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"use strict";
var levels = require('./levels')
, util = require('util')
, events = require('events')
, DEFAULT_CATEGORY = '[default]';
var logWritesEnabled = true;
/**
* Models a logging event.
* @constructor
* @param {String} categoryName name of category
* @param {Log4js.Level} level level of message
* @param {Array} data objects to log
* @param {Log4js.Logger} logger the associated logger
* @author Seth Chisamore
*/
function LoggingEvent (categoryName, level, data, logger) {
this.startTime = new Date();
this.categoryName = categoryName;
this.data = data;
this.level = level;
this.logger = logger;
}
/**
* Logger to log messages.
* use {@see Log4js#getLogger(String)} to get an instance.
* @constructor
* @param name name of category to log to
* @author Stephan Strittmatter
*/
function Logger (name, level) {
this.category = name || DEFAULT_CATEGORY;
if (level) {
this.setLevel(level);
}
}
util.inherits(Logger, events.EventEmitter);
Logger.DEFAULT_CATEGORY = DEFAULT_CATEGORY;
Logger.prototype.level = levels.TRACE;
Logger.prototype.setLevel = function(level) {
this.level = levels.toLevel(level, this.level || levels.TRACE);
};
Logger.prototype.removeLevel = function() {
delete this.level;
};
Logger.prototype.log = function() {
var logLevel = levels.toLevel(arguments[0], levels.INFO);
if (!this.isLevelEnabled(logLevel)) {
return;
}
var numArgs = arguments.length - 1;
var args = new Array(numArgs);
for (var i = 0; i < numArgs; i++) {
args[i] = arguments[i + 1];
}
this._log(logLevel, args);
};
Logger.prototype.isLevelEnabled = function(otherLevel) {
return this.level.isLessThanOrEqualTo(otherLevel);
};
['Trace','Debug','Info','Warn','Error','Fatal', 'Mark'].forEach(
function(levelString) {
addLevelMethods(levelString);
}
);
function addLevelMethods(level) {
level = levels.toLevel(level);
var levelStrLower = level.toString().toLowerCase();
var levelMethod = levelStrLower.replace(/_([a-z])/g, function(g) { return g[1].toUpperCase(); } );
var isLevelMethod = levelMethod[0].toUpperCase() + levelMethod.slice(1);
Logger.prototype['is'+isLevelMethod+'Enabled'] = function() {
return this.isLevelEnabled(level.toString());
};
Logger.prototype[levelMethod] = function () {
if (logWritesEnabled && this.isLevelEnabled(level)) {
var numArgs = arguments.length;
var args = new Array(numArgs);
for (var i = 0; i < numArgs; i++) {
args[i] = arguments[i];
}
this._log(level, args);
}
};
}
Logger.prototype._log = function(level, data) {
var loggingEvent = new LoggingEvent(this.category, level, data, this);
this.emit('log', loggingEvent);
};
/**
* Disable all log writes.
* @returns {void}
*/
function disableAllLogWrites() {
logWritesEnabled = false;
}
/**
* Enable log writes.
* @returns {void}
*/
function enableAllLogWrites() {
logWritesEnabled = true;
}
exports.LoggingEvent = LoggingEvent;
exports.Logger = Logger;
exports.disableAllLogWrites = disableAllLogWrites;
exports.enableAllLogWrites = enableAllLogWrites;
exports.addLevelMethods = addLevelMethods;
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