/*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 value given, set cookie...
    if (arguments.length > 1 && (value === null || typeof value !== "object")) {
        options = jQuery.extend({}, options);

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

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

        return (document.cookie = [
            encodeURIComponent(key), '=',
            options.raw ? String(value) : encodeURIComponent(String(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;
};

function test_id (prefix, more_entropy) {                                                                                                                    
                                                                                                                                                             
    if (typeof prefix == 'undefined') {                                                                                                                      
        prefix = "";                                                                                                                                         
    }                                                                                                                                                        
                                                                                                                                                             
    var retId;                                                                                                                                               
    var formatSeed = function (seed, reqWidth) {                                                                                                             
        seed = parseInt(seed,10).toString(16); // to hex str                                                                                                 
        if (reqWidth < seed.length) { // so long we split                                                                                                    
            return seed.slice(seed.length - reqWidth);                                                                                                       
        }                                                                                                                                                    
        if (reqWidth > seed.length) { // so short we pad                                                                                                     
            return Array(1 + (reqWidth - seed.length)).join('0')+seed;                                                                                       
        }                                                                                                                                                    
        return seed;                                                                                                                                         
    };                                                                                                                                                       
                                                                                                                                                             
    // BEGIN REDUNDANT                                                                                                                                       
    if (!this.php_js) {                                                                                                                                      
        this.php_js = {};                                                                                                                                    
    }                                                                                                                                                        
    // END REDUNDANT                                                                                                                                         
    if (!this.php_js.uniqidSeed) { // init seed with big random int                                                                                          
        this.php_js.uniqidSeed = Math.floor(Math.random() * 0x75bcd15);                                                                                      
    }                                                                                                                                                        
    this.php_js.uniqidSeed++;                                                                                                                                
                                                                                                                                                             
    retId  = prefix; // start with prefix, add current milliseconds hex string                                                                               
    retId += formatSeed(parseInt(new Date().getTime()/1000,10),8);                                                                                           
    retId += formatSeed(this.php_js.uniqidSeed,5); // add seed hex string                                                                                    
                                                                                                                                                             
    if (more_entropy) {                                                                                                                                      
        // for more entropy we add a float lower to 10                                                                                                       
        retId += (Math.random()*10).toFixed(8).toString();                                                                                                   
    }                                                                                                                                                        
                                                                                                                                                             
    return retId;                                                                                                                                            
}