1'use strict';
2
3Object.defineProperty(exports, "__esModule", {
4  value: true
5});
6exports.default = cargo;
7
8var _queue = require('./internal/queue.js');
9
10var _queue2 = _interopRequireDefault(_queue);
11
12function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
13
14/**
15 * Creates a `cargo` object with the specified payload. Tasks added to the
16 * cargo will be processed altogether (up to the `payload` limit). If the
17 * `worker` is in progress, the task is queued until it becomes available. Once
18 * the `worker` has completed some tasks, each callback of those tasks is
19 * called. Check out [these](https://camo.githubusercontent.com/6bbd36f4cf5b35a0f11a96dcd2e97711ffc2fb37/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f313637363837312f36383130382f62626330636662302d356632392d313165322d393734662d3333393763363464633835382e676966) [animations](https://camo.githubusercontent.com/f4810e00e1c5f5f8addbe3e9f49064fd5d102699/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f313637363837312f36383130312f38346339323036362d356632392d313165322d383134662d3964336430323431336266642e676966)
20 * for how `cargo` and `queue` work.
21 *
22 * While [`queue`]{@link module:ControlFlow.queue} passes only one task to one of a group of workers
23 * at a time, cargo passes an array of tasks to a single worker, repeating
24 * when the worker is finished.
25 *
26 * @name cargo
27 * @static
28 * @memberOf module:ControlFlow
29 * @method
30 * @see [async.queue]{@link module:ControlFlow.queue}
31 * @category Control Flow
32 * @param {AsyncFunction} worker - An asynchronous function for processing an array
33 * of queued tasks. Invoked with `(tasks, callback)`.
34 * @param {number} [payload=Infinity] - An optional `integer` for determining
35 * how many tasks should be processed per round; if omitted, the default is
36 * unlimited.
37 * @returns {module:ControlFlow.QueueObject} A cargo object to manage the tasks. Callbacks can
38 * attached as certain properties to listen for specific events during the
39 * lifecycle of the cargo and inner queue.
40 * @example
41 *
42 * // create a cargo object with payload 2
43 * var cargo = async.cargo(function(tasks, callback) {
44 *     for (var i=0; i<tasks.length; i++) {
45 *         console.log('hello ' + tasks[i].name);
46 *     }
47 *     callback();
48 * }, 2);
49 *
50 * // add some items
51 * cargo.push({name: 'foo'}, function(err) {
52 *     console.log('finished processing foo');
53 * });
54 * cargo.push({name: 'bar'}, function(err) {
55 *     console.log('finished processing bar');
56 * });
57 * await cargo.push({name: 'baz'});
58 * console.log('finished processing baz');
59 */
60function cargo(worker, payload) {
61  return (0, _queue2.default)(worker, 1, payload);
62}
63module.exports = exports['default'];