chrome/browser/media_galleries/fileapi/iapps_finder_impl_win.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/iapps_finder_impl.h"
   6
   7 #include <string>
   8
   9 #include "base/base_paths_win.h"
  10 #include "base/files/file_path.h"
  11 #include "base/files/file_util.h"
  12 #include "base/logging.h"
  13 #include "base/path_service.h"
  14 #include "chrome/browser/media_galleries/fileapi/iapps_finder.h"
  15 #include "chrome/browser/media_galleries/fileapi/safe_itunes_pref_parser_win.h"
  16 #include "chrome/common/chrome_paths.h"
  17 #include "components/storage_monitor/storage_info.h"
  18 #include "content/public/browser/browser_thread.h"
  19
  20 namespace iapps {
  21
  22 namespace {
  23
  24 // Try to read the iTunes preferences file from the default location and return
  25 // its contents if found.
  26 std::string GetPrefFileData() {
  27   std::string xml_pref_data;
  28
  29   base::FilePath appdata_dir;
  30   if (PathService::Get(base::DIR_APP_DATA, &appdata_dir)) {
  31     base::FilePath pref_file = appdata_dir.AppendASCII("Apple Computer")
  32                                           .AppendASCII("iTunes")
  33                                           .AppendASCII("iTunesPrefs.xml");
  34     base::ReadFileToString(pref_file, &xml_pref_data);
  35   }
  36   return xml_pref_data;
  37 }
  38
  39 // Check the default location for a correctly named file.
  40 void TryDefaultLocation(const iapps::IAppsFinderCallback& callback) {
  41   DCHECK_CURRENTLY_ON(content::BrowserThread::FILE);
  42
  43   base::FilePath music_dir;
  44   if (!PathService::Get(chrome::DIR_USER_MUSIC, &music_dir)) {
  45     callback.Run(std::string());
  46     return;
  47   }
  48   base::FilePath library_file =
  49       music_dir.AppendASCII("iTunes").AppendASCII("iTunes Music Library.xml");
  50
  51   if (!base::PathExists(library_file)) {
  52     callback.Run(std::string());
  53     return;
  54   }
  55   callback.Run(library_file.AsUTF8Unsafe());
  56 }
  57
  58 // Check the location that parsing the preferences XML file found.
  59 void FinishedParsingPrefXML(const iapps::IAppsFinderCallback& callback,
  60                             const base::FilePath& library_file) {
  61   DCHECK_CURRENTLY_ON(content::BrowserThread::FILE);
  62
  63   if (library_file.empty() || !base::PathExists(library_file)) {
  64     TryDefaultLocation(callback);
  65     return;
  66   }
  67   callback.Run(library_file.AsUTF8Unsafe());
  68 }
  69
  70 void FindITunesLibraryOnFileThread(const iapps::IAppsFinderCallback& callback) {
  71   DCHECK_CURRENTLY_ON(content::BrowserThread::FILE);
  72
  73   std::string xml_pref_data = GetPrefFileData();
  74   if (xml_pref_data.empty()) {
  75     TryDefaultLocation(callback);
  76     return;
  77   }
  78
  79   scoped_refptr<itunes::SafeITunesPrefParserWin> parser =
  80       new itunes::SafeITunesPrefParserWin(
  81           xml_pref_data,
  82           base::Bind(&FinishedParsingPrefXML, callback));
  83   parser->Start();
  84 }
  85
  86 }  // namespace
  87
  88 // The Windows-specific ITunesFinder uses a utility process to parse the
  89 // iTunes preferences XML file if it exists. If not or if the parsing fails,
  90 // ITunesFinderWin will try a default location as well.
  91 void FindITunesLibrary(const IAppsFinderCallback& callback) {
  92   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
  93   FindIAppsOnFileThread(storage_monitor::StorageInfo::ITUNES,
  94                         base::Bind(FindITunesLibraryOnFileThread), callback);
  95 }
  96
  97 }  // namespace iapps