mattermost-community-enterp.../platform/services/sharedchannel/sync_recv.go
Claude ec1f89217a Merge: Complete Mattermost Server with Community Enterprise
Full Mattermost server source with integrated Community Enterprise features.
Includes vendor directory for offline/air-gapped builds.

Structure:
- enterprise-impl/: Enterprise feature implementations
- enterprise-community/: Init files that register implementations
- enterprise/: Bridge imports (community_imports.go)
- vendor/: All dependencies for offline builds

Build (online):
  go build ./cmd/mattermost

Build (offline/air-gapped):
  go build -mod=vendor ./cmd/mattermost

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
2025-12-17 23:59:07 +09:00

797 lines
30 KiB
Go

// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.
package sharedchannel
import (
"context"
"encoding/json"
"errors"
"fmt"
"strconv"
"strings"
"github.com/mattermost/mattermost/server/public/model"
"github.com/mattermost/mattermost/server/public/shared/mlog"
"github.com/mattermost/mattermost/server/public/shared/request"
"github.com/mattermost/mattermost/server/v8/platform/services/remotecluster"
)
var (
ErrRemoteIDMismatch = errors.New("remoteID mismatch")
ErrChannelIDMismatch = errors.New("channelID mismatch")
ErrUserDMPermission = errors.New("users cannot DM each other")
ErrChannelNotShared = errors.New("channel is no longer shared")
)
func (scs *Service) onReceiveSyncMessage(msg model.RemoteClusterMsg, rc *model.RemoteCluster, response *remotecluster.Response) error {
if msg.Topic != TopicSync && msg.Topic != TopicChannelMembership && msg.Topic != TopicGlobalUserSync {
return fmt.Errorf("wrong topic, expected sync-related topic, got `%s`", msg.Topic)
}
if len(msg.Payload) == 0 {
return errors.New("empty sync message")
}
if scs.server.Log().IsLevelEnabled(mlog.LvlSharedChannelServiceMessagesInbound) {
scs.server.Log().Log(mlog.LvlSharedChannelServiceMessagesInbound, "inbound message",
mlog.String("remote", rc.DisplayName),
mlog.String("msg", msg.Payload),
)
}
var sm model.SyncMsg
if err := json.Unmarshal(msg.Payload, &sm); err != nil {
return fmt.Errorf("invalid sync message: %w", err)
}
return scs.processSyncMessage(request.EmptyContext(scs.server.Log()), &sm, rc, response)
}
func (scs *Service) processGlobalUserSync(rctx request.CTX, syncMsg *model.SyncMsg, rc *model.RemoteCluster, response *remotecluster.Response) error {
syncResp := model.SyncResponse{
UserErrors: make([]string, 0),
UsersSyncd: make([]string, 0),
}
scs.server.Log().Log(mlog.LvlSharedChannelServiceDebug, "Processing global user sync",
mlog.String("remote", rc.Name),
mlog.Int("user_count", len(syncMsg.Users)),
)
// Process all users in the sync message
for _, user := range syncMsg.Users {
if userSaved, err := scs.upsertSyncUser(rctx, user, nil, rc); err != nil {
syncResp.UserErrors = append(syncResp.UserErrors, user.Id)
} else {
syncResp.UsersSyncd = append(syncResp.UsersSyncd, userSaved.Id)
if syncResp.UsersLastUpdateAt < user.UpdateAt {
syncResp.UsersLastUpdateAt = user.UpdateAt
}
scs.server.Log().Log(mlog.LvlSharedChannelServiceDebug, "Global user upserted via sync",
mlog.String("remote", rc.Name),
mlog.String("user_id", user.Id),
)
}
}
return response.SetPayload(syncResp)
}
func (scs *Service) processSyncMessage(rctx request.CTX, syncMsg *model.SyncMsg, rc *model.RemoteCluster, response *remotecluster.Response) error {
var targetChannel *model.Channel
var team *model.Team
var err error
syncResp := model.SyncResponse{
UserErrors: make([]string, 0),
UsersSyncd: make([]string, 0),
