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/**
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 * Cookie plugin
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 *
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 * Copyright (c) 2006 Klaus Hartl (stilbuero.de)
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 * Dual licensed under the MIT and GPL licenses:
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 * http://www.opensource.org/licenses/mit-license.php
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 * http://www.gnu.org/licenses/gpl.html
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 *
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 */
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/**
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 * Create a cookie with the given name and value and other optional parameters.
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 *
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 * @example $.cookie('the_cookie', 'the_value');
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 * @desc Set the value of a cookie.
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 * @example $.cookie('the_cookie', 'the_value', { expires: 7, path: '/', domain: 'jquery.com', secure: true });
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 * @desc Create a cookie with all available options.
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 * @example $.cookie('the_cookie', 'the_value');
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 * @desc Create a session cookie.
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 * @example $.cookie('the_cookie', null);
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 * @desc Delete a cookie by passing null as value. Keep in mind that you have to use the same path and domain
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 *       used when the cookie was set.
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 *
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 * @param String name The name of the cookie.
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 * @param String value The value of the cookie.
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 * @param Object options An object literal containing key/value pairs to provide optional cookie attributes.
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 * @option Number|Date expires Either an integer specifying the expiration date from now on in days or a Date object.
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 *                             If a negative value is specified (e.g. a date in the past), the cookie will be deleted.
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 *                             If set to null or omitted, the cookie will be a session cookie and will not be retained
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 *                             when the the browser exits.
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 * @option String path The value of the path atribute of the cookie (default: path of page that created the cookie).
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 * @option String domain The value of the domain attribute of the cookie (default: domain of page that created the cookie).
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 * @option Boolean secure If true, the secure attribute of the cookie will be set and the cookie transmission will
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 *                        require a secure protocol (like HTTPS).
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 * @type undefined
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 *
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 * @name $.cookie
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 * @cat Plugins/Cookie
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 * @author Klaus Hartl/klaus.hartl@stilbuero.de
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 */
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/**
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 * Get the value of a cookie with the given name.
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 *
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 * @example $.cookie('the_cookie');
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 * @desc Get the value of a cookie.
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 *
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 * @param String name The name of the cookie.
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 * @return The value of the cookie.
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 * @type String
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 *
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 * @name $.cookie
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 * @cat Plugins/Cookie
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 * @author Klaus Hartl/klaus.hartl@stilbuero.de
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 */
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jQuery.cookie = function(name, value, options) {
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    if (typeof value != 'undefined') { // name and value given, set cookie
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        options = options || {};
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        if (value === null) {
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            value = '';
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            options.expires = -1;
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        }
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        var expires = '';
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        if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) {
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            var date;
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            if (typeof options.expires == 'number') {
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                date = new Date();
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                date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000));
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            } else {
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                date = options.expires;
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            }
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            expires = '; expires=' + date.toUTCString(); // use expires attribute, max-age is not supported by IE
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        }
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        // CAUTION: Needed to parenthesize options.path and options.domain
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        // in the following expressions, otherwise they evaluate to undefined
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        // in the packed version for some reason...
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        var path = options.path ? '; path=' + (options.path) : '';
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        var domain = options.domain ? '; domain=' + (options.domain) : '';
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        var secure = options.secure ? '; secure' : '';
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        document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join('');
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    } else { // only name given, get cookie
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        var cookieValue = null;
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        if (document.cookie && document.cookie != '') {
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            var cookies = document.cookie.split(';');
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            for (var i = 0; i < cookies.length; i++) {
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                var cookie = jQuery.trim(cookies[i]);
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                // Does this cookie string begin with the name we want?
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                if (cookie.substring(0, name.length + 1) == (name + '=')) {
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                    cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
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                    break;
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                }
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            }
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        }
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        return cookieValue;
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    }
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};