const config = require('config');
const winston = require('winston');
const path = require('path');
const dailyRoateFile = require('winston-daily-rotate-file');// logger directory
let defaultLogDir = 'logs';
if (config.has('logger.path')) {defaultLogDir = config.get('logger.path');
}
const logDir = path.join(path.dirname(__dirname), defaultLogDir);// logger exception file
const exceptionFile = path.join(logDir, 'exceptions.log');
// logger error file
const errorFile = path.join(logDir, 'error.log');
// logger app file
const logFile = path.join(logDir, 'app-%DATE%.log');// logger level
let defaultLogLevel = 'debug';
if (config.has('logger.level')) {defaultLogLevel = config.get('logger.level');
}// logger rotate maxSize
let defaultMaxSize = '50m';
if (config.has('logger.maxSize')) {defaultMaxSize = config.get('logger.maxSize');
}
// logger rotate maxFiles
let defaultMaxFiles = '14d';
if (config.has('logger.maxFiles')) {defaultMaxFiles = config.get('logger.maxFiles');
}// logger formatter
const formatter = winston.format.combine(// string use util.formatwinston.format.splat(),// timestamp to formatwinston.format.timestamp({format: 'YYYY-MM-DD HH:mm:ss.SSS'}),winston.format.printf(info => {return `${info.timestamp} ${info.level}:${info.message}`;})
);// logger transports
const logTransports = [new winston.transports.File({level: 'error',filename: errorFile}),new dailyRoateFile({filename: logFile,datePattern: 'YYYY-MM-DD-HH',maxFiles: defaultMaxFiles,maxSize: defaultMaxSize})
];// create logger instance
const logger = winston.createLogger({level: defaultLogLevel,format: formatter,transports: logTransports,exceptionHandlers: [new winston.transports.File({filename: exceptionFile})],exitOnError: false
});if (process.env['NODE_ENV'] !== 'production') {logger.add(new winston.transports.Console({format: formatter}));
}module.exports = logger;