src/chrome/browser/media_galleries/media_galleries_preferences.cc

   1 // Copyright (c) 2012 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/media_galleries_preferences.h"
   6
   7 #include "base/base_paths_posix.h"
   8 #include "base/callback.h"
   9 #include "base/i18n/time_formatting.h"
  10 #include "base/path_service.h"
  11 #include "base/prefs/pref_service.h"
  12 #include "base/prefs/scoped_user_pref_update.h"
  13 #include "base/stl_util.h"
  14 #include "base/strings/string16.h"
  15 #include "base/strings/string_number_conversions.h"
  16 #include "base/strings/utf_string_conversions.h"
  17 #include "base/values.h"
  18 #include "chrome/browser/browser_process.h"
  19 #include "chrome/browser/extensions/api/media_galleries_private/media_galleries_private_api.h"
  20 #include "chrome/browser/extensions/extension_service.h"
  21 #include "chrome/browser/media_galleries/fileapi/iapps_finder.h"
  22 #include "chrome/browser/media_galleries/fileapi/picasa_finder.h"
  23 #include "chrome/browser/media_galleries/imported_media_gallery_registry.h"
  24 #include "chrome/browser/media_galleries/media_file_system_registry.h"
  25 #include "chrome/browser/media_galleries/media_galleries_histograms.h"
  26 #include "chrome/browser/profiles/profile.h"
  27 #include "chrome/common/chrome_paths.h"
  28 #include "chrome/common/pref_names.h"
  29 #include "chrome/grit/generated_resources.h"
  30 #include "components/crx_file/id_util.h"
  31 #include "components/pref_registry/pref_registry_syncable.h"
  32 #include "components/storage_monitor/media_storage_util.h"
  33 #include "components/storage_monitor/storage_monitor.h"
  34 #include "content/public/browser/browser_thread.h"
  35 #include "extensions/browser/extension_prefs.h"
  36 #include "extensions/browser/extension_system.h"
  37 #include "extensions/browser/pref_names.h"
  38 #include "extensions/common/extension_set.h"
  39 #include "extensions/common/permissions/api_permission.h"
  40 #include "extensions/common/permissions/media_galleries_permission.h"
  41 #include "extensions/common/permissions/permissions_data.h"
  42 #include "ui/base/l10n/l10n_util.h"
  43
  44 using base::DictionaryValue;
  45 using base::ListValue;
  46 using extensions::ExtensionPrefs;
  47 using storage_monitor::MediaStorageUtil;
  48 using storage_monitor::StorageInfo;
  49 using storage_monitor::StorageMonitor;
  50
  51 namespace {
  52
  53 // Pref key for the list of media gallery permissions.
  54 const char kMediaGalleriesPermissions[] = "media_galleries_permissions";
  55 // Pref key for Media Gallery ID.
  56 const char kMediaGalleryIdKey[] = "id";
  57 // Pref key for Media Gallery Permission Value.
  58 const char kMediaGalleryHasPermissionKey[] = "has_permission";
  59
  60 const char kMediaGalleriesDeviceIdKey[] = "deviceId";
  61 const char kMediaGalleriesDisplayNameKey[] = "displayName";
  62 const char kMediaGalleriesPathKey[] = "path";
  63 const char kMediaGalleriesPrefIdKey[] = "prefId";
  64 const char kMediaGalleriesTypeKey[] = "type";
  65 const char kMediaGalleriesVolumeLabelKey[] = "volumeLabel";
  66 const char kMediaGalleriesVendorNameKey[] = "vendorName";
  67 const char kMediaGalleriesModelNameKey[] = "modelName";
  68 const char kMediaGalleriesSizeKey[] = "totalSize";
  69 const char kMediaGalleriesLastAttachTimeKey[] = "lastAttachTime";
  70 const char kMediaGalleriesScanAudioCountKey[] = "audioCount";
  71 const char kMediaGalleriesScanImageCountKey[] = "imageCount";
  72 const char kMediaGalleriesScanVideoCountKey[] = "videoCount";
  73
  74 const char kMediaGalleriesTypeAutoDetectedValue[] = "autoDetected";
  75 const char kMediaGalleriesTypeBlackListedValue[] = "blackListed";
  76 const char kMediaGalleriesTypeRemovedScanValue[] = "removedScan";
  77 const char kMediaGalleriesTypeScanResultValue[] = "scanResult";
  78 const char kMediaGalleriesTypeUserAddedValue[] = "userAdded";
  79
  80 const char kMediaGalleriesDefaultGalleryTypeNotDefaultValue[] = "notDefault";
  81 const char kMediaGalleriesDefaultGalleryTypeMusicDefaultValue[] = "music";
  82 const char kMediaGalleriesDefaultGalleryTypePicturesDefaultValue[] = "pictures";
  83 const char kMediaGalleriesDefaultGalleryTypeVideosDefaultValue[] = "videos";
  84
  85 const char kIPhotoGalleryName[] = "iPhoto";
  86 const char kITunesGalleryName[] = "iTunes";
  87 const char kPicasaGalleryName[] = "Picasa";
  88
  89 const int kCurrentPrefsVersion = 3;
  90
  91 int NumberExtensionsUsingMediaGalleries(Profile* profile) {
  92   int count = 0;
  93   if (!profile)
  94     return count;
  95   ExtensionService* extension_service =
  96       extensions::ExtensionSystem::Get(profile)->extension_service();
  97   if (!extension_service)
  98     return count;
  99
 100   const extensions::ExtensionSet* extensions = extension_service->extensions();
 101   for (extensions::ExtensionSet::const_iterator i = extensions->begin();
 102        i != extensions->end(); ++i) {
 103     const extensions::PermissionsData* permissions_data =
 104         (*i)->permissions_data();
 105     if (permissions_data->HasAPIPermission(
 106             extensions::APIPermission::kMediaGalleries) ||
 107         permissions_data->HasAPIPermission(
 108             extensions::APIPermission::kMediaGalleriesPrivate)) {
 109       count++;
 110     }
 111   }
 112   return count;
 113 }
 114
 115 bool GetPrefId(const base::DictionaryValue& dict, MediaGalleryPrefId* value) {
 116   std::string string_id;
 117   if (!dict.GetString(kMediaGalleriesPrefIdKey, &string_id) ||
 118       !base::StringToUint64(string_id, value)) {
 119     return false;
 120   }
 121
 122   return true;
 123 }
 124
 125 bool GetType(const base::DictionaryValue& dict,
 126              MediaGalleryPrefInfo::Type* type) {
 127   std::string string_type;
 128   if (!dict.GetString(kMediaGalleriesTypeKey, &string_type))
 129     return false;
 130
 131   if (string_type == kMediaGalleriesTypeUserAddedValue) {
 132     *type = MediaGalleryPrefInfo::kUserAdded;
 133     return true;
 134   }
 135   if (string_type == kMediaGalleriesTypeAutoDetectedValue) {
 136     *type = MediaGalleryPrefInfo::kAutoDetected;
 137     return true;
 138   }
 139   if (string_type == kMediaGalleriesTypeBlackListedValue) {
 140     *type = MediaGalleryPrefInfo::kBlackListed;
 141     return true;
 142   }
 143   if (string_type == kMediaGalleriesTypeScanResultValue) {
 144     *type = MediaGalleryPrefInfo::kScanResult;
 145     return true;
 146   }
 147   if (string_type == kMediaGalleriesTypeRemovedScanValue) {
 148     *type = MediaGalleryPrefInfo::kRemovedScan;
 149     return true;
 150   }
 151
 152   return false;
 153 }
 154
 155 const char* TypeToStringValue(MediaGalleryPrefInfo::Type type) {
 156   const char* result = NULL;
 157   switch (type) {
 158     case MediaGalleryPrefInfo::kUserAdded:
 159       result = kMediaGalleriesTypeUserAddedValue;
 160       break;
 161     case MediaGalleryPrefInfo::kAutoDetected:
 162       result = kMediaGalleriesTypeAutoDetectedValue;
 163       break;
 164     case MediaGalleryPrefInfo::kBlackListed:
 165       result = kMediaGalleriesTypeBlackListedValue;
 166       break;
 167     case MediaGalleryPrefInfo::kScanResult:
