chrome/browser/media_galleries/fileapi/picasa_finder.cc

   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/browser/storage_monitor/storage_info.h"
  17 #include "chrome/common/media_galleries/picasa_types.h"
  18 #include "content/public/browser/browser_thread.h"
  19
  20 #if defined(OS_WIN)
  21 #include "base/win/registry.h"
  22 #endif
  23
  24 namespace picasa {
  25
  26 #if defined(OS_WIN)
  27 const wchar_t kPicasaRegistryPath[] =
  28     L"Software\\Google\\Picasa\\Picasa2\\Preferences";
  29 const wchar_t kPicasaRegistryAppDataPathKey[] = L"AppLocalDataPath";
  30 #endif
  31
  32 namespace {
  33
  34 #if defined(OS_WIN)
  35 base::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
  51 base::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)
  60 base::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.
  70 base::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
  85 void 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
  97 void 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
 105 base::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