picasa_finder.cc revision 5d1f7b1de12d16ceb2c938c56701a3e8bfa558f7 
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#include "chrome/browser/media_galleries/fileapi/picasa_finder.h"
6
7#if defined(OS_WIN)
8#include <windows.h>
9#endif
10
11#include "base/base_paths.h"
12#include "base/bind.h"
13#include "base/file_util.h"
14#include "base/path_service.h"
15#include "base/strings/string16.h"
16#include "chrome/common/media_galleries/picasa_types.h"
17#include "components/storage_monitor/storage_info.h"
18#include "content/public/browser/browser_thread.h"
19
20#if defined(OS_WIN)
21#include "base/win/registry.h"
22#endif
23
24namespace picasa {
25
26#if defined(OS_WIN)
27const wchar_t kPicasaRegistryPath[] =
28    L"Software\\Google\\Picasa\\Picasa2\\Preferences";
29const wchar_t kPicasaRegistryAppDataPathKey[] = L"AppLocalDataPath";
30#endif
31
32namespace {
33
34#if defined(OS_WIN)
35base::FilePath GetCustomPicasaAppDataPathFromWinRegistry() {
36  base::win::RegKey key;
37  if (key.Open(HKEY_CURRENT_USER, kPicasaRegistryPath, KEY_READ) !=
38          ERROR_SUCCESS || !key.Valid()) {
39    return base::FilePath();
40  }
41
42  base::string16 value;
43  if (key.ReadValue(kPicasaRegistryAppDataPathKey, &value) != ERROR_SUCCESS)
44    return base::FilePath();
45  if (value.empty())
46    return base::FilePath();
47
48  return base::FilePath(value);
49}
50
51base::FilePath GetPicasaDatabasePath() {
52  base::FilePath path = GetCustomPicasaAppDataPathFromWinRegistry();
53  if (path.empty() && !PathService::Get(base::DIR_LOCAL_APP_DATA, &path))
54    return base::FilePath();
55  return MakePicasaDatabasePath(path);
56}
57#endif  // OS_WIN
58
59#if defined(OS_MACOSX)
60base::FilePath GetPicasaDatabasePath() {
61  base::FilePath path = GetCustomPicasaAppDataPathFromMacPreferences();
62  if (path.empty() && !PathService::Get(base::DIR_APP_DATA, &path))
63    return base::FilePath();
64  return MakePicasaDatabasePath(path);
65}
66#endif  // OS_MACOSX
67
68// Returns path of Picasa's DB3 database directory. May only be called on
69// threads that allow for disk IO, like the FILE thread or MediaTaskRunner.
70base::FilePath FindPicasaDatabaseOnFileThread() {
71  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::FILE));
72
73#if defined(OS_WIN) || defined(OS_MACOSX)
74   base::FilePath path = GetPicasaDatabasePath();
75   // Verify actual existence
76   if (!base::DirectoryExists(path))
77     path.clear();
78
79   return path;
80#else
81   return base::FilePath();
82#endif
83}
84
85void FinishOnOriginalThread(const DeviceIDCallback& callback,
86                            const base::FilePath& database_path) {
87  std::string device_id;
88  if (!database_path.empty()) {
89    device_id = StorageInfo::MakeDeviceId(StorageInfo::PICASA,
90                                          database_path.AsUTF8Unsafe());
91  }
92  callback.Run(device_id);
93}
94
95}  // namespace
96
97void FindPicasaDatabase(const DeviceIDCallback& callback) {
98  content::BrowserThread::PostTaskAndReplyWithResult(
99      content::BrowserThread::FILE,
100      FROM_HERE,
101      base::Bind(&FindPicasaDatabaseOnFileThread),
102      base::Bind(&FinishOnOriginalThread, callback));
103}
104
105base::FilePath MakePicasaDatabasePath(
106    const base::FilePath& picasa_app_data_path) {
107#if defined(OS_WIN)
108  return picasa_app_data_path.AppendASCII("Google").AppendASCII("Picasa2")
109      .AppendASCII(kPicasaDatabaseDirName);
110#elif defined(OS_MACOSX)
111  return picasa_app_data_path.AppendASCII("Google").AppendASCII("Picasa3")
112      .AppendASCII(kPicasaDatabaseDirName);
113#else
114  return base::FilePath();
115#endif
116}
117
118}  // namespace picasa
119