google_apis/drive/drive_api_parser.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 "google_apis/drive/drive_api_parser.h"
   6
   7 #include "base/basictypes.h"
   8 #include "base/json/json_value_converter.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/strings/string_number_conversions.h"
  11 #include "base/strings/string_piece.h"
  12 #include "base/strings/string_util.h"
  13 #include "base/values.h"
  14 #include "google_apis/drive/time_util.h"
  15
  16 namespace google_apis {
  17
  18 namespace {
  19
  20 const int64 kUnsetFileSize = -1;
  21
  22 bool CreateFileResourceFromValue(const base::Value* value,
  23                                  scoped_ptr<FileResource>* file) {
  24   *file = FileResource::CreateFrom(*value);
  25   return !!*file;
  26 }
  27
  28 // Converts |url_string| to |result|.  Always returns true to be used
  29 // for JSONValueConverter::RegisterCustomField method.
  30 // TODO(mukai): make it return false in case of invalid |url_string|.
  31 bool GetGURLFromString(const base::StringPiece& url_string, GURL* result) {
  32   *result = GURL(url_string.as_string());
  33   return true;
  34 }
  35
  36 // Converts |value| to |result|.
  37 bool GetParentsFromValue(const base::Value* value,
  38                          std::vector<ParentReference>* result) {
  39   DCHECK(value);
  40   DCHECK(result);
  41
  42   const base::ListValue* list_value = NULL;
  43   if (!value->GetAsList(&list_value))
  44     return false;
  45
  46   base::JSONValueConverter<ParentReference> converter;
  47   result->resize(list_value->GetSize());
  48   for (size_t i = 0; i < list_value->GetSize(); ++i) {
  49     const base::Value* parent_value = NULL;
  50     if (!list_value->Get(i, &parent_value) ||
  51         !converter.Convert(*parent_value, &(*result)[i]))
  52       return false;
  53   }
  54
  55   return true;
  56 }
  57
  58 // Converts |value| to |result|. The key of |value| is app_id, and its value
  59 // is URL to open the resource on the web app.
  60 bool GetOpenWithLinksFromDictionaryValue(
  61     const base::Value* value,
  62     std::vector<FileResource::OpenWithLink>* result) {
  63   DCHECK(value);
  64   DCHECK(result);
  65
  66   const base::DictionaryValue* dictionary_value;
  67   if (!value->GetAsDictionary(&dictionary_value))
  68     return false;
  69
  70   result->reserve(dictionary_value->size());
  71   for (base::DictionaryValue::Iterator iter(*dictionary_value);
  72        !iter.IsAtEnd(); iter.Advance()) {
  73     std::string string_value;
  74     if (!iter.value().GetAsString(&string_value))
  75       return false;
  76
  77     FileResource::OpenWithLink open_with_link;
  78     open_with_link.app_id = iter.key();
  79     open_with_link.open_url = GURL(string_value);
  80     result->push_back(open_with_link);
  81   }
  82
  83   return true;
  84 }
  85
  86 // Drive v2 API JSON names.