 168       result = kMediaGalleriesTypeScanResultValue;
 169       break;
 170     case MediaGalleryPrefInfo::kRemovedScan:
 171       result = kMediaGalleriesTypeRemovedScanValue;
 172       break;
 173     default:
 174       NOTREACHED();
 175       break;
 176   }
 177   return result;
 178 }
 179
 180 MediaGalleryPrefInfo::DefaultGalleryType GetDefaultGalleryType(
 181     const base::DictionaryValue& dict) {
 182   std::string default_gallery_type_string;
 183   if (!dict.GetString(
 184           kMediaGalleriesDefaultGalleryTypeKey, &default_gallery_type_string))
 185     return MediaGalleryPrefInfo::kNotDefault;
 186
 187   if (default_gallery_type_string ==
 188       kMediaGalleriesDefaultGalleryTypeMusicDefaultValue) {
 189     return MediaGalleryPrefInfo::kMusicDefault;
 190   }
 191   if (default_gallery_type_string ==
 192       kMediaGalleriesDefaultGalleryTypePicturesDefaultValue) {
 193     return MediaGalleryPrefInfo::kPicturesDefault;
 194   }
 195   if (default_gallery_type_string ==
 196       kMediaGalleriesDefaultGalleryTypeVideosDefaultValue) {
 197     return MediaGalleryPrefInfo::kVideosDefault;
 198   }
 199   return MediaGalleryPrefInfo::kNotDefault;
 200 }
 201
 202 const char* DefaultGalleryTypeToStringValue(
 203     MediaGalleryPrefInfo::DefaultGalleryType default_gallery_type) {
 204   const char* result = NULL;
 205   switch (default_gallery_type) {
 206     case MediaGalleryPrefInfo::kNotDefault:
 207       result = kMediaGalleriesDefaultGalleryTypeNotDefaultValue;
 208       break;
 209     case MediaGalleryPrefInfo::kMusicDefault:
 210       result = kMediaGalleriesDefaultGalleryTypeMusicDefaultValue;
 211       break;
 212     case MediaGalleryPrefInfo::kPicturesDefault:
 213       result = kMediaGalleriesDefaultGalleryTypePicturesDefaultValue;
 214       break;
 215     case MediaGalleryPrefInfo::kVideosDefault:
 216       result = kMediaGalleriesDefaultGalleryTypeVideosDefaultValue;
 217       break;
 218     default:
 219       NOTREACHED();
 220       break;
 221   }
 222   return result;
 223 }
 224
 225 bool PopulateGalleryPrefInfoFromDictionary(
 226     const base::DictionaryValue& dict, MediaGalleryPrefInfo* out_gallery_info) {
 227   MediaGalleryPrefId pref_id;
 228   base::string16 display_name;
 229   std::string device_id;
 230   base::FilePath::StringType path;
 231   MediaGalleryPrefInfo::Type type = MediaGalleryPrefInfo::kInvalidType;
 232   base::string16 volume_label;
 233   base::string16 vendor_name;
 234   base::string16 model_name;
 235   double total_size_in_bytes = 0.0;
 236   double last_attach_time = 0.0;
 237   bool volume_metadata_valid = false;
 238   int audio_count = 0;
 239   int image_count = 0;
 240   int video_count = 0;
 241   int prefs_version = 0;
 242
 243   if (!GetPrefId(dict, &pref_id) ||
 244       !dict.GetString(kMediaGalleriesDeviceIdKey, &device_id) ||
 245       !dict.GetString(kMediaGalleriesPathKey, &path) ||
 246       !GetType(dict, &type)) {
 247     return false;
 248   }
 249
 250   dict.GetString(kMediaGalleriesDisplayNameKey, &display_name);
 251   dict.GetInteger(kMediaGalleriesPrefsVersionKey, &prefs_version);
 252
 253   if (dict.GetString(kMediaGalleriesVolumeLabelKey, &volume_label) &&
 254       dict.GetString(kMediaGalleriesVendorNameKey, &vendor_name) &&
 255       dict.GetString(kMediaGalleriesModelNameKey, &model_name) &&
 256       dict.GetDouble(kMediaGalleriesSizeKey, &total_size_in_bytes) &&
 257       dict.GetDouble(kMediaGalleriesLastAttachTimeKey, &last_attach_time)) {
 258     volume_metadata_valid = true;
 259   }
 260
 261   if (dict.GetInteger(kMediaGalleriesScanAudioCountKey, &audio_count) &&
 262       dict.GetInteger(kMediaGalleriesScanImageCountKey, &image_count) &&
 263       dict.GetInteger(kMediaGalleriesScanVideoCountKey, &video_count)) {
 264     out_gallery_info->audio_count = audio_count;
 265     out_gallery_info->image_count = image_count;
 266     out_gallery_info->video_count = video_count;
 267   } else {
 268     out_gallery_info->audio_count = 0;
 269     out_gallery_info->image_count = 0;
 270     out_gallery_info->video_count = 0;
 271   }
 272
 273   out_gallery_info->pref_id = pref_id;
 274   out_gallery_info->display_name = display_name;
 275   out_gallery_info->device_id = device_id;
 276   out_gallery_info->path = base::FilePath(path);
 277   out_gallery_info->type = type;
 278   out_gallery_info->volume_label = volume_label;
 279   out_gallery_info->vendor_name = vendor_name;
 280   out_gallery_info->model_name = model_name;
 281   out_gallery_info->total_size_in_bytes = total_size_in_bytes;
 282   out_gallery_info->last_attach_time =
 283       base::Time::FromInternalValue(last_attach_time);
 284   out_gallery_info->volume_metadata_valid = volume_metadata_valid;
 285   out_gallery_info->prefs_version = prefs_version;
 286   out_gallery_info->default_gallery_type = GetDefaultGalleryType(dict);
 287   return true;
 288 }
 289
 290 base::DictionaryValue* CreateGalleryPrefInfoDictionary(
 291     const MediaGalleryPrefInfo& gallery) {
 292   base::DictionaryValue* dict = new base::DictionaryValue();
 293   dict->SetString(kMediaGalleriesPrefIdKey,
 294                   base::Uint64ToString(gallery.pref_id));
 295   dict->SetString(kMediaGalleriesDeviceIdKey, gallery.device_id);
 296   dict->SetString(kMediaGalleriesPathKey, gallery.path.value());
 297   dict->SetString(kMediaGalleriesTypeKey, TypeToStringValue(gallery.type));
 298
 299   if (gallery.default_gallery_type != MediaGalleryPrefInfo::kNotDefault) {
 300     dict->SetString(kMediaGalleriesDefaultGalleryTypeKey,
 301                     DefaultGalleryTypeToStringValue(
 302                         gallery.default_gallery_type));
 303   }
 304
 305   if (gallery.volume_metadata_valid) {
 306     dict->SetString(kMediaGalleriesVolumeLabelKey, gallery.volume_label);
 307     dict->SetString(kMediaGalleriesVendorNameKey, gallery.vendor_name);
 308     dict->SetString(kMediaGalleriesModelNameKey, gallery.model_name);
 309     dict->SetDouble(kMediaGalleriesSizeKey, gallery.total_size_in_bytes);
 310     dict->SetDouble(kMediaGalleriesLastAttachTimeKey,
 311                     gallery.last_attach_time.ToInternalValue());
 312   } else {
 313     dict->SetString(kMediaGalleriesDisplayNameKey, gallery.display_name);
 314   }
 315
 316   if (gallery.audio_count || gallery.image_count || gallery.video_count) {
 317     dict->SetInteger(kMediaGalleriesScanAudioCountKey, gallery.audio_count);
 318     dict->SetInteger(kMediaGalleriesScanImageCountKey, gallery.image_count);
 319     dict->SetInteger(kMediaGalleriesScanVideoCountKey, gallery.video_count);
 320   }
 321
 322   // Version 0 of the prefs format was that the display_name was always
 323   // used to show the user-visible name of the gallery. Version 1 means
 324   // that there is an optional display_name, and when it is present, it
 325   // overrides the name that would be built from the volume metadata, path,
 326   // or whatever other data. So if we see a display_name with version 0, it
 327   // means it may be overwritten simply by getting new volume metadata.
 328   // A display_name with version 1 should not be overwritten.
