log.js
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/** @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);
}
}
};
/* eslint-disable node/no-unsupported-features/node-builtins */
var group = console.group || dummy;
var groupCollapsed = console.groupCollapsed || dummy;
var groupEnd = console.groupEnd || dummy;
/* eslint-enable node/no-unsupported-features/node-builtins */
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;
};
/**
* @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;
} else {
return stack;
}
};