches.Unlock()
if user_id, ok := mm.caches.mmusers[x[0]]; ok {
return user_id, nil
}
u, resp := mm.conn.Client.GetUserByUsername(x[0], "")
if u == nil || resp.Error != nil {
return "", fmt.Errorf("Not found: %s (%s)", x[0], resp.Error)
}
mm.caches.mmusers[x[0]] = u.Id
return u.Id, nil
}
func (mm *Mattermost) SetUserInfo(info *UserInfo) error {
return fmt.Errorf("Not implemented")
}
func (mm *Mattermost) SetRoomInfo(roomId RoomID, info *RoomInfo) error {
ch, err := mm.checkRoomId(roomId)
if err != nil {
return err
}
if info.Topic != "" {
mm.conn.UpdateChannelHeader(ch, info.Topic)
}
if info.Picture.MediaObject != nil {
err = fmt.Errorf("Not supported: channel picture on mattermost")
}
if info.Name != "" {
err = fmt.Errorf("Not supported: channel name on mattermost")
}
return err
}
func (mm *Mattermost) Join(roomId RoomID) error {
ch, err := mm.checkRoomId(roomId)
if err != nil {
return err
}
return mm.conn.JoinChannel(ch)
}
func (mm *Mattermost) Invite(userId UserID, roomId RoomID) error {
if roomId == "" {
_, err := mm.checkUserId(userId)
return err
}
return fmt.Errorf("Not supported: invite on mattermost")
}
func (mm *Mattermost) Leave(roomId RoomID) {
// Not supported? TODO
}
func (mm *Mattermost) SearchForUsers(query string) ([]UserSearchResult, error) {
query = strings.ToLower(query)
ret := []UserSearchResult{}
for _, user := range mm.conn.Users {
if strings.Contains(strings.ToLower(user.Username), query) ||
strings.Contains(strings.ToLower(user.Nickname), query) ||
strings.Contains(strings.ToLower(user.GetDisplayName(model.SHOW_NICKNAME_FULLNAME)), query) {
ret = append(ret, UserSearchResult{
ID: UserID(fmt.Sprintf("%s@%s", user.Username, mm.server)),
DisplayName: user.GetDisplayName(model.SHOW_NICKNAME_FULLNAME),
})
}
}
return ret, nil
}
func (mm *Mattermost) Send(event *Event) (string, error) {
post := &model.Post{
Message: event.Text,
}
if event.Type == EVENT_ACTION {
post.Type = "me"
}
if event.Room != "" {
ch, err := mm.checkRoomId(event.Room)
if err != nil {
return "", err
}
post.ChannelId = ch
} else if event.Recipient != "" {
ui, err := mm.checkUserId(event.Recipient)
if err != nil {
return "", err
}
_, resp := mm.conn.Client.CreateDirectChannel(mm.conn.User.Id, ui)
if resp.Error != nil {
return "", resp.Error
}
channelName := model.GetDMNameFromIds(ui, mm.conn.User.Id)
err = mm.conn.UpdateChannels()
if err != nil {
return "", err
}
post.ChannelId = mm.conn.GetChannelId(channelName, "")
} else {
return "", fmt.Errorf("Invalid target")
}
if event.Attachments != nil {
post.FileIds = []string{}
for _, file := range event.Attachments {
rdr, err := file.Read()
if err != nil {
return "", err
}
defer rdr.Close()
data, err := ioutil.ReadAll(rdr)
if err != nil {
return "", err
}
up_file, err := mm.conn.UploadFile(data, post.ChannelId, file.Filename())
if err != nil {
log.Warnf("UploadFile error: %s", err)
return "", err
}
post.FileIds = append(post.FileIds, up_file)
}
}
created_post, resp := mm.conn.Client.CreatePost(post)
if resp.Error != nil {
log.Warnf("CreatePost error: %s", resp.Error)
return "", resp.Error
}
return created_post.Id, nil
}
func (mm *Mattermost) UserCommand(cm string) {
mm.handler.SystemMessage("Command not supported.")
