conflict_resolver.h revision a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7 
1// Copyright 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_CONFLICT_RESOLVER_H_
6#define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_CONFLICT_RESOLVER_H_
7
8#include <string>
9#include <vector>
10
11#include "base/memory/scoped_ptr.h"
12#include "base/memory/weak_ptr.h"
13#include "chrome/browser/sync_file_system/sync_callbacks.h"
14#include "chrome/browser/sync_file_system/sync_task.h"
15#include "google_apis/drive/gdata_errorcode.h"
16
17namespace drive {
18class DriveServiceInterface;
19}
20
21namespace google_apis {
22class ResourceEntry;
23}
24
25namespace sync_file_system {
26namespace drive_backend {
27
28class MetadataDatabase;
29class SyncEngineContext;
30class TrackerSet;
31
32// Resolves server side file confliction.
33// If a remote file has an active tracker and multiple managed parents,
34// ConflictResolver detaches the file from all parents other than the parent
35// of the active tracker.
36// If multiple trackers have the same local path or the same remote file,
37// ConflictResolver picks up one of them and delete others.
38class ConflictResolver : public SyncTask {
39 public:
40  explicit ConflictResolver(SyncEngineContext* sync_context);
41  virtual ~ConflictResolver();
42  virtual void Run(const SyncStatusCallback& callback) OVERRIDE;
43
44 private:
45  typedef std::pair<std::string, std::string> FileIDAndETag;
46
47  void DetachFromNonPrimaryParents(const SyncStatusCallback& callback);
48  void DidDetachFromParent(const SyncStatusCallback& callback,
49                           google_apis::GDataErrorCode error);
50
51  std::string PickPrimaryFile(const TrackerSet& trackers);
52  void RemoveNonPrimaryFiles(const SyncStatusCallback& callback);
53  void DidRemoveFile(const SyncStatusCallback& callback,
54                     const std::string& file_id,
55                     google_apis::GDataErrorCode error);
56
57  std::string target_file_id_;
58  std::vector<std::string> parents_to_remove_;
59
60  std::vector<FileIDAndETag> non_primary_file_ids_;
61
62  bool IsContextReady();
63  drive::DriveServiceInterface* drive_service();
64  MetadataDatabase* metadata_database();
65
66  SyncEngineContext* sync_context_;  // Not owned.
67
68  base::WeakPtrFactory<ConflictResolver> weak_ptr_factory_;
69
70  DISALLOW_COPY_AND_ASSIGN(ConflictResolver);
71};
72
73}  // namespace drive_backend
74}  // namespace sync_file_system
75
76#endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_CONFLICT_RESOLVER_H_
77