feat_: Add sync chat endpoint

protocol/messenger_chats.go

@@ -633,3 +633,24 @@ func (m *Messenger) clearHistory(id string) (*MessengerResponse, error) {
 	response.AddChat(chat)
 	return response, nil
 }
+
+func (m *Messenger) SyncChat(request *requests.SyncChat) error {
+
+	if err := request.Validate(); err != nil {
+		return err
+	}
+
+	id := request.ID
+
+	chat, ok := m.allChats.Load(id)
+	if !ok {
+		return ErrChatNotFound
+	}
+
+	_, err := m.SyncChatOneMonth(chat.ID)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}

protocol/messenger_mailserver.go

@@ -945,3 +945,53 @@ func (m *Messenger) ConnectionChanged(state connection.State) {
 
 	m.connectionState = state
 }
+
+func (m *Messenger) SyncChatOneMonth(chatID string) (uint32, error) {
+	to := uint32(m.getTimesource().GetCurrentTime() / 1000)
+	from := to - oneMonthInSeconds
+	_, err := m.performMailserverRequest(func() (*MessengerResponse, error) {
+		pubsubTopic, topics, err := m.topicsForChat(chatID)
+		if err != nil {
+			return nil, nil
+		}
+
+		chat, ok := m.allChats.Load(chatID)
+		if !ok {
+			return nil, ErrChatNotFound
+		}
+
+		batch := MailserverBatch{
+			ChatIDs:     []string{chatID},
+			From:        from,
+			To:          to,
+			PubsubTopic: pubsubTopic,
+			Topics:      topics,
+		}
+		if m.config.messengerSignalsHandler != nil {
+			m.config.messengerSignalsHandler.HistoryRequestStarted(1)
+		}
+
+		err = m.processMailserverBatch(batch)
+		if err != nil {
+			return nil, err
+		}
+
+		if m.config.messengerSignalsHandler != nil {
+			m.config.messengerSignalsHandler.HistoryRequestCompleted()
+		}
+		if chat.SyncedFrom == 0 || chat.SyncedFrom > batch.From {
+			chat.SyncedFrom = batch.From
+		}
+
+		m.logger.Debug("setting sync timestamps", zap.Int64("from", int64(batch.From)), zap.Int64("to", int64(chat.SyncedTo)), zap.String("chatID", chatID))
+
+		err = m.persistence.SetSyncTimestamps(batch.From, chat.SyncedTo, chat.ID)
+		from = batch.From
+		return nil, err
+	})
+	if err != nil {
+		return 0, err
+	}
+
+	return from, nil
+}

protocol/requests/sync_chat.go

@@ -0,0 +1,19 @@
+package requests
+
+import (
+	"errors"
+)
+
+var ErrSyncChatInvalidID = errors.New("sync-chat: invalid id")
+
+type SyncChat struct {
+	ID string `json:"id"`
+}
+
+func (c *SyncChat) Validate() error {
+	if len(c.ID) == 0 {
+		return ErrSyncChatInvalidID
+	}
+
+	return nil
+}

services/ext/api.go

@@ -1681,6 +1681,10 @@ func (api *PublicAPI) PromoteSelfToControlMode(communityID string) error {
 	return err
 }
 
+func (api *PublicAPI) SyncChat(request *requests.SyncChat) error {
+	return api.service.messenger.SyncChat(request)
+}
+
 // -----
 // HELPER
 // -----