[sync] skeleton implementation of AutocompleteSyncBridge

components/autofill/core/browser/webdata/autocomplete_sync_bridge.cc

+// Copyright 2016 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 "components/autofill/core/browser/webdata/autocomplete_sync_bridge.h"
+
+#include "base/bind.h"
+#include "base/memory/ptr_util.h"
+#include "components/autofill/core/browser/webdata/autofill_table.h"
+#include "components/autofill/core/browser/webdata/autofill_webdata_backend.h"
+#include "components/autofill/core/browser/webdata/autofill_webdata_service.h"
+#include "components/sync/model/entity_data.h"
+#include "components/sync/model/model_type_change_processor.h"
+#include "components/sync/model/sync_error.h"
+#include "net/base/escape.h"
+
+namespace {
+
+const char kAutocompleteEntryNamespaceTag[] = "autofill_entry|";
+
+void* UserDataKey() {
+  // Use the address of a static that COMDAT folding won't ever collide
+  // with something else.
+  static int user_data_key = 0;
+  return reinterpret_cast<void*>(&user_data_key);
+}
+
+const std::string FormatStorageKey(const std::string name,
+                                   const std::string value) {
+  return net::EscapePath(name) + "|" + net::EscapePath(value);
+}
+
+}  // namespace
+
+namespace autofill {
+
+// static
+void AutocompleteSyncBridge::CreateForWebDataServiceAndBackend(
+    AutofillWebDataService* web_data_service,
+    AutofillWebDataBackend* web_data_backend) {
+  web_data_service->GetDBUserData()->SetUserData(
+      UserDataKey(),
+      new AutocompleteSyncBridge(
+          web_data_backend,
+          base::Bind(&syncer::ModelTypeChangeProcessor::Create)));
+}
+
+// static
+AutocompleteSyncBridge* AutocompleteSyncBridge::FromWebDataService(
+    AutofillWebDataService* web_data_service) {
+  return static_cast<AutocompleteSyncBridge*>(
+      web_data_service->GetDBUserData()->GetUserData(UserDataKey()));
+}
+
+AutocompleteSyncBridge::AutocompleteSyncBridge(
+    AutofillWebDataBackend* backend,
+    const ChangeProcessorFactory& change_processor_factory)
+    : ModelTypeSyncBridge(change_processor_factory, syncer::AUTOFILL),
+      web_data_backend_(backend),
+      scoped_observer_(this) {
+  DCHECK(web_data_backend_);
+
+  scoped_observer_.Add(web_data_backend_);
+}
+
+AutocompleteSyncBridge::~AutocompleteSyncBridge() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+}
+
+// syncer::ModelTypeService implementation.
+std::unique_ptr<syncer::MetadataChangeList>
+AutocompleteSyncBridge::CreateMetadataChangeList() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  NOTIMPLEMENTED();
+  return nullptr;
+}
+
+syncer::SyncError AutocompleteSyncBridge::MergeSyncData(
+    std::unique_ptr<syncer::MetadataChangeList> metadata_change_list,
+    syncer::EntityDataMap entity_data_map) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  NOTIMPLEMENTED();
+  return syncer::SyncError();
+}
+
+syncer::SyncError AutocompleteSyncBridge::ApplySyncChanges(
+    std::unique_ptr<syncer::MetadataChangeList> metadata_change_list,
+    syncer::EntityChangeList entity_changes) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  NOTIMPLEMENTED();
+  return syncer::SyncError();
+}
+void AutocompleteSyncBridge::AutocompleteSyncBridge::GetData(
+    StorageKeyList storage_keys,
+    DataCallback callback) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  NOTIMPLEMENTED();
+}
+
+void AutocompleteSyncBridge::GetAllData(DataCallback callback) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  NOTIMPLEMENTED();
+}
+
+std::string AutocompleteSyncBridge::GetClientTag(
+    const syncer::EntityData& entity_data) {
+  DCHECK(entity_data.specifics.has_autofill());
+
+  const sync_pb::AutofillSpecifics specifics = entity_data.specifics.autofill();
+  std::string storage_key =
+      FormatStorageKey(specifics.name(), specifics.value());
+  std::string prefix(kAutocompleteEntryNamespaceTag);
+  return prefix + storage_key;
+}
+
+std::string AutocompleteSyncBridge::GetStorageKey(
+    const syncer::EntityData& entity_data) {
+  const sync_pb::AutofillSpecifics specifics = entity_data.specifics.autofill();
+  return FormatStorageKey(specifics.name(), specifics.value());
+}
+
+// AutofillWebDataServiceObserverOnDBThread implementation.
+void AutocompleteSyncBridge::AutofillEntriesChanged(
+    const AutofillChangeList& changes) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+}
+
+}  // namespace autofill