source: trip-planner-front/node_modules/loglevel/dist/loglevel.js@ 59329aa

Last change on this file since 59329aa was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

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1/*! loglevel - v1.7.1 - https://github.com/pimterry/loglevel - (c) 2020 Tim Perry - licensed MIT */
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
14 // Slightly dubious tricks to cut down minimized file size
15 var noop = function() {};
16 var undefinedType = "undefined";
17 var isIE = (typeof window !== undefinedType) && (typeof window.navigator !== undefinedType) && (
18 /Trident\/|MSIE /.test(window.navigator.userAgent)
19 );
20
21 var logMethods = [
22 "trace",
23 "debug",
24 "info",
25 "warn",
26 "error"
27 ];
28
29 // Cross-browser bind equivalent that works at least back to IE6
30 function bindMethod(obj, methodName) {
31 var method = obj[methodName];
32 if (typeof method.bind === 'function') {
33 return method.bind(obj);
34 } else {
35 try {
36 return Function.prototype.bind.call(method, obj);
37 } catch (e) {
38 // Missing bind shim or IE8 + Modernizr, fallback to wrapping
39 return function() {
40 return Function.prototype.apply.apply(method, [obj, arguments]);
41 };
42 }
43 }
44 }
45
46 // Trace() doesn't print the message in IE, so for that case we need to wrap it
47 function traceForIE() {
48 if (console.log) {
49 if (console.log.apply) {
50 console.log.apply(console, arguments);
51 } else {
52 // In old IE, native console methods themselves don't have apply().
53 Function.prototype.apply.apply(console.log, [console, arguments]);
54 }
55 }
56 if (console.trace) console.trace();
57 }
58
59 // Build the best logging method possible for this env
60 // Wherever possible we want to bind, not wrap, to preserve stack traces
61 function realMethod(methodName) {
62 if (methodName === 'debug') {
63 methodName = 'log';
64 }
65
66 if (typeof console === undefinedType) {
67 return false; // No method possible, for now - fixed later by enableLoggingWhenConsoleArrives
68 } else if (methodName === 'trace' && isIE) {
69 return traceForIE;
70 } else if (console[methodName] !== undefined) {
71 return bindMethod(console, methodName);
72 } else if (console.log !== undefined) {
73 return bindMethod(console, 'log');
74 } else {
75 return noop;
76 }
77 }
78
79 // These private functions always need `this` to be set properly
80
81 function replaceLoggingMethods(level, loggerName) {
82 /*jshint validthis:true */
83 for (var i = 0; i < logMethods.length; i++) {
84 var methodName = logMethods[i];
85 this[methodName] = (i < level) ?
86 noop :
87 this.methodFactory(methodName, level, loggerName);
88 }
89
90 // Define log.log as an alias for log.debug
91 this.log = this.debug;
92 }
93
94 // In old IE versions, the console isn't present until you first open it.
95 // We build realMethod() replacements here that regenerate logging methods
96 function enableLoggingWhenConsoleArrives(methodName, level, loggerName) {
97 return function () {
98 if (typeof console !== undefinedType) {
99 replaceLoggingMethods.call(this, level, loggerName);
100 this[methodName].apply(this, arguments);
101 }
102 };
103 }
104
105 // By default, we use closely bound real methods wherever possible, and
106 // otherwise we wait for a console to appear, and then try again.
