1 |
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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 |
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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 | var _loggersByName = {};
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30 | var defaultLogger = null;
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31 |
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32 |
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33 | function bindMethod(obj, methodName) {
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34 | var method = obj[methodName];
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35 | if (typeof method.bind === 'function') {
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36 | return method.bind(obj);
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37 | } else {
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38 | try {
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39 | return Function.prototype.bind.call(method, obj);
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40 | } catch (e) {
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41 |
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42 | return function() {
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43 | return Function.prototype.apply.apply(method, [obj, arguments]);
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44 | };
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45 | }
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46 | }
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47 | }
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48 |
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49 |
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50 | function traceForIE() {
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51 | if (console.log) {
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52 | if (console.log.apply) {
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53 | console.log.apply(console, arguments);
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54 | } else {
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55 |
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56 | Function.prototype.apply.apply(console.log, [console, arguments]);
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57 | }
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58 | }
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59 | if (console.trace) console.trace();
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60 | }
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61 |
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62 |
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63 |
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64 | function realMethod(methodName) {
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65 | if (methodName === 'debug') {
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66 | methodName = 'log';
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67 | }
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68 |
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69 | if (typeof console === undefinedType) {
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70 | return false;
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71 | } else if (methodName === 'trace' && isIE) {
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72 | return traceForIE;
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73 | } else if (console[methodName] !== undefined) {
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74 | return bindMethod(console, methodName);
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75 | } else if (console.log !== undefined) {
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76 | return bindMethod(console, 'log');
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77 | } else {
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78 | return noop;
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79 | }
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80 | }
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81 |
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82 |
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83 |
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84 | function replaceLoggingMethods() {
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85 |
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86 | var level = this.getLevel();
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87 |
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88 |
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89 | for (var i = 0; i < logMethods.length; i++) {
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90 | var methodName = logMethods[i];
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91 | this[methodName] = (i < level) ?
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92 | noop :
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93 | this.methodFactory(methodName, level, this.name);
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94 | }
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95 |
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96 |
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97 | this.log = this.debug;
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98 |
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99 |
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100 | if (typeof console === undefinedType && level < this.levels.SILENT) {
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101 | return "No console available for logging";
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102 | }
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103 | }
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104 |
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105 |
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106 |
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107 | function enableLoggingWhenConsoleArrives(methodName) {
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108 | return function () {
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109 | if (typeof console !== undefinedType) {
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110 | replaceLoggingMethods.call(this);
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111 | this[methodName].apply(this, arguments);
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112 | }
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113 | };
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114 | }
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115 |
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116 |
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117 |
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118 | function defaultMethodFactory(methodName, _level, _loggerName) {
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119 |
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120 | return realMethod(methodName) ||
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121 | enableLoggingWhenConsoleArrives.apply(this, arguments);
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122 | }
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123 |
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124 | function Logger(name, factory) {
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125 |
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126 | var self = this;
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127 | |
128 |
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129 |
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130 |
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131 |
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132 |
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133 |
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134 |
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135 | var inheritedLevel;
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136 | |
137 |
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138 |
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139 |
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140 |
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141 | var defaultLevel;
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142 | |
143 |
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144 |
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145 |
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146 |
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147 | var userLevel;
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148 |
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149 | var storageKey = "loglevel";
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150 | if (typeof name === "string") {
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151 | storageKey += ":" + name;
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152 | } else if (typeof name === "symbol") {
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153 | storageKey = undefined;
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154 | }
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155 |
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156 | function persistLevelIfPossible(levelNum) {
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157 | var levelName = (logMethods[levelNum] || 'silent').toUpperCase();
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158 |
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159 | if (typeof window === undefinedType || !storageKey) return;
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160 |
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161 |
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162 | try {
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163 | window.localStorage[storageKey] = levelName;
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164 | return;
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165 | } catch (ignore) {}
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166 |
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167 |
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168 | try {
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169 | window.document.cookie =
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170 | encodeURIComponent(storageKey) + "=" + levelName + ";";
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171 | } catch (ignore) {}
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172 | }
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173 |
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174 | function getPersistedLevel() {
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175 | var storedLevel;
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176 |
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177 | if (typeof window === undefinedType || !storageKey) return;
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178 |
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179 | try {
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180 | storedLevel = window.localStorage[storageKey];
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181 | } catch (ignore) {}
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182 |
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183 |
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184 | if (typeof storedLevel === undefinedType) {
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185 | try {
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186 | var cookie = window.document.cookie;
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187 | var cookieName = encodeURIComponent(storageKey);
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188 | var location = cookie.indexOf(cookieName + "=");
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189 | if (location !== -1) {
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190 | storedLevel = /^([^;]+)/.exec(
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191 | cookie.slice(location + cookieName.length + 1)
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192 | )[1];
