clank.io/lib/logger.js

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var _ = require("./utils");

var currentLevel = "info";
var levels = { "trace": 0, "debug": 1, "info": 2, "warn": 3, "error": 4, "fatal": 5 }

// Logger implementation..
function log(level) {
    // Return a console message depending on the logging level..
    return function (message) {
        if (levels[level] >= levels[currentLevel]) {
            console.log(`[${_.formatDate(new Date())}] ${level}: ${message}`);
        }
    }
}

module.exports = {
    // Change the current logging level..
    setLevel: function(level) {
        currentLevel = level;
    },
    trace: log("trace"),
    debug: log("debug"),
    info: log("info"),
    warn: log("warn"),
    error: log("error"),
    fatal: log("fatal")
};