PostErrors: make([]string, 0),
ReactionErrors: make([]string, 0),
AcknowledgementErrors: make([]string, 0),
}
// Check if feature flag is enabled for membership changes
membershipSyncEnabled := scs.server.Config().FeatureFlags.EnableSharedChannelsMemberSync
hasMembershipChanges := len(syncMsg.MembershipChanges) > 0
// If this message only contains membership changes and feature is disabled, skip it
if hasMembershipChanges && !membershipSyncEnabled && len(syncMsg.Users) == 0 && len(syncMsg.Posts) == 0 && len(syncMsg.Reactions) == 0 {
return nil
}
scs.server.Log().Log(mlog.LvlSharedChannelServiceDebug, "Sync msg received",
mlog.String("remote", rc.Name),
mlog.String("channel_id", syncMsg.ChannelId),
mlog.Int("user_count", len(syncMsg.Users)),
mlog.Int("post_count", len(syncMsg.Posts)),
mlog.Int("reaction_count", len(syncMsg.Reactions)),
mlog.Int("acknowledgement_count", len(syncMsg.Acknowledgements)),
mlog.Int("status_count", len(syncMsg.Statuses)),
mlog.Int("membership_change_count", len(syncMsg.MembershipChanges)),
)
// Check if this is a global user sync message (no channel ID and only users)
if syncMsg.ChannelId == "" {
if len(syncMsg.Posts) != 0 ||
len(syncMsg.Reactions) != 0 ||
len(syncMsg.Statuses) != 0 {
return fmt.Errorf("global user sync message should not contain posts, reactions or statuses")
}
if len(syncMsg.Users) == 0 {
return nil
}
// Check if feature flag is enabled
if !scs.isGlobalUserSyncEnabled() {
return nil
}
return scs.processGlobalUserSync(rctx, syncMsg, rc, response)
}
// For regular sync messages, we need a specific channel
if targetChannel, err = scs.server.GetStore().Channel().Get(syncMsg.ChannelId, true); err != nil {
// if the channel doesn't exist then none of these sync items are going to work.
return fmt.Errorf("channel not found processing sync message: %w", err)
}
// make sure target channel is shared with the remote
exists, err := scs.server.GetStore().SharedChannel().HasRemote(targetChannel.Id, rc.RemoteId)
if err != nil {
return fmt.Errorf("cannot check channel share state for sync message: %w", err)
}
if !exists {
return fmt.Errorf("cannot process sync message; %w: %s",
ErrChannelNotShared, syncMsg.ChannelId)
}
// add/update users before posts
for _, user := range syncMsg.Users {
if userSaved, err := scs.upsertSyncUser(rctx, user, targetChannel, rc); err != nil {
scs.server.Log().Log(mlog.LvlSharedChannelServiceError, "Error upserting sync user",
mlog.String("remote", rc.Name),
mlog.String("channel_id", syncMsg.ChannelId),
mlog.String("user_id", user.Id),
mlog.Err(err))
} else {
syncResp.UsersSyncd = append(syncResp.UsersSyncd, userSaved.Id)
if syncResp.UsersLastUpdateAt < user.UpdateAt {
syncResp.UsersLastUpdateAt = user.UpdateAt
}
scs.server.Log().Log(mlog.LvlSharedChannelServiceDebug, "User upserted via sync",
mlog.String("remote", rc.Name),
mlog.String("channel_id", syncMsg.ChannelId),
mlog.String("user_id", user.Id),
)
}
}
for _, post := range syncMsg.Posts {
if syncMsg.ChannelId != post.ChannelId {
scs.server.Log().Log(mlog.LvlSharedChannelServiceError, "ChannelId mismatch",
mlog.String("remote", rc.Name),
mlog.String("sm.ChannelId", syncMsg.ChannelId),
mlog.String("sm.Post.ChannelId", post.ChannelId),
mlog.String("PostId", post.Id),
)
syncResp.PostErrors = append(syncResp.PostErrors, post.Id)
continue
}
if (targetChannel.Type != model.ChannelTypeDirect && targetChannel.Type != model.ChannelTypeGroup) && team == nil {
var err2 error
team, err2 = scs.server.GetStore().Channel().GetTeamForChannel(syncMsg.ChannelId)
