1 | "use strict";
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2 |
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3 | var f = require('util').format;
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4 |
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5 |
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6 | var classFilters = {};
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7 | var filteredClasses = {};
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8 | var level = null;
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9 |
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10 | var pid = process.pid;
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11 |
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12 | var currentLogger = null;
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13 |
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14 |
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15 |
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16 |
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17 |
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18 |
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19 |
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20 |
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21 |
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22 |
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23 | var Logger = function(className, options) {
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24 | if(!(this instanceof Logger)) return new Logger(className, options);
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25 | options = options || {};
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26 |
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27 |
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28 | var self = this;
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29 | this.className = className;
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30 |
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31 |
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32 | if(currentLogger == null && options.logger) {
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33 | currentLogger = options.logger;
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34 | } else if(currentLogger == null) {
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35 | currentLogger = console.log;
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36 | }
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37 |
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38 |
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39 | if(level == null) {
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40 | level = options.loggerLevel || 'error';
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41 | }
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42 |
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43 |
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44 | if(filteredClasses[this.className] == null) classFilters[this.className] = true;
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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 |
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51 |
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52 |
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53 |
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54 | Logger.prototype.debug = function(message, object) {
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55 | if(this.isDebug()
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56 | && ((Object.keys(filteredClasses).length > 0 && filteredClasses[this.className])
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57 | || (Object.keys(filteredClasses).length == 0 && classFilters[this.className]))) {
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58 | var dateTime = new Date().getTime();
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59 | var msg = f("[%s-%s:%s] %s %s", 'DEBUG', this.className, pid, dateTime, message);
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60 | var state = {
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61 | type: 'debug', message: message, className: this.className, pid: pid, date: dateTime
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62 | };
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63 | if(object) state.meta = object;
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64 | currentLogger(msg, state);
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65 | }
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66 | }
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67 |
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68 |
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69 |
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70 |
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71 |
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72 |
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73 |
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74 |
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75 | Logger.prototype.info = function(message, object) {
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76 | if(this.isInfo()
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77 | && ((Object.keys(filteredClasses).length > 0 && filteredClasses[this.className])
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78 | || (Object.keys(filteredClasses).length == 0 && classFilters[this.className]))) {
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79 | var dateTime = new Date().getTime();
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80 | var msg = f("[%s-%s:%s] %s %s", 'INFO', this.className, pid, dateTime, message);
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81 | var state = {
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82 | type: 'info', message: message, className: this.className, pid: pid, date: dateTime
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83 | };
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84 | if(object) state.meta = object;
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85 | currentLogger(msg, state);
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86 | }
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87 | },
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88 |
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89 |
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90 |
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91 |
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92 |
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93 |
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94 |
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95 |
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96 | Logger.prototype.error = function(message, object) {
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97 | if(this.isError()
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98 | && ((Object.keys(filteredClasses).length > 0 && filteredClasses[this.className])
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99 | || (Object.keys(filteredClasses).length == 0 && classFilters[this.className]))) {
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100 | var dateTime = new Date().getTime();
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101 | var msg = f("[%s-%s:%s] %s %s", 'ERROR', this.className, pid, dateTime, message);
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102 | var state = {
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103 | type: 'error', message: message, className: this.className, pid: pid, date: dateTime
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104 | };
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105 | if(object) state.meta = object;
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106 | currentLogger(msg, state);
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107 | }
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108 | },
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109 |
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110 |
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111 |
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112 |
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113 |
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114 |
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115 | Logger.prototype.isInfo = function() {
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116 | return level == 'info' || level == 'debug';
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117 | },
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118 |
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119 |
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120 |
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121 |
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122 |
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123 |
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124 | Logger.prototype.isError = function() {
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125 | return level == 'error' || level == 'info' || level == 'debug';
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126 | },
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127 |
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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 | Logger.prototype.isDebug = function() {
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134 | return level == 'debug';
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135 | }
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136 |
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137 |
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138 |
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139 |
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140 |
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141 |
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142 | Logger.reset = function() {
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143 | level = 'error';
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144 | filteredClasses = {};
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145 | }
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146 |
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147 |
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148 |
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149 |
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150 |
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151 |
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152 | Logger.currentLogger = function() {
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153 | return currentLogger;
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154 | }
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155 |
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156 |
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157 |
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158 |
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159 |
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160 |
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161 |
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162 | Logger.setCurrentLogger = function(logger) {
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163 | if(typeof logger != 'function') throw new Error("current logger must be a function");
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164 | currentLogger = logger;
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165 | }
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166 |
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167 |
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168 |
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169 |
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170 |
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171 |
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172 |
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173 |
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174 | Logger.filter = function(type, values) {
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175 | if(type == 'class' && Array.isArray(values)) {
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176 | filteredClasses = {};
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177 |
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178 | values.forEach(function(x) {
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179 | filteredClasses[x] = true;
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180 | });
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181 | }
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182 | }
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183 |
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184 |
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185 |
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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 | Logger.setLevel = function(_level) {
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191 | if(_level != 'info' && _level != 'error' && _level != 'debug') throw new Error(f("%s is an illegal logging level", _level));
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192 | level = _level;
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193 | }
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194 |
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195 | module.exports = Logger; |
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