Add Drive API parser for About/Apps json

chrome/browser/chromeos/gdata/drive_api_parser.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/chromeos/gdata/drive_api_parser.h"
+
+#include <algorithm>
+
+#include "base/basictypes.h"
+#include "base/file_path.h"
+#include "base/json/json_value_converter.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/string_number_conversions.h"
+#include "base/string_piece.h"
+#include "base/string_util.h"
+#include "base/values.h"
+#include "chrome/browser/chromeos/gdata/gdata_util.h"
+
+using base::Value;
+using base::DictionaryValue;
+using base::ListValue;
+
+namespace {
+
+// Converts |url_string| to |result|.  Always returns true to be used
+// for JSONValueConverter::RegisterCustomField method.
+// TODO(mukai): make it return false in case of invalid |url_string|.
+bool GetGURLFromString(const base::StringPiece& url_string, GURL* result) {
+  *result = GURL(url_string.as_string());
+  return true;
+}
+
+// Drive v2 API JSON names.
+
+// Common
+const char kKind[] = "kind";
+
+// About Resource:
+const char kAboutKind[] = "drive#about";
+const char kRootFolderId[] = "rootFolderId";
+const char kQuotaBytesTotal[] = "quotaBytesTotal";
+const char kQuotaBytesUsed[] = "quotaBytesUsed";
+const char kLargestChangeId[] = "largestChangeId";
+
+// App Icon:
+const char kCategory[] = "category";
+const char kSize[] = "size";
+const char kIconUrl[] = "iconUrl";
+
+// Apps Resource:
+const char kAppKind[] = "drive#app";
+const char kId[] = "id";
+const char kETag[] = "etag";
+const char kName[] = "name";
+const char kObjectType[] = "objectType";
+const char kSupportsCreate[] = "supportsCreate";
+const char kSupportsImport[] = "supportsImport";
+const char kInstalled[] = "installed";
+const char kAuthorized[] = "authorized";
+const char kProductUrl[] = "productUrl";
+const char kPrimaryMimeTypes[] = "primaryMimeTypes";
+const char kSecondaryMimeTypes[] = "secondaryMimeTypes";
+const char kPrimaryFileExtensions[] = "primaryFileExtensions";
+const char kSecondaryFileExtensions[] = "secondaryFileExtensions";
+const char kIcons[] = "icons";
+
+// Apps List:
+const char kAppListKind[] = "drive#appList";
+const char kItems[] = "items";
+
+
+// Maps category name to enum IconCategory.
+struct AppIconCategoryMap {
+  gdata::DriveAppIcon::IconCategory category;
+  const char* category_name;
+};
+
+const AppIconCategoryMap kAppIconCategoryMap[] = {
+  { gdata::DriveAppIcon::DOCUMENT, "document" },
+  { gdata::DriveAppIcon::APPLICATION, "application" },
+  { gdata::DriveAppIcon::SHARED_DOCUMENT, "documentShared" },
+};
+
+// Checks if the JSON is expected kind.  In Drive API, JSON data structure has
+// |kind| property which denotes the type of the structure (e.g. "drive#file").
+bool IsResourceKindExpected(const base::Value& value,
+                            const std::string& expected_kind) {
+  const base::DictionaryValue* as_dict = NULL;
+  std::string kind;
+  return value.GetAsDictionary(&as_dict) &&
+      as_dict->HasKey(kKind) &&
+      as_dict->GetString(kKind, &kind) &&
+      kind == expected_kind;
+}
+
+}  // namespace
+
+// TODO(kochi): Rename to namespace drive. http://crbug.com/136371
+namespace gdata {
+
+////////////////////////////////////////////////////////////////////////////////
+// AboutResource implementation
+
+AboutResource::AboutResource()
+    : quota_bytes_total_(0),
+      quota_bytes_used_(0),
+      largest_change_id_(0) {}
+
+AboutResource::~AboutResource() {}
+
+// static
+scoped_ptr<AboutResource> AboutResource::CreateFrom(const base::Value& value) {
+  scoped_ptr<AboutResource> resource(new AboutResource());
+  if (!IsResourceKindExpected(value, kAboutKind) || !resource->Parse(value)) {
+    LOG(ERROR) << "Unable to create: Invalid About resource JSON!";
+    return scoped_ptr<AboutResource>(NULL);
+  }
+  return resource.Pass();
+}
+
+// static
+void AboutResource::RegisterJSONConverter(
+    base::JSONValueConverter<AboutResource>* converter) {
+  converter->RegisterStringField(kRootFolderId,
+                                 &AboutResource::root_folder_id_);
+  converter->RegisterCustomField<int64>(kQuotaBytesTotal,
+                                        &AboutResource::quota_bytes_total_,
+                                        &base::StringToInt64);
+  converter->RegisterCustomField<int64>(kQuotaBytesUsed,
+                                        &AboutResource::quota_bytes_used_,
+                                        &base::StringToInt64);
+  converter->RegisterCustomField<int64>(kLargestChangeId,
+                                        &AboutResource::largest_change_id_,
+                                        &base::StringToInt64);
+}
+
+bool AboutResource::Parse(const base::Value& value) {
+  base::JSONValueConverter<AboutResource> converter;
+  if (!converter.Convert(value, this)) {
+    LOG(ERROR) << "Unable to parse: Invalid About resource JSON!";