if err2 != nil {
scs.server.Log().Log(mlog.LvlSharedChannelServiceError, "Error getting Team for Channel",
mlog.String("ChannelId", post.ChannelId),
mlog.String("PostId", post.Id),
mlog.String("remote", rc.Name),
mlog.Err(err2),
)
syncResp.PostErrors = append(syncResp.PostErrors, post.Id)
continue
}
}
// process perma-links for remote
if team != nil {
post.Message = scs.processPermalinkFromRemote(post, team)
}
// add/update post
rpost, err := scs.upsertSyncPost(post, targetChannel, rc, syncMsg.MentionTransforms)
if err != nil {
syncResp.PostErrors = append(syncResp.PostErrors, post.Id)
scs.server.Log().Log(mlog.LvlSharedChannelServiceError, "Error upserting sync post",
mlog.String("post_id", post.Id),
mlog.String("channel_id", post.ChannelId),
mlog.String("remote", rc.Name),
mlog.Err(err),
)
} else if syncResp.PostsLastUpdateAt < rpost.UpdateAt {
syncResp.PostsLastUpdateAt = rpost.UpdateAt
}
}
// add/remove reactions
for _, reaction := range syncMsg.Reactions {
if _, err := scs.upsertSyncReaction(reaction, targetChannel, rc); err != nil {
scs.server.Log().Log(mlog.LvlSharedChannelServiceError, "Error upserting sync reaction",
mlog.String("remote", rc.Name),
mlog.String("user_id", reaction.UserId),
mlog.String("post_id", reaction.PostId),
mlog.String("emoji", reaction.EmojiName),
mlog.Int("delete_at", reaction.DeleteAt),
mlog.Err(err),
)
} else {
scs.server.Log().Log(mlog.LvlSharedChannelServiceDebug, "Reaction upserted via sync",
mlog.String("remote", rc.Name),
mlog.String("user_id", reaction.UserId),
mlog.String("post_id", reaction.PostId),
mlog.String("emoji", reaction.EmojiName),
mlog.Int("delete_at", reaction.DeleteAt),
)
if syncResp.ReactionsLastUpdateAt < reaction.UpdateAt {
syncResp.ReactionsLastUpdateAt = reaction.UpdateAt
}
}
}
// add/remove acknowledgements
for _, acknowledgement := range syncMsg.Acknowledgements {
if _, err := scs.upsertSyncAcknowledgement(acknowledgement, targetChannel, rc); err != nil {
scs.server.Log().Log(mlog.LvlSharedChannelServiceError, "Error upserting sync acknowledgement",
mlog.String("remote", rc.Name),
mlog.String("user_id", acknowledgement.UserId),
mlog.String("post_id", acknowledgement.PostId),
mlog.Int("acknowledged_at", acknowledgement.AcknowledgedAt),
mlog.Err(err),
)
syncResp.AcknowledgementErrors = append(syncResp.AcknowledgementErrors, acknowledgement.PostId)
} else {
scs.server.Log().Log(mlog.LvlSharedChannelServiceDebug, "Acknowledgement upserted via sync",
mlog.String("remote", rc.Name),
mlog.String("user_id", acknowledgement.UserId),
mlog.String("post_id", acknowledgement.PostId),
mlog.Int("acknowledged_at", acknowledgement.AcknowledgedAt),
)
if syncResp.AcknowledgementsLastUpdateAt < acknowledgement.AcknowledgedAt {
syncResp.AcknowledgementsLastUpdateAt = acknowledgement.AcknowledgedAt
}
}
}
for _, status := range syncMsg.Statuses {
scs.app.SaveAndBroadcastStatus(status)
}
// Process membership changes after users have been synced
if hasMembershipChanges && membershipSyncEnabled {
if err := scs.onReceiveMembershipChanges(syncMsg, rc, response); err != nil {
scs.server.Log().Log(mlog.LvlSharedChannelServiceError, "Error processing membership changes",
mlog.String("remote", rc.Name),
mlog.String("channel_id", syncMsg.ChannelId),
mlog.Int("change_count", len(syncMsg.MembershipChanges)),
mlog.Err(err),
)
// Don't fail the entire sync if membership changes fail
}
}
response.SetPayload(syncResp)
return nil
}
func (scs *Service) upsertSyncUser(rctx request.CTX, user *model.User, channel *model.Channel, rc *model.RemoteCluster) (*model.User, error) {
