/*!
* Tobi - CookieJar
* Copyright(c) 2010 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/

/**
* Module dependencies.
*/

var url = require('url');

/**
* Initialize a new `CookieJar`.
*
* @api private
*/

var CookieJar = exports = module.exports = function CookieJar() {
  this.cookies = [];
};

/**
* Add the given `cookie` to the jar.
*
* @param {Cookie} cookie
* @api private
*/

CookieJar.prototype.add = function(cookie){
  this.cookies = this.cookies.filter(function(c){
    // Avoid duplication (same path, same name)
    return !(c.name == cookie.name && c.path == cookie.path);
  });
  this.cookies.push(cookie);
};

/**
* Get cookies for the given `req`.
*
* @param {IncomingRequest} req
* @return {Array}
* @api private
*/

CookieJar.prototype.get = function(req){
  var path = url.parse(req.url).pathname
    , now = new Date
    , specificity = {};
  return this.cookies.filter(function(cookie){
    if (0 == path.indexOf(cookie.path) && now < cookie.expires
      && cookie.path.length > (specificity[cookie.name] || 0))
      return specificity[cookie.name] = cookie.path.length;
  });
};

/**
* Return Cookie string for the given `req`.
*
* @param {IncomingRequest} req
* @return {String}
* @api private
*/

CookieJar.prototype.cookieString = function(req){
  var cookies = this.get(req);
  if (cookies.length) {
    return cookies.map(function(cookie){
      return cookie.name + '=' + cookie.value;
    }).join('; ');
  }
};