1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_DOWNGRADE_SNAPSHOT_MANAGER_H_
#define CHROME_BROWSER_DOWNGRADE_SNAPSHOT_MANAGER_H_
#include <stdint.h>
#include <optional>
#include <vector>
#include "base/files/file_path.h"
#include "base/time/time.h"
#include "base/version.h"
namespace downgrade {
struct SnapshotItemDetails;
// Class that handles saving snapshots of some user data after a browser
// upgrade, and loading the appropriate snapshot after a downgrade.
class SnapshotManager {
public:
// Instantiates a SnapshotManager that will handle taking a snapshot and
// restoring snapshots for the data from |user_data_dir| for the current
// chrome version.
explicit SnapshotManager(const base::FilePath& user_data_dir);
SnapshotManager(const SnapshotManager& other) = delete;
SnapshotManager& operator=(const SnapshotManager&) = delete;
~SnapshotManager();
// Copies specified files from |user_data_dir_| for |version| into the
// appropriate snapshot directory.
void TakeSnapshot(const base::Version& version);
// Restores all the files from the highest available snapshot version that is
// not greater than |version| to |user_data_dir_|. If the highest available
// snapshot version is equal to |version|, the snapshot is moved, otherwise
// it is copied. If the snapshot folder is empty after this operation, it is
// moved for later deletion.
void RestoreSnapshot(const base::Version& version);
// Keeps the number of snapshots on the disk under |max_number_of_snapshots|
// by moving invalid and older snapshots for later deletion. If |milestone| is
// specified, limit the deletion to the snapshots from that milestone.
void PurgeInvalidAndOldSnapshots(int max_number_of_snapshots,
std::optional<uint32_t> milestone) const;
// Deletes snapshot data created after |delete_begin| for |profile_base_name|.
// |remove_mask| (of bits from ChromeBrowsingDataRemoverDelegate::DataType)
// indicates the types of data to be cleared from the profile's snapshots.
void DeleteSnapshotDataForProfile(base::Time delete_begin,
const base::FilePath& profile_base_name,
uint64_t remove_mask);
private:
virtual std::vector<SnapshotItemDetails> GetUserSnapshotItemDetails() const;
virtual std::vector<SnapshotItemDetails> GetProfileSnapshotItemDetails()
const;
const base::FilePath user_data_dir_;
};
} // namespace downgrade
#endif // CHROME_BROWSER_DOWNGRADE_SNAPSHOT_MANAGER_H_
|
