298 lines
9.3 KiB
JavaScript
298 lines
9.3 KiB
JavaScript
|
/*
|
||
|
|
* loglevel - https://github.com/pimterry/loglevel
|
||
|
|
*
|
||
|
|
* Copyright (c) 2013 Tim Perry
|
||
|
|
* Licensed under the MIT license.
|
||
|
|
*/
|
||
|
|
(function (root, definition) {
|
||
|
|
"use strict";
|
||
|
|
if (typeof define === 'function' && define.amd) {
|
||
|
|
define(definition);
|
||
|
|
} else if (typeof module === 'object' && module.exports) {
|
||
|
|
module.exports = definition();
|
||
|
|
} else {
|
||
|
|
root.log = definition();
|
||
|
|
}
|
||
|
|
}(this, function () {
|
||
|
|
"use strict";
|
||
|
|
|
||
|
|
// Slightly dubious tricks to cut down minimized file size
|
||
|
|
var noop = function() {};
|
||
|
|
var undefinedType = "undefined";
|
||
|
|
var isIE = (typeof window !== undefinedType) && (typeof window.navigator !== undefinedType) && (
|
||
|
|
/Trident\/|MSIE /.test(window.navigator.userAgent)
|
||
|
|
);
|
||
|
|
|
||
|
|
var logMethods = [
|
||
|
|
"trace",
|
||
|
|
"debug",
|
||
|
|
"info",
|
||
|
|
"warn",
|
||
|
|
"error"
|
||
|
|
];
|
||
|
|
|
||
|
|
// Cross-browser bind equivalent that works at least back to IE6
|
||
|
|
function bindMethod(obj, methodName) {
|
||
|
|
var method = obj[methodName];
|
||
|
|
if (typeof method.bind === 'function') {
|
||
|
|
return method.bind(obj);
|
||
|
|
} else {
|
||
|
|
try {
|
||
|
|
return Function.prototype.bind.call(method, obj);
|
||
|
|
} catch (e) {
|
||
|
|
// Missing bind shim or IE8 + Modernizr, fallback to wrapping
|
||
|
|
return function() {
|
||
|
|
return Function.prototype.apply.apply(method, [obj, arguments]);
|
||
|
|
};
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Trace() doesn't print the message in IE, so for that case we need to wrap it
|
||
|
|
function traceForIE() {
|
||
|
|
if (console.log) {
|
||
|
|
if (console.log.apply) {
|
||
|
|
console.log.apply(console, arguments);
|
||
|
|
} else {
|
||
|
|
// In old IE, native console methods themselves don't have apply().
|
||
|
|
Function.prototype.apply.apply(console.log, [console, arguments]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (console.trace) console.trace();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Build the best logging method possible for this env
|
||
|
|
// Wherever possible we want to bind, not wrap, to preserve stack traces
|
||
|
|
function realMethod(methodName) {
|
||
|
|
if (methodName === 'debug') {
|
||
|
|
methodName = 'log';
|
||
|
|
}
|
||
|
|
|
||
|
|
if (typeof console === undefinedType) {
|
||
|
|
return false; // No method possible, for now - fixed later by enableLoggingWhenConsoleArrives
|
||
|
|
} else if (methodName === 'trace' && isIE) {
|
||
|
|
return traceForIE;
|
||
|
|
} else if (console[methodName] !== undefined) {
|
||
|
|
return bindMethod(console, methodName);
|
||
|
|
} else if (console.log !== undefined) {
|
||
|
|
return bindMethod(console, 'log');
|
||
|
|
} else {
|
||
|
|
return noop;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// These private functions always need `this` to be set properly
|
||
|
|
|
||
|
|
function replaceLoggingMethods(level, loggerName) {
|
||
|
|
/*jshint validthis:true */
|
||
|
|
for (var i = 0; i < logMethods.length; i++) {
|
||
|
|
var methodName = logMethods[i];
|
||
|
|
this[methodName] = (i < level) ?
|
||
|
|
noop :
|
||
|
|
this.methodFactory(methodName, level, loggerName);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Define log.log as an alias for log.debug
|
||
|
|
this.log = this.debug;
|
||
|
|
}
|
||
|
|
|
||
|
|
// In old IE versions, the console isn't present until you first open it.
