continuify/build/continuify.js

Converts an array of functions into continuation-passing style

'use strict';

/**
 * converts an array of functions into a continuation-passing style
 * @param {Array} funcList
 * @param {Object} data
 * @param {Object|null} context
 * @param {Function|null} onFinishedCallback
 */

Object.defineProperty(exports, "__esModule", {
	value: true
});
var continuify = function continuify() {
	var funcList = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
	var data = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
	var context = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;
	var onFinishedCallback = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : null;

	var idx = 0;

	if (funcList.length < 1 && onFinishedCallback) {
		onFinishedCallback.call(context, data);
	} else if (funcList.length < 1 && !onFinishedCallback) {
		return null;
	}

	var next = function next(value) {
		var layer = funcList[idx++];

		if (!layer && onFinishedCallback) {
			onFinishedCallback.call(context, value);
		} else if (!layer && !onFinishedCallback) {
			return null;
		} else {
			layer.call(context, value, next);
		}
	};

	next.call(context, data);
};

exports.default = continuify;
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