src/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
 160 const char kDriveFolderMimeType[] = "application/vnd.google-apps.folder";
 161
 162 // Files List
 163 // https://developers.google.com/drive/v2/reference/files/list
 164 const char kFileListKind[] = "drive#fileList";
 165 const char kNextLink[] = "nextLink";
 166
 167 // Change Resource
 168 // https://developers.google.com/drive/v2/reference/changes
 169 const char kChangeKind[] = "drive#change";
 170 const char kFileId[] = "fileId";
 171 const char kDeleted[] = "deleted";
 172 const char kFile[] = "file";
 173
 174 // Changes List
 175 // https://developers.google.com/drive/v2/reference/changes/list
 176 const char kChangeListKind[] = "drive#changeList";
 177
 178 // Maps category name to enum IconCategory.
 179 struct AppIconCategoryMap {
 180   DriveAppIcon::IconCategory category;
 181   const char* category_name;
 182 };
 183
 184 const AppIconCategoryMap kAppIconCategoryMap[] = {
 185   { DriveAppIcon::DOCUMENT, "document" },
 186   { DriveAppIcon::APPLICATION, "application" },
 187   { DriveAppIcon::SHARED_DOCUMENT, "documentShared" },
 188 };
 189
 190 // Checks if the JSON is expected kind.  In Drive API, JSON data structure has
 191 // |kind| property which denotes the type of the structure (e.g. "drive#file").
 192 bool IsResourceKindExpected(const base::Value& value,
 193                             const std::string& expected_kind) {
 194   const base::DictionaryValue* as_dict = NULL;
 195   std::string kind;
 196   return value.GetAsDictionary(&as_dict) &&
 197       as_dict->HasKey(kKind) &&
 198       as_dict->GetString(kKind, &kind) &&
 199       kind == expected_kind;
 200 }
 201
 202 }  // namespace
 203
 204 ////////////////////////////////////////////////////////////////////////////////
 205 // AboutResource implementation
 206
 207 AboutResource::AboutResource()
 208     : largest_change_id_(0),
 209       quota_bytes_total_(0),
 210       quota_bytes_used_(0) {}
 211
 212 AboutResource::~AboutResource() {}
 213
 214 // static
 215 scoped_ptr<AboutResource> AboutResource::CreateFrom(const base::Value& value) {
 216   scoped_ptr<AboutResource> resource(new AboutResource());
 217   if (!IsResourceKindExpected(value, kAboutKind) || !resource->Parse(value)) {
 218     LOG(ERROR) << "Unable to create: Invalid About resource JSON!";
 219     return scoped_ptr<AboutResource>();
 220   }
 221   return resource.Pass();
 222 }
 223
 224 // static
 225 void AboutResource::RegisterJSONConverter(
 226     base::JSONValueConverter<AboutResource>* converter) {
 227   converter->RegisterCustomField<int64>(kLargestChangeId,
 228                                         &AboutResource::largest_change_id_,
 229                                         &base::StringToInt64);
 230   converter->RegisterCustomField<int64>(kQuotaBytesTotal,
 231                                         &AboutResource::quota_bytes_total_,
 232                                         &base::StringToInt64);
 233   converter->RegisterCustomField<int64>(kQuotaBytesUsed,
 234                                         &AboutResource::quota_bytes_used_,
 235                                         &base::StringToInt64);
 236   converter->RegisterStringField(kRootFolderId,
 237                                  &AboutResource::root_folder_id_);
 238 }
 239
 240 bool AboutResource::Parse(const base::Value& value) {
 241   base::JSONValueConverter<AboutResource> converter;
 242   if (!converter.Convert(value, this)) {
 243     LOG(ERROR) << "Unable to parse: Invalid About resource JSON!";
 244     return false;
 245   }
 246   return true;
 247 }
 248
 249 ////////////////////////////////////////////////////////////////////////////////
 250 // DriveAppIcon implementation
 251
 252 DriveAppIcon::DriveAppIcon() : category_(UNKNOWN), icon_side_length_(0) {}
 253
 254 DriveAppIcon::~DriveAppIcon() {}
 255
 256 // static
 257 void DriveAppIcon::RegisterJSONConverter(
 258     base::JSONValueConverter<DriveAppIcon>* converter) {
 259   converter->RegisterCustomField<IconCategory>(
 260       kCategory,
 261       &DriveAppIcon::category_,
 262       &DriveAppIcon::GetIconCategory);
 263   converter->RegisterIntField(kSize, &DriveAppIcon::icon_side_length_);
 264   converter->RegisterCustomField<GURL>(kIconUrl,