|
||
|
|
// We build realMethod() replacements here that regenerate logging methods
|
||
|
|
function enableLoggingWhenConsoleArrives(methodName, level, loggerName) {
|
||
|
|
return function () {
|
||
|
|
if (typeof console !== undefinedType) {
|
||
|
|
replaceLoggingMethods.call(this, level, loggerName);
|
||
|
|
this[methodName].apply(this, arguments);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
// By default, we use closely bound real methods wherever possible, and
|
||
|
|
// otherwise we wait for a console to appear, and then try again.
|
||
|
|
function defaultMethodFactory(methodName, level, loggerName) {
|
||
|
|
/*jshint validthis:true */
|
||
|
|
return realMethod(methodName) ||
|
||
|
|
enableLoggingWhenConsoleArrives.apply(this, arguments);
|
||
|
|
}
|
||
|
|
|
||
|
|
function Logger(name, defaultLevel, factory) {
|
||
|
|
var self = this;
|
||
|
|
var currentLevel;
|
||
|
|
defaultLevel = defaultLevel == null ? "WARN" : defaultLevel;
|
||
|
|
|
||
|
|
var storageKey = "loglevel";
|
||
|
|
if (typeof name === "string") {
|
||
|
|
storageKey += ":" + name;
|
||
|
|
} else if (typeof name === "symbol") {
|
||
|
|
storageKey = undefined;
|
||
|
|
}
|
||
|
|
|
||
|
|
function persistLevelIfPossible(levelNum) {
|
||
|
|
var levelName = (logMethods[levelNum] || 'silent').toUpperCase();
|
||
|
|
|
||
|
|
if (typeof window === undefinedType || !storageKey) return;
|
||
|
|
|
||
|
|
// Use localStorage if available
|
||
|
|
try {
|
||
|
|
window.localStorage[storageKey] = levelName;
|
||
|
|
return;
|
||
|
|
} catch (ignore) {}
|
||
|
|
|
||
|
|
// Use session cookie as fallback
|
||
|
|
try {
|
||
|
|
window.document.cookie =
|
||
|
|
encodeURIComponent(storageKey) + "=" + levelName + ";";
|
||
|
|
} catch (ignore) {}
|
||
|
|
}
|
||
|
|
|
||
|
|
function getPersistedLevel() {
|
||
|
|
var storedLevel;
|
||
|
|
|
||
|
|
if (typeof window === undefinedType || !storageKey) return;
|
||
|
|
|
||
|
|
try {
|
||
|
|
storedLevel = window.localStorage[storageKey];
|
||
|
|
} catch (ignore) {}
|
||
|
|
|
||
|
|
// Fallback to cookies if local storage gives us nothing
|
||
|
|
if (typeof storedLevel === undefinedType) {
|
||
|
|
try {
|
||
|
|
var cookie = window.document.cookie;
|
||
|
|
var location = cookie.indexOf(
|
||
|
|
encodeURIComponent(storageKey) + "=");
|
||
|
|
if (location !== -1) {
|
||
|
|
storedLevel = /^([^;]+)/.exec(cookie.slice(location))[1];
|
||
|
|
}
|
||
|
|
} catch (ignore) {}
|
||
|
|
}
|
||
|
|
|
||
|
|
// If the stored level is not valid, treat it as if nothing was stored.