var err error
// Check if user already exists
euser, err := scs.server.GetStore().User().Get(context.Background(), user.Id)
if err != nil {
if _, ok := err.(errNotFound); !ok {
return nil, fmt.Errorf("error checking sync user: %w", err)
}
}
var userSaved *model.User
if euser == nil {
// new user. Make sure the remoteID is correct and insert the record
// Preserve original remote ID before overwriting RemoteId
originalRemoteId := user.GetRemoteID()
user.RemoteId = model.NewPointer(rc.RemoteId)
if user.Props == nil || user.Props[model.UserPropsKeyOriginalRemoteId] == "" {
if originalRemoteId == "" {
originalRemoteId = rc.RemoteId // If no original RemoteId, use current sync sender
}
user.SetProp(model.UserPropsKeyOriginalRemoteId, originalRemoteId)
}
if userSaved, err = scs.insertSyncUser(rctx, user, channel, rc); err != nil {
return nil, err
}
} else {
// existing user. Make sure user belongs to the remote that issued the update
if euser.GetRemoteID() != rc.RemoteId {
scs.server.Log().Log(mlog.LvlSharedChannelServiceError, "RemoteID mismatch sync'ing user",
mlog.String("remote", rc.Name),
mlog.String("user_id", user.Id),
mlog.String("existing_user_remote_id", euser.GetRemoteID()),
mlog.String("update_user_remote_id", user.GetRemoteID()),
)
return nil, fmt.Errorf("error updating user: %w", ErrRemoteIDMismatch)
}
// save the updated username and email in props
user.SetProp(model.UserPropsKeyRemoteUsername, user.Username)
user.SetProp(model.UserPropsKeyRemoteEmail, user.Email)
patch := &model.UserPatch{
Username: &user.Username,
Nickname: &user.Nickname,
FirstName: &user.FirstName,
LastName: &user.LastName,
Props: user.Props,
Position: &user.Position,
Locale: &user.Locale,
Timezone: user.Timezone,
}
if userSaved, err = scs.updateSyncUser(rctx, patch, euser, channel, rc); err != nil {
return nil, err
}
}
// Add user to team and channel. We do this here regardless of whether the user was
// just created or patched since there are three steps to adding a user
// (insert rec, add to team, add to channel) and any one could fail.
// Instead of undoing what succeeded on any failure we simply do all steps each
// time. AddUserToChannel & AddUserToTeamByTeamId do not error if user was already
// added and exit quickly. Not needed for DMs where teamId is empty.
if channel != nil && channel.TeamId != "" {
// add user to team
if err := scs.app.AddUserToTeamByTeamId(request.EmptyContext(scs.server.Log()), channel.TeamId, userSaved); err != nil {
return nil, fmt.Errorf("error adding sync user to Team: %w", err)
}
// add user to channel
if _, err := scs.app.AddUserToChannel(rctx, userSaved, channel, false); err != nil {
return nil, fmt.Errorf("error adding sync user to ChannelMembers: %w", err)
}
}
return userSaved, nil
}
func (scs *Service) insertSyncUser(rctx request.CTX, user *model.User, _ *model.Channel, rc *model.RemoteCluster) (*model.User, error) {
var err error
var userSaved *model.User
var suffix string
// ensure the new user is created with system_user role and random password.
user = sanitizeUserForSync(user)
// save the original username and email in props
user.SetProp(model.UserPropsKeyRemoteUsername, user.Username)
user.SetProp(model.UserPropsKeyRemoteEmail, user.Email)
// Apply a suffix to the username until it is unique. Collisions will be quite
// rare since we are joining a username that is unique at a remote site with a unique
// name for that site. However we need to truncate the combined name to 64 chars and
// that might introduce a collision.
