mirror of
https://github.com/42wim/matterbridge.git
synced 2024-11-26 22:19:25 +01:00
344 lines
8.4 KiB
Go
344 lines
8.4 KiB
Go
package bslack
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import (
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"context"
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"fmt"
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"strings"
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"sync"
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"time"
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"github.com/42wim/matterbridge/bridge/config"
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"github.com/sirupsen/logrus"
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"github.com/slack-go/slack"
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)
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const minimumRefreshInterval = 10 * time.Second
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type users struct {
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log *logrus.Entry
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sc *slack.Client
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users map[string]*slack.User
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usersMutex sync.RWMutex
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usersSyncPoints map[string]chan struct{}
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refreshInProgress bool
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earliestRefresh time.Time
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refreshMutex sync.Mutex
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}
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func newUserManager(log *logrus.Entry, sc *slack.Client) *users {
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return &users{
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log: log,
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sc: sc,
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users: make(map[string]*slack.User),
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usersSyncPoints: make(map[string]chan struct{}),
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earliestRefresh: time.Now(),
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}
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}
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func (b *users) getUser(id string) *slack.User {
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b.usersMutex.RLock()
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user, ok := b.users[id]
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b.usersMutex.RUnlock()
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if ok {
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return user
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}
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b.populateUser(id)
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b.usersMutex.RLock()
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defer b.usersMutex.RUnlock()
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return b.users[id]
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}
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func (b *users) getUsername(id string) string {
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if user := b.getUser(id); user != nil {
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if user.Profile.DisplayName != "" {
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return user.Profile.DisplayName
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}
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return user.Name
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}
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b.log.Warnf("Could not find user with ID '%s'", id)
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return ""
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}
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func (b *users) getAvatar(id string) string {
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if user := b.getUser(id); user != nil {
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return user.Profile.Image48
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}
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return ""
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}
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func (b *users) populateUser(userID string) {
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for {
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b.usersMutex.Lock()
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_, exists := b.users[userID]
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if exists {
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// already in cache
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b.usersMutex.Unlock()
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return
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}
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if syncPoint, ok := b.usersSyncPoints[userID]; ok {
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// Another goroutine is already populating this user for us so wait on it to finish.
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b.usersMutex.Unlock()
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<-syncPoint
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// We do not return and iterate again to check that the entry does indeed exist
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// in case the previous query failed for some reason.
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} else {
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b.usersSyncPoints[userID] = make(chan struct{})
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defer func() {
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// Wake up any waiting goroutines and remove the synchronization point.
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close(b.usersSyncPoints[userID])
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delete(b.usersSyncPoints, userID)
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}()
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break
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}
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}
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// Do not hold the lock while fetching information from Slack
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// as this might take an unbounded amount of time.
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b.usersMutex.Unlock()
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user, err := b.sc.GetUserInfo(userID)
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if err != nil {
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b.log.Debugf("GetUserInfo failed for %v: %v", userID, err)
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return
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}
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b.usersMutex.Lock()
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defer b.usersMutex.Unlock()
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// Register user information.
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b.users[userID] = user
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}
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func (b *users) invalidateUser(userID string) {
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b.usersMutex.Lock()
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defer b.usersMutex.Unlock()
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delete(b.users, userID)
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}
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func (b *users) populateUsers(wait bool) {
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b.refreshMutex.Lock()
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if !wait && (time.Now().Before(b.earliestRefresh) || b.refreshInProgress) {
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b.log.Debugf("Not refreshing user list as it was done less than %v ago.", minimumRefreshInterval)
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b.refreshMutex.Unlock()
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return
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}
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for b.refreshInProgress {
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b.refreshMutex.Unlock()
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time.Sleep(time.Second)
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b.refreshMutex.Lock()
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}
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b.refreshInProgress = true
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b.refreshMutex.Unlock()
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newUsers := map[string]*slack.User{}
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pagination := b.sc.GetUsersPaginated(slack.GetUsersOptionLimit(200))
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count := 0
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for {
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var err error
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pagination, err = pagination.Next(context.Background())
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time.Sleep(time.Second)
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if err != nil {
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if pagination.Done(err) {
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break
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}
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if err = handleRateLimit(b.log, err); err != nil {
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b.log.Errorf("Could not retrieve users: %#v", err)
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return
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}
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continue
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}
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for i := range pagination.Users {
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newUsers[pagination.Users[i].ID] = &pagination.Users[i]
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}
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b.log.Debugf("getting %d users", len(pagination.Users))
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count++
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// more > 2000 users, slack will complain and ratelimit. break
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if count > 10 {
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b.log.Info("Large slack detected > 2000 users, skipping loading complete userlist.")
