1 // Copyright 2014 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 COMPONENTS_SYNC_DRIVER_LOCAL_DEVICE_INFO_PROVIDER_H_ 6 #define COMPONENTS_SYNC_DRIVER_LOCAL_DEVICE_INFO_PROVIDER_H_ 7 8 #include <string> 9 #include "base/callback_list.h" 10 11 namespace sync_driver { 12 13 class DeviceInfo; 14 15 // Interface for providing sync specific informaiton about the 16 // local device. 17 class LocalDeviceInfoProvider { 18 public: 19 typedef base::CallbackList<void(void)>::Subscription Subscription; 20 ~LocalDeviceInfoProvider()21 virtual ~LocalDeviceInfoProvider() {} 22 23 // Returns sync's representation of the local device info; 24 // NULL if the device info is unavailable. 25 // The returned object is fully owned by LocalDeviceInfoProvider (must not 26 // be freed by the caller). It remains valid until LocalDeviceInfoProvider 27 // is destroyed. 28 virtual const DeviceInfo* GetLocalDeviceInfo() const = 0; 29 30 // Returns a GUID string used for creation of the machine tag for 31 // this local session; an empty sting if LocalDeviceInfoProvider hasn't been 32 // initialized yet. 33 virtual std::string GetLocalSyncCacheGUID() const = 0; 34 35 // Starts initializing local device info. 36 virtual void Initialize( 37 const std::string& cache_guid, 38 const std::string& signin_scoped_device_id) = 0; 39 40 // Registers a callback to be called when local device info becomes available. 41 // The callback will remain registered until the 42 // returned Subscription is destroyed, which must occur before the 43 // CallbackList is destroyed. 44 virtual scoped_ptr<Subscription> RegisterOnInitializedCallback( 45 const base::Closure& callback) = 0; 46 }; 47 48 } // namespace sync_driver 49 50 #endif // COMPONENTS_SYNC_DRIVER_LOCAL_DEVICE_INFO_PROVIDER_H_ 51