blob: 926179d7432645e3dbb4e9e51100fcb5f529b0da [file] [log] [blame]
// Copyright 2014 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 <memory>
#include "base/callback.h"
#include "base/macros.h"
#include "base/threading/thread_checker.h"
#include "chromeos/chromeos_export.h"
#include "net/url_request/url_request_context_getter.h"
#include "url/gurl.h"
class PrefRegistrySimple;
class PrefService;
namespace chromeos {
struct TimeZoneResponseData;
// This class implements periodic timezone synchronization.
class CHROMEOS_EXPORT TimeZoneResolver {
class TimeZoneResolverImpl;
// This callback will be called when new timezone arrives.
using ApplyTimeZoneCallback =
base::Callback<void(const TimeZoneResponseData*)>;
// chromeos::DelayNetworkCall cannot be used directly due to link
// restrictions.
using DelayNetworkCallClosure = base::Callback<void(const base::Closure&)>;
class Delegate {
virtual ~Delegate();
// Returns true if TimeZoneResolver should include WiFi data in request.
virtual bool ShouldSendWiFiGeolocationData() = 0;
// This is a LocalState preference to store base::Time value of the last
// request. It is used to limit request rate on browser restart.
static const char kLastTimeZoneRefreshTime[];
TimeZoneResolver(Delegate* delegate,
scoped_refptr<net::URLRequestContextGetter> context,
const GURL& url,
const ApplyTimeZoneCallback& apply_timezone,
const DelayNetworkCallClosure& delay_network_call,
PrefService* local_state);
// Starts periodic timezone refresh.
void Start();
// Cancels current request and stops periodic timezone refresh.
void Stop();
// Register prefs to LocalState.
static void RegisterPrefs(PrefRegistrySimple* registry);
scoped_refptr<net::URLRequestContextGetter> context() const {
return context_;
DelayNetworkCallClosure delay_network_call() const {
return delay_network_call_;
ApplyTimeZoneCallback apply_timezone() const { return apply_timezone_; }
PrefService* local_state() const { return local_state_; }
// Proxy call to Delegate::ShouldSendWiFiGeolocationData().
bool ShouldSendWiFiGeolocationData() const;
// Expose internal fuctions for testing.
static int MaxRequestsCountForIntervalForTesting(
const double interval_seconds);
static int IntervalForNextRequestForTesting(const int requests);
Delegate* delegate_;
scoped_refptr<net::URLRequestContextGetter> context_;
const GURL url_;
const ApplyTimeZoneCallback apply_timezone_;
const DelayNetworkCallClosure delay_network_call_;
PrefService* local_state_;
std::unique_ptr<TimeZoneResolverImpl> implementation_;
base::ThreadChecker thread_checker_;
} // namespace chromeos