for i := 1; i <= MaxUpsertRetries; i++ {
if i > 1 {
suffix = strconv.FormatInt(int64(i), 10)
}
user.Username = mungUsername(user.Username, rc.Name, suffix, model.UserNameMaxLength)
user.Email = model.NewId()
if userSaved, err = scs.server.GetStore().User().Save(rctx, user); err != nil {
field, ok := isConflictError(err)
if !ok {
break
}
if field == "email" || field == "username" {
// username or email collision; try again with different suffix
scs.server.Log().Log(mlog.LvlSharedChannelServiceWarn, "Collision inserting sync user",
mlog.String("field", field),
mlog.String("username", user.Username),
mlog.String("email", user.Email),
mlog.Int("attempt", i),
mlog.Err(err),
)
}
} else {
scs.app.NotifySharedChannelUserUpdate(userSaved)
return userSaved, nil
}
}
return nil, fmt.Errorf("error inserting sync user %s: %w", user.Id, err)
}
func (scs *Service) updateSyncUser(rctx request.CTX, patch *model.UserPatch, user *model.User, _ *model.Channel, rc *model.RemoteCluster) (*model.User, error) {
var err error
var update *model.UserUpdate
var suffix string
// preserve existing real username/email since Patch will over-write them;
// the real username/email in props can be updated if they don't contain colons,
// meaning the update is coming from the user's origin server (not munged).
realUsername, _ := user.GetProp(model.UserPropsKeyRemoteUsername)
realEmail, _ := user.GetProp(model.UserPropsKeyRemoteEmail)
if patch.Username != nil && !strings.Contains(*patch.Username, ":") {
realUsername = *patch.Username
}
if patch.Email != nil && !strings.Contains(*patch.Email, ":") {
realEmail = *patch.Email
}
user.Patch(patch)
user = sanitizeUserForSync(user)
user.SetProp(model.UserPropsKeyRemoteUsername, realUsername)
user.SetProp(model.UserPropsKeyRemoteEmail, realEmail)
// Apply a suffix to the username until it is unique.
for i := 1; i <= MaxUpsertRetries; i++ {
if i > 1 {
suffix = strconv.FormatInt(int64(i), 10)
}
user.Username = mungUsername(user.Username, rc.Name, suffix, model.UserNameMaxLength)
user.Email = model.NewId()
if update, err = scs.server.GetStore().User().Update(rctx, user, false); err != nil {
field, ok := isConflictError(err)
if !ok {
break
}
if field == "email" || field == "username" {
// username or email collision; try again with different suffix
scs.server.Log().Log(mlog.LvlSharedChannelServiceWarn, "Collision updating sync user",
mlog.String("field", field),
mlog.String("username", user.Username),
mlog.String("email", user.Email),
mlog.Int("attempt", i),
mlog.Err(err),
)
}
} else {
scs.platform.InvalidateCacheForUser(update.New.Id)
scs.app.NotifySharedChannelUserUpdate(update.New)
return update.New, nil
}
}
return nil, fmt.Errorf("error updating sync user %s: %w", user.Id, err)
}
func (scs *Service) upsertSyncPost(post *model.Post, targetChannel *model.Channel, rc *model.RemoteCluster, mentionTransforms map[string]string) (*model.Post, error) {
var appErr *model.AppError
post.RemoteId = model.NewPointer(rc.RemoteId)
rctx := request.EmptyContext(scs.server.Log())
rpost, err := scs.server.GetStore().Post().GetSingle(rctx, post.Id, true)
if err != nil {
if _, ok := err.(errNotFound); !ok {
return nil, fmt.Errorf("error checking sync post: %w", err)
}
}
// ensure the post is in the target channel. This ensures the post can only be associated with a channel
// that is shared with the remote.
if post.ChannelId != targetChannel.Id || (rpost != nil && rpost.ChannelId != targetChannel.Id) {
return nil, fmt.Errorf("post sync failed: %w", ErrChannelIDMismatch)
}
if rpost == nil {
// post doesn't exist; check that user belongs to remote and create post.
