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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef GOOGLE_APIS_GCM_ENGINE_CONNECTION_EVENT_TRACKER_H_
#define GOOGLE_APIS_GCM_ENGINE_CONNECTION_EVENT_TRACKER_H_
#include <stdint.h>
#include "base/containers/circular_deque.h"
#include "google_apis/gcm/base/gcm_export.h"
#include "google_apis/gcm/protocol/mcs.pb.h"
#include "net/base/net_errors.h"
namespace gcm {
class GCM_EXPORT ConnectionEventTracker {
public:
// TODO(harkness): Pass in the storage information.
ConnectionEventTracker();
ConnectionEventTracker(const ConnectionEventTracker&) = delete;
ConnectionEventTracker& operator=(const ConnectionEventTracker&) = delete;
~ConnectionEventTracker();
// Returns a boolean indicating whether an attempt is currently in progress.
bool IsEventInProgress() const;
// Start recording a new connection attempt. This should never be called if
// a connection attempt is already ongoing.
void StartConnectionAttempt();
// Ends the record for a connection attempt and moves it to the completed
// connections list.
void EndConnectionAttempt();
// Record that the existing connection attempt has succeeded. Note that this
// doesn't mean the connection is necessarily valid. It could still fail with
// an authentication error.
void ConnectionAttemptSucceeded();
// Records that the connection succeeded but then failed to login.
void ConnectionLoginFailed();
// Record that the existing connection attempt has failed.
void ConnectionAttemptFailed(int error);
// Write any previous connection information to the |*login_request|.
void WriteToLoginRequest(mcs_proto::LoginRequest* login_request);
private:
// Storage for all the events which have completed.
base::circular_deque<mcs_proto::ClientEvent> completed_events_;
// Current connection attempt.
mcs_proto::ClientEvent current_event_;
// Number of events which were discarded due to exceeding the total number of
// events collected. This is sent to GCM to represent those events.
uint32_t number_discarded_events_ = 0;
};
} // namespace gcm
#endif // GOOGLE_APIS_GCM_ENGINE_CONNECTION_EVENT_TRACKER_H_
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