artycles/lib/utils.js

var crypto = require("crypto"),
	fs = require("fs"),
	path = require("path"),
	os = require("os");

// Helpers
var utils = {

	extend: function(destination, source) {
		for (var property in source) {
			if (source[property] && source[property].constructor && source[property].constructor === Object) {
				destination[property] = destination[property] || {};
				arguments.callee(destination[property], source[property]);
			} else {
				destination[property] = source[property];
			}
		}
		return destination;
	},

	// creates a unique temp dir
	tmpDir: function(){
		var tmp = os.tmpDir();
		var folder = "artycles_"+ crypto.randomBytes(4).readUInt32LE(0); // random folder name
		var dir = tmp +"/"+ folder;
		fs.mkdirSync( dir );
		return dir+"/"; //add ending slash
	},

	// filename based on prefix or time
	filename: function( options ){
		// fallbacks
		options = options || {
			prefix: "",
			scramble: true
		};
		var name = "";
		if( options.prefix.length ){
			name += options.prefix;
		}
		var d = new Date();
		// add the date
		name += d.getFullYear() +""+ dd(d.getMonth()+1) +""+ dd(d.getDate());
		// add the time
		name += "-"+ dd(d.getHours()) +""+ dd(d.getMinutes()) +""+ dd(d.getSeconds()) +""+ d.getMilliseconds();

		// add a random hex number (6 digits)
		if( options.scramble ) name += "-"+ crypto.randomBytes(Math.ceil(6/2)).toString('hex').slice(0,6);
		//
		return name;
	},

	// recursive rmdir
	rmdir: function( dir ) {
		if( fs.existsSync( dir ) ) {
			fs.readdirSync( dir ).forEach(function(file,index){
				var curDir = dir + "/" + file;
				if(fs.lstatSync(curDir).isDirectory()) { // recurse
					deleteFolderRecursive(curDir);
				} else { // delete file
					fs.unlinkSync(curDir);
				}
			});
			fs.rmdirSync( dir );
		}
	},

	// recursive mkdir
	mkdir: function( dir, mode ) {
		mode = mode || 0666;
		if( !fs.existsSync( dir ) ) {
			try {
				fs.mkdirSync( dir );
			} catch(e) {
				if ( e.code != 'EEXIST' ){
					//throw e;
					//Create all the parents recursively
					this.mkdir(path.dirname( dir ), mode );
					//And then the directory
					this.mkdir( dir, mode );
				}
			}
		}
	}
}

// helpers

// double digits
function dd( num ){
	return ("0" + num).slice(-2);
}


module.exports = utils;