bot18
Version:
A high-frequency cryptocurrency trading bot by Zenbot creator @carlos8f
73 lines • 2.53 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const log = require("loglevel");
const util_1 = require("./util");
/**
* Severity levels for log entries
*/
var LogLevel;
(function (LogLevel) {
LogLevel["ERROR"] = "error";
LogLevel["WARN"] = "warn";
LogLevel["INFO"] = "info";
LogLevel["DEBUG"] = "debug";
})(LogLevel = exports.LogLevel || (exports.LogLevel = {}));
// Implements logger name prefixing using loglevel plugin API. Based on example: http://jsbin.com/xehoye
const originalFactory = log.methodFactory;
// @ts-ignore this is the recommended way to use the plugin API for loglevel
log.methodFactory = function (methodName, logLevel, loggerName) {
const rawMethod = originalFactory(methodName, logLevel, loggerName);
return function () {
const messages = [`[${methodName.toUpperCase()}]`, loggerName];
for (let i = 0; i < arguments.length; i = i + 1) {
messages.push(arguments[i]);
}
rawMethod.apply(undefined, messages);
};
};
/**
* INTERNAL interface for getting or creating a named Logger
*/
// TODO: implement logger name prefixing (example plugins available on the loglevel package's site)
exports.getLogger = log.getLogger;
/**
* Decides whether `level` is more severe than the `threshold` for logging. When this returns true, logs should be
* output.
*
* @param level log level to check
* @param threshold lower bound on severity, expressed as a number inside the loglevel package
*/
function isMoreSevere(level, threshold) {
if (level === LogLevel.DEBUG) {
return threshold <= 1;
}
if (level === LogLevel.INFO) {
return threshold <= 2;
}
if (level === LogLevel.WARN) {
return threshold <= 3;
}
if (level === LogLevel.ERROR) {
return threshold <= 4;
}
return true;
}
/**
* INTERNAL function for transforming an external LoggerFunc type into the internal Logger interface
* @param name
* @param loggingFunc
*/
function loggerFromLoggingFunc(name, loggingFunc) {
const logger = log.getLogger(name);
logger.methodFactory = function (methodName, logLevel, loggerName) {
if (isMoreSevere(methodName, logLevel)) {
return function (...msg) {
loggingFunc(methodName, `${loggerName} ${msg.map(m => JSON.stringify(m)).join(' ')}`);
};
}
return util_1.noop;
};
return logger;
}
exports.loggerFromLoggingFunc = loggerFromLoggingFunc;
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