/**
 * 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
 */
 
 /* 
 ========================
	UPDATES by GMC
 ========================
  * working with options.defaultValue
  * working with options.cookieType
  * handling replacing cookies
    * extracting the cookieVal and getExpires function
  example: 
	- jQuery.cookie("test", false, { path: '/', expires: 1 });
	  - sets cookie "test" with value false; if this cookie already has existed, it is overwritten
	- jQuery.cookie("test", undefined, {defaultValue:false, cookieType:'bool' })
	  - gets cookie "test"; the value will by strongly typed boolean
	  - if the cookie doesn't exist, false is returned
 */
jQuery.cookie = function(name, value, options) {
	function cookieVal(name) {
        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 + '=')) {
                    return decodeURIComponent(cookie.substring(name.length + 1));
                }
            }
        }
        return null;
	}
	function getExpires(expirOpt)
	{
		var expires = '';
        if (expirOpt && (typeof expirOpt == 'number' || expirOpt.toUTCString)) {
            var date;
            if (typeof expirOpt == 'number') {
                date = new Date();
                date.setTime(date.getTime() + (expirOpt * 24 * 60 * 60 * 1000));
            } else {
                date = expirOpt;
            }
            expires = '; expires=' + date.toUTCString(); // use expires attribute, max-age is not supported by IE
        }
        return expires;
	}
	
    if (typeof value != 'undefined') { // name and value given, set cookie
        options = options || {};
        if (value === null) {
            value = '';
            options.expires = -1;
        }
        var expires = getExpires(options.expires);
        // 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' : '';
        
        // if cookie should be set, but there is older cookie with the same name, we need to delete the old and add new
        if (options.expires != -1 && cookieVal(name) != null)
			document.cookie = [name, '=', encodeURIComponent(value), getExpires(-1), path, domain, secure].join('');
        document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join('');
    } else { // only name given, get cookie
        cookieValue = cookieVal(name);
        originalCookieValue = cookieValue;
        
        options = options || {};
        
        if (typeof options.defaultValue != 'undefined' && cookieValue == null)
			cookieValue = options.defaultValue;
			
		if (typeof options.cookieType != 'undefined' && cookieValue != null)
		{
			switch(options.cookieType) {
				// convert to string - not needed
				case 'string':	cookieValue = cookieValue.toString();
								break;
				// convert to int
				case 'int'   :	if (typeof cookieValue == 'number')
									break;
								cookieValue = parseInt(cookieValue); 
								if (isNaN(cookieValue))
									throw 'Cookie is not valid int value: ' + originalCookieValue;
								break;
				// convert to boolean
				case 'bool'  :	if (typeof cookieValue == 'boolean')
									break;
								if (!isNaN(parseInt(cookieValue))) 	cookieValue = parseInt(cookieValue) == 0 ? false : true;
								else if (typeof cookieValue == 'string' && /^true$/i.test(cookieValue)) cookieValue = true;
								else if (typeof cookieValue == 'string' && /^false$|^$/i.test(cookieValue)) cookieValue = false;
								// what else? no idea; throw the exception
								else throw 'Cookie is not valid boolean value: ' + originalCookieValue;
								break;
				default: throw 'Uknown option value: ' + options.cookieType;
				
			}
		}
        return cookieValue;
    }
};