// provides a set of functions wrapping some common functions from the async module

// afford the patters of specifying iterator functions without having to explicitly

// bind everything to the calling context, at the expense of a single this argument

'use strict';

let Async = require('async');

module.exports = {

series (context, series, callback = null, bindCallback = false) {

let boundSeries = series.map(fn => fn.bind(context));

let boundCallback = bindCallback ? callback.bind(context) : callback;

Async.series(boundSeries, boundCallback);

},

parallel (context, parallel, callback = null, bindCallback = false) {

let boundParallel = parallel.map(fn => fn.bind(context));

let boundCallback = bindCallback ? callback.bind(context) : callback;

Async.parallel(boundParallel, boundCallback);

},

forEach (context, array, iterator, callback = null, bindCallback = false) {

let boundIterator = iterator.bind(context);

let boundCallback = bindCallback ? callback.bind(context) : callback;

Async.forEach(array, boundIterator, boundCallback);

},

forEachSeries (context, array, iterator, callback = null, bindCallback = false) {

let boundIterator = iterator.bind(context);

let boundCallback = bindCallback ? callback.bind(context) : callback;

Async.forEachSeries(array, boundIterator, boundCallback);

},

forEachLimit (context, array, limit, iterator, callback = null, bindCallback = false) {

let boundIterator = iterator.bind(context);

let boundCallback = bindCallback ? callback.bind(context) : callback;

Async.forEachLimit(array, limit, boundIterator, boundCallback);

},

whilst (context, condition, iterator, callback = null, bindCallback = false) {

let boundIterator = iterator.bind(context);

let boundCallback = bindCallback ? callback.bind(context) : callback;

Async.whilst(condition, boundIterator, boundCallback);

},

times (context, n, iterator, callback = null, bindCallback = false) {

let boundIterator = iterator.bind(context);

let boundCallback = bindCallback ? callback.bind(context) : callback;

Async.times(n, boundIterator, boundCallback);

},

timesSeries (context, n, iterator, callback = null, bindCallback = false) {

let boundIterator = iterator.bind(context);

let boundCallback = bindCallback ? callback.bind(context) : callback;

Async.timesSeries(n, boundIterator, boundCallback);

}

};