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// Logging
//
// FATAL: an unhandleable error that results in a program crash
// ERROR: a handleable error condition
// WARN: a warning
// INFO: generic (useful) information about system operation
// DEBUG: low-level information for developers
// (Stolen from Ruby)
//
var Logger = exports.Logger = function(output) {
if (typeof output === "string")
this.output = system.fs.open(output, "a");
else
this.output = output;
this.level = Logger.INFO;
};
Logger.FATAL = 0;
Logger.ERROR = 1;
Logger.WARN = 2;
Logger.INFO = 3;
Logger.DEBUG = 4;
Logger.SEV_LABEL = ["FATAL", "ERROR", "WARN" , "INFO" , "DEBUG"];
Logger.prototype.fatal = function() {
return this.add(Logger.FATAL, this.format(Logger.FATAL, arguments));
};
Logger.prototype.error = function() {
return this.add(Logger.ERROR, this.format(Logger.ERROR, arguments));
};
Logger.prototype.warn = function() {
return this.add(Logger.WARN, this.format(Logger.WARN, arguments));
};
Logger.prototype.info = function() {
return this.add(Logger.INFO, this.format(Logger.INFO, arguments));
};
Logger.prototype.debug = function() {
return this.add(Logger.DEBUG, this.format(Logger.DEBUG, arguments));
};
Logger.prototype.add = function(severity, message, progname) {
if (severity > this.level)
return false;
this.output.print(message || progname);
};
Logger.prototype.format = function(severity, args) {
return new Date() + " ["+Logger.SEV_LABEL[severity].toLowerCase()+"] " +Array.prototype.join.apply(args, [" "]).replace(/\n/g, "");
};
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