legos/lib/lego-filter.js

Snap your streams together

'use strict';
/*
 *          _______
 *         /\      \
 *        /  \      \        _
 *       / O  \      \      | |
 *      /      \      \     | |     ___  __ _  ___  ___
 *     /      O \______\    | |    / _ \/ _` |/ _ \/ __|
 *     \ O      /      /    | |___|  __/ (_| | (_) \__ \
 *      \      /      /     |______\___|\__, |\___/|___/
 *       \  O /      /                   __/ |
 *        \  /      /                   |___/
 *         \/______/
 */

var util = require('util');
var abyss = require('abyss');
var LegoFn = require('./lego-fn');

function LegoFilter(filter, negate) {
	negate = !negate;
	LegoFn.call(this, function (item, cb) {
		abyss.test(filter, item, function (tested) {
			if (tested === negate) {
				return cb(item);
			}
		});
	});
}

util.inherits(LegoFilter, LegoFn);

module.exports = LegoFilter;