 329   dict->SetInteger(kMediaGalleriesPrefsVersionKey, gallery.prefs_version);
 330
 331   return dict;
 332 }
 333
 334 bool HasAutoDetectedGalleryPermission(const extensions::Extension& extension) {
 335   extensions::MediaGalleriesPermission::CheckParam param(
 336       extensions::MediaGalleriesPermission::kAllAutoDetectedPermission);
 337   return extension.permissions_data()->CheckAPIPermissionWithParam(
 338       extensions::APIPermission::kMediaGalleries, &param);
 339 }
 340
 341 // Retrieves the MediaGalleryPermission from the given dictionary; DCHECKs on
 342 // failure.
 343 bool GetMediaGalleryPermissionFromDictionary(
 344     const base::DictionaryValue* dict,
 345     MediaGalleryPermission* out_permission) {
 346   std::string string_id;
 347   if (dict->GetString(kMediaGalleryIdKey, &string_id) &&
 348       base::StringToUint64(string_id, &out_permission->pref_id) &&
 349       dict->GetBoolean(kMediaGalleryHasPermissionKey,
 350                        &out_permission->has_permission)) {
 351     return true;
 352   }
 353   NOTREACHED();
 354   return false;
 355 }
 356
 357 // For a device with |device_name| and a relative path |sub_folder|, construct
 358 // a display name. If |sub_folder| is empty, then just return |device_name|.
 359 base::string16 GetDisplayNameForSubFolder(const base::string16& device_name,
 360                                           const base::FilePath& sub_folder) {
 361   if (sub_folder.empty())
 362     return device_name;
 363   return (sub_folder.BaseName().LossyDisplayName() +
 364           base::ASCIIToUTF16(" - ") +
 365           device_name);
 366 }
 367
 368 void InitializeImportedMediaGalleryRegistryOnFileThread() {
 369   DCHECK_CURRENTLY_ON(content::BrowserThread::FILE);
 370   ImportedMediaGalleryRegistry::GetInstance()->Initialize();
 371 }
 372
 373 }  // namespace
 374
 375 MediaGalleryPrefInfo::MediaGalleryPrefInfo()
 376     : pref_id(kInvalidMediaGalleryPrefId),
 377       type(kInvalidType),
 378       total_size_in_bytes(0),
 379       volume_metadata_valid(false),
 380       audio_count(0),
 381       image_count(0),
 382       video_count(0),
 383       default_gallery_type(kNotDefault),
 384       prefs_version(0) {
 385 }
 386
 387 MediaGalleryPrefInfo::~MediaGalleryPrefInfo() {}
 388
 389 base::FilePath MediaGalleryPrefInfo::AbsolutePath() const {
 390   base::FilePath base_path = MediaStorageUtil::FindDevicePathById(device_id);
 391   DCHECK(!path.IsAbsolute());
 392   return base_path.empty() ? base_path : base_path.Append(path);
 393 }
 394
 395 bool MediaGalleryPrefInfo::IsBlackListedType() const {
 396   return type == kBlackListed || type == kRemovedScan;
 397 }
 398
 399 base::string16 MediaGalleryPrefInfo::GetGalleryDisplayName() const {
 400   if (!StorageInfo::IsRemovableDevice(device_id)) {
 401     // For fixed storage, the default name is the fully qualified directory
 402     // name, or in the case of a root directory, the root directory name.
 403     // Exception: ChromeOS -- the full pathname isn't visible there, so only
 404     // the directory name is used.
 405     base::FilePath path = AbsolutePath();
 406     if (!display_name.empty())
 407       return display_name;
 408
 409 #if defined(OS_CHROMEOS)
 410     // See chrome/browser/chromeos/fileapi/file_system_backend.cc
 411     base::FilePath download_path;
 412     if (PathService::Get(chrome::DIR_DEFAULT_DOWNLOADS_SAFE, &download_path)) {
 413       base::FilePath relative;
 414       if (download_path.AppendRelativePath(path, &relative))
 415         return relative.LossyDisplayName();
 416     }
 417     return path.BaseName().LossyDisplayName();
 418 #else
 419     return path.LossyDisplayName();
 420 #endif
 421   }
 422
 423   StorageInfo info(device_id,
 424                    MediaStorageUtil::FindDevicePathById(device_id).value(),
 425                    volume_label, vendor_name, model_name, total_size_in_bytes);
 426   base::string16 name = info.GetDisplayNameWithOverride(display_name, true);
 427   if (!path.empty())
 428     name = GetDisplayNameForSubFolder(name, path);
 429   return name;
 430 }
 431
 432 base::string16 MediaGalleryPrefInfo::GetGalleryTooltip() const {
 433   return AbsolutePath().LossyDisplayName();
 434 }
 435
 436 base::string16 MediaGalleryPrefInfo::GetGalleryAdditionalDetails() const {
 437   base::string16 attached;
 438   if (StorageInfo::IsRemovableDevice(device_id)) {
 439     if (MediaStorageUtil::IsRemovableStorageAttached(device_id)) {
 440       attached = l10n_util::GetStringUTF16(
 441           IDS_MEDIA_GALLERIES_DIALOG_DEVICE_ATTACHED);
 442     } else if (!last_attach_time.is_null()) {
 443       attached = l10n_util::GetStringFUTF16(
 444           IDS_MEDIA_GALLERIES_LAST_ATTACHED,
 445           base::TimeFormatShortDateNumeric(last_attach_time));
 446     } else {
 447       attached = l10n_util::GetStringUTF16(
 448           IDS_MEDIA_GALLERIES_DIALOG_DEVICE_NOT_ATTACHED);
 449     }
 450   }
 451
 452   return attached;
 453 }
 454
 455 bool MediaGalleryPrefInfo::IsGalleryAvailable() const {
 456   return !StorageInfo::IsRemovableDevice(device_id) ||
 457          MediaStorageUtil::IsRemovableStorageAttached(device_id);
 458 }
 459
 460 MediaGalleriesPreferences::GalleryChangeObserver::~GalleryChangeObserver() {}
 461
 462 MediaGalleriesPreferences::MediaGalleriesPreferences(Profile* profile)
 463     : initialized_(false),
 464       pre_initialization_callbacks_waiting_(0),
 465       profile_(profile),
 466       extension_prefs_for_testing_(NULL),
 467       weak_factory_(this) {
 468 }
 469
 470 MediaGalleriesPreferences::~MediaGalleriesPreferences() {
 471   if (StorageMonitor::GetInstance())
 472     StorageMonitor::GetInstance()->RemoveObserver(this);
 473 }
 474
 475 void MediaGalleriesPreferences::EnsureInitialized(base::Closure callback) {
 476   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 477
 478   if (IsInitialized()) {
 479     if (!callback.is_null())
 480       callback.Run();
 481     return;
 482   }
 483
 484   on_initialize_callbacks_.push_back(callback);
 485   if (on_initialize_callbacks_.size() > 1)
 486     return;
 487
 488   // This counter must match the number of async methods dispatched below.
 489   // It cannot be incremented inline with each callback, as some may return
 490   // synchronously, decrement the counter to 0, and prematurely trigger
 491   // FinishInitialization.
 492   pre_initialization_callbacks_waiting_ = 4;
 493
 494   // Check whether we should be initializing -- are there any extensions that
 495   // are using media galleries?
 496   media_galleries::UsageCount(media_galleries::PREFS_INITIALIZED);
 497   if (NumberExtensionsUsingMediaGalleries(profile_) == 0) {
 498     media_galleries::UsageCount(media_galleries::PREFS_INITIALIZED_ERROR);
 499   }
 500
 501   // We determine the freshness of the profile here, before any of the finders
 502   // return and add media galleries to it (hence why the APIHasBeenUsed check
 503   // needs to happen here rather than inside OnStorageMonitorInit itself).
 504   StorageMonitor::GetInstance()->EnsureInitialized(
 505       base::Bind(&MediaGalleriesPreferences::OnStorageMonitorInit,
 506                  weak_factory_.GetWeakPtr(),
 507                  APIHasBeenUsed(profile_)));
 508
 509   // Look for optional default galleries every time.