 265                                        &DriveAppIcon::icon_url_,
 266                                        GetGURLFromString);
 267 }
 268
 269 // static
 270 scoped_ptr<DriveAppIcon> DriveAppIcon::CreateFrom(const base::Value& value) {
 271   scoped_ptr<DriveAppIcon> resource(new DriveAppIcon());
 272   if (!resource->Parse(value)) {
 273     LOG(ERROR) << "Unable to create: Invalid DriveAppIcon JSON!";
 274     return scoped_ptr<DriveAppIcon>();
 275   }
 276   return resource.Pass();
 277 }
 278
 279 bool DriveAppIcon::Parse(const base::Value& value) {
 280   base::JSONValueConverter<DriveAppIcon> converter;
 281   if (!converter.Convert(value, this)) {
 282     LOG(ERROR) << "Unable to parse: Invalid DriveAppIcon";
 283     return false;
 284   }
 285   return true;
 286 }
 287
 288 // static
 289 bool DriveAppIcon::GetIconCategory(const base::StringPiece& category,
 290                                    DriveAppIcon::IconCategory* result) {
 291   for (size_t i = 0; i < arraysize(kAppIconCategoryMap); i++) {
 292     if (category == kAppIconCategoryMap[i].category_name) {
 293       *result = kAppIconCategoryMap[i].category;
 294       return true;
 295     }
 296   }
 297   DVLOG(1) << "Unknown icon category " << category;
 298   return false;
 299 }
 300
 301 ////////////////////////////////////////////////////////////////////////////////
 302 // AppResource implementation
 303
 304 AppResource::AppResource()
 305     : supports_create_(false),
 306       removable_(false) {
 307 }
 308
 309 AppResource::~AppResource() {}
 310
 311 // static
 312 void AppResource::RegisterJSONConverter(
 313     base::JSONValueConverter<AppResource>* converter) {
 314   converter->RegisterStringField(kId, &AppResource::application_id_);
 315   converter->RegisterStringField(kName, &AppResource::name_);
 316   converter->RegisterStringField(kObjectType, &AppResource::object_type_);
 317   converter->RegisterStringField(kProductId, &AppResource::product_id_);
 318   converter->RegisterBoolField(kSupportsCreate, &AppResource::supports_create_);
 319   converter->RegisterBoolField(kRemovable, &AppResource::removable_);
 320   converter->RegisterRepeatedString(kPrimaryMimeTypes,
 321                                     &AppResource::primary_mimetypes_);
 322   converter->RegisterRepeatedString(kSecondaryMimeTypes,
 323                                     &AppResource::secondary_mimetypes_);
 324   converter->RegisterRepeatedString(kPrimaryFileExtensions,
 325                                     &AppResource::primary_file_extensions_);
 326   converter->RegisterRepeatedString(kSecondaryFileExtensions,
 327                                     &AppResource::secondary_file_extensions_);
 328   converter->RegisterRepeatedMessage(kIcons, &AppResource::icons_);
 329   converter->RegisterCustomField<GURL>(kCreateUrl,
 330                                        &AppResource::create_url_,
 331                                        GetGURLFromString);
 332 }
 333
 334 // static
 335 scoped_ptr<AppResource> AppResource::CreateFrom(const base::Value& value) {
 336   scoped_ptr<AppResource> resource(new AppResource());
 337   if (!IsResourceKindExpected(value, kAppKind) || !resource->Parse(value)) {
 338     LOG(ERROR) << "Unable to create: Invalid AppResource JSON!";
 339     return scoped_ptr<AppResource>();
 340   }
 341   return resource.Pass();
 342 }
 343
 344 bool AppResource::Parse(const base::Value& value) {
 345   base::JSONValueConverter<AppResource> converter;
 346   if (!converter.Convert(value, this)) {
 347     LOG(ERROR) << "Unable to parse: Invalid AppResource";
 348     return false;
 349   }
 350   return true;
 351 }
 352
 353 ////////////////////////////////////////////////////////////////////////////////
 354 // AppList implementation
 355
 356 AppList::AppList() {}
 357
 358 AppList::~AppList() {}
 359
 360 // static
 361 void AppList::RegisterJSONConverter(
 362     base::JSONValueConverter<AppList>* converter) {
 363   converter->RegisterStringField(kETag, &AppList::etag_);
 364   converter->RegisterRepeatedMessage<AppResource>(kItems,
 365                                                    &AppList::items_);
 366 }
 367
 368 // static
 369 scoped_ptr<AppList> AppList::CreateFrom(const base::Value& value) {
 370   scoped_ptr<AppList> resource(new AppList());