// user is not checked for edit/delete because admins can perform those actions
user, err := scs.server.GetStore().User().Get(context.TODO(), post.UserId)
if err != nil {
return nil, fmt.Errorf("error fetching user for post sync: %w", err)
}
if user.GetRemoteID() != rc.RemoteId {
return nil, fmt.Errorf("post sync failed: %w", ErrRemoteIDMismatch)
}
scs.transformMentionsOnReceive(rctx, post, targetChannel, rc, mentionTransforms)
rpost, appErr = scs.app.CreatePost(rctx, post, targetChannel, model.CreatePostFlags{TriggerWebhooks: true, SetOnline: true})
if appErr == nil {
scs.server.Log().Log(mlog.LvlSharedChannelServiceDebug, "Created sync post",
mlog.String("post_id", post.Id),
mlog.String("channel_id", post.ChannelId),
)
}
} else if post.DeleteAt > 0 {
// delete post
rpost, appErr = scs.app.DeletePost(rctx, post.Id, post.UserId)
if appErr == nil {
scs.server.Log().Log(mlog.LvlSharedChannelServiceDebug, "Deleted sync post",
mlog.String("post_id", post.Id),
mlog.String("channel_id", post.ChannelId),
)
}
} else if post.EditAt > rpost.EditAt || post.Message != rpost.Message || post.UpdateAt > rpost.UpdateAt || post.Metadata != nil {
scs.transformMentionsOnReceive(rctx, post, targetChannel, rc, mentionTransforms)
var priority *model.PostPriority
var acknowledgements []*model.PostAcknowledgement
if post.Metadata != nil {
// Save the received priority
if post.Metadata.Priority != nil {
priority = post.Metadata.Priority
}
// Save the received acknowledgements
if post.Metadata.Acknowledgements != nil {
acknowledgements = post.Metadata.Acknowledgements
}
}
// First update the basic post
rpost, appErr = scs.app.UpdatePost(rctx, post, nil)
if appErr != nil {
rerr := errors.New(appErr.Error())
return nil, rerr
}
// Handle priority metadata separately if needed
if priority != nil {
rpost = scs.syncRemotePriorityMetadata(rctx, post, priority, rpost)
}
// Handle acknowledgements metadata separately if needed
if acknowledgements != nil {
rpost = scs.syncRemoteAcknowledgementsMetadata(rctx, post, acknowledgements, rpost)
}
} else {
// nothing to update
scs.server.Log().Log(mlog.LvlSharedChannelServiceDebug, "Update to sync post ignored",
mlog.String("post_id", post.Id),
mlog.String("channel_id", post.ChannelId),
)
}
var rerr error
if appErr != nil {
rerr = errors.New(appErr.Error())
}
return rpost, rerr
}
// syncRemotePriorityMetadata handles syncing priority metadata from a remote post.
// It completely replaces existing priority settings with the ones from the remote post,
// regardless of update type.
func (scs *Service) syncRemotePriorityMetadata(rctx request.CTX, post *model.Post, priority *model.PostPriority, rpost *model.Post) *model.Post {
// First, create a new priority object with proper post and channel IDs
newPriority := &model.PostPriority{
PostId: post.Id,
ChannelId: post.ChannelId,
}
// Copy the priority values from the remote post
if priority.Priority != nil {
newPriority.Priority = priority.Priority
}
if priority.RequestedAck != nil {
newPriority.RequestedAck = priority.RequestedAck
}
if priority.PersistentNotifications != nil {
newPriority.PersistentNotifications = priority.PersistentNotifications
}
// Save the new priority - this will replace any existing priority for the post
savedPriority, priorityErr := scs.server.GetStore().PostPriority().Save(newPriority)
if priorityErr != nil {
scs.server.Log().Log(mlog.LvlSharedChannelServiceError, "Error saving post priority from remote",
mlog.String("post_id", post.Id),
mlog.String("channel_id", post.ChannelId),
mlog.Err(priorityErr),
)
} else {
// If the priority is successfully saved, ensure it's in the returned post
if rpost.Metadata == nil {
rpost.Metadata = &model.PostMetadata{}
}
// Use the saved priority from the database operation
rpost.Metadata.Priority = savedPriority
}
return rpost
}
// syncRemoteAcknowledgementsMetadata handles syncing acknowledgements metadata from a remote post.
