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
20namespace iapps {
21
22namespace {
23
24// Try to read the iTunes preferences file from the default location and return
25// its contents if found.
26std::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.
40void 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.
59void 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
70void 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.
91void 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
98