}
func (mm *Mattermost) Close() {
if mm.conn != nil {
mm.conn.WsQuit = true
}
if mm.handlerStopChan != nil {
close(mm.handlerStopChan)
mm.handlerStopChan = nil
}
}
func (mm *Mattermost) handleConnected() {
mm.handler.SystemMessage(fmt.Sprintf("(Re-)connected to mattermost (%s@%s), doing channel sync", mm.username, mm.server))
// Initial channel sync
chans := mm.conn.GetChannels()
doneCh := make(map[string]bool)
for _, ch := range chans {
if _, ok := doneCh[ch.Id]; !ok {
doneCh[ch.Id] = true
go mm.syncChannel(ch)
}
}
}
func (mm *Mattermost) syncChannel(ch *model.Channel) {
// The first time we see a chan, sync everything (member list, names, profile pictures)
must_initsync := func() bool {
mm.caches.Lock()
defer mm.caches.Unlock()
if x, ok := mm.caches.initsynced[ch.Id]; ok && x {
return false
}
mm.caches.initsynced[ch.Id] = true
return true
}()
if must_initsync {
mm.initSyncChannel(ch)
}
// The following times, only sync missing messages
mm.backlogChannel(ch)
}
func (mm *Mattermost) initSyncChannel(ch *model.Channel) {
if len(strings.Split(ch.Name, "__")) == 2 {
// DM channel
// Update remote user info
users := strings.Split(ch.Name, "__")
for _, uid := range users {
if uid != mm.conn.User.Id {
user := mm.conn.GetUser(uid)
if user != nil {
mm.updateUserInfo(user)
}
}
}
} else {
interested, id := mm.reverseRoomId(ch.Id)
if !interested {
// Skip channels that are not in teams we want to bridge
return
}
mm.handler.Joined(id)
// Update room info
room_info := &RoomInfo{
Name: ch.DisplayName,
Topic: ch.Header,
}
for _, t := range mm.conn.OtherTeams {
if t.Id == ch.TeamId {
if t.Team.DisplayName != "" {
room_info.Name = t.Team.DisplayName + " / " + room_info.Name
} else {
room_info.Name = t.Team.Name + " / " + room_info.Name
}
if t.Team.LastTeamIconUpdate > 0 {
room_info.Picture = SMediaObject{&LazyBlobMediaObject{
ObjectFilename: fmt.Sprintf("%s-%d",
t.Team.Name,
t.Team.LastTeamIconUpdate),
GetFn: func(o *LazyBlobMediaObject) error {
team_img, resp := mm.conn.Client.GetTeamIcon(t.Id, "")
if resp.Error != nil {
log.Warnf("Could not get team image: %s", resp.Error.Error())
return resp.Error
}
o.ObjectData = team_img
o.ObjectMimetype = http.DetectContentType(team_img)
return nil
},
}}
}
break
}
}
mm.handler.RoomInfoUpdated(id, UserID(""), room_info)
// Update member list
// TODO (when this will be slow, i.e. hundreds of members): do only a diff
members, resp := mm.conn.Client.GetChannelMembers(ch.Id, 0, mm.initial_members, "")
if resp.Error == nil {
for _, mem := range *members {
if mem.UserId == mm.conn.User.Id {
continue
}
user := mm.conn.GetUser(mem.UserId)
if user != nil {
mm.ensureJoined(user, id)
mm.updateUserInfo(user)
} else {
log.Warnf("Could not find joined user: %s", mem.UserId)
}
}
} else {
log.Warnf("Could not get channel members: %s", resp.Error.Error())
}
}
}
func (mm *Mattermost) backlogChannel(ch *model.Channel) {
// Read backlog
last_seen_post := mm.handler.CacheGet(fmt.Sprintf("last_seen_%s", ch.Id))
if last_seen_post != "" {
const NUM_PER_PAGE = 100
page := 0
backlogs := []*model.PostList{}
for {
backlog, resp := mm.conn.Client.GetPostsAfter(ch.Id, last_seen_post, page, NUM_PER_PAGE, "")
if resp.Error == nil {
backlogs = append(backlogs, backlog)
if len(backlog.Order) == NUM_PER_PAGE {
page += 1
} else {
break
}
} else {
break
}
}
for i := 0; i < len(backlogs); i++ {
mm.processBacklog(ch, backlogs[i])
}
} else {
backlog, resp := mm.conn.Client.GetPostsForChannel(ch.Id, 0, mm.initial_backlog, "")
if resp.Error == nil {
mm.processBacklog(ch, backlog)
} else {
log.Warnf("Could not get channel backlog: %s", resp.Error)
}
}
}
func (mm *Mattermost) processBacklog(ch *model.Channel, backlog *model.PostList) {
for i := 0; i < len(backlog.Order); i++ {
post_id := backlog.Order[len(backlog.Order)-i-1]
post := backlog.Posts[post_id]
post_time := time.Unix(post.CreateAt/1000, 0)
post.Message = fmt.Sprintf("[%s] %s",
post_time.Format("2006-01-02 15:04 MST"), post.Message)
mm.handlePost(ch.Name, post, true)
}
}