// It replaces all existing acknowledgements with the ones from the remote post.
func (scs *Service) syncRemoteAcknowledgementsMetadata(rctx request.CTX, post *model.Post, acknowledgements []*model.PostAcknowledgement, rpost *model.Post) *model.Post {
// When syncing from remote, we completely replace the existing acknowledgements
// with the ones received from the remote, regardless of update type
// Get existing acknowledgements and delete them using batch operation
existingAcks, appErrGet := scs.app.GetAcknowledgementsForPost(post.Id)
if appErrGet != nil {
scs.server.Log().Log(mlog.LvlSharedChannelServiceError, "Error getting existing acknowledgements for remote sync",
mlog.String("post_id", post.Id),
mlog.Err(appErrGet),
)
} else if len(existingAcks) > 0 {
// Use batch delete for better performance
if nErr := scs.server.GetStore().PostAcknowledgement().BatchDelete(existingAcks); nErr != nil {
scs.server.Log().Log(mlog.LvlSharedChannelServiceError, "Error batch deleting acknowledgements for remote sync",
mlog.String("post_id", post.Id),
mlog.Int("count", len(existingAcks)),
mlog.Err(nErr),
)
}
}
// Extract all user IDs from acknowledgements for batch processing
userIDs := make([]string, 0, len(acknowledgements))
for _, ack := range acknowledgements {
userIDs = append(userIDs, ack.UserId)
}
// Use batch operation to save all acknowledgements at once
var savedAcks []*model.PostAcknowledgement
if len(userIDs) > 0 {
var appErrAck *model.AppError
savedAcks, appErrAck = scs.app.SaveAcknowledgementsForPost(rctx, post.Id, userIDs)
if appErrAck != nil {
scs.server.Log().Log(mlog.LvlSharedChannelServiceError, "Error syncing remote post acknowledgements",
mlog.String("post_id", post.Id),
mlog.Int("count", len(userIDs)),
mlog.Err(appErrAck),
)
// Fall back to original acknowledgements if batch save fails
savedAcks = acknowledgements
}
}
// Update acknowledgements in the returned post
if rpost.Metadata == nil {
rpost.Metadata = &model.PostMetadata{}
}
rpost.Metadata.Acknowledgements = savedAcks
return rpost
}
func (scs *Service) upsertSyncReaction(reaction *model.Reaction, targetChannel *model.Channel, rc *model.RemoteCluster) (*model.Reaction, error) {
savedReaction := reaction
var appErr *model.AppError
// check that the reaction's post is in the target channel. This ensures the reaction can only be associated with a post
// that is in a channel shared with the remote.
rctx := request.EmptyContext(scs.server.Log())
post, err := scs.server.GetStore().Post().GetSingle(rctx, reaction.PostId, true)
if err != nil {
return nil, fmt.Errorf("error fetching post for reaction sync: %w", err)
}
if post.ChannelId != targetChannel.Id {
return nil, fmt.Errorf("reaction sync failed: %w", ErrChannelIDMismatch)
}
existingReaction, err := scs.server.GetStore().Reaction().GetSingle(reaction.UserId, reaction.PostId, rc.RemoteId, reaction.EmojiName)
if err != nil && !isNotFoundError(err) {
return nil, fmt.Errorf("error fetching reaction for sync: %w", err)
}
if existingReaction == nil {
// reaction does not exist; check that user belongs to remote and create reaction
// this is not done for delete since deletion can be done by admins on the remote
user, err := scs.server.GetStore().User().Get(context.TODO(), reaction.UserId)
if err != nil {
return nil, fmt.Errorf("error fetching user for reaction sync: %w", err)
}
if user.GetRemoteID() != rc.RemoteId {
return nil, fmt.Errorf("reaction sync failed: %w", ErrRemoteIDMismatch)
}
reaction.RemoteId = model.NewPointer(rc.RemoteId)
savedReaction, appErr = scs.app.SaveReactionForPost(request.EmptyContext(scs.server.Log()), reaction)
} else {
// make sure the reaction being deleted is owned by the remote
if existingReaction.GetRemoteID() != rc.RemoteId {
return nil, fmt.Errorf("reaction sync failed: %w", ErrRemoteIDMismatch)
}
appErr = scs.app.DeleteReactionForPost(request.EmptyContext(scs.server.Log()), reaction)
}
var retErr error
if appErr != nil {
retErr = errors.New(appErr.Error())
}
return savedReaction, retErr
}
func (scs *Service) upsertSyncAcknowledgement(acknowledgement *model.PostAcknowledgement, targetChannel *model.Channel, rc *model.RemoteCluster) (*model.PostAcknowledgement, error) {
savedAcknowledgement := acknowledgement
var appErr *model.AppError
// check that the acknowledgement's post is in the target channel. This ensures the acknowledgement can only be associated with a post
// that is in a channel shared with the remote.