 510   iapps::FindITunesLibrary(
 511       base::Bind(&MediaGalleriesPreferences::OnFinderDeviceID,
 512                  weak_factory_.GetWeakPtr()));
 513
 514   picasa::FindPicasaDatabase(
 515       base::Bind(&MediaGalleriesPreferences::OnFinderDeviceID,
 516                  weak_factory_.GetWeakPtr()));
 517
 518   iapps::FindIPhotoLibrary(
 519       base::Bind(&MediaGalleriesPreferences::OnFinderDeviceID,
 520                  weak_factory_.GetWeakPtr()));
 521 }
 522
 523 bool MediaGalleriesPreferences::IsInitialized() const { return initialized_; }
 524
 525 Profile* MediaGalleriesPreferences::profile() { return profile_; }
 526
 527 void MediaGalleriesPreferences::OnInitializationCallbackReturned() {
 528   DCHECK(!IsInitialized());
 529   DCHECK_GT(pre_initialization_callbacks_waiting_, 0);
 530   if (--pre_initialization_callbacks_waiting_ == 0)
 531     FinishInitialization();
 532 }
 533
 534 void MediaGalleriesPreferences::FinishInitialization() {
 535   DCHECK(!IsInitialized());
 536
 537   initialized_ = true;
 538
 539   StorageMonitor* monitor = StorageMonitor::GetInstance();
 540   DCHECK(monitor->IsInitialized());
 541
 542   InitFromPrefs();
 543
 544   StorageMonitor::GetInstance()->AddObserver(this);
 545
 546   std::vector<StorageInfo> existing_devices =
 547       monitor->GetAllAvailableStorages();
 548   for (size_t i = 0; i < existing_devices.size(); i++) {
 549     if (!(StorageInfo::IsMediaDevice(existing_devices[i].device_id()) &&
 550           StorageInfo::IsRemovableDevice(existing_devices[i].device_id())))
 551       continue;
 552     AddGallery(existing_devices[i].device_id(),
 553                base::FilePath(),
 554                MediaGalleryPrefInfo::kAutoDetected,
 555                existing_devices[i].storage_label(),
 556                existing_devices[i].vendor_name(),
 557                existing_devices[i].model_name(),
 558                existing_devices[i].total_size_in_bytes(),
 559                base::Time::Now(), 0, 0, 0);
 560   }
 561
 562   for (std::vector<base::Closure>::iterator iter =
 563            on_initialize_callbacks_.begin();
 564        iter != on_initialize_callbacks_.end();
 565        ++iter) {
 566     iter->Run();
 567   }
 568   on_initialize_callbacks_.clear();
 569 }
 570
 571 void MediaGalleriesPreferences::AddDefaultGalleries() {
 572   const struct DefaultTypes {
 573     int directory_key;
 574     MediaGalleryPrefInfo::DefaultGalleryType default_gallery_type;
 575   } kDirectories[] = {
 576     {chrome::DIR_USER_MUSIC, MediaGalleryPrefInfo::kMusicDefault},
 577     {chrome::DIR_USER_PICTURES, MediaGalleryPrefInfo::kPicturesDefault},
 578     {chrome::DIR_USER_VIDEOS, MediaGalleryPrefInfo::kVideosDefault},
 579   };
 580
 581   for (size_t i = 0; i < arraysize(kDirectories); ++i) {
 582     base::FilePath path;
 583     if (!PathService::Get(kDirectories[i].directory_key, &path))
 584       continue;
 585
 586     base::FilePath relative_path;
 587     StorageInfo info;
 588     if (MediaStorageUtil::GetDeviceInfoFromPath(path, &info, &relative_path)) {
 589       MediaGalleryPrefInfo::DefaultGalleryType default_gallery_type =
 590           kDirectories[i].default_gallery_type;
 591       DCHECK_NE(default_gallery_type, MediaGalleryPrefInfo::kNotDefault);
 592
 593       AddOrUpdateGalleryInternal(
 594           info.device_id(),
 595           base::string16(),
 596           relative_path,
 597           MediaGalleryPrefInfo::kAutoDetected,
 598           info.storage_label(),
 599           info.vendor_name(),
 600           info.model_name(),
 601           info.total_size_in_bytes(),
 602           base::Time(),
 603           true,
 604           0,
 605           0,
 606           0,
 607           kCurrentPrefsVersion,
 608           default_gallery_type);
 609     }
 610   }
 611 }
 612
 613 bool MediaGalleriesPreferences::UpdateDeviceIDForSingletonType(
 614     const std::string& device_id) {
 615   StorageInfo::Type singleton_type;
 616   if (!StorageInfo::CrackDeviceId(device_id, &singleton_type, NULL))
 617     return false;
 618
 619   PrefService* prefs = profile_->GetPrefs();
 620   scoped_ptr<ListPrefUpdate> update(new ListPrefUpdate(
 621       prefs, prefs::kMediaGalleriesRememberedGalleries));
 622   base::ListValue* list = update->Get();
 623   for (base::ListValue::iterator iter = list->begin();
 624        iter != list->end(); ++iter) {
 625     // All of these calls should succeed, but preferences file can be corrupt.
 626     base::DictionaryValue* dict;
 627     if (!(*iter)->GetAsDictionary(&dict))
 628       continue;
 629     std::string this_device_id;
 630     if (!dict->GetString(kMediaGalleriesDeviceIdKey, &this_device_id))
 631       continue;
 632     if (this_device_id == device_id)
 633       return true;  // No update is necessary.
 634     StorageInfo::Type device_type;
 635     if (!StorageInfo::CrackDeviceId(this_device_id, &device_type, NULL))
 636       continue;
 637
 638     if (device_type == singleton_type) {
 639       dict->SetString(kMediaGalleriesDeviceIdKey, device_id);
 640       update.reset();  // commits the update.
 641       InitFromPrefs();
 642       MediaGalleryPrefId pref_id;
 643       if (GetPrefId(*dict, &pref_id)) {
 644         FOR_EACH_OBSERVER(GalleryChangeObserver,
 645                           gallery_change_observers_,
 646                           OnGalleryInfoUpdated(this, pref_id));
 647       }
 648       return true;
 649     }
 650   }
 651   return false;
 652 }
 653
 654 void MediaGalleriesPreferences::OnStorageMonitorInit(
 655     bool api_has_been_used) {
 656   if (api_has_been_used)
 657     UpdateDefaultGalleriesPaths();
 658
 659   // Invoke this method even if the API has been used before, in order to ensure
 660   // we upgrade (migrate) prefs for galleries with prefs version prior to 3.
 661   AddDefaultGalleries();
 662
 663   OnInitializationCallbackReturned();
 664 }
 665
 666 void MediaGalleriesPreferences::OnFinderDeviceID(const std::string& device_id) {
 667   if (!device_id.empty()) {
 668     std::string gallery_name;
 669     if (StorageInfo::IsIPhotoDevice(device_id))
 670       gallery_name = kIPhotoGalleryName;
 671     else if (StorageInfo::IsITunesDevice(device_id))
 672       gallery_name = kITunesGalleryName;
 673     else if (StorageInfo::IsPicasaDevice(device_id))
 674       gallery_name = kPicasaGalleryName;
 675
 676     if (!gallery_name.empty()) {
 677       pre_initialization_callbacks_waiting_++;
 678       content::BrowserThread::PostTaskAndReply(
 679           content::BrowserThread::FILE,
 680           FROM_HERE,
 681           base::Bind(&InitializeImportedMediaGalleryRegistryOnFileThread),
 682           base::Bind(
 683               &MediaGalleriesPreferences::OnInitializationCallbackReturned,
 684               weak_factory_.GetWeakPtr()));
 685     }
 686
 687     if (!UpdateDeviceIDForSingletonType(device_id)) {
 688       DCHECK(!gallery_name.empty());
 689       AddOrUpdateGalleryInternal(
 690           device_id,
 691           base::ASCIIToUTF16(gallery_name),
 692           base::FilePath(),
 693           MediaGalleryPrefInfo::kAutoDetected,
 694           base::string16(),
 695           base::string16(),
 696           base::string16(),
 697           0,
 698           base::Time(),
 699           false,
 700           0,
 701           0,
 702           0,
 703           kCurrentPrefsVersion,
 704           MediaGalleryPrefInfo::kNotDefault);
 705     }
 706   }
 707
 708   OnInitializationCallbackReturned();
 709 }
 710
 711 void MediaGalleriesPreferences::InitFromPrefs() {
 712   known_galleries_.clear();
 713   device_map_.clear();
 714
 715   PrefService* prefs = profile_->GetPrefs();
 716   const base::ListValue* list = prefs->GetList(
 717       prefs::kMediaGalleriesRememberedGalleries);
 718   if (list) {
 719     for (base::ListValue::const_iterator it = list->begin();
 720          it != list->end(); ++it) {
 721       const base::DictionaryValue* dict = NULL;
 722       if (!(*it)->GetAsDictionary(&dict))
 723         continue;
 724
 725       MediaGalleryPrefInfo gallery_info;
 726       if (!PopulateGalleryPrefInfoFromDictionary(*dict, &gallery_info))
 727         continue;
 728
 729       known_galleries_[gallery_info.pref_id] = gallery_info;
 730       device_map_[gallery_info.device_id].insert(gallery_info.pref_id);
 731     }
 732   }
 733 }
 734
 735 void MediaGalleriesPreferences::AddGalleryChangeObserver(
 736     GalleryChangeObserver* observer) {
 737   DCHECK(IsInitialized());
 738   gallery_change_observers_.AddObserver(observer);
 739 }
 740
 741 void MediaGalleriesPreferences::RemoveGalleryChangeObserver(
 742     GalleryChangeObserver* observer) {
 743   DCHECK(IsInitialized());
 744   gallery_change_observers_.RemoveObserver(observer);
 745 }
 746
 747 void MediaGalleriesPreferences::OnRemovableStorageAttached(
 748     const StorageInfo& info) {
 749   DCHECK(IsInitialized());
 750   if (!StorageInfo::IsMediaDevice(info.device_id()))
 751     return;
 752
 753   AddGallery(info.device_id(), base::FilePath(),
 754              MediaGalleryPrefInfo::kAutoDetected, info.storage_label(),
 755              info.vendor_name(), info.model_name(), info.total_size_in_bytes(),
 756              base::Time::Now(), 0, 0, 0);
 757 }
 758
 759 bool MediaGalleriesPreferences::LookUpGalleryByPath(
 760     const base::FilePath& path,
 761     MediaGalleryPrefInfo* gallery_info) const {
 762   DCHECK(IsInitialized());
 763
 764   // First check if the path matches an imported gallery.
