[Sync] Make InvalidationNotifier use PushClient

sync/notifier/push_client_channel.h

+// Copyright (c) 2012 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_PUSH_CLIENT_CHANNEL_H_
+#define SYNC_NOTIFIER_PUSH_CLIENT_CHANNEL_H_
+#pragma once
+
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "google/cacheinvalidation/include/system-resources.h"
+#include "jingle/notifier/listener/push_client_observer.h"
+
+namespace notifier {
+class PushClient;
+}  // namespace notifier
+
+namespace sync_notifier {
+
+// A PushClientChannel is an implementation of NetworkChannel that
+// routes messages through a PushClient.
+class PushClientChannel
+    : public invalidation::NetworkChannel,
+      public notifier::PushClientObserver {
+ public:
+  explicit PushClientChannel(scoped_ptr<notifier::PushClient> push_client);
+
+  virtual ~PushClientChannel();
+
+  // If not connected, connects with the given credentials.  If
+  // already connected, the next connection attempt will use the given
+  // credentials.
+  void UpdateCredentials(const std::string& email, const std::string& token);
+
+  // invalidation::NetworkChannel implementation.
+  virtual void SendMessage(const std::string& outgoing_message) OVERRIDE;
+  virtual void SetMessageReceiver(
+      invalidation::MessageCallback* incoming_receiver) OVERRIDE;
+  virtual void AddNetworkStatusReceiver(
+      invalidation::NetworkStatusCallback* network_status_receiver) OVERRIDE;
+  virtual void SetSystemResources(
+      invalidation::SystemResources* resources) OVERRIDE;
+
+  // notifier::PushClient::Observer implementation.
+  virtual void OnNotificationStateChange(bool notifications_enabled) OVERRIDE;
+  virtual void OnIncomingNotification(
+      const notifier::Notification& notification) OVERRIDE;
+
+  const std::string& GetServiceContextForTest() const;
+
+  int64 GetSchedulingHashForTest() const;
+
+  static notifier::Notification EncodeMessageForTest(
+      const std::string& message,
+      const std::string& service_context,
+      int64 scheduling_hash);
+
+  static bool DecodeMessageForTest(
+      const notifier::Notification& notification,
+      std::string* message,
+      std::string* service_context,
+      int64* scheduling_hash);
+
+ private:
+  typedef std::vector<invalidation::NetworkStatusCallback*>
+      NetworkStatusReceiverList;
+
+  static notifier::Notification EncodeMessage(
+      const std::string& message,
+      const std::string& service_context,
+      int64 scheduling_hash);
+
+  static bool DecodeMessage(
+      const notifier::Notification& notification,
+      std::string* message,
+      std::string* service_context,
+      int64* scheduling_hash);
+
+  scoped_ptr<notifier::PushClient> push_client_;
+  scoped_ptr<invalidation::MessageCallback> incoming_receiver_;
+  NetworkStatusReceiverList network_status_receivers_;
+
+  bool notifications_enabled_;
+
+  // Service context.
+  std::string service_context_;
+
+  // Scheduling hash.
+  int64 scheduling_hash_;
+
+  DISALLOW_COPY_AND_ASSIGN(PushClientChannel);
+};
+
+}  // namespace sync_notifier
+
+#endif  // SYNC_NOTIFIER_PUSH_CLIENT_CHANNEL_H_