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break
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}
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}
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b.usersMutex.Lock()
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defer b.usersMutex.Unlock()
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b.users = newUsers
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b.refreshMutex.Lock()
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defer b.refreshMutex.Unlock()
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b.earliestRefresh = time.Now().Add(minimumRefreshInterval)
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b.refreshInProgress = false
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}
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type channels struct {
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log *logrus.Entry
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sc *slack.Client
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channelsByID map[string]*slack.Channel
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channelsByName map[string]*slack.Channel
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channelsMutex sync.RWMutex
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channelMembers map[string][]string
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channelMembersMutex sync.RWMutex
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refreshInProgress bool
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earliestRefresh time.Time
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refreshMutex sync.Mutex
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}
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func newChannelManager(log *logrus.Entry, sc *slack.Client) *channels {
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return &channels{
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log: log,
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sc: sc,
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channelsByID: make(map[string]*slack.Channel),
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channelsByName: make(map[string]*slack.Channel),
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earliestRefresh: time.Now(),
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}
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}
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func (b *channels) getChannel(channel string) (*slack.Channel, error) {
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if strings.HasPrefix(channel, "ID:") {
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return b.getChannelByID(strings.TrimPrefix(channel, "ID:"))
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}
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return b.getChannelByName(channel)
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}
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func (b *channels) getChannelByName(name string) (*slack.Channel, error) {
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return b.getChannelBy(name, b.channelsByName)
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}
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func (b *channels) getChannelByID(id string) (*slack.Channel, error) {
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return b.getChannelBy(id, b.channelsByID)
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}
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func (b *channels) getChannelBy(lookupKey string, lookupMap map[string]*slack.Channel) (*slack.Channel, error) {
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b.channelsMutex.RLock()
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defer b.channelsMutex.RUnlock()
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if channel, ok := lookupMap[lookupKey]; ok {
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return channel, nil
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}
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return nil, fmt.Errorf("channel %s not found", lookupKey)
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}
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func (b *channels) getChannelMembers(users *users) config.ChannelMembers {
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b.channelMembersMutex.RLock()
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defer b.channelMembersMutex.RUnlock()
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membersInfo := config.ChannelMembers{}
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for channelID, members := range b.channelMembers {
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for _, member := range members {
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channelName := ""
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userName := ""
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userNick := ""
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user := users.getUser(member)
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if user != nil {
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userName = user.Name
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userNick = user.Profile.DisplayName
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}
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channel, _ := b.getChannelByID(channelID)
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if channel != nil {
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channelName = channel.Name
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}
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memberInfo := config.ChannelMember{
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Username: userName,
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Nick: userNick,
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UserID: member,
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ChannelID: channelID,
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ChannelName: channelName,
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}
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membersInfo = append(membersInfo, memberInfo)
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}
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}
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return membersInfo
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}
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func (b *channels) registerChannel(channel slack.Channel) {
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b.channelsMutex.Lock()
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defer b.channelsMutex.Unlock()
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b.channelsByID[channel.ID] = &channel
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b.channelsByName[channel.Name] = &channel
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}
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func (b *channels) populateChannels(wait bool) {
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b.refreshMutex.Lock()
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if !wait && (time.Now().Before(b.earliestRefresh) || b.refreshInProgress) {
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b.log.Debugf("Not refreshing channel list as it was done less than %v seconds ago.", minimumRefreshInterval)
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b.refreshMutex.Unlock()
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return
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}
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for b.refreshInProgress {
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b.refreshMutex.Unlock()
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time.Sleep(time.Second)
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b.refreshMutex.Lock()
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}
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b.refreshInProgress = true
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b.refreshMutex.Unlock()
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newChannelsByID := map[string]*slack.Channel{}
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newChannelsByName := map[string]*slack.Channel{}
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newChannelMembers := make(map[string][]string)
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// We only retrieve public and private channels, not IMs
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// and MPIMs as those do not have a channel name.
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queryParams := &slack.GetConversationsParameters{
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ExcludeArchived: true,
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Types: []string{"public_channel,private_channel"},
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Limit: 1000,
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}
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for {
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channels, nextCursor, err := b.sc.GetConversations(queryParams)
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if err != nil {
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if err = handleRateLimit(b.log, err); err != nil {
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b.log.Errorf("Could not retrieve channels: %#v", err)
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return
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}
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continue
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}
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for i := range channels {
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newChannelsByID[channels[i].ID] = &channels[i]
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newChannelsByName[channels[i].Name] = &channels[i]
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// also find all the members in every channel
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// comment for now, issues on big slacks
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/*
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members, err := b.getUsersInConversation(channels[i].ID)
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if err != nil {
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if err = b.handleRateLimit(err); err != nil {
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b.Log.Errorf("Could not retrieve channel members: %#v", err)
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return
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}
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continue
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}
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newChannelMembers[channels[i].ID] = members
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*/
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}
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if nextCursor == "" {
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break
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}
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queryParams.Cursor = nextCursor
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}
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b.channelsMutex.Lock()
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defer b.channelsMutex.Unlock()
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b.channelsByID = newChannelsByID
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b.channelsByName = newChannelsByName
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b.channelMembersMutex.Lock()
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defer b.channelMembersMutex.Unlock()
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b.channelMembers = newChannelMembers
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b.refreshMutex.Lock()
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defer b.refreshMutex.Unlock()
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b.earliestRefresh = time.Now().Add(minimumRefreshInterval)
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b.refreshInProgress = false
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}
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