/**
* Utilities for cookie management
* @namespace YAHOO.util
* @module cookie
*/
YAHOO.namespace("util");
/**
* Cookie utility.
* @class Cookie
* @static
*/
YAHOO.util.Cookie = {
//-------------------------------------------------------------------------
// Private Methods
//-------------------------------------------------------------------------
/**
* Creates a cookie string that can be assigned into document.cookie.
* @param {String} name The name of the cookie.
* @param {String} value The value of the cookie.
* @param {Boolean} encodeValue True to encode the value, false to leave as-is.
* @param {Object} options (Optional) Options for the cookie.
* @return {String} The formatted cookie string.
* @method _createCookieString
* @private
* @static
*/
_createCookieString : function (name /*:String*/, value /*:Variant*/, encodeValue /*:Boolean*/, options /*:Object*/) /*:String*/ {
//shortcut
var lang = YAHOO.lang,
text = encodeURIComponent(name) + "=" + (encodeValue ? encodeURIComponent(value) : value);
if (lang.isObject(options)){
//expiration date
if (options.expires instanceof Date){
text += "; expires=" + options.expires.toUTCString();
}
//path
if (lang.isString(options.path) && options.path !== ""){
text += "; path=" + options.path;
}
//domain
if (lang.isString(options.domain) && options.domain !== ""){
text += "; domain=" + options.domain;
}
//secure
if (options.secure === true){
text += "; secure";
}
}
return text;
},
/**
* Formats a cookie value for an object containing multiple values.
* @param {Object} hash An object of key-value pairs to create a string for.
* @return {String} A string suitable for use as a cookie value.
* @method _createCookieHashString
* @private
* @static
*/
_createCookieHashString : function (hash /*:Object*/) /*:String*/ {
//shortcuts
var lang = YAHOO.lang;
if (!lang.isObject(hash)){
throw new TypeError("Cookie._createCookieHashString(): Argument must be an object.");
}
var text /*:Array*/ = [];
for (var key in hash){
if (lang.hasOwnProperty(hash, key) && !lang.isFunction(hash[key]) && !lang.isUndefined(hash[key])){
text.push(encodeURIComponent(key) + "=" + encodeURIComponent(String(hash[key])));
}
}
return text.join("&");
},
/**
* Parses a cookie hash string into an object.
* @param {String} text The cookie hash string to parse. The string should already be URL-decoded.
* @return {Object} An object containing entries for each cookie value.
* @method _parseCookieHash
* @private
* @static
*/
_parseCookieHash : function (text /*:String*/) /*:Object*/ {
var hashParts /*:Array*/ = text.split("&"),
hashPart /*:Array*/ = null,
hash /*:Object*/ = {};
if (text.length > 0){
for (var i=0, len=hashParts.length; i < len; i++){
hashPart = hashParts[i].split("=");
hash[decodeURIComponent(hashPart[0])] = decodeURIComponent(hashPart[1]);
}
}
return hash;
},
/**
* Parses a cookie string into an object representing all accessible cookies.
* @param {String} text The cookie string to parse.
* @param {Boolean} decode (Optional) Indicates if the cookie values should be decoded or not. Default is true.
* @return {Object} An object containing entries for each accessible cookie.
* @method _parseCookieString
* @private
* @static
*/
_parseCookieString : function (text /*:String*/, decode /*:Boolean*/) /*:Object*/ {
var cookies /*:Object*/ = {};
if (YAHOO.lang.isString(text) && text.length > 0) {
var decodeValue = (decode === false ? function(s){return s;} : decodeURIComponent);
var cookieParts /*:Array*/ = text.split(/;\s/g),
cookieName /*:String*/ = null,
cookieValue /*:String*/ = null,
cookieNameValue /*:Array*/ = null;
for (var i=0, len=cookieParts.length; i < len; i++){
//check for normally-formatted cookie (name-value)
cookieNameValue = cookieParts[i].match(/([^=]+)=/i);
if (cookieNameValue instanceof Array){
try {
cookieName = decodeURIComponent(cookieNameValue[1]);
cookieValue = decodeValue(cookieParts[i].substring(cookieNameValue[1].length+1));
} catch (ex){
//ignore the entire cookie - encoding is likely invalid
}
} else {
//means the cookie does not have an "=", so treat it as a boolean flag
cookieName = decodeURIComponent(cookieParts[i]);
cookieValue = "";
}
cookies[cookieName] = cookieValue;
}
}
return cookies;
},
//-------------------------------------------------------------------------
// Public Methods
//-------------------------------------------------------------------------
/**
* Determines if the cookie with the given name exists. This is useful for
* Boolean cookies (those that do not follow the name=value convention).
