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 #ifndef CHROME_BROWSER_EXTENSIONS_API_STORAGE_SETTINGS_SYNC_PROCESSOR_H_ 6 #define CHROME_BROWSER_EXTENSIONS_API_STORAGE_SETTINGS_SYNC_PROCESSOR_H_ 7 8 #include <set> 9 #include <string> 10 11 #include "extensions/browser/value_store/value_store_change.h" 12 #include "sync/api/sync_error.h" 13 14 namespace syncer { 15 class SyncChangeProcessor; 16 } // namespace syncer 17 18 namespace extensions { 19 20 // A wrapper for a SyncChangeProcessor that deals specifically with the syncing 21 // of a single extension's settings. Handles: 22 // - translating SettingChanges into calls into the Sync API. 23 // - deciding whether to ADD/REMOVE/SET depending on the current state of 24 // settings. 25 // - rate limiting (inherently per-extension, which is what we want). 26 class SettingsSyncProcessor { 27 public: 28 SettingsSyncProcessor(const std::string& extension_id, 29 syncer::ModelType type, 30 syncer::SyncChangeProcessor* sync_processor); 31 ~SettingsSyncProcessor(); 32 33 // Initializes this with the initial state of sync. 34 void Init(const base::DictionaryValue& initial_state); 35 36 // Sends |changes| to sync. 37 syncer::SyncError SendChanges(const ValueStoreChangeList& changes); 38 39 // Informs this that |changes| have been receieved from sync. No action will 40 // be taken, but this must be notified for internal bookkeeping. 41 void NotifyChanges(const ValueStoreChangeList& changes); 42 type()43 syncer::ModelType type() { return type_; } 44 45 private: 46 // ID of the extension the changes are for. 47 const std::string extension_id_; 48 49 // Sync model type. Either EXTENSION_SETTING or APP_SETTING. 50 const syncer::ModelType type_; 51 52 // The sync processor used to send changes to sync. 53 syncer::SyncChangeProcessor* const sync_processor_; 54 55 // Whether Init() has been called. 56 bool initialized_; 57 58 // Keys of the settings that are currently being synced. Used to decide what 59 // kind of action (ADD, UPDATE, REMOVE) to send to sync. 60 std::set<std::string> synced_keys_; 61 62 DISALLOW_COPY_AND_ASSIGN(SettingsSyncProcessor); 63 }; 64 65 } // namespace extensions 66 67 #endif // CHROME_BROWSER_EXTENSIONS_API_STORAGE_SETTINGS_SYNC_PROCESSOR_H_ 68