chromeos/timezone/timezone_provider.h

   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 CHROMEOS_TIMEZONE_TIMEZONE_PROVIDER_H_
   6 #define CHROMEOS_TIMEZONE_TIMEZONE_PROVIDER_H_
   7
   8 #include "base/macros.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/memory/scoped_vector.h"
  12 #include "base/memory/weak_ptr.h"
  13 #include "base/threading/thread_checker.h"
  14 #include "base/time/time.h"
  15 #include "chromeos/timezone/timezone_request.h"
  16 #include "url/gurl.h"
  17
  18 namespace net {
  19 class URLRequestContextGetter;
  20 }
  21
  22 namespace chromeos {
  23
  24 struct Geoposition;
  25
  26 // This class implements Google TimeZone API.
  27 //
  28 // Note: this should probably be a singleton to monitor requests rate.
  29 // But as it is used only from WizardController, it can be owned by it for now.
  30 class CHROMEOS_EXPORT TimeZoneProvider {
  31  public:
  32   TimeZoneProvider(net::URLRequestContextGetter* url_context_getter,
  33                    const GURL& url);
  34   virtual ~TimeZoneProvider();
  35
  36   // Initiates new request (See TimeZoneRequest for parameters description.)
  37   void RequestTimezone(const Geoposition& position,
  38                        base::TimeDelta timeout,
  39                        TimeZoneRequest::TimeZoneResponseCallback callback);
  40
  41  private:
  42   friend class TestTimeZoneAPIURLFetcherCallback;
  43
  44   // Deletes request from requests_.
  45   void OnTimezoneResponse(TimeZoneRequest* request,
  46                           TimeZoneRequest::TimeZoneResponseCallback callback,
  47                           scoped_ptr<TimeZoneResponseData> timezone,
  48                           bool server_error);
  49
  50   scoped_refptr<net::URLRequestContextGetter> url_context_getter_;
  51   const GURL url_;
  52
  53   // Requests in progress.
  54   // TimeZoneProvider owns all requests, so this vector is deleted on destroy.
  55   ScopedVector<TimeZoneRequest> requests_;
  56
  57   // Creation and destruction should happen on the same thread.
  58   base::ThreadChecker thread_checker_;
  59
  60   DISALLOW_COPY_AND_ASSIGN(TimeZoneProvider);
  61 };
  62
  63 }  // namespace chromeos
  64
  65 #endif  // CHROMEOS_TIMEZONE_TIMEZONE_PROVIDER_H_