  87
  88 // Definition order follows the order of documentation in
  89 // https://developers.google.com/drive/v2/reference/
  90
  91 // Common
  92 const char kKind[] = "kind";
  93 const char kId[] = "id";
  94 const char kETag[] = "etag";
  95 const char kItems[] = "items";
  96 const char kLargestChangeId[] = "largestChangeId";
  97
  98 // About Resource
  99 // https://developers.google.com/drive/v2/reference/about
 100 const char kAboutKind[] = "drive#about";
 101 const char kQuotaBytesTotal[] = "quotaBytesTotal";
 102 const char kQuotaBytesUsed[] = "quotaBytesUsed";
 103 const char kRootFolderId[] = "rootFolderId";
 104
 105 // App Icon
 106 // https://developers.google.com/drive/v2/reference/apps
 107 const char kCategory[] = "category";
 108 const char kSize[] = "size";
 109 const char kIconUrl[] = "iconUrl";
 110
 111 // Apps Resource
 112 // https://developers.google.com/drive/v2/reference/apps
 113 const char kAppKind[] = "drive#app";
 114 const char kName[] = "name";
 115 const char kObjectType[] = "objectType";
 116 const char kProductId[] = "productId";
 117 const char kSupportsCreate[] = "supportsCreate";
 118 const char kRemovable[] = "removable";
 119 const char kPrimaryMimeTypes[] = "primaryMimeTypes";
 120 const char kSecondaryMimeTypes[] = "secondaryMimeTypes";
 121 const char kPrimaryFileExtensions[] = "primaryFileExtensions";
 122 const char kSecondaryFileExtensions[] = "secondaryFileExtensions";
 123 const char kIcons[] = "icons";
 124 const char kCreateUrl[] = "createUrl";
 125
 126 // Apps List
 127 // https://developers.google.com/drive/v2/reference/apps/list
 128 const char kAppListKind[] = "drive#appList";
 129
 130 // Parent Resource
 131 // https://developers.google.com/drive/v2/reference/parents
 132 const char kParentReferenceKind[] = "drive#parentReference";
 133 const char kParentLink[] = "parentLink";
 134
 135 // File Resource
 136 // https://developers.google.com/drive/v2/reference/files
 137 const char kFileKind[] = "drive#file";
 138 const char kTitle[] = "title";
 139 const char kMimeType[] = "mimeType";
 140 const char kCreatedDate[] = "createdDate";
 141 const char kModificationDate[] = "modificationDate";
 142 const char kModifiedDate[] = "modifiedDate";
 143 const char kLastViewedByMeDate[] = "lastViewedByMeDate";
 144 const char kSharedWithMeDate[] = "sharedWithMeDate";
 145 const char kMd5Checksum[] = "md5Checksum";
 146 const char kFileSize[] = "fileSize";
 147 const char kAlternateLink[] = "alternateLink";
 148 const char kParents[] = "parents";
 149 const char kOpenWithLinks[] = "openWithLinks";
 150 const char kLabels[] = "labels";
 151 const char kImageMediaMetadata[] = "imageMediaMetadata";
 152 const char kShared[] = "shared";
 153 // These 5 flags are defined under |labels|.
 154 const char kLabelTrashed[] = "trashed";
 155 // These 3 flags are defined under |imageMediaMetadata|.
 156 const char kImageMediaMetadataWidth[] = "width";
 157 const char kImageMediaMetadataHeight[] = "height";
 158 const char kImageMediaMetadataRotation[] = "rotation";
 159 // URL to the share dialog UI, which is provided only in v2internal.
 160 const char kShareLink[] = "shareLink";
 161
 162 const char kDriveFolderMimeType[] = "application/vnd.google-apps.folder";
 163
 164 // Files List
 165 // https://developers.google.com/drive/v2/reference/files/list
 166 const char kFileListKind[] = "drive#fileList";
 167 const char kNextLink[] = "nextLink";
 168
 169 // Change Resource
 170 // https://developers.google.com/drive/v2/reference/changes
 171 const char kChangeKind[] = "drive#change";
 172 const char kFileId[] = "fileId";
 173 const char kDeleted[] = "deleted";
 174 const char kFile[] = "file";
 175
 176 // Changes List
 177 // https://developers.google.com/drive/v2/reference/changes/list
 178 const char kChangeListKind[] = "drive#changeList";
 179
 180 // Maps category name to enum IconCategory.
 181 struct AppIconCategoryMap {
 182   DriveAppIcon::IconCategory category;
 183   const char* category_name;
 184 };
 185
 186 const AppIconCategoryMap kAppIconCategoryMap[] = {
 187   { DriveAppIcon::DOCUMENT, "document" },
 188   { DriveAppIcon::APPLICATION, "application" },
 189   { DriveAppIcon::SHARED_DOCUMENT, "documentShared" },
 190 };
 191
 192 // Checks if the JSON is expected kind.  In Drive API, JSON data structure has
 193 // |kind| property which denotes the type of the structure (e.g. "drive#file").
