/**
 * Cookie plugin
 *
 * Copyright (c) 2006 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
 *
 */

/**
 * Create a cookie with the given name 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 name The name 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 name.
 *
 * @example $.cookie('the_cookie');
 * @desc Get the value of a cookie.
 *
 * @param String name The name 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(name, value, options) {
		if (typeof value != 'undefined') { // name and value given, set cookie
				options = options || {};
				if (value === null) {
						value = '';
						options.expires = -1;
				}
				var expires = '';
				if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) {
						var date;
						if (typeof options.expires == 'number') {
								date = new Date();
								date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000));
						} else {
								date = options.expires;
						}
						expires = '; expires=' + date.toUTCString(); // use expires attribute, max-age is not supported by IE
				}
				// CAUTION: Needed to parenthesize options.path and options.domain
				// in the following expressions, otherwise they evaluate to undefined
				// in the packed version for some reason...
				var path = options.path ? '; path=' + (options.path) : '';
				var domain = options.domain ? '; domain=' + (options.domain) : '';
				var secure = options.secure ? '; secure' : '';
				document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join('');
		} else { // only name given, get cookie
				var cookieValue = null;
				if (document.cookie && document.cookie != '') {
						var cookies = document.cookie.split(';');
						for (var i = 0; i < cookies.length; i++) {
								var cookie = jQuery.trim(cookies[i]);
								// Does this cookie string begin with the name we want?
								if (cookie.substring(0, name.length + 1) == (name + '=')) {
										cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
										break;
								}
						}
				}
				return cookieValue;
		}
};