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History.md	317 B	-rw-rw-rw-	2025-03-24 11:44
LICENSE	1.09 KB	-rw-rw-rw-	2025-03-24 11:44
README.md	3.7 KB	-rw-rw-rw-	2025-03-24 11:44
index.js	1.9 KB	-rw-rw-rw-	2025-03-24 11:44
package.json	752 B	-rw-rw-rw-	2025-03-24 11:44

Rename

var Promise = require('any-promise')
var assert = require('assert')

module.exports = thenify

/**
 * Turn async functions into promises
 *
 * @param {Function} fn
 * @return {Function}
 * @api public
 */

function thenify(fn, options) {
  assert(typeof fn === 'function')
  return createWrapper(fn, options)
}

/**
 * Turn async functions into promises and backward compatible with callback
 *
 * @param {Function} fn
 * @return {Function}
 * @api public
 */

thenify.withCallback = function (fn, options) {
  assert(typeof fn === 'function')
  options = options || {}
  options.withCallback = true
  return createWrapper(fn, options)
}

function createCallback(resolve, reject, multiArgs) {
  // default to true
  if (multiArgs === undefined) multiArgs = true
  return function(err, value) {
    if (err) return reject(err)
    var length = arguments.length

if (length <= 2 || !multiArgs) return resolve(value)

if (Array.isArray(multiArgs)) {
      var values = {}
      for (var i = 1; i < length; i++) values[multiArgs[i - 1]] = arguments[i]
      return resolve(values)
    }

var values = new Array(length - 1)
    for (var i = 1; i < length; ++i) values[i - 1] = arguments[i]
    resolve(values)
  }
}