|
||
|
|
if (self.levels[storedLevel] === undefined) {
|
||
|
|
storedLevel = undefined;
|
||
|
|
}
|
||
|
|
|
||
|
|
return storedLevel;
|
||
|
|
}
|
||
|
|
|
||
|
|
function clearPersistedLevel() {
|
||
|
|
if (typeof window === undefinedType || !storageKey) return;
|
||
|
|
|
||
|
|
// Use localStorage if available
|
||
|
|
try {
|
||
|
|
window.localStorage.removeItem(storageKey);
|
||
|
|
return;
|
||
|
|
} catch (ignore) {}
|
||
|
|
|
||
|
|
// Use session cookie as fallback
|
||
|
|
try {
|
||
|
|
window.document.cookie =
|
||
|
|
encodeURIComponent(storageKey) + "=; expires=Thu, 01 Jan 1970 00:00:00 UTC";
|
||
|
|
} catch (ignore) {}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
*
|
||
|
|
* Public logger API - see https://github.com/pimterry/loglevel for details
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
self.name = name;
|
||
|
|
|
||
|
|
self.levels = { "TRACE": 0, "DEBUG": 1, "INFO": 2, "WARN": 3,
|
||
|
|
"ERROR": 4, "SILENT": 5};
|
||
|
|
|
||
|
|
self.methodFactory = factory || defaultMethodFactory;
|
||
|
|
|
||
|
|
self.getLevel = function () {
|
||
|
|
return currentLevel;
|
||
|
|
};
|
||
|
|
|
||
|
|
self.setLevel = function (level, persist) {
|
||
|
|
if (typeof level === "string" && self.levels[level.toUpperCase()] !== undefined) {
|
||
|
|
level = self.levels[level.toUpperCase()];
|
||
|
|
}
|
||
|
|
if (typeof level === "number" && level >= 0 && level <= self.levels.SILENT) {
|
||
|
|
currentLevel = level;
|
||
|
|
if (persist !== false) { // defaults to true
|
||
|
|
persistLevelIfPossible(level);
|
||
|
|
}
|
||
|
|
replaceLoggingMethods.call(self, level, name);
|
||
|
|
if (typeof console === undefinedType && level < self.levels.SILENT) {
|
||
|
|
return "No console available for logging";
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
throw "log.setLevel() called with invalid level: " + level;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
self.setDefaultLevel = function (level) {
|
||
|
|
defaultLevel = level;
|
||
|
|
if (!getPersistedLevel()) {
|
||
|
|
self.setLevel(level, false);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
self.resetLevel = function () {
|
||
|
|
self.setLevel(defaultLevel, false);
|
||
|
|
clearPersistedLevel();
|
||
|
|
};
|
||
|
|
|
||
|
|
self.enableAll = function(persist) {
|
||
|
|
self.setLevel(self.levels.TRACE, persist);
|
||
|
|
};
|
||
|
|
|
||
|
|
self.disableAll = function(persist) {
|
||
|
|
self.setLevel(self.levels.SILENT, persist);
|
||
|
|
};
|
||
|
|
|
||
|
|
// Initialize with the right level
|
||
|
|
var initialLevel = getPersistedLevel();
|
||
|
|
if (initialLevel == null) {
|
||
|
|
initialLevel = defaultLevel;
|
||
|
|
}
|
||
|
|
self.setLevel(initialLevel, false);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
*
|
||
|
|
* Top-level API
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
var defaultLogger = new Logger();
|
||
|
|
|
||
|
|
var _loggersByName = {};
|
||
|
|
defaultLogger.getLogger = function getLogger(name) {
|
||
|
|
if ((typeof name !== "symbol" && typeof name !== "string") || name === "") {
|
||
|
|
throw new TypeError("You must supply a name when creating a logger.");
|
||
|
|
}
|
||
|
|
|
||
|
|
var logger = _loggersByName[name];
|
||
|
|
if (!logger) {
|
||
|
|
logger = _loggersByName[name] = new Logger(
|
||
|
|
name, defaultLogger.getLevel(), defaultLogger.methodFactory);
|
||
|
|
}
|
||
|
|
return logger;
|
||
|
|
};
|
||
|
|
|
||
|
|
// Grab the current global log variable in case of overwrite
|
||
|
|
var _log = (typeof window !== undefinedType) ? window.log : undefined;
|
||
|
|
defaultLogger.noConflict = function() {
|
||
|
|
if (typeof window !== undefinedType &&
|
||
|
|
window.log === defaultLogger) {
|
||
|
|
window.log = _log;
|
||
|
|
}
|
||
|
|
|
||
|
|
return defaultLogger;
|
||
|
|
};
|
||
|
|
|
||
|
|
defaultLogger.getLoggers = function getLoggers() {
|
||
|
|
return _loggersByName;
|
||
|
|
};
|
||
|
|
|
||
|
|
// ES6 default export, for compatibility
|
||
|
|
defaultLogger['default'] = defaultLogger;
|
||
|
|
|
||
|
|
return defaultLogger;
|
||
|
|
}));
|