 194 bool IsResourceKindExpected(const base::Value& value,
 195                             const std::string& expected_kind) {
 196   const base::DictionaryValue* as_dict = NULL;
 197   std::string kind;
 198   return value.GetAsDictionary(&as_dict) &&
 199       as_dict->HasKey(kKind) &&
 200       as_dict->GetString(kKind, &kind) &&
 201       kind == expected_kind;
 202 }
 203
 204 }  // namespace
 205
 206 ////////////////////////////////////////////////////////////////////////////////
 207 // AboutResource implementation
 208
 209 AboutResource::AboutResource()
 210     : largest_change_id_(0),
 211       quota_bytes_total_(0),
 212       quota_bytes_used_(0) {}
 213
 214 AboutResource::~AboutResource() {}
 215
 216 // static
 217 scoped_ptr<AboutResource> AboutResource::CreateFrom(const base::Value& value) {
 218   scoped_ptr<AboutResource> resource(new AboutResource());
 219   if (!IsResourceKindExpected(value, kAboutKind) || !resource->Parse(value)) {
 220     LOG(ERROR) << "Unable to create: Invalid About resource JSON!";
 221     return scoped_ptr<AboutResource>();
 222   }
 223   return resource.Pass();
 224 }
 225
 226 // static
 227 void AboutResource::RegisterJSONConverter(
 228     base::JSONValueConverter<AboutResource>* converter) {
 229   converter->RegisterCustomField<int64>(kLargestChangeId,
 230                                         &AboutResource::largest_change_id_,
 231                                         &base::StringToInt64);
 232   converter->RegisterCustomField<int64>(kQuotaBytesTotal,
 233                                         &AboutResource::quota_bytes_total_,
 234                                         &base::StringToInt64);
 235   converter->RegisterCustomField<int64>(kQuotaBytesUsed,
 236                                         &AboutResource::quota_bytes_used_,
 237                                         &base::StringToInt64);
 238   converter->RegisterStringField(kRootFolderId,
 239                                  &AboutResource::root_folder_id_);
 240 }
 241
 242 bool AboutResource::Parse(const base::Value& value) {
 243   base::JSONValueConverter<AboutResource> converter;
 244   if (!converter.Convert(value, this)) {
 245     LOG(ERROR) << "Unable to parse: Invalid About resource JSON!";
 246     return false;
 247   }
 248   return true;
 249 }
 250
 251 ////////////////////////////////////////////////////////////////////////////////
 252 // DriveAppIcon implementation
 253
 254 DriveAppIcon::DriveAppIcon() : category_(UNKNOWN), icon_side_length_(0) {}
 255
 256 DriveAppIcon::~DriveAppIcon() {}
 257
 258 // static
 259 void DriveAppIcon::RegisterJSONConverter(
 260     base::JSONValueConverter<DriveAppIcon>* converter) {
 261   converter->RegisterCustomField<IconCategory>(
 262       kCategory,
 263       &DriveAppIcon::category_,
 264       &DriveAppIcon::GetIconCategory);
 265   converter->RegisterIntField(kSize, &DriveAppIcon::icon_side_length_);
 266   converter->RegisterCustomField<GURL>(kIconUrl,
 267                                        &DriveAppIcon::icon_url_,
 268                                        GetGURLFromString);
 269 }
 270
 271 // static
 272 scoped_ptr<DriveAppIcon> DriveAppIcon::CreateFrom(const base::Value& value) {
 273   scoped_ptr<DriveAppIcon> resource(new DriveAppIcon());
 274   if (!resource->Parse(value)) {
 275     LOG(ERROR) << "Unable to create: Invalid DriveAppIcon JSON!";
 276     return scoped_ptr<DriveAppIcon>();
 277   }
 278   return resource.Pass();
 279 }
 280
 281 bool DriveAppIcon::Parse(const base::Value& value) {
 282   base::JSONValueConverter<DriveAppIcon> converter;
 283   if (!converter.Convert(value, this)) {
 284     LOG(ERROR) << "Unable to parse: Invalid DriveAppIcon";
 285     return false;
 286   }
 287   return true;
 288 }
 289
 290 // static
 291 bool DriveAppIcon::GetIconCategory(const base::StringPiece& category,
 292                                    DriveAppIcon::IconCategory* result) {
 293   for (size_t i = 0; i < arraysize(kAppIconCategoryMap); i++) {
 294     if (category == kAppIconCategoryMap[i].category_name) {
