chromeos/timezone/timezone_provider.cc

   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 #include "chromeos/timezone/timezone_provider.h"
   6
   7 #include <algorithm>
   8 #include <iterator>
   9
  10 #include "base/bind.h"
  11 #include "base/logging.h"
  12 #include "base/time/time.h"
  13 #include "chromeos/geolocation/geoposition.h"
  14 #include "net/url_request/url_request_context_getter.h"
  15 #include "url/gurl.h"
  16
  17 namespace chromeos {
  18
  19 TimeZoneProvider::TimeZoneProvider(
  20     net::URLRequestContextGetter* url_context_getter,
  21     const GURL& url)
  22     : url_context_getter_(url_context_getter), url_(url) {
  23 }
  24
  25 TimeZoneProvider::~TimeZoneProvider() {
  26   DCHECK(thread_checker_.CalledOnValidThread());
  27 }
  28
  29 void TimeZoneProvider::RequestTimezone(
  30     const Geoposition& position,
  31     base::TimeDelta timeout,
  32     TimeZoneRequest::TimeZoneResponseCallback callback) {
  33   TimeZoneRequest* request(new TimeZoneRequest(
  34       url_context_getter_.get(), url_, position,timeout));
  35   requests_.push_back(request);
  36
  37   // TimeZoneProvider owns all requests. It is safe to pass unretained "this"
  38   // because destruction of TimeZoneProvider cancels all requests.
  39   TimeZoneRequest::TimeZoneResponseCallback callback_tmp(
  40       base::Bind(&TimeZoneProvider::OnTimezoneResponse,
  41                  base::Unretained(this),
  42                  request,
  43                  callback));
  44   request->MakeRequest(callback_tmp);
  45 }
  46
  47 void TimeZoneProvider::OnTimezoneResponse(
  48     TimeZoneRequest* request,
  49     TimeZoneRequest::TimeZoneResponseCallback callback,
  50     scoped_ptr<TimeZoneResponseData> timezone,
  51     bool server_error) {
  52   ScopedVector<TimeZoneRequest>::iterator new_end =
  53       std::remove(requests_.begin(), requests_.end(), request);
  54   DCHECK_EQ(std::distance(new_end, requests_.end()), 1);
  55   requests_.erase(new_end, requests_.end());
  56
  57   callback.Run(timezone.Pass(), server_error);
  58 }
  59
  60 }  // namespace chromeos