@log4js2/core/dist/appender/index.js

log4js2 is a fast and lightweight logging library that enables logging flexibility within JavaScript/TypeScript applications, similar to Apache's [Log4j2 library](https://logging.apache.org/log4j/2.x/). It can also serve as a drop-in replacement for log4

Object.defineProperty(exports, "__esModule", { value: true });
var utility_1 = require("../util/utility");
var appender_wrapper_1 = require("./appender.wrapper");
var log_appender_1 = require("./log.appender");
var _appenderMethods = new Set();
_appenderMethods.add('append');
_appenderMethods.add('isActive');
_appenderMethods.add('setLogLevel');
_appenderMethods.add('setLayout');
_appenderMethods.add('getLayout');
_appenderMethods.add('format');
var _appenders = new Map();
var _registeredLoggerAppenders = new Map();
/**
 * Validates that the appender
 *
 * @private
 * @function
 *
 * @params {APPENDER} appender
 * @throws {Error} if the appender is invalid
 */
var _validateAppender = function (appender) {
    // if we are running ES6, we can make sure it extends LogAppender
    // otherwise, it must be a function
    if (!(appender instanceof log_appender_1.LogAppender)) {
        return;
    }
    // ensure that the appender methods are present (and are functions)
    _appenderMethods.forEach(function (element) {
        if (!appender.prototype[element] || !(appender.prototype[element] instanceof Function)) {
            throw new Error("Invalid appender: missing/invalid method: " + element);
        }
    });
};
exports.getAppenderName = function (appender) { return appender.name || utility_1.getFunctionName(appender); };
/**
 * Adds an appender to the appender queue
 *
 * @function
 *
 * @param {LogAppender} appender
 * @param {string} name
 */
exports.addAppender = function (appender, name) {
    _validateAppender(appender);
    var appenderName = name || exports.getAppenderName(appender);
    // only put the appender into the set if it doesn't exist already
    if (!_appenders.has(appenderName)) {
        _appenders.set(appenderName, appender);
    }
    return appender;
};
/**
 * Registers an appender
 *
 * @param {Newable} appender
 */
exports.registerAppender = function (appender) {
    var name = exports.getAppenderName(appender);
    if (_appenders.has(name)) {
        exports.addAppender(appender);
    }
    _appenders.set(name, appender);
    return appender;
};
/**
 * Gets the appender with the specified name
 *
 * @param name
 */
exports.getAppender = function (name) { return _appenders.get(name); };
/**
 * Gets the appender instances. If the appenders parameter is set, then it will only fetch those within the array, otherwise return all
 *
 * @param {string[]} appenders
 */
exports.getLoggerAppenderInstances = function (appenders) {
    if (appenders && appenders.length > 0) {
        return appenders.map(function (value) {
            if (_registeredLoggerAppenders.has(value)) {
                var appenderConfig = _registeredLoggerAppenders.get(value);
                return new appender_wrapper_1.AppenderWrapper(appenderConfig.appender, appenderConfig);
            }
            throw new Error("Invalid appender reference '" + value + "'");
        });
    }
    else {
        var result_1 = [];
        _registeredLoggerAppenders.forEach(function (appenderConfig) {
            return result_1.push(new appender_wrapper_1.AppenderWrapper(appenderConfig.appender, appenderConfig));
        });
        return result_1;
    }
};
/**
 * Sets the appender configuration for a specified appender name
 *
 * @param {string} appenderName
 * @param {IAppenderConfiguration} config
 */
exports.setLoggerAppenderConfig = function (appenderName, config) {
    _registeredLoggerAppenders.set(appenderName, config);
};