 765   for (MediaGalleriesPrefInfoMap::const_iterator it =
 766            known_galleries_.begin(); it != known_galleries_.end(); ++it) {
 767     const std::string& device_id = it->second.device_id;
 768     if (iapps::PathIndicatesIPhotoLibrary(device_id, path) ||
 769         iapps::PathIndicatesITunesLibrary(device_id, path)) {
 770       *gallery_info = it->second;
 771       return true;
 772     }
 773   }
 774
 775   StorageInfo info;
 776   base::FilePath relative_path;
 777   if (!MediaStorageUtil::GetDeviceInfoFromPath(path, &info, &relative_path)) {
 778     if (gallery_info)
 779       *gallery_info = MediaGalleryPrefInfo();
 780     return false;
 781   }
 782
 783   relative_path = relative_path.NormalizePathSeparators();
 784   MediaGalleryPrefIdSet galleries_on_device =
 785       LookUpGalleriesByDeviceId(info.device_id());
 786   for (MediaGalleryPrefIdSet::const_iterator it = galleries_on_device.begin();
 787        it != galleries_on_device.end();
 788        ++it) {
 789     const MediaGalleryPrefInfo& gallery = known_galleries_.find(*it)->second;
 790     if (gallery.path != relative_path)
 791       continue;
 792
 793     if (gallery_info)
 794       *gallery_info = gallery;
 795     return true;
 796   }
 797
 798   // This method is called by controller::FilesSelected when the user
 799   // adds a new gallery. Control reaches here when the selected gallery is
 800   // on a volume we know about, but have no gallery already for. Returns
 801   // hypothetical data to the caller about what the prefs will look like
 802   // if the gallery is added.
 803   // TODO(gbillock): split this out into another function so it doesn't
 804   // conflate LookUp.
 805   if (gallery_info) {
 806     gallery_info->pref_id = kInvalidMediaGalleryPrefId;
 807     gallery_info->device_id = info.device_id();
 808     gallery_info->path = relative_path;
 809     gallery_info->type = MediaGalleryPrefInfo::kInvalidType;
 810     gallery_info->volume_label = info.storage_label();
 811     gallery_info->vendor_name = info.vendor_name();
 812     gallery_info->model_name = info.model_name();
 813     gallery_info->total_size_in_bytes = info.total_size_in_bytes();
 814     gallery_info->last_attach_time = base::Time::Now();
 815     gallery_info->volume_metadata_valid = true;
 816     gallery_info->prefs_version = kCurrentPrefsVersion;
 817   }
 818   return false;
 819 }
 820
 821 MediaGalleryPrefIdSet MediaGalleriesPreferences::LookUpGalleriesByDeviceId(
 822     const std::string& device_id) const {
 823   DeviceIdPrefIdsMap::const_iterator found = device_map_.find(device_id);
 824   if (found == device_map_.end())
 825     return MediaGalleryPrefIdSet();
 826   return found->second;
 827 }
 828
 829 base::FilePath MediaGalleriesPreferences::LookUpGalleryPathForExtension(
 830     MediaGalleryPrefId gallery_id,
 831     const extensions::Extension* extension,
 832     bool include_unpermitted_galleries) {
 833   DCHECK(IsInitialized());
 834   DCHECK(extension);
 835   if (!include_unpermitted_galleries &&
 836       !ContainsKey(GalleriesForExtension(*extension), gallery_id))
 837     return base::FilePath();
 838
 839   MediaGalleriesPrefInfoMap::const_iterator it =
 840       known_galleries_.find(gallery_id);
 841   if (it == known_galleries_.end())
 842     return base::FilePath();
 843   return MediaStorageUtil::FindDevicePathById(it->second.device_id);
 844 }
 845
 846 MediaGalleryPrefId MediaGalleriesPreferences::AddGallery(
 847     const std::string& device_id,
 848     const base::FilePath& relative_path,
 849     MediaGalleryPrefInfo::Type type,
 850     const base::string16& volume_label,
 851     const base::string16& vendor_name,
 852     const base::string16& model_name,
 853     uint64 total_size_in_bytes,
 854     base::Time last_attach_time,
 855     int audio_count,
 856     int image_count,
 857     int video_count) {
 858   DCHECK(IsInitialized());
 859   return AddOrUpdateGalleryInternal(
 860       device_id,
 861       base::string16(),
 862       relative_path,
 863       type,
 864       volume_label,
 865       vendor_name,
 866       model_name,
 867       total_size_in_bytes,
 868       last_attach_time,
 869       true,
 870       audio_count,
 871       image_count,
 872       video_count,
 873       kCurrentPrefsVersion,
 874       MediaGalleryPrefInfo::kNotDefault);
 875 }
 876
 877 MediaGalleryPrefId MediaGalleriesPreferences::AddOrUpdateGalleryInternal(
 878     const std::string& device_id, const base::string16& display_name,
 879     const base::FilePath& relative_path, MediaGalleryPrefInfo::Type type,
 880     const base::string16& volume_label, const base::string16& vendor_name,
 881     const base::string16& model_name, uint64 total_size_in_bytes,
 882     base::Time last_attach_time, bool volume_metadata_valid,
 883     int audio_count, int image_count, int video_count, int prefs_version,
 884     MediaGalleryPrefInfo::DefaultGalleryType default_gallery_type) {
 885   DCHECK(type == MediaGalleryPrefInfo::kUserAdded ||
 886          type == MediaGalleryPrefInfo::kAutoDetected ||
 887          type == MediaGalleryPrefInfo::kScanResult);
 888   base::FilePath normalized_relative_path =
 889       relative_path.NormalizePathSeparators();
 890   MediaGalleryPrefIdSet galleries_on_device =
 891     LookUpGalleriesByDeviceId(device_id);
 892
 893   for (MediaGalleryPrefIdSet::const_iterator pref_id_it =
 894            galleries_on_device.begin();
 895        pref_id_it != galleries_on_device.end();
 896        ++pref_id_it) {
 897     const MediaGalleryPrefInfo& existing =
 898         known_galleries_.find(*pref_id_it)->second;
 899     if (existing.path != normalized_relative_path)
 900       continue;
 901
 902     bool update_gallery_type = false;
 903     MediaGalleryPrefInfo::Type new_type = existing.type;
 904     if (type == MediaGalleryPrefInfo::kUserAdded) {
 905       if (existing.type == MediaGalleryPrefInfo::kBlackListed) {
 906         new_type = MediaGalleryPrefInfo::kAutoDetected;
 907         update_gallery_type = true;
 908       }
 909       if (existing.type == MediaGalleryPrefInfo::kRemovedScan) {
 910         new_type = MediaGalleryPrefInfo::kUserAdded;
 911         update_gallery_type = true;
 912       }
 913     }
 914
 915     // Status quo: In M27 and M28, galleries added manually use version 0,
 916     // and galleries added automatically (including default galleries) use
 917     // version 1. The name override is used by default galleries as well
 918     // as all device attach events.