 295       *result = kAppIconCategoryMap[i].category;
 296       return true;
 297     }
 298   }
 299   DVLOG(1) << "Unknown icon category " << category;
 300   return false;
 301 }
 302
 303 ////////////////////////////////////////////////////////////////////////////////
 304 // AppResource implementation
 305
 306 AppResource::AppResource()
 307     : supports_create_(false),
 308       removable_(false) {
 309 }
 310
 311 AppResource::~AppResource() {}
 312
 313 // static
 314 void AppResource::RegisterJSONConverter(
 315     base::JSONValueConverter<AppResource>* converter) {
 316   converter->RegisterStringField(kId, &AppResource::application_id_);
 317   converter->RegisterStringField(kName, &AppResource::name_);
 318   converter->RegisterStringField(kObjectType, &AppResource::object_type_);
 319   converter->RegisterStringField(kProductId, &AppResource::product_id_);
 320   converter->RegisterBoolField(kSupportsCreate, &AppResource::supports_create_);
 321   converter->RegisterBoolField(kRemovable, &AppResource::removable_);
 322   converter->RegisterRepeatedString(kPrimaryMimeTypes,
 323                                     &AppResource::primary_mimetypes_);
 324   converter->RegisterRepeatedString(kSecondaryMimeTypes,
 325                                     &AppResource::secondary_mimetypes_);
 326   converter->RegisterRepeatedString(kPrimaryFileExtensions,
 327                                     &AppResource::primary_file_extensions_);
 328   converter->RegisterRepeatedString(kSecondaryFileExtensions,
 329                                     &AppResource::secondary_file_extensions_);
 330   converter->RegisterRepeatedMessage(kIcons, &AppResource::icons_);
 331   converter->RegisterCustomField<GURL>(kCreateUrl,
 332                                        &AppResource::create_url_,
 333                                        GetGURLFromString);
 334 }
 335
 336 // static
 337 scoped_ptr<AppResource> AppResource::CreateFrom(const base::Value& value) {
 338   scoped_ptr<AppResource> resource(new AppResource());
 339   if (!IsResourceKindExpected(value, kAppKind) || !resource->Parse(value)) {
 340     LOG(ERROR) << "Unable to create: Invalid AppResource JSON!";
 341     return scoped_ptr<AppResource>();
 342   }
 343   return resource.Pass();
 344 }
 345
 346 bool AppResource::Parse(const base::Value& value) {
 347   base::JSONValueConverter<AppResource> converter;
 348   if (!converter.Convert(value, this)) {
 349     LOG(ERROR) << "Unable to parse: Invalid AppResource";
 350     return false;
 351   }
 352   return true;
 353 }
 354
 355 ////////////////////////////////////////////////////////////////////////////////
 356 // AppList implementation
 357
 358 AppList::AppList() {}
 359
 360 AppList::~AppList() {}
 361
 362 // static
 363 void AppList::RegisterJSONConverter(
 364     base::JSONValueConverter<AppList>* converter) {
 365   converter->RegisterStringField(kETag, &AppList::etag_);
 366   converter->RegisterRepeatedMessage<AppResource>(kItems,
 367                                                    &AppList::items_);
 368 }
 369
 370 // static
 371 scoped_ptr<AppList> AppList::CreateFrom(const base::Value& value) {
 372   scoped_ptr<AppList> resource(new AppList());
 373   if (!IsResourceKindExpected(value, kAppListKind) || !resource->Parse(value)) {
 374     LOG(ERROR) << "Unable to create: Invalid AppList JSON!";
 375     return scoped_ptr<AppList>();
 376   }
 377   return resource.Pass();
 378 }
 379
 380 bool AppList::Parse(const base::Value& value) {
 381   base::JSONValueConverter<AppList> converter;
 382   if (!converter.Convert(value, this)) {
 383     LOG(ERROR) << "Unable to parse: Invalid AppList";
 384     return false;
 385   }
 386   return true;
 387 }
 388
 389 ////////////////////////////////////////////////////////////////////////////////
 390 // ParentReference implementation
 391
 392 ParentReference::ParentReference() {}
 393
 394 ParentReference::~ParentReference() {}
 395
 396 // static
 397 void ParentReference::RegisterJSONConverter(
 398     base::JSONValueConverter<ParentReference>* converter) {