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193 | }
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194 | } catch (ignore) {}
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195 | }
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196 |
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197 |
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198 | if (self.levels[storedLevel] === undefined) {
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199 | storedLevel = undefined;
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200 | }
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201 |
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202 | return storedLevel;
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203 | }
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204 |
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205 | function clearPersistedLevel() {
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206 | if (typeof window === undefinedType || !storageKey) return;
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207 |
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208 |
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209 | try {
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210 | window.localStorage.removeItem(storageKey);
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211 | } catch (ignore) {}
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212 |
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213 |
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214 | try {
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215 | window.document.cookie =
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216 | encodeURIComponent(storageKey) + "=; expires=Thu, 01 Jan 1970 00:00:00 UTC";
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217 | } catch (ignore) {}
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218 | }
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219 |
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220 | function normalizeLevel(input) {
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221 | var level = input;
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222 | if (typeof level === "string" && self.levels[level.toUpperCase()] !== undefined) {
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223 | level = self.levels[level.toUpperCase()];
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224 | }
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225 | if (typeof level === "number" && level >= 0 && level <= self.levels.SILENT) {
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226 | return level;
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227 | } else {
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228 | throw new TypeError("log.setLevel() called with invalid level: " + input);
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229 | }
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230 | }
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231 |
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232 | |
233 |
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234 |
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235 |
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236 |
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237 |
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238 | self.name = name;
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239 |
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240 | self.levels = { "TRACE": 0, "DEBUG": 1, "INFO": 2, "WARN": 3,
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241 | "ERROR": 4, "SILENT": 5};
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242 |
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243 | self.methodFactory = factory || defaultMethodFactory;
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244 |
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245 | self.getLevel = function () {
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246 | if (userLevel != null) {
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247 | return userLevel;
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248 | } else if (defaultLevel != null) {
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249 | return defaultLevel;
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250 | } else {
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251 | return inheritedLevel;
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252 | }
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253 | };
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254 |
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255 | self.setLevel = function (level, persist) {
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256 | userLevel = normalizeLevel(level);
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257 | if (persist !== false) {
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258 | persistLevelIfPossible(userLevel);
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259 | }
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260 |
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261 |
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262 | return replaceLoggingMethods.call(this);
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263 | };
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264 |
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265 | self.setDefaultLevel = function (level) {
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266 | defaultLevel = normalizeLevel(level);
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267 | if (!getPersistedLevel()) {
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268 | self.setLevel(level, false);
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269 | }
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270 | };
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271 |
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272 | self.resetLevel = function () {
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273 | userLevel = null;
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274 | clearPersistedLevel();
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275 | replaceLoggingMethods.call(this);
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276 | };
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277 |
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278 | self.enableAll = function(persist) {
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279 | self.setLevel(self.levels.TRACE, persist);
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280 | };
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281 |
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282 | self.disableAll = function(persist) {
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283 | self.setLevel(self.levels.SILENT, persist);
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284 | };
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285 |
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286 | self.rebuild = function () {
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287 | if (defaultLogger !== self) {
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288 | inheritedLevel = normalizeLevel(defaultLogger.getLevel());
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289 | }
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290 | replaceLoggingMethods.call(this);
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291 |
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292 | if (defaultLogger === self) {
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293 | for (var childName in _loggersByName) {
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294 | _loggersByName[childName].rebuild();
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295 | }
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296 | }
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297 | };
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298 |
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299 |
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300 | inheritedLevel = normalizeLevel(
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301 | defaultLogger ? defaultLogger.getLevel() : "WARN"
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302 | );
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303 | var initialLevel = getPersistedLevel();
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304 | if (initialLevel != null) {
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305 | userLevel = normalizeLevel(initialLevel);
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306 | }
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307 | replaceLoggingMethods.call(this);
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308 | }
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309 |
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310 | |
311 |
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312 |
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313 |
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314 |
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315 |
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316 | defaultLogger = new Logger();
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317 |
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318 | defaultLogger.getLogger = function getLogger(name) {
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319 | if ((typeof name !== "symbol" && typeof name !== "string") || name === "") {
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320 | throw new TypeError("You must supply a name when creating a logger.");
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321 | }
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322 |
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323 | var logger = _loggersByName[name];
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324 | if (!logger) {
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325 | logger = _loggersByName[name] = new Logger(
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326 | name,
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327 | defaultLogger.methodFactory
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328 | );
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329 | }
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330 | return logger;
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331 | };
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332 |
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333 |
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334 | var _log = (typeof window !== undefinedType) ? window.log : undefined;
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335 | defaultLogger.noConflict = function() {
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336 | if (typeof window !== undefinedType &&
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337 | window.log === defaultLogger) {
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338 | window.log = _log;
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339 | }
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340 |
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341 | return defaultLogger;
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342 | };
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343 |
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344 | defaultLogger.getLoggers = function getLoggers() {
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345 | return _loggersByName;
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346 | };
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347 |
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348 |
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349 | defaultLogger['default'] = defaultLogger;
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350 |
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351 | return defaultLogger;
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352 | }));
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