Implemented initial version of themes syncing (behind a flag).

BUG=32414
TEST=manual,unittests,trybot

Review URL: http://codereview.chromium.org/1399001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@42984 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 111 insertions, 0 deletions

diff --git a/chrome/browser/sync/glue/theme_model_associator.cc b/chrome/browser/sync/glue/theme_model_associator.cc
new file mode 100644
index 0000000..c4f87ce
--- /dev/null
+++ b/chrome/browser/sync/glue/theme_model_associator.cc
@@ -0,0 +1,111 @@
+// Copyright (c) 2010 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/sync/glue/theme_model_associator.h"
+
+#include "base/basictypes.h"
+#include "base/logging.h"
+#include "base/utf_string_conversions.h"
+#include "chrome/browser/browser_theme_provider.h"
+#include "chrome/browser/sync/engine/syncapi.h"
+#include "chrome/browser/sync/glue/sync_backend_host.h"
+#include "chrome/browser/sync/glue/theme_util.h"
+#include "chrome/browser/sync/profile_sync_service.h"
+#include "chrome/browser/sync/protocol/theme_specifics.pb.h"
+#include "chrome/browser/sync/unrecoverable_error_handler.h"
+
+namespace browser_sync {
+
+namespace {
+
+static const char kThemesTag[] = "google_chrome_themes";
+static const char kCurrentThemeNodeTitle[] = "Current Theme";
+
+static const char kNoThemesFolderError[] =
+    "Server did not create the top-level themes node. We "
+    "might be running against an out-of-date server.";
+
+}  // namespace
+
+ThemeModelAssociator::ThemeModelAssociator(
+    ProfileSyncService* sync_service,
+    UnrecoverableErrorHandler* error_handler)
+    : sync_service_(sync_service),
+      error_handler_(error_handler) {
+  DCHECK(sync_service_);
+  DCHECK(error_handler_);
+}
+
+ThemeModelAssociator::~ThemeModelAssociator() {}
+
+bool ThemeModelAssociator::AssociateModels() {
+  sync_api::WriteTransaction trans(
+      sync_service_->backend()->GetUserShareHandle());
+  sync_api::ReadNode root(&trans);
+  if (!root.InitByTagLookup(kThemesTag)) {
+    LOG(ERROR) << kNoThemesFolderError;
+    error_handler_->OnUnrecoverableError();
+    return false;
+  }
+
+  Profile* profile = sync_service_->profile();
+  sync_api::ReadNode node(&trans);
+  // TODO(akalin): When we have timestamps, we may want to do
+  // something more intelligent than preferring the sync data over our
+  // local data.
+  if (node.InitByClientTagLookup(syncable::THEMES, kCurrentThemeClientTag)) {
+    // Update the current theme from the sync data.
+    // TODO(akalin): If the sync data does not have
+    // use_system_theme_by_default and we do, update that flag on the
+    // sync data.
+    SetCurrentThemeFromThemeSpecificsIfNecessary(
+        node.GetThemeSpecifics(), profile);
+  } else {
+    // Set the sync data from the current theme.
+    sync_api::WriteNode node(&trans);
+    if (!node.InitUniqueByCreation(syncable::THEMES, root,
+                                   kCurrentThemeClientTag)) {
+      LOG(ERROR) << "Could not create current theme node.";
+      error_handler_->OnUnrecoverableError();
+      return false;
+    }
+    node.SetIsFolder(false);
+    node.SetTitle(UTF8ToWide(kCurrentThemeNodeTitle));
+    sync_pb::ThemeSpecifics theme_specifics;
+    GetThemeSpecificsFromCurrentTheme(profile, &theme_specifics);
+    node.SetThemeSpecifics(theme_specifics);
+  }
+  return true;
+}
+
+bool ThemeModelAssociator::DisassociateModels() {
+  // We don't maintain any association state, so nothing to do.
+  return true;
+}
+
+bool ThemeModelAssociator::SyncModelHasUserCreatedNodes(bool* has_nodes) {
+  DCHECK(has_nodes);
+  *has_nodes = false;
+  sync_api::ReadTransaction trans(
+      sync_service_->backend()->GetUserShareHandle());
+  sync_api::ReadNode root(&trans);
+  if (!root.InitByTagLookup(kThemesTag)) {
+    error_handler_->OnUnrecoverableError();
+    LOG(ERROR) << kNoThemesFolderError;
+    return false;
+  }
+  // The sync model has user created nodes iff the themes folder has
+  // any children.
+  *has_nodes = root.GetFirstChildId() != sync_api::kInvalidId;
+  return true;
+}
+
+bool ThemeModelAssociator::ChromeModelHasUserCreatedNodes(bool* has_nodes) {
+  DCHECK(has_nodes);
+  // Assume the themes model always has user-created nodes.
+  *has_nodes = true;
+  return true;
+}
+
+}  // namespace browser_sync