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_CHROMEOS_DRIVE_DEBUG_INFO_COLLECTOR_H_
6#define CHROME_BROWSER_CHROMEOS_DRIVE_DEBUG_INFO_COLLECTOR_H_
7
8#include "base/basictypes.h"
9#include "base/callback_forward.h"
10#include "chrome/browser/chromeos/drive/file_system_interface.h"
11
12namespace drive {
13
14// This class provides some methods which are useful to show the debug
15// info on chrome://drive-internals page.
16// All the method should be called on UI thread.
17class DebugInfoCollector {
18 public:
19  // Callback for ReadDirectory().
20  typedef base::Callback<void(FileError error,
21                              scoped_ptr<ResourceEntryVector> entries)>
22      ReadDirectoryCallback;
23
24  // Callback for IterateFileCache().
25  typedef base::Callback<void(const std::string& id,
26                              const FileCacheEntry& cache_entry)>
27      IterateFileCacheCallback;
28
29  DebugInfoCollector(internal::ResourceMetadata* metadata,
30                     FileSystemInterface* file_system,
31                     base::SequencedTaskRunner* blocking_task_runner);
32  ~DebugInfoCollector();
33
34  // Finds a locally stored entry (a file or a directory) by |file_path|.
35  // |callback| must not be null.
36  void GetResourceEntry(const base::FilePath& file_path,
37                        const GetResourceEntryCallback& callback);
38
39  // Finds and reads a directory by |file_path|.
40  // |callback| must not be null.
41  void ReadDirectory(const base::FilePath& file_path,
42                     const ReadDirectoryCallback& callback);
43
44
45  // Iterates all files in the file cache and calls |iteration_callback| for
46  // each file. |completion_callback| is run upon completion.
47  // |iteration_callback| and |completion_callback| must not be null.
48  void IterateFileCache(const IterateFileCacheCallback& iteration_callback,
49                        const base::Closure& completion_callback);
50
51  // Returns miscellaneous metadata of the file system like the largest
52  // timestamp. |callback| must not be null.
53  void GetMetadata(const GetFilesystemMetadataCallback& callback);
54
55 private:
56  internal::ResourceMetadata* metadata_;  // No owned.
57  FileSystemInterface* file_system_;  // Not owned.
58  scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
59
60  DISALLOW_COPY_AND_ASSIGN(DebugInfoCollector);
61};
62
63}  // namespace drive
64
65#endif  // CHROME_BROWSER_CHROMEOS_DRIVE_DEBUG_INFO_COLLECTOR_H_
66