 371   if (!IsResourceKindExpected(value, kAppListKind) || !resource->Parse(value)) {
 372     LOG(ERROR) << "Unable to create: Invalid AppList JSON!";
 373     return scoped_ptr<AppList>();
 374   }
 375   return resource.Pass();
 376 }
 377
 378 bool AppList::Parse(const base::Value& value) {
 379   base::JSONValueConverter<AppList> converter;
 380   if (!converter.Convert(value, this)) {
 381     LOG(ERROR) << "Unable to parse: Invalid AppList";
 382     return false;
 383   }
 384   return true;
 385 }
 386
 387 ////////////////////////////////////////////////////////////////////////////////
 388 // ParentReference implementation
 389
 390 ParentReference::ParentReference() {}
 391
 392 ParentReference::~ParentReference() {}
 393
 394 // static
 395 void ParentReference::RegisterJSONConverter(
 396     base::JSONValueConverter<ParentReference>* converter) {
 397   converter->RegisterStringField(kId, &ParentReference::file_id_);
 398   converter->RegisterCustomField<GURL>(kParentLink,
 399                                        &ParentReference::parent_link_,
 400                                        GetGURLFromString);
 401 }
 402
 403 // static
 404 scoped_ptr<ParentReference>
 405 ParentReference::CreateFrom(const base::Value& value) {
 406   scoped_ptr<ParentReference> reference(new ParentReference());
 407   if (!IsResourceKindExpected(value, kParentReferenceKind) ||
 408       !reference->Parse(value)) {
 409     LOG(ERROR) << "Unable to create: Invalid ParentRefernce JSON!";
 410     return scoped_ptr<ParentReference>();
 411   }
 412   return reference.Pass();
 413 }
 414
 415 bool ParentReference::Parse(const base::Value& value) {
 416   base::JSONValueConverter<ParentReference> converter;
 417   if (!converter.Convert(value, this)) {
 418     LOG(ERROR) << "Unable to parse: Invalid ParentReference";
 419     return false;
 420   }
 421   return true;
 422 }
 423
 424 ////////////////////////////////////////////////////////////////////////////////
 425 // FileResource implementation
 426
 427 FileResource::FileResource() : shared_(false), file_size_(kUnsetFileSize) {}
 428
 429 FileResource::~FileResource() {}
 430
 431 // static
 432 void FileResource::RegisterJSONConverter(
 433     base::JSONValueConverter<FileResource>* converter) {
 434   converter->RegisterStringField(kId, &FileResource::file_id_);
 435   converter->RegisterStringField(kETag, &FileResource::etag_);
 436   converter->RegisterStringField(kTitle, &FileResource::title_);
 437   converter->RegisterStringField(kMimeType, &FileResource::mime_type_);
 438   converter->RegisterNestedField(kLabels, &FileResource::labels_);
 439   converter->RegisterNestedField(kImageMediaMetadata,
 440                                  &FileResource::image_media_metadata_);
 441   converter->RegisterCustomField<base::Time>(
 442       kCreatedDate,
 443       &FileResource::created_date_,
 444       &util::GetTimeFromString);
 445   converter->RegisterCustomField<base::Time>(
 446       kModifiedDate,
 447       &FileResource::modified_date_,
 448       &util::GetTimeFromString);
 449   converter->RegisterCustomField<base::Time>(
 450       kLastViewedByMeDate,
 451       &FileResource::last_viewed_by_me_date_,
 452       &util::GetTimeFromString);
 453   converter->RegisterCustomField<base::Time>(
 454       kSharedWithMeDate,
 455       &FileResource::shared_with_me_date_,
 456       &util::GetTimeFromString);
 457   converter->RegisterBoolField(kShared, &FileResource::shared_);
 458   converter->RegisterStringField(kMd5Checksum, &FileResource::md5_checksum_);
 459   converter->RegisterCustomField<int64>(kFileSize,
 460                                         &FileResource::file_size_,
 461                                         &base::StringToInt64);
 462   converter->RegisterCustomField<GURL>(kAlternateLink,
 463                                        &FileResource::alternate_link_,
 464                                        GetGURLFromString);
 465   converter->RegisterCustomValueField<std::vector<ParentReference> >(
 466       kParents,
 467       &FileResource::parents_,
 468       GetParentsFromValue);
 469   converter->RegisterCustomValueField<std::vector<OpenWithLink> >(
 470       kOpenWithLinks,
 471       &FileResource::open_with_links_,
 472       GetOpenWithLinksFromDictionaryValue);
