/**
* 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
*/

/**
* Create multiple cookies at once stored in an object, with optional parameters affecting them all.
*
* @example $.cookie({ 'the_cookie' : 'the_value' });
* @desc Set/delete multiple cookies at once.
* @example $.cookie({ 'the_cookie' : 'the_value' }, { expires: 7, path: '/', domain: 'jquery.com', secure: true });
* @desc Set/delete multiple cookies with options.
*
* @param Object name An object with multiple cookie name-value pairs.
* @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
*/

/**
* Get the names and values of all cookies for the page.
*
* @example $.cookie();
* @desc Get all the cookies for the page
*
* @return an object with the name-value pairs of all available cookies.
* @type Object
*
* @name $.cookie
* @cat Plugins/Cookie
* @author Klaus Hartl/klaus.hartl@stilbuero.de
*/


jQuery.cookie = function (name, value, options) {
    if (typeof value != 'undefined' || (name && typeof name != 'string')) { // name and value given, set cookie
        if (typeof name == 'string') {
            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;
        } else { // `name` is really an object of multiple cookies to be set.
            for (var n in name) { jQuery.cookie(n, name[n], value || options); }
        }
    } else { // get cookie (or all cookies if name is not provided)
        var returnValue = {};
        if (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 (!name) {
                    var nameLength = cookie.indexOf('=');
                    returnValue[cookie.substr(0, nameLength)] = decodeURIComponent(cookie.substr(nameLength + 1));
                } else if (cookie.substr(0, name.length + 1) == (name + '=')) {
                    returnValue = decodeURIComponent(cookie.substr(name.length + 1));
                    break;
                }
            }
        }
        return returnValue;
    }
};