298 lines
8.1 KiB
JavaScript
298 lines
8.1 KiB
JavaScript
var dateFormat = require('./date_format')
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, os = require('os')
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, eol = os.EOL || '\n'
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, util = require('util')
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, replacementRegExp = /%[sdj]/g
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, layoutMakers = {
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"messagePassThrough": function() { return messagePassThroughLayout; }
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, "basic": function() { return basicLayout; }
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, "colored": function() { return colouredLayout; }
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, "coloured": function() { return colouredLayout; }
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, "pattern": function (config) {
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var pattern = config.pattern || undefined;
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var tokens = config.tokens || undefined;
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return patternLayout(pattern, tokens);
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}
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}
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, colours = {
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ALL: "grey"
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, TRACE: "blue"
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, DEBUG: "cyan"
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, INFO: "green"
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, WARN: "yellow"
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, ERROR: "red"
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, FATAL: "magenta"
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, OFF: "grey"
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};
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function formatLogData(logData) {
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var output = ""
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, data = Array.isArray(logData) ? logData.slice() : Array.prototype.slice.call(arguments)
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, format = data.shift();
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if (typeof format === "string") {
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output = format.replace(replacementRegExp, function(match) {
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switch (match) {
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case "%s": return new String(data.shift());
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case "%d": return new Number(data.shift());
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case "%j": return JSON.stringify(data.shift());
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default:
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return match;
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};
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});
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} else {
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//put it back, it's not a format string
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data.unshift(format);
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}
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data.forEach(function (item) {
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if (output) {
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output += ' ';
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}
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output += util.inspect(item);
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if (item && item.stack) {
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output += "\n" + item.stack;
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}
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});
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return output;
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}
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var styles = {
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//styles
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'bold' : [1, 22],
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'italic' : [3, 23],
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'underline' : [4, 24],
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'inverse' : [7, 27],
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//grayscale
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'white' : [37, 39],
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'grey' : [90, 39],
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'black' : [90, 39],
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//colors
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'blue' : [34, 39],
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'cyan' : [36, 39],
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'green' : [32, 39],
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'magenta' : [35, 39],
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'red' : [31, 39],
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'yellow' : [33, 39]
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};
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function colorizeStart(style) {
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return style ? '\033[' + styles[style][0] + 'm' : '';
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}
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function colorizeEnd(style) {
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return style ? '\033[' + styles[style][1] + 'm' : '';
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}
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/**
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* Taken from masylum's fork (https://github.com/masylum/log4js-node)
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*/
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function colorize (str, style) {
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return colorizeStart(style) + str + colorizeEnd(style);
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}
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function timestampLevelAndCategory(loggingEvent, colour) {
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var output = colorize(
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formatLogData(
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'[%s] [%s] %s - '
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, dateFormat.asString(loggingEvent.startTime)
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, loggingEvent.level
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, loggingEvent.categoryName
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)
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, colour
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);
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return output;
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}
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/**
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* BasicLayout is a simple layout for storing the logs. The logs are stored
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* in following format:
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* <pre>
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* [startTime] [logLevel] categoryName - message\n
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* </pre>
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*
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* @author Stephan Strittmatter
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*/
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function basicLayout (loggingEvent) {
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return timestampLevelAndCategory(loggingEvent) + formatLogData(loggingEvent.data);
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}
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/**
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* colouredLayout - taken from masylum's fork.
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* same as basicLayout, but with colours.
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*/
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function colouredLayout (loggingEvent) {
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return timestampLevelAndCategory(loggingEvent, colours[loggingEvent.level.toString()]) + formatLogData(loggingEvent.data);
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}
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function messagePassThroughLayout (loggingEvent) {
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return formatLogData(loggingEvent.data);
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}
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/**
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* PatternLayout
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* Format for specifiers is %[padding].[truncation][field]{[format]}
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* e.g. %5.10p - left pad the log level by 5 characters, up to a max of 10
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* Fields can be any of:
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* - %r time in toLocaleTimeString format
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* - %p log level
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* - %c log category
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* - %m log data
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* - %d date in various formats
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* - %% %
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* - %n newline
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* - %x{<tokenname>} add dynamic tokens to your log. Tokens are specified in the tokens parameter
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* You can use %[ and %] to define a colored block.
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*
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* Tokens are specified as simple key:value objects.