 919     // We want to upgrade the name if the existing version is < 2. Leave it
 920     // alone if the existing display name is set with version >= 2 and the
 921     // proposed new name is empty.
 922     bool update_gallery_name = existing.display_name != display_name;
 923     if (existing.prefs_version >= 2 && !existing.display_name.empty() &&
 924         display_name.empty()) {
 925       update_gallery_name = false;
 926     }
 927
 928     // Version 3 adds the default_gallery_type field.
 929     bool update_default_gallery_type =
 930          existing.prefs_version <= 2 &&
 931          default_gallery_type != existing.default_gallery_type;
 932
 933     bool update_gallery_metadata = volume_metadata_valid &&
 934         ((existing.volume_label != volume_label) ||
 935          (existing.vendor_name != vendor_name) ||
 936          (existing.model_name != model_name) ||
 937          (existing.total_size_in_bytes != total_size_in_bytes) ||
 938          (existing.last_attach_time != last_attach_time));
 939
 940     bool update_scan_counts =
 941       new_type != MediaGalleryPrefInfo::kRemovedScan &&
 942       new_type != MediaGalleryPrefInfo::kBlackListed &&
 943       (audio_count > 0 || image_count > 0 || video_count > 0 ||
 944        existing.audio_count || existing.image_count || existing.video_count);
 945
 946     if (!update_gallery_name && !update_gallery_type &&
 947         !update_gallery_metadata && !update_scan_counts &&
 948         !update_default_gallery_type)
 949       return *pref_id_it;
 950
 951     PrefService* prefs = profile_->GetPrefs();
 952     scoped_ptr<ListPrefUpdate> update(
 953         new ListPrefUpdate(prefs, prefs::kMediaGalleriesRememberedGalleries));
 954     base::ListValue* list = update->Get();
 955
 956     for (base::ListValue::const_iterator list_iter = list->begin();
 957          list_iter != list->end();
 958          ++list_iter) {
 959       base::DictionaryValue* dict;
 960       MediaGalleryPrefId iter_id;
 961       if ((*list_iter)->GetAsDictionary(&dict) &&
 962           GetPrefId(*dict, &iter_id) &&
 963           *pref_id_it == iter_id) {
 964         if (update_gallery_type)
 965           dict->SetString(kMediaGalleriesTypeKey, TypeToStringValue(new_type));
 966         if (update_gallery_name)
 967           dict->SetString(kMediaGalleriesDisplayNameKey, display_name);
 968         if (update_gallery_metadata) {
 969           dict->SetString(kMediaGalleriesVolumeLabelKey, volume_label);
 970           dict->SetString(kMediaGalleriesVendorNameKey, vendor_name);
 971           dict->SetString(kMediaGalleriesModelNameKey, model_name);
 972           dict->SetDouble(kMediaGalleriesSizeKey, total_size_in_bytes);
 973           dict->SetDouble(kMediaGalleriesLastAttachTimeKey,
 974                           last_attach_time.ToInternalValue());
 975         }
 976         if (update_scan_counts) {
 977           dict->SetInteger(kMediaGalleriesScanAudioCountKey, audio_count);
 978           dict->SetInteger(kMediaGalleriesScanImageCountKey, image_count);
 979           dict->SetInteger(kMediaGalleriesScanVideoCountKey, video_count);
 980         }
 981         if (update_default_gallery_type) {
 982           dict->SetString(
 983               kMediaGalleriesDefaultGalleryTypeKey,
 984               DefaultGalleryTypeToStringValue(default_gallery_type));
 985         }
 986         dict->SetInteger(kMediaGalleriesPrefsVersionKey, prefs_version);
 987         break;
 988       }
 989     }
 990
 991     // Commits the prefs update.
 992     update.reset();
 993
 994     InitFromPrefs();
 995     FOR_EACH_OBSERVER(GalleryChangeObserver, gallery_change_observers_,
 996                       OnGalleryInfoUpdated(this, *pref_id_it));
 997     return *pref_id_it;
 998   }
 999
1000   PrefService* prefs = profile_->GetPrefs();
1001
1002   MediaGalleryPrefInfo gallery_info;
1003   gallery_info.pref_id = prefs->GetUint64(prefs::kMediaGalleriesUniqueId);
1004   prefs->SetUint64(prefs::kMediaGalleriesUniqueId, gallery_info.pref_id + 1);
1005   gallery_info.display_name = display_name;
1006   gallery_info.device_id = device_id;
1007   gallery_info.path = normalized_relative_path;
1008   gallery_info.type = type;
1009   gallery_info.volume_label = volume_label;
1010   gallery_info.vendor_name = vendor_name;
1011   gallery_info.model_name = model_name;
1012   gallery_info.total_size_in_bytes = total_size_in_bytes;
1013   gallery_info.last_attach_time = last_attach_time;
1014   gallery_info.volume_metadata_valid = volume_metadata_valid;
1015   gallery_info.audio_count = audio_count;
1016   gallery_info.image_count = image_count;
1017   gallery_info.video_count = video_count;
1018   gallery_info.prefs_version = prefs_version;
1019   gallery_info.default_gallery_type = default_gallery_type;
1020
1021   {
1022     ListPrefUpdate update(prefs, prefs::kMediaGalleriesRememberedGalleries);
1023     base::ListValue* list = update.Get();
1024     list->Append(CreateGalleryPrefInfoDictionary(gallery_info));
1025   }
1026   InitFromPrefs();
1027   FOR_EACH_OBSERVER(GalleryChangeObserver,
1028                     gallery_change_observers_,
1029                     OnGalleryAdded(this, gallery_info.pref_id));
1030
1031   return gallery_info.pref_id;
1032 }
1033
1034
1035 void MediaGalleriesPreferences::UpdateDefaultGalleriesPaths() {
1036   base::FilePath music_path;
1037   base::FilePath pictures_path;
1038   base::FilePath videos_path;
1039   bool got_music_path = PathService::Get(chrome::DIR_USER_MUSIC, &music_path);
1040   bool got_pictures_path =
1041       PathService::Get(chrome::DIR_USER_PICTURES, &pictures_path);
1042   bool got_videos_path =
1043       PathService::Get(chrome::DIR_USER_VIDEOS, &videos_path);
1044
1045   PrefService* prefs = profile_->GetPrefs();
1046   scoped_ptr<ListPrefUpdate> update(new ListPrefUpdate(
1047       prefs, prefs::kMediaGalleriesRememberedGalleries));
1048   base::ListValue* list = update->Get();
1049
1050   std::vector<MediaGalleryPrefId> pref_ids;
1051
1052   for (base::ListValue::iterator iter = list->begin();
1053        iter != list->end();
1054        ++iter) {
1055     base::DictionaryValue* dict;
1056     MediaGalleryPrefId pref_id;
1057
1058     if (!((*iter)->GetAsDictionary(&dict) && GetPrefId(*dict, &pref_id)))
1059       continue;
1060
1061     std::string default_gallery_type_string;
1062
1063     // If the "default gallery type" key is set, just update the paths in place.
1064     // If it's not set, then AddOrUpdateGalleryInternal will take care of
1065     // setting it as part of migration to prefs version 3.