 399   converter->RegisterStringField(kId, &ParentReference::file_id_);
 400   converter->RegisterCustomField<GURL>(kParentLink,
 401                                        &ParentReference::parent_link_,
 402                                        GetGURLFromString);
 403 }
 404
 405 // static
 406 scoped_ptr<ParentReference>
 407 ParentReference::CreateFrom(const base::Value& value) {
 408   scoped_ptr<ParentReference> reference(new ParentReference());
 409   if (!IsResourceKindExpected(value, kParentReferenceKind) ||
 410       !reference->Parse(value)) {
 411     LOG(ERROR) << "Unable to create: Invalid ParentRefernce JSON!";
 412     return scoped_ptr<ParentReference>();
 413   }
 414   return reference.Pass();
 415 }
 416
 417 bool ParentReference::Parse(const base::Value& value) {
 418   base::JSONValueConverter<ParentReference> converter;
 419   if (!converter.Convert(value, this)) {
 420     LOG(ERROR) << "Unable to parse: Invalid ParentReference";
 421     return false;
 422   }
 423   return true;
 424 }
 425
 426 ////////////////////////////////////////////////////////////////////////////////
 427 // FileResource implementation
 428
 429 FileResource::FileResource() : shared_(false), file_size_(kUnsetFileSize) {}
 430
 431 FileResource::~FileResource() {}
 432
 433 // static
 434 void FileResource::RegisterJSONConverter(
 435     base::JSONValueConverter<FileResource>* converter) {
 436   converter->RegisterStringField(kId, &FileResource::file_id_);
 437   converter->RegisterStringField(kETag, &FileResource::etag_);
 438   converter->RegisterStringField(kTitle, &FileResource::title_);
 439   converter->RegisterStringField(kMimeType, &FileResource::mime_type_);
 440   converter->RegisterNestedField(kLabels, &FileResource::labels_);
 441   converter->RegisterNestedField(kImageMediaMetadata,
 442                                  &FileResource::image_media_metadata_);
 443   converter->RegisterCustomField<base::Time>(
 444       kCreatedDate,
 445       &FileResource::created_date_,
 446       &util::GetTimeFromString);
 447   converter->RegisterCustomField<base::Time>(
 448       kModifiedDate,
 449       &FileResource::modified_date_,
 450       &util::GetTimeFromString);
 451   converter->RegisterCustomField<base::Time>(
 452       kLastViewedByMeDate,
 453       &FileResource::last_viewed_by_me_date_,
 454       &util::GetTimeFromString);
 455   converter->RegisterCustomField<base::Time>(
 456       kSharedWithMeDate,
 457       &FileResource::shared_with_me_date_,
 458       &util::GetTimeFromString);
 459   converter->RegisterBoolField(kShared, &FileResource::shared_);
 460   converter->RegisterStringField(kMd5Checksum, &FileResource::md5_checksum_);
 461   converter->RegisterCustomField<int64>(kFileSize,
 462                                         &FileResource::file_size_,
 463                                         &base::StringToInt64);
 464   converter->RegisterCustomField<GURL>(kAlternateLink,
 465                                        &FileResource::alternate_link_,
 466                                        GetGURLFromString);
 467   converter->RegisterCustomField<GURL>(kShareLink,
 468                                        &FileResource::share_link_,
 469                                        GetGURLFromString);
 470   converter->RegisterCustomValueField<std::vector<ParentReference> >(
 471       kParents,
 472       &FileResource::parents_,
 473       GetParentsFromValue);
 474   converter->RegisterCustomValueField<std::vector<OpenWithLink> >(
 475       kOpenWithLinks,
 476       &FileResource::open_with_links_,
 477       GetOpenWithLinksFromDictionaryValue);
 478 }
 479
 480 // static
 481 scoped_ptr<FileResource> FileResource::CreateFrom(const base::Value& value) {
 482   scoped_ptr<FileResource> resource(new FileResource());
 483   if (!IsResourceKindExpected(value, kFileKind) || !resource->Parse(value)) {
 484     LOG(ERROR) << "Unable to create: Invalid FileResource JSON!";
 485     return scoped_ptr<FileResource>();
 486   }
 487   return resource.Pass();
 488 }
 489
 490 bool FileResource::IsDirectory() const {
