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log.js
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log.js
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import Utils from "./utils";
/*eslint-disable no-unused-vars*/
class Logger {
debug(data) {}
info(data) {}
warn(data) {}
error(data) {}
advancedLog(data) {}
}
/*eslint-enable no-unused-vars*/
const LogLevel = {
DEBUG: 10,
INFO: 20,
WARN: 30,
ERROR: 40,
ADVANCED_LOG: 50,
};
class LogManagerImpl {
constructor() {
this.updateLoggerConfig();
}
writeToClientLogger(level, logStatement, logMetaData) {
if (!this.hasClientLogger()) {
return;
}
var levelStringValue = getLogLevelByValue(level);
switch (level) {
case LogLevel.DEBUG:
return this._clientLogger.debug(levelStringValue, logStatement, logMetaData) || logStatement;
case LogLevel.INFO:
return this._clientLogger.info(levelStringValue, logStatement, logMetaData) || logStatement;
case LogLevel.WARN:
return this._clientLogger.warn(levelStringValue, logStatement, logMetaData) || logStatement;
case LogLevel.ERROR:
return this._clientLogger.error(levelStringValue, logStatement, logMetaData) || logStatement;
case LogLevel.ADVANCED_LOG:
return this._advancedLogWriter && this._clientLogger[this._advancedLogWriter] && this._clientLogger[this._advancedLogWriter](levelStringValue, logStatement, logMetaData) || logStatement;
}
}
isLevelEnabled(level) {
return level >= this._level;
}
hasClientLogger() {
return this._clientLogger !== null;
}
getLogger(options = {}) {
// option: {prefix: string; logMetaData: object}
return new LoggerWrapperImpl(options);
}
updateLoggerConfig(inputConfig) {
var config = inputConfig || {};
this._level = config.level || LogLevel.INFO;
//enabled advancedLogWriter
this._advancedLogWriter = "warn";
if (isValidAdvancedLogConfig(config.advancedLogWriter, config.customizedLogger)) {
this._advancedLogWriter = config.advancedLogWriter;
}
//enable clientLogger
if((config.customizedLogger && typeof config.customizedLogger === "object") ||
(config.logger && typeof config.logger === "object")) {
this.useClientLogger = true;
}
this._clientLogger = this.selectLogger(config);
}
selectLogger(config) {
if(config.customizedLogger && typeof config.customizedLogger === "object") {
return config.customizedLogger;
}
if(config.logger && typeof config.logger === "object") {
return config.logger;
}
if(config.useDefaultLogger) {
return createConsoleLogger();
}
return null;
}
}
const LogManager = new LogManagerImpl();
class LoggerWrapper {
debug() {}
info() {}
warn() {}
error() {}
}
class LoggerWrapperImpl extends LoggerWrapper {
constructor(options) {
super();
this.options = options || {};
}
debug(...args) {
return this._log(LogLevel.DEBUG, args);
}
info(...args) {
return this._log(LogLevel.INFO, args);
}
warn(...args) {
return this._log(LogLevel.WARN, args);
}
error(...args) {
return this._log(LogLevel.ERROR, args);
}
advancedLog(...args) {
return this._log(LogLevel.ADVANCED_LOG, args);
}
_shouldLog(level) {
return LogManager.hasClientLogger() && LogManager.isLevelEnabled(level);
}
_writeToClientLogger(level, logStatement) {
return LogManager.writeToClientLogger(level, logStatement, this.options.logMetaData);
}
_log(level, args) {
if (this._shouldLog(level)) {
var logStatement = LogManager.useClientLogger ? args : this._convertToSingleStatement(args);
return this._writeToClientLogger(level, logStatement);
}
}
_convertToSingleStatement(args) {
var date = new Date(Date.now()).toISOString();
var logStatement = `[${date}]`;
if (this.options) {
this.options.prefix ? logStatement += " " + this.options.prefix + ":" : logStatement += "";
}
for (var index = 0; index < args.length; index++) {
var arg = args[index];
logStatement += " " + this._convertToString(arg);
}
return logStatement;
}
_convertToString(arg) {
try {
if (!arg) {
return "";
}
if (Utils.isString(arg)) {
return arg;
}
if (Utils.isObject(arg) && Utils.isFunction(arg.toString)) {
var toStringResult = arg.toString();
if (toStringResult !== "[object Object]") {
return toStringResult;
}
}
return JSON.stringify(arg);
} catch (error) {
console.error("Error while converting argument to string", arg, error);
return "";
}
}
}
function getLogLevelByValue(value) {
switch(value) {
case 10: return "DEBUG";
case 20: return "INFO";
case 30: return "WARN";
case 40: return "ERROR";
case 50: return "ADVANCED_LOG";
}
}
function isValidAdvancedLogConfig(advancedLogVal, customizedLogger) {
const customizedLoggerKeys = customizedLogger && Object.keys(customizedLogger);
if (customizedLoggerKeys && customizedLoggerKeys.indexOf(advancedLogVal) === -1) {
console.error(`customizedLogger: incorrect value for loggerConfig:advancedLogWriter; use valid values from list ${customizedLoggerKeys} but used ${advancedLogVal}`);
return false;
}
const defaultLoggerKeys = ["warn", "info", "debug", "log"];
if (advancedLogVal && defaultLoggerKeys.indexOf(advancedLogVal) === -1) {
console.error(`incorrect value for loggerConfig:advancedLogWriter; use valid values from list ${defaultLoggerKeys} but used ${advancedLogVal}`);
return false;
}
return true;
}
var createConsoleLogger = () => {
var logger = new LoggerWrapper();
logger.debug = console.debug.bind(window.console);
logger.info = console.info.bind(window.console);
logger.warn = console.warn.bind(window.console);
logger.error = console.error.bind(window.console);
return logger;
};
export { LogManager, Logger, LogLevel };