components/copresence/handlers/gcm_handler.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 COMPONENTS_COPRESENCE_HANDLERS_GCM_HANDLER_H_
   6 #define COMPONENTS_COPRESENCE_HANDLERS_GCM_HANDLER_H_
   7
   8 #include <string>
   9
  10 #include "base/callback_forward.h"
  11
  12 namespace gcm {
  13 class GCMDriver;
  14 }
  15
  16 namespace copresence {
  17
  18 // A class to handle GCM messages from the Copresence server. As far as the
  19 // rest of the system is concerned, it simply provides the registered GCM ID.
  20 // The implementation will call other classes to enact the message contents.
  21 class GCMHandler {
  22  public:
  23   // Callback to report that registration has completed.
  24   // Returns an empty ID if registration failed.
  25   using RegistrationCallback = base::Callback<void(const std::string&)>;
  26
  27   GCMHandler() {}
  28   virtual ~GCMHandler() {}
  29
  30   // Request the GCM ID. It may be returned now or later, via the callback.
  31   virtual void GetGcmId(const RegistrationCallback& callback) = 0;
  32
  33  private:
  34   DISALLOW_COPY_AND_ASSIGN(GCMHandler);
  35 };
  36
  37 }  // namespace copresence
  38
  39 #endif  // COMPONENTS_COPRESENCE_HANDLERS_GCM_HANDLER_H_