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_INVALIDATION_GCM_NETWORK_CHANNEL_DELEGATE_H_
6#define COMPONENTS_INVALIDATION_GCM_NETWORK_CHANNEL_DELEGATE_H_
7
8#include <string>
9
10#include "base/callback.h"
11#include "components/gcm_driver/gcm_client.h"
12
13class GoogleServiceAuthError;
14
15namespace syncer {
16
17// Delegate for GCMNetworkChannel.
18// GCMNetworkChannel needs Register to register with GCM client and obtain gcm
19// registration id. This id is used for building URL to cache invalidation
20// endpoint.
21// It needs RequestToken and InvalidateToken to get access token to include it
22// in HTTP message to server.
23// GCMNetworkChannel lives on IO thread therefore calls will be made on IO
24// thread and callbacks should be invoked there as well.
25class GCMNetworkChannelDelegate {
26 public:
27  typedef base::Callback<void(const GoogleServiceAuthError& error,
28                              const std::string& token)> RequestTokenCallback;
29  typedef base::Callback<void(const std::string& registration_id,
30                              gcm::GCMClient::Result result)> RegisterCallback;
31  typedef base::Callback<void(const std::string& message,
32                              const std::string& echo_token)> MessageCallback;
33  typedef base::Callback<void(bool online)> ConnectionStateCallback;
34
35  virtual ~GCMNetworkChannelDelegate() {}
36
37  virtual void Initialize(ConnectionStateCallback callback) = 0;
38  // Request access token. Callback should be called either with access token or
39  // error code.
40  virtual void RequestToken(RequestTokenCallback callback) = 0;
41  // Invalidate access token that was rejected by server.
42  virtual void InvalidateToken(const std::string& token) = 0;
43
44  // Request registration_id from GCMService. Callback should be called with
45  // either registration id or error code.
46  virtual void Register(RegisterCallback callback) = 0;
47  // Provide callback for incoming messages from GCM.
48  virtual void SetMessageReceiver(MessageCallback callback) = 0;
49};
50}  // namespace syncer
51
52#endif  // COMPONENTS_INVALIDATION_GCM_NETWORK_CHANNEL_DELEGATE_H_
53