log.js
1.34 KB
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var logLevel = "info";
function dummy() {}
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;
}
function logGroup(logFn) {
return function(level, msg) {
if (shouldLog(level)) {
logFn(msg);
}
};
}
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);
module.exports.setLogLevel = function(level) {
logLevel = level;
};
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;
}
};