1066     if (dict->GetString(kMediaGalleriesDefaultGalleryTypeKey,
1067                         &default_gallery_type_string)) {
1068       std::string device_id;
1069       if (got_music_path &&
1070           default_gallery_type_string ==
1071               kMediaGalleriesDefaultGalleryTypeMusicDefaultValue) {
1072         device_id = StorageInfo::MakeDeviceId(
1073             StorageInfo::Type::FIXED_MASS_STORAGE,
1074             music_path.AsUTF8Unsafe());
1075       } else if (got_pictures_path &&
1076                  default_gallery_type_string ==
1077                      kMediaGalleriesDefaultGalleryTypePicturesDefaultValue) {
1078         device_id = StorageInfo::MakeDeviceId(
1079             StorageInfo::Type::FIXED_MASS_STORAGE,
1080             pictures_path.AsUTF8Unsafe());
1081       } else if (got_videos_path &&
1082                  default_gallery_type_string ==
1083                      kMediaGalleriesDefaultGalleryTypeVideosDefaultValue) {
1084         device_id = StorageInfo::MakeDeviceId(
1085             StorageInfo::Type::FIXED_MASS_STORAGE,
1086             videos_path.AsUTF8Unsafe());
1087       }
1088
1089       if (!device_id.empty())
1090         dict->SetString(kMediaGalleriesDeviceIdKey, device_id);
1091     }
1092
1093     pref_ids.push_back(pref_id);
1094   }
1095
1096   // Commit the prefs update.
1097   update.reset();
1098   InitFromPrefs();
1099
1100   for (std::vector<MediaGalleryPrefId>::iterator iter = pref_ids.begin();
1101        iter != pref_ids.end();
1102        ++iter) {
1103     FOR_EACH_OBSERVER(GalleryChangeObserver,
1104                       gallery_change_observers_,
1105                       OnGalleryInfoUpdated(this, *iter));
1106   }
1107 }
1108
1109
1110 MediaGalleryPrefId MediaGalleriesPreferences::AddGalleryByPath(
1111     const base::FilePath& path, MediaGalleryPrefInfo::Type type) {
1112   DCHECK(IsInitialized());
1113   MediaGalleryPrefInfo gallery_info;
1114   if (LookUpGalleryByPath(path, &gallery_info) &&
1115       !gallery_info.IsBlackListedType()) {
1116     return gallery_info.pref_id;
1117   }
1118   return AddOrUpdateGalleryInternal(gallery_info.device_id,
1119                             gallery_info.display_name,
1120                             gallery_info.path,
1121                             type,
1122                             gallery_info.volume_label,
1123                             gallery_info.vendor_name,
1124                             gallery_info.model_name,
1125                             gallery_info.total_size_in_bytes,
1126                             gallery_info.last_attach_time,
1127                             gallery_info.volume_metadata_valid,
1128                             0, 0, 0,
1129                             kCurrentPrefsVersion,
1130                             MediaGalleryPrefInfo::kNotDefault);
1131 }
1132
1133 void MediaGalleriesPreferences::ForgetGalleryById(MediaGalleryPrefId id) {
1134   EraseOrBlacklistGalleryById(id, false);
1135 }
1136
1137 void MediaGalleriesPreferences::EraseGalleryById(MediaGalleryPrefId id) {
1138   EraseOrBlacklistGalleryById(id, true);
1139 }
1140
1141 void MediaGalleriesPreferences::EraseOrBlacklistGalleryById(
1142     MediaGalleryPrefId id, bool erase) {
1143   DCHECK(IsInitialized());
1144   PrefService* prefs = profile_->GetPrefs();
1145   scoped_ptr<ListPrefUpdate> update(new ListPrefUpdate(
1146       prefs, prefs::kMediaGalleriesRememberedGalleries));
1147   base::ListValue* list = update->Get();
1148
1149   if (!ContainsKey(known_galleries_, id))
1150     return;
1151
1152   for (base::ListValue::iterator iter = list->begin();
1153        iter != list->end(); ++iter) {
1154     base::DictionaryValue* dict;
1155     MediaGalleryPrefId iter_id;
1156     if ((*iter)->GetAsDictionary(&dict) && GetPrefId(*dict, &iter_id) &&
1157         id == iter_id) {
1158       RemoveGalleryPermissionsFromPrefs(id);
1159       MediaGalleryPrefInfo::Type type;
1160       if (!erase && GetType(*dict, &type) &&
1161           (type == MediaGalleryPrefInfo::kAutoDetected ||
1162            type == MediaGalleryPrefInfo::kScanResult)) {
1163         if (type == MediaGalleryPrefInfo::kAutoDetected) {
1164           dict->SetString(kMediaGalleriesTypeKey,
1165                           kMediaGalleriesTypeBlackListedValue);
1166         } else {
1167           dict->SetString(kMediaGalleriesTypeKey,
1168                           kMediaGalleriesTypeRemovedScanValue);
1169           dict->SetInteger(kMediaGalleriesScanAudioCountKey, 0);
1170           dict->SetInteger(kMediaGalleriesScanImageCountKey, 0);
1171           dict->SetInteger(kMediaGalleriesScanVideoCountKey, 0);
1172         }
1173       } else {
1174         list->Erase(iter, NULL);
1175       }
1176       update.reset(NULL);  // commits the update.
1177
1178       InitFromPrefs();
1179       FOR_EACH_OBSERVER(GalleryChangeObserver,
1180                         gallery_change_observers_,
1181                         OnGalleryRemoved(this, id));
1182       return;
1183     }
1184   }
1185 }
1186
1187 bool MediaGalleriesPreferences::NonAutoGalleryHasPermission(
1188     MediaGalleryPrefId id) const {
1189   DCHECK(IsInitialized());
1190   DCHECK(!ContainsKey(known_galleries_, id) ||
1191          known_galleries_.find(id)->second.type !=
1192              MediaGalleryPrefInfo::kAutoDetected);
1193   ExtensionPrefs* prefs = GetExtensionPrefs();
1194   const base::DictionaryValue* extensions =
1195       prefs->pref_service()->GetDictionary(extensions::pref_names::kExtensions);
1196   if (!extensions)
1197     return true;
1198
1199   for (base::DictionaryValue::Iterator iter(*extensions); !iter.IsAtEnd();
1200        iter.Advance()) {
1201     if (!crx_file::id_util::IdIsValid(iter.key())) {
1202       NOTREACHED();
1203       continue;
1204     }
1205     std::vector<MediaGalleryPermission> permissions =
1206         GetGalleryPermissionsFromPrefs(iter.key());
1207     for (std::vector<MediaGalleryPermission>::const_iterator it =
1208              permissions.begin(); it != permissions.end(); ++it) {
1209       if (it->pref_id == id) {
1210         if (it->has_permission)
1211           return true;
1212         break;
1213       }
1214     }
1215   }
1216   return false;
1217 }
1218
1219 MediaGalleryPrefIdSet MediaGalleriesPreferences::GalleriesForExtension(
1220     const extensions::Extension& extension) {
1221   DCHECK(IsInitialized());
1222   MediaGalleryPrefIdSet result;
1223
1224   if (HasAutoDetectedGalleryPermission(extension)) {
1225     for (MediaGalleriesPrefInfoMap::const_iterator it =
1226              known_galleries_.begin(); it != known_galleries_.end(); ++it) {
1227       if (it->second.type == MediaGalleryPrefInfo::kAutoDetected)
1228         result.insert(it->second.pref_id);
1229     }
1230   }
1231
1232   std::vector<MediaGalleryPermission> stored_permissions =
1233       GetGalleryPermissionsFromPrefs(extension.id());
1234   for (std::vector<MediaGalleryPermission>::const_iterator it =
1235            stored_permissions.begin(); it != stored_permissions.end(); ++it) {
1236     if (!it->has_permission) {
1237       result.erase(it->pref_id);
1238     } else {
1239       MediaGalleriesPrefInfoMap::const_iterator gallery =
1240           known_galleries_.find(it->pref_id);
1241
1242       // Handle a stored permission for an erased gallery. This should never
1243       // happen but, has caused crashes in the wild. http://crbug.com/374330.
1244       if (gallery == known_galleries_.end()) {
1245         RemoveGalleryPermissionsFromPrefs(it->pref_id);
1246         continue;
1247       }
1248
1249       if (!gallery->second.IsBlackListedType()) {
1250         result.insert(it->pref_id);
1251       } else {
1252         NOTREACHED() << gallery->second.device_id;
1253       }
1254     }
1255   }
1256   return result;
1257 }
1258
1259 bool MediaGalleriesPreferences::SetGalleryPermissionForExtension(
1260     const extensions::Extension& extension,
1261     MediaGalleryPrefId pref_id,
1262     bool has_permission) {
1263   DCHECK(IsInitialized());
1264   // The gallery may not exist anymore if the user opened a second config
1265   // surface concurrently and removed it. Drop the permission update if so.
