1 /**

     2  * DJM-Fix

     3  * Copyright © 2020 František Kučera (Frantovo.cz, GlobalCode.info)

     4  *

     5  * This program is free software: you can redistribute it and/or modify

     6  * it under the terms of the GNU General Public License as published by

     7  * the Free Software Foundation, version 3 of the License.

     8  *

     9  * This program is distributed in the hope that it will be useful,

    10  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

    12  * GNU General Public License for more details.

    13  *

    14  * You should have received a copy of the GNU General Public License

    15  * along with this program. If not, see <http://www.gnu.org/licenses/>.

    16  */

    17 #include <chrono>

    18 #include <iomanip>

    19 #include <sstream>

    20 

    21 #include "Logger.h"

    22 

    23 namespace djmfix {

    24 namespace logging {

    25 

    26 class Blackhole : public Logger {

    27 public:

    28 

    29 	virtual void log(Level level, const std::string& message) override {

    30 	}

    31 };

    32 

    33 class LoggerImpl : public Logger {

    34 private:

    35 	std::ostream& output;

    36 	Level minLevel;

    37 

    38 	std::string getTimestamp() {

    39 		auto now = std::chrono::system_clock::now();

    40 		auto itt = std::chrono::system_clock::to_time_t(now);

    41 		std::ostringstream ss;

    42 		ss << std::put_time(localtime(&itt), "%FT%T%z");

    43 		return ss.str();

    44 	}

    45 

    46 	std::string toString(Level level) {

    47 		if (level == Level::SEVERE) return "SEVERE";

    48 		else if (level == Level::WARNING) return "WARNING";

    49 		else if (level == Level::INFO) return "INFO";

    50 		else if (level == Level::CONFIG) return "CONFIG";

    51 		else if (level == Level::FINE) return "FINE";

    52 		else if (level == Level::FINER) return "FINER";

    53 		else if (level == Level::FINEST) return "FINEST";

    54 		else return "UNKNOWN";

    55 	}

    56 

    57 public:

    58 

    59 	LoggerImpl(std::ostream& output, Level minLevel) : output(output), minLevel(minLevel) {

    60 	}

    61 

    62 	virtual void log(Level level, const std::string& message) override {

    63 		if (level <= minLevel) {

    64 			output << getTimestamp() << " " << std::setw(8) << toString(level) << ":  " << message << std::endl;

    65 		}

    66 	}

    67 };

    68 

    69 Logger* create(std::ostream& output, Level minLevel) {

    70 	return new LoggerImpl(output, minLevel);

    71 }

    72 

    73 Logger* blackhole() {

    74 	return new Blackhole();

    75 }

    76 

    77 }

    78 }