 491   return mime_type_ == kDriveFolderMimeType;
 492 }
 493
 494 bool FileResource::IsHostedDocument() const {
 495   // Hosted documents don't have fileSize field set:
 496   // https://developers.google.com/drive/v2/reference/files
 497   return !IsDirectory() && file_size_ == kUnsetFileSize;
 498 }
 499
 500 bool FileResource::Parse(const base::Value& value) {
 501   base::JSONValueConverter<FileResource> converter;
 502   if (!converter.Convert(value, this)) {
 503     LOG(ERROR) << "Unable to parse: Invalid FileResource";
 504     return false;
 505   }
 506   return true;
 507 }
 508
 509 ////////////////////////////////////////////////////////////////////////////////
 510 // FileList implementation
 511
 512 FileList::FileList() {}
 513
 514 FileList::~FileList() {}
 515
 516 // static
 517 void FileList::RegisterJSONConverter(
 518     base::JSONValueConverter<FileList>* converter) {
 519   converter->RegisterCustomField<GURL>(kNextLink,
 520                                        &FileList::next_link_,
 521                                        GetGURLFromString);
 522   converter->RegisterRepeatedMessage<FileResource>(kItems,
 523                                                    &FileList::items_);
 524 }
 525
 526 // static
 527 bool FileList::HasFileListKind(const base::Value& value) {
 528   return IsResourceKindExpected(value, kFileListKind);
 529 }
 530
 531 // static
 532 scoped_ptr<FileList> FileList::CreateFrom(const base::Value& value) {
 533   scoped_ptr<FileList> resource(new FileList());
 534   if (!HasFileListKind(value) || !resource->Parse(value)) {
 535     LOG(ERROR) << "Unable to create: Invalid FileList JSON!";
 536     return scoped_ptr<FileList>();
 537   }
 538   return resource.Pass();
 539 }
 540
 541 bool FileList::Parse(const base::Value& value) {
 542   base::JSONValueConverter<FileList> converter;
 543   if (!converter.Convert(value, this)) {
 544     LOG(ERROR) << "Unable to parse: Invalid FileList";
 545     return false;
 546   }
 547   return true;
 548 }
 549
 550 ////////////////////////////////////////////////////////////////////////////////
 551 // ChangeResource implementation
 552
 553 ChangeResource::ChangeResource() : change_id_(0), deleted_(false) {}
 554
 555 ChangeResource::~ChangeResource() {}
 556
 557 // static
 558 void ChangeResource::RegisterJSONConverter(
 559     base::JSONValueConverter<ChangeResource>* converter) {
 560   converter->RegisterCustomField<int64>(kId,
 561                                         &ChangeResource::change_id_,
 562                                         &base::StringToInt64);
 563   converter->RegisterStringField(kFileId, &ChangeResource::file_id_);
 564   converter->RegisterBoolField(kDeleted, &ChangeResource::deleted_);
 565   converter->RegisterCustomValueField(kFile, &ChangeResource::file_,
 566                                       &CreateFileResourceFromValue);
 567   converter->RegisterCustomField<base::Time>(
 568       kModificationDate, &ChangeResource::modification_date_,
 569       &util::GetTimeFromString);
 570 }
 571
 572 // static
 573 scoped_ptr<ChangeResource>
 574 ChangeResource::CreateFrom(const base::Value& value) {
 575   scoped_ptr<ChangeResource> resource(new ChangeResource());
 576   if (!IsResourceKindExpected(value, kChangeKind) || !resource->Parse(value)) {
 577     LOG(ERROR) << "Unable to create: Invalid ChangeResource JSON!";
 578     return scoped_ptr<ChangeResource>();
 579   }
 580   return resource.Pass();
 581 }
 582
 583 bool ChangeResource::Parse(const base::Value& value) {
 584   base::JSONValueConverter<ChangeResource> converter;
 585   if (!converter.Convert(value, this)) {
 586     LOG(ERROR) << "Unable to parse: Invalid ChangeResource";
 587     return false;
 588   }
 589   return true;
 590 }
 591
 592 ////////////////////////////////////////////////////////////////////////////////
 593 // ChangeList implementation
 594
 595 ChangeList::ChangeList() : largest_change_id_(0) {}
 596
 597 ChangeList::~ChangeList() {}
 598
 599 // static
 600 void ChangeList::RegisterJSONConverter(
