[SyncFS] Move SyncFS V1 files from drive_backend to drive_backend_v1

chrome/browser/sync_file_system/drive_backend/remote_change_handler.cc

-// Copyright 2013 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 "chrome/browser/sync_file_system/drive_backend/remote_change_handler.h"
-
-#include "base/logging.h"
-#include "webkit/common/fileapi/file_system_util.h"
-
-namespace sync_file_system {
-
-RemoteChangeHandler::ChangeQueueItem::ChangeQueueItem()
-    : changestamp(0) {}
-
-RemoteChangeHandler::ChangeQueueItem::ChangeQueueItem(
-    int64 changestamp,
-    const fileapi::FileSystemURL& url)
-    : changestamp(changestamp), url(url) {}
-
-bool RemoteChangeHandler::ChangeQueueComparator::operator()(
-    const ChangeQueueItem& left,
-    const ChangeQueueItem& right) {
-  if (left.changestamp != right.changestamp)
-    return left.changestamp < right.changestamp;
-  return fileapi::FileSystemURL::Comparator()(left.url, right.url);
-}
-
-RemoteChangeHandler::RemoteChange::RemoteChange()
-    : changestamp(0),
-      change(FileChange::FILE_CHANGE_ADD_OR_UPDATE, SYNC_FILE_TYPE_UNKNOWN) {}
-
-RemoteChangeHandler::RemoteChange::RemoteChange(
-    int64 changestamp,
-    const std::string& resource_id,
-    const std::string& md5_checksum,
-    const base::Time& updated_time,
-    const fileapi::FileSystemURL& url,
-    const FileChange& change)
-    : changestamp(changestamp),
-      resource_id(resource_id),
-      md5_checksum(md5_checksum),
-      updated_time(updated_time),
-      url(url),
-      change(change) {}
-
-RemoteChangeHandler::RemoteChange::~RemoteChange() {}
-
-bool RemoteChangeHandler::RemoteChangeComparator::operator()(
-    const RemoteChange& left,
-    const RemoteChange& right) {
-  // This should return true if |right| has higher priority than |left|.
-  // Smaller changestamps have higher priorities (i.e. need to be processed
-  // earlier).
-  if (left.changestamp != right.changestamp)
-    return left.changestamp > right.changestamp;
-  return false;
-}
-
-RemoteChangeHandler::RemoteChangeHandler() {}
-
-RemoteChangeHandler::~RemoteChangeHandler() {}
-
-bool RemoteChangeHandler::GetChange(RemoteChange* remote_change) {
-  const fileapi::FileSystemURL& url = changes_.begin()->url;
-  const base::FilePath::StringType& normalized_path =
-      fileapi::VirtualPath::GetNormalizedFilePath(url.path());
-  DCHECK(ContainsKey(origin_to_changes_map_, url.origin()));
-  PathToChangeMap* path_to_change = &origin_to_changes_map_[url.origin()];
-  DCHECK(ContainsKey(*path_to_change, normalized_path));
-  *remote_change = (*path_to_change)[normalized_path].remote_change;
-  return true;
-}
-
-bool RemoteChangeHandler::GetChangeForURL(
-    const fileapi::FileSystemURL& url,
-    RemoteChange* remote_change) {
-  OriginToChangesMap::iterator found_origin =
-      origin_to_changes_map_.find(url.origin());
-  if (found_origin == origin_to_changes_map_.end())
-    return false;
-
-  PathToChangeMap* path_to_change = &found_origin->second;
-  PathToChangeMap::iterator found_change = path_to_change->find(
-      fileapi::VirtualPath::GetNormalizedFilePath(url.path()));
-  if (found_change == path_to_change->end())
-    return false;
-
-  *remote_change = found_change->second.remote_change;
-  return true;
-}
-
-void RemoteChangeHandler::AppendChange(const RemoteChange& remote_change) {
-  base::FilePath::StringType normalized_path =
-      fileapi::VirtualPath::GetNormalizedFilePath(remote_change.url.path());
-
-  PathToChangeMap* path_to_change =
-      &origin_to_changes_map_[remote_change.url.origin()];
-  PathToChangeMap::iterator found = path_to_change->find(normalized_path);
-
-  // Remove an existing change for |remote_change.url.path()|.
-  if (found != path_to_change->end())
-    changes_.erase(found->second.position_in_queue);
-
-  std::pair<PendingChangeQueue::iterator, bool> inserted_to_queue =
-      changes_.insert(ChangeQueueItem(remote_change.changestamp,
-                                      remote_change.url));
-  DCHECK(inserted_to_queue.second);
-
-  (*path_to_change)[normalized_path] =
-      ChangeMapItem(remote_change, inserted_to_queue.first);
-}
-
-bool RemoteChangeHandler::RemoveChangeForURL(
-    const fileapi::FileSystemURL& url) {
-  OriginToChangesMap::iterator found_origin =
-      origin_to_changes_map_.find(url.origin());
-  if (found_origin == origin_to_changes_map_.end())
-    return false;
-
-  PathToChangeMap* path_to_change = &found_origin->second;
-  PathToChangeMap::iterator found_change = path_to_change->find(
-      fileapi::VirtualPath::GetNormalizedFilePath(url.path()));
-  if (found_change == path_to_change->end())
-    return false;
-
-  changes_.erase(found_change->second.position_in_queue);
-  path_to_change->erase(found_change);
-  if (path_to_change->empty())
-    origin_to_changes_map_.erase(found_origin);
-  return true;
-}
-
-void RemoteChangeHandler::RemoveChangesForOrigin(const GURL& origin) {
-  OriginToChangesMap::iterator found = origin_to_changes_map_.find(origin);
-  if (found == origin_to_changes_map_.end())
-    return;
-  for (PathToChangeMap::iterator itr = found->second.begin();
-       itr != found->second.end(); ++itr)
-    changes_.erase(itr->second.position_in_queue);
-  origin_to_changes_map_.erase(found);
-}
-
-bool RemoteChangeHandler::HasChangesForOrigin(const GURL& origin) const {
-  return ContainsKey(origin_to_changes_map_, origin);
-}
-
-RemoteChangeHandler::ChangeMapItem::ChangeMapItem() {}
-
-RemoteChangeHandler::ChangeMapItem::ChangeMapItem(
-    const RemoteChange& remote_change,
-    PendingChangeQueue::iterator position_in_queue)
-  : remote_change(remote_change),
-    position_in_queue(position_in_queue) {}
-
-RemoteChangeHandler::ChangeMapItem::~ChangeMapItem() {}
-
-}  // namespace sync_file_system