text: 'use strict';
  
  const PromiseProvider = require('../promise_provider');
  
  const emittedSymbol = Symbol.for('mongoose:emitted');
  
  module.exports = function promiseOrCallback(callback, fn, ee, Promise) {
    if (typeof callback === 'function') {
      return fn(function(error) {
        if (error != null) {
          if (ee != null && ee.listeners != null && ee.listeners('error').length > 0 && !error[emittedSymbol]) {
            error[emittedSymbol] = true;
            ee.emit('error', error);
          }
          try {
            callback(error);
          } catch (error) {
            return process.nextTick(() => {
              throw error;
            });
          }
          return;
        }
        callback.apply(this, arguments);
      });
    }
  
    Promise = Promise || PromiseProvider.get();
  
    return new Promise((resolve, reject) => {
      fn(function(error, res) {
        if (error != null) {
          if (ee != null && ee.listeners != null && ee.listeners('error').length > 0 && !error[emittedSymbol]) {
            error[emittedSymbol] = true;
            ee.emit('error', error);
          }
          return reject(error);
        }
        if (arguments.length > 2) {
          return resolve(Array.prototype.slice.call(arguments, 1));
        }
        resolve(res);
      });
    });
  };
  