rctx := request.EmptyContext(scs.server.Log())
post, err := scs.server.GetStore().Post().GetSingle(rctx, acknowledgement.PostId, true)
if err != nil {
return nil, fmt.Errorf("error fetching post for acknowledgement sync: %w", err)
}
if post.ChannelId != targetChannel.Id {
return nil, fmt.Errorf("acknowledgement sync failed: %w", ErrChannelIDMismatch)
}
existingAcknowledgement, err := scs.server.GetStore().PostAcknowledgement().GetSingle(acknowledgement.UserId, acknowledgement.PostId, rc.RemoteId)
if err != nil && !isNotFoundError(err) {
return nil, fmt.Errorf("error fetching acknowledgement for sync: %w", err)
}
if existingAcknowledgement == nil {
// acknowledgement does not exist; check that user belongs to remote and create acknowledgement
// this is not done for delete since deletion can be done by admins on the remote
user, err := scs.server.GetStore().User().Get(context.TODO(), acknowledgement.UserId)
if err != nil {
return nil, fmt.Errorf("error fetching user for acknowledgement sync: %w", err)
}
if user.GetRemoteID() != rc.RemoteId {
return nil, fmt.Errorf("acknowledgement sync failed: %w", ErrRemoteIDMismatch)
}
acknowledgement.RemoteId = model.NewPointer(rc.RemoteId)
acknowledgement.ChannelId = targetChannel.Id
savedAcknowledgement, appErr = scs.app.SaveAcknowledgementForPostWithModel(request.EmptyContext(scs.server.Log()), acknowledgement)
} else {
// make sure the acknowledgement being deleted is owned by the remote
if existingAcknowledgement.GetRemoteID() != rc.RemoteId {
return nil, fmt.Errorf("acknowledgement sync failed: %w", ErrRemoteIDMismatch)
}
if acknowledgement.AcknowledgedAt == 0 {
// Delete the acknowledgement
appErr = scs.app.DeleteAcknowledgementForPostWithModel(request.EmptyContext(scs.server.Log()), acknowledgement)
}
}
var retErr error
if appErr != nil {
retErr = errors.New(appErr.Error())
}
return savedAcknowledgement, retErr
}
// transformMentionsOnReceive transforms mentions in received posts using explicit mentionTransforms.
func (scs *Service) transformMentionsOnReceive(rctx request.CTX, post *model.Post, targetChannel *model.Channel, rc *model.RemoteCluster, mentionTransforms map[string]string) {
if post.Message == "" || len(mentionTransforms) == 0 {
return
}
// Process mentions directly using mentionTransforms - no need to re-parse with regex
for mention, userID := range mentionTransforms {
oldMention := "@" + mention
var newMention string
// Get the user to determine transformation type
if user, err := scs.server.GetStore().User().Get(context.Background(), userID); err == nil && user != nil {
// User exists in receiver's database
if strings.Contains(mention, ":") {
// Colon mention (e.g., "@admin:remote1") - always use the user's actual username
newMention = "@" + user.Username
} else {
// Simple mention (e.g., "@admin")
if user.GetRemoteID() == "" {
// This is a local user, keep as-is
newMention = "@" + mention
} else {
// This is a remote user that was synced, use their synced username
newMention = "@" + user.Username
}
}
} else {
// User doesn't exist in receiver's database
if strings.Contains(mention, ":") {
// Colon mention for unknown user - keep as-is
newMention = oldMention
} else {
// Simple mention for unknown user - add cluster suffix to indicate it's from remote
newMention = "@" + mention + ":" + rc.Name
}
}
post.Message = strings.ReplaceAll(post.Message, oldMention, newMention)
}
}