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// 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.
#ifndef CHROME_BROWSER_EXTENSIONS_API_STORAGE_SETTINGS_SYNC_PROCESSOR_H_
#define CHROME_BROWSER_EXTENSIONS_API_STORAGE_SETTINGS_SYNC_PROCESSOR_H_
#include <set>
#include <string>
#include "extensions/browser/value_store/value_store_change.h"
#include "sync/api/sync_error.h"
namespace syncer {
class SyncChangeProcessor;
} // namespace syncer
namespace extensions {
// A wrapper for a SyncChangeProcessor that deals specifically with the syncing
// of a single extension's settings. Handles:
// - translating SettingChanges into calls into the Sync API.
// - deciding whether to ADD/REMOVE/SET depending on the current state of
// settings.
// - rate limiting (inherently per-extension, which is what we want).
class SettingsSyncProcessor {
public:
SettingsSyncProcessor(const std::string& extension_id,
syncer::ModelType type,
syncer::SyncChangeProcessor* sync_processor);
~SettingsSyncProcessor();
// Initializes this with the initial state of sync.
void Init(const base::DictionaryValue& initial_state);
// Sends |changes| to sync.
syncer::SyncError SendChanges(const ValueStoreChangeList& changes);
// Informs this that |changes| have been receieved from sync. No action will
// be taken, but this must be notified for internal bookkeeping.
void NotifyChanges(const ValueStoreChangeList& changes);
syncer::ModelType type() { return type_; }
private:
// ID of the extension the changes are for.
const std::string extension_id_;
// Sync model type. Either EXTENSION_SETTING or APP_SETTING.
const syncer::ModelType type_;
// The sync processor used to send changes to sync.
syncer::SyncChangeProcessor* const sync_processor_;
// Whether Init() has been called.
bool initialized_;
// Keys of the settings that are currently being synced. Used to decide what
// kind of action (ADD, UPDATE, REMOVE) to send to sync.
std::set<std::string> synced_keys_;
DISALLOW_COPY_AND_ASSIGN(SettingsSyncProcessor);
};
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_API_STORAGE_SETTINGS_SYNC_PROCESSOR_H_
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