text: /*
   *    Copyright (c) 2020, The OpenThread Authors.
   *    All rights reserved.
   *
   *    Redistribution and use in source and binary forms, with or without
   *    modification, are permitted provided that the following conditions are met:
   *    1. Redistributions of source code must retain the above copyright
   *       notice, this list of conditions and the following disclaimer.
   *    2. Redistributions in binary form must reproduce the above copyright
   *       notice, this list of conditions and the following disclaimer in the
   *       documentation and/or other materials provided with the distribution.
   *    3. Neither the name of the copyright holder nor the
   *       names of its contributors may be used to endorse or promote products
   *       derived from this software without specific prior written permission.
   *
   *    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   *    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   *    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   *    ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
   *    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   *    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   *    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   *    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   *    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   *    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   *    POSSIBILITY OF SUCH DAMAGE.
   */
  
  /**
   * @file
   *  This file defines file logger.
   *
   */
  
  #ifndef OT_COMM_APP_FILE_LOGGER_HPP_
  #define OT_COMM_APP_FILE_LOGGER_HPP_
  
  #include <fstream>
  #include <string>
  
  #include <commissioner/commissioner.hpp>
  
  namespace ot {
  
  namespace commissioner {
  
  /**
   * @brief An implementation of the Logger interface that write log to a text file.
   *
   */
  class FileLogger : public Logger
  {
  public:
      /**
       * The constructor with given log file name and minimum log level.
       *
       * @param[in] aFilename  The log file name.
       * @param[in] aLogLevel  The minimum log level. Log messages with a lower
       *                       log level than this will be dropped silently.
       *
       */
      FileLogger(const std::string &aFilename, LogLevel aLogLevel);
  
      void Log(LogLevel aLevel, const std::string &aMsg) override;
  
  private:
      std::ofstream mFileStream;
      LogLevel      mLogLevel;
  };
  
  } // namespace commissioner
  
  } // namespace ot
  
  #endif // OT_COMM_APP_FILE_LOGGER_HPP_
  