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+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+ value: true
+});
+exports.default = asyncify;
+
+var _isObject = require('lodash/isObject');
+
+var _isObject2 = _interopRequireDefault(_isObject);
+
+var _initialParams = require('./internal/initialParams');
+
+var _initialParams2 = _interopRequireDefault(_initialParams);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+/**
+ * Take a sync function and make it async, passing its return value to a
+ * callback. This is useful for plugging sync functions into a waterfall,
+ * series, or other async functions. Any arguments passed to the generated
+ * function will be passed to the wrapped function (except for the final
+ * callback argument). Errors thrown will be passed to the callback.
+ *
+ * If the function passed to `asyncify` returns a Promise, that promises's
+ * resolved/rejected state will be used to call the callback, rather than simply
+ * the synchronous return value.
+ *
+ * This also means you can asyncify ES2016 `async` functions.
+ *
+ * @name asyncify
+ * @static
+ * @memberOf module:Utils
+ * @method
+ * @alias wrapSync
+ * @category Util
+ * @param {Function} func - The synchronous function to convert to an
+ * asynchronous function.
+ * @returns {Function} An asynchronous wrapper of the `func`. To be invoked with
+ * (callback).
+ * @example
+ *
+ * // passing a regular synchronous function
+ * async.waterfall([
+ * async.apply(fs.readFile, filename, "utf8"),
+ * async.asyncify(JSON.parse),
+ * function (data, next) {
+ * // data is the result of parsing the text.
+ * // If there was a parsing error, it would have been caught.
+ * }
+ * ], callback);
+ *
+ * // passing a function returning a promise
+ * async.waterfall([
+ * async.apply(fs.readFile, filename, "utf8"),
+ * async.asyncify(function (contents) {
+ * return db.model.create(contents);
+ * }),
+ * function (model, next) {
+ * // `model` is the instantiated model object.
+ * // If there was an error, this function would be skipped.
+ * }
+ * ], callback);
+ *
+ * // es6 example
+ * var q = async.queue(async.asyncify(async function(file) {
+ * var intermediateStep = await processFile(file);
+ * return await somePromise(intermediateStep)
+ * }));
+ *
+ * q.push(files);
+ */
+function asyncify(func) {
+ return (0, _initialParams2.default)(function (args, callback) {
+ var result;
+ try {
+ result = func.apply(this, args);
+ } catch (e) {
+ return callback(e);
+ }
+ // if result is Promise object
+ if ((0, _isObject2.default)(result) && typeof result.then === 'function') {
+ result.then(function (value) {
+ callback(null, value);
+ }, function (err) {
+ callback(err.message ? err : new Error(err));
+ });
+ } else {
+ callback(null, result);
+ }
+ });
+}
+module.exports = exports['default'];
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