sync/syncable/entry_kernel.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 "sync/syncable/entry_kernel.h"
   6
   7 #include "base/strings/string_number_conversions.h"
   8 #include "sync/protocol/proto_value_conversions.h"
   9 #include "sync/syncable/syncable_enum_conversions.h"
  10 #include "sync/util/cryptographer.h"
  11
  12 namespace syncer {
  13 namespace syncable {
  14
  15 EntryKernel::EntryKernel() : dirty_(false) {
  16   // Everything else should already be default-initialized.
  17   for (int i = INT64_FIELDS_BEGIN; i < INT64_FIELDS_END; ++i) {
  18     int64_fields[i] = 0;
  19   }
  20 }
  21
  22 EntryKernel::~EntryKernel() {}
  23
  24 ModelType EntryKernel::GetModelType() const {
  25   ModelType specifics_type = GetModelTypeFromSpecifics(ref(SPECIFICS));
  26   if (specifics_type != UNSPECIFIED)
  27     return specifics_type;
  28   if (ref(ID).IsRoot())
  29     return TOP_LEVEL_FOLDER;
  30   // Loose check for server-created top-level folders that aren't
  31   // bound to a particular model type.
  32   if (!ref(UNIQUE_SERVER_TAG).empty() && ref(SERVER_IS_DIR))
  33     return TOP_LEVEL_FOLDER;
  34
  35   return UNSPECIFIED;
  36 }
  37
  38 ModelType EntryKernel::GetServerModelType() const {
  39   ModelType specifics_type = GetModelTypeFromSpecifics(ref(SERVER_SPECIFICS));
  40   if (specifics_type != UNSPECIFIED)
  41     return specifics_type;
  42   if (ref(ID).IsRoot())
  43     return TOP_LEVEL_FOLDER;
  44   // Loose check for server-created top-level folders that aren't
  45   // bound to a particular model type.
  46   if (!ref(UNIQUE_SERVER_TAG).empty() && ref(SERVER_IS_DIR))
  47     return TOP_LEVEL_FOLDER;
  48
  49   return UNSPECIFIED;
  50 }
  51
  52 bool EntryKernel::ShouldMaintainPosition() const {
  53   // We maintain positions for all bookmarks, except those that are
  54   // server-created top-level folders.
  55   return (GetModelTypeFromSpecifics(ref(SPECIFICS)) == syncer::BOOKMARKS)
  56       && !(!ref(UNIQUE_SERVER_TAG).empty() && ref(IS_DIR));
  57 }
  58
  59 bool EntryKernel::ShouldMaintainHierarchy() const {
  60   // We maintain hierarchy for bookmarks, device info, and top-level folders,
  61   // but no other types.  Note that the Nigori node consists of a single
  62   // top-level folder, so it's included in this set.
  63   return (GetModelTypeFromSpecifics(ref(SPECIFICS)) == syncer::BOOKMARKS)
  64       || (!ref(UNIQUE_SERVER_TAG).empty());
  65 }
  66
  67 namespace {
  68
  69 // Utility function to loop through a set of enum values and add the
  70 // field keys/values in the kernel to the given dictionary.
  71 //
  72 // V should be convertible to Value.
  73 template <class T, class U, class V>
  74 void SetFieldValues(const EntryKernel& kernel,
  75                     base::DictionaryValue* dictionary_value,
  76                     const char* (*enum_key_fn)(T),
  77                     V* (*enum_value_fn)(U),
  78                     int field_key_min, int field_key_max) {
  79   DCHECK_LE(field_key_min, field_key_max);
  80   for (int i = field_key_min; i <= field_key_max; ++i) {
  81     T field = static_cast<T>(i);
  82     const std::string& key = enum_key_fn(field);
  83     V* value = enum_value_fn(kernel.ref(field));
  84     dictionary_value->Set(key, value);
  85   }
  86 }
  87
  88 void SetEncryptableProtoValues(
  89     const EntryKernel& kernel,
  90     Cryptographer* cryptographer,
  91     base::DictionaryValue* dictionary_value,
  92     int field_key_min, int field_key_max) {
  93   DCHECK_LE(field_key_min, field_key_max);
  94   for (int i = field_key_min; i <= field_key_max; ++i) {
  95     ProtoField field = static_cast<ProtoField>(i);
  96     const std::string& key = GetProtoFieldString(field);
  97
  98     base::DictionaryValue* value = NULL;
  99     sync_pb::EntitySpecifics decrypted;
 100     const sync_pb::EncryptedData& encrypted = kernel.ref(field).encrypted();
 101     if (cryptographer &&
 102         kernel.ref(field).has_encrypted() &&
 103         cryptographer->CanDecrypt(encrypted) &&
 104         cryptographer->Decrypt(encrypted, &decrypted)) {
 105       value = EntitySpecificsToValue(decrypted);
 106       value->SetBoolean("encrypted", true);
 107     } else {
 108       value = EntitySpecificsToValue(kernel.ref(field));
 109     }
 110     dictionary_value->Set(key, value);
 111   }
 112 }
 113
 114 // Helper functions for SetFieldValues().
