simpleLogger.js

'use strict';
const fs = require('fs');
/**
 * Simple Logger
 * @author Sparta_EN <nya@sparta0en.org>
 */
class Logger {
    /**
     * Constructor
     * @param {*} settings User settings
     */
    constructor(settings) {
        this.console = settings.CONSOLE;
        this.verbose = settings.DEBUG;
        this.filepath = `${settings.FILEPATH}`;
    }

    /**
     * Output debug info
     * @param {boolean} verbose
     */
    set verbose(verbose) {
        this._verbose = verbose;
    }

    /**
     * Output to file
     * @param {string} filepath
     */
    set filepath(filepath) {
        if (filepath === '') return;
        try {
            this._filestream = fs.createWriteStream(filepath, {
                flags: 'a',
            });
            this._file = true;
        } catch (e) {
            this.error(`Failed to open log file for writing.`);
            this.error(e);
            process.exit(1);
        }
    }

    /**
     * Log to console
     * @param {boolean} console
     */
    set console(console) {
        this._console = true;
    }

    /**
     * Info logging
     * @param {string} message Message
     */
    info(message) {
        this.log('INFO', message);
    }

    /**
     * Debug logging
     * @param {string} message Message
     */
    debug(message) {
        if (this._verbose) {
            this.log('DEBUG', message);
        }
    }

    /**
     * Warning logging
     * @param {string} message
     */
    warn(message) {
        this.log('WARN', message);
    }

    /**
     * Error logging
     * @param {string} message
     */
    error(message) {
        this.log('ERROR', message);
    }

    /**
     * Log writer
     * @param {string} level
     * @param {string} message
     */
    log(level, message) {
        const time = new Date().toISOString();
        if (this._file) {
            this._filestream.write(`[${time}][${level}]: ${message}\n`);
        }
        if (this._console) {
            console.log(`[${time}][${level}]: ${message}`);
        }
    }
}

module.exports = Logger;