'use strict'; const log4js = require('log4js'); let loggerProvider = getDefaultLogProvider(); module.exports = exports = function getLogger(name) { return loggerProvider(name); }; exports.setLoggerProvider = function setLoggerProvider(provider) { validate(typeof provider == 'function', 'Provider needs to be a function'); const logger = provider('unleash:logger'); validate(typeof logger.debug == 'function', 'Logger must implement debug'); validate(typeof logger.info == 'function', 'Logger must implement info'); validate(typeof logger.warn == 'function', 'Logger must implement warn'); validate(typeof logger.error == 'function', 'Logger must implement error'); loggerProvider = provider; logger.info('Custom Logger Provider initalized.'); }; function getDefaultLogProvider() { let level; if (process.env.NODE_ENV === 'production') { level = log4js.levels.ERROR; } else if (process.env.NODE_ENV === 'test') { level = log4js.levels.FATAL; } else { level = log4js.levels.DEBUG; } log4js.configure({ appenders: [{ type: 'console' }], levels: { '[all]': level, }, }); return log4js.getLogger; } function validate(isValid, msg) { if (!isValid) { throw new TypeError(msg); } }