gelfy/build/adapters/bunyan.js

GELF (Graylog Extended Log Format) Integrations for Node.js Logging Libraries

"use strict";Object.defineProperty(exports, "__esModule", { value: true });exports.default = void 0;class BunyanAdapter {
  constructor(gelfStream) {
    this.stream = gelfStream;
    this.gelfClient = this.stream.client;
  }

  /**
   * Map bunyan log level to GELF log level
   * @param {number} bunyanLevel
   * @returns {number}
   */
  mapGelfLevel(bunyanLevel) {
    const gelfLevel = this.gelfClient.config.levels;

    switch (bunyanLevel) {
      case 10:return gelfLevel.debug;
      case 20:return gelfLevel.debug;
      case 30:return gelfLevel.info;
      case 40:return gelfLevel.warning;
      case 50:return gelfLevel.error;
      case 60:return gelfLevel.emergency;
      default:return gelfLevel.warning;}

  }

  createTransformer() {
    return (log) => {
      const ignoreFields = ['msg', 'hostname', 'v'];
      const gelfMsg = {
        time: +new Date(log.time) / 1000,
        short_message: log.msg,
        facility: log.name,
        host: log.hostname,
        bunyan_level: log.level,
        level: this.mapGelfLevel(log.level) };


      if (log.err && log.err.stack) {
        const errFile = log.err.stack.match(/\n\s+at .+ \(([^:]+):([0-9]+)/);
        if (errFile) {
          if (typeof errFile[1] === 'string' && errFile[1].trim()) gelfMsg.file = errFile[1]; // eslint-disable-line prefer-destructuring
          if (typeof errFile[2] === 'string' && errFile[1].trim()) gelfMsg.line = errFile[2]; // eslint-disable-line prefer-destructuring
        }
      }

      // TODO: Improve this using `reduce`
      for (const key in log) {// eslint-disable-line no-restricted-syntax
        if (Object.hasOwnProperty.call(log, key)) {
          if (ignoreFields.indexOf(key) < 0 && !Object.hasOwnProperty.call(gelfMsg, key)) {
            gelfMsg[key] = log[key];
          }
        }
      }

      return gelfMsg;
    };
  }}exports.default = BunyanAdapter;