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
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_OFFLINE_PAGES_CORE_ARCHIVE_MANAGER_H_
#define COMPONENTS_OFFLINE_PAGES_CORE_ARCHIVE_MANAGER_H_
#include "base/files/file_path.h"
#include "base/functional/callback_forward.h"
#include "base/memory/ref_counted.h"
namespace base {
class SequencedTaskRunner;
} // namespace base
namespace offline_pages {
// Class that manages all archive files for offline pages. They are stored in
// different archive directories based on their lifetime types (persistent or
// temporary).
// All tasks are performed using |task_runner_|.
class ArchiveManager {
public:
// Used by metrics collection and clearing storage of temporary pages.
// - |internal_free_disk_space| is the free space of the volume which
// contains temporary and private archive directories.
// - |external_free_disk_space| is the free space of the volume which contains
// public archives directory, in most cases it should be Download directory
// in /sdcard/.
// - |{temporary/private}_archives_size| is the size of the directory. Since
// these are inside app directory and are fully controlled, it's unnecessary
// to calculate the size by iterating and counting.
// - |public_archives_size| will enumerate all mhtml files in the public
// directory and records the total file size. This will include mhtml files
// shared into the public directory through other approaches.
struct StorageStats {
int64_t internal_archives_size() const {
return temporary_archives_size + private_archives_size;
}
int64_t internal_free_disk_space;
int64_t external_free_disk_space;
int64_t temporary_archives_size;
int64_t private_archives_size;
int64_t public_archives_size;
};
typedef base::OnceCallback<void(
const ArchiveManager::StorageStats& storage_stats)>
StorageStatsCallback;
ArchiveManager(const base::FilePath& temporary_archives_dir,
const base::FilePath& private_archives_dir_,
const base::FilePath& public_archives_dir,
const scoped_refptr<base::SequencedTaskRunner>& task_runner);
ArchiveManager(const ArchiveManager&) = delete;
ArchiveManager& operator=(const ArchiveManager&) = delete;
virtual ~ArchiveManager();
// Creates archives directory if one does not exist yet;
virtual void EnsureArchivesDirCreated(base::OnceCallback<void()> callback);
// Gets stats about archive storage, i.e. sizes of all archive directories
// and free disk spaces.
virtual void GetStorageStats(StorageStatsCallback callback) const;
// Gets the archive directories.
const base::FilePath& GetTemporaryArchivesDir() const;
const base::FilePath& GetPrivateArchivesDir() const;
virtual const base::FilePath& GetPublicArchivesDir();
protected:
// Used for testing.
ArchiveManager();
private:
// Path under which all of the temporary archives should be stored.
base::FilePath temporary_archives_dir_;
// Path under which all of the persistent archives should be saved initially.
base::FilePath private_archives_dir_;
// Publically accessible path where archives should be moved once ready.
base::FilePath public_archives_dir_;
// Task runner for running file operations.
// Since the task_runner is a SequencedTaskRunner, it's guaranteed that the
// second task will start after the first one. This is an important assumption
// for |ArchiveManager::EnsureArchivesDirCreated|.
scoped_refptr<base::SequencedTaskRunner> task_runner_;
};
} // namespace offline_pages
#endif // COMPONENTS_OFFLINE_PAGES_CORE_ARCHIVE_MANAGER_H_
|