* @param {String} name The name of the cookie to check.
* @return {Boolean} True if the cookie exists, false if not.
* @method exists
* @static
*/
exists: function(name) {
if (!YAHOO.lang.isString(name) || name === ""){
throw new TypeError("Cookie.exists(): Cookie name must be a non-empty string.");
}
var cookies /*:Object*/ = this._parseCookieString(document.cookie, true);
return cookies.hasOwnProperty(name);
},
/**
* Returns the cookie value for the given name.
* @param {String} name The name of the cookie to retrieve.
* @param {Object|Function} options (Optional) An object containing one or more
* cookie options: raw (true/false) and converter (a function).
* The converter function is run on the value before returning it. The
* function is not used if the cookie doesn't exist. The function can be
* passed instead of the options object for backwards compatibility.
* @return {Variant} If no converter is specified, returns a string or null if
* the cookie doesn't exist. If the converter is specified, returns the value
* returned from the converter or null if the cookie doesn't exist.
* @method get
* @static
*/
get : function (name /*:String*/, options /*:Variant*/) /*:Variant*/{
var lang = YAHOO.lang,
converter;
if (lang.isFunction(options)) {
converter = options;
options = {};
} else if (lang.isObject(options)) {
converter = options.converter;
} else {
options = {};
}
var cookies /*:Object*/ = this._parseCookieString(document.cookie, !options.raw);
if (!lang.isString(name) || name === ""){
throw new TypeError("Cookie.get(): Cookie name must be a non-empty string.");
}
if (lang.isUndefined(cookies[name])) {
return null;
}
if (!lang.isFunction(converter)){
return cookies[name];
} else {
return converter(cookies[name]);
}
},
/**
* Returns the value of a subcookie.
* @param {String} name The name of the cookie to retrieve.
* @param {String} subName The name of the subcookie to retrieve.
* @param {Function} converter (Optional) A function to run on the value before returning
* it. The function is not used if the cookie doesn't exist.
* @return {Variant} If the cookie doesn't exist, null is returned. If the subcookie
* doesn't exist, null if also returned. If no converter is specified and the
* subcookie exists, a string is returned. If a converter is specified and the
* subcookie exists, the value returned from the converter is returned.
* @method getSub
* @static
*/
getSub : function (name, subName, converter) {
var lang = YAHOO.lang,
hash = this.getSubs(name);
if (hash !== null) {
if (!lang.isString(subName) || subName === ""){
throw new TypeError("Cookie.getSub(): Subcookie name must be a non-empty string.");
}
if (lang.isUndefined(hash[subName])){
return null;
}
if (!lang.isFunction(converter)){
return hash[subName];
} else {
return converter(hash[subName]);
}
} else {
return null;
}
},
/**
* Returns an object containing name-value pairs stored in the cookie with the given name.
* @param {String} name The name of the cookie to retrieve.
* @return {Object} An object of name-value pairs if the cookie with the given name
* exists, null if it does not.
* @method getSubs
* @static
*/
getSubs : function (name /*:String*/) /*:Object*/ {
var isString = YAHOO.lang.isString;
//check cookie name
if (!isString(name) || name === ""){
throw new TypeError("Cookie.getSubs(): Cookie name must be a non-empty string.");
}
var cookies = this._parseCookieString(document.cookie, false);
if (isString(cookies[name])){
return this._parseCookieHash(cookies[name]);
}
return null;
},
/**
* Removes a cookie from the machine by setting its expiration date to
* sometime in the past.
* @param {String} name The name of the cookie to remove.
* @param {Object} options (Optional) An object containing one or more
* cookie options: path (a string), domain (a string),
* and secure (true/false). The expires option will be overwritten
* by the method.
* @return {String} The created cookie string.
* @method remove
* @static
*/
remove : function (name /*:String*/, options /*:Object*/) /*:String*/ {
//check cookie name
if (!YAHOO.lang.isString(name) || name === ""){
throw new TypeError("Cookie.remove(): Cookie name must be a non-empty string.");
}
//set options - clone options so the original isn't affected
options = YAHOO.lang.merge(options || {}, {
expires: new Date(0)
});
//set cookie
return this.set(name, "", options);
},
/**
* Removes a subcookie with a given name. Removing the last subcookie
* won't remove the entire cookie unless options.removeIfEmpty is true.
