// Copyright 2014 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef SYNC_NOTIFIER_GCM_NETWORK_CHANNEL_DELEGATE_H_ #define SYNC_NOTIFIER_GCM_NETWORK_CHANNEL_DELEGATE_H_ #include <string> #include "base/callback.h" #include "google_apis/gcm/gcm_client.h" class GoogleServiceAuthError; namespace syncer { // Delegate for GCMNetworkChannel. // GCMNetworkChannel needs Register to register with GCM client and obtain gcm // registration id. This id is used for building URL to cache invalidation // endpoint. // It needs RequestToken and InvalidateToken to get access token to include it // in HTTP message to server. // GCMNetworkChannel lives on IO thread therefore calls will be made on IO // thread and callbacks should be invoked there as well. class GCMNetworkChannelDelegate { public: typedef base::Callback<void(const GoogleServiceAuthError& error, const std::string& token)> RequestTokenCallback; typedef base::Callback<void(const std::string& registration_id, gcm::GCMClient::Result result)> RegisterCallback; typedef base::Callback<void(const std::string& message, const std::string& echo_token)> MessageCallback; virtual ~GCMNetworkChannelDelegate() {} virtual void Initialize() = 0; // Request access token. Callback should be called either with access token or // error code. virtual void RequestToken(RequestTokenCallback callback) = 0; // Invalidate access token that was rejected by server. virtual void InvalidateToken(const std::string& token) = 0; // Request registration_id from GCMProfileService. Callback should be called // with either registration id or error code. virtual void Register(RegisterCallback callback) = 0; // Provide callback for incoming messages from GCM. virtual void SetMessageReceiver(MessageCallback callback) = 0; }; } // namespace syncer #endif // SYNC_NOTIFIER_GCM_NETWORK_CHANNEL_DELEGATE_H_