func (mm *Mattermost) handleLoop(msgCh chan *matterclient.Message, quitCh chan struct{}) {
for {
select {
case <-quitCh:
break
case msg := <-msgCh:
log.Tracef("Mattermost: %#v\n", msg)
log.Tracef("Mattermost raw: %#v\n", msg.Raw)
err := mm.handlePosted(msg.Raw)
if err != nil {
log.Warnf("Mattermost error: %s", err)
}
}
}
}
func (mm *Mattermost) updateUserInfo(user *model.User) {
userId := UserID(fmt.Sprintf("%s@%s", user.Username, mm.server))
userDisp := user.GetDisplayName(model.SHOW_NICKNAME_FULLNAME)
mm.caches.Lock()
defer mm.caches.Unlock()
if lastdn, ok := mm.caches.displayname[userId]; !ok || lastdn != userDisp {
ui := &UserInfo{
DisplayName: userDisp,
}
if user.LastPictureUpdate > 0 {
ui.Avatar = SMediaObject{&LazyBlobMediaObject{
ObjectFilename: fmt.Sprintf("%s-%d",
user.Username,
user.LastPictureUpdate),
GetFn: func(o *LazyBlobMediaObject) error {
img, resp := mm.conn.Client.GetProfileImage(user.Id, "")
if resp.Error != nil {
log.Warnf("Could not get profile picture: %s", resp.Error.Error())
return resp.Error
}
o.ObjectData = img
o.ObjectMimetype = http.DetectContentType(img)
return nil
},
}}
}
mm.handler.UserInfoUpdated(userId, ui)
mm.caches.displayname[userId] = userDisp
}
}
func (mm *Mattermost) ensureJoined(user *model.User, roomId RoomID) {
userId := UserID(fmt.Sprintf("%s@%s", user.Username, mm.server))
cache_key := fmt.Sprintf("%s / %s", userId, roomId)
mm.caches.Lock()
defer mm.caches.Unlock()
if _, ok := mm.caches.sentjoined[cache_key]; !ok {
mm.handler.Event(&Event{
Author: userId,
Room: roomId,
Type: EVENT_JOIN,
})
mm.caches.sentjoined[cache_key] = true
}
}
func (mm *Mattermost) handlePosted(msg *model.WebSocketEvent) error {
channel_name, ok := msg.Data["channel_name"].(string)
if !ok {
return nil
}
post_str := msg.Data["post"].(string)
var post model.Post
err := json.Unmarshal([]byte(post_str), &post)
if err != nil {
return err
}
return mm.handlePost(channel_name, &post, false)
}
func (mm *Mattermost) handlePost(channel_name string, post *model.Post, only_messages bool) error {
// Skip self messages
if post.UserId == mm.conn.User.Id {
return nil
}
// Find sending user
user := mm.conn.GetUser(post.UserId)
if user == nil {
return fmt.Errorf("Invalid user")
}
userId := UserID(fmt.Sprintf("%s@%s", user.Username, mm.server))
mm.updateUserInfo(user)
// Build message event
msg_ev := &Event{
Id: post.Id,
Author: userId,
Text: post.Message,
Type: EVENT_MESSAGE,
}
if post.Type == "me" {
msg_ev.Type = EVENT_ACTION
}
// Handle files
if post.Metadata != nil && post.Metadata.Files != nil {
msg_ev.Attachments = []SMediaObject{}
for _, file := range post.Metadata.Files {
media_object := &LazyBlobMediaObject{
ObjectFilename: file.Name,
ObjectMimetype: file.MimeType,
GetFn: func(o *LazyBlobMediaObject) error {
blob, resp := mm.conn.Client.GetFile(file.Id)
if resp.Error != nil {
return resp.Error
}
o.ObjectData = blob
return nil
},
}
if file.Width > 0 {
media_object.ObjectImageSize = &ImageSize{
Width: file.Width,
Height: file.Height,
}
}
msg_ev.Attachments = append(msg_ev.Attachments, SMediaObject{media_object})
}
}
// Dispatch as PM or as room message
if len(strings.Split(channel_name, "__")) == 2 {
// Private message, no need to find room id
if user.Id == mm.conn.User.Id {
// Skip self sent messages
return nil
}
mm.handler.Event(msg_ev)
mm.handler.CachePut(fmt.Sprintf("last_seen_%s", post.ChannelId), post.Id)
} else {
interested, roomId := mm.reverseRoomId(post.ChannelId)
if !interested {
return nil
}
if roomId == "" {
return fmt.Errorf("Invalid channel id")
}
mm.ensureJoined(user, roomId)
if post.Type == "system_header_change" {
if !only_messages {
new_header := post.Props["new_header"].(string)
mm.handler.RoomInfoUpdated(roomId, userId, &RoomInfo{
Topic: new_header,
})
}
} else if post.Type == "" || post.Type == "me" {
msg_ev.Room = roomId
mm.handler.Event(msg_ev)
mm.handler.CachePut(fmt.Sprintf("last_seen_%s", post.ChannelId), post.Id)
} else {
return fmt.Errorf("Unhandled post type: %s", post.Type)
}
}
return nil
}
