1 |
|
2 | (function (root, definition) {
|
3 | "use strict";
|
4 | if (typeof define === 'function' && define.amd) {
|
5 | define(definition);
|
6 | } else if (typeof module === 'object' && module.exports) {
|
7 | module.exports = definition();
|
8 | } else {
|
9 | root.log = definition();
|
10 | }
|
11 | }(this, function () {
|
12 | "use strict";
|
13 | var noop = function() {};
|
14 | var undefinedType = "undefined";
|
15 |
|
16 | function realMethod(methodName) {
|
17 | if (typeof console === undefinedType) {
|
18 | return false;
|
19 | } else if (console[methodName] !== undefined) {
|
20 | return bindMethod(console, methodName);
|
21 | } else if (console.log !== undefined) {
|
22 | return bindMethod(console, 'log');
|
23 | } else {
|
24 | return noop;
|
25 | }
|
26 | }
|
27 |
|
28 | function bindMethod(obj, methodName) {
|
29 | var method = obj[methodName];
|
30 | if (typeof method.bind === 'function') {
|
31 | return method.bind(obj);
|
32 | } else {
|
33 | try {
|
34 | return Function.prototype.bind.call(method, obj);
|
35 | } catch (e) {
|
36 |
|
37 | return function() {
|
38 | return Function.prototype.apply.apply(method, [obj, arguments]);
|
39 | };
|
40 | }
|
41 | }
|
42 | }
|
43 |
|
44 |
|
45 |
|
46 | function enableLoggingWhenConsoleArrives(methodName, level, loggerName) {
|
47 | return function () {
|
48 | if (typeof console !== undefinedType) {
|
49 | replaceLoggingMethods.call(this, level, loggerName);
|
50 | this[methodName].apply(this, arguments);
|
51 | }
|
52 | };
|
53 | }
|
54 |
|
55 | function replaceLoggingMethods(level, loggerName) {
|
56 |
|
57 | for (var i = 0; i < logMethods.length; i++) {
|
58 | var methodName = logMethods[i];
|
59 | this[methodName] = (i < level) ?
|
60 | noop :
|
61 | this.methodFactory(methodName, level, loggerName);
|
62 | }
|
63 | }
|
64 |
|
65 | function defaultMethodFactory(methodName, level, loggerName) {
|
66 |
|
67 | return realMethod(methodName) ||
|
68 | enableLoggingWhenConsoleArrives.apply(this, arguments);
|
69 | }
|
70 |
|
71 | var logMethods = [
|
72 | "trace",
|
73 | "debug",
|
74 | "info",
|
75 | "warn",
|
76 | "error"
|
77 | ];
|
78 |
|
79 | function Logger(name, defaultLevel, factory) {
|
80 | var self = this;
|
81 | var currentLevel;
|
82 | var storageKey = "loglevel";
|
83 | if (name) {
|
84 | storageKey += ":" + name;
|
85 | }
|
86 |
|
87 | function persistLevelIfPossible(levelNum) {
|
88 | var levelName = (logMethods[levelNum] || 'silent').toUpperCase();
|
89 |
|
90 |
|
91 | try {
|
92 | window.localStorage[storageKey] = levelName;
|
93 | return;
|
94 | } catch (ignore) {}
|
95 |
|
96 |
|
97 | try {
|
98 | window.document.cookie =
|
99 | encodeURIComponent(storageKey) + "=" + levelName + ";";
|
100 | } catch (ignore) {}
|
101 | }
|
102 |
|
103 | function getPersistedLevel() {
|
104 | var storedLevel;
|
105 |
|
106 | try {
|
107 | storedLevel = window.localStorage[storageKey];
|
108 | } catch (ignore) {}
|
109 |
|
110 | if (typeof storedLevel === undefinedType) {
|
111 | try {
|
112 | var cookie = window.document.cookie;
|
113 | var location = cookie.indexOf(
|
114 | encodeURIComponent(storageKey) + "=");
|
115 | if (location) {
|
116 | storedLevel = /^([^;]+)/.exec(cookie.slice(location))[1];
|
117 | }
|
118 | } catch (ignore) {}
|
119 | }
|
120 |
|
121 |
|
122 | if (self.levels[storedLevel] === undefined) {
|
123 | storedLevel = undefined;
|
124 | }
|
125 |
|
126 | return storedLevel;
|
127 | }
|
128 |
|
129 | |
130 |
|
131 |
|
132 |
|
133 |
|
134 |
|
135 | self.levels = { "TRACE": 0, "DEBUG": 1, "INFO": 2, "WARN": 3,
|
136 | "ERROR": 4, "SILENT": 5};
|
137 |
|
138 | self.methodFactory = factory || defaultMethodFactory;
|
139 |
|
140 | self.getLevel = function () {
|
141 | return currentLevel;
|
142 | };
|
143 |
|
144 | self.setLevel = function (level, persist) {
|
145 | if (typeof level === "string" && self.levels[level.toUpperCase()] !== undefined) {
|
146 | level = self.levels[level.toUpperCase()];
|
147 | }
|
148 | if (typeof level === "number" && level >= 0 && level <= self.levels.SILENT) {
|
149 | currentLevel = level;
|
150 | if (persist !== false) {
|
151 | persistLevelIfPossible(level);
|
152 | }
|
153 | replaceLoggingMethods.call(self, level, name);
|
154 | if (typeof console === undefinedType && level < self.levels.SILENT) {
|
155 | return "No console available for logging";
|
156 | }
|
157 | } else {
|
158 | throw "log.setLevel() called with invalid level: " + level;
|
159 | }
|
160 | };
|
161 |
|
162 | self.setDefaultLevel = function (level) {
|
163 | if (!getPersistedLevel()) {
|
164 | self.setLevel(level, false);
|
165 | }
|
166 | };
|
167 |
|
168 | self.enableAll = function(persist) {
|
169 | self.setLevel(self.levels.TRACE, persist);
|
170 | };
|
171 |
|
172 | self.disableAll = function(persist) {
|
173 | self.setLevel(self.levels.SILENT, persist);
|
174 | };
|
175 |
|
176 |
|
177 | var initialLevel = getPersistedLevel();
|
178 | if (initialLevel == null) {
|
179 | initialLevel = defaultLevel == null ? "WARN" : defaultLevel;
|
180 | }
|
181 | self.setLevel(initialLevel, false);
|
182 | }
|
183 |
|
184 | |
185 |
|
186 |
|
187 |
|
188 |
|
189 |
|
190 | var defaultLogger = new Logger();
|
191 |
|
192 | var _loggersByName = {};
|
193 | defaultLogger.getLogger = function getLogger(name) {
|
194 | if (typeof name !== "string" || name === "") {
|
195 | throw new TypeError("You must supply a name when creating a logger.");
|
196 | }
|
197 |
|
198 | var logger = _loggersByName[name];
|
199 | if (!logger) {
|
200 | logger = _loggersByName[name] = new Logger(
|
201 | name, defaultLogger.getLevel(), defaultLogger.methodFactory);
|
202 | }
|
203 | return logger;
|
204 | };
|
205 |
|
206 |
|
207 | var _log = (typeof window !== undefinedType) ? window.log : undefined;
|
208 | defaultLogger.noConflict = function() {
|
209 | if (typeof window !== undefinedType &&
|
210 | window.log === defaultLogger) {
|
211 | window.log = _log;
|
212 | }
|
213 |
|
214 | return defaultLogger;
|
215 | };
|
216 |
|
217 | return defaultLogger;
|
218 | }));
|