1 files changed, 229 insertions, 0 deletions
diff --git a/node_modules/mongodb-core/lib/connection/logger.js b/node_modules/mongodb-core/lib/connection/logger.js
new file mode 100644
index 0000000..cba8954
--- /dev/null
+++ b/node_modules/mongodb-core/lib/connection/logger.js
@@ -0,0 +1,229 @@
+"use strict";
+
+var f = require('util').format
+  , MongoError = require('../error');
+
+// Filters for classes
+var classFilters = {};
+var filteredClasses = {};
+var level = null;
+// Save the process id
+var pid = process.pid;
+// current logger
+var currentLogger = null;
+
+/**
+ * Creates a new Logger instance
+ * @class
+ * @param {string} className The Class name associated with the logging instance
+ * @param {object} [options=null] Optional settings.
+ * @param {Function} [options.logger=null] Custom logger function;
+ * @param {string} [options.loggerLevel=error] Override default global log level.
+ * @return {Logger} a Logger instance.
+ */
+var Logger = function(className, options) {
+  if(!(this instanceof Logger)) return new Logger(className, options);
+  options = options || {};
+
+  // Current reference
+  var self = this;
+  this.className = className;
+
+  // Current logger
+  if(options.logger) {
+    currentLogger = options.logger;
+  } else if(currentLogger == null) {
+    currentLogger = console.log;
+  }
+
+  // Set level of logging, default is error
+  if(options.loggerLevel) {
+    level = options.loggerLevel || 'error';
+  }
+
+  // Add all class names
+  if(filteredClasses[this.className] == null) classFilters[this.className] =  true;
+}
+
+/**
+ * Log a message at the debug level
+ * @method
+ * @param {string} message The message to log
+ * @param {object} object additional meta data to log
+ * @return {null}
+ */
+Logger.prototype.debug = function(message, object) {
+  if(this.isDebug()
+    && ((Object.keys(filteredClasses).length > 0 && filteredClasses[this.className])
+      || (Object.keys(filteredClasses).length == 0 && classFilters[this.className]))) {
+    var dateTime = new Date().getTime();
+    var msg = f("[%s-%s:%s] %s %s", 'DEBUG', this.className, pid, dateTime, message);
+    var state = {
+      type: 'debug', message: message, className: this.className, pid: pid, date: dateTime
+    };
+    if(object) state.meta = object;
+    currentLogger(msg, state);
+  }
+}
+
+/**
+ * Log a message at the warn level
+ * @method
+ * @param {string} message The message to log
+ * @param {object} object additional meta data to log
+ * @return {null}
+ */
+Logger.prototype.warn = function(message, object) {
+  if(this.isWarn()
+    && ((Object.keys(filteredClasses).length > 0 && filteredClasses[this.className])
+      || (Object.keys(filteredClasses).length == 0 && classFilters[this.className]))) {
+    var dateTime = new Date().getTime();
+    var msg = f("[%s-%s:%s] %s %s", 'WARN', this.className, pid, dateTime, message);
+    var state = {
+      type: 'warn', message: message, className: this.className, pid: pid, date: dateTime
+    };
+    if(object) state.meta = object;
+    currentLogger(msg, state);
+  }
+},
+
+/**
+ * Log a message at the info level
+ * @method
+ * @param {string} message The message to log
+ * @param {object} object additional meta data to log
+ * @return {null}
+ */
+Logger.prototype.info = function(message, object) {
+  if(this.isInfo()
+    && ((Object.keys(filteredClasses).length > 0 && filteredClasses[this.className])
+      || (Object.keys(filteredClasses).length == 0 && classFilters[this.className]))) {
+    var dateTime = new Date().getTime();
+    var msg = f("[%s-%s:%s] %s %s", 'INFO', this.className, pid, dateTime, message);
+    var state = {
+      type: 'info', message: message, className: this.className, pid: pid, date: dateTime
+    };
+    if(object) state.meta = object;
+    currentLogger(msg, state);
+  }
+},
+
+/**
+ * Log a message at the error level
+ * @method
+ * @param {string} message The message to log
+ * @param {object} object additional meta data to log
+ * @return {null}
+ */
+Logger.prototype.error = function(message, object) {
+  if(this.isError()
+    && ((Object.keys(filteredClasses).length > 0 && filteredClasses[this.className])
+      || (Object.keys(filteredClasses).length == 0 && classFilters[this.className]))) {
+    var dateTime = new Date().getTime();
+    var msg = f("[%s-%s:%s] %s %s", 'ERROR', this.className, pid, dateTime, message);
+    var state = {
+      type: 'error', message: message, className: this.className, pid: pid, date: dateTime
+    };
+    if(object) state.meta = object;
+    currentLogger(msg, state);
+  }
+},
+
+/**
+ * Is the logger set at info level
+ * @method
+ * @return {boolean}
+ */
+Logger.prototype.isInfo = function() {
+  return level == 'info' || level == 'debug';
+},
+
+/**
+ * Is the logger set at error level
+ * @method
+ * @return {boolean}
+ */
+Logger.prototype.isError = function() {
+  return level == 'error' || level == 'info' || level == 'debug';
+},
+
+/**
+ * Is the logger set at error level
+ * @method
+ * @return {boolean}
+ */
+Logger.prototype.isWarn = function() {
+  return level == 'error' || level == 'warn' || level == 'info' || level == 'debug';
+},
+
+/**
+ * Is the logger set at debug level
+ * @method
+ * @return {boolean}
+ */
+Logger.prototype.isDebug = function() {
+  return level == 'debug';
+}
+
+/**
+ * Resets the logger to default settings, error and no filtered classes
+ * @method
+ * @return {null}
+ */
+Logger.reset = function() {
+  level = 'error';
+  filteredClasses = {};
+}
+
+/**
+ * Get the current logger function
+ * @method
+ * @return {function}
+ */
+Logger.currentLogger = function() {
+  return currentLogger;
+}
+
+/**
+ * Set the current logger function
+ * @method
+ * @param {function} logger Logger function.
+ * @return {null}
+ */
+Logger.setCurrentLogger = function(logger) {
+  if(typeof logger != 'function') throw new MongoError("current logger must be a function");
+  currentLogger = logger;
+}
+
+/**
+ * Set what classes to log.
+ * @method
+ * @param {string} type The type of filter (currently only class)
+ * @param {string[]} values The filters to apply
+ * @return {null}
+ */
+Logger.filter = function(type, values) {
+  if(type == 'class' && Array.isArray(values)) {
+    filteredClasses = {};
+
+    values.forEach(function(x) {
+      filteredClasses[x] = true;
+    });
+  }
+}
+
+/**
+ * Set the current log level
+ * @method
+ * @param {string} level Set current log level (debug, info, error)
+ * @return {null}
+ */
+Logger.setLevel = function(_level) {
+  if(_level != 'info' && _level != 'error' && _level != 'debug' && _level != 'warn') {
+    throw new Error(f("%s is an illegal logging level", _level));
+  }
+
+  level = _level;
+}
+
+module.exports = Logger;