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// Copyright 2017 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 COMPONENTS_NTP_SNIPPETS_LOGGER_H_
#define COMPONENTS_NTP_SNIPPETS_LOGGER_H_
#include <string>
#include "base/containers/circular_deque.h"
#include "base/location.h"
#include "base/time/time.h"
namespace ntp_snippets {
class Logger {
public:
Logger();
~Logger();
// The call is ignored if the logging is disabled. However, if constructing a
// message is not cheap, do it only if |IsLoggingEnabled| returns true.
void Log(const base::Location& from_here, const std::string& message);
std::string GetHumanReadableLog() const;
static bool IsLoggingEnabled();
static std::string TimeToString(const base::Time& time);
private:
struct LogItem {
std::string message;
base::Time time;
base::Location from_where;
LogItem(const std::string& message,
const base::Time time,
const base::Location& from_where);
std::string ToString() const;
};
// New items should be pushed back.
base::circular_deque<LogItem> logged_items_;
};
} // namespace ntp_snippets
#endif // COMPONENTS_NTP_SNIPPETS_LOGGER_H_
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