src/chrome/browser/media_galleries/fileapi/iapps_finder_impl_mac.mm

   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 "base/bind.h"
   8 #include "base/files/file_util.h"
   9 #include "base/logging.h"
  10 #import "base/mac/foundation_util.h"
  11 #import "base/mac/scoped_nsobject.h"
  12 #include "base/strings/sys_string_conversions.h"
  13 #include "base/time/time.h"
  14 #include "components/policy/core/common/preferences_mac.h"
  15 #include "components/storage_monitor/storage_info.h"
  16 #include "content/public/browser/browser_thread.h"
  17
  18 using base::mac::CFCast;
  19 using base::mac::CFToNSCast;
  20 using base::mac::NSToCFCast;
  21
  22 namespace iapps {
  23
  24 namespace {
  25
  26 typedef base::Callback<base::FilePath(NSString*)> PListPathExtractor;
  27
  28 static MacPreferences* g_test_mac_preferences = NULL;
  29
  30 void FindMostRecentDatabase(
  31     base::scoped_nsobject<NSString> recent_databases_key,
  32     const PListPathExtractor& path_extractor,
  33     const IAppsFinderCallback& callback) {
  34   DCHECK_CURRENTLY_ON(content::BrowserThread::FILE);
  35
  36   scoped_ptr<MacPreferences> real_preferences;
  37   MacPreferences* prefs = g_test_mac_preferences;
  38   if (!prefs) {
  39     real_preferences.reset(new MacPreferences());
  40     prefs = real_preferences.get();
  41   }
  42
  43   CFStringRef iapp_id = CFSTR("com.apple.iApps");
  44   base::scoped_nsobject<NSArray> plist(CFToNSCast(CFCast<CFArrayRef>(
  45       prefs->CopyAppValue(NSToCFCast(recent_databases_key.get()), iapp_id))));
  46   if (!plist) {
  47     callback.Run(std::string());
  48     return;
  49   }
  50
  51   // Find the most recently used database from the list of database paths. Most
  52   // of the time |plist| has a size of 1.
  53   base::Time most_recent_db_time;
  54   base::FilePath most_recent_db_path;
  55   for (NSString* path_ns in plist.get()) {
  56     base::FilePath db_path = path_extractor.Run(path_ns);
  57     if (db_path.empty())
  58       continue;
  59
  60     base::File::Info file_info;
  61     if (!base::GetFileInfo(db_path, &file_info))
  62       continue;
  63
  64     // In case of two databases with the same modified time, tie breaker goes
  65     // to the first one on the list.
  66     if (file_info.last_modified <= most_recent_db_time)
  67       continue;
  68
  69     most_recent_db_time = file_info.last_modified;
  70     most_recent_db_path = db_path;
  71   }
  72   callback.Run(most_recent_db_path.value());
  73 }
  74
  75 base::FilePath ExtractIPhotoPath(NSString* path_ns) {
  76   NSURL* url = [NSURL URLWithString:path_ns];
  77   if (![url isFileURL])
  78     return base::FilePath();
  79
  80   NSString* expanded_path_ns = [url path];
  81   return base::mac::NSStringToFilePath(expanded_path_ns);
  82 }
  83
  84 base::FilePath ExtractITunesPath(NSString* path_ns) {
  85   NSString* expanded_path_ns = [path_ns stringByExpandingTildeInPath];
  86   return base::mac::NSStringToFilePath(expanded_path_ns);
  87 };
  88
  89 }  // namespace
  90
  91 NSString* const kIPhotoRecentDatabasesKey = @"iPhotoRecentDatabases";
  92 NSString* const kITunesRecentDatabasePathsKey = @"iTunesRecentDatabasePaths";
  93
  94 void FindIPhotoLibrary(const IAppsFinderCallback& callback) {
  95   FindIAppsOnFileThread(
  96       storage_monitor::StorageInfo::IPHOTO,
  97       base::Bind(&FindMostRecentDatabase,
  98                  base::scoped_nsobject<NSString>(kIPhotoRecentDatabasesKey),
  99                  base::Bind(&ExtractIPhotoPath)),
 100       callback);
 101 }
 102
 103 void FindITunesLibrary(const IAppsFinderCallback& callback) {
 104   FindIAppsOnFileThread(
 105       storage_monitor::StorageInfo::ITUNES,
 106       base::Bind(&FindMostRecentDatabase,
 107                  base::scoped_nsobject<NSString>(kITunesRecentDatabasePathsKey),
 108                  base::Bind(&ExtractITunesPath)),
 109       callback);
 110 }
 111
 112 void SetMacPreferencesForTesting(MacPreferences* preferences) {
 113   g_test_mac_preferences = preferences;
 114 }
 115
 116 NSArray* NSArrayFromFilePath(const base::FilePath& path) {
 117   NSString* url =
 118       [[NSURL fileURLWithPath:base::SysUTF8ToNSString(path.value())]
 119           absoluteString];
 120   return [NSArray arrayWithObject:url];
 121 }
 122
 123 }  // namespace iapps