node-jet/lib/3_jet/log.js

Jet Realtime Message Bus for the Web. Daemon and Peer implementation.

export var LogLevel;
(function (LogLevel) {
    LogLevel[LogLevel["socket"] = 1] = "socket";
    LogLevel[LogLevel["debug"] = 2] = "debug";
    LogLevel[LogLevel["info"] = 3] = "info";
    LogLevel[LogLevel["warn"] = 4] = "warn";
    LogLevel[LogLevel["error"] = 5] = "error";
    LogLevel[LogLevel["none"] = 6] = "none";
})(LogLevel || (LogLevel = {}));
/**
 * Logger class used for logging. Logging can be done to a file to the console or to any callback
 */
export class Logger {
    logName;
    logLevel;
    callBacks;
    /**
     * Constructor to create a new Logger instance
     * @param settings
     */
    constructor(settings = { logName: 'None' }) {
        this.logName = settings.logName;
        this.logLevel = settings.logLevel || LogLevel.none;
        this.callBacks = settings.logCallbacks;
    }
    /**
     * Function that transforms a message into a string of the format "<Date> <Time> <LogName> <LogLevel> <Message>"
     * @param msg
     * @param level
     * @returns string
     */
    stringBuilder(msg, level) {
        const date = new Date(Date.now());
        return `${date.toLocaleDateString()} ${date.toLocaleTimeString()}\t${this.logName}\t${LogLevel[level]}\t${msg}`;
    }
    /**
     * Function called to log a message. Messages are only logged if the provided message log level is greater then the configured log level
     * @param msg
     * @param level
     * @returns string
     */
    log(msg, level = LogLevel.debug) {
        if (this.logLevel > level) {
            return;
        }
        const logMessage = this.stringBuilder(msg, level);
        if (this.callBacks) {
            this.callBacks.every((cb) => {
                cb(logMessage);
            });
        }
    }
    /**
     * Log a message on the socket level
     * @param msg
     */
    sock(msg) {
        this.log(msg, LogLevel.socket);
    }
    /**
     * Log a message on the debug level
     * @param msg
     */
    debug(msg) {
        this.log(msg, LogLevel.debug);
    }
    /**
     * Log a Info message
     * @param msg
     */
    info(msg) {
        this.log(msg, LogLevel.info);
    }
    /**
     * Log a warn message
     * @param msg
     */
    warn(msg) {
        this.log(msg, LogLevel.warn);
    }
    /**
     * Log an error message
     * @param msg
     */
    error(msg) {
        this.log(msg, LogLevel.error);
    }
}