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 namespace {
  60
  61 // Utility function to loop through a set of enum values and add the
  62 // field keys/values in the kernel to the given dictionary.
  63 //
  64 // V should be convertible to Value.
  65 template <class T, class U, class V>
  66 void SetFieldValues(const EntryKernel& kernel,
  67                     base::DictionaryValue* dictionary_value,
  68                     const char* (*enum_key_fn)(T),
  69                     V* (*enum_value_fn)(U),
  70                     int field_key_min, int field_key_max) {
  71   DCHECK_LE(field_key_min, field_key_max);
  72   for (int i = field_key_min; i <= field_key_max; ++i) {
  73     T field = static_cast<T>(i);
  74     const std::string& key = enum_key_fn(field);
  75     V* value = enum_value_fn(kernel.ref(field));
  76     dictionary_value->Set(key, value);
  77   }
  78 }
  79
  80 void SetEncryptableProtoValues(
  81     const EntryKernel& kernel,
  82     Cryptographer* cryptographer,
  83     base::DictionaryValue* dictionary_value,
  84     int field_key_min, int field_key_max) {
  85   DCHECK_LE(field_key_min, field_key_max);
  86   for (int i = field_key_min; i <= field_key_max; ++i) {
  87     ProtoField field = static_cast<ProtoField>(i);
  88     const std::string& key = GetProtoFieldString(field);
  89
  90     base::DictionaryValue* value = NULL;
  91     sync_pb::EntitySpecifics decrypted;
  92     const sync_pb::EncryptedData& encrypted = kernel.ref(field).encrypted();
  93     if (cryptographer &&
  94         kernel.ref(field).has_encrypted() &&
  95         cryptographer->CanDecrypt(encrypted) &&
  96         cryptographer->Decrypt(encrypted, &decrypted)) {
  97       value = EntitySpecificsToValue(decrypted);
  98       value->SetBoolean("encrypted", true);
  99     } else {
 100       value = EntitySpecificsToValue(kernel.ref(field));
 101     }
 102     dictionary_value->Set(key, value);
 103   }
 104 }
 105
 106 // Helper functions for SetFieldValues().
 107
 108 base::StringValue* Int64ToValue(int64 i) {
 109   return new base::StringValue(base::Int64ToString(i));
 110 }
 111
 112 base::StringValue* TimeToValue(const base::Time& t) {
 113   return new base::StringValue(GetTimeDebugString(t));
 114 }
 115
 116 base::StringValue* IdToValue(const Id& id) {
 117   return id.ToValue();
 118 }
 119
 120 base::FundamentalValue* BooleanToValue(bool bool_val) {
 121   return new base::FundamentalValue(bool_val);
 122 }
 123
 124 base::StringValue* StringToValue(const std::string& str) {
 125   return new base::StringValue(str);
 126 }
 127
 128 base::StringValue* UniquePositionToValue(const UniquePosition& pos) {
 129   return new base::StringValue(pos.ToDebugString());
 130 }
 131
 132 base::StringValue* AttachmentMetadataToValue(
 133     const sync_pb::AttachmentMetadata& a) {
 134   return new base::StringValue(a.SerializeAsString());
 135 }
 136
 137 }  // namespace
 138
 139 base::DictionaryValue* EntryKernel::ToValue(
 140     Cryptographer* cryptographer) const {
 141   base::DictionaryValue* kernel_info = new base::DictionaryValue();
 142   kernel_info->SetBoolean("isDirty", is_dirty());
 143   kernel_info->Set("serverModelType", ModelTypeToValue(GetServerModelType()));
 144
 145   // Int64 fields.
 146   SetFieldValues(*this, kernel_info,
 147                  &GetMetahandleFieldString, &Int64ToValue,
 148                  INT64_FIELDS_BEGIN, META_HANDLE);
 149   SetFieldValues(*this, kernel_info,
 150                  &GetBaseVersionString, &Int64ToValue,
 151                  META_HANDLE + 1, BASE_VERSION);
 152   SetFieldValues(*this, kernel_info,
 153                  &GetInt64FieldString, &Int64ToValue,
 154                  BASE_VERSION + 1, INT64_FIELDS_END - 1);
 155
 156   // Time fields.
 157   SetFieldValues(*this, kernel_info,
 158                  &GetTimeFieldString, &TimeToValue,
 159                  TIME_FIELDS_BEGIN, TIME_FIELDS_END - 1);
 160
 161   // ID fields.
 162   SetFieldValues(*this, kernel_info,
 163                  &GetIdFieldString, &IdToValue,
 164                  ID_FIELDS_BEGIN, ID_FIELDS_END - 1);
 165
 166   // Bit fields.
 167   SetFieldValues(*this, kernel_info,
 168                  &GetIndexedBitFieldString, &BooleanToValue,
 169                  BIT_FIELDS_BEGIN, INDEXED_BIT_FIELDS_END - 1);
 170   SetFieldValues(*this, kernel_info,
 171                  &GetIsDelFieldString, &BooleanToValue,
 172                  INDEXED_BIT_FIELDS_END, IS_DEL);
 173   SetFieldValues(*this, kernel_info,
 174                  &GetBitFieldString, &BooleanToValue,
 175                  IS_DEL + 1, BIT_FIELDS_END - 1);
 176
 177   // String fields.
 178   {
 179     // Pick out the function overload we want.
 180     SetFieldValues(*this, kernel_info,
 181                    &GetStringFieldString, &StringToValue,
 182                    STRING_FIELDS_BEGIN, STRING_FIELDS_END - 1);
 183   }
 184
 185   // Proto fields.
 186   SetEncryptableProtoValues(*this, cryptographer, kernel_info,
 187                             PROTO_FIELDS_BEGIN, PROTO_FIELDS_END - 1);
 188
 189   // UniquePosition fields
 190   SetFieldValues(*this, kernel_info,
 191                  &GetUniquePositionFieldString, &UniquePositionToValue,
 192                  UNIQUE_POSITION_FIELDS_BEGIN, UNIQUE_POSITION_FIELDS_END - 1);
 193
 194   // AttachmentMetadata fields
 195   SetFieldValues(*this,
 196                  kernel_info,
 197                  &GetAttachmentMetadataFieldString,
 198                  &AttachmentMetadataToValue,
 199                  ATTACHMENT_METADATA_FIELDS_BEGIN,
 200                  ATTACHMENT_METADATA_FIELDS_END - 1);
 201
 202   // Bit temps.
 203   SetFieldValues(*this, kernel_info,
 204                  &GetBitTempString, &BooleanToValue,
 205                  BIT_TEMPS_BEGIN, BIT_TEMPS_END - 1);
 206
 207   return kernel_info;
 208 }
 209
 210 base::ListValue* EntryKernelMutationMapToValue(
 211     const EntryKernelMutationMap& mutations) {
 212   base::ListValue* list = new base::ListValue();
 213   for (EntryKernelMutationMap::const_iterator it = mutations.begin();
 214        it != mutations.end(); ++it) {
 215     list->Append(EntryKernelMutationToValue(it->second));
 216   }
 217   return list;
 218 }
 219
 220 base::DictionaryValue* EntryKernelMutationToValue(
 221     const EntryKernelMutation& mutation) {
 222   base::DictionaryValue* dict = new base::DictionaryValue();
 223   dict->Set("original", mutation.original.ToValue(NULL));
 224   dict->Set("mutated", mutation.mutated.ToValue(NULL));
 225   return dict;
 226 }
 227
 228 }  // namespace syncer
 229 }  // namespace syncable