chatbot-constructor/lib/console_logger.js

A chatbot constructor/builder that can help you develop chatbots in no time either using javascript and nodejs or without programming using excel sheet or JSON format. And it can also easily integrate with AI services like LUIS, Watson, Lex, Octane.AI, Wi

var slice = Array.prototype.slice;
/**
 * RFC 5424 syslog severity levels, see
 * https://tools.ietf.org/html/rfc5424#section-6.2.1
 */
var levels = [
    'emergency',
    'alert',
    'critical',
    'error',
    'warning',
    'notice',
    'info',
    'debug'
];
var levelsByName = levels.reduce(function(out, name, index) {
    out[name] = index;
    return out;
}, {});

function normalizeLogLevel(level) {
    if (typeof level === 'string') {
        level = levelsByName[level];
    }
    if (typeof level === 'number' && level >= 0 && level < levels.length) {
        return level;
    }
    return false;
}

function ConsoleLogger(_console, maxLevel, defaultLevel) {
    _console = _console || console;
    maxLevel = normalizeLogLevel(maxLevel) || 6;
    defaultLevel = normalizeLogLevel(defaultLevel) || 6;
    return {
        log: function(level, message) {
            var normalizedLevel = normalizeLogLevel(level);
            if (!normalizedLevel) {
                message = level;
                normalizedLevel = defaultLevel;
            }
            var levelName = levels[normalizedLevel];
            if (normalizedLevel <= maxLevel) {
                _console.log.apply(
                    _console,
                    [levelName + ': ' + message].concat(slice.call(arguments, 2))
                );
            }
        }
    };
}

ConsoleLogger.LogLevels = levelsByName;

module.exports = ConsoleLogger;