1266   MediaGalleriesPrefInfoMap::const_iterator gallery_info =
1267       known_galleries_.find(pref_id);
1268   if (gallery_info == known_galleries_.end())
1269     return false;
1270
1271   bool default_permission = false;
1272   if (gallery_info->second.type == MediaGalleryPrefInfo::kAutoDetected)
1273     default_permission = HasAutoDetectedGalleryPermission(extension);
1274   // When the permission matches the default, we don't need to remember it.
1275   if (has_permission == default_permission) {
1276     if (!UnsetGalleryPermissionInPrefs(extension.id(), pref_id))
1277       // If permission wasn't set, assume nothing has changed.
1278       return false;
1279   } else {
1280     if (!SetGalleryPermissionInPrefs(extension.id(), pref_id, has_permission))
1281       return false;
1282   }
1283   if (has_permission)
1284     FOR_EACH_OBSERVER(GalleryChangeObserver,
1285                       gallery_change_observers_,
1286                       OnPermissionAdded(this, extension.id(), pref_id));
1287   else
1288     FOR_EACH_OBSERVER(GalleryChangeObserver,
1289                       gallery_change_observers_,
1290                       OnPermissionRemoved(this, extension.id(), pref_id));
1291   return true;
1292 }
1293
1294 const MediaGalleriesPrefInfoMap& MediaGalleriesPreferences::known_galleries()
1295     const {
1296   DCHECK(IsInitialized());
1297   return known_galleries_;
1298 }
1299
1300 base::Time MediaGalleriesPreferences::GetLastScanCompletionTime() const {
1301   int64 last_scan_time_internal =
1302       profile_->GetPrefs()->GetInt64(prefs::kMediaGalleriesLastScanTime);
1303   return base::Time::FromInternalValue(last_scan_time_internal);
1304 }
1305
1306 void MediaGalleriesPreferences::SetLastScanCompletionTime(
1307     const base::Time& time) {
1308   profile_->GetPrefs()->SetInt64(prefs::kMediaGalleriesLastScanTime,
1309                                  time.ToInternalValue());
1310 }
1311
1312 void MediaGalleriesPreferences::Shutdown() {
1313   weak_factory_.InvalidateWeakPtrs();
1314   profile_ = NULL;
1315 }
1316
1317 // static
1318 bool MediaGalleriesPreferences::APIHasBeenUsed(Profile* profile) {
1319   MediaGalleryPrefId current_id =
1320       profile->GetPrefs()->GetUint64(prefs::kMediaGalleriesUniqueId);
1321   return current_id != kInvalidMediaGalleryPrefId + 1;
1322 }
1323
1324 // static
1325 void MediaGalleriesPreferences::RegisterProfilePrefs(
1326     user_prefs::PrefRegistrySyncable* registry) {
1327   registry->RegisterListPref(prefs::kMediaGalleriesRememberedGalleries,
1328                              user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1329   registry->RegisterUint64Pref(
1330       prefs::kMediaGalleriesUniqueId,
1331       kInvalidMediaGalleryPrefId + 1,
1332       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1333   registry->RegisterInt64Pref(
1334       prefs::kMediaGalleriesLastScanTime,
1335       base::Time().ToInternalValue(),
1336       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
1337 }
1338
1339 bool MediaGalleriesPreferences::SetGalleryPermissionInPrefs(
1340     const std::string& extension_id,
1341     MediaGalleryPrefId gallery_id,
1342     bool has_access) {
1343   DCHECK(IsInitialized());
1344   ExtensionPrefs::ScopedListUpdate update(GetExtensionPrefs(),
1345                                           extension_id,
1346                                           kMediaGalleriesPermissions);
1347   base::ListValue* permissions = update.Get();
1348   if (!permissions) {
1349     permissions = update.Create();
1350   } else {
1351     // If the gallery is already in the list, update the permission...
1352     for (base::ListValue::iterator iter = permissions->begin();
1353          iter != permissions->end(); ++iter) {
1354       base::DictionaryValue* dict = NULL;
1355       if (!(*iter)->GetAsDictionary(&dict))
1356         continue;
1357       MediaGalleryPermission perm;
1358       if (!GetMediaGalleryPermissionFromDictionary(dict, &perm))
1359         continue;
1360       if (perm.pref_id == gallery_id) {
1361         if (has_access != perm.has_permission) {
1362           dict->SetBoolean(kMediaGalleryHasPermissionKey, has_access);
1363           return true;
1364         } else {
1365           return false;
1366         }
1367       }
1368     }
1369   }
1370   // ...Otherwise, add a new entry for the gallery.
1371   base::DictionaryValue* dict = new base::DictionaryValue;
1372   dict->SetString(kMediaGalleryIdKey, base::Uint64ToString(gallery_id));
1373   dict->SetBoolean(kMediaGalleryHasPermissionKey, has_access);
1374   permissions->Append(dict);
1375   return true;
1376 }
1377
1378 bool MediaGalleriesPreferences::UnsetGalleryPermissionInPrefs(
1379     const std::string& extension_id,
1380     MediaGalleryPrefId gallery_id) {
1381   DCHECK(IsInitialized());
1382   ExtensionPrefs::ScopedListUpdate update(GetExtensionPrefs(),
1383                                           extension_id,
1384                                           kMediaGalleriesPermissions);
1385   base::ListValue* permissions = update.Get();
1386   if (!permissions)
1387     return false;
1388
1389   for (base::ListValue::iterator iter = permissions->begin();
1390        iter != permissions->end(); ++iter) {
1391     const base::DictionaryValue* dict = NULL;
1392     if (!(*iter)->GetAsDictionary(&dict))
1393       continue;
1394     MediaGalleryPermission perm;
1395     if (!GetMediaGalleryPermissionFromDictionary(dict, &perm))
1396       continue;
1397     if (perm.pref_id == gallery_id) {
1398       permissions->Erase(iter, NULL);
1399       return true;
1400     }
1401   }
1402   return false;
1403 }
1404
1405 std::vector<MediaGalleryPermission>
1406 MediaGalleriesPreferences::GetGalleryPermissionsFromPrefs(
1407     const std::string& extension_id) const {
1408   DCHECK(IsInitialized());
1409   std::vector<MediaGalleryPermission> result;
1410   const base::ListValue* permissions;
1411   if (!GetExtensionPrefs()->ReadPrefAsList(extension_id,
1412                                            kMediaGalleriesPermissions,
1413                                            &permissions)) {
1414     return result;
1415   }
1416
1417   for (base::ListValue::const_iterator iter = permissions->begin();
1418        iter != permissions->end(); ++iter) {
1419     base::DictionaryValue* dict = NULL;
1420     if (!(*iter)->GetAsDictionary(&dict))
1421       continue;
1422     MediaGalleryPermission perm;
1423     if (!GetMediaGalleryPermissionFromDictionary(dict, &perm))
1424       continue;
1425     result.push_back(perm);
1426   }
1427
1428   return result;
1429 }
1430
1431 void MediaGalleriesPreferences::RemoveGalleryPermissionsFromPrefs(
1432     MediaGalleryPrefId gallery_id) {
1433   DCHECK(IsInitialized());
1434   ExtensionPrefs* prefs = GetExtensionPrefs();
1435   const base::DictionaryValue* extensions =
1436       prefs->pref_service()->GetDictionary(extensions::pref_names::kExtensions);
1437   if (!extensions)
1438     return;
1439
1440   for (base::DictionaryValue::Iterator iter(*extensions); !iter.IsAtEnd();
1441        iter.Advance()) {
1442     if (!crx_file::id_util::IdIsValid(iter.key())) {
1443       NOTREACHED();
1444       continue;
1445     }
1446     UnsetGalleryPermissionInPrefs(iter.key(), gallery_id);
1447   }
1448 }
1449
1450 ExtensionPrefs* MediaGalleriesPreferences::GetExtensionPrefs() const {
1451   DCHECK(IsInitialized());
1452   if (extension_prefs_for_testing_)
1453     return extension_prefs_for_testing_;
1454   return extensions::ExtensionPrefs::Get(profile_);
1455 }
1456
1457 void MediaGalleriesPreferences::SetExtensionPrefsForTesting(
1458     extensions::ExtensionPrefs* extension_prefs) {
1459   DCHECK(IsInitialized());
1460   extension_prefs_for_testing_ = extension_prefs;
1461 }