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// Copyright 2016 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 CHROME_BROWSER_MEDIA_WEBRTC_WEBRTC_TEXT_LOG_HANDLER_H_
#define CHROME_BROWSER_MEDIA_WEBRTC_WEBRTC_TEXT_LOG_HANDLER_H_
#include <map>
#include <memory>
#include <string>
#include "base/callback.h"
#include "base/memory/weak_ptr.h"
#include "base/sequence_checker.h"
#include "chrome/browser/media/webrtc/webrtc_log_uploader.h"
#include "net/base/network_interfaces.h"
namespace chrome {
namespace mojom {
class WebRtcLoggingMessage;
} // namespace mojom
} // namespace chrome
class WebRtcLogBuffer;
class WebRtcTextLogHandler {
public:
// States used for protecting from function calls made at non-allowed points
// in time. For example, StartLogging() is only allowed in CLOSED state.
// See also comment on |channel_is_closing_| below.
// Transitions: SetMetaData(): CLOSED -> CLOSED, or
// STARTED -> STARTED
// StartLogging(): CLOSED -> STARTING.
// StartDone(): STARTING -> STARTED.
// StopLogging(): STARTED -> STOPPING.
// StopDone(): STOPPING -> STOPPED.
// DiscardLog(): STOPPED -> CLOSED.
// ReleaseLog(): STOPPED -> CLOSED.
enum LoggingState {
CLOSED, // Logging not started, no log in memory.
STARTING, // Start logging is in progress.
STARTED, // Logging started.
STOPPING, // Stop logging is in progress.
STOPPED, // Logging has been stopped, log still open in memory.
};
typedef base::Callback<void(bool, const std::string&)> GenericDoneCallback;
explicit WebRtcTextLogHandler(int render_process_id);
~WebRtcTextLogHandler();
// Returns the current state of the log.
LoggingState GetState() const;
// Returns true if channel is closing.
bool GetChannelIsClosing() const;
// Sets meta data for log uploading. Merged with any already set meta data.
// Values for existing keys are overwritten. The meta data already set at log
// start is written to the beginning of the log. Meta data set after log start
// is written to the log at that time.
void SetMetaData(std::unique_ptr<WebRtcLogMetaDataMap> meta_data,
const GenericDoneCallback& callback);
// Opens a log and starts logging if allowed by the LogUploader.
// Returns false if logging could not be started.
bool StartLogging(WebRtcLogUploader* log_uploader,
const GenericDoneCallback& callback);
// Stops logging. Log will remain open until UploadLog or DiscardLog is
// called.
bool StopLogging(const GenericDoneCallback& callback);
// Called by the WebRtcLoggingHandlerHost when logging has stopped in the
// renderer. Should only be called in response to a
// WebRtcLoggingMsg_LoggingStopped IPC message.
void StopDone();
// Signals that the renderer is closing, which de facto stops logging but
// keeps the log in memory.
// Can be called in any state except CLOSED.
void ChannelClosing();
// Discards a stopped log.
void DiscardLog();
// Releases a stopped log to the caller.
void ReleaseLog(std::unique_ptr<WebRtcLogBuffer>* log_buffer,
std::unique_ptr<WebRtcLogMetaDataMap>* meta_data);
// Adds a message to the log.
void LogMessage(const std::string& message);
// Adds a message to the log.
void LogWebRtcLoggingMessage(
const chrome::mojom::WebRtcLoggingMessage* message);
// Returns true if the logging state is CLOSED and fires an the callback
// with an error message otherwise.
bool ExpectLoggingStateStopped(const GenericDoneCallback& callback);
void FireGenericDoneCallback(const GenericDoneCallback& callback,
bool success,
const std::string& error_message);
void SetWebAppId(int web_app_id);
private:
void StartDone(const GenericDoneCallback& callback);
void LogToCircularBuffer(const std::string& message);
void OnGetNetworkInterfaceList(
const GenericDoneCallback& callback,
const base::Optional<net::NetworkInterfaceList>& networks);
SEQUENCE_CHECKER(sequence_checker_);
// The render process ID this object belongs to.
const int render_process_id_;
// Should be created by StartLogging().
std::unique_ptr<WebRtcLogBuffer> log_buffer_;
// Should be created by StartLogging().
std::unique_ptr<WebRtcLogMetaDataMap> meta_data_;
GenericDoneCallback stop_callback_;
LoggingState logging_state_;
// True if renderer is closing. The log (if there is one) can still be
// released or discarded (i.e. closed). No new logs can be created. The only
// state change possible when channel is closing is from any state to CLOSED.
bool channel_is_closing_ = false;
// The system time in ms when logging is started. Reset when logging_state_
// changes to STOPPED.
base::Time logging_started_time_;
// Web app id used for statistics. See
// |WebRtcLoggingHandlerHost::web_app_id_|.
int web_app_id_ = 0;
base::WeakPtrFactory<WebRtcTextLogHandler> weak_factory_{this};
DISALLOW_COPY_AND_ASSIGN(WebRtcTextLogHandler);
};
#endif // CHROME_BROWSER_MEDIA_WEBRTC_WEBRTC_TEXT_LOG_HANDLER_H_
|
