includejs

var fs = require('fs');
var pathHelper = require('path');

// var files = fs.readdirSync(pathHelper.join(__dirname, 'root'));

// files.forEach(function(a) {
// 	console.log(a);
// });

 // console.log(readConfig('root/a'));
// console.log(reorder(['a', 'b', 'c'], ['c', '*', 'a']));
// console.log(reorder(['a', 'b', 'c'], ['c', '*']));
// console.log(reorder(['a', 'b', 'c'], ['*', 'a']));
// console.log(reorder(['a', 'b', 'c'], ['*']));

walk(pathHelper.join(__dirname, 'root'));
function walk(path) {
	var config = readConfig(path);
	var files = fs.readdirSync(path);

	if(!config.length) {
		files = reorder(files, config);
	}

	files.forEach(function(a) {
		var p = pathHelper.join(path, a);
		if(fs.lstatSync(p).isDirectory()) {
			walk(p);
		} else if(/\.js/i.test(pathHelper.extname(a)))	 {
			console.log(a);
		}
	});
}

function reorder(files, orders) {
    var middle = null;

    orders.forEach(function(a, i) {
        if (a === '*') {
            if (middle != null) {
                throw new Error('* can only be used once');
            }
            middle = i;
            return;
        }

        remove(files, a);
    });

    if (middle == null) {
        return orders;
    }

    return orders.slice(0, middle)
        .concat(files)
        .concat(orders.slice(middle + 1, orders.length));
}

function remove(array, item) {
    var index = array.indexOf(item);

    array.splice(index, 1);

    return array;
}

function readConfig(path) {
    var config = pathHelper.join(path, '.includejs');
    if (!fs.existsSync(config)) {
        return null;
    }

    var contents = fs.readFileSync(config, {
        encoding: 'utf-8'
    });
    var lines = contents.split('\n');

    return lines.filter(function(a) {
    	return /^\s*$/.test(a) === false;
    });
}