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