 473 }
 474
 475 // static
 476 scoped_ptr<FileResource> FileResource::CreateFrom(const base::Value& value) {
 477   scoped_ptr<FileResource> resource(new FileResource());
 478   if (!IsResourceKindExpected(value, kFileKind) || !resource->Parse(value)) {
 479     LOG(ERROR) << "Unable to create: Invalid FileResource JSON!";
 480     return scoped_ptr<FileResource>();
 481   }
 482   return resource.Pass();
 483 }
 484
 485 bool FileResource::IsDirectory() const {
 486   return mime_type_ == kDriveFolderMimeType;
 487 }
 488
 489 bool FileResource::IsHostedDocument() const {
 490   // Hosted documents don't have fileSize field set:
 491   // https://developers.google.com/drive/v2/reference/files
 492   return !IsDirectory() && file_size_ == kUnsetFileSize;
 493 }
 494
 495 bool FileResource::Parse(const base::Value& value) {
 496   base::JSONValueConverter<FileResource> converter;
 497   if (!converter.Convert(value, this)) {
 498     LOG(ERROR) << "Unable to parse: Invalid FileResource";
 499     return false;
 500   }
 501   return true;
 502 }
 503
 504 ////////////////////////////////////////////////////////////////////////////////
 505 // FileList implementation
 506
 507 FileList::FileList() {}
 508
 509 FileList::~FileList() {}
 510
 511 // static
 512 void FileList::RegisterJSONConverter(
 513     base::JSONValueConverter<FileList>* converter) {
 514   converter->RegisterCustomField<GURL>(kNextLink,
 515                                        &FileList::next_link_,
 516                                        GetGURLFromString);
 517   converter->RegisterRepeatedMessage<FileResource>(kItems,
 518                                                    &FileList::items_);
 519 }
 520
 521 // static
 522 bool FileList::HasFileListKind(const base::Value& value) {
 523   return IsResourceKindExpected(value, kFileListKind);
 524 }
 525
 526 // static
 527 scoped_ptr<FileList> FileList::CreateFrom(const base::Value& value) {
 528   scoped_ptr<FileList> resource(new FileList());
 529   if (!HasFileListKind(value) || !resource->Parse(value)) {
 530     LOG(ERROR) << "Unable to create: Invalid FileList JSON!";
 531     return scoped_ptr<FileList>();
 532   }
 533   return resource.Pass();
 534 }
 535
 536 bool FileList::Parse(const base::Value& value) {
 537   base::JSONValueConverter<FileList> converter;
 538   if (!converter.Convert(value, this)) {
 539     LOG(ERROR) << "Unable to parse: Invalid FileList";
 540     return false;
 541   }
 542   return true;
 543 }
 544
 545 ////////////////////////////////////////////////////////////////////////////////
 546 // ChangeResource implementation
 547
 548 ChangeResource::ChangeResource() : change_id_(0), deleted_(false) {}
 549
 550 ChangeResource::~ChangeResource() {}
 551
 552 // static
 553 void ChangeResource::RegisterJSONConverter(
 554     base::JSONValueConverter<ChangeResource>* converter) {
 555   converter->RegisterCustomField<int64>(kId,
 556                                         &ChangeResource::change_id_,
 557                                         &base::StringToInt64);
 558   converter->RegisterStringField(kFileId, &ChangeResource::file_id_);
 559   converter->RegisterBoolField(kDeleted, &ChangeResource::deleted_);
 560   converter->RegisterCustomValueField(kFile, &ChangeResource::file_,
 561                                       &CreateFileResourceFromValue);
 562   converter->RegisterCustomField<base::Time>(
 563       kModificationDate, &ChangeResource::modification_date_,
 564       &util::GetTimeFromString);
 565 }
 566
 567 // static
 568 scoped_ptr<ChangeResource>
 569 ChangeResource::CreateFrom(const base::Value& value) {
 570   scoped_ptr<ChangeResource> resource(new ChangeResource());
 571   if (!IsResourceKindExpected(value, kChangeKind) || !resource->Parse(value)) {
 572     LOG(ERROR) << "Unable to create: Invalid ChangeResource JSON!";
 573     return scoped_ptr<ChangeResource>();
 574   }
 575   return resource.Pass();
 576 }
 577
 578 bool ChangeResource::Parse(const base::Value& value) {
 579   base::JSONValueConverter<ChangeResource> converter;
 580   if (!converter.Convert(value, this)) {
 581     LOG(ERROR) << "Unable to parse: Invalid ChangeResource";
 582     return false;
 583   }
 584   return true;
 585 }
 586
 587 ////////////////////////////////////////////////////////////////////////////////