 601     base::JSONValueConverter<ChangeList>* converter) {
 602   converter->RegisterCustomField<GURL>(kNextLink,
 603                                        &ChangeList::next_link_,
 604                                        GetGURLFromString);
 605   converter->RegisterCustomField<int64>(kLargestChangeId,
 606                                         &ChangeList::largest_change_id_,
 607                                         &base::StringToInt64);
 608   converter->RegisterRepeatedMessage<ChangeResource>(kItems,
 609                                                      &ChangeList::items_);
 610 }
 611
 612 // static
 613 bool ChangeList::HasChangeListKind(const base::Value& value) {
 614   return IsResourceKindExpected(value, kChangeListKind);
 615 }
 616
 617 // static
 618 scoped_ptr<ChangeList> ChangeList::CreateFrom(const base::Value& value) {
 619   scoped_ptr<ChangeList> resource(new ChangeList());
 620   if (!HasChangeListKind(value) || !resource->Parse(value)) {
 621     LOG(ERROR) << "Unable to create: Invalid ChangeList JSON!";
 622     return scoped_ptr<ChangeList>();
 623   }
 624   return resource.Pass();
 625 }
 626
 627 bool ChangeList::Parse(const base::Value& value) {
 628   base::JSONValueConverter<ChangeList> converter;
 629   if (!converter.Convert(value, this)) {
 630     LOG(ERROR) << "Unable to parse: Invalid ChangeList";
 631     return false;
 632   }
 633   return true;
 634 }
 635
 636
 637 ////////////////////////////////////////////////////////////////////////////////
 638 // FileLabels implementation
 639
 640 FileLabels::FileLabels() : trashed_(false) {}
 641
 642 FileLabels::~FileLabels() {}
 643
 644 // static
 645 void FileLabels::RegisterJSONConverter(
 646     base::JSONValueConverter<FileLabels>* converter) {
 647   converter->RegisterBoolField(kLabelTrashed, &FileLabels::trashed_);
 648 }
 649
 650 // static
 651 scoped_ptr<FileLabels> FileLabels::CreateFrom(const base::Value& value) {
 652   scoped_ptr<FileLabels> resource(new FileLabels());
 653   if (!resource->Parse(value)) {
 654     LOG(ERROR) << "Unable to create: Invalid FileLabels JSON!";
 655     return scoped_ptr<FileLabels>();
 656   }
 657   return resource.Pass();
 658 }
 659
 660 bool FileLabels::Parse(const base::Value& value) {
 661   base::JSONValueConverter<FileLabels> converter;
 662   if (!converter.Convert(value, this)) {
 663     LOG(ERROR) << "Unable to parse: Invalid FileLabels.";
 664     return false;
 665   }
 666   return true;
 667 }
 668
 669 ////////////////////////////////////////////////////////////////////////////////
 670 // ImageMediaMetadata implementation
 671
 672 ImageMediaMetadata::ImageMediaMetadata()
 673     : width_(-1),
 674       height_(-1),
 675       rotation_(-1) {}
 676
 677 ImageMediaMetadata::~ImageMediaMetadata() {}
 678
 679 // static
 680 void ImageMediaMetadata::RegisterJSONConverter(
 681     base::JSONValueConverter<ImageMediaMetadata>* converter) {
 682   converter->RegisterIntField(kImageMediaMetadataWidth,
 683                               &ImageMediaMetadata::width_);
 684   converter->RegisterIntField(kImageMediaMetadataHeight,
 685                               &ImageMediaMetadata::height_);
 686   converter->RegisterIntField(kImageMediaMetadataRotation,
 687                               &ImageMediaMetadata::rotation_);
 688 }
 689
 690 // static
 691 scoped_ptr<ImageMediaMetadata> ImageMediaMetadata::CreateFrom(
 692     const base::Value& value) {
 693   scoped_ptr<ImageMediaMetadata> resource(new ImageMediaMetadata());
 694   if (!resource->Parse(value)) {
 695     LOG(ERROR) << "Unable to create: Invalid ImageMediaMetadata JSON!";
 696     return scoped_ptr<ImageMediaMetadata>();
 697   }
 698   return resource.Pass();
 699 }
 700
 701 bool ImageMediaMetadata::Parse(const base::Value& value) {
 702   base::JSONValueConverter<ImageMediaMetadata> converter;
 703   if (!converter.Convert(value, this)) {
 704     LOG(ERROR) << "Unable to parse: Invalid ImageMediaMetadata.";
 705     return false;
 706   }
 707   return true;
 708 }
 709
 710 }  // namespace google_apis