/*jslint browser: true */ /*global jQuery: true */

//
// jQuery Cookie plugin
//
// Copyright (c) 2010 Klaus Hartl (stilbuero.de)
// Dual licensed under the MIT and GPL licenses:
// http://www.opensource.org/licenses/mit-license.php
// http://www.gnu.org/licenses/gpl.html
//
//

// TODO JsDoc

//
// Create a cookie with the given key and value and other optional parameters.
//
// @example $.cookie('the_cookie', 'the_value');
// @desc Set the value of a cookie.
// @example $.cookie('the_cookie', 'the_value', { expires: 7, path: '/', domain: 'jquery.com', secure: true });
// @desc Create a cookie with all available options.
// @example $.cookie('the_cookie', 'the_value');
// @desc Create a session cookie.
// @example $.cookie('the_cookie', null);
// @desc Delete a cookie by passing null as value. Keep in mind that you have to use the same path and domain
//       used when the cookie was set.
//
// @param String key The key of the cookie.
// @param String value The value of the cookie.
// @param Object options An object literal containing key/value pairs to provide optional cookie attributes.
// @option Number|Date expires Either an integer specifying the expiration date from now on in days or a Date object.
//                             If a negative value is specified (e.g. a date in the past), the cookie will be deleted.
//                             If set to null or omitted, the cookie will be a session cookie and will not be retained
//                             when the the browser exits.
// @option String path The value of the path atribute of the cookie (default: path of page that created the cookie).
// @option String domain The value of the domain attribute of the cookie (default: domain of page that created the cookie).
// @option Boolean secure If true, the secure attribute of the cookie will be set and the cookie transmission will
//                        require a secure protocol (like HTTPS).
// @type undefined
//
// @name $.cookie
// @cat Plugins/Cookie
// @author Klaus Hartl/klaus.hartl@stilbuero.de
//

//
// Get the value of a cookie with the given key.
//
// @example $.cookie('the_cookie');
// @desc Get the value of a cookie.
//
// @param String key The key of the cookie.
// @return The value of the cookie.
// @type String
//
// @name $.cookie
// @cat Plugins/Cookie
// @author Klaus Hartl/klaus.hartl@stilbuero.de
//
jQuery.cookie = function (key, value, options) {

  // key and at least value given, set cookie...
  if (arguments.length > 1 && String(value) !== "[object Object]") {
    options = jQuery.extend({}, options);

    if (value === null || value === undefined) {
      options.expires = -1;
    }

    if (typeof options.expires === 'number') {
      var days = options.expires, t = options.expires = new Date();
      t.setDate(t.getDate() + days);
    }

    value = String(value);

    return (document.cookie = [
      encodeURIComponent(key), '=',
      options.raw ? value : encodeURIComponent(value),
      options.expires ? '; expires=' + options.expires.toUTCString() : '', // use expires attribute, max-age is not supported by IE
      options.path ? '; path=' + options.path : '',
      options.domain ? '; domain=' + options.domain : '',
      options.secure ? '; secure' : ''
    ].join(''));
  }

  // key and possibly options given, get cookie...
  options = value || {};
  var result, decode = options.raw ? function (s) {
    return s;
  } : decodeURIComponent;
  return (result = new RegExp('(?:^|; )' + encodeURIComponent(key) + '=([^;]*)').exec(document.cookie)) ? decode(result[1]) : null;
};