@obsidize/logger/core/logger.js

A tiny javascript logging library

import { LogEventGuard } from './log-event-guard';
import { LogLevel } from './log-level';
/**
 * Common logging interface to be used on a per-module basis.
 * Can be configured to suppress events based on a custom filter,
 * or disabled entirely.
 *
 * Events produced by an instance of this class will be
 * passed along to the assigned interceptor for further
 * processing / outlet handling.
 */
export class Logger extends LogEventGuard {
    constructor(tag, interceptor) {
        super();
        this.tag = tag;
        this.interceptor = interceptor;
    }
    verbose(message, ...params) {
        this.emit(LogLevel.VERBOSE, message, params);
    }
    trace(message, ...params) {
        this.emit(LogLevel.TRACE, message, params);
    }
    debug(message, ...params) {
        this.emit(LogLevel.DEBUG, message, params);
    }
    log(message, ...params) {
        this.emit(LogLevel.DEBUG, message, params);
    }
    info(message, ...params) {
        this.emit(LogLevel.INFO, message, params);
    }
    warn(message, ...params) {
        this.emit(LogLevel.WARN, message, params);
    }
    error(message, ...params) {
        this.emit(LogLevel.ERROR, message, params);
    }
    fatal(message, ...params) {
        this.emit(LogLevel.FATAL, message, params);
    }
    emit(level, message, params, timestamp) {
        const ev = this.interceptor.createEvent(level, this.tag, message, params, timestamp);
        if (this.test(ev)) {
            this.interceptor.interceptEvent(ev);
        }
    }
}