All files legacy.js

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'use strict';
 
const util = require('util');
const TransportStream = require('./');
 
/**
 * Constructor function for the LegacyTransportStream. This is an internal wrapper
 * `winston >= 3` uses to wrap older transports implementing log(level, message, meta).
 *
 * @param  {Object} opts Options for this TransportStream instance.
 *   @param {Transpot} opts.transport winston@2 or older Transport to wrap.
 */
var LegacyTransportStream = module.exports = function LegacyTransportStream(opts) {
  opts = opts || {};
  if (!opts.transport || typeof opts.transport.log !== 'function') {
    throw new Error('Invalid transport, must be an object with a log method.');
  }
 
  TransportStream.call(this, opts);
 
  var self = this;
  this.transport = opts.transport;
  this.level = opts.transport.level;
  this.handleExceptions = opts.transport.handleExceptions;
 
  console.error([
    `${opts.transport.name} is a legacy winston transport. Consider upgrading: `,
    '- Upgrade docs: https://github.com/winstonjs/winston/tree/master/UPGRADE.md'
  ].join('\n'));
 
  //
  // Properly bubble up errors from the transport to the LegacyTransportStream
  // instance, but only once no matter how many times this transport is shared.
  //
  function transportError(err) {
    self.emit('error', err, self.transport);
  }
 
  Eif (!this.transport.__winstonError) {
    this.transport.__winstonError = transportError;
    this.transport.on('error', this.transport.__winstonError);
  }
};
 
util.inherits(LegacyTransportStream, TransportStream);
 
/*
 * @private function _write(info)
 * Writes the info object to our transport instance.
 */
LegacyTransportStream.prototype._write = function (info, enc, callback) {
  //
  // Remark: This has to be handled in the base transport now because we cannot
  // conditionally write to our pipe targets as stream.
  //
  if (!this.level || this.levels[this.level] >= this.levels[info.level]) {
    this.transport.log(info.level, info.message, info, function () {});
  }
 
  callback(null);
};
 
/*
 * Clean up error handling state on the legacy transport associated
 * with this instance.
 */
LegacyTransportStream.prototype.close = function () {
  if (this.transport.close) {
    this.transport.close();
  }
 
  if (this.transport.__winstonError) {
    this.transport.removeListener('error', this.transport.__winstonError);
  }
};