1 | /*! loglevel - v1.8.0 - https://github.com/pimterry/loglevel - (c) 2021 Tim Perry - licensed MIT */
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2 | (function (root, definition) {
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3 | "use strict";
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4 | if (typeof define === 'function' && define.amd) {
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5 | define(definition);
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6 | } else if (typeof module === 'object' && module.exports) {
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7 | module.exports = definition();
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8 | } else {
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9 | root.log = definition();
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10 | }
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11 | }(this, function () {
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12 | "use strict";
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13 |
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14 | // Slightly dubious tricks to cut down minimized file size
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15 | var noop = function() {};
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16 | var undefinedType = "undefined";
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17 | var isIE = (typeof window !== undefinedType) && (typeof window.navigator !== undefinedType) && (
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18 | /Trident\/|MSIE /.test(window.navigator.userAgent)
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19 | );
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20 |
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21 | var logMethods = [
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22 | "trace",
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23 | "debug",
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24 | "info",
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25 | "warn",
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26 | "error"
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27 | ];
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28 |
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29 | // Cross-browser bind equivalent that works at least back to IE6
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30 | function bindMethod(obj, methodName) {
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31 | var method = obj[methodName];
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32 | if (typeof method.bind === 'function') {
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33 | return method.bind(obj);
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34 | } else {
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35 | try {
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36 | return Function.prototype.bind.call(method, obj);
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37 | } catch (e) {
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38 | // Missing bind shim or IE8 + Modernizr, fallback to wrapping
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39 | return function() {
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40 | return Function.prototype.apply.apply(method, [obj, arguments]);
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41 | };
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42 | }
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43 | }
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44 | }
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45 |
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46 | // Trace() doesn't print the message in IE, so for that case we need to wrap it
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47 | function traceForIE() {
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48 | if (console.log) {
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49 | if (console.log.apply) {
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50 | console.log.apply(console, arguments);
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51 | } else {
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52 | // In old IE, native console methods themselves don't have apply().
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53 | Function.prototype.apply.apply(console.log, [console, arguments]);
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54 | }
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55 | }
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56 | if (console.trace) console.trace();
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57 | }
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58 |
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59 | // Build the best logging method possible for this env
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60 | // Wherever possible we want to bind, not wrap, to preserve stack traces
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61 | function realMethod(methodName) {
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62 | if (methodName === 'debug') {
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63 | methodName = 'log';
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64 | }
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65 |
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66 | if (typeof console === undefinedType) {
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67 | return false; // No method possible, for now - fixed later by enableLoggingWhenConsoleArrives
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68 | } else if (methodName === 'trace' && isIE) {
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69 | return traceForIE;
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70 | } else if (console[methodName] !== undefined) {
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71 | return bindMethod(console, methodName);
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72 | } else if (console.log !== undefined) {
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73 | return bindMethod(console, 'log');
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74 | } else {
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75 | return noop;
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76 | }
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77 | }
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78 |
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79 | // These private functions always need `this` to be set properly
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80 |
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81 | function replaceLoggingMethods(level, loggerName) {
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82 | /*jshint validthis:true */
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83 | for (var i = 0; i < logMethods.length; i++) {
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84 | var methodName = logMethods[i];
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85 | this[methodName] = (i < level) ?
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86 | noop :
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87 | this.methodFactory(methodName, level, loggerName);
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88 | }
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89 |
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90 | // Define log.log as an alias for log.debug
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91 | this.log = this.debug;
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92 | }
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93 |
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94 | // In old IE versions, the console isn't present until you first open it.
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95 | // We build realMethod() replacements here that regenerate logging methods
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96 | function enableLoggingWhenConsoleArrives(methodName, level, loggerName) {
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97 | return function () {
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98 | if (typeof console !== undefinedType) {
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99 | replaceLoggingMethods.call(this, level, loggerName);
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100 | this[methodName].apply(this, arguments);
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101 | }
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102 | };
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103 | }
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104 |
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105 | // By default, we use closely bound real methods wherever possible, and
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106 | // otherwise we wait for a console to appear, and then try again.
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107 | function defaultMethodFactory(methodName, level, loggerName) {
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108 | /*jshint validthis:true */
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109 | return realMethod(methodName) ||
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110 | enableLoggingWhenConsoleArrives.apply(this, arguments);
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111 | }
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112 |
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113 | function Logger(name, defaultLevel, factory) {
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114 | var self = this;
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115 | var currentLevel;
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116 | defaultLevel = defaultLevel == null ? "WARN" : defaultLevel;
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117 |
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118 | var storageKey = "loglevel";
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119 | if (typeof name === "string") {
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120 | storageKey += ":" + name;
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121 | } else if (typeof name === "symbol") {
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122 | storageKey = undefined;
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123 | }
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124 |
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125 | function persistLevelIfPossible(levelNum) {
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126 | var levelName = (logMethods[levelNum] || 'silent').toUpperCase();
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127 |
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128 | if (typeof window === undefinedType || !storageKey) return;
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129 |
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130 | // Use localStorage if available
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131 | try {
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132 | window.localStorage[storageKey] = levelName;
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133 | return;
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134 | } catch (ignore) {}
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135 |
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136 | // Use session cookie as fallback
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137 | try {
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138 | window.document.cookie =
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139 | encodeURIComponent(storageKey) + "=" + levelName + ";";
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140 | } catch (ignore) {}
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141 | }
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142 |
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143 | function getPersistedLevel() {
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144 | var storedLevel;
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145 |
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146 | if (typeof window === undefinedType || !storageKey) return;
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147 |
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148 | try {
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149 | storedLevel = window.localStorage[storageKey];
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150 | } catch (ignore) {}
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151 |
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152 | // Fallback to cookies if local storage gives us nothing
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153 | if (typeof storedLevel === undefinedType) {
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154 | try {
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155 | var cookie = window.document.cookie;
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156 | var location = cookie.indexOf(
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157 | encodeURIComponent(storageKey) + "=");
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158 | if (location !== -1) {
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159 | storedLevel = /^([^;]+)/.exec(cookie.slice(location))[1];
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160 | }
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161 | } catch (ignore) {}
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162 | }
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163 |
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164 | // If the stored level is not valid, treat it as if nothing was stored.
