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 13 class GoogleServiceAuthError; 14 15 namespace 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. 25 class 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 ~GCMNetworkChannelDelegate()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