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// This is the **logger** module for *Karma*. It uses
// [log4js](https://github.com/nomiddlename/log4js-node) to handle and
// configure all logging that happens inside of *Karma*.
// ### Helpers and Setup
var log4js = require('log4js')
var helper = require('./helper')
var constant = require('./constants')
// Special Wrapper for Socket.io :(
var LogWrapper = function (name, level) {
this.logger = log4js.getLogger(name)
this.logger.setLevel(level)
}
var levels = ['error', 'warn', 'info', 'debug']
levels.forEach(function (level) {
LogWrapper.prototype[level] = function () {
this.logger[level].apply(this.logger, arguments)
}
})
// #### Public Functions
// Setup the logger by passing in the configuration options. It needs
// three argumentes:
//
// setup(logLevel, colors, appenders)
//
// * `logLevel`: *String* Defines the global log level.
// * `colors`: *Boolean* Use colors in the stdout or not.
// * `appenders`: *Array* This will be passed as appenders to log4js
// to allow for fine grained configuration of log4js. For more information
// see https://github.com/nomiddlename/log4js-node.
var setup = function (level, colors, appenders) {
// Turn color on/off on the console appenders with pattern layout
var pattern = colors ? constant.COLOR_PATTERN : constant.NO_COLOR_PATTERN
// If there are no appenders use the default one
appenders = helper.isDefined(appenders) ? appenders : [constant.CONSOLE_APPENDER]
appenders = appenders.map(function (appender) {
if (appender.type === 'console') {
if (helper.isDefined(appender.layout) && appender.layout.type === 'pattern') {
appender.layout.pattern = pattern
}
}
return appender
})
// Pass the values to log4js
log4js.setGlobalLogLevel(level)
log4js.configure({
appenders: appenders
})
}
// Create a new logger. There are two optional arguments
// * `name`, which defaults to `karma` and
// If the `name = 'socket.io'` this will create a special wrapper
// to be used as a logger for socket.io.
// * `level`, which defaults to the global level.
var create = function (name, level) {
if (name === 'socket.io') {
return new LogWrapper('socket.io', level)
} else {
var logger = log4js.getLogger(name || 'karma')
if (helper.isDefined(level)) {
logger.setLevel(level)
}
return logger
}
}
// #### Publish
exports.create = create
exports.setup = setup
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