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165 | if (self.levels[storedLevel] === undefined) {
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166 | storedLevel = undefined;
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167 | }
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168 |
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169 | return storedLevel;
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170 | }
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171 |
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172 | function clearPersistedLevel() {
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173 | if (typeof window === undefinedType || !storageKey) return;
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174 |
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175 | // Use localStorage if available
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176 | try {
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177 | window.localStorage.removeItem(storageKey);
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178 | return;
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179 | } catch (ignore) {}
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180 |
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181 | // Use session cookie as fallback
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182 | try {
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183 | window.document.cookie =
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184 | encodeURIComponent(storageKey) + "=; expires=Thu, 01 Jan 1970 00:00:00 UTC";
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185 | } catch (ignore) {}
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186 | }
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187 |
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188 | /*
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189 | *
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190 | * Public logger API - see https://github.com/pimterry/loglevel for details
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191 | *
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192 | */
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193 |
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194 | self.name = name;
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195 |
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196 | self.levels = { "TRACE": 0, "DEBUG": 1, "INFO": 2, "WARN": 3,
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197 | "ERROR": 4, "SILENT": 5};
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198 |
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199 | self.methodFactory = factory || defaultMethodFactory;
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200 |
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201 | self.getLevel = function () {
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202 | return currentLevel;
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203 | };
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204 |
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205 | self.setLevel = function (level, persist) {
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206 | if (typeof level === "string" && self.levels[level.toUpperCase()] !== undefined) {
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207 | level = self.levels[level.toUpperCase()];
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208 | }
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209 | if (typeof level === "number" && level >= 0 && level <= self.levels.SILENT) {
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210 | currentLevel = level;
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211 | if (persist !== false) { // defaults to true
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212 | persistLevelIfPossible(level);
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213 | }
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214 | replaceLoggingMethods.call(self, level, name);
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215 | if (typeof console === undefinedType && level < self.levels.SILENT) {
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216 | return "No console available for logging";
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217 | }
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218 | } else {
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219 | throw "log.setLevel() called with invalid level: " + level;
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220 | }
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221 | };
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222 |
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223 | self.setDefaultLevel = function (level) {
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224 | defaultLevel = level;
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225 | if (!getPersistedLevel()) {
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226 | self.setLevel(level, false);
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227 | }
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228 | };
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229 |
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230 | self.resetLevel = function () {
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231 | self.setLevel(defaultLevel, false);
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232 | clearPersistedLevel();
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233 | };
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234 |
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235 | self.enableAll = function(persist) {
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236 | self.setLevel(self.levels.TRACE, persist);
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237 | };
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238 |
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239 | self.disableAll = function(persist) {
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240 | self.setLevel(self.levels.SILENT, persist);
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241 | };
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242 |
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243 | // Initialize with the right level
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244 | var initialLevel = getPersistedLevel();
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245 | if (initialLevel == null) {
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246 | initialLevel = defaultLevel;
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247 | }
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248 | self.setLevel(initialLevel, false);
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249 | }
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250 |
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251 | /*
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252 | *
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253 | * Top-level API
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254 | *
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255 | */
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256 |
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257 | var defaultLogger = new Logger();
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258 |
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259 | var _loggersByName = {};
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260 | defaultLogger.getLogger = function getLogger(name) {
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261 | if ((typeof name !== "symbol" && typeof name !== "string") || name === "") {
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262 | throw new TypeError("You must supply a name when creating a logger.");
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263 | }
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264 |
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265 | var logger = _loggersByName[name];
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266 | if (!logger) {
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267 | logger = _loggersByName[name] = new Logger(
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268 | name, defaultLogger.getLevel(), defaultLogger.methodFactory);
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269 | }
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270 | return logger;
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271 | };
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272 |
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273 | // Grab the current global log variable in case of overwrite
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274 | var _log = (typeof window !== undefinedType) ? window.log : undefined;
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275 | defaultLogger.noConflict = function() {
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276 | if (typeof window !== undefinedType &&
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277 | window.log === defaultLogger) {
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278 | window.log = _log;
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279 | }
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280 |
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281 | return defaultLogger;
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282 | };
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283 |
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284 | defaultLogger.getLoggers = function getLoggers() {
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285 | return _loggersByName;
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286 | };
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287 |
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288 | // ES6 default export, for compatibility
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289 | defaultLogger['default'] = defaultLogger;
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290 |
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291 | return defaultLogger;
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292 | }));
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