123 lines
6.7 KiB
JavaScript
123 lines
6.7 KiB
JavaScript
/**
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* create-logger.js: Logger factory for winston logger instances.
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*
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* (C) 2010 Charlie Robbins
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* MIT LICENCE
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*/
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'use strict';
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function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
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function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
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function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
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function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == _typeof(i) ? i : String(i); }
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function _toPrimitive(t, r) { if ("object" != _typeof(t) || !t) return t; var e = t[Symbol.toPrimitive]; if (void 0 !== e) { var i = e.call(t, r || "default"); if ("object" != _typeof(i)) return i; throw new TypeError("@@toPrimitive must return a primitive value."); } return ("string" === r ? String : Number)(t); }
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function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
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function _callSuper(t, o, e) { return o = _getPrototypeOf(o), _possibleConstructorReturn(t, _isNativeReflectConstruct() ? Reflect.construct(o, e || [], _getPrototypeOf(t).constructor) : o.apply(t, e)); }
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function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }
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function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
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function _isNativeReflectConstruct() { try { var t = !Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); } catch (t) {} return (_isNativeReflectConstruct = function _isNativeReflectConstruct() { return !!t; })(); }
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function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf.bind() : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
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function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); Object.defineProperty(subClass, "prototype", { writable: false }); if (superClass) _setPrototypeOf(subClass, superClass); }
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function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
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var _require = require('triple-beam'),
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LEVEL = _require.LEVEL;
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var config = require('./config');
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var Logger = require('./logger');
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var debug = require('@dabh/diagnostics')('winston:create-logger');
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function isLevelEnabledFunctionName(level) {
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return 'is' + level.charAt(0).toUpperCase() + level.slice(1) + 'Enabled';
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}
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/**
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* Create a new instance of a winston Logger. Creates a new
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* prototype for each instance.
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* @param {!Object} opts - Options for the created logger.
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* @returns {Logger} - A newly created logger instance.
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*/
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module.exports = function () {
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var opts = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
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//
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// Default levels: npm
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//
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opts.levels = opts.levels || config.npm.levels;
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/**
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* DerivedLogger to attach the logs level methods.
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* @type {DerivedLogger}
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* @extends {Logger}
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*/
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var DerivedLogger = /*#__PURE__*/function (_Logger) {
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_inherits(DerivedLogger, _Logger);
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/**
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* Create a new class derived logger for which the levels can be attached to
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* the prototype of. This is a V8 optimization that is well know to increase
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* performance of prototype functions.
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* @param {!Object} options - Options for the created logger.
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*/
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function DerivedLogger(options) {
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_classCallCheck(this, DerivedLogger);
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return _callSuper(this, DerivedLogger, [options]);
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}
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return _createClass(DerivedLogger);
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}(Logger);
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var logger = new DerivedLogger(opts);
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//
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// Create the log level methods for the derived logger.
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//
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Object.keys(opts.levels).forEach(function (level) {
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debug('Define prototype method for "%s"', level);
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if (level === 'log') {
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// eslint-disable-next-line no-console
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console.warn('Level "log" not defined: conflicts with the method "log". Use a different level name.');
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return;
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}
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//
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// Define prototype methods for each log level e.g.:
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// logger.log('info', msg) implies these methods are defined:
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// - logger.info(msg)
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// - logger.isInfoEnabled()
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//
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// Remark: to support logger.child this **MUST** be a function
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// so it'll always be called on the instance instead of a fixed
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// place in the prototype chain.
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//
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DerivedLogger.prototype[level] = function () {
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// Prefer any instance scope, but default to "root" logger
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var self = this || logger;
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// Optimize the hot-path which is the single object.
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for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
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args[_key] = arguments[_key];
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}
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if (args.length === 1) {
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var msg = args[0];
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var info = msg && msg.message && msg || {
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message: msg
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};
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info.level = info[LEVEL] = level;
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self._addDefaultMeta(info);
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self.write(info);
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return this || logger;
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}
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// When provided nothing assume the empty string
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if (args.length === 0) {
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self.log(level, '');
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return self;
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}
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// Otherwise build argument list which could potentially conform to
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// either:
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// . v3 API: log(obj)
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// 2. v1/v2 API: log(level, msg, ... [string interpolate], [{metadata}], [callback])
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return self.log.apply(self, [level].concat(args));
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};
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DerivedLogger.prototype[isLevelEnabledFunctionName(level)] = function () {
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return (this || logger).isLevelEnabled(level);
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};
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});
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return logger;
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}; |