 115
 116 base::StringValue* Int64ToValue(int64 i) {
 117   return new base::StringValue(base::Int64ToString(i));
 118 }
 119
 120 base::StringValue* TimeToValue(const base::Time& t) {
 121   return new base::StringValue(GetTimeDebugString(t));
 122 }
 123
 124 base::StringValue* IdToValue(const Id& id) {
 125   return id.ToValue();
 126 }
 127
 128 base::FundamentalValue* BooleanToValue(bool bool_val) {
 129   return new base::FundamentalValue(bool_val);
 130 }
 131
 132 base::StringValue* StringToValue(const std::string& str) {
 133   return new base::StringValue(str);
 134 }
 135
 136 base::StringValue* UniquePositionToValue(const UniquePosition& pos) {
 137   return new base::StringValue(pos.ToDebugString());
 138 }
 139
 140 base::StringValue* AttachmentMetadataToValue(
 141     const sync_pb::AttachmentMetadata& a) {
 142   return new base::StringValue(a.SerializeAsString());
 143 }
 144
 145 }  // namespace
 146
 147 base::DictionaryValue* EntryKernel::ToValue(
 148     Cryptographer* cryptographer) const {
 149   base::DictionaryValue* kernel_info = new base::DictionaryValue();
 150   kernel_info->SetBoolean("isDirty", is_dirty());
 151   kernel_info->Set("serverModelType", ModelTypeToValue(GetServerModelType()));
 152
 153   // Int64 fields.
 154   SetFieldValues(*this, kernel_info,
 155                  &GetMetahandleFieldString, &Int64ToValue,
 156                  INT64_FIELDS_BEGIN, META_HANDLE);
 157   SetFieldValues(*this, kernel_info,
 158                  &GetBaseVersionString, &Int64ToValue,
 159                  META_HANDLE + 1, BASE_VERSION);
 160   SetFieldValues(*this, kernel_info,
 161                  &GetInt64FieldString, &Int64ToValue,
 162                  BASE_VERSION + 1, INT64_FIELDS_END - 1);
 163
 164   // Time fields.
 165   SetFieldValues(*this, kernel_info,
 166                  &GetTimeFieldString, &TimeToValue,
 167                  TIME_FIELDS_BEGIN, TIME_FIELDS_END - 1);
 168
 169   // ID fields.
 170   SetFieldValues(*this, kernel_info,
 171                  &GetIdFieldString, &IdToValue,
 172                  ID_FIELDS_BEGIN, ID_FIELDS_END - 1);
 173
 174   // Bit fields.
 175   SetFieldValues(*this, kernel_info,
 176                  &GetIndexedBitFieldString, &BooleanToValue,
 177                  BIT_FIELDS_BEGIN, INDEXED_BIT_FIELDS_END - 1);
 178   SetFieldValues(*this, kernel_info,
 179                  &GetIsDelFieldString, &BooleanToValue,
 180                  INDEXED_BIT_FIELDS_END, IS_DEL);
 181   SetFieldValues(*this, kernel_info,
 182                  &GetBitFieldString, &BooleanToValue,
 183                  IS_DEL + 1, BIT_FIELDS_END - 1);
 184
 185   // String fields.
 186   {
 187     // Pick out the function overload we want.
 188     SetFieldValues(*this, kernel_info,
 189                    &GetStringFieldString, &StringToValue,
 190                    STRING_FIELDS_BEGIN, STRING_FIELDS_END - 1);
 191   }
 192
 193   // Proto fields.
 194   SetEncryptableProtoValues(*this, cryptographer, kernel_info,
 195                             PROTO_FIELDS_BEGIN, PROTO_FIELDS_END - 1);
 196
 197   // UniquePosition fields
 198   SetFieldValues(*this, kernel_info,
 199                  &GetUniquePositionFieldString, &UniquePositionToValue,
 200                  UNIQUE_POSITION_FIELDS_BEGIN, UNIQUE_POSITION_FIELDS_END - 1);
 201
 202   // AttachmentMetadata fields
 203   SetFieldValues(*this,
 204                  kernel_info,
 205                  &GetAttachmentMetadataFieldString,
 206                  &AttachmentMetadataToValue,
 207                  ATTACHMENT_METADATA_FIELDS_BEGIN,
 208                  ATTACHMENT_METADATA_FIELDS_END - 1);
 209
 210   // Bit temps.
 211   SetFieldValues(*this, kernel_info,
 212                  &GetBitTempString, &BooleanToValue,
 213                  BIT_TEMPS_BEGIN, BIT_TEMPS_END - 1);
 214
 215   return kernel_info;
 216 }
 217
 218 base::ListValue* EntryKernelMutationMapToValue(
 219     const EntryKernelMutationMap& mutations) {
 220   base::ListValue* list = new base::ListValue();
 221   for (EntryKernelMutationMap::const_iterator it = mutations.begin();
 222        it != mutations.end(); ++it) {
 223     list->Append(EntryKernelMutationToValue(it->second));
 224   }
 225   return list;
 226 }
 227
 228 base::DictionaryValue* EntryKernelMutationToValue(
 229     const EntryKernelMutation& mutation) {
 230   base::DictionaryValue* dict = new base::DictionaryValue();
 231   dict->Set("original", mutation.original.ToValue(NULL));
 232   dict->Set("mutated", mutation.mutated.ToValue(NULL));
 233   return dict;
 234 }
 235
 236 }  // namespace syncer
 237 }  // namespace syncable