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* The key represents the token name whereas the value can be a string or function
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* which is called to extract the value to put in the log message. If token is not
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* found, it doesn't replace the field.
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*
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* A sample token would be: { "pid" : function() { return process.pid; } }
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*
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* Takes a pattern string, array of tokens and returns a layout function.
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* @param {String} Log format pattern String
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* @param {object} map object of different tokens
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* @return {Function}
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* @author Stephan Strittmatter
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* @author Jan Schmidle
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*/
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function patternLayout (pattern, tokens) {
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var TTCC_CONVERSION_PATTERN = "%r %p %c - %m%n";
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var regex = /%(-?[0-9]+)?(\.?[0-9]+)?([\[\]cdmnprx%])(\{([^\}]+)\})?|([^%]+)/;
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pattern = pattern || TTCC_CONVERSION_PATTERN;
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return function(loggingEvent) {
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var formattedString = "";
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var result;
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var searchString = pattern;
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while ((result = regex.exec(searchString))) {
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var matchedString = result[0];
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var padding = result[1];
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var truncation = result[2];
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var conversionCharacter = result[3];
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var specifier = result[5];
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var text = result[6];
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// Check if the pattern matched was just normal text
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if (text) {
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formattedString += "" + text;
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} else {
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// Create a raw replacement string based on the conversion
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// character and specifier
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var replacement = "";
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switch(conversionCharacter) {
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case "c":
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var loggerName = loggingEvent.categoryName;
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if (specifier) {
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var precision = parseInt(specifier, 10);
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var loggerNameBits = loggingEvent.categoryName.split(".");
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if (precision >= loggerNameBits.length) {
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replacement = loggerName;
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} else {
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replacement = loggerNameBits.slice(loggerNameBits.length - precision).join(".");
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}
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} else {
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replacement = loggerName;
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}
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break;
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case "d":
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var format = dateFormat.ISO8601_FORMAT;
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if (specifier) {
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format = specifier;
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// Pick up special cases
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if (format == "ISO8601") {
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format = dateFormat.ISO8601_FORMAT;
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} else if (format == "ABSOLUTE") {
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format = dateFormat.ABSOLUTETIME_FORMAT;
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} else if (format == "DATE") {
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format = dateFormat.DATETIME_FORMAT;
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}
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}
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// Format the date
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replacement = dateFormat.asString(format, loggingEvent.startTime);
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break;
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case "m":
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replacement = formatLogData(loggingEvent.data);
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break;
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case "n":
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replacement = eol;
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break;
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case "p":
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replacement = loggingEvent.level.toString();
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break;
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case "r":
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replacement = "" + loggingEvent.startTime.toLocaleTimeString();
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break;
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case "[":
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replacement = colorizeStart(colours[loggingEvent.level.toString()]);
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break;
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case "]":
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replacement = colorizeEnd(colours[loggingEvent.level.toString()]);
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break;
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case "%":
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replacement = "%";
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break;
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case "x":
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if(typeof(tokens[specifier]) !== 'undefined') {
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if(typeof(tokens[specifier]) === 'function') {
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replacement = tokens[specifier]();
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} else {
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replacement = tokens[specifier];
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}
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} else {
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replacement = matchedString;
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}
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break;
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default:
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replacement = matchedString;
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break;
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}
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// Format the replacement according to any padding or
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// truncation specified
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var len;
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// First, truncation
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if (truncation) {
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len = parseInt(truncation.substr(1), 10);
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replacement = replacement.substring(0, len);
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}
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// Next, padding
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if (padding) {
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if (padding.charAt(0) == "-") {
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len = parseInt(padding.substr(1), 10);
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// Right pad with spaces
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while (replacement.length < len) {
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replacement += " ";
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}
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} else {
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len = parseInt(padding, 10);
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// Left pad with spaces
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while (replacement.length < len) {
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replacement = " " + replacement;
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}
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}
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}
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formattedString += replacement;
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}
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searchString = searchString.substr(result.index + result[0].length);
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}
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return formattedString;
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};
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};
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module.exports = {
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basicLayout: basicLayout
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, messagePassThroughLayout: messagePassThroughLayout
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, patternLayout: patternLayout
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, colouredLayout: colouredLayout
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, coloredLayout: colouredLayout
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, layout: function(name, config) {
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return layoutMakers[name] && layoutMakers[name](config);
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}
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};
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