 588 // ChangeList implementation
 589
 590 ChangeList::ChangeList() : largest_change_id_(0) {}
 591
 592 ChangeList::~ChangeList() {}
 593
 594 // static
 595 void ChangeList::RegisterJSONConverter(
 596     base::JSONValueConverter<ChangeList>* converter) {
 597   converter->RegisterCustomField<GURL>(kNextLink,
 598                                        &ChangeList::next_link_,
 599                                        GetGURLFromString);
 600   converter->RegisterCustomField<int64>(kLargestChangeId,
 601                                         &ChangeList::largest_change_id_,
 602                                         &base::StringToInt64);
 603   converter->RegisterRepeatedMessage<ChangeResource>(kItems,
 604                                                      &ChangeList::items_);
 605 }
 606
 607 // static
 608 bool ChangeList::HasChangeListKind(const base::Value& value) {
 609   return IsResourceKindExpected(value, kChangeListKind);
 610 }
 611
 612 // static
 613 scoped_ptr<ChangeList> ChangeList::CreateFrom(const base::Value& value) {
 614   scoped_ptr<ChangeList> resource(new ChangeList());
 615   if (!HasChangeListKind(value) || !resource->Parse(value)) {
 616     LOG(ERROR) << "Unable to create: Invalid ChangeList JSON!";
 617     return scoped_ptr<ChangeList>();
 618   }
 619   return resource.Pass();
 620 }
 621
 622 bool ChangeList::Parse(const base::Value& value) {
 623   base::JSONValueConverter<ChangeList> converter;
 624   if (!converter.Convert(value, this)) {
 625     LOG(ERROR) << "Unable to parse: Invalid ChangeList";
 626     return false;
 627   }
 628   return true;
 629 }
 630
 631
 632 ////////////////////////////////////////////////////////////////////////////////
 633 // FileLabels implementation
 634
 635 FileLabels::FileLabels() : trashed_(false) {}
 636
 637 FileLabels::~FileLabels() {}
 638
 639 // static
 640 void FileLabels::RegisterJSONConverter(
 641     base::JSONValueConverter<FileLabels>* converter) {
 642   converter->RegisterBoolField(kLabelTrashed, &FileLabels::trashed_);
 643 }
 644
 645 // static
 646 scoped_ptr<FileLabels> FileLabels::CreateFrom(const base::Value& value) {
 647   scoped_ptr<FileLabels> resource(new FileLabels());
 648   if (!resource->Parse(value)) {
 649     LOG(ERROR) << "Unable to create: Invalid FileLabels JSON!";
 650     return scoped_ptr<FileLabels>();
 651   }
 652   return resource.Pass();
 653 }
 654
 655 bool FileLabels::Parse(const base::Value& value) {
 656   base::JSONValueConverter<FileLabels> converter;
 657   if (!converter.Convert(value, this)) {
 658     LOG(ERROR) << "Unable to parse: Invalid FileLabels.";
 659     return false;
 660   }
 661   return true;
 662 }
 663
 664 ////////////////////////////////////////////////////////////////////////////////
 665 // ImageMediaMetadata implementation
 666
 667 ImageMediaMetadata::ImageMediaMetadata()
 668     : width_(-1),
 669       height_(-1),
 670       rotation_(-1) {}
 671
 672 ImageMediaMetadata::~ImageMediaMetadata() {}
 673
 674 // static
 675 void ImageMediaMetadata::RegisterJSONConverter(
 676     base::JSONValueConverter<ImageMediaMetadata>* converter) {
 677   converter->RegisterIntField(kImageMediaMetadataWidth,
 678                               &ImageMediaMetadata::width_);
 679   converter->RegisterIntField(kImageMediaMetadataHeight,
 680                               &ImageMediaMetadata::height_);
 681   converter->RegisterIntField(kImageMediaMetadataRotation,
 682                               &ImageMediaMetadata::rotation_);
 683 }
 684
 685 // static
 686 scoped_ptr<ImageMediaMetadata> ImageMediaMetadata::CreateFrom(
 687     const base::Value& value) {
 688   scoped_ptr<ImageMediaMetadata> resource(new ImageMediaMetadata());
 689   if (!resource->Parse(value)) {
 690     LOG(ERROR) << "Unable to create: Invalid ImageMediaMetadata JSON!";
 691     return scoped_ptr<ImageMediaMetadata>();
 692   }
 693   return resource.Pass();
 694 }
 695
 696 bool ImageMediaMetadata::Parse(const base::Value& value) {
 697   base::JSONValueConverter<ImageMediaMetadata> converter;
 698   if (!converter.Convert(value, this)) {
 699     LOG(ERROR) << "Unable to parse: Invalid ImageMediaMetadata.";
 700     return false;
 701   }
 702   return true;
 703 }
 704
 705 }  // namespace google_apis