107 function defaultMethodFactory(methodName, level, loggerName) {
108 /*jshint validthis:true */
109 return realMethod(methodName) ||
110 enableLoggingWhenConsoleArrives.apply(this, arguments);
111 }
112
113 function Logger(name, defaultLevel, factory) {
114 var self = this;
115 var currentLevel;
116
117 var storageKey = "loglevel";
118 if (typeof name === "string") {
119 storageKey += ":" + name;
120 } else if (typeof name === "symbol") {
121 storageKey = undefined;
122 }
123
124 function persistLevelIfPossible(levelNum) {
125 var levelName = (logMethods[levelNum] || 'silent').toUpperCase();
126
127 if (typeof window === undefinedType || !storageKey) return;
128
129 // Use localStorage if available
130 try {
131 window.localStorage[storageKey] = levelName;
132 return;
133 } catch (ignore) {}
134
135 // Use session cookie as fallback
136 try {
137 window.document.cookie =
138 encodeURIComponent(storageKey) + "=" + levelName + ";";
139 } catch (ignore) {}
140 }
141
142 function getPersistedLevel() {
143 var storedLevel;
144
145 if (typeof window === undefinedType || !storageKey) return;
146
147 try {
148 storedLevel = window.localStorage[storageKey];
149 } catch (ignore) {}
150
151 // Fallback to cookies if local storage gives us nothing
152 if (typeof storedLevel === undefinedType) {
153 try {
154 var cookie = window.document.cookie;
155 var location = cookie.indexOf(
156 encodeURIComponent(storageKey) + "=");
157 if (location !== -1) {
158 storedLevel = /^([^;]+)/.exec(cookie.slice(location))[1];
159 }
160 } catch (ignore) {}
161 }
162
163 // If the stored level is not valid, treat it as if nothing was stored.
164 if (self.levels[storedLevel] === undefined) {
165 storedLevel = undefined;
166 }
167
168 return storedLevel;
169 }
170
171 /*
172 *
173 * Public logger API - see https://github.com/pimterry/loglevel for details
174 *
175 */
176
177 self.name = name;
178
179 self.levels = { "TRACE": 0, "DEBUG": 1, "INFO": 2, "WARN": 3,
180 "ERROR": 4, "SILENT": 5};
181
182 self.methodFactory = factory || defaultMethodFactory;
183
184 self.getLevel = function () {
185 return currentLevel;
186 };
187
188 self.setLevel = function (level, persist) {
189 if (typeof level === "string" && self.levels[level.toUpperCase()] !== undefined) {
190 level = self.levels[level.toUpperCase()];
191 }
192 if (typeof level === "number" && level >= 0 && level <= self.levels.SILENT) {
193 currentLevel = level;
194 if (persist !== false) { // defaults to true
195 persistLevelIfPossible(level);
196 }
197 replaceLoggingMethods.call(self, level, name);
198 if (typeof console === undefinedType && level < self.levels.SILENT) {
199 return "No console available for logging";
200 }
201 } else {
202 throw "log.setLevel() called with invalid level: " + level;
203 }
204 };
205
206 self.setDefaultLevel = function (level) {
207 if (!getPersistedLevel()) {
208 self.setLevel(level, false);
209 }
210 };
211
212 self.enableAll = function(persist) {
213 self.setLevel(self.levels.TRACE, persist);
214 };
215
216 self.disableAll = function(persist) {
217 self.setLevel(self.levels.SILENT, persist);
218 };
219
220 // Initialize with the right level
221 var initialLevel = getPersistedLevel();
222 if (initialLevel == null) {
223 initialLevel = defaultLevel == null ? "WARN" : defaultLevel;
224 }
225 self.setLevel(initialLevel, false);
226 }
227
228 /*
229 *
230 * Top-level API
231 *
232 */
233
234 var defaultLogger = new Logger();
235
236 var _loggersByName = {};
237 defaultLogger.getLogger = function getLogger(name) {
238 if ((typeof name !== "symbol" && typeof name !== "string") || name === "") {
239 throw new TypeError("You must supply a name when creating a logger.");
240 }
241
242 var logger = _loggersByName[name];
243 if (!logger) {
244 logger = _loggersByName[name] = new Logger(
245 name, defaultLogger.getLevel(), defaultLogger.methodFactory);
246 }
247 return logger;
248 };
249
250 // Grab the current global log variable in case of overwrite
251 var _log = (typeof window !== undefinedType) ? window.log : undefined;
252 defaultLogger.noConflict = function() {
253 if (typeof window !== undefinedType &&
254 window.log === defaultLogger) {
255 window.log = _log;
256 }
257
258 return defaultLogger;
259 };
260
261 defaultLogger.getLoggers = function getLoggers() {
262 return _loggersByName;
263 };
264
265 // ES6 default export, for compatibility
266 defaultLogger['default'] = defaultLogger;
267
268 return defaultLogger;
269}));
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