sync/engine/store_timestamps_command.cc

// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "sync/engine/store_timestamps_command.h"

#include "base/logging.h"
#include "sync/sessions/status_controller.h"
#include "sync/sessions/sync_session.h"
#include "sync/syncable/directory.h"

namespace syncer {

ModelTypeSet ProcessNewProgressMarkers(
    const sync_pb::GetUpdatesResponse& response,
    syncable::Directory* dir) {
  ModelTypeSet forward_progress_types;
  // If a marker was omitted for any one type, that indicates no
  // change from the previous state.
  for (int i = 0; i < response.new_progress_marker_size(); ++i) {
    int field_number = response.new_progress_marker(i).data_type_id();
    ModelType model_type = GetModelTypeFromSpecificsFieldNumber(field_number);
    if (!IsRealDataType(model_type)) {
      DLOG(WARNING) << "Unknown field number " << field_number;
      continue;
    }
    forward_progress_types.Put(model_type);
    dir->SetDownloadProgress(model_type, response.new_progress_marker(i));
  }
  return forward_progress_types;
}

StoreTimestampsCommand::StoreTimestampsCommand() {}
StoreTimestampsCommand::~StoreTimestampsCommand() {}

SyncerError StoreTimestampsCommand::ExecuteImpl(
    sessions::SyncSession* session) {
  const sync_pb::GetUpdatesResponse& updates =
      session->status_controller().updates_response().get_updates();

  sessions::StatusController* status = session->mutable_status_controller();

  ModelTypeSet forward_progress_types =
      ProcessNewProgressMarkers(updates, session->context()->directory());
  DCHECK(!forward_progress_types.Empty() ||
         updates.changes_remaining() == 0);
  if (VLOG_IS_ON(1)) {
    DVLOG_IF(1, !forward_progress_types.Empty())
        << "Get Updates got new progress marker for types: "
        << ModelTypeSetToString(forward_progress_types)
        << " out of possible: "
        << ModelTypeSetToString(status->updates_request_types());
  }
  if (updates.has_changes_remaining()) {
    int64 changes_left = updates.changes_remaining();
    DVLOG(1) << "Changes remaining: " << changes_left;
    status->set_num_server_changes_remaining(changes_left);
  }

  return SYNCER_OK;
}

}  // namespace syncer