* @param {String} name The name of the cookie in which the subcookie exists.
* @param {String} subName The name of the subcookie to remove.
* @param {Object} options (Optional) An object containing one or more
* cookie options: path (a string), domain (a string), expires (a Date object),
* removeIfEmpty (true/false), and secure (true/false). This must be the same
* settings as the original subcookie.
* @return {String} The created cookie string.
* @method removeSub
* @static
*/
removeSub : function(name /*:String*/, subName /*:String*/, options /*:Object*/) /*:String*/ {
var lang = YAHOO.lang;
options = options || {};
//check cookie name
if (!lang.isString(name) || name === ""){
throw new TypeError("Cookie.removeSub(): Cookie name must be a non-empty string.");
}
//check subcookie name
if (!lang.isString(subName) || subName === ""){
throw new TypeError("Cookie.removeSub(): Subcookie name must be a non-empty string.");
}
//get all subcookies for this cookie
var subs = this.getSubs(name);
//delete the indicated subcookie
if (lang.isObject(subs) && lang.hasOwnProperty(subs, subName)){
delete subs[subName];
if (!options.removeIfEmpty) {
//reset the cookie
return this.setSubs(name, subs, options);
} else {
//reset the cookie if there are subcookies left, else remove
for (var key in subs){
if (lang.hasOwnProperty(subs, key) && !lang.isFunction(subs[key]) && !lang.isUndefined(subs[key])){
return this.setSubs(name, subs, options);
}
}
return this.remove(name, options);
}
} else {
return "";
}
},
/**
* Sets a cookie with a given name and value.
* @param {String} name The name of the cookie to set.
* @param {Variant} value The value to set for the cookie.
* @param {Object} options (Optional) An object containing one or more
* cookie options: path (a string), domain (a string), expires (a Date object),
* raw (true/false), and secure (true/false).
* @return {String} The created cookie string.
* @method set
* @static
*/
set : function (name /*:String*/, value /*:Variant*/, options /*:Object*/) /*:String*/ {
var lang = YAHOO.lang;
options = options || {};
if (!lang.isString(name)){
throw new TypeError("Cookie.set(): Cookie name must be a string.");
}
if (lang.isUndefined(value)){
throw new TypeError("Cookie.set(): Value cannot be undefined.");
}
var text /*:String*/ = this._createCookieString(name, value, !options.raw, options);
document.cookie = text;
return text;
},
/**
* Sets a sub cookie with a given name to a particular value.
* @param {String} name The name of the cookie to set.
* @param {String} subName The name of the subcookie to set.
* @param {Variant} value The value to set.
* @param {Object} options (Optional) An object containing one or more
* cookie options: path (a string), domain (a string), expires (a Date object),
* and secure (true/false).
* @return {String} The created cookie string.
* @method setSub
* @static
*/
setSub : function (name /*:String*/, subName /*:String*/, value /*:Variant*/, options /*:Object*/) /*:String*/ {
var lang = YAHOO.lang;
if (!lang.isString(name) || name === ""){
throw new TypeError("Cookie.setSub(): Cookie name must be a non-empty string.");
}
if (!lang.isString(subName) || subName === ""){
throw new TypeError("Cookie.setSub(): Subcookie name must be a non-empty string.");
}
if (lang.isUndefined(value)){
throw new TypeError("Cookie.setSub(): Subcookie value cannot be undefined.");
}
var hash /*:Object*/ = this.getSubs(name);
if (!lang.isObject(hash)){
hash = {};
}
hash[subName] = value;
return this.setSubs(name, hash, options);
},
/**
* Sets a cookie with a given name to contain a hash of name-value pairs.
* @param {String} name The name of the cookie to set.
* @param {Object} value An object containing name-value pairs.
* @param {Object} options (Optional) An object containing one or more
* cookie options: path (a string), domain (a string), expires (a Date object),
* and secure (true/false).
* @return {String} The created cookie string.
* @method setSubs
* @static
*/
setSubs : function (name /*:String*/, value /*:Object*/, options /*:Object*/) /*:String*/ {
var lang = YAHOO.lang;
if (!lang.isString(name)){
throw new TypeError("Cookie.setSubs(): Cookie name must be a string.");
}
if (!lang.isObject(value)){
throw new TypeError("Cookie.setSubs(): Cookie value must be an object.");
}
var text /*:String*/ = this._createCookieString(name, this._createCookieHashString(value), false, options);
document.cookie = text;
return text;
}
};