source: frontend/node_modules/webpack/hot/log.js

/** @typedef {"info" | "warning" | "error"} LogLevel */

/** @type {LogLevel} */
var logLevel = "info";

function dummy() {}

/**
 * @param {LogLevel} level log level
 * @returns {boolean} true, if should log
 */
function shouldLog(level) {
        var shouldLog =
                (logLevel === "info" && level === "info") ||
                (["info", "warning"].indexOf(logLevel) >= 0 && level === "warning") ||
                (["info", "warning", "error"].indexOf(logLevel) >= 0 && level === "error");
        return shouldLog;
}

/**
 * @param {(msg?: string) => void} logFn log function
 * @returns {(level: LogLevel, msg?: string) => void} function that logs when log level is sufficient
 */
function logGroup(logFn) {
        return function (level, msg) {
                if (shouldLog(level)) {
                        logFn(msg);
                }
        };
}

/**
 * @param {LogLevel} level log level
 * @param {string|Error} msg message
 */
module.exports = function (level, msg) {
        if (shouldLog(level)) {
                if (level === "info") {
                        console.log(msg);
                } else if (level === "warning") {
                        console.warn(msg);
                } else if (level === "error") {
                        console.error(msg);
                }
        }
};

/**
 * @param {Error} err error
 * @returns {string} formatted error
 */
module.exports.formatError = function (err) {
        var message = err.message;
        var stack = err.stack;
        if (!stack) {
                return message;
        } else if (stack.indexOf(message) < 0) {
                return message + "\n" + stack;
        }
        return stack;
};

var group = console.group || dummy;
var groupCollapsed = console.groupCollapsed || dummy;
var groupEnd = console.groupEnd || dummy;

module.exports.group = logGroup(group);

module.exports.groupCollapsed = logGroup(groupCollapsed);

module.exports.groupEnd = logGroup(groupEnd);

/**
 * @param {LogLevel} level log level
 */
module.exports.setLogLevel = function (level) {
        logLevel = level;
};