+    return false;
+  }
+  return true;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// DriveAppIcon implementation
+
+DriveAppIcon::DriveAppIcon() {}
+
+DriveAppIcon::~DriveAppIcon() {}
+
+// static
+void DriveAppIcon::RegisterJSONConverter(
+    base::JSONValueConverter<DriveAppIcon>* converter) {
+  converter->RegisterCustomField<IconCategory>(
+      kCategory,
+      &DriveAppIcon::category_,
+      &DriveAppIcon::GetIconCategory);
+  converter->RegisterIntField(kSize, &DriveAppIcon::icon_side_length_);
+  converter->RegisterCustomField<GURL>(kIconUrl,
+                                       &DriveAppIcon::icon_url_,
+                                       GetGURLFromString);
+}
+
+// static
+scoped_ptr<DriveAppIcon> DriveAppIcon::CreateFrom(const base::Value& value) {
+  scoped_ptr<DriveAppIcon> resource(new DriveAppIcon());
+  if (!resource->Parse(value)) {
+    LOG(ERROR) << "Unable to create: Invalid DriveAppIcon JSON!";
+    return scoped_ptr<DriveAppIcon>(NULL);
+  }
+  return resource.Pass();
+}
+
+bool DriveAppIcon::Parse(const base::Value& value) {
+  base::JSONValueConverter<DriveAppIcon> converter;
+  if (!converter.Convert(value, this)) {
+    LOG(ERROR) << "Unable to parse: Invalid DriveAppIcon";
+    return false;
+  }
+  return true;
+}
+
+// static
+bool DriveAppIcon::GetIconCategory(const base::StringPiece& category,
+                                   DriveAppIcon::IconCategory* result) {
+  for (size_t i = 0; i < arraysize(kAppIconCategoryMap); i++) {
+    if (category == kAppIconCategoryMap[i].category_name) {
+      *result = kAppIconCategoryMap[i].category;
+      return true;
+    }
+  }
+  DVLOG(1) << "Unknown icon category " << category;
+  return false;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// AppResource implementation
+
+AppResource::AppResource() {}
+
+AppResource::~AppResource() {}
+
+// static
+void AppResource::RegisterJSONConverter(
+    base::JSONValueConverter<AppResource>* converter) {
+  converter->RegisterStringField(kId, &AppResource::id_);
+  converter->RegisterStringField(kName, &AppResource::name_);
+  converter->RegisterStringField(kObjectType, &AppResource::object_type_);
+  converter->RegisterBoolField(kSupportsCreate, &AppResource::supports_create_);
+  converter->RegisterBoolField(kSupportsImport, &AppResource::supports_import_);
+  converter->RegisterBoolField(kInstalled, &AppResource::installed_);
+  converter->RegisterBoolField(kAuthorized, &AppResource::authorized_);
+  converter->RegisterCustomField<GURL>(kProductUrl,
+                                       &AppResource::product_url_,
+                                       GetGURLFromString);
+  converter->RegisterRepeatedString(kPrimaryMimeTypes,
+                                    &AppResource::primary_mimetypes_);
+  converter->RegisterRepeatedString(kSecondaryMimeTypes,
+                                    &AppResource::secondary_mimetypes_);
+  converter->RegisterRepeatedString(kPrimaryFileExtensions,
+                                    &AppResource::primary_file_extensions_);
+  converter->RegisterRepeatedString(kSecondaryFileExtensions,
+                                    &AppResource::secondary_file_extensions_);
+  converter->RegisterRepeatedMessage(kIcons, &AppResource::icons_);
+}
+
+// static
+scoped_ptr<AppResource> AppResource::CreateFrom(const base::Value& value) {
+  scoped_ptr<AppResource> resource(new AppResource());
+  if (!IsResourceKindExpected(value, kAppKind) || !resource->Parse(value)) {
+    LOG(ERROR) << "Unable to create: Invalid AppResource JSON!";
+    return scoped_ptr<AppResource>(NULL);
+  }
+  return resource.Pass();
+}
+
+bool AppResource::Parse(const base::Value& value) {
+  base::JSONValueConverter<AppResource> converter;
+  if (!converter.Convert(value, this)) {
+    LOG(ERROR) << "Unable to parse: Invalid AppResource";
+    return false;
+  }
+  return true;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// AppList implementation
+
+AppList::AppList() {}
+
+AppList::~AppList() {}
+
+// static
+void AppList::RegisterJSONConverter(
+    base::JSONValueConverter<AppList>* converter) {
+  converter->RegisterStringField(kETag, &AppList::etag_);
+  converter->RegisterRepeatedMessage<AppResource>(kItems,
+                                                   &AppList::items_);
+}
+
+// static
+scoped_ptr<AppList> AppList::CreateFrom(const base::Value& value) {
+  scoped_ptr<AppList> resource(new AppList());
+  if (!IsResourceKindExpected(value, kAppListKind) || !resource->Parse(value)) {
+    LOG(ERROR) << "Unable to create: Invalid AppList JSON!";
+    return scoped_ptr<AppList>(NULL);
+  }
+  return resource.Pass();
+}
+
+bool AppList::Parse(const base::Value& value) {
+  base::JSONValueConverter<AppList> converter;
+  if (!converter.Convert(value, this)) {
+    LOG(ERROR) << "Unable to parse: Invalid AppList";
+    return false;
+  